CN216771823U - Novel clamp-on ammeter - Google Patents

Abstract

The utility model discloses a novel clamp-on ammeter which comprises a detection main body, a telescopic bracket and a clamp, wherein the telescopic bracket comprises a rotary base, a telescopic pipe and a screw rod; the telescopic pipe is sleeved outside the screw rod, and a threaded hole is formed below the telescopic pipe and is in threaded fit with the screw rod; the rotary base drives the screw rod to rotate, and the telescopic pipe moves up and down along the screw rod; the clamp comprises a fixed clamp and a movable clamp, the fixed clamp is arranged at the top of the telescopic pipe, the movable clamp is connected with the tail end of the fixed clamp through a rotating shaft, and the front ends of the movable clamp and the fixed clamp are closed to form a closed annular structure; an insulating rope is fixed on the outer side of the movable clamp, and the bottom end of the insulating rope is wound on the winding table. The clamp of the utility model is arranged on the telescopic bracket, the length of the clamp can be changed at will, and the clamp is suitable for detecting wires at different positions.

Description

Novel clamp-on ammeter

Technical Field

The utility model relates to the technical field of current measuring equipment, in particular to a novel clamp-on ammeter.

Background

The split core ammeter is formed by combining a current transformer and an ammeter. The iron core of the current transformer can be opened when the wrench is tightened; the lead through which the current to be measured passes can pass through the open notch of the iron core without being cut off, and the iron core is closed after the wrench is released. The current-measuring circuit leads passing through the iron core become the primary coil of the current transformer, wherein the secondary coil is induced by the current, so that the ammeter connected with the secondary coil has an indication to measure the current of the measured circuit.

The existing clamp-on ammeter has small volume, a clamp is short and small, only wires in a short distance can be detected, some detection environments are complex, wiring needing to be detected is far, an arm needs to be extended as far as possible to measure in the measuring operation process of a user, and the arm possibly touches adjacent electrified equipment or wiring in the operation process, so that the personal safety of an operator is seriously threatened, and other equipment and components can be damaged. At present, some ampere meters with extensible clamps are available on the market, but the general structure is relatively complex, the size of a telescopic mechanism is relatively large, other components are easy to touch during telescopic operation, and the ampere meter is not suitable for being used in a narrow or compact electricity utilization environment with the components; simultaneously, when some pincerlike ampere meters use, need aim at the wire by survey to the clamp, then push forward hard for in being surveyed the wire and being blocked into the clamp, promote hard that the clamp hits other components and parts easily, and this kind of clamp opening mode can wear and tear by survey the wire, influence wire life.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a novel clamp type ammeter which is simple in structure, small in size, capable of adjusting the length of a clamp at will, and capable of opening the clamp easily to meet detection requirements in different power utilization environments.

Therefore, the technical scheme of the utility model is as follows: a novel clamp type ammeter comprises a detection main body, a telescopic support and a clamp, wherein the telescopic support comprises a rotary base, a telescopic pipe and a screw rod, the rotary base is rotatably installed above the detection main body, a winding table is arranged above the rotary base, and the screw rod is fixedly installed above the winding table; the telescopic pipe is sleeved outside the screw rod, and a threaded hole is formed below the telescopic pipe and is in threaded fit with the screw rod; the rotary base drives the screw rod to rotate, and the telescopic pipe moves up and down along the screw rod; the clamp comprises a fixed clamp and a movable clamp, the fixed clamp is arranged at the top of the telescopic pipe, the movable clamp is connected with the tail end of the fixed clamp through a rotating shaft, and the front ends of the movable clamp and the fixed clamp are closed to form a closed annular structure; an insulating rope is fixed on the outer side of the movable clamp, and the bottom end of the insulating rope is wound on the winding table.

The threaded hole at the bottom of the telescopic pipe is matched with the screw rod, when the screw rod is driven to rotate by the rotating base, the telescopic pipe can move upwards along the screw rod, the length of the clamp is prolonged, and the telescopic pipe is linearly telescopic, does not occupy left and right space, and is suitable for detecting a lead at a narrow position; the movable clamp and the fixed clamp are in a closed annular structure in an unstressed state, the top end of the insulating rope is fixed on the movable clamp, the movable clamp can be opened by pulling the insulating rope to clamp a wire to be detected, the insulating rope is loosened, the movable clamp and the fixed clamp are immediately closed to start detecting the current in the wire; insulating rope winding is on rotating base's wire winding bench, and rotating base drives the screw rod when rotating, emits insulating rope in step or withdraws insulating rope for insulating rope can not influence the removal of flexible pipe.

