Clip-on ammeter

Abstract

The utility model relates to a clip-on ammeter, which comprises a shell, a clip head, a data instrument and a current transformer, the current transformer is mounted in the shell, the clip head is mounted at the top of the shell and connected with the current transformer, a cavity is arranged in the shell, a clip head trigger on the clip head is positioned in the cavity, and a pressing mechanism for pressing the clip head trigger is arranged in the cavity. The pressing mechanism comprises a rotating rod, a worm gear, a worm, a lead screw and a pressing plate, the pressing plate is slidably arranged between the upper inner wall and the lower inner wall of the cavity, the lead screw is fixedly connected with the worm and rotationally connected between the inner walls of the left side and the right side of the cavity, the lead screw is in threaded connection with the pressing plate, the rotating rod is rotationally connected to the top in the cavity, and the worm gear is fixedly arranged on the rotating rod and meshed with the worm. The bottom of the rotating rod penetrates out of the shell and then is provided with a first telescopic mechanism, and a second telescopic mechanism is arranged between the shell and the data instrument. The device is time-saving and labor-saving in use, small in limitation on the height of a to-be-measured wire, convenient for ensuring stable operation in the measurement process, high in safety and high in use flexibility.

Description

Technical Field

[0001] The utility model relates to the field of current measuring instruments, in particular to a clamp-type ammeter. Background Art

[0002] When measuring current with an ordinary ammeter, the circuit needs to be cut off and shut down before the ammeter can be connected for measurement, which is very troublesome. Sometimes the normal operating equipment does not allow this. At this time, it is much more convenient to use a clamp ammeter, which can measure the current without cutting off the circuit.

[0003] The clamp ammeter is composed of a current transformer and an ammeter. The iron core of the current transformer can be opened when the wrench is squeezed, and the wire through which the measured current passes can pass through the gap of the iron core without being cut off. When the wrench is released, the iron core closes.

[0004] However, the conductors to be measured are often distributed at different heights. When it is necessary to measure the current of a conductor that is slightly higher than the height of the worker, because the height of the conductor is not too high, the worker often stands on tiptoe to reach out and take the clamp ammeter to measure directly in order to save the trouble of moving the ladder. This will not only make the workers time-consuming and laborious, but the measurement process cannot be guaranteed to be smooth due to the workers' tiptoeing action. If the worker accidentally falls, the wire may even be pulled apart, causing a safety accident.

[0005] For example, the Chinese utility model patent with publication number CN211955636U discloses a clamp-on ammeter, which uses a scissor-type control mechanism connected to the clamp-on ammeter to avoid workers standing on tiptoe to measure slightly higher wires, thereby ensuring that workers can perform their measurement tasks smoothly. However, the scissor-type control mechanism has a fixed height, which greatly limits the height of the wire to be measured, and the data displayed on the instrument is not convenient to observe in time, and the flexibility of use is low. Summary of the invention

[0006] The utility model aims to solve the deficiencies of the prior art and provides a clamp ammeter.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a clamp ammeter, including a shell, a clamp head, a data meter, and a current transformer. The current transformer is installed in the shell, the clamp head is installed on the top of the shell and connected to the current transformer, a cavity is provided inside the shell, a clamp head trigger on the clamp head is located in the cavity, a pressing mechanism for pressing the clamp head trigger is provided in the cavity, the pressing mechanism includes a rotating rod, a worm wheel, a worm, a screw rod, and a pressing plate, the pressing plate is slidably arranged between the upper and lower inner walls of the cavity, the screw rod is fixedly connected to the worm and rotatably connected between the left and right inner walls of the cavity, and the screw rod is threadedly connected to the pressing plate, the rotating rod is rotatably connected to the top of the cavity, the worm wheel is fixed on the rotating rod and meshes with the worm, a first telescopic mechanism is provided after the bottom of the rotating rod passes through the shell, and a second telescopic mechanism is provided between the shell and the data meter.

