Open type current transformer

Abstract

The utility model belongs to the technical field of current transformers, and particularly discloses an open type current transformer which comprises a lower shell and an upper shell, the upper shell is arranged at the top of the lower shell, open grooves are formed in the two sides of the bottom end in the lower shell, meshing holes are formed in the upper portions of the interiors of the open grooves, and the upper portions of the interiors of the open grooves are meshed with the meshing holes. Fastening bolts are in threaded connection with the interiors of the meshing holes, and wiring holes are formed in the two sides of the bottom of the front end of the lower shell correspondingly. According to the open type current transformer, the wire harnesses are inserted into the wiring holes in the two sides respectively, the fastening bolts are screwed into the wiring holes from the lower portion of the open groove, so that metal wires of the wire harnesses are locked in the wiring holes, and the remaining parts of the wire harnesses penetrate through the lantern ring and the circular ring and are spirally wound on the surface of the winding rod respectively; and then an electric appliance port for inputting and outputting current is connected, so that the situation that the wire harness is twisted and overlapped due to overlong wire harness is avoided, and the problem that the wire harness is lack of a pipe bundle is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to an open-type current transformer. Background Art

[0002] The current transformer mainly relies on the principle of electromagnetic induction. It can adjust large current and convert it into small current. It has an iron core inside and an outer ring for the wire harness to wrap around. It can protect and measure the currently connected lines and front-end and rear-end electrical appliances, making it convenient for detection instruments or controllers to control the current.

[0003] In order to facilitate winding and fixing, open-type transformers are often used to control the assembly and disassembly of wire harnesses. Excess wire harnesses are often easy to drag, and there is a lack of a storage and organization structure. The wire harnesses cannot be neatly attached to the predetermined place, and there are twists and knots.

[0004] Now, a new type of open-type current transformer is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an open-type current transformer to solve the problem of the lack of a tube bundle in the wire harness proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an open-type current transformer, comprising a lower shell and an upper shell, the upper shell is arranged on the top of the lower shell, both sides of the bottom end of the interior of the lower shell are provided with slots, and the upper part of the interior of the slot is provided with an engaging hole, and a fastening bolt is threadedly connected in the engaging hole, both sides of the bottom of the front end of the lower shell are provided with wiring holes, a ring is fixed at the center of the bottom of the front end of the lower shell, a wiring harness is inserted in the wiring hole, a support block is fixed at the center of the bottom of the lower shell, and a base is fixed at the top of the support block, reserved holes are longitudinally arranged on both sides of the interior of the base, a circular ring is fixed at the center of the front end of the top of the base, and winding rods are fixed on both sides of the front end of the support block.

[0007] Preferably, the wire harness passes through the collar and the ring, and the wire harness can be wound around the outside of the winding rod.

[0008] Preferably, the fastening bolt can be rotated up and down along the engagement hole, and the fastening bolt can lock the wiring harness in the wiring hole.

[0009] Preferably, a layer of iron core is fixed on the inner side of the lower shell and the upper shell, and a resin skin is attached to the outer wall of the iron core, and protrusions are arranged on the surface of the resin skin. Perforations are arranged around the inner side of the lower shell and the upper shell.

[0010] Preferably, the arc of the iron core is the same as that of the resin outer skin, and the perforations are arranged at equal intervals on the outer edge of the iron core.

[0011] Preferably, a hinge seat is fixed at the top of the left side of the lower housing, and a connecting block is assembled between the hinge seat and the left side of the upper housing. A clamping block is fixed at the lower right corner of the upper housing, and a clamping sleeve is fixed at the upper right corner of the lower housing. A screw hole is arranged between the upper and lower parts inside the clamping block, and a positioning bolt is engaged in the screw hole. A slot is longitudinally arranged inside the clamping sleeve, and a lead screw is fixed at the lower part inside the slot. An internal thread wall is longitudinally arranged inside the positioning bolt.

