Operating wrench for manual opening mechanism
By designing an operating wrench with a one-way limit switch, the problem of the circuit breaker being closed easily due to the manual tripping mechanism wrench was solved, ensuring the accuracy and safety of operation and improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING CREATIVE DISTRIBUTION AUTOMATION
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-17
AI Technical Summary
The existing manual tripping mechanism wrench is prone to causing the circuit breaker to close due to incorrect rotation direction, resulting in inconvenient operation, time and labor costs, and safety hazards.
An operating wrench including a drive handle and a rotating shaft is designed. The rotating shaft is provided with a one-way limit part, which allows rotation only in one direction. By cooperating with the locking shaft of the manual tripping mechanism, it ensures that the main shaft rotates only in the correct direction.
This ensures accurate and safe operation, avoids misoperation when closing the circuit breaker, and improves the convenience and safety of operation.
Smart Images
Figure CN224138087U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ring main unit technology, and in particular to an operating wrench for a manual tripping mechanism. Background Technology
[0002] In recent years, permanent magnet holding and electronic control electromagnetic operating mechanisms (referred to as permanent magnet mechanisms) used in vacuum circuit breakers have attracted much attention. Permanent magnet mechanisms achieve all the functions of a circuit breaker operating mechanism through a special combination of an electromagnetic mechanism and a permanent magnet. They eliminate the need for traditional tripping and locking devices to maintain the mechanism's final position, significantly reducing the number of parts and achieving high mechanical reliability. Due to the fewer moving parts and intermediate switching and connecting mechanisms, permanent magnet mechanisms greatly reduce the dispersion and uncontrollability of operating time, providing a material basis for intelligent operation of circuit breakers. Based on these advantages, permanent magnet mechanism ring main unit products are also widely used in the power distribution field, offering safe and reliable operation.
[0003] Permanent magnet ring main unit products require the use of a manual tripping mechanism. Existing manual tripping mechanisms are generally operated by clamping with an existing wrench and then rotating, which is prone to slippage, makes operation difficult, and is time-consuming and labor-intensive. In addition, it is easy to cause the circuit breaker to close due to incorrect rotation direction, which may lead to safety accidents. Utility Model Content
[0004] The purpose of this invention is to provide an operating wrench for a manual tripping mechanism to solve the problem in the prior art where the wrench may close the circuit breaker due to incorrect rotation direction. The operating wrench of this invention can only rotate in one direction to drive the main shaft to rotate, avoiding operational errors that could close the circuit breaker, and ensuring the accuracy and safety of the operation.
[0005] This utility model provides an operating wrench for a manual tripping mechanism, including a drive handle and a rotating shaft. The drive handle is perpendicularly connected to the rotating shaft. One end of the rotating shaft is provided with a sleeve with an end opening. A one-way limiting part is provided at the open end of the sleeve. The one-way limiting part can cooperate with the locking shaft on the manual tripping mechanism and enable the rotating shaft to drive the main shaft on the manual tripping mechanism to rotate only in a first direction.
[0006] As a preferred embodiment of this utility model, the unidirectional limiting part is an oblique notch, which is disposed on the opposite side walls of the sleeve, and the oblique notch is inclined in the opposite direction to the first direction.
[0007] As a preferred embodiment of the present invention, the oblique notch includes an arc-shaped receiving portion, a first oblique side and a second oblique side, the first oblique side and the second oblique side being smoothly connected to both sides of the arc-shaped receiving portion, and the first oblique side and the second oblique side being inclined around the sleeve to the side away from the first direction and extending to the end of the sleeve.
[0008] In a preferred embodiment of this utility model, the first inclined side is disposed in front of the second inclined side in the first direction, the length of the second inclined side is greater than the length of the first inclined side, and the angle α between the second inclined side and the radial surface of the sleeve is less than the angle β between the first inclined side and the radial surface of the sleeve.
