A high-precision mutual inductor

Abstract

The utility model discloses a kind of high-precision mutual inductors, comprising: framework, coil, thread turn, two terminals, shell, wherein, framework is equipped with coil bin and two plug-in holes;Coil is embedded in coil bin;Thread turn is threaded in coil bin;Two terminals are respectively plugged in two plug-in holes, and respectively correspond to the both ends of thread turn;Framework is embedded in shell.This mutual inductor can use the special structure of framework, solve the problem of temporary fixation of coil and terminal in assembly process, optimize assembly process, effectively improve the assembly accuracy of mutual inductor.

Description

Technical Field

[0001] This utility model belongs to the field of instrument transformer technology, and specifically relates to a high-precision instrument transformer. Background Technology

[0002] Currently available instrument transformers present numerous inconveniences during assembly, affecting assembly accuracy. For example, the difficulty in securing the copper components after welding the coiled wire can lead to displacement, further complicating manufacturing and increasing assembly errors. The coil requires winding the coiled wire for enclosure, which can cause coil displacement after installation, resulting in increased errors and reduced insulation performance. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model discloses a high-precision current transformer, comprising: a frame, a coil, a through-wire, two terminals, and a housing, wherein the frame is provided with a coil compartment and two insertion holes; the coil is embedded in the coil compartment; the through-wire passes through the coil compartment; the two terminals are respectively inserted into the two insertion holes and respectively connected to the two ends of the through-wire; the frame is embedded in the housing.

[0004] As an optional implementation, the opening end of the housing is provided with two side slots, and the outer sides of the two terminals are respectively embedded in the two side slots.

[0005] As an optional implementation, the coil compartment has an annular groove structure, including an inner ring wall, an outer ring wall, and a bottom wall. The inner ring wall and the outer ring wall are coaxial, and the threaded wire passes through the inner ring wall into the coil compartment.

[0006] As an optional implementation, the outer ring wall is provided with a left boss, a right boss, and a front boss, which respectively abut against the three inner sidewalls of the outer shell.

[0007] As an optional implementation, each end of the front boss is provided with a plug hole, and the direction of the plug hole is consistent with the opening direction of the coil compartment and the opening direction of the outer shell.

[0008] As an alternative implementation, the terminal includes a root and a head, with the root end being narrowed and the head end being widened.

[0009] As an optional implementation, the narrowed section at the root passes through the insertion hole. The portion of the narrowed section that extends beyond the insertion hole after passing through it is connected to both ends of the threaded wire.

[0010] As an optional implementation, the opening end of the housing is provided with two side slots, and the widened head portions of the two terminals are respectively embedded in the two side slots.

[0011] As an optional implementation, the front side of the front boss abuts against the front inner wall of the housing, and the left and right sides of the front boss also abut against the left and right inner walls of the housing, respectively.

[0012] As an optional implementation, a lead wire fixing groove is also provided on the outer ring wall. The lead wire fixing groove is a hollow protrusion protruding outward on the outer side of the outer ring wall, and the hollow part of the hollow protrusion is connected to the wire coil compartment.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: From a product assembly perspective, existing current transformers requiring coil windings present challenges during assembly, such as difficulty in securing the welded terminals of the coil windings. Furthermore, the coil windings can cause instability during coil assembly, leading to issues with production efficiency and product quality. This invention discloses a high-precision current transformer structure that protects and limits the coil by incorporating a coil compartment within the built-in frame. Insertion holes on the frame secure the terminals, thus solving the problem of temporary coil and terminal fixation during assembly. This prevents subsequent assembly processes from affecting the already assembled coil and terminals, effectively improving the assembly efficiency and accuracy of the current transformer. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an overall view of the current transformer.

[0016] Figure 2 This is a diagram showing the skeletal structure.

[0017] Figure 3 This is a diagram showing the fit and arrangement of the components related to the skeleton.

[0018] Figure 4 This is a diagram showing the connection relationship between the through-wire and the terminal.

[0019] Figure 5 This is a diagram illustrating the fit between the housing and the terminals.