[0008] In particular, a hand grip is provided at the bottom of the data instrument.

[0009] Particularly, the first telescopic mechanism comprises a first sleeve and a first tightening knob, the rotating rod is sleeved in the first sleeve, the first tightening knob is threadedly connected to the top of the outer wall of the first sleeve and presses the rotating rod, and a hand wheel is provided at the bottom of the first sleeve.

[0010] In particular, the second telescopic mechanism includes a second sleeve, a support rod, and a second fastening knob. The second sleeve is fixedly connected to the top of the data instrument, the top of the support rod is fixedly connected to the bottom of the shell, and the bottom is sleeved in the second sleeve. The second fastening knob is threadedly connected to the top of the outer wall of the second sleeve and presses the support rod.

[0011] Particularly, a connecting block is fixedly arranged at the bottom of the outer wall of the second sleeve, and the bottom of the first sleeve passes through the connecting block and is rotatably connected to the connecting block.

[0012] The beneficial effects of the utility model are as follows: the utility model makes it easy to adjust the height of the clamp head by arranging a shell, a pressing mechanism, a first telescopic mechanism, and a second telescopic mechanism, and can measure wires of different heights, and has a wide range of applications. At the same time, the current transformer and the data meter are separately arranged, which is convenient for timely observation of measurement data. Compared with the prior art, the utility model saves time and effort when used, has little limitation on the height of the wire to be measured, is easy to ensure a smooth measurement process, has high safety, and is highly flexible in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0015] In the figure: 1-housing; 2-clamp head; 3-data meter; 4-cavity; 5-clamp head trigger; 6-rotating rod; 7-worm gear; 8-worm; 9-screw; 10-pressing plate; 11-hand grip; 12-first sleeve; 13-first tightening knob; 14-hand wheel; 15-second sleeve; 16-support rod; 17-second tightening knob; 18-connecting block;

[0016] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] like Figure 1-Figure 2As shown, a clamp ammeter includes a housing 1, a clamp head 2, a data meter 3, and a current transformer. The current transformer is installed in the housing 1, the clamp head 2 is installed on the top of the housing 1 and connected to the current transformer, a cavity 4 is provided inside the housing 1, a clamp head trigger 5 on the clamp head 2 is located in the cavity 4, and a pressing mechanism for pressing the clamp head trigger 5 is provided in the cavity 4;

[0019] The pressing mechanism includes a rotating rod 6, a worm wheel 7, a worm 8, a screw 9, and a pressing plate 10. The pressing plate 10 is slidably arranged between the upper and lower inner walls of the cavity 4. The screw 9 is fixedly connected to the worm 8 and rotatably connected between the left and right inner walls of the cavity 4. The screw 9 is threadedly connected to the pressing plate 10. The rotating rod 6 is rotatably connected to the top of the cavity 4. The worm wheel 7 is fixedly arranged on the rotating rod 6 and meshes with the worm 8.

[0020] A first telescopic mechanism is provided after the bottom of the rotating rod 6 passes through the housing 1. The first telescopic mechanism includes a first sleeve 12 and a first tightening knob 13. The rotating rod 6 is sleeved in the first sleeve 12. The first tightening knob 13 is threadedly connected to the top of the outer wall of the first sleeve 12 and presses the rotating rod 6. A hand wheel 14 is provided at the bottom of the first sleeve 12.

[0021] A second telescopic mechanism is provided between the housing 1 and the data meter 3, a hand grip 11 is provided at the bottom of the data meter 3, the second telescopic mechanism includes a second sleeve 15, a support rod 16, and a second fastening knob 17, the second sleeve 15 is fixedly connected to the top of the data meter 3, the top of the support rod 16 is fixedly connected to the bottom of the housing 1, and the bottom is sleeved in the second sleeve 15, the second fastening knob 17 is threadedly connected to the top of the outer wall of the second sleeve 15 and presses the support rod 16, a connecting block 18 is fixedly provided at the bottom of the outer wall of the second sleeve 15, the bottom of the first sleeve 12 passes through the connecting block 18 and is rotatably connected to the connecting block 18, the data meter 3 is connected to the current transformer, a threading hole is provided inside the support rod 16, and the connecting wire is placed in the support rod 16 and the second sleeve 15.