[0009] As a preferred embodiment of this utility model, the rotating shaft includes a connecting shaft and a first bushing. The one-way limiting part is disposed on the first bushing at one end away from the connecting shaft. The first bushing is coaxially connected to one end of the connecting shaft through a buffer connecting mechanism. The connecting shaft can drive the first bushing to rotate synchronously in a first direction through the buffer connecting mechanism. After the first bushing rotates at a certain angle in the first direction, it drives the connecting shaft to rotate.
[0010] As a preferred embodiment of the present invention, the first bushing is sleeved on the outside of the connecting shaft, and the buffer connection mechanism includes a limiting bolt and a sliding hole provided on the first bushing. The sliding hole is provided on the first bushing at one end away from the one-way limiting part and is arranged along the circumference of the first bushing. One end of the limiting bolt is locked on the outside of the first bushing and the other end passes through the sliding hole and is inserted into the connecting shaft.
[0011] In a preferred embodiment of this utility model, the length of the drive handle is greater than the length of the connecting shaft.
[0012] As a preferred embodiment of the present invention, it further includes a second bushing, which is coaxially connected to the end of the connecting shaft away from the first bushing via a buffer connection mechanism, and the second bushing has a regular hexagonal hole inside.
[0013] In a preferred embodiment of this utility model, the drive handle is vertically connected to the middle of the connecting shaft.
[0014] In a preferred embodiment of this utility model, a connecting hole is provided in the middle of the connecting shaft, and the drive handle passes through the connecting hole.
[0015] Compared with the prior art, the present invention has the following positive effects:
[0016] This utility model provides an operating wrench for a manual tripping mechanism, comprising a drive handle and a rotating shaft. The drive handle is perpendicularly connected to the rotating shaft. One end of the rotating shaft is provided with a sleeve with an end opening. A one-way limiting part is provided at the open end of the sleeve. The one-way limiting part can cooperate with a retaining pin on the manual tripping mechanism, allowing the rotating shaft to drive the main shaft on the manual tripping mechanism to rotate only in a first direction. In use, the operating wrench of this utility model, through the cooperation of the one-way limiting part with the retaining pin on the manual tripping mechanism, and then through the drive handle, can drive the rotating shaft and the main shaft on the manual tripping mechanism to rotate synchronously in the first direction, thereby tripping the circuit breaker. Furthermore, the rotating shaft cannot drive the main shaft on the manual tripping mechanism to rotate in the opposite direction, thus avoiding accidental closing of the circuit breaker and ensuring the accuracy and safety of the operation. Attached Figure Description
[0017] 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a first-view structural schematic diagram of the operating wrench for the manual tripping mechanism of this utility model.
[0019] Figure 2 This is a structural schematic diagram of the operating wrench for the manual tripping mechanism of this utility model from a second perspective.
[0020] Figure 3 This is a front view of the operating wrench for the manual tripping mechanism of this utility model;
[0021] Figure 4 for Figure 3 A magnified view of part A in the image;
[0022] Figure 5 This is a schematic diagram of the structure of the operating wrench of this utility model when used on a manual tripping mechanism;
[0023] Figure 6 A schematic diagram of the first embodiment of the manual tripping mechanism;
[0024] Figure 7 This is a schematic diagram of the second implementation of the manual tripping mechanism.
[0025] In the diagram: 1. Drive handle; 2. Rotating shaft; 21. Connecting shaft; 211. Connecting through hole; 22. First bushing; 221. Sliding hole; 222. Slanted notch; 223. Arc-shaped receiving part; 224. First inclined side; 225. Second inclined side; 23. Second bushing; 3. Limit bolt; 4. Manual tripping mechanism; 41. Main shaft; 42. Locking shaft; 43. Hexagonal connecting shaft. Detailed Implementation
[0026] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0029] Example 1:
[0030] This embodiment provides an operating wrench for a manual tripping mechanism, such as... Figures 1-7 As shown, it includes a drive handle 1 and a rotating shaft 2, with the drive handle 1 perpendicularly connected to the rotating shaft 2. The drive handle 1 can be threaded or welded to the middle of the rotating shaft 2. Both the drive handle 1 and the rotating shaft 2 are made of metal and have good load-bearing strength.
