Speed detection mechanism of switching characteristic tester

Abstract

The utility model discloses a speed detection mechanism of a switch characteristic tester, which belongs to the technical field of electrical detection and comprises a speed sensor mounted on the outer wall of a switch to be tested, the speed sensor comprises a fixed part and a movable part capable of axially sliding along the fixed part, and the movable part is free of a power source. The top end of the fixing part is provided with a connecting piece, the connecting piece is provided with a hoop, the hoop is fixed on a movable contact of a to-be-tested switch, the fixing part is also provided with a fixing structure, the fixing part is fixed with the outer wall of the to-be-tested switch through the fixing structure, the fixing structure comprises a mounting plate, the mounting plate is provided with a mounting hole, and the mounting hole is communicated with the mounting plate. The mounting plate is further in threaded connection with a positioning bolt, a U-shaped clamp is arranged on the positioning bolt, and the fixing part is fixed to the mounting plate through the U-shaped clamp; the speed detection mechanism of the switching characteristic tester realizes accurate measurement of the speed of the movable contact of the circuit breaker through a mechanical linkage structure and electrical signal transmission.

Description

A speed detection mechanism for a switch characteristic tester Technical Field

[0001] This utility model specifically relates to a speed detection mechanism for a switch characteristic tester, belonging to the field of electrical testing technology. Background Technology

[0002] In circuit breaker performance testing, detecting the moving speed of the switch's moving contact is a crucial indicator for evaluating circuit breaker performance. Current technology typically uses a speed sensor, similar in shape to an electric actuator, to detect this speed. The sensor's rod is fixedly connected to the switch's moving contact, and the switching speed is calculated by recording the time taken for the moving contact to travel from its initial position to its closed position. Currently, the speed sensor's base is connected to the circuit breaker using a magnetic attraction method. However, since most components in a circuit breaker are made of copper, magnetic attraction is insufficient for secure attachment, requiring additional fixing operations. This not only increases installation steps and workload but also makes the sensor prone to loosening during use, affecting the accuracy and stability of the detection and causing significant inconvenience in practical applications. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a speed detection mechanism for a switch characteristic tester, which achieves accurate measurement of the moving contact speed of a circuit breaker through a mechanical linkage structure and electrical signal transmission.

[0004] A speed detection mechanism for a switch characteristic tester includes a speed sensor mounted on the outer wall of the switch under test. The speed sensor includes a fixed part and a movable part that can slide axially along the fixed part. The movable part has no power source and a connector is provided at its top. A clamp is provided on the connector and is fixed to the moving contact of the switch under test. A fixing structure is also provided on the fixed part, and the fixed part is fixed to the outer wall of the switch under test through the fixing structure. The fixing structure includes a mounting plate with mounting holes. A positioning bolt is threaded onto the mounting plate, and a U-shaped clip is provided on the positioning bolt. The fixed part is fixed to the mounting plate through the U-shaped clip.

[0005] Furthermore, the connector includes a first connecting plate with a straight slot, the movable part passing through the inside of the straight slot, and a nut threadedly connected to the top of the movable part. The nut is located on the top surface of the first connecting plate, and a second connecting plate is connected to the top surface of the first connecting plate. A threaded rod is fixed on the second connecting plate, and the clamp is connected to one end of the threaded rod.

[0006] Furthermore, the inner wall of the nut is integrally formed with an internal thread, and the outer wall of the upper part of the movable part is provided with an external thread that matches the internal thread.

[0007] Furthermore, the clamp includes a first clamp plate connected to one end of the threaded rod, and a second clamp plate is rotatably mounted on the first clamp plate. The first clamp plate and the second clamp plate are spliced ​​together along the circumference of the moving contact of the switch to be tested to form a ring structure to fit the outer surface of the moving contact of the switch to be tested.

[0008] Furthermore, a locking plate is connected to both the first and second clamping plates, and a locking bolt is connected to the locking plate. The first and second clamping plates are fixed together by the locking plate and the locking bolt.

[0009] Furthermore, the first connecting plate and the movable part are arranged horizontally, and the second connecting plate is perpendicular to the top surface of the first connecting plate.

