Clamp type digital open-close type current transformer

Abstract

The utility model discloses a clamp type digital open-close type current transformer. According to the technical scheme, the clamp type digital open-close type current transformer comprises a shell, the pair of handle parts is connected through a hinge assembly. The hinge assembly comprises a connecting cylinder rotationally connected with the pair of handle parts, a mounting cavity communicating with the interiors of the pair of handle parts is formed in the connecting cylinder, a pair of driving rods and a driving piece for driving the pair of driving rods to open are rotationally arranged in the mounting cavity, and the driving piece comprises a sliding block which is arranged in the mounting cavity in a sliding mode and abuts against the portion between the pair of driving rods; a spring is propped between the sliding block and the inner wall of the mounting cavity; a through hole communicating the mounting cavity with the outside is further formed in the position, abutting against the spring, of the inner wall of the connecting cylinder, a mounting cylinder is in threaded connection in the through hole, and one end of the spring is located in the mounting cylinder; the jaw can be closed through cooperation of a mechanical structure and the spring, a coil spring is replaced by the spring, the size of the elastic piece is reduced, and a worker can replace, disassemble and assemble the spring more conveniently and rapidly through cooperation of the detachable mounting cylinder arranged on the connecting cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of current detection equipment, in particular to a clamp-type digital open-close current transformer. Background Art

[0002] The current transformer consists of a closed iron core and a coil (induction coil). It is an instrument that converts a large primary current into a small secondary current based on the principle of electromagnetic induction to achieve current measurement. There are many types of current transformers, and the clamp-on current transformer is a type of current transformer. The clamp-on current transformer is a handheld open-close current transformer that can measure current without disconnecting the measured line. It is easy to use and widely used.

[0003] Patent No. (CN200520021741.4) discloses a clamp-type current transformer, which includes a shell consisting of two symmetrical parts, the two parts are connected to form a clamp shape by a pin shaft, an iron core consisting of two symmetrical parts installed in the upper half of the shell, an induction coil wound on the iron core, and a torsion spring is arranged in the lower half of the shell. The center of the torsion spring is sleeved on the pin shaft connecting the two parts of the shell, and the tail end is supported on the inner wall of the two parts of the shell through a block. The elastic force of the torsion spring can realize the opposite rotation of the current transformer to realize the closing of the jaws.

[0004] However, after long-term use, the torsion spring will fatigue, resulting in the jaws not closing tightly, affecting the current detection accuracy of the transformer. Therefore, after the torsion spring is fatigued and worn, the staff needs to disassemble and replace the torsion spring to ensure the normal use of the transformer. However, since the overall volume of the torsion spring is large and it is in contact with both shells, the entire shell needs to be disassembled for disassembly and replacement, which is troublesome and time-consuming, and can easily cause damage to the connection of the shell, affecting the installation of the shell. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a clamp-type digital open-and-close current transformer, which can drive a pair of handle parts of the shell to open and close the jaws through the cooperation of the mechanical structure and the spring. The spring replaces the coil spring, making the replacement and disassembly of the elastic part more convenient and quick.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a clamp-type digital open-and-close current transformer, comprising a pair of hollow shells, the shells comprising a handle portion and a jaw portion, the jaw portion being provided with an iron core wound with an induction coil; the pair of handle portions being rotatably connected via a hinge assembly; the hinge assembly comprising a connecting cylinder rotatably connected to the pair of handle portions, the connecting cylinder being provided with an installation cavity communicated with the interior of the pair of handle portions, a pair of driving rods being rotatably arranged in the installation cavity, one end of the pair of driving rods respectively extending into the pair of handle portions and abutting against the inner wall of the handle portions; further comprising a driving member for driving the pair of driving rods to open, the driving member comprising a slider slidably arranged in the installation cavity and abutting against the pair of driving rods, a spring abutting against the slider and the inner wall of the installation cavity for driving the slider to push the pair of driving rods to open; a through hole communicating the installation cavity with the outside is also provided at the position where the inner wall of the connecting cylinder abuts against the spring, the through hole being threadedly connected with the installation cylinder, and one end of the spring being located in the installation cylinder.

[0007] The utility model is further configured that a pair of driving rods are provided with an arc-shaped guide surface on one side surface relative to the slider, and the guide surface is slidably matched with the slider.

[0008] The utility model is further configured such that the driving rod includes a connecting portion that is rotatably matched with the mounting cavity and coaxially connected, a pair of the connecting portions respectively extend toward a pair of handle portions to form a driving portion, the driving portion abuts against the inner wall of the handle portion, the slider abuts between the pair of driving portions, and the spring is used to control the slider to move toward the connecting portion.

