Measuring clamp for electric power metering instrument

Abstract

The utility model relates to the technical field of instrument accessories, in particular to an electric power metering instrument measuring clamp which comprises a measuring instrument body, a control panel is arranged on the front face of the measuring instrument body, a connector is arranged at the bottom end of the measuring instrument body, and a connecting rod is arranged at the bottom end of the connector. The clamping assembly is arranged at the other end of the connecting rod, and the clamping assembly is used for clamping the measured cable for measurement; and the adjusting assembly is arranged in the clamping assembly, and the adjusting assembly is used for driving the clamping assembly to conduct adjustment. Compared with the prior art, the clamping assembly is arranged, the synchronism and accuracy of the clamping action are guaranteed, the adjusting ring is prevented from loosening or rotating through a limiting structure of the clamping jaw and the meshing teeth, and the stability of the clamping action is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of instrument accessories technology, and in particular to a measuring clamp for a power metering instrument. Background Technology

[0002] Electricity metering instruments are a type of equipment used to measure electrical parameters in power systems. They are widely used in the production, transmission, distribution, and consumption of electricity, and measuring fixtures play an important role in the production, testing, and calibration of electricity metering instruments.

[0003] In the prior art, Chinese patent document CN217689097U discloses a measuring clamp for an electric meter. When in use, the electric meter is placed on a circular tray, which moves towards a circular base, causing a rotating rod to rotate. This causes a rubber pad at the end of the rotating rod to press against the surface of the electric meter, thus fixing the electric meter. This invention is convenient to use and can clamp and fix electric meters of different sizes and specifications. However, like traditional methods, it is usually unable to adapt to cables of different specifications or shapes, resulting in insufficient clamping force or uneven clamping, affecting the stability of electric measurement. Furthermore, traditional clamps lack simple and effective limiting structures or flexible adjustments, requiring operators to spend more time and effort fixing and adjusting the cables. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a measuring clamp for power metering instruments to solve the problem of insufficient clamping force or uneven clamping caused by the inability to adapt to cables of different specifications or shapes.

[0005] To achieve the above objectives, this utility model provides a power metering instrument measuring fixture, including a measuring instrument body, a control panel on the front of the measuring instrument body, a connector at the bottom of the measuring instrument body, and a connecting rod at the bottom of the connector.

[0006] A clamping assembly is disposed at the other end of the connecting rod and is used to clamp the cable under test for measurement.

[0007] An adjustment component is disposed inside the clamping component, and the adjustment component is used to drive the clamping component to make adjustments.

[0008] Two wires are also provided on both sides of the measuring instrument body and electrically connected to the inside of the clamping assembly.

[0009] Preferably, the clamping assembly includes a circular base fixedly installed at the lower end of the connecting rod. A conductive test ring is provided in the center of the circular base. Insulating rings are provided at both ends of the conductive test ring. A first mounting plate and a second mounting plate are respectively provided at both ends of the circular base. The wires on both sides of the measuring instrument body are electrically connected to the conductive test ring. A plurality of clamping arms are rotatably mounted on the inner circumference of the conductive test ring. A clamping plate is rotatably mounted on the other side of each clamping arm.

[0010] Preferably, an insulating ring near the second mounting piece is provided with a mounting groove, a rotating gear is rotatably mounted inside the mounting groove, an adjusting ring is rotatably mounted between the circular base and the second mounting piece, and a plurality of first meshing teeth that mesh with the rotating gear are provided on one side of the adjusting ring.

[0011] Preferably, a chuck is rotatably mounted on one side of the mounting groove, the chuck being adapted to the first meshing tooth, and a sliding block for releasing the chuck from its limiting position is slidably mounted below the chuck, and a sliding groove adapted to the sliding block is provided on one side of the second mounting plate.

[0012] Preferably, the side of the adjusting ring near the circular base is provided with a push block adapted to a plurality of the clamping arms, the push block being used to push the clamping arms toward the center point of the conductive test ring.

[0013] Preferably, the annular base is made of rigid polycarbonate material.

[0014] Preferably, the two insulating rings are made of rubber insulating material.

[0015] Preferably, the adjusting assembly includes a rotating rod rotatably mounted inside the connecting rod, the rotating rod passing through the measuring instrument body, a second bevel gear coaxially connected to one side of the rotating gear, and a first bevel gear meshing with the second bevel gear at one end of the rotating rod.

