electroscope

Abstract

The application belongs to the technical field of electroscope, and discloses an electroscope device. The electroscope device comprises a shell, a conductive rod, two electroscope rods, a driving mechanism and an electroscope mechanism. The conductive rod is arranged inside the shell. A sliding groove is formed in the radial direction of the conductive rod at one end of the conductive rod. The two electroscope rods are both slidingly arranged in the sliding groove. At least part of the electroscope rods extends out of the shell. The driving mechanism comprises two driving assemblies. The two driving assemblies are both arranged in the shell. The output end of each driving assembly is connected with one electroscope rod. The two driving assemblies are used to drive the two electroscope rods to move closer to or away from each other in the radial direction of the conductive rod, so as to clamp or release the electric wire to be tested. The electroscope mechanism is arranged inside the shell. One end of the conductive rod away from the two electroscope rods is connected with the electroscope mechanism. The electroscope mechanism is used to detect whether the electric wire to be tested clamped by the two electroscope rods is electrified. The operation process is simplified. The clamping force is more uniform. The stability of clamping is improved. The accuracy and reliability of the electroscope result are ensured.

Description

Technical Field

[0001] This invention relates to the field of voltage detectors, and more particularly to voltage detector devices. Background Technology

[0002] A voltage detector is an instrument used to detect whether an object is charged. A traditional voltage detector consists of a metal ball and two metal foils connected to each other. When a charged object comes into contact with the metal ball, the charge is transferred to the metal foils, causing the two foils to become charged with the same type of charge. This causes them to repel each other and open at a certain angle, thus determining whether the object is charged. However, with this direct contact voltage detection method, the continuity of the voltage detection cannot be guaranteed when the operator's hand shakes, making it difficult to perform voltage detection stably for a long time.

[0003] Currently, in order to improve the stability of voltage testing devices during long-term voltage testing, clamps are installed on the devices. When using them, the clamps need to be opened manually, the wire to be tested is placed in the clamps, and then clamped. During operation, if the clamping force is insufficient or uneven, the wire to be tested may become loose or shift during the voltage testing process, thus affecting the voltage testing results.

[0004] Therefore, there is an urgent need for an electrical testing device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a voltage testing device that simplifies the operation process, improves the convenience of voltage testing, enhances the stability of the device when clamping the wire to be tested for a long time, improves the efficiency of voltage testing, and improves the accuracy of voltage testing results.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Electrical testing device, including:

[0008] case;

[0009] A conductive rod is disposed inside the housing, and a groove is formed at one end of the conductive rod along the radial direction of the conductive rod;

[0010] Two voltage testing rods are slidably disposed within the groove, with at least a portion of the voltage testing rods extending out of the housing;

[0011] The driving mechanism includes two driving components, both of which are disposed within the housing. The output end of each driving component is connected to one of the voltage testing rods. The two driving components are configured to drive the two voltage testing rods to move closer or further apart from each other along the radial direction of the conductive rod, so as to clamp or release the wire to be tested.

[0012] A voltage testing mechanism is disposed inside the housing. The end of the conductive rod away from the two voltage testing rods is connected to the voltage testing mechanism. The voltage testing mechanism is configured to detect whether the wire to be tested, which is held by the two voltage testing rods, is energized.

[0013] Preferably, the test rod includes a clamping section and an extension section. The clamping section is located outside the housing, and the extension section is located inside the housing. One end of the extension section is connected to the clamping section, and the other end is connected to the output end of the drive assembly. A limiting protrusion is provided at the end of the extension section away from the clamping section. The limiting protrusion is slidably disposed in the groove along the radial direction of the conductive rod.

[0014] Preferably, a limiting platform is provided at the connection between the clamping section and the extension section, and the limiting platform can abut against the end face of the housing.

[0015] Preferably, the radial width of the clamping segment gradually decreases from the direction close to the extension segment toward the direction away from the extension segment.

[0016] Preferably, the clamping segment includes a clamping surface, and both clamping surfaces of the two clamping segments are planar and parallel to each other.

