A universal terminal fixing fixture for current transformers

Abstract

This utility model discloses a universal terminal fixing fixture for current transformers, including a main board, a positioning cylinder, and terminal positioning components. The main board consists of two angled strip-shaped mounting plates connected by a connecting plate. The positioning cylinder is fixedly connected to the connecting plate. Multiple terminal positioning components are provided on the mounting plates. Each terminal positioning component includes three through holes and a pair of baffles. The three through holes are arranged in an isosceles triangle. The through hole at the apex, in conjunction with the pair of baffles, is used for positioning and fixing non-tap secondary terminal blocks. The two through holes at the base apex are used for positioning and fixing tapped secondary terminal blocks. This utility model's fixture can fix both tapped and non-tap terminals at the same location, achieving versatility, reducing resource waste and the difficulty of selecting fixtures, improving work efficiency, facilitating fixture management, and significantly reducing fixture management costs.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for current transformer manufacturing, specifically to a terminal fixing tooling that can be used universally for the same model of shell-type current transformer with the secondary terminal as the terminal. Background Technology

[0002] Shell-type current transformers use an ABS flame-retardant or 304 stainless steel shell. The shell acts as a mold, into which the coil is placed, and polyurethane is poured in. The secondary winding consists of leads and terminals. The resin curing time is short, resulting in high efficiency and an aesthetically pleasing appearance, making it an indoor product. When the secondary winding is terminal-based, terminal positioning fixtures are needed to assist in positioning the terminals. The number of terminals depends on the parameters of the customer's order, which may result in different winding numbers and different terminal numbers per winding, leading to diverse terminal arrangements. Current technical solutions involve developing corresponding terminal fixing fixtures for specific terminal numbers. For the same model, different terminal numbers (e.g., 4 / 6 / 8 / 9 / 10… terminals), or different ratio combinations with the same number of terminals (e.g., 12 terminals), may result in 4 windings being tapped or 6 windings being untapped. Alternatively, there could be combinations such as five windings with three untapped windings and two tapped windings. The secondary terminals of the tapped windings correspond to one type of tooling, while the secondary terminals of the untapped windings correspond to another type of tooling. When tapped and untapped windings are arranged and combined, a large number of combinations are generated. At this time, different terminal toolings are required for different situations, which increases the tooling management cost and the number of toolings. The selection of toolings during operation is difficult and greatly reduces work efficiency. Furthermore, different customers choose different terminal arrangements, which may result in the tooling being used only once, resulting in low reuse rate and waste of resources.

[0003] For different winding combinations, existing technical solutions use one-to-one corresponding terminal fixtures for operation, such as... Figure 1 This is a terminal fixing fixture for existing tap products, which uses three M6 inserts of the secondary terminal for positioning; such as Figure 2 The existing terminal fixing fixture for non-tap products uses two M6 inserts for positioning of the secondary terminal, which increases the cost and difficulty of fixture management, wastes raw materials, and reduces work efficiency.

[0004] like Figure 1 As shown in Figure 2, the definitions of tapped and non-tapped terminals are as follows: a tapped secondary terminal includes 3 terminals, and 2 protrusions are provided between the terminals, with an insert with internal thread on the protrusion; a non-tapped secondary terminal includes 2 terminals and the middle of the terminals is a boss structure, with an insert with internal thread at the center of the boss. Summary of the Invention

[0005] The purpose of this utility model is to overcome the defects in the prior art and provide a universal terminal fixing fixture for current transformers, so that a single terminal fixing fixture can be used for a single model of current transformer, thus solving the problems of management difficulties, high management costs, low efficiency and waste of resources caused by the non-universal nature of existing fixtures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a universal terminal fixing fixture for current transformers, comprising a main board, a positioning cylinder, and terminal positioning components. The main board is an "H"-shaped integrated structure composed of two angled strip mounting plates connected by a connecting plate. The positioning cylinder is fixedly connected to the connecting plate. Multiple terminal positioning components are provided on the mounting plate. Each terminal positioning component includes three through holes and a pair of baffles. The three through holes are arranged in an isosceles triangle. The through hole at the vertex of the triangle cooperates with the pair of baffles to position and fix the non-tapped secondary terminal block. The baffles are positioned by the boss structure of the non-tapped secondary terminal. Bolts pass through the through holes and are threadedly connected to the inserts of the non-tapped secondary terminal. The two through holes at the vertices of the base corners are used for positioning and fixing the tapped secondary terminal block. Bolts pass through the through holes and are threadedly connected to the inserts of the tapped secondary terminal.

[0007] Further optimization involves fixing the vertical plate at both ends of the connecting plate perpendicular to the motherboard plane, with the vertical plate facing the terminal positioning assembly. The length of the vertical plate is related to the terminal position required by the design.

[0008] Further optimization involves arranging the position and quantity of the terminal positioning components on the mounting plate according to design requirements.

[0009] Further optimization involves fixing a circular guide sleeve at the through hole of the mounting plate, which is used to assist in fixing the tooling and secondary terminals.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. The ability to fix both tapped and non-tapped terminals in the same position achieves versatility, reduces resource waste and the difficulty of selecting tooling, and improves work efficiency.

[0012] 2. Tooling management is convenient, and tooling management costs are greatly reduced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the terminal fixing fixture structure for the original tap.

[0014] Figure 2 This is a schematic diagram of the original terminal fixing fixture structure without taps.