[0022] When the utility model is working, the first tightening knob 13 and the second tightening knob 17 are loosened, and the distance between the housing 1 and the data meter 3 is adjusted according to the height of the wire to be measured. After the adjustment, the first tightening knob 13 and the second tightening knob 17 are tightened, the hand wheel 14 is rotated, the pressing plate 10 presses the clamp head trigger 5, the clamp head 2 is opened, and the wire to be measured is inserted into the clamp head 2, the hand wheel 14 is rotated in the opposite direction, the pressing plate 10 releases the clamp head trigger 5, the clamp head 2 is closed, and the measurement starts, and the measurement structure is displayed on the data meter 4 below.

[0023] The utility model makes it easy to adjust the height of the clamp head 2, and can measure wires of different heights, and has a wide range of applications. At the same time, the current transformer and the data meter 4 are separately arranged, which is convenient for timely observation of measurement data. Compared with the prior art, the utility model saves time and effort when used, has little limitation on the height of the wire to be measured, is easy to ensure a smooth measurement process, has high safety, and is highly flexible in use.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A clamp ammeter, characterized in that: The invention comprises a housing (1), a clamp head (2), a data meter (3), and a current transformer, wherein the current transformer is installed in the housing (1), the clamp head (2) is installed on the top of the housing (1) and is connected to the current transformer, a cavity (4) is provided inside the housing (1), a clamp head trigger (5) on the clamp head (2) is located in the cavity (4), a pressing mechanism for pressing the clamp head trigger (5) is provided in the cavity (4), and the pressing mechanism comprises a rotating rod (6), a worm wheel (7), a worm (8), a screw (9), and a pressing plate (10). The pressing plate (10) is slidably arranged between the upper and lower inner walls of the cavity (4); the screw (9) and the worm (8) are fixedly connected and rotatably connected between the left and right inner walls of the cavity (4); the screw (9) and the pressing plate (10) are threadedly connected; the rotating rod (6) is rotatably connected to the top of the cavity (4); the worm wheel (7) is fixedly arranged on the rotating rod (6) and meshes with the worm (8); a first telescopic mechanism is arranged after the bottom of the rotating rod (6) passes through the housing (1); and a second telescopic mechanism is arranged between the housing (1) and the data instrument (3).

2. A clamp ammeter according to claim 1, characterized in that: A hand grip (11) is provided at the bottom of the data meter (3).

3. A clamp ammeter according to claim 1, characterized in that: The first telescopic mechanism comprises a first sleeve (12) and a first tightening knob (13); the rotating rod (6) is sleeved in the first sleeve (12); the first tightening knob (13) is threadedly connected to the top of the outer wall of the first sleeve (12) and presses the rotating rod (6); and a hand wheel (14) is provided at the bottom of the first sleeve (12).

4. A clamp ammeter according to claim 3, characterized in that: The second telescopic mechanism comprises a second sleeve (15), a support rod (16), and a second tightening knob (17); the second sleeve (15) is fixedly connected to the top of the data meter (3); the top of the support rod (16) is fixedly connected to the bottom of the housing (1); the bottom is sleeved in the second sleeve (15); the second tightening knob (17) is threadedly connected to the top of the outer wall of the second sleeve (15) and presses the support rod (16).

5. A clamp ammeter according to claim 4, characterized in that: A connecting block (18) is fixedly arranged at the bottom of the outer wall of the second sleeve (15), and the bottom of the first sleeve (12) passes through the connecting block (18) and is rotatably connected to the connecting block (18).

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