[0017] Preferably, the drive component includes:

[0018] A drive unit, which is disposed within the housing;

[0019] A connector is slidably disposed on the inner wall of the housing. One end of the connector is connected to the output end of the drive unit, and the drive unit can drive the connector to reciprocate relative to the housing.

[0020] The push rod has its other end rotatably connected to the first end of the push rod, and its second end rotatably connected to the voltage testing rod.

[0021] Preferably, the voltage testing mechanism includes a foil voltage testing component and / or a multimeter voltage testing component, which are configured to detect whether the wire to be tested, held by the two voltage testing rods, is energized.

[0022] Preferably, the foil voltage detector assembly includes a resistor and a foil voltage detector, with one end of the resistor connected to the conductive rod and the other end connected to the foil voltage detector.

[0023] Preferably, the multimeter voltage testing assembly includes a lead wire group and a multimeter, with one end of the lead wire group electrically connected to the conductive rod and the other end electrically connected to the multimeter.

[0024] Preferably, the voltage testing device further includes a handheld tube, which is fitted onto the housing and is made of insulating material.

[0025] Beneficial effects:

[0026] The voltage testing device provided by this invention, in use, uses two driving components to move two voltage testing rods away from each other. The device is then brought close to the wire to be tested, and once the wire is positioned appropriately between the two rods, the two driving components drive the rods to move closer together to clamp the wire. The current in the wire is transmitted through the voltage testing rods and the conductive rod to the voltage testing mechanism, which detects the incoming current. Compared to traditional manual clamping methods, this device simplifies the operation process, makes the clamping force more uniform, and significantly improves clamping stability, thereby ensuring the accuracy and reliability of the voltage testing results. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the voltage testing device provided in an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the conductive rod provided in an embodiment of the present invention;

[0029] Figure 3 This is a cross-sectional view of the voltage testing mechanism provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 1. Shell; 11. Extension tube; 111. Opening; 12. Connecting tube; 121. Receiving cavity; 13. First shell; 14. Second shell; 15. Partition plate;

[0032] 2. Conductive rod; 21. Slide groove; 22. Mounting groove;

[0033] 3. Testing pole; 31. Clamping section; 311. Clamping surface; 32. Extension section; 33. Limiting platform;

[0034] 41. Foil voltage detector assembly; 411. Resistor; 412. Foil voltage detector;

[0035] 42. Multimeter voltage testing components; 421. Conductive sheet; 422. Wire; 423. Multimeter;

[0036] 5. Drive assembly; 51. Drive component; 52. Connector; 53. Push rod;

[0037] 61. Clamping switch; 62. Voltage tester switch; 7. Battery; 8. Indicator light; 9. Handheld flashlight. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0042] The voltage detection device provided in this embodiment, such as Figures 1-3As shown, the voltage testing device includes a housing 1, a conductive rod 2, two voltage testing rods 3, a drive mechanism, and a voltage testing mechanism. The conductive rod 2 is disposed inside the housing 1, and a groove 21 is formed at one end of the conductive rod 2 along the radial direction of the conductive rod 2. Both voltage testing rods 3 are slidably disposed in the groove 21, with at least a portion of the voltage testing rods 3 extending out of the housing 1. The drive mechanism includes two drive components 5, both of which are disposed inside the housing 1. The output end of each drive component 5 is connected to one voltage testing rod 3. The two drive components 5 are used to drive the two voltage testing rods 3 to move closer or further away from each other along the radial direction of the conductive rod 2, so as to clamp or release the wire to be tested. The voltage testing mechanism is disposed inside the housing 1, and the end of the conductive rod 2 away from the two voltage testing rods 3 is connected to the voltage testing mechanism. The voltage testing mechanism is used to detect whether the wire to be tested clamped by the two voltage testing rods 3 is energized.

[0043] In use, the two driving components 5 move the two voltage testing rods 3 away from each other. The voltage testing device is then brought close to the wire to be tested, and the wire is positioned appropriately between the two voltage testing rods 3. The two driving components 5 then drive the two voltage testing rods 3 to move closer together to clamp the wire. The current in the wire is transmitted to the voltage testing mechanism through the voltage testing rods 3 and the conductive rod 2. The voltage testing mechanism detects the incoming current. Compared to the traditional method of manual clamping, this voltage testing device simplifies the operation process, makes the clamping force more uniform, and greatly improves the stability of clamping, thereby ensuring the accuracy and reliability of the voltage testing results.