Preferably, the tail ends of the movable pliers and the fixed pliers are provided with torsion springs, the torsion springs are sleeved on the rotating shaft, the movable pliers and the fixed pliers are closed into an annular structure through the torsion springs, and the insulating rope is in a loose state; the insulating rope can drive the movable pliers to rotate around the rotating shaft, the front ends of the movable pliers and the fixed pliers are opened, and the insulating rope is in a tight state. The torsion spring can keep the movable pliers and the fixed pliers in a closed state all the time in an unstressed state, and the insulating rope is in a loose state, namely the movable pliers are not stressed by the insulating rope; when the movable pliers and the fixed pliers need to be opened to clamp a lead, the insulating rope is pulled to be tightened, and further pulling force is applied to the movable pliers, so that the movable pliers and the fixed pliers are conveniently opened.

Preferably, the screw rod is of a hollow structure, and a cavity for accommodating a lead to pass through is formed in the screw rod; the rotating base and the winding table are internally provided with through holes which are communicated with the cavity of the screw rod and the inside of the detection main body. Be equipped with current transformer in the clamp, current transformer needs connect the detection main part through the wire, and the wire stretches into again in the detection main part from the inside cavity that penetrates the screw rod of flexible pipe, guarantees to accomplish current detection.

Preferably, a fixing ring is arranged on the outer side of the movable clamp, a plurality of idler wheels are arranged on the outer side of the telescopic pipe, the top end of the insulating rope is fixed on the fixing ring of the movable clamp, and the bottom end of the insulating rope penetrates through each idler wheel and is wound on the winding table. When rotating base rotated at every turn, the length of the insulating rope that changes on the wire winding bench more than or equal to the stroke variation of flexible pipe, rotated the round promptly, the length of insulating rope extension more than or equal to the length of flexible pipe extension for the in-process of telescopic bracket extension and shortening, the insulating rope all keeps the lax state, can not influence the position of activity pincers.

Preferably, the upper end and the lower end of the telescopic pipe are respectively provided with a roller bracket, the roller brackets are fixed on the outer side of the telescopic pipe, and the rollers are rotatably arranged on the roller brackets through pin shafts; and a winding groove is formed in the circumference of the roller, and the insulating rope is arranged in the winding groove. The upper end and the lower end of the telescopic pipe are respectively provided with a roller for guiding the insulating rope, the insulating rope is prevented from being disorderly, the position of the insulating rope can be limited by the winding grooves in the rollers, and the friction force generated when the insulating rope moves is reduced.

Preferably, the detection main body comprises a rectangular box body, and a mounting hole is formed above the box body; the radial section of the rotating base is I-shaped, is arranged in the mounting hole of the box body and can rotate relative to the box body. Rotating base installs on the box body, but also can rotate relative to the box body, can drive the screw rod to realize the extension and the shortening of flexible pipe, can also twine insulating rope in step or loosen insulating rope.

Preferably, be equipped with the display screen on the box body of detection main part, detect the inside detection module that is equipped with of main part, be equipped with the current transformer of punching in the clamp, current transformer is connected to detection module, detection module and display screen electric connection through flexible wire. Current transformer places in the clamp, and the wire is walked from flexible pipe, screw rod inside, and the wire adopts telescopic structure, guarantees under the circumstances of flexible pipe extension, still can normally detect current.

Compared with the prior art, the utility model has the beneficial effects that: the clamp is arranged on the telescopic bracket, the length of the clamp can be changed at will, and the clamp is suitable for detecting wires at different positions; the clamp is prolonged by the screw, and the left volume and the right volume of the telescopic bracket are unchanged and do not touch other components in the extending process; the current detection is a live operation, the stretching process of the clamp is relatively smooth, the condition that the clamp suddenly stretches to collide with other leads and elements is avoided, and the detection safety is ensured; the clamp is opened by the insulating rope, and the clamp is not in contact with the tested lead, so that the tested lead is prevented from being abraded.

Drawings

The following detailed description is made with reference to the accompanying drawings and embodiments of the present invention

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the opened condition of the clamp jaws;

FIG. 3 is a sectional view of the telescopic bracket;

FIG. 4 is an enlarged view of a portion of FIG. 3;

fig. 5 is a structural sectional view of the telescopic bracket in an extended state.

Labeled as: the detection device comprises a detection main body 1, a mounting hole 11, a display screen 12, a rotating base 2, a through hole 21, an extension tube 3, a roller bracket 31, a roller 32, a screw rod 4, a cavity 41, a winding table 5, a fixed clamp 6, a movable clamp 7, a fixed ring 71, a rotating shaft 8 and an insulating rope 9.