[0009] The utility model is further configured that a rotating shaft is arranged on the sliding block, and abutment cylinders corresponding to a pair of driving rods are rotatably arranged on the rotating shaft.

[0010] The utility model is further configured such that the connecting cylinder includes a bottom cover and a top cover which are respectively rotatably matched with one side of the outer shell, the bottom cover is provided with a plurality of connecting plates which form a cylindrical structure and penetrate the outer shell, the top cover is connected to the bottom cover by being threadedly connected to the connecting plate, so that a pair of outer shells are rotatably arranged between the top cover and the bottom cover.

[0011] In summary, the beneficial effects of the utility model are:

[0012] Compared with the prior art, the present application replaces the original coil spring structure with a pair of drive rods and a slider driven by a spring, thereby reducing the volume of the elastic member. At the same time, an installation cylinder is arranged on the connecting cylinder, and by removing the installation cylinder, it is convenient for the staff to disassemble and replace the spring. Compared with the existing structure, there is no need to disassemble the entire shell, and the replacement of the spring is faster and more convenient, and damage to the shell during the disassembly process is avoided, which affects the installation of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural diagram of this embodiment.

[0014] Figure 2 It is the internal structure diagram of this embodiment.

[0015] Figure 3 yes Figure 2 A partial enlarged view of .

[0016] Figure 4 2 is a diagram showing the jaws of this embodiment being closed.

[0017] Figure 5 It is a state diagram of the jaws of this embodiment being opened.

[0018] Figure numerals: 1. outer shell; 2. handle part; 3. jaw part; 40. iron core; 4. hinge assembly; 41. connecting cylinder; 411. bottom cover; 412. top cover; 413. connecting plate; 42. mounting cavity; 43. driving rod; 431. connecting part; 432. driving part; 5. driving member; 51. slider; 511. rotating shaft; 512. abutting cylinder; 52. spring; 53. mounting cylinder; 6. guide surface. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1-5 As shown, this embodiment discloses a clamp-type digital split-type current transformer, including a pair of symmetrically arranged housings 1, each of the pair of housings 1 includes an upper shell and a lower shell, and the upper shell and the lower shell are connected by a snap-on connection; the housing 1 is hollow and includes a handle portion 2 and a jaw portion 3, a semicircular iron core 40 is arranged in the jaw portion 3, and an induction coil is wrapped outside the iron core 40; the current of the wire can be detected by the iron core 40 and the induction coil; and the user can open the jaw portion 3 by applying force to the handle portion 2 of the pair of shells.

[0021] like Figure 2-3As shown, a pair of shells are rotatably matched with each other through a hinge assembly 4, and the hinge assembly 4 includes a connecting tube 41, and the connecting tube 41 includes a bottom cover 411 and a top cover 412. The bottom cover 411 and the top cover 412 are both provided with arc-shaped limit plates on one side relative to the shell, and an annular groove that is plugged into the limit plate is provided on the side of the shell relative to the cover, and the two shells can be rotatably matched with each other through the hinge assembly through the plugging of the annular groove and the limit plate; a plurality of connecting plates 413 that pass through the two shells are also provided on the bottom cover 411, and the plurality of connecting plates 413 are arc-shaped, forming a cylindrical structure on the bottom cover 411, and threads are provided on the surface of the connecting plates 413, and the connecting plates 413 are threadedly connected to the top cover 412 through threads, so that the top cover 412 and the bottom cover 411 can realize the connection and fixation of the two shells.

[0022] The connecting tube 41 is provided with a mounting cavity 42 connected to the inside of the pair of handle parts 2, and a pair of driving rods 43 are rotatably connected in the mounting cavity 42. The pair of driving rods 43 each include a connecting portion 431 rotatably matched with the mounting cavity 42 and a driving portion 432 respectively extending into the pair of handle parts 2, and the driving portion 432 abuts against the inner wall of the handle part 2. The two connecting portions 431 are rotatably connected by a connecting rod arranged in the mounting cavity 42. The two connecting portions 431 are arranged concentrically, so that the pair of driving rods 43 are arranged at an angle; it also includes a driving member 5 abutting against the opposite side of the pair of driving rods 43, and the driving member 5 includes a sliding member arranged in the mounting cavity 42. The slider 51 is slidably arranged in the installation cavity 42 through a slide groove arranged on the bottom cover 411. A pair of abutment cylinders 512 corresponding to the positions of the driving rods 43 are rotatably arranged on the slider 51 through the rotating shaft 511. The abutment cylinders 512 can abut against the opposite side of the pair of driving rods 43, and also include a spring 52 that drives the slider 51 to slide toward the hinge of the pair of driving rods 43. One end of the spring 52 abuts against the slider 51. The spring 52 can drive the slider 51 to move toward the pair of driving rods 43, so that the abutment cylinder 512 controls the pair of driving rods 43 to open, so that the driving part 432 of the driving rod 43 drives the handle to open outward, thereby realizing the automatic closing of the jaws; it is as shown in Figure 4 Status shown.