[0016] Preferably, the other end of the rotating rod passes through the connecting rod to the interior of the connector, a rotating sleeve is rotatably mounted in the middle of the connector, a plurality of second meshing teeth are provided on the side of the rotating rod near the rotating sleeve, and a plurality of third meshing teeth that mesh with the second meshing teeth are provided on the inner side of the rotating sleeve.

[0017] Preferably, both the rotating rod and the rotating sleeve are made of hard rubber.

[0018] The beneficial effects of this utility model are:

[0019] 1. This type of power meter measuring clamp, through the setting of clamping components, ensures the signal transmission efficiency of the cable by electrically connecting the conductive test ring to the wire, accurately measuring power parameters. The clamping arm and clamping plate, through linkage with the adjusting ring, can adjust the clamping force as needed, making the device adaptable to cables of different specifications. The rotation of the adjusting ring is precisely controlled by the meshing gear system to move the clamping arm, ensuring the synchronicity and accuracy of the clamping action. The limiting structure of the pawl and meshing teeth prevents the adjusting ring from loosening or rotating, ensuring the stability of the clamping action.

[0020] 2. This type of power metering instrument measuring clamp, through the setting of an adjustment component, enables smooth and efficient transmission of rotational motion via the engagement of the third and second meshing teeth, ensuring precise adjustment of the clamping arm and clamping plate. Through engagement with the first and second bevel gears, the adjustment component provides sufficient torque to adjust the clamping force and clamping position, allowing the device to adapt to the measurement needs of cables of different specifications. During operation, the rotation of the rotating sleeve directly drives the rotating rod, thereby controlling the movement of the clamping component, reducing mechanical impact during operation, and ensuring the stability of the equipment. The use of hard rubber material improves the wear resistance and shock resistance of the transmission system, extending the service life of the equipment, while reducing mechanical vibration and ensuring smooth and accurate operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective;

[0024] Figure 3 This is a three-dimensional structural diagram of the present invention from a third-view perspective;

[0025] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 This is a schematic diagram of the adjustment component structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the clamping component structure of this utility model;

[0028] Figure 7 This is an exploded view of the clamping assembly of this utility model;

[0029] Figure 8 This is a schematic diagram of the adjusting ring structure of this utility model.

[0030] The diagram is marked as follows:

[0031] 1. Measuring instrument body; 2. Control panel; 3. Connector; 4. Circular base; 5. Insulating ring; 6. First mounting plate; 7. Second mounting plate; 8. Conductive test ring; 9. Clamping arm; 10. Clamping plate; 11. Mounting groove; 12. Rotating gear; 13. Claw; 14. Sliding block; 15. Slide groove; 16. Adjusting ring; 17. First meshing tooth; 18. Push block; 19. Rotating rod; 20. First bevel gear; 21. Second bevel gear; 22. Second meshing tooth; 23. Rotating sleeve; 24. Third meshing tooth; 25. Connecting rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0033] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] like Figures 1 to 8 As shown, the power metering instrument measuring fixture includes a measuring instrument body 1, a control panel 2 on the front of the measuring instrument body 1, a connector 3 at the bottom of the measuring instrument body 1, and a connecting rod 25 at the bottom of the connector 3; a clamping assembly located at the other end of the connecting rod 25, the clamping assembly being used to clamp the cable under test for measurement; an adjustment assembly located inside the clamping assembly, the adjustment assembly being used to drive the clamping assembly for adjustment; and two wires on both sides of the measuring instrument body 1, electrically connected to the inside of the clamping assembly.

[0035] First, the parameters of the measuring instrument body 1 are set through the control panel 2, and the measurement mode and range are selected. Then, the cable is placed into the clamping assembly. The clamping assembly is fixed to the lower end of the measuring instrument body 1 through the connector 3 and the connecting rod 25 to ensure the stability of the entire device. The position and clamping force of the clamping assembly are adjusted by adjusting the component to fix the cable in the appropriate position. The electrical connection between the cable and the measuring instrument body 1 is completed through the wire. The measuring instrument body 1 then starts the measurement program. While the clamping assembly firmly supports the cable, it transmits the cable's power parameters to the measuring instrument body 1. The control panel 2 displays the measurement data in real time. After the measurement is completed, the operator releases the clamping assembly through the adjusting component, removes the cable from the device, and turns off the instrument to complete the measurement operation.

