Current transformer convenient to assemble

Abstract

The utility model relates to the technical field of current transformers, in particular to a current transformer convenient to assemble, which comprises a shell and an assembling and positioning assembly used for fixing the shell, the assembling and positioning assembly comprises a support, a binding belt and a supporting wheel, the top of the support locks and fixes the shell through the binding belt, and the supporting wheel is arranged on the top of the support. The shell and the supporting wheels can rotate relative to each other; a plurality of limiting protruding blocks distributed at equal intervals are arranged on the inner wall of the binding belt, and a plurality of limiting grooves distributed at equal intervals are annularly formed in the outer wall of the shell. Mounting holes are further formed in the two ends of the support. The beneficial effects of the utility model are that the current transformer can rotate freely after being fixed so as to adjust the position of the wiring terminal and find an angle which is most convenient for wiring; moreover, after wiring is completed, the external wiring harness can be prevented from being bent by adjusting the angle of the current transformer, so that the wiring harness is prevented from being broken, and the risk of wire breakage and electric leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a current transformer which is easy to assemble. Background Art

[0002] Current transformers are widely used in electrical protection devices, such as leakage protection devices, arc fault protection devices, etc.

[0003] With the increasing variety of household appliances, electrical protection devices are playing an increasingly important role in protecting property and ensuring personal safety.

[0004] Important role; its principle is based on the principle of electromagnetic induction. The current transformer is composed of a closed iron core and a winding. Its primary winding has very few turns and is connected in series in the circuit of the current to be measured. Therefore, it often has the entire current of the circuit flowing through it. The secondary winding has more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer is working, its secondary circuit is always closed. Therefore, the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to short circuit.

[0005] Existing current transformers all have two mounting feet fixed on their lower parts. During installation, holes are pre-drilled on the wall or equipment, and then the mounting feet are fixed with screws to achieve installation. However, when installed in some narrow locations, it is difficult for the external wiring harness to connect to the terminal blocks of the current transformer. In addition, since the angle cannot be adjusted after fixed installation, in some cases, even if the external wiring harness is connected to the current transformer, the external wiring harness will be bent at a large angle, which can easily cause the wiring harness to break, seriously reducing the service life of the wiring harness. In addition, the broken wiring harness will also have the risk of leakage.

[0006] In order to address the above problems, there is an urgent need for a current transformer that is easy to assemble. Utility Model Content

[0007] The purpose of the present utility model is to provide a current transformer that is easy to assemble, so as to solve the problems raised in the above background technology.

[0008] To achieve the above object, a current transformer that is easy to assemble is provided, comprising a housing and an assembly positioning assembly for fixing the housing. The housing is annular in structure, an iron core is provided inside the housing, and a winding is wound around the iron core.

[0009] The assembly and positioning assembly includes a support, a restraining belt, and a support wheel. The top of the support is locked and fixed to the shell by the restraining belt. The support wheel is located on the front and back of the support and supports the shell at the same time. The shell and the support wheel are rotatable.

[0010] The inner wall of the restraint belt is provided with a plurality of equally spaced limiting protrusions, and the outer wall of the shell is provided with a plurality of equally spaced limiting grooves in an annular shape;

[0011] Mounting holes are also provided at both ends of the support.

[0012] Furthermore, the restraint belt is fixedly connected to the support. The restraint belt is made of flexible steel and can be flexibly bent. Clamps are provided at both ends of the restraint belt. Both ends of the restraint belt are locked and fixed by bolts on the clamps.

[0013] Furthermore, the width of the restraining belt is smaller than the thickness of the shell, the restraining belt is wrapped around the middle area of ​​the shell, the supporting wheels are located on both sides of the restraining belt, and the curved surface of the supporting wheels is tangent to the curved surface of the shell.

[0014] Furthermore, the housing is provided with connection terminals.

[0015] Furthermore, a plurality of the limiting protrusions extend from both ends of the restraint belt toward the middle, and no limiting protrusions are provided in the middle area of ​​the restraint belt.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Compared with the traditional assembly fixing structure, the current transformer in the present application can be rotated freely after being fixed to adjust the position of the terminal block and find the most convenient angle for wiring. Moreover, after the wiring is completed, the angle of the current transformer can be adjusted to prevent the external wiring harness from bending, thereby preventing the wiring harness from breaking and eliminating the risk of wire breakage and leakage.

[0018] 2. Several limiting protrusions are provided at both ends of the restraint belt extending toward the middle. When the restraint belt is locked, the limiting protrusions can be stuck into the limiting grooves on the surface of the shell to prevent the current transformer from axial rotation. However, there are no limiting protrusions in the middle area of ​​the restraint belt. In this way, when the restraint belt is unfolded, the current transformer can rotate freely. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the structural assembly drawing of the utility model;

[0020] Figure 2 This is an exploded view of the structure of the present invention.

[0021] The meaning of each number in the figure is:

[0022] Shell; 2. Assembly positioning component; 201. Support; 202. Restraint belt; 203. Support wheel; 3. Limiting protrusion; 4. Limiting groove; 5. Mounting hole; 6. Clamp; 7. Bolt; 8. Terminal block. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a," "an," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0025] See also Figure 1-2 As shown, a current transformer that is easy to assemble is provided, comprising a housing 1 and an assembly positioning assembly 2 for fixing the housing 1. The housing 1 is provided with a terminal 8. The housing 1 is annular in structure. An iron core is provided inside the housing 1, and a winding is wound around the iron core.