Detailed Description

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but 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 should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the utility model, "a number" or "a number" means two or more unless explicitly specified otherwise.

See the drawings. The clamp-type ammeter comprises a detection main body 1, a telescopic bracket and a clamp, wherein the detection main body 1 comprises a rectangular box body, a mounting hole 11 is formed above the box body, and the telescopic bracket is mounted in the mounting hole; the telescopic support is made of insulating materials and comprises a rotary base 2, a telescopic pipe 3 and a screw rod 4, wherein the radial section of the rotary base 2 is I-shaped and is installed in the installation hole 11 of the box body, and the rotary base can rotate relative to the box body and cannot be separated from the installation hole. A winding table 5 is fixed above the rotary base 2, and a screw rod 4 is fixedly arranged above the winding table 5; the telescopic pipe 3 is sleeved outside the screw rod 4, a threaded hole is formed below the telescopic pipe 3 and is in threaded fit with the screw rod 4, the screw rod 4 can be driven to rotate by rotating the base 2, and the telescopic pipe 3 moves up and down along the screw rod 4 through the threaded hole.

The clamp comprises a fixed clamp 6 and a movable clamp 7, the fixed clamp 6 is arranged at the top of the telescopic pipe 3, the movable clamp 7 is connected with the tail end of the fixed clamp 6 through a rotating shaft 8, and the front ends of the movable clamp and the fixed clamp can be closed into a ring structure and can also be opened after being controlled by external force; the rotating shaft 8 is provided with a torsion spring (not shown in the figure), two ends of the torsion spring are respectively abutted against the movable clamp and the fixed clamp, and the torsion spring can enable the movable clamp and the fixed clamp to be always kept in a closed state under an unstressed state.

A fixing ring 71 is arranged on the outer side of the movable clamp 7, a roller wheel bracket 31 is respectively arranged at the upper end and the lower end of the telescopic pipe 3, the roller wheel bracket 31 is fixed on the outer side of the telescopic pipe 3, a roller wheel 32 is rotatably arranged on the roller wheel bracket 31 through a pin shaft, and a winding groove is arranged on the circumference of the roller wheel 32; the top end of the insulating rope 9 is fixed on the fixing ring 71 of the movable clamp 7, and the bottom end of the insulating rope 9 penetrates through each roller 32 and is wound on the winding table 5. The upper end and the lower end of the telescopic pipe are respectively provided with a roller for guiding the insulating rope, the insulating rope is prevented from being disordered, the position of the insulating rope can be limited by a winding groove on the roller, and the friction force generated when the insulating rope moves is reduced. When activity pincers 7 and fixed pincers 6 front ends are closed cyclic annular, insulating rope 9 is in the lax state of not atress, when needs open the clamp, in wire winding platform department, draws insulating rope lower extreme for insulating rope upper end is straight, and then pulls the activity pincers, makes the activity pincers revolute the rotation of axes, and the activity pincers are opened with fixed pincers front end. The insulating rope is loosened, and the movable pliers are closed with the fixed pliers under the action of the torsion spring.

When rotating base 2 rotates at every turn, wire winding platform 5 can twine the insulating rope or loosen insulating rope 9, the extension of insulating rope, shorten with the extension of flexible pipe, shorten and go on in step, and the insulating rope length more than or equal to the stroke variation of flexible pipe that changes on the wire winding platform, rotate the round promptly, the length of insulating rope extension is greater than or equal to the length of flexible pipe extension, make the in-process of telescopic bracket extension and shortening, the insulating rope all keeps the lax state, can not influence the position of activity pincers.

Be equipped with display screen 12 on the box body of detection main part 1, detect the inside detection module that is equipped with of main part, be equipped with the current transformer of punching in the clamp, current transformer is connected to detection module, detection module and display screen electric connection through first wire. The detection main body is the prior art, and the working principles among the internal detection module, the current transformer and the display screen are common technical means in the field.

Meanwhile, the screw rod 4 is of a hollow structure, and a cavity 41 for accommodating a first lead to pass through is formed inside the screw rod; the rotating base 2 and the winding table 5 are both internally provided with through holes 21, and the through holes 21 are communicated with the cavity 41 of the screw rod and the inside of the detection main body 1. The first lead penetrates into a cavity of the screw rod from the interior of the telescopic pipe, then penetrates through holes of the winding table and the rotary base, finally extends into the detection main body, and is connected with the detection module to complete current detection. The first wire is wired from the inside of the telescopic pipe and the screw rod, and the first wire is of a telescopic structure, such as a spring wire, so that the current can still be normally detected under the condition that the telescopic pipe is extended.