[0044] like Figures 1-2 As shown, the voltage testing rod 3 includes a clamping section 31 and an extension section 32. The clamping section 31 is located outside the housing 1, and the extension section 32 is located inside the housing 1. One end of the extension section 32 is connected to the clamping section 31, and the other end is connected to the output end of the drive assembly 5. A limiting protrusion is provided at the end of the extension section 32 away from the clamping section 31. The limiting protrusion is slidably disposed in the groove 21 along the radial direction of the conductive rod 2. On the one hand, the extension section 32 being located inside the housing 1 and connected to the drive assembly 5 can effectively protect the connection structure between the extension section 32 and the drive assembly 5, reduce interference from the external environment, and improve the stability and reliability of the connection between the voltage testing rod 3 and the drive assembly 5. On the other hand, the limiting protrusion on the extension section 32 helps the voltage testing rod 3 move along a predetermined radial trajectory in the groove 21 during operation, preventing the voltage testing rod 3 from shifting or shaking, and ensuring good contact between the voltage testing rod 3 and the conductive rod 2, thereby improving the accuracy and safety of voltage testing.

[0045] like Figure 2As shown, a limiting platform 33 is provided at the connection between the clamping section 31 and the extension section 32. The limiting platform 33 can abut against the end face of the housing 1, which can enhance the overall connection between the voltage testing rod 3 and the housing 1. It can absorb or disperse external vibration or impact energy to a certain extent, prevent the voltage testing rod 3 from loosening or displacing due to excessive vibration, maintain the relative stability of the voltage testing rod 3 in the housing 1, and avoid the voltage testing rod 3 from shifting and damaging the conductive rod 2 connected to it when it is impacted, thereby improving the reliability and stability of the voltage testing device.

[0046] like Figure 2 As shown, the radial width of the clamping section 31 gradually decreases from the direction close to the extension section 32 toward the direction away from the extension section 32. The pointed clamping section 31 is more flexible and convenient to operate, and can perform voltage testing in some narrow spaces or inside electrical devices with complex structures. It can overcome space limitations and improve the applicability of the voltage testing device in various complex environments.

[0047] like Figure 2 As shown, the clamping section 31 includes a clamping surface 311. Both clamping surfaces 311 of the two clamping sections 31 are planes and are parallel to each other. The two clamping surfaces 311 can provide a uniform and stable clamping force. The two planes can achieve a large area of ​​contact with the wire to be tested, so that the wire to be tested is subjected to balanced force during clamping, and is not prone to slippage or shaking, thereby improving the accuracy and reliability of voltage testing.

[0048] like Figure 2 As shown, the drive assembly 5 includes a drive member 51, a connector 52, and a push rod 53. The drive member 51 is disposed inside the housing 1, and the connector 52 is slidably disposed on the inner wall of the housing 1. One end of the connector 52 is connected to the output end of the drive member 51, and the drive member 51 can drive the connector 52 to reciprocate relative to the housing 1. The other end of the connector 52 is rotatably connected to the first end of the push rod 53, and the second end of the push rod 53 is rotatably connected to the voltage testing rod 3. The drive member 51 drives the connector 52 to reciprocate relative to the housing 1, and the angle between the push rod 53 and the voltage testing rod 3 changes, so that the two voltage testing rods 3 move closer or further apart. This allows for flexible control of the two voltage testing rods 3 to move radially along the housing 1 within a certain range, enabling operations such as clamping, releasing, or adjusting the contact position of the wire to be tested, thus improving the flexibility of the voltage testing device.