[0031] By setting the drive handle 1 to be vertically connected to the rotating shaft 2, it is easier to operate and use when rotating the drive handle 1 by hand, which requires less effort.
[0032] One end of the rotating shaft 2 is provided with a sleeve with an end opening. The rotating shaft 2 can also be a single hollow tubular structure. A one-way limiting part is provided at the open end of the sleeve. The one-way limiting part can cooperate with the locking shaft 42 on the manual tripping mechanism 4, allowing the rotating shaft 2 to drive the main shaft 41 on the manual tripping mechanism 4 to rotate only in the first direction x. That is, if the rotating shaft 2 rotates in the opposite direction, it cannot drive the main shaft 41 to rotate in the opposite direction to the first direction x. The first direction x can be the counterclockwise rotation of the rotating shaft 2 when it is connected to the main shaft 41.
[0033] In this embodiment, when the operating wrench is in use, it cooperates with the locking shaft 42 on the manual tripping mechanism 4 through the one-way limiting part, and then the driving handle 1 can drive the rotating shaft 2 and the main shaft 41 on the manual tripping mechanism 4 to rotate synchronously in the first direction x, thereby tripping the circuit breaker; and the rotating shaft 2 cannot drive the main shaft 41 on the manual tripping mechanism 4 to rotate in the opposite direction, thereby avoiding operation errors that would close the circuit breaker, ensuring the accuracy and safety of the operation.
[0034] As a preferred embodiment, such as Figure 1 and Figure 3 As shown, the unidirectional limiting part is a slanted notch 222, which is provided on the opposite side walls of the bushing. The slanted notch 222 is inclined in the opposite direction to the first direction x. The slanted notch 222 is adapted to the locking shaft 42 on the manual tripping mechanism 4.
[0035] When using, such as Figure 5 As shown, the sleeve at the end of the rotating shaft 2 is fitted onto the main shaft 41, and the retaining shaft 42 is engaged in the oblique notch 222. Since the inclination direction of the oblique notch 222 is opposite to the first direction x, when the rotating shaft 2 rotates along the first direction x, the retaining shaft 42 can be engaged on the upper side of the oblique notch 222. When the rotating shaft 2 rotates in the opposite direction to the first direction x, the retaining shaft 42 can slide out of the oblique notch 222, thereby realizing unidirectional rotation.
[0036] As a preferred embodiment, such as Figure 4 As shown, the oblique notch 222 includes an arc-shaped receiving portion 223, a first oblique side 224 and a second oblique side 225. The curvature of the arc-shaped receiving portion 223 is adapted to the locking shaft 42. When the locking shaft 42 is locked in the oblique notch 222, the locking shaft 42 is locked in the arc-shaped receiving portion 223.
[0037] The first inclined side 224 and the second inclined side 225 are smoothly connected to both sides of the arc-shaped receiving portion 223, so that the retaining shaft 42 can smoothly slide into or out of the inclined notch 222. The first inclined side 224 and the second inclined side 225 are respectively inclined around the sleeve to the side opposite to the first direction and extended to the end of the sleeve.
[0038] Specifically, such as Figure 4As shown, the radial projections of the arc-shaped receiving portions 223 on the opposite side walls of the sleeve are arranged on the same circle, so that the two retaining shafts 42 on opposite sides of the main shaft 41 can be inserted.
[0039] As a preferred embodiment, such as Figure 4 As shown, in the first direction x, the first inclined side 224 is positioned in front of the second inclined side 225. The length of the second inclined side 225 is greater than the length of the first inclined side 224. The angle α between the second inclined side 225 and the radial surface of the sleeve is less than the angle β between the first inclined side 224 and the radial surface of the sleeve. When both the angle α between the second inclined side 225 and the radial surface of the sleeve and the angle β between the first inclined side 224 and the radial surface of the sleeve are acute angles, α is less than β.