When the telescopic tube type clamp is used, the detection main body 1 is held by one hand, the rotating base 2 is rotated by the other hand, the screw rod 4 is driven to rotate by the rotating base 2, the telescopic tube 3 can move upwards along the screw rod 4, and the length of the clamp is prolonged; meanwhile, the rotating base 2 drives the winding table 5 to rotate, the insulating rope 9 is released, the insulating rope 9 is driven by the movable clamp 7 to extend synchronously, the movable clamp 7 and the fixed clamp 6 are in a closed annular structure in an unstressed state, and the insulating rope is in a loose state; when the clamp reaches the detection position, the bottom of the insulating rope 9 is pulled, and the top end of the insulating rope 9 exerts pulling force on the movable clamp 7, so that the movable clamp 7 is opened; after the clamp is opened, the clamp is used for clamping a wire to be detected, then the insulating rope is loosened, the movable clamp and the fixed clamp are immediately closed under the action of the torsion spring to form a ring structure, and the current in the wire can be detected; after the detection module detects the current value, the current value is displayed on the display screen 12; then, the insulating rope 9 is pulled again, the movable clamp 7 is opened, the insulating rope is loosened after the tested lead leaves the clamp, and the movable clamp and the fixed clamp 6 are immediately closed under the action of the torsion spring; then, the base 2 is rotated in the reverse direction, the screw rod 4 drives the telescopic pipe 3 to move downwards, and meanwhile, the winding table 5 winds the insulating rope 9 back, so that the insulating rope is prevented from being knotted in disorder, and finally, the telescopic pipe 3 returns to the lowest point, and is convenient to store.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (7)

1. A novel clamp-on ammeter is characterized in that: the device comprises a detection main body, a telescopic bracket and a clamp, wherein the telescopic bracket comprises a rotary base, a telescopic pipe and a screw rod; the telescopic pipe is sleeved outside the screw rod, and a threaded hole is formed below the telescopic pipe and is in threaded fit with the screw rod; the rotary base drives the screw rod to rotate, and the telescopic pipe moves up and down along the screw rod; the clamp comprises a fixed clamp and a movable clamp, the fixed clamp is arranged at the top of the telescopic pipe, the movable clamp is connected with the tail end of the fixed clamp through a rotating shaft, and the front ends of the movable clamp and the fixed clamp are closed to form a closed annular structure; an insulating rope is fixed on the outer side of the movable clamp, and the bottom end of the insulating rope is wound on the winding table.

2. The novel clamp-on ammeter as defined in claim 1, wherein: the tail ends of the movable pliers and the fixed pliers are provided with torsion springs, the torsion springs are sleeved on the rotating shafts, the movable pliers and the fixed pliers are closed into an annular structure through the torsion springs, and the insulating ropes are in a loose state; the insulating rope can drive the movable pliers to rotate around the rotating shaft, the front ends of the movable pliers and the fixed pliers are opened, and the insulating rope is in a tight state.

3. The novel clamp-on ammeter as defined in claim 1, wherein: the screw rod is of a hollow structure, and a cavity for accommodating a lead to pass through is formed in the screw rod; the rotating base and the winding table are internally provided with through holes which are communicated with the cavity of the screw rod and the inside of the detection main body.

4. The novel clamp-on ammeter as defined in claim 1, wherein: the movable pliers are characterized in that a fixing ring is arranged on the outer side of the movable pliers, a plurality of idler wheels are arranged on the outer side of the telescopic pipe, the top end of the insulating rope is fixed on the fixing ring of the movable pliers, and the bottom end of the insulating rope penetrates through each idler wheel and is wound on the winding table.

5. The novel clamp-on ammeter as defined in claim 4, wherein: the upper end and the lower end of the telescopic pipe are respectively provided with a roller bracket, the roller brackets are fixed on the outer side of the telescopic pipe, and the rollers are rotatably arranged on the roller brackets through pin shafts; and a winding groove is formed in the circumference of the roller, and the insulating rope is arranged in the winding groove.

6. The novel clamp-on ammeter as defined in claim 1, wherein: the detection main body comprises a rectangular box body, and a mounting hole is formed above the box body; the radial section of the rotating base is I-shaped, is arranged in the mounting hole of the box body and can rotate relative to the box body.

7. The novel clamp-on ammeter as defined in claim 6, wherein: the detection device is characterized in that a display screen is arranged on a box body of the detection main body, a detection module is arranged in the detection main body, a feed-through current transformer is arranged in the clamp, the current transformer is connected to the detection module through a telescopic wire, and the detection module is electrically connected with the display screen.

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