[0012] Preferably, the upper part of the lead screw is embedded in the positioning bolt, and the outer wall of the lead screw matches the internal thread wall.

[0013] Preferably, the positioning bolt can rotate vertically along the screw hole, and the positioning bolt, the screw hole and the lead screw are arranged concentrically.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: the open-type current transformer not only realizes the arrangement of the wire harness, makes the wire harness easy to slide, but also realizes the convenient opening and closing of the transformer;

[0015] (1) By inserting a wire harness into the wiring holes, inserting the wire harness into the wiring holes on both sides respectively, and screwing in the fastening bolts from below the slot, the metal wires of the wire harness are locked in the wiring holes. The remaining part of the wire harness passes through the collar and the ring and is respectively spirally wound on the surface of the winding rod, and then the electrical ports for input and output current are connected, avoiding the situation of twisting and overlapping due to the overlong wire harness, and the number of winding turns can be changed according to the length of the wire harness;

[0016] (2) By fixing a layer of iron core on the inner sides of both the lower housing and the upper housing, the lower housing and the upper housing are movably assembled together through the hinge seat and the connecting block on the left side, and then locked and fixed through the clamping block and the clamping sleeve. At this time, the wire harness passes through the circular groove formed by the lower housing and the upper housing, is wound in the gaps between the convex grains on the surface of the resin outer skin, and is synchronously inserted into the perforations, which can prevent the wire harness from loosening when the transformer shakes, and will not easily move along the outer wall of the transformer even when impacted;

[0017] (3) By fixing a clamping sleeve at the upper right corner of the lower housing, after closing the lower housing and the upper housing, the positioning bolt is rotated downward along the screw hole in the clamping block, so that the positioning bolt enters the slot of the clamping sleeve and is rotationally sleeved on the surface of the lead screw for locking and fixing, avoiding the lower housing and the upper housing from shaking and opening a certain gap, which is beneficial to maintaining the stability during current adjustment and improving the connection strength between the upper and lower housings. Description of the Drawings

[0018] Figure 1This is a front elevation sectional structure diagram of the utility model;

[0019] Figure 2 This is a front elevation sectional structure diagram of the slotted structure of the utility model;

[0020] Figure 3 This is a front elevation sectional structure diagram of the iron core of the utility model;

[0021] Figure 4 This is a front elevation sectional structure diagram of the ferrule of the utility model.

[0022] In the figure: 1, lower housing; 2, hinge seat; 3, connecting block; 4, upper housing; 5, iron core; 6, perforation; 7, resin outer skin; 8, raised grains; 9, clamping block; 10, ferrule; 11, wiring hole; 12, slot; 13, base; 14, reserved hole; 15, winding rod; 16, support block; 17, ring; 18, wire harness; 19, fastening bolt; 20, meshing hole; 21, collar; 22, screw hole; 23, slot; 24, inner thread wall; 25, lead screw; 26, positioning bolt. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1: Please refer to Figures 1-4 , an open-type current transformer, including a lower housing 1 and an upper housing 4. The upper housing 4 is provided at the top of the lower housing 1. On both sides of the bottom end inside the lower housing 1, slots 12 are provided, and meshing holes 20 are provided above the slots 12. A fastening bolt 19 is threadedly connected in the meshing holes 20. On both sides of the bottom of the front end of the lower housing 1, wiring holes 11 are provided. A collar 21 is fixed at the center of the bottom of the front end of the lower housing 1. A wire harness 18 is inserted into the wiring holes 11. A support block 16 is fixed at the center of the bottom of the lower housing 1, and a base 13 is fixed at the top end of the support block 16. Reserved holes 14 are longitudinally provided on both sides inside the base 13. A ring 17 is fixed at the center of the front end of the top of the base 13. Winding rods 15 are fixed on both sides of the front end of the support block 16;