[0010] Furthermore, a threaded sleeve is fixedly provided on the side wall of the first clamping plate, and one end of the threaded rod is threadedly connected to the inside of the threaded sleeve.

[0011] Furthermore, the threaded rod is threaded with two nuts, and the second connecting plate is clamped and fixed to the threaded rod by the two nuts.

[0012] Furthermore, the fixing part is also provided with a power receiving part and a wire, and the power receiving part is electrically connected to the wire.

[0013] Beneficial effects:

[0014] 1. This utility model uses mechanical clamping instead of magnetic attraction. The combination of the mounting plate and the U-shaped clip ensures that the sensor is stable and does not loosen. The ring clamp tightly holds the moving contact, and the vertical and horizontal connecting plate structure reduces the force transmission deviation, so that the moving part accurately follows the movement of the moving contact, and the detection accuracy is significantly improved.

[0015] 2. This utility model features a fully threaded and clamping modular design, which makes the speed sensor easy and quick to install and disassemble, greatly shortening the operation time. At the same time, the rigid linkage clamp fits tightly with the moving contact, reducing lateral force interference and ensuring that the movement of the moving contact is synchronized with the sensor detection, effectively improving the accuracy and stability of speed detection. Attached Figure Description

[0016] Figure 1 is a front view structural diagram of this utility model;

[0017] Figure 2 is a schematic diagram of the rear view structure of this utility model;

[0018] Figure 3 is a front view of the structure of this utility model;

[0019] Figure 4 is a side view of the present invention.

[0020] In the diagram: 1. Mounting plate; 2. Mounting hole; 3. Fixing part; 4. Moving part; 5. Power connection part; 6. Wire; 7. U-shaped clip; 8. Positioning bolt; 9. First connecting plate; 10. Second connecting plate; 11. Straight groove; 12. Nut; 13. Threaded rod; 14. Nut; 15. First clamping plate; 16. Second clamping plate; 17. Locking plate; 18. Locking bolt; 19. Threaded sleeve. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4. A speed detection mechanism for a switch characteristic tester includes a speed sensor mounted on the outer wall of the switch to be tested. The speed sensor includes a fixed part 3 and a movable part 4 that can slide along the axial direction of the fixed part 3. The movable part 4 has no power source and a connector is provided at its top. A clamp is provided on the connector and is fixed to the moving contact of the switch to be tested. The fixed part 3 is also provided with a fixing structure. The fixed part 3 is fixed to the outer wall of the switch to be tested through the fixing structure. The fixing structure includes a mounting plate 1. The mounting plate 1 has mounting holes 2 and a positioning bolt 8 is threaded onto the mounting plate 1. A U-shaped clip 7 is provided on the positioning bolt 8. The fixed part 3 is fixed to the mounting plate 1 through the U-shaped clip 7.

[0023] Specifically, the speed sensor in the speed detection mechanism includes a fixed part 3 and a movable part 4. The fixed part 3 is connected to the outer wall of the switch under test via a fixing structure. The mounting plate 1 of the fixing structure is fixed to the outer wall of the switch using bolts or other connectors through the mounting holes 2 for positioning. The positioning bolt 8 cooperates with the U-shaped clip 7. When the positioning bolt 8 is tightened, the U-shaped clip 7 can firmly clamp the fixed part 3 onto the mounting plate 1, achieving a stable installation. The movable part 4 has no power source. The clamp on the connector at its top is fixed to the moving contact of the switch under test. When the moving contact moves, it drives the movable part 4 to slide axially along the fixed part 3, thereby realizing the detection of the movement of the moving contact. This changes the problem of the traditional magnetic attraction connection being unstable. The mechanical fixing structure composed of the mounting plate 1, the positioning bolt 8, and the U-shaped clip 7 can reliably fix the speed sensor to the outer wall of the switch, avoiding the impact of loosening on the detection accuracy. The design of the mounting holes 2 facilitates positioning and installation according to the installation requirements of different switch outer walls, improving the installation flexibility. This fixing method does not require additional auxiliary fixing, simplifies the installation process, and reduces the installation workload.