[0040] When the rotating shaft 2 rotates in the first direction x, the retaining shaft 42 is locked in the arc-shaped receiving part 223 due to the limiting effect; when the rotating shaft 2 rotates in the opposite direction to the first direction x, the retaining shaft 42 slides out of the oblique notch 222 along the second inclined side 225, thereby realizing that the rotating shaft 2 can only drive the main shaft 41 to rotate in the first direction x.
[0041] In one preferred embodiment, the rotating shaft 2 includes a connecting shaft 21 and a first bushing 22, with a one-way limiting part disposed on one end of the first bushing 22 opposite to the connecting shaft 21. The first bushing 22 is coaxially connected to one end of the connecting shaft 21 via a buffer connecting mechanism. The connecting shaft 21 can drive the first bushing 22 to rotate synchronously in the first direction x via the buffer connecting mechanism. After the first bushing 22 rotates a certain angle in the first direction x, it drives the connecting shaft 21 to rotate.
[0042] The buffer connection mechanism in this embodiment serves as an over-position protection mechanism. When the manual tripping mechanism has passed the tripping position, the main shaft 41 continues to move in the first direction x at a relatively high speed. At this time, the rotation speed of the operator holding the drive handle 1 is less than the rotation speed of the main shaft 41. If the first bushing 22 is fixed to the connecting shaft 21, the main shaft 41 will drive the first bushing 22 and the connecting shaft 21 to rotate synchronously, causing the drive handle 1 to continue to move and rotate at a relatively high speed. On the one hand, the drive handle 1 may hit the operator; on the other hand, the operator will limit the rapid movement of the operating wrench, resulting in a decrease in the tripping speed. In this embodiment, by setting a buffer connection mechanism, when the main shaft 41 drives the first bushing 22 to rotate after the tripping position, the first bushing 22 will not synchronously drive the connecting shaft 21 to rotate, thereby providing a buffered rotation angle, thus avoiding accidental injury to the operator by the drive handle 1 and avoiding affecting the tripping speed. As a preferred embodiment, the first bushing 22 is sleeved on the outside of the connecting shaft 21, and the buffer connection mechanism includes a limiting bolt 3 and a sliding hole 221 provided on the first bushing 22. A sliding hole 221 is located on the first bushing 22 at one end away from the one-way limiting part and is arranged circumferentially along the first bushing 22. The length of the sliding hole 221 in the circumferential direction of the first bushing 22 is greater than half of its circumference, so that the first bushing 22 can only drive the connecting shaft 21 to rotate after rotating at least 180°. One end of the limiting bolt 3 is engaged with the outside of the first bushing 22, and the other end passes through the sliding hole 221 and is inserted into the connecting shaft 21. It should be noted that the tail end of the limiting bolt 3 cannot protrude out of the connecting shaft 21 to avoid obstructing the sliding of the limiting bolt 3 in the sliding hole 221. As a preferred embodiment, the length of the drive handle 1 is greater than the length of the connecting shaft 21. This makes it easier to hold and requires less effort.
[0043] As a preferred embodiment, such as Figure 5 As shown, the operating wrench in this embodiment also includes a second bushing 23. The second bushing 23 is coaxially connected to the end of the connecting shaft 21 away from the first bushing 22 through a buffer connection mechanism. The second bushing 23 has a regular hexagonal hole inside.
[0044] When the spindle is connected to a hexagonal connecting shaft 43, the second bushing 23 can be fitted onto the hexagonal connecting shaft 43, and the drive handle 1 can be pushed to drive the connecting shaft 21, the second bushing 23 and the spindle to rotate synchronously.
[0045] The second bushing 23 is connected to the connecting shaft 21 through a buffer connection mechanism, which can also achieve the buffering effect of the rapid rotation of the main shaft 41 on the drive handle 1.
[0046] In one preferred embodiment, the drive handle 1 is vertically connected to the middle of the connecting shaft 21, so that the force on the wrench is more even when in use.