[0049] In some embodiments, the drive element 51 can be a cylinder, in which a piston rod reciprocates within the cylinder, and one end of the piston rod is connected to a connecting member 52 to drive the connecting member 52 to reciprocate relative to the housing 1. In other embodiments, the drive element 51 can be a hydraulic cylinder, in which a piston rod reciprocates within the hydraulic cylinder, and one end of the piston rod is connected to the connecting member 52 to drive the connecting member 52 to reciprocate relative to the housing 1. In some embodiments, the drive element 51 may include a motor, a lead screw, and a nut. The motor is driven by the lead screw, the nut is fitted onto the lead screw and threadedly connected to the lead screw, and the nut is connected to the connecting member 52 to drive the connecting member 52 to reciprocate relative to the housing 1. The specific form of the drive element 51 is not limited here.

[0050] In this embodiment, the angle between the push rod 53 and the voltage testing rod 3 is between 60 degrees and 90 degrees. The initial angle is 60 degrees. As the angle increases from 60 degrees to 90 degrees, the two voltage testing rods 3 move closer to each other. As the angle decreases from 90 degrees to 60 degrees, the two voltage testing rods 3 move further apart. The specific angle can be 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 90 degrees, etc., and is not limited here. The goal is to ensure that the clamping sections 31 of the two voltage testing rods 3 can stably clamp the wire to be tested.

[0051] like Figure 1 As shown, the voltage testing device also includes a clamping switch 61 and a battery 7. One end of the clamping switch 61 is connected to the battery 7, and the other end is connected to the drive unit 51. The clamping switch 61 is used to start or stop the movement of the drive unit 51. The clamping switch 61 is located on the outside of the housing 1, which makes it convenient for the operator to operate the clamping switch 61 to control the clamping and releasing of the voltage testing rod 3 on the wire to be tested. This improves the convenience of operation of the voltage testing device, saves operation time, and improves the efficiency of voltage testing.

[0052] like Figure 3 As shown, the voltage testing mechanism includes a foil voltage testing component 41 and a multimeter voltage testing component 42. The foil voltage testing component 41 and the multimeter voltage testing component 42 are used to detect whether the wire to be tested, which is held by two voltage testing rods 3, is energized. By combining the two voltage testing methods of the foil voltage testing component 41 and the multimeter voltage testing component 42, the misjudgment that may occur with a single voltage testing method is effectively avoided, and the accuracy of the test results is greatly improved.

[0053] In some embodiments, the voltage testing mechanism includes only the foil voltage testing component 41. The foil voltage testing component 41 has an intuitive working principle, a simple structure, and is easy to manufacture and install. In other embodiments, the voltage testing mechanism includes only the multimeter voltage testing component 42. The multimeter voltage testing component 42 has high measurement accuracy and can measure various electrical parameters such as current, voltage, and resistance. It is adaptable to various electrical environments and application scenarios and can also provide feedback on whether the wire under test is energized.

[0054] In this embodiment, as Figure 3 As shown, the foil detector assembly 41 includes a resistor 411 and a foil detector 412. One end of the resistor 411 is connected to the conductive rod 2, and the other end is connected to the foil detector 412. The resistor 411 can limit the current flowing into the foil detector 412, preventing excessive current from damaging the foil detector 412, protecting the foil detector 412, extending its service life, and improving the reliability and accuracy of the voltage detection. Optionally, the resistance value of the resistor 411 can be 50 megohms to 300 megohms, specifically 60 megohms, 90 megohms, 120 megohms, 150 megohms, 180 megohms, 210 megohms, 240 megohms, 270 megohms, 300 megohms, etc., which are not limited here.

[0055] Specifically, the two foils in the foil detector 412 are originally electrically neutral. When current flows through the conductive rod 2, the two foils receive the conducted charge. The charge will redistribute on the surface of the two foils, causing the two foils to carry the same type of charge. According to the principle that like charges repel each other, the two foils will repel each other and open at a certain angle. The more charge in the wire to be tested, the more like charges on the foils, the greater the repulsive force between the two foils, and the larger the opening angle. A preliminary judgment can be quickly made based on the size of the opening angle of the two foils. The operation is simple and does not require complicated reading operations to detect whether the wire to be tested is charged.

[0056] In this embodiment, as Figure 3 As shown, the multimeter voltage testing assembly 42 includes a wire group and a multimeter 423. One end of the wire group is electrically connected to the conductive rod 2, and the other end is electrically connected to the multimeter 423. The multimeter 423 can provide detailed and accurate data, providing a basis for subsequent work or analysis and improving the reliability of the voltage testing device.