[0025] The wire harness 18 passes through the collar 21 and the ring 17. The wire harness 18 can be wound around the outside of the winding rod 15. The fastening bolt 19 can be rotated up and down along the meshing hole 20, and the fastening bolt 19 can lock the wire harness 18 in the wiring hole 11;

[0026] Specifically, asFigure 1 and Figure 2 As shown in Figure 2 , the wire harness 18 is respectively inserted into the wiring holes 11 on both sides, and the fastening bolts 19 are screwed in from below the slot 12, thereby locking the metal wires of the wire harness 18 in the wiring holes 11. The remaining part of the wire harness 18 passes through the collar 21 and the ring 17 and is respectively spirally wound on the surface of the winding rod 15, and then the electrical ports for input and output current are connected to avoid the situation of twisting and overlapping of the wire harness 18 due to being too long.

[0027] Embodiment 2: A layer of iron core 5 is fixed on the inner sides of the lower housing 1 and the upper housing 4, and a resin outer skin 7 is attached to the outer wall of the iron core 5. Raised grains 8 are arranged on the surface of the resin outer skin 7. A week of perforations 6 are arranged on the inner sides of the lower housing 1 and the upper housing 4. The iron core 5 and the resin outer skin 7 have the same radian, and the perforations 6 are arranged at equal intervals on the outer edge of the iron core 5;

[0028] Specifically, as Figure 1 and Figure 3 shown, the lower housing 1 and the upper housing 4 are movably assembled together through the hinge seat 2 and the connecting block 3 on the left side, and then locked and fixed through the clamping block 9 and the clamping sleeve 10. At this time, the wire harness 18 passes through the circular groove formed by the lower housing 1 and the upper housing 4, is wound in the gaps between the raised grains 8 on the surface of the resin outer skin 7, and is synchronously inserted into the perforations 6, which can prevent the wire harness 18 from loosening when the current transformer shakes.

[0029] Embodiment 3: The hinge seat 2 is fixed at the top of the left side of the lower housing 1, and a connecting block 3 is assembled between the hinge seat 2 and the left side of the upper housing 4. A clamping block 9 is fixed at the lower right corner of the upper housing 4, and a clamping sleeve 10 is fixed at the upper right corner of the lower housing 1. A screw hole 22 is arranged between the upper and lower parts inside the clamping block 9, and a positioning bolt 26 is meshed and connected in the screw hole 22. A slot 23 is longitudinally arranged inside the clamping sleeve 10, and a lead screw 25 is fixed at the lower part inside the slot 23. An internal thread wall 24 is longitudinally arranged inside the positioning bolt 26;

[0030] The upper part of the lead screw 25 is embedded in the positioning bolt 26, and the outer wall of the lead screw 25 is matched with the internal thread wall 24. The positioning bolt 26 can be vertically rotated along the screw hole 22. The positioning bolt 26, the screw hole 22 and the lead screw 25 are arranged in concentric circles;

[0031] Specifically, as Figure 1 and Figure 4 shown, after closing the lower housing 1 and the upper housing 4, the positioning bolt 26 is rotated downward along the screw hole 22 in the clamping block 9, so that the positioning bolt 26 enters the slot 23 of the clamping sleeve 10 and is rotationally sleeved on the surface of the lead screw 25 for locking and fixing, avoiding the lower housing 1 and the upper housing 4 from shaking and opening a certain gap, thereby being beneficial to maintaining the stability during current adjustment.

