Locking structure and unlocking structure for switch operating mechanism

Abstract

The utility model relates to a locking structure and an unlocking structure for a switch operating mechanism, the locking structure for the switch operating mechanism comprises a first locking arm, a second locking arm and a locking disc, the locking disc is used for being assembled with a main shaft in a rotation stopping manner, one end of the first locking arm and one end of the second locking arm are hinged, and the other end of the first locking arm and the other end of the second locking arm are connected through an elastic piece; a first stopping face is arranged on the portion, located between the first locking arm and the second locking arm, of the locking disc, a first locking portion is arranged on the inner side of the first locking arm, a second locking portion is arranged on the inner side of the second locking arm, and when the locking disc is in the locking state, the first locking portion abuts against the first stopping face. Through the locking structure matched with the upper portion of the main shaft and the limiting structure matched with the lower portion of the main shaft, up-down bidirectional limiting can be achieved, it is guaranteed that the output shaft does not move due to changes of external force after being in butt joint with the switch body, and the stability of the output angle of the operating mechanism is guaranteed. When unlocking is needed, unlocking is carried out through a matched unlocking structure.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switch operating mechanisms, in particular to a locking structure and an unlocking structure for a switch operating mechanism. Background Art

[0002] The isolating switch operating mechanism is an electrical control device used to operate high-voltage circuit breakers, high-voltage load switches and high-voltage isolating switches. It is mainly used to close and open the switch equipment.

[0003] For example, the utility model patent with authorization announcement number CN201181670Y discloses a precisely positioned three-position switch operating mechanism, which primarily includes an electric motor, a gear transmission pair, and a worm gear pair. A balance wheel is provided on one side of the worm gear pair, which is used to engage with a pin on the worm gear pair. The balance wheel is provided with a power output shaft. When the mechanism switches state, the pin on the worm gear pair rotates with the worm wheel and pushes the balance wheel to rotate. The balance wheel drives the power output shaft to a predetermined position, while a locking slider on the worm gear pair locks the balance wheel. The patent does not specifically describe the structure and principle of the locking slider. For operating mechanisms used in UHV disconnector equipment, higher requirements are placed on their structural design and operational stability. Therefore, a locking structure for the switch operating mechanism is required to ensure that the output shaft can be accurately rotated to the predetermined position and then maintained in place. Utility Model Content

[0004] The purpose of the utility model is to provide a locking structure for a switch operating mechanism to solve the problem of maintaining the output shaft of the operating mechanism after it rotates to a predetermined position; at the same time, the utility model also provides an unlocking structure for the switch operating mechanism to release the locked state of the mechanism.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The switch operating mechanism uses a locking structure, including a first locking arm, a second locking arm and a locking disk. The locking disk is used to be assembled with the main shaft to stop rotation. One end of the first locking arm and the second locking arm are both hinged, and the other ends of the first locking arm and the second locking arm are connected by an elastic member; a first stopping surface is provided on the part of the locking disk located between the first locking arm and the second locking arm, a first locking portion is provided on the inner side of the first locking arm, and a second locking portion is provided on the inner side of the second locking arm. When the first locking portion abuts against the first stopping surface, the locking disk is in a locked state.

[0007] Furthermore, the elastic member is a tension spring.

[0008] Furthermore, the other ends of the first locking arm and the second locking arm are spaced apart, the tension spring is located at the space between the first locking arm and the second locking arm, and both ends of the tension spring are respectively connected to the other ends of the first locking arm and the second locking arm.

[0009] Furthermore, the middle sections of the first locking arm and the second locking arm are convex and have curved notches formed on the corresponding inner sides. The curved notches of the first locking arm and the second locking arm are located on the periphery of the lock disk.

[0010] Furthermore, the first locking portion and the second locking portion are respectively located at one end of the corresponding curved notch.

[0011] Furthermore, the lock disk is formed by cutting off part of the structure of a circular disk, and the lock disk also has a second stop surface symmetrically arranged with the first stop surface, and the first stop surface and the second stop surface are connected by a transition surface.

[0012] Furthermore, an auxiliary arm is provided on the lower side of a section of the first locking arm and the second locking arm close to the hinged portion.

[0013] The unlocking structure of the switch operating mechanism includes a rotating part rotatably assembled on the main shaft, and an unlocking part is provided on the upper side of the rotating part. The unlocking part rotates synchronously with the rotating part, and when the lock disk is in the locked state, the unlocking part is in a state of pushing the second lock arm open; when the lock disk is in the unlocked state, the unlocking part is in a state of pushing the first lock arm open.

[0014] Furthermore, the rotating member is a worm gear.

[0015] Furthermore, the unlocking portion is a special-shaped nut, which is installed on one end of the bolt, and the bolt passes through the rotating member along the axial direction.