[0057] Specifically, such as Figure 3 As shown, the multimeter voltage testing component 42 also includes conductive plates 421. Two mounting slots 22 are opened on both sides of the conductive rod 2, and the two conductive plates 421 are respectively installed in the two mounting slots 22. The wire group includes two wires 422. The two first ends of the two wires 422 are respectively connected to the two conductive plates 421, and the two second ends of the two wires 422 are connected to the multimeter 423. The multimeter 423 can detect the magnitude of the current and voltage transmitted in the conductive rod 2. The multimeter 423 is a conventionally used device by those skilled in the art and will not be described in detail here.

[0058] This voltage testing device combines simplicity and intuitiveness with precise measurement capabilities, meeting the diverse voltage testing needs of different user groups and application scenarios. Even if one voltage testing component malfunctions—for example, if the foil detector 412 in the foil voltage testing component 41 is damaged or the multimeter 423 in the multimeter voltage testing component 42 malfunctions—the other voltage testing component can still function normally, improving the flexibility of the device.

[0059] like Figure 1 As shown, the voltage testing device also includes a voltage testing switch 62. One end of the voltage testing switch 62 is connected to the battery 7, and the other end is connected to the multimeter 423. The voltage testing switch 62 is used to turn the multimeter 423 on or off, and the voltage testing switch 62 is located on the outside of the housing 1. When it is necessary to use the multimeter 423 for voltage testing, the voltage testing switch 62 is operated to turn on the multimeter 423. When the voltage testing is completed or the multimeter 423 is no longer needed, it can be turned off. This reduces the risk of overheating, aging, and other malfunctions of the internal components of the multimeter 423 due to prolonged operation, saves the power of the multimeter 423, and helps extend the service life of the multimeter 423.

[0060] like Figure 1 As shown, the voltage testing device also includes an indicator light 8, which is located on the outside of the housing 1. The indicator light 8 is electrically connected to the multimeter 423 or the foil detector 412. When the wire to be tested is energized, the indicator light 8 lights up, providing a simple and intuitive prompt to the operator. This eliminates the need for the operator to carefully check the reading of the multimeter 423 or make complex judgments, thus improving the efficiency of voltage testing.

[0061] like Figure 1 As shown, the voltage testing device also includes a handheld tube 9, which is sleeved on the housing 1 and is made of insulating material. On the one hand, the handheld tube 9 is provided with anti-slip protrusions or dots to facilitate the operator's grip on the voltage testing device. On the other hand, the handheld tube 9 is made of insulating material to prevent current from being conducted to the operator's hand, thereby improving the safety of voltage testing.

[0062] In this embodiment, for the convenience of manufacturing and assembling the voltage detection device, such as... Figure 1 As shown, the housing 1 includes an extension cylinder 11, a connecting cylinder 12, a first housing 13, a second housing 14, and a partition 15. One end of the connecting cylinder 12 is connected to the extension cylinder 11, the other end of the connecting cylinder 12 is connected to the first end of the first housing 13, the second end of the first housing 13 is connected to the second housing 14, and a partition 15 is provided between the first housing 13 and the second housing 14.

[0063] like Figure 1As shown, a receiving cavity 121 is opened inside the connecting cylinder 12, a part of the extension section 32 is disposed in the receiving cavity 121, the driving assembly 5 is disposed in the receiving cavity 121, both ends of the extension cylinder 11 have radial openings 111, the other part of the extension section 32 is disposed in the extension cylinder 11, the extension section 32 can move radially inside the extension cylinder 11, and the limiting platform 33 abuts against the end face of the extension cylinder 11. A part 2 of the conductive rod 2 is fixed in the connecting cylinder 12, and the other part of the conductive rod 2 is disposed in the first shell 13. The first shell 13 is provided with a foil voltage detector assembly 41, and the foil voltage detector 412 is fixed to one end of the partition 15. The other end of the partition 15 is connected to the second shell 14. The second shell 14 is provided with a multimeter 423 and a battery 7. The wire 422 can pass through the partition 15 and connect to the multimeter 423. A handheld tube 9 is sleeved on the second shell 14. This structural design fully considers the maintenance and replacement needs of each component during use, improves the operability and practicality of the voltage testing device, reduces maintenance time and difficulty, lowers usage and maintenance costs, and ensures that the voltage testing device can maintain good performance and reliability during long-term use.