[0036] like Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, the clamping assembly includes a circular base 4 fixedly installed at the lower end of the connecting rod 25. A conductive test ring 8 is provided in the center of the circular base 4. Insulating rings 5 ​​are provided at both ends of the conductive test ring 8. A first mounting plate 6 and a second mounting plate 7 are respectively provided at both ends of the circular base 4. The wires on both sides of the measuring instrument body 1 are electrically connected to the conductive test ring 8. Several clamping arms 9 are rotatably mounted on the inner circumference of the conductive test ring 8. A clamping plate 10 is rotatably mounted on the other side of each clamping arm 9. An installation groove 11 is opened on the insulating ring 5 near the second mounting plate 7. A rotating gear 12 is rotatably mounted inside the installation groove 11. An adjusting ring 16 is rotatably mounted between the ring base 4 and the second mounting plate 7. One side of the adjusting ring 16 is provided with several first meshing teeth 17 that mesh with the rotating gear 12. A pawl 13 is also rotatably mounted on one side of the mounting groove 11. The pawl 13 is adapted to the first meshing teeth 17. A sliding block 14 for releasing the pawl 13 is also slidably mounted below the pawl 13. A sliding groove 15 adapted to the sliding block 14 is opened on one side of the second mounting plate 7. A push block 18 adapted to several clamping arms 9 is provided on the side of the adjusting ring 16 near the ring base 4. The push block 18 is used to push the clamping arms 9 toward the center point of the conductive test ring 8.

[0037] First, the cable is placed in the conductive test ring 8 area inside the clamping assembly. The rotation of the adjusting ring 16 causes the push block 18 to move in conjunction with the clamping arm 9, pushing the clamping arm 9 to clamp the cable towards the center point of the conductive test ring 8. The clamping plate 10 then securely holds the cable in place, ensuring it does not shift during measurement. The rotation of the adjusting ring 16 drives the rotating gear 12 via the first meshing tooth 17, further ensuring the synchronicity and accuracy of the clamping action. After the pawl 13 engages with the first meshing tooth 17, the limiting structure takes effect, preventing the adjusting ring from moving. If the 16 is accidentally loosened or rotated, and the clamping state needs to be adjusted, the sliding block 14 slides along the slide groove 15 to release the limit of the pawl 13. The adjusting ring 16 can then rotate again to adjust the position of the clamping arm 9. The conductive test ring 8 completes the electrical connection and signal transmission of the cable through the wires on both sides of the measuring instrument body 1, starts the measurement and displays the data in real time. After the measurement is completed, the sliding block 14 is released from the limit again, the adjusting ring 16 rotates in the opposite direction, the push block 18 retracts, the clamping arm 9 is released, and the operator takes out the cable to prepare for the next measurement operation.

[0038] The circular base 4 is made of rigid polycarbonate, and the two insulating rings 5 ​​are made of rubber insulation.

[0039] The circular base 4 is made of hard polycarbonate material, which has excellent wear resistance and high strength, can withstand greater mechanical impact and pressure, and has insulation properties. The insulating ring 5 is made of rubber insulating material, which has good electrical insulation properties, effectively isolates conductive parts, and prevents current leakage or short circuit.

[0040] like Figures 3 to 5 As shown, the adjustment assembly includes a rotating rod 19 rotatably installed inside the connecting rod 25. The rotating rod 19 passes through the measuring instrument body 1. A second bevel gear 21 is coaxially connected to one side of the rotating gear 12. A first bevel gear 20 that meshes with the second bevel gear 21 is provided at one end of the rotating rod 19. The other end of the rotating rod 19 passes through the connecting rod 25 to the interior of the connector 3. A rotating sleeve 23 is rotatably installed in the middle of the connector 3. Several second meshing teeth 22 are provided on the side of the rotating rod 19 near the rotating sleeve 23. Several third meshing teeth 24 that mesh with the second meshing teeth 22 are provided on the inner side of the rotating sleeve 23. Both the rotating rod 19 and the rotating sleeve 23 are made of hard rubber.