[0015] Figure 3 This is a schematic diagram of the structure of a terminal fixing fixture for fixing taps, which is a common tool for current transformers.

[0016] Figure 4 This is a schematic diagram of a common terminal fixing fixture for current transformers used to fix non-tap terminals.

[0017] Figure 5 This is a schematic diagram of a common terminal fixing fixture for current transformers.

[0018] Figure 6 This is a top view of a common terminal fixing fixture for current transformers.

[0019] Figure 7 This is a schematic diagram of the terminal positioning assembly.

[0020] The markings in the diagram are: 1-Main board, 2-Positioning cylinder, 3-Terminal positioning assembly, 4-Secondary terminal with tap, 5-Secondary terminal without tap, 6-Bolt, 101-Mounting plate, 102-Connecting plate, 103-Upright plate, 301-Through hole, 302-Baffle, 303-Circular guide sleeve, 401-Protrusion, 501-Boss. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] like Figure 5 and Figure 6 As shown, this utility model provides a universal terminal fixing fixture for current transformers, including a main board 1, a positioning cylinder 2, and terminal positioning components 3. The main board 2 is an "H"-shaped integrated structure composed of two angled strip mounting plates 101 connected by a connecting plate 102. The positioning cylinder 2 is fixedly connected to the connecting plate 102. Multiple terminal positioning components 3 are provided on the mounting plate 101, and the position and number of the terminal positioning components 3 are arranged on the mounting plate 101 according to design requirements. The two ends of the connecting plate are fixedly connected to upright plates perpendicular to the plane of the main board, with the upright plates facing the terminal positioning components. The length of the upright plates is related to the terminal positions required by the design.

[0023] like Figure 7As shown, each terminal positioning assembly includes three through holes 301 and a pair of baffles 302. The three through holes 301 are arranged in an isosceles triangle. The through hole 301 at the vertex and the pair of baffles 302 are used to position and fix the non-tap secondary terminal 5. The baffles 302 are positioned with the boss 501 of the non-tap secondary terminal 5, and the baffles 302 are precisely locked on both sides of the boss 501. The bolts 6 pass through the through holes 301 and are threadedly connected to the insert of the non-tap secondary terminal 5. The two through holes 301 at the vertices of the base corners are used to position and fix the tapped secondary terminal 4. The bolts 6 pass through the through holes 301 and are threadedly connected to the insert of the tapped secondary terminal 4. A circular guide sleeve 303 is fixed on the outer circumference of the through holes 301 on the mounting plate 101. The length of the circular guide sleeve 303 is related to the terminal position required by the design. The circular guide sleeve 303 is used to assist in the tooling and fixation of the secondary terminal.

[0024] In use, first design the structure and dimensions of the main board 1 and the positioning cylinder 2 according to the product model and limiting characteristics. Then, assemble the terminal positioning assembly 3 at the corresponding position on the mounting plate 101 according to the product design requirements. When the product needs to assemble a tapped secondary terminal 4 at this position, such as... Figure 3 As shown, the two through holes 301 at the apex of the bottom corner are positioned and fixed to the secondary terminal 4. Bolts 6 are threaded through the through holes 301 and connected to the inserts on the two protrusions 401 of the tapped secondary terminal 4. When a non-tapped secondary terminal 5 needs to be installed at this position, as shown... Figure 4 As shown, the through hole 301 at the apex of the terminal is connected to the insert on the boss 501 of the non-tapped secondary terminal 5 by bolts 6. The baffle 302 is structurally positioned with the boss 501 of the non-tapped secondary terminal 5, and the baffle 302 is precisely locked on both sides of the boss 501. After all the terminal positioning components 3 are connected to the terminals according to the design requirements, the entire fixture is assembled with the product housing, and positioned with the housing by the positioning cylinder 2, and then cast.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A universal terminal fixing fixture for current transformers, characterized in that: The system includes a main board, positioning cylinders, and terminal positioning assemblies. The main board is an "H"-shaped integrated structure composed of two angled strip mounting plates connected by a connecting plate. The positioning cylinders are fixedly connected to the connecting plates. Multiple terminal positioning assemblies are provided on the mounting plates. Each terminal positioning assembly includes three through holes and a pair of baffles. The three through holes are arranged in an isosceles triangle. The through hole at the vertex of the triangle cooperates with the pair of baffles to position and fix the non-tap secondary terminal block. The baffles are positioned with the boss structure of the non-tap secondary terminal. Bolts pass through the through holes and are threadedly connected to the inserts of the non-tap secondary terminal. The two through holes at the vertices of the base corners are used to position and fix the tapped secondary terminal blocks. Bolts pass through the through holes and are threadedly connected to the inserts of the tapped secondary terminal blocks.

2. The universal terminal fixing fixture for current transformers according to claim 1, characterized in that: The two ends of the connecting plate are fixedly connected to the upright plate perpendicular to the motherboard plane. The upright plate faces the terminal positioning component and the length of the upright plate is related to the terminal position required by the design.

3. The universal terminal fixing fixture for current transformers according to claim 1, characterized in that: The position and number of the terminal positioning components are arranged on the mounting plate according to design requirements.

4. The universal terminal fixing fixture for current transformers according to claim 1, characterized in that: The mounting plate has a circular guide sleeve fixed at the through hole. The circular guide sleeve is used to assist in fixing the tooling and secondary terminals.

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