Transmission mechanism for switch operating mechanism

Abstract

The utility model relates to a transmission mechanism for a switch operating mechanism, which comprises a worm and a worm gear, a main shaft is rotatably assembled on the worm gear, a driving part is arranged on the lower end face of the worm gear, a push disc is assembled on the main shaft in a rotation stopping manner, the driving part is used for pushing the push disc to rotate, and a driving gear is arranged on the main shaft and used for driving an output shaft parallel to the main shaft. The transmission mechanism can meet the requirements that the output shaft rotates according to a set angle and outputs corresponding torque, and the structural layout is more compact and reasonable. The limiting structure limits the rotating angle range of the push disc, the rotating angle range is adjustable, adaptability is better, and the precision of the rotating angle of the output shaft can be better guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of switch operating mechanisms, in particular to a transmission mechanism 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 precise positioning 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 secondary worm gear pair, which is used to engage with a pin on the secondary worm gear pair. The balance wheel is also provided with a power output shaft. When the mechanism switches state, the pin on the secondary worm gear pair rotates with the worm gear and drives the balance wheel, which in turn drives the power output shaft to a predetermined position. In this mechanism, the balance wheel is mounted on the power output shaft, which is parallel to the worm gear's rotation axis, rather than coaxially. This results in a less than compact structure, and the power output shaft's rotation angle range is set and cannot be adjusted. Utility Model Content

[0004] The purpose of the utility model is to provide a transmission mechanism for a switch operating mechanism of a novel structure, which has a compact structure and can meet the requirement of driving an output shaft to rotate according to a set angle.

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

[0006] The transmission mechanism of the switch operating mechanism includes a worm and a worm wheel. A main shaft is rotatably mounted on the worm wheel. A driving member is provided on the lower end surface of the worm wheel. A push plate is fixed on the main shaft. The driving member is used to push the push plate to rotate. A driving gear is provided on the main shaft for driving an output shaft arranged parallel to the main shaft.

[0007] Furthermore, the driving member is eccentrically arranged, and a driving groove is provided on one side of the outer circumference of the push plate, and the driving groove and the driving member are in bidirectional transmission cooperation.

[0008] Furthermore, a stop protrusion is provided on the other side of the outer circumference of the push plate, which is used to stop and cooperate with the limiting structure after rotating to a certain angle.

[0009] Furthermore, the limiting structure includes a fixed seat and a limiting arm. One end of the limiting arm is rotatably assembled on the main shaft, and the other end is provided with a limiting portion for cooperating with the stop cam. The fixed seat is used to limit the rotation angle of the other end of the limiting arm.

[0010] Furthermore, an adjusting bolt is provided on the fixing seat, and one end of the adjusting bolt is used to limit the other end of the limiting arm.

[0011] Furthermore, the driving member and the limiting portion are both hexagon socket head bolts.

[0012] Furthermore, the output shaft is provided with an output gear, which is engaged with the driving gear.

[0013] Furthermore, a worm gear is provided at one end of the worm, the worm gear is engaged with a motor gear, the motor gear is located on the motor output shaft, and the motor output shaft is arranged parallel to the worm.

[0014] Beneficial effects of the utility model:

[0015] When the switch operating mechanism of the present invention is in operation, the power output by the motor is transmitted sequentially through the motor gear, worm gear, worm, and worm wheel. When the worm wheel rotates, the driving member provided on its lower side drives the push plate to rotate. The main shaft rotates synchronously with the push plate. After the main shaft rotates through a set angle, it will be limited. During the main shaft rotation process, the main shaft drives the output shaft to rotate according to the set angle through the gear transmission and outputs the set torque. In the present utility model, the push plate and worm wheel are both coaxially arranged with the main shaft, while the main shaft and worm wheel rotate asynchronously. The worm wheel drives the main shaft to rotate through the push plate, which makes the structural layout more compact.

[0016] Furthermore, a limiting structure is used to limit the rotation angle range of the push plate, and a limiting bolt with an adjustable limit point is designed in the limiting structure, so that the rotation angle range of the push plate is adjustable, the adaptability is better, and the final rotation angle accuracy of the output shaft can be better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural diagram of the transmission mechanism used in the switch operating mechanism of the utility model;

[0018] Figure 2 This is a front view of the transmission mechanism for the switch operating mechanism of the utility model;

[0019] Figure 3 It is a top view of the cooperation between the motor and the worm gear mechanism in the transmission mechanism of the switch operating mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the coordination between the worm gear, push plate and main shaft;

[0021] Figure 5 It is a schematic diagram of the cooperation between the push plate and the limit structure;

[0022] Figure 6 This is a view of the cooperation between the push plate and the limiting part in the limiting structure.

[0023] 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 slot; 102. Stop cam; 11. Driving member; 12. Motor. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiments of the present utility model:

[0026] This embodiment describes a portion of the switch operating mechanism, focusing on the transmission portion, which ultimately causes the output shaft to operate according to the set output torque and rotation angle.

[0027] like Figure 1-Figure 3 As shown, the switch operating mechanism uses a transmission mechanism comprising a worm 3 and a worm wheel 4, on which a main shaft 5 is rotatably mounted. Worm gear 2 is provided at one end of worm 3, meshing with motor gear 1. Motor gear 1 is located on the motor shaft of motor 12, which is arranged parallel to worm 3. The worm gear 2 and motor gear 1 are used to distinguish between gears; both are spur gears.