[0026] The assembly and positioning component 2 includes a support 201, a restraining belt 202, and a support wheel 203. The top of the support 201 is locked and fixed to the housing 1 by the restraining belt 202. The support wheels 203 are located on the front and back of the support 201 and support the housing 1 at the same time. When the restraining belt 202 is loosened, the housing 1 can rotate on the surface of the support wheel 203. At this time, the position of the terminal 8 on the housing 1 will change, which can facilitate the adjustment of the wiring harness or wiring angle to facilitate assembly or installation.

[0027] It is worth noting that the main function of the restraint belt 202 is to fix the shell 1 so that it is stationary. In order to prevent the shell 1 from rotating axially, a number of equally spaced limiting protrusions 3 are provided on the inner wall of the restraint belt 202, and a number of equally spaced limiting grooves 4 are provided in an annular shape on the outer wall of the shell 1. When the restraint belt 202 is wrapped around the surface of the shell 1, the limiting protrusions 3 are locked into the limiting grooves 4, thereby preventing the shell 1 from rotating axially.

[0028] Reference here Figure 2 , you can see that in Figure 2In the figure, the limiting protrusions 3 are extended from both ends of the restraint belt 202 toward the middle, and no limiting protrusions 3 are set in the middle area of ​​the restraint belt 202. In this way, when the restraint belt 202 is loosened, the limiting protrusions 3 at both ends of the restraint belt 202 are disengaged from the limiting grooves 4, and the shell 1 can rotate in the middle area of ​​the restraint belt 202.

[0029] Mounting holes 5 are provided at both ends of the support 201 , and bolts are passed through the mounting holes 5 to mount and fix the entire device.

[0030] It is worth noting that the restraint belt 202 is fixedly connected to the support 201. The restraint belt 202 is made of flexible steel and can be flexibly bent. Clamps 6 are provided at both ends of the restraint belt 202. The two ends of the restraint belt 202 are locked and fixed by bolts 7 on the clamps 6. When the bolts 7 are unscrewed, the restraint belt 202 will unfold and the limiting protrusion 3 will be disengaged from the limiting groove 4.

[0031] The width of the restraining belt 202 is smaller than the thickness of the shell 1 . The restraining belt 202 is wrapped around the middle area of ​​the shell 1 . The supporting wheels 203 are located on both sides of the restraining belt 202 . The curved surface of the supporting wheels 203 is tangent to the curved surface of the shell 1 .

[0032] On the basis of the above embodiment, a transparent protective cover is further provided on the surface of the connection terminal 8 , and the protective cover is opened and closed by a pin.

[0033] Assembly adjustment process:

[0034] When assembling the device, first fix the assembly positioning component 2 to the required installation position by screwing it through the mounting hole 5, then unscrew the bolt 7 and unfold the binding belt 202. At this time, you can freely rotate the housing 1 and adjust the terminal 8 on the housing 1 to a position convenient for wiring. Then, wrap the binding belt 202 around the surface of the housing 1 again and tighten the bolt 7.

[0035] After the bolt 7 is tightened, the limiting protrusion 3 on the inner wall of the restraining belt 202 will be stuck in the limiting groove 4 on the surface of the shell 1 to lock the shell 1 and prevent the shell 1 from axial rotation;

[0036] In actual application, after wiring is completed, the external wiring harness may be bent. In this case, the angle of the housing 1 can be readjusted to make the external wiring harness straight, and then the restraining belt 202 can be tightened.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A current transformer that is easy to assemble, comprising a housing (1) and an assembly positioning component (2) for fixing the housing (1), characterized in that: The shell (1) has a circular ring structure, an iron core is provided inside the shell (1), and a winding is wound around the iron core; The assembly positioning component (2) comprises a support (201), a restraining belt (202) and a supporting wheel (203); the top of the support (201) is locked and fixed to the shell (1) via the restraining belt (202); the supporting wheel (203) is located on the front and back sides of the support (201) and supports the shell (1) at the same time; the shell (1) and the supporting wheel (203) are rotatable; The inner wall of the restraint belt (202) is provided with a plurality of equally spaced limiting protrusions (3), and the outer wall of the housing (1) is provided with a plurality of equally spaced limiting grooves (4) in an annular shape. Mounting holes (5) are also provided at both ends of the support (201).

2. A current transformer that is easy to assemble according to claim 1, characterized in that: The restraining belt (202) is fixedly connected to the support (201). The restraining belt (202) is made of flexible steel and can be flexibly bent. Clamps (6) are provided at both ends of the restraining belt (202). The two ends of the restraining belt (202) are locked and fixed by bolts (7) on the clamps (6).

3. The current transformer that is easy to assemble according to claim 2, characterized in that: The width of the restraining belt (202) is smaller than the thickness of the shell (1), the restraining belt (202) is wound around the middle area of ​​the shell (1), the supporting wheels (203) are located on both sides of the restraining belt (202), and the curved surface of the supporting wheels (203) is tangent to the curved surface of the shell (1).

4. The current transformer that is easy to assemble according to claim 3, characterized in that: The housing (1) is provided with a connection terminal (8).

5. The current transformer that is easy to assemble according to claim 4, characterized in that: Several of the limiting protrusions (3) extend from both ends of the restraining belt (202) toward the middle, and no limiting protrusions (3) are provided in the middle area of ​​the restraining belt (202).

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