[0064] In some embodiments, both the first shell 13 and the second shell 14 are made transparent shells to facilitate observation of the voltage testing mechanism. In other embodiments, an installation port is provided on the second shell 14 for mounting the display screen of the multimeter 423, which also facilitates observation of the voltage testing results.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electrical testing device, characterized in that, include: Shell (1); A conductive rod (2) is disposed inside the housing (1), and a groove (21) is provided at one end of the conductive rod (2) along the radial direction of the conductive rod (2). Two voltage testing rods (3) are slidably disposed in the groove (21), and at least part of the voltage testing rods (3) extend out of the housing (1). The driving mechanism includes two driving components (5), both of which are disposed in the housing (1). The output end of each driving component (5) is connected to one of the voltage testing rods (3). The two driving components (5) are configured to drive the two voltage testing rods (3) to move closer or further away from each other along the radial direction of the conductive rod (2) to clamp or release the wire to be tested. A voltage testing mechanism is provided inside the housing (1). The end of the conductive rod (2) away from the two voltage testing rods (3) is connected to the voltage testing mechanism. The voltage testing mechanism is configured to detect whether the wire to be tested held by the two voltage testing rods (3) is energized. The voltage testing rod (3) includes a clamping section (31) and an extension section (32). The clamping section (31) is located outside the housing (1), and the extension section (32) is located inside the housing (1). One end of the extension section (32) is connected to the clamping section (31), and the other end is connected to the output end of the drive assembly (5). A limiting protrusion is provided at the end of the extension section (32) away from the clamping section (31). The limiting protrusion is slidably disposed in the groove (21) along the radial direction of the conductive rod (2). The driving component (5) includes: A drive unit (51) is disposed within the housing (1); A connector (52) is slidably disposed on the inner wall of the housing (1). One end of the connector (52) is connected to the output end of the drive (51). The drive (51) can drive the connector (52) to reciprocate relative to the housing (1). The push rod (53) has its other end rotatably connected to the first end of the connector (52), and its second end rotatably connected to the voltage testing rod (3). The angle between the push rod (53) and the voltage testing rod (3) changes so that the two voltage testing rods (3) move closer to each other or further away from each other.

2. The voltage testing device according to claim 1, characterized in that, A limiting platform (33) is provided at the connection between the clamping section (31) and the extension section (32), and the limiting platform (33) can abut against the end face of the housing (1).

3. The voltage testing device according to claim 1, characterized in that, The radial width of the clamping segment (31) gradually decreases from the direction close to the extension segment (32) toward the direction away from the extension segment (32).

4. The voltage testing device according to claim 1, characterized in that, The clamping segment (31) includes a clamping surface (311), and both clamping surfaces (311) of the two clamping segments (31) are planes and the two clamping surfaces (311) are parallel to each other.

5. The voltage testing device according to any one of claims 1-4, characterized in that, The voltage testing mechanism includes a foil voltage testing component (41) and / or a multimeter voltage testing component (42), wherein the foil voltage testing component (41) and / or the multimeter voltage testing component (42) are configured to detect whether the wire to be tested held by the two voltage testing rods (3) is energized.

6. The voltage testing device according to claim 5, characterized in that, The foil voltage detector assembly (41) includes a resistor (411) and a foil voltage detector (412). One end of the resistor (411) is connected to the conductive rod (2), and the other end is connected to the foil voltage detector (412).

7. The voltage testing device according to claim 5, characterized in that, The multimeter voltage testing assembly (42) includes a wire group and a multimeter (423). One end of the wire group is electrically connected to the conductive rod (2), and the other end is electrically connected to the multimeter (423).

8. The voltage testing device according to any one of claims 1-4, characterized in that, The voltage testing device also includes a handheld tube (9), which is sleeved on the housing (1) and is made of insulating material.

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