[0028] like Figure 4 As shown, the lower end surface of the worm gear 4 is provided with a drive member 11. This drive member 11 is eccentrically positioned. In this embodiment, the drive member 11 is a hexagon socket head bolt connected to the worm gear 4, utilizing its cylindrical head as the drive portion. This provides a stable structure and convenient installation. In other embodiments, a cylinder welded to the lower end surface of the worm gear can also serve as the drive member. A push plate 10 is fixed to the main shaft 5, and the drive member 11 is used to drive the push plate 10 for rotation. The push plate 10 is assembled to the main shaft 5 by a key. To increase the connection strength, a double parallel key connection can be used.

[0029] A drive slot 101 is provided on one side of the outer periphery of the push plate 10. This slot runs through the thickness of the push plate 10 and has an arc-shaped bottom. The length of the slot 101 is greater than the outer diameter of the cylindrical head of the hexagon socket head bolt. The slot 101 and the drive member 11 provide a bidirectional transmission, allowing the push plate to rotate in both the forward and reverse directions. The spindle 5 and worm gear 4 are rotatably assembled via bearings, meaning the spindle 5 and worm gear 4 rotate asynchronously. When the worm gear 4 rotates, it drives the push plate 10 via the drive member 11, which in turn drives the spindle 5.

[0030] like Figures 4 to 6 As shown, a stop protrusion 102 is provided on the other side of the outer periphery of the push plate 10 for engaging with the limiting structure 6 after rotating to a certain angle.

[0031] like Figure 5 and 6 As shown, 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. The other end of the limiting arm 63 is provided with a limiting portion 64, 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 limiting portion 64, so that the other end of the limiting arm 63 is close to the fixed seat 61, thereby achieving the purpose of limiting.

[0032] The fixing seat 61 is a U-shaped structure, with an adjusting bolt 62 at each end. One end (inner end) of the adjusting bolt 62 is used to limit the other end of the limiting arm 63. A stud and nut can also be used to adjust the axial distance, limit the rotation angle of the other end of the limiting arm 63, and achieve an adjustable rotation angle range. The push plate 10 can achieve the purpose of limiting the position by rotating it in the forward and reverse directions. Figure 5 Shown mating with the adjusting bolt on the right.

[0033] Figure 1 As shown, a driving gear 7 is provided on the main shaft 5, which drives an output shaft 9 arranged parallel to the main shaft 5. The driving gear 7 is connected to the main shaft 5 via a double parallel key. An output gear 8 is provided on the output shaft 9, which meshes with the driving gear 7. The driving gear 7 and the output gear 8 are used to distinguish gears at different positions. The output gear 8, or the driven gear, is a spur gear. In this embodiment, the diameter of the output gear 8 is smaller than that of the driving gear 7.

[0034] The switch operating mechanism of the present invention uses a transmission mechanism. The power output by the motor 12 is transmitted in sequence through the motor gear 1, the worm gear 2, the worm 3, and the worm wheel 4. When the worm wheel 4 rotates, the driving member 11 provided on its lower side drives the push plate 10 to rotate. 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 portion 64 in the limit structure 6. The end of the limit arm 63 where the limit portion 64 is located 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 isolating switch body. By rotating forward or reverse, the isolating switch performs the closing or opening action.

Claims

1. A transmission mechanism for a switch operating mechanism, characterized in that: It includes a worm and a worm wheel. A main shaft is rotatably mounted on the worm wheel. A driving member is provided on the lower end face of the worm wheel. A push plate is fixed on the main shaft. The driving member is used to push the push plate to rotate. A driving gear is provided on the main shaft for driving an output shaft arranged parallel to the main shaft.

2. The transmission mechanism for a switch operating mechanism according to claim 1, characterized in that: The driving member is eccentrically arranged, and a driving groove is provided on one side of the outer circumference of the push plate. The driving groove and the driving member are in bidirectional transmission cooperation.

3. The transmission mechanism for a switch operating mechanism according to claim 2, characterized in that: A stop cam is provided on the other side of the outer circumference of the push plate, which is used to stop and cooperate with the limiting structure after rotating to a certain angle.

4. The transmission mechanism for a switch operating mechanism according to claim 3, characterized in that: The limiting structure includes a fixing seat and a limiting arm. One end of the limiting arm is rotatably assembled on the main shaft, and the other end is provided with a limiting portion for cooperating with the stop cam. The fixing seat is used to limit the rotation angle of the other end of the limiting arm.

5. The transmission mechanism for a switch operating mechanism according to claim 4, characterized in that: An adjusting bolt is provided on the fixing seat, and one end of the adjusting bolt is used to limit the other end of the limiting arm.

6. The transmission mechanism for a switch operating mechanism according to claim 4, characterized in that: The driving member and the limiting portion both adopt hexagon socket head bolts.

7. The transmission mechanism for a switch operating mechanism according to any one of claims 1 to 6, characterized in that: An output gear is provided on the output shaft, and the output gear is meshed with the driving gear.

8. The transmission mechanism for a switch operating mechanism according to any one of claims 1 to 6, characterized in that: A worm gear is provided at one end of the worm, and the worm gear is meshed with a motor gear. The motor gear is located on a motor shaft, and the motor shaft is arranged parallel to the worm.

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