[0020] Explanation of key figure labels: 1. Skeleton; 10. Wire coil compartment; 11. Inner ring wall; 12. Outer ring wall; 121. Left side boss; 122. Right side boss; 123. Front boss; 1231. Plug hole; 124. Lead wire fixing groove; 2. Wire coil; 3. Through-wrap wire; 4. Terminal; 41. Root; 42. Head; 5. Outer shell; 51. Side slot. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0027] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0028] See Figure 1 and Figure 2 This utility model discloses a high-precision current transformer, comprising: a frame 1, a coil 2, a through-wire 3, two terminals 4, and a housing 5. The frame 1 is provided with a coil compartment 10 and two insertion holes 1231; the coil 2 is embedded in the coil compartment 10; the through-wire 3 passes through the coil compartment 10; the two terminals 4 are respectively inserted into the two insertion holes 1231 and respectively connected to the two ends of the through-wire 3; the housing 5 has two side slots 51 at its open end, and the outer sides of the two terminals 4 are respectively embedded in the two side slots 51; the frame 1 is embedded in the housing 5.

[0029] The high-precision current transformer disclosed in this embodiment solves the problem of temporary fixation of the coil 2 and terminal 4 during assembly by using the frame 1 built into the housing 5, the coil compartment 10 provided on the frame 1 to protect the coil 2 and limit the coil 2, and the plug holes 1231 provided on the frame 1 to fix the terminal 4. This avoids the subsequent assembly process from affecting the already assembled coil 2 and terminal 4, and effectively improves the assembly efficiency and assembly accuracy of the current transformer.

[0030] See Figure 2 As can be seen, the coil hopper 10 has an annular groove structure, including an inner annular wall 11, an outer annular wall 12, and a bottom wall. The inner annular wall 11 and the outer annular wall 12 are coaxial. It should be noted that the use of annular wall structures for both the inner annular wall 11 and the outer annular wall 12 of the coil hopper 10 has three advantages: First, the annular space formed by the inner annular wall 11 and the outer annular wall 12 of the coil hopper 10 allows the coil 2 to be wound in a circular shape within the coil hopper 10, avoiding large-angle bending and indirectly reducing the probability of damage to the coil 2; Second, it can disperse any local radial pressure to the entire annular wall, reducing local pressure on the annular wall, avoiding deformation of the annular wall, greatly improving the support of the coil hopper 10, and effectively protecting the coil 2 from damage; Third, by setting the wall surface to be annular while ensuring the volume of the coil hopper 10, the surface area can be reduced, thereby reducing raw material consumption and saving production costs.

[0031] See Figure 3As can be seen, the inner ring wall 11 is also a hollow ring wall structure, and the threaded wire 3 passes through the hollow part of the inner ring wall 11. This ring wall structure has three advantages: first, the hollow structure of the inner ring wall 11 provides ample operating space for the assembly or replacement of the threaded wire 3; second, during the process of threading the wire 3 through the coil 2, the ring wall structure provides protection for the inner ring of the coil 2, preventing scratches or even snagging, effectively improving the production yield and efficiency.

[0032] See Figure 1 The outer ring wall 12 is also provided with an outwardly protruding front boss 123, a left boss 121, and a right boss 122. The three sides of the front boss 123 respectively abut against the three inner sidewalls of the outer shell 5; the left boss 121 and right boss 122 on the outer ring wall 12 are arranged opposite each other and abut against the left and right inner sidewalls of the outer shell 5 respectively. The advantage of this arrangement is that the combined positional arrangement of the three bosses—left boss 121, right boss 122, and front boss 123—strengthens the overall restraining effect of the outer shell 5 on the frame 1.

[0033] Specifically, with Figure 1 With reference to the direction shown, the front side (i.e., the lower side) of the front boss 123 abuts against the front inner wall (i.e., the lower inner wall) of the outer casing 5, the left side of the front boss 123 and the left side of the left boss 121 abut against the left inner wall of the outer casing 5, and the right side of the front boss 123 and the left side of the right boss 122 abut against the right inner wall of the outer casing 5.

[0034] See Figure 2 Each end of the front boss 123 is provided with a plug hole 1231, and the direction of the two plug holes 1231 is consistent with the opening direction of the wire coil compartment 10 and the opening direction of the outer shell 5. There are two advantages to this arrangement: first, it unifies the assembly direction of all plug-in or inlaid parts, which facilitates assembly; second, this arrangement makes the mating parts of the parts face the same direction, so that if there is a misfit or improper fit, it is easy to find and correct.

[0035] See Figure 3 and Figure 4 Terminal 4 includes a root 41 and a head 42. The root 41 is narrowed at the end, and the head 42 is widened at the end. The narrowed section of the root 41 of terminal 4 is inserted into the insertion hole 1231. This arrangement is intended to temporarily fix terminal 4 to the frame 1. The purpose of this step is to ensure that the relative position between terminal 4 and frame 1 remains unchanged before assembly is completed, thus preventing the displacement of components during assembly and thus avoiding a decrease in the assembly accuracy of the current transformer.