[0023] When the staff presses the handle portion 2 of the pair of shells 1 to open the jaw portion 3, the handle portion 2 will drive the driving rod 43 to swing close to each other with the connecting portion 431 as the center. During the swinging process, an arc-shaped guiding surface 6 is provided on the side of the driving rod 43 relative to the abutment tube 512. The arc-shaped guiding surface gradually narrows from the connecting portion 431 to the driving portion 432. In the process of the driving rods 43 approaching each other, the arc-shaped guiding surface 6 will exert a downward force on the abutment tube 512, so that the abutment tube 512 overcomes the force of the spring 52 and moves away from the connecting portion 431 of the driving rod 43, so that the abutment tube will not hinder the driving rods from approaching each other, so that the jaws can be opened smoothly.

[0024] A through hole corresponding to the position of the spring 52 is provided on one side of the connecting tube 41, and the through hole can connect the installation cavity 42 with the outside world. A mounting tube 53 is threadedly connected to the through hole, and one end of the spring 52 is located in the mounting tube 53; when the user needs to disassemble and replace the spring 52, it is only necessary to disassemble the mounting tube 53, and there is no need to disassemble the entire shell, which makes the replacement of the spring 52 more convenient and quick, and also avoids damage to the shell during the disassembly and assembly process.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamp-on digital split-type current transformer, comprising a pair of hollow housings (1), wherein the housings (1) comprise a handle portion (2) and a jaw portion (3), wherein an iron core (40) wound with an induction coil is arranged in the jaw portion (3); characterized in that: The pair of handle parts (2) are rotatably connected to each other via a hinge assembly (4); the hinge assembly (4) comprises a connecting tube (41) rotatably connected to the pair of handle parts (2); a mounting cavity (42) communicating with the inside of the pair of handle parts (2) is arranged in the connecting tube (41); a pair of driving rods (43) are rotatably arranged in the mounting cavity (42); one end of the pair of driving rods (43) respectively extends into the pair of handle parts (2) and abuts against the inner wall of the handle parts (2); and a driving member (5) for driving the pair of driving rods (43) to open ), the driving member (5) includes a slider (51) slidably arranged in the installation cavity (42) and abutting against a pair of driving rods (43), and a spring (52) is abutted between the slider (51) and the inner wall of the installation cavity (42) to drive the slider (51) to push the pair of driving rods (43) to open; a through hole connecting the installation cavity (42) and the outside is also provided at the position where the inner wall of the connecting tube (41) abuts against the spring (52), and the installation tube (53) is threadedly connected to the through hole, and one end of the spring (52) is located in the installation tube (53).

2. A clamp-on digital split-type current transformer according to claim 1, characterized in that: An arc-shaped guide surface (6) is provided on one side of the pair of driving rods (43) facing the slider (51), and the guide surface (6) is slidably matched with the slider (51).

3. A clamp-on digital split-type current transformer according to claim 1, characterized in that: The driving rod (43) comprises a connecting portion (431) rotatably matched with the mounting cavity (42) and coaxially connected, a pair of the connecting portions (431) respectively extending in the direction of a pair of handle portions (2) to form a driving portion (432), the driving portion (432) abutting against the inner wall of the handle portion (2), the sliding block (51) abutting between the pair of driving portions (432), and the spring (52) being used to control the sliding block (51) to move in the direction of the connecting portion (431).

4. A clamp-on digital split-type current transformer according to claim 3, characterized in that: The slider (51) is provided with a rotating shaft (511), and an abutment cylinder (512) corresponding to a pair of driving rods (43) is rotatably provided on the rotating shaft (511).

5. A clamp-on digital split-type current transformer according to claim 3, characterized in that: The connecting tube (41) comprises a bottom cover (411) and a top cover (412) which are respectively rotatably matched with one side of the outer shell (1); the bottom cover (411) is provided with a plurality of connecting plates (413) which form a cylindrical structure and penetrate the outer shell (1); the top cover (412) is connected to the bottom cover (411) by being threadedly connected to the connecting plates (413), so that a pair of outer shells (1) are rotatably arranged between the top cover (412) and the bottom cover (411).

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