[0041] By rotating the rotating sleeve 23, the third meshing tooth 24 on the inner side of the rotating sleeve 23 meshes with the second meshing tooth 22, driving the rotating rod 19 to rotate. The rotation of the rotating rod 19, through meshing with the first bevel gear 20 and the second bevel gear 21, drives the rotating gear 12, thereby adjusting the position of the clamping arm 9 and the clamping plate 10 in the clamping assembly, so that the cable is firmly clamped in the appropriate position. As needed, the operator continues to rotate the rotating sleeve 23 to achieve further adjustments, ensuring the clamping stability of the cable. After the measurement is completed, the operator rotates the rotating sleeve 23 in the opposite direction, driving the clamping assembly to release the cable for easy removal. The entire process, through precise gear engagement and hard rubber material, ensures the smoothness and stability of the measurement operation. It utilizes the mechanical advantages of gear engagement to provide strong transmission torque and stability, ensuring the accuracy and smoothness of the clamping action. In addition, through the optimization of this transmission structure, a wide range of clamping adjustments can be achieved with a small operating force, improving the convenience of operation and the reliability of the mechanical system.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0043] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A measuring clamp for an electric metering instrument, characterized in that, include: The measuring instrument body (1) has a control panel (2) on its front side and a connector (3) at its bottom end. The connector (3) has a connecting rod (25) at its bottom end. A clamping assembly is disposed at the other end of the connecting rod (25) and is used to clamp the cable under test for measurement. An adjustment component is disposed inside the clamping component, and the adjustment component is used to drive the clamping component to make adjustments. Two wires are also provided on both sides of the measuring instrument body (1) and electrically connected to the inside of the clamping assembly. The clamping assembly includes a circular base (4) fixedly installed at the lower end of the connecting rod (25). A conductive test ring (8) is provided in the center of the circular base (4). Insulating rings (5) are provided at both ends of the conductive test ring (8). A first mounting plate (6) and a second mounting plate (7) are provided at both ends of the circular base (4). The wires on both sides of the measuring instrument body (1) are electrically connected to the conductive test ring (8). Several clamping arms (9) are rotatably installed on the inner circumference of the conductive test ring (8). A clamping plate (10) is rotatably installed on the other side of each clamping arm (9).

2. The power metering instrument measuring fixture according to claim 1, characterized in that, An installation groove (11) is provided on the insulating ring (5) near the second mounting plate (7). A rotating gear (12) is rotatably installed inside the installation groove (11). An adjusting ring (16) is rotatably installed between the circular base (4) and the second mounting plate (7). A plurality of first meshing teeth (17) that mesh with the rotating gear (12) are provided on one side of the adjusting ring (16).

3. The power metering instrument measuring fixture according to claim 2, characterized in that, A pawl (13) is rotatably mounted on one side of the mounting groove (11). The pawl (13) is adapted to the first meshing tooth (17). A sliding block (14) for releasing the pawl (13) is slidably mounted below the pawl (13). A sliding groove (15) adapted to the sliding block (14) is opened on one side of the second mounting piece (7).

4. The power metering instrument measuring fixture according to claim 3, characterized in that, The adjusting ring (16) is provided with a push block (18) on the side near the circular base (4) that is adapted to a plurality of clamping arms (9). The push block (18) is used to push the clamping arms (9) toward the center point of the conductive test ring (8).

5. The power metering instrument measuring fixture according to claim 4, characterized in that, The circular base (4) is made of rigid polycarbonate material.

6. The power metering instrument measuring fixture according to claim 5, characterized in that, The two insulating rings (5) are made of rubber insulation material.

7. The power metering instrument measuring fixture according to claim 2, characterized in that, The adjustment assembly includes a rotating rod (19) rotatably installed inside the connecting rod (25). The rotating rod (19) passes through the measuring instrument body (1). A second bevel gear (21) is coaxially connected to one side of the rotating gear (12). A first bevel gear (20) meshing with the second bevel gear (21) is provided at one end of the rotating rod (19).

8. The power metering instrument measuring fixture according to claim 7, characterized in that, The other end of the rotating rod (19) passes through the connecting rod (25) to the interior of the connector (3). A rotating sleeve (23) is rotatably installed in the middle of the connector (3). A plurality of second meshing teeth (22) are provided on the side of the rotating rod (19) near the rotating sleeve (23). A plurality of third meshing teeth (24) that mesh with the second meshing teeth (22) are provided on the inner side of the rotating sleeve (23).

9. The power metering instrument measuring fixture according to claim 8, characterized in that, Both the rotating rod (19) and the rotating sleeve (23) are made of hard rubber.

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