[0016] Beneficial effects of the utility model:

[0017] After the main shaft rotates in one direction to a set angle, it is restrained by a limiting structure on the outer periphery of the main shaft bottom, ensuring the accuracy of the output shaft's rotation angle. Simultaneously, the locking structure of the utility model limits the upper end of the main shaft. The locking arm can lock the lock disk, so that the main shaft, which rotates synchronously with the lock disk, cannot rotate. This achieves bidirectional upper and lower limiting, ensuring that the output shaft does not move due to changes in external forces after docking with the switch body, and ensuring the stability of the output angle of the operating mechanism. When unlocking is required, it is unlocked by the matching unlocking structure, and the main shaft can rotate in the opposite direction under the drive of the power component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of the transmission mechanism used in the switch operating mechanism of the utility model;

[0019] Figure 2 It is a schematic diagram of the coordination between the worm gear, push plate and main shaft;

[0020] Figure 3 It is a schematic diagram of the cooperation between the push plate and the limit structure;

[0021] Figure 4 This is a top view of the locking structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the locking structure of the utility model cooperating with other components in the operating mechanism (in the locked state);

[0023] Figure 6 This is a schematic diagram of the locking structure of the utility model cooperating with other components in the operating mechanism (in the unlocked state);

[0024] Figure 7 It is an exploded view of the main components of the switch operating mechanism.

[0025] 1. Motor gear; 2. Worm gear; 3. Worm; 4. Worm wheel; 5. Main shaft; 6. Limiting structure; 61. Fixed seat; 62. Adjusting bolt; 63. Limiting arm; 64. Limiting part; 7. Driving gear; 8. Output gear; 9. Output shaft; 10. Push plate; 101. Driving groove; 102. Stop cam; 11. Driving member; 12. Unlocking part; 13. Locking plate; 131. First stopping surface; 132. Second stopping surface; 14. First locking arm; 141. First locking part; 15. Second locking arm; 151. Second locking part; 16. Tension spring; 17. Articulated part; 18. Auxiliary arm. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0027] Embodiments of the present utility model:

[0028] In order to better understand the locking and unlocking principles of the present invention, the operating principles of the main mechanisms of the switch operating mechanism are first explained.

[0029] like Figures 1 to 3 As shown, the switch operating mechanism includes a worm 3 and a worm wheel 4, on which a main shaft 5 is rotatably mounted. A worm gear 2 is mounted at one end of the worm 3, meshing with a motor gear 1. Motor gear 1 is located on the motor shaft, which is parallel to the worm 3. The worm gear 2 and motor gear 1 are separate definitions of gears; both are spur gears.

[0030] The main shaft 5 is provided with a driving gear 7, which is connected to the main shaft 5 via a double parallel key. The output shaft 9 is provided with an output gear 8, which is meshed with the driving gear 7.

[0031] like Figure 2 As shown, a driver 11 is provided on the lower end surface of the worm gear 4. This driver 11 is eccentrically positioned and utilizes a hexagon socket head bolt. This bolt is connected to the worm gear 4, utilizing its cylindrical head as the driving portion. A push plate 10 is fixed to the spindle 5, and the driver 11 is used to drive this push plate 10 for rotation. The push plate 10 is assembled to the spindle 5 via a double parallel key and is located below the worm gear 4.

[0032] like Figure 2 and 3 As shown, a drive groove 101 is provided on one side of the outer periphery of the push plate 10. The drive groove 101 extends through the thickness of the push plate 10, and the bottom of the drive groove 101 is arc-shaped. The length of the drive groove 101 is greater than the outer diameter of the cylindrical head of the hexagon socket head bolt. The drive groove 101 and the drive member 11 form a bidirectional transmission, that is, the push plate can rotate forward or reverse. The main shaft 5 and the worm gear 4 are rotatably assembled via bearings, that is, the main shaft 5 and the worm gear 4 rotate asynchronously. When the worm gear 4 rotates, it drives the push plate 10 via the drive member 11, which further drives the main shaft 5.

[0033] like Figure 3 As shown, a stop cam 102 is provided on the other side of the outer periphery of the push plate 10, which is used to cooperate with the limiting structure 6 after rotating a certain angle. The limiting structure 6 includes a fixed seat 61 and a limiting arm 63. One end of the limiting arm 63 is rotatably assembled on the main shaft 5, and the two are connected by a bearing steel bushing. A limiting portion 64 is provided at the other end of the limiting arm 63, which is used to cooperate with the above-mentioned stop cam 102. The limiting portion 64 adopts a hexagon socket head bolt, and the cylindrical head of the bolt is used for limiting. After the push plate 10 rotates a certain angle, the stop cam 102 on the push plate 10 will touch the limit 64, so that the other end of the limit arm 63 is close to the fixed seat 61, thereby achieving the purpose of limiting.