[0024] As a technical optimization of this utility model, the connector includes a first connecting plate 9, a straight groove 11 is provided on the first connecting plate 9, a movable part 4 is inserted into the straight groove 11, a nut 12 is threadedly connected to the top of the movable part 4, the nut 12 is located on the top surface of the first connecting plate 9, a second connecting plate 10 is connected to the top surface of the first connecting plate 9, a threaded rod 13 is fixed on the second connecting plate 10, and a clamp is connected to one end of the threaded rod 13.

[0025] Specifically, the design of the straight groove 11 and the nut 12 allows the installation height of the first connecting plate 9 on the movable part 4 to be adjusted, which can accommodate moving contacts in different positions and improve the versatility of the detection mechanism; the structural design of the first connecting plate 9 and the second connecting plate 10 being perpendicular to each other ensures the stability of the force transmission path, so that the movement of the moving contact can be accurately transmitted to the movable part 4, reducing detection errors; the threaded rod 13 is easy to connect with the clamp, and the connection structure is simple, making it convenient to disassemble and maintain.

[0026] As a technical optimization of this utility model, the inner wall of the nut 12 is integrally formed with an internal thread, and the outer wall of the upper part of the movable part 4 is provided with an external thread that matches the internal thread.

[0027] Specifically, the threaded connection method is simple to operate, and the installation, disassembly and height adjustment of the first connecting plate 9 can be achieved quickly and easily; the threaded fit provides a reliable fastening force, which can ensure that the first connecting plate 9 will not loosen on the moving part 4 when the moving contact operates frequently, thus ensuring the stability and accuracy of the detection.

[0028] As a technical optimization of this utility model, the clamp includes a first clamping plate 15 connected to one end of the threaded rod 13, and a second clamping plate 16 is rotatably mounted on the first clamping plate 15. The first clamping plate 15 and the second clamping plate 16 are spliced ​​together along the circumference of the moving contact of the switch to be tested to form a ring structure to fit the outer surface of the moving contact of the switch to be tested.

[0029] Specifically, the split rotating splicing design of the clamp allows it to adapt to moving contacts of different diameters, expanding the applicability of the testing mechanism; the ring structure can uniformly apply clamping force to the moving contact, ensuring that the clamp and the moving contact fit tightly, so that the movement of the moving contact can be accurately transmitted to the moving part 4, improving the testing accuracy.

[0030] As a technical optimization of this utility model, a locking plate 17 is connected to both the first clamping plate 15 and the second clamping plate 16. A locking bolt 18 is connected to the locking plate 17. The first clamping plate 15 and the second clamping plate 16 are fixed together by the locking plate 17 and the locking bolt 18.

[0031] Specifically, the fixing method is simple to operate, and the clamp can be quickly installed and removed from the moving contact without complicated tools; the locking plate 17 and the locking bolt 18 can provide a large tightening force to ensure that the clamp will not loosen or fall off during the movement of the moving contact, thus ensuring the reliability of the testing process; at the same time, it is easy to flexibly adjust and install according to the shape and size of different moving contacts.

[0032] As a technical optimization of this utility model, the first connecting plate 9 and the movable part 4 are arranged horizontally, and the second connecting plate 10 is perpendicular to the top surface of the first connecting plate 9.

[0033] Specifically, this design avoids unnecessary shaking or displacement of the moving part 4 due to deviation in the direction of force transmission, thereby reducing detection errors and improving detection accuracy. This structural design is simple and stable, enhancing the overall structural strength and reliability of the connector, and is able to withstand the impact and tension during the movement of the moving contact.

[0034] As a technical optimization of this utility model, a threaded sleeve 19 is fixedly provided on the side wall of the first clamping plate 15, and one end of the threaded rod 13 is threadedly connected to the inside of the threaded sleeve 19.

[0035] Specifically, the threaded connection facilitates the installation and removal of the clamp, making it convenient for maintenance and replacement; it also allows for flexible adjustment of the clamp's position and angle according to the installation requirements of different moving contacts, ensuring a tight fit between the clamp and the moving contact, and improving the adaptability and accuracy of the testing mechanism.