[0036] The root 41 of terminal 4 is narrowed at the point where it passes through the insertion hole 1231, so that the portion of terminal 4 that still protrudes after passing through the insertion hole 1231 connects to the through-wire 3. The purpose of this design is that after penetrating the front boss 123, terminal 4 is limited on one side by the unnarrowed portion and on the other side by the through-wire 3, further securing terminal 4 to the frame 1 after it is inserted into the front boss 123, thus improving assembly stability. (See reference...) Figure 5 Each side of the outer casing 5 has a side slot 51, which extends from the side of the outer casing 5 to the opening of the outer casing 5. The widened portions of the heads (42) of the two terminals 4 are correspondingly embedded in the side slots 51 of the outer casing 5. Because the terminals 4 are rooted in the frame 1, and the frame 1 is confined to the closed area enclosed by the inner sidewall of the outer casing 5, it is preferable that the heads 42 of the terminals 4 are widened outward to break through the range of the inner sidewall of the outer casing 5 and fit into the side slots 51 on the outer casing 5. See reference Figure 1 Here, the locking of terminal 4 and frame 1 is integrated, meaning that the outer shell 5 indirectly limits the front-to-back direction of frame 1 by limiting terminal 4. Combined with the aforementioned left-side boss 121 and right-side boss 122, this completes the left-to-right direction limitation of frame 1 by the outer shell 5. This configuration allows the outer shell 5 to limit frame 1 in four directions (front, back, left, and right), further improving assembly accuracy and product stability.

[0037] See Figure 2 and Figure 3 The outer ring wall 12 of the skeleton 1 is provided with a hollow protrusion that protrudes outward. This hollow protrusion is the lead wire fixing groove 124, which is used to fix the lead wire of the coil 2. The lead wire fixing groove 124 has two functions: first, to fix the lead wire, and second, to facilitate the lead wire to be led out from this space.

[0038] This invention significantly improves the assembly stability of components such as the transformer frame by modifying them. It achieves a highly efficient overall improvement through a combination of minor local improvements and coordinated coordination among all parts. This not only reduces costs and increases efficiency in assembly and production but also enhances both stability and precision in product quality, demonstrating substantial features and significant progress compared to existing technologies.

Claims

1. A high-precision current transformer, comprising: The frame is provided with a wire coil compartment and two plug-in holes; A coil, wherein the coil is embedded in the coil compartment; A threading wire, wherein the threading wire is inserted into the wire package compartment; Two terminals are respectively inserted into two insertion holes and respectively connected to the two ends of the through wire; The outer shell, and the skeleton is embedded in the outer shell.

2. The high-precision current transformer according to claim 1, characterized in that, The outer shell opening has two side slots, and the outer sides of the two terminals are respectively embedded in the two side slots.

3. The high-precision current transformer according to claim 1, characterized in that, The wire package compartment has an annular groove structure, including an inner annular wall, an outer annular wall, and a bottom wall. The inner annular wall and the outer annular wall are coaxial, and the through-wire passes through the inner annular wall into the wire package compartment.

4. The high-precision current transformer according to claim 3, characterized in that, The outer ring wall is provided with a left protrusion, a right protrusion, and a front protrusion. The left protrusion, the right protrusion, and the front protrusion abut against the three corresponding inner sidewalls of the outer shell.

5. The high-precision current transformer according to claim 4, characterized in that, Each end of the front boss is provided with a plug-in hole, and the direction of the plug-in hole is consistent with the opening direction of the coil compartment and the opening direction of the outer shell.

6. The high-precision current transformer according to claim 2, characterized in that, The terminal includes a root and a head, with the root end being narrowed and the head end being widened.

7. The high-precision current transformer according to claim 6, characterized in that, The narrowed section at the root passes through the insertion hole, and the portion of the narrowed section at the root that extends beyond the insertion hole is respectively connected to both ends of the through-wire.

8. The high-precision current transformer according to claim 6, characterized in that, The widened portion of the head is embedded in the side slot.

9. The high-precision current transformer according to claim 4, characterized in that, The front side of the front boss abuts against the front inner wall of the housing, and the left and right sides of the front boss also abut against the left and right inner walls of the housing, respectively.

10. The high-precision current transformer according to claim 3, characterized in that, The outer ring wall is also provided with a lead wire fixing groove, which is a hollow protrusion protruding outward on the outer side of the outer ring wall. The hollow part of the hollow protrusion is connected to the wire coil compartment.

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