[0034] The fixing seat 61 is U-shaped, with an adjusting bolt 62 provided at each end. One end (inner end) of the adjusting bolt 62 is used to limit the other end of the limiting arm 63 to limit the rotation angle of the other end of the limiting arm 63.

[0035] During use, the power output by the motor is transmitted in sequence through the motor gear 1, worm gear 2, worm 3, and worm wheel 4. When the worm wheel 4 rotates, it drives the push plate 10 to rotate through the driving member 11. The main shaft 5 rotates synchronously with the push plate 10. After the main shaft 5 rotates a certain angle, the stop 102 on the other side of the push plate 10 touches the limit part 64 in the limit structure 6, and the end of the limit arm 63 is blocked in the fixed seat 61, achieving the limit. At the same time, when the main shaft 5 rotates, the main shaft 5 drives the output shaft 9 to rotate according to the set angle through the transmission of the driving gear 7 and the output gear 8, and outputs the set torque. The output shaft 9 is used to connect to the disconnector body. By rotating forward or reverse, the disconnector closes or opens.

[0036] The improvement of this utility model lies in that, after the main shaft 5 rotates a certain angle and the end of the limit arm 63 is stopped in the fixed seat 61, the upper end of the main shaft 5 is restrained by a locking structure, thereby achieving bidirectional upper and lower limit. This ensures that the output shaft does not move due to external forces after docking with the switch body, ensuring the stability of the mechanism's output angle. When unlocking is required, the unlocking structure is used to unlock the main shaft, allowing the main shaft to rotate in the opposite direction. The locking structure of this utility model is described below.

[0037] like Figure 4-Figure 7 As shown, the locking structure for the switch operating mechanism includes a first locking arm 14, a second locking arm 15, and a locking plate 13. The locking plate 13 is assembled with the main shaft via a double parallel key to prevent rotation, meaning that the locking plate 13 rotates synchronously with the main shaft. One end of each of the first and second locking arms 14, 15 is hinged to the operating mechanism frame, allowing them to rotate within a certain angle within the horizontal plane when subjected to force.

[0038] The other ends of the first locking arm 14 and the second locking arm 15 are connected by an elastic member, which is a tension spring 16. The other ends of the first locking arm 14 and the second locking arm 15 are spaced apart, and the tension spring 16 is located in the space between the first locking arm 14 and the second locking arm 15. The circular hooks at both ends of the tension spring 16 are respectively hooked with the through holes at the other ends of the first locking arm 14 and the second locking arm 15.

[0039] The middle sections of the first locking arm 14 and the second locking arm 15 are convex and have curved notches formed on their inner sides. The curved notches of the first locking arm 14 and the second locking arm 15 are located on the periphery of the locking plate 13. The first locking arm 14 and the second locking arm 15 have the same structure, and their curved notches are opposite to each other, forming an irregular C-shaped opening.

[0040] The lock disk 13 is located in the space between the first lock arm 14 and the second lock arm 15. The shape of the lock disk 13 can be understood as a circular disk with a portion of its structure cut away, with the portion greater than half of its circumference remaining disc-shaped. The lock disk 13 is provided with a first stop surface 131 and a second stop surface 132 symmetrically disposed with respect to the first stop surface 131. The first and second stop surfaces 131, 132 are connected by a transition surface.

[0041] A first locking portion 141 is provided on the inner side of the first locking arm 14, and a second locking portion 151 is provided on the inner side of the second locking arm 15. When the lock plate 13 is in the locked position, the first locking portion 141 abuts against the first blocking surface 131. The first locking portion 141 and the second locking portion 151 are respectively located at one end of the corresponding curved notch, on the side closest to the tension spring 16. The first locking portion 141 and the second locking portion 151 can be understood as arc-shaped protrusions.

[0042] An auxiliary arm 18 is provided below the first and second locking arms 14, 15, at a section near the hinged portion 17. Auxiliary arm 18 is shorter than the first and second locking arms 14, 15, and its shape matches the corresponding locking arm section above it, connected via bolts. When the unlocking portion 12 rotates with the worm gear, it contacts the inner side of the auxiliary arm 18 during unlocking, pushing the corresponding locking arm open. In other embodiments, the locking arms can also be designed as an integral unit, with the wall thickness locally increased at the auxiliary arm location to mate with the unlocking portion 12.