[0047] In a preferred embodiment, a connecting hole 211 is provided in the middle of the connecting shaft 21, and the drive handle 1 is disposed through the connecting hole 211. The drive handle 1 and the connecting shaft 21 are connected through the connecting hole 211, resulting in a more reliable connection and better load-bearing strength.
[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any modifications and improvements made by those skilled in the art without departing from the inventive concept of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. An operating wrench for a manual tripping mechanism, characterized in that, It includes a drive handle (1) and a rotating shaft (2). The drive handle (1) is perpendicularly connected to the rotating shaft (2). One end of the rotating shaft (2) is provided with a sleeve with an end opening. A one-way limiting part is provided at the opening end of the sleeve. The one-way limiting part can cooperate with the locking shaft (42) on the manual opening mechanism (4) and enable the rotating shaft (2) to drive the main shaft (41) on the manual opening mechanism (4) to rotate only in the first direction.
2. The operating wrench for a manual tripping mechanism according to claim 1, characterized in that, The unidirectional limiting part is an oblique notch (222), which is provided on the opposite side walls of the sleeve. The oblique notch (222) is inclined in the opposite direction to the first direction.
3. The operating wrench for a manual tripping mechanism according to claim 2, characterized in that, The oblique notch (222) includes an arc-shaped receiving portion (223), a first oblique side (224), and a second oblique side (225). The first oblique side (224) and the second oblique side (225) are smoothly connected to both sides of the arc-shaped receiving portion (223). The first oblique side (224) and the second oblique side (225) are respectively inclined around the sleeve to the side away from the first direction and extended to the end of the sleeve.
4. The operating wrench for a manual tripping mechanism according to claim 3, characterized in that, In the first direction, the first inclined side (224) is disposed in front of the second inclined side (225), the length of the second inclined side (225) is greater than the length of the first inclined side (224), and the angle α between the second inclined side (225) and the radial surface of the sleeve is less than the angle β between the first inclined side (224) and the radial surface of the sleeve.
5. The operating wrench for a manual tripping mechanism according to claim 1, characterized in that, The rotating shaft (2) includes a connecting shaft (21) and a first bushing (22). The one-way limiting part is disposed on the first bushing (22) at one end away from the connecting shaft (21). The first bushing (22) is coaxially connected to one end of the connecting shaft (21) through a buffer connecting mechanism. The connecting shaft (21) can drive the first bushing (22) to rotate synchronously in a first direction through the buffer connecting mechanism. After the first bushing (22) rotates at a certain angle in the first direction, it drives the connecting shaft (21) to rotate.
6. The operating wrench for a manual tripping mechanism according to claim 5, characterized in that, The first bushing (22) is sleeved on the outside of the connecting shaft (21). The buffer connection mechanism includes a limiting bolt (3) and a sliding hole (221) provided on the first bushing (22). The sliding hole (221) is provided on the first bushing (22) at one end away from the one-way limiting part and is arranged along the circumference of the first bushing (22). One end of the limiting bolt (3) is stuck on the outside of the first bushing (22) and the other end passes through the sliding hole (221) and is inserted into the connecting shaft (21).
7. The operating wrench for a manual tripping mechanism according to claim 5, characterized in that, The length of the drive handle (1) is greater than the length of the connecting shaft (21).
8. The operating wrench for a manual tripping mechanism according to claim 5, characterized in that, It also includes a second bushing (23), which is coaxially connected to the end of the connecting shaft (21) away from the first bushing (22) through a buffer connection mechanism. The second bushing (23) has a regular hexagonal hole inside.
9. An operating wrench for a manual tripping mechanism according to claim 5, characterized in that, The drive handle (1) is vertically connected to the middle of the connecting shaft (21).
10. An operating wrench for a manual tripping mechanism according to claim 5, characterized in that, A connecting hole (211) is provided in the middle of the connecting shaft (21), and the drive handle (1) is disposed through the connecting hole (211).