[0036] As a technical optimization of this utility model, the threaded rod 13 is threaded with two nuts 14, and the second connecting plate 10 is clamped and fixed on the threaded rod 13 by the two nuts 14.

[0037] Specifically, it facilitates fine-tuning of the position and angle of the second connecting plate 10 to adapt to the installation requirements of different moving contacts, ensuring that the connection between the clamp and the moving contact is in the best state; the clamping method of the two nuts 14 provides a reliable fixing effect, preventing the second connecting plate 10 from sliding or rotating on the threaded rod 13, and ensuring the stability and accuracy of force transmission during the detection process.

[0038] As a technical optimization of this utility model, the fixing part 3 is also provided with a power receiving part 5 and a wire 6, and the power receiving part 5 and the wire 6 are electrically connected.

[0039] Specifically, the electrical connection between the speed sensor and external equipment is realized, ensuring that the sensor can work normally and output detection data; the standardized design of the power connection part 5 and the wire 6 facilitates connection with different models of switch characteristic testers, improving the versatility and compatibility of the testing mechanism; the stable electrical connection can ensure the accuracy and reliability of signal transmission, avoiding the impact of signal interference or unstable transmission on the test results.

[0040] Working principle: When installing the speed sensor, the mounting plate 1 is first initially positioned and installed on the outer wall of the switch to be tested using bolts and other fasteners through the mounting holes 2, ensuring that the mounting plate 1 is stably attached to the designated position on the outer wall of the switch. Then, the fixing part 3 is placed in a suitable position on the mounting plate 1. By rotating the positioning bolts 8, the U-shaped clips 7 are gradually tightened. The U-shaped clips 7 firmly clamp the fixing part 3 onto the mounting plate 1 from both sides, forming a strong rigid connection. This ensures that the fixing part 3 is stably fixed to the outer wall of the switch, providing a stable foundation for subsequent testing.

[0041] Moving contact linkage test: The connecting part at the top of the movable part 4 passes through the straight slot 11 of the first connecting plate 9. The internal thread of the nut 12 engages with the external thread on the upper part of the movable part 4. Rotating the nut 12 fixes the first connecting plate 9 at a suitable height at the top of the movable part 4. The top surface of the first connecting plate 9 is vertically connected to the second connecting plate 10. One end of the threaded rod 13 fixed on the second connecting plate 10 is connected to the clamp. The clamp consists of a first clamping plate 15 connected to one end of the threaded rod 13 and a second clamping plate 16 rotatably mounted on the first clamping plate 15. When installing the clamp, the first clamping plate 15 and the second clamping plate 16 are wrapped around the circumference of the moving contact of the switch to be tested, so that they are spliced ​​into a ring structure and fit against the outer surface of the moving contact. Then, the first clamping plate 15 and the second clamping plate 16 are fixed by the locking plate 17 and the locking bolt 18, so that the clamp is firmly fitted on the moving contact. When the moving contact of the switch is activated, the clamp moves synchronously with the moving contact. The clamp drives the threaded rod 13, the second connecting plate 10 and the first connecting plate 9, thereby pulling the movable part 4 to slide along the axial direction of the fixed part 3.

[0042] Signal Transmission and Calculation: A power receiving part 5 is provided on the fixed part 3, and the power receiving part 5 is electrically connected to the wire 6. When the movable part 4 slides on the fixed part 3, the displacement detection element integrated inside the fixed part 3, such as a displacement sensor, will detect the displacement change of the movable part 4 in real time. The power receiving part 5 connects to an external power source to provide the power required for the operation of the internal circuits such as the displacement detection element; on the other hand, it transmits the displacement signal of the movable part 4 detected by the displacement detection element to an external switch characteristic tester through the wire 6. After receiving the signal, the switch characteristic tester calculates relevant parameters such as the moving speed of the moving contact during the movement process from the initial position to the closed position, based on a preset algorithm and program, combined with the relationship between displacement and time, thereby completing the detection and evaluation of the circuit breaker performance.