[0043] like Figure 4 and 5 As shown, the unlocking structure of the switch operating mechanism includes a worm gear rotatably mounted on the main shaft, and an unlocking portion 12 is provided on the upper side of the worm gear. The unlocking portion 12 rotates synchronously with the worm gear. When the lock plate 13 is in the locked state, the unlocking portion 12 is in the state of pushing the second lock arm 15 open, as shown in FIG. Figure 5 When the lock plate 13 is in the unlocked state, the unlocking portion 12 is in the state of pushing the first locking arm 14 open, as shown Figure 6 In other embodiments, other rotating parts, such as a turntable, may be used instead of the worm gear by applying the design concept of the present utility model.

[0044] The unlocking portion 12 is a special-shaped nut, mounted on one end of a bolt that passes axially through the rotating member. The bolt is the aforementioned driver 11, and the special-shaped nut serves as both the bolt's nut and the unlocking portion 12. The difference between a special-shaped nut and a conventional hexagonal nut is that the majority of its outer surface is cylindrical, with flat surfaces cut on opposite sides of the cylindrical surface for tool engagement when tightening the nut. This cylindrical surface mates with the inner curved surface of the locking arm.

[0045] like Figure 5 As shown, when the lock disk 13 is in the locked state, the unlocking portion 12 is in the state of pushing the second lock arm 15 open. The tension of the tension spring 16 at one end of the second lock arm 15 causes the first lock arm 14 to move closer to the lock disk 13. Finally, the first locking portion 141 of the first lock arm 14 abuts against the first stop surface 131, so that the lock disk 13 cannot continue to rotate clockwise, and thus the main shaft and the output shaft cannot rotate clockwise. Figure 6 As shown, when unlocking is required, the worm gear rotates counterclockwise, driving the unlocking portion 12 to rotate counterclockwise. After rotating a certain angle, the unlocking portion 12 begins to contact the first locking arm 14 and pushes the first locking arm 14 away. As a result, the first locking portion 141 of the first locking arm 14 releases the restriction on the first stop surface 131. After unlocking, the main shaft rotates clockwise under the push of the push disk, and the lock disk 13 rotates clockwise synchronously. When the main shaft rotates clockwise until it is limited by the limiting structure 6, the lock disk 13 rotates clockwise to another locked state where the second stop surface 132 cooperates with the first locking portion 141.

[0046] Unless otherwise specified, the term "connection" in this utility model includes both direct and indirect connections. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

Claims

1. A locking structure for a switch operating mechanism, characterized in that: The lock plate includes a first locking arm, a second locking arm and a locking plate, the locking plate is used to be assembled with the main shaft to stop rotation, one end of the first locking arm and the second locking arm are hinged, and the other ends of the first locking arm and the second locking arm are connected by an elastic member; a first stopping surface is provided on the part of the lock plate located between the first locking arm and the second locking arm, a first locking portion is provided on the inner side of the first locking arm, and a second locking portion is provided on the inner side of the second locking arm, and when the first locking portion abuts against the first stopping surface, the lock plate is in a locked state.

2. The locking structure for a switch operating mechanism according to claim 1, characterized in that: The elastic member is a tension spring.

3. The locking structure for a switch operating mechanism according to claim 1, characterized in that: The other ends of the first locking arm and the second locking arm are spaced apart, and the tension spring is located at the space between the first locking arm and the second locking arm. Both ends of the tension spring are respectively connected to the other ends of the first locking arm and the second locking arm.

4. The locking structure for a switch operating mechanism according to claim 1, wherein: The middle sections of the first locking arm and the second locking arm are convex and have curved notches formed on the corresponding inner sides. The curved notches of the first locking arm and the second locking arm are located on the periphery of the lock disk.

5. The locking structure for a switch operating mechanism according to claim 4, characterized in that: The first locking portion and the second locking portion are respectively located at one end portion of the corresponding curved notch.

6. The locking structure for a switch operating mechanism according to claim 5, characterized in that: The lock disk is formed by cutting off part of the structure of a circular disk. The lock disk also has a second stop surface symmetrically arranged with the first stop surface. The first stop surface and the second stop surface are connected by a transition surface.

7. The locking structure for a switch operating mechanism according to claim 1, characterized in that: An auxiliary arm is provided on the lower side of a section of the first locking arm and the second locking arm close to the hinge portion.

8. An unlocking structure for a switch operating mechanism, characterized in that: It includes a rotating part rotatably assembled on the main shaft, and an unlocking part is provided on the upper side of the rotating part. The unlocking part rotates synchronously with the rotating part, and when the lock disk is in a locked state, the unlocking part is in a state of pushing the second locking arm open; when the lock disk is in an unlocked state, the unlocking part is in a state of pushing the first locking arm open.

9. The unlocking structure for a switch operating mechanism according to claim 8, characterized in that: The rotating member is a worm gear.

10. The unlocking structure for a switch operating mechanism according to claim 8, characterized in that: The unlocking portion is a special-shaped nut, which is mounted on one end of a bolt, and the bolt passes through the rotating member in the axial direction.

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