[0032] Working principle: When the utility model is in use, after closing the lower housing 1 and the upper housing 4, rotate the positioning bolt 26 downward along the screw hole 22 in the clamping block 9, so that the positioning bolt 26 enters the slot 23 of the bushing 10 and rotates and sleeves on the surface of the lead screw 25 for locking and fixing, avoiding the lower housing 1 and the upper housing 4 from shaking and opening a certain gap, thereby facilitating the maintenance of stability during current adjustment. First, insert the wire harness 18 into the wiring holes 11 on both sides respectively, and screw in the fastening bolt 19 from below the slot 12, thereby locking the metal wires of the wire harness 18 in the wiring holes 11. Pass the remaining part of the wire harness 18 through the collar 21 and the ring 17 and respectively spiral wind it on the surface of the winding rod 15, and then connect the electrical ports for input and output current. The lower housing 1 and the upper housing 4 are movably assembled together through the hinge seat 2 and the connecting block 3 on the left side, and then locked and fixed through the clamping block 9 and the bushing 10. At this time, pass the wire harness 18 through the circular groove formed by the lower housing 1 and the upper housing 4, wind it in the gaps between the raised grains 8 on the surface of the resin outer skin 7, and synchronously insert it into the through holes 6, which can prevent the wire harness 18 from loosening when the mutual inductor shakes.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An open-type current transformer, comprising a lower housing (1) and an upper housing (4), characterized in that: An upper shell (4) is arranged on the top of the lower shell (1), both sides of the bottom end of the lower shell (1) are provided with slots (12), and an engagement hole (20) is arranged above the slot (12), and a fastening bolt (19) is threadedly connected in the engagement hole (20), both sides of the bottom of the front end of the lower shell (1) are provided with wiring holes (11), a ring (21) is fixed at the center of the bottom of the front end of the lower shell (1), and a wiring harness (18) is inserted in the wiring hole (11), a support block (16) is fixed at the center of the bottom of the lower shell (1), and a base (13) is fixed at the top of the support block (16), and both sides of the base (13) are longitudinally provided with reserved holes (14), a circular ring (17) is fixed at the center of the top front end of the base (13), and a winding rod (15) is fixed on both sides of the front end of the support block (16).

2. An open-type current transformer according to claim 1, characterized in that: The wire harness (18) passes through the collar (21) and the ring (17), and the wire harness (18) can be wound around the outside of the winding rod (15).

3. An open-type current transformer according to claim 1, characterized in that: The fastening bolt (19) can be rotated up and down along the engagement hole (20), and the fastening bolt (19) can lock the wiring harness (18) in the wiring hole (11).

4. The open-type current transformer according to claim 1, characterized in that: A layer of iron core (5) is fixed on the inner side of the lower shell (1) and the upper shell (4), and a resin outer skin (7) is attached to the outer wall of the iron core (5). The surface of the resin outer skin (7) is arranged with protrusions (8), and the inner side of the lower shell (1) and the upper shell (4) is arranged with perforations (6) around the periphery.

5. An open-type current transformer according to claim 4, characterized in that: The iron core (5) and the resin outer skin (7) have the same curvature, and the through holes (6) are arranged at equal intervals at the outer edge of the iron core (5).

6. An open-type current transformer according to claim 1, characterized in that: A hinge seat (2) is fixed to the top of the left side of the lower shell (1), and a connecting block (3) is assembled between the hinge seat (2) and the left side of the upper shell (4), a clamping block (9) is fixed to the lower right corner of the upper shell (4), and a clamping sleeve (10) is fixed to the upper right corner of the lower shell (1), a screw hole (22) is arranged between the upper and lower parts of the clamping block (9), and a positioning bolt (26) is meshed and connected in the screw hole (22), a slot (23) is longitudinally arranged inside the clamping sleeve (10), and a screw rod (25) is fixed below the slot (23), and an inner thread wall (24) is longitudinally arranged on the inner side of the positioning bolt (26).

7. An open-type current transformer according to claim 6, characterized in that: The upper part of the screw rod (25) is embedded in the positioning bolt (26), and the outer wall of the screw rod (25) matches the inner thread wall (24).

8. An open-type current transformer according to claim 6, characterized in that: The positioning bolt (26) can be rotated vertically along the screw hole (22), and the positioning bolt (26), the screw hole (22) and the screw rod (25) are arranged in concentric circles.

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