[0043] Structural Adjustment: During installation, if different specifications of moving contacts or installation position requirements are encountered, the relevant structure can be adjusted. For example, by rotating the nut 12, the first connecting plate 9 can be moved up and down on the movable part 4, thereby adjusting the height of the clamp to adapt to moving contacts at different height positions; the two nuts 14 threaded on the threaded rod 13 can be tightened or loosened by tightening or loosening the nuts 14, realizing fine adjustment of the position and angle of the second connecting plate 10 on the threaded rod 13, so that the clamp can be better aligned with the moving contact; in addition, the threaded sleeve 19 on the side wall of the first clamping plate 15 is threadedly connected to the threaded rod 13, and the position and angle of the clamp in the horizontal direction can also be adjusted by rotating the threaded rod 13 to ensure that the clamp and the moving contact are tightly fitted and in the best detection state.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A speed detecting mechanism of a switch characteristic tester, comprising a speed sensor installed on the outer wall of a switch to be tested, characterized in that: The speed sensor includes a fixed part (3) and a movable part (4) that can slide along the axial direction of the fixed part (3). The movable part (4) has no power source and a connector is provided at its top. A clamp is provided on the connector and the clamp is fixed to the moving contact of the switch to be tested. A fixing structure is also provided on the fixed part (3). The fixed part (3) is fixed to the outer wall of the switch to be tested through the fixing structure. The fixing structure includes a mounting plate (1). A mounting hole (2) is provided on the mounting plate (1). A positioning bolt (8) is threaded on the mounting plate (1). A U-shaped clip (7) is provided on the positioning bolt (8). The fixed part (3) is fixed to the mounting plate (1) through the U-shaped clip (7).

2. The speed detecting mechanism of the switch characteristic tester according to claim 1, wherein: The connector includes a first connecting plate (9), on which a straight slot (11) is provided. The movable part (4) passes through the inside of the straight slot (11). The top of the movable part (4) is threaded with a nut (12). The nut (12) is located on the top surface of the first connecting plate (9). The top surface of the first connecting plate (9) is connected to a second connecting plate (10). A threaded rod (13) is fixed on the second connecting plate (10). The clamp is connected to one end of the threaded rod (13).

3. The speed detection mechanism of the switching characteristic tester as described in claim 2, characterized in that: The inner wall of the nut (12) is integrally formed with an internal thread, and the outer wall of the upper part of the movable part (4) is provided with an external thread that matches the internal thread.

4. The speed detecting mechanism of the switch characteristic tester according to claim 2, wherein: The clamp includes a first clamping plate (15) connected to one end of the threaded rod (13), and a second clamping plate (16) is rotatably mounted on the first clamping plate (15). The first clamping plate (15) and the second clamping plate (16) are spliced ​​together along the circumference of the moving contact of the switch to be tested to form a ring structure to fit the outer surface of the moving contact of the switch to be tested.

5. The speed detecting mechanism of the switch characteristic tester according to claim 4, wherein: A locking plate (17) is connected to both the first clamping plate (15) and the second clamping plate (16). A locking bolt (18) is connected to the locking plate (17). The first clamping plate (15) and the second clamping plate (16) are fixed together by the locking plate (17) and the locking bolt (18).

6. The speed detection mechanism of the switching characteristic tester as described in claim 2, characterized in that: The first connecting plate (9) and the movable part (4) are arranged horizontally, and the second connecting plate (10) is perpendicular to the top surface of the first connecting plate (9).

7. The speed detection mechanism of the switching characteristic tester as described in claim 4, characterized in that: A threaded sleeve (19) is fixedly provided on the side wall of the first clamping plate (15), and one end of the threaded rod (13) is threadedly connected to the inside of the threaded sleeve (19).

8. The speed detection mechanism of the switching characteristic tester as described in claim 2, characterized in that: The threaded rod (13) is threaded with two nuts (14), and the second connecting plate (10) is clamped and fixed to the threaded rod (13) by the two nuts (14).

9. The speed detection mechanism of the switching characteristic tester as described in claim 1, characterized in that: The fixing part (3) is also provided with a power receiving part (5) and a wire (6), and the power receiving part (5) and the wire (6) are electrically connected.

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