Integrated hard connection three-phase combined mutual inductor

Abstract

The utility model belongs to the field of mutual inductors, and particularly relates to an integrated hard connection three-phase combined mutual inductor which comprises a shell, mutual inductor bodies arranged on the shell, primary line pins of the mutual inductor bodies and fixing assemblies of the primary line pins. The horizontal part extends outwards from the interior of the shell, an opening is formed in the upper end of the shell and is provided with an end cover in a matched mode, a positioning clamping groove used for forming vertical limiting of the horizontal part is formed between the shell and the end cover, and the fixing assembly is located in a cavity of the shell and connected with the vertical part in a clamped mode to form horizontal limiting of the vertical part. The integration level and the tidiness of the mutual inductor are effectively improved, the connection strength of the primary line pins and the shell is improved, the situation that the primary line pins fall off is avoided, and rapid installation of the mutual inductor is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of mutual inductors, and in particular relates to an integrated hard-connected three-phase combined mutual inductor. Background Art

[0002] Currently, the small current transformers used in three-phase smart meters on the market are all assembled on the housing. This transformer secures the primary line pins by providing an overhanging fixing portion on the outside of the housing. The lower portion of the primary line pins bends outward to engage with the upper portion of the fixing portion, forming an L-shaped structure. The lower portion of the primary line pins extends in the same direction as the axial direction of the iron core and is assembled with the meter. This transformer can be quickly installed with the meter. However, because both the fixing portion and the primary line pins are overhanging outside the housing, the transformer's appearance is simple and its integration is poor. In addition, the primary line pins only have horizontal limit stops on the fixing portion, without vertical limit stops. During storage and transportation, the fixing portion and the primary line pins are prone to hooking, falling, or damage. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides an integrated hard-connected three-phase combination transformer, which effectively improves the integration and neatness of the transformer, improves the connection strength between the primary line pin and the shell, avoids the primary line pin from falling, and helps to achieve rapid installation of the transformer.

[0004] The specific technical solution adopted in this utility model is:

[0005] An integrated hard-connected three-phase combination transformer includes a shell, a transformer body respectively arranged on the shell, a primary line pin of the transformer body and a fixing assembly of the primary line pin. The key is that the primary line pin includes a horizontal part and a vertical part connected to each other, the horizontal part extends outward from the inside of the shell, the upper end of the shell is open and is equipped with an end cover, a positioning slot for forming a vertical limit of the horizontal part is provided between the shell and the end cover, and the fixing assembly is located in the cavity of the shell and is engaged with the vertical part to form a horizontal limit of the vertical part.

[0006] The fixing assembly includes a pair of symmetrically arranged L-shaped plates and vertical ribs located between the L-shaped plates. The vertical ribs match the right-angle portions of the L-shaped plates to form horizontal position limits for the vertical portions.

[0007] Both sides of the horizontal portion are provided with protrusions located in the shell, and the fixing assembly is provided with limiting grooves matching the protrusions.

[0008] The outer side of the end cover is flush with the shell, and the shell is provided with a buckle matched with the end cover.

[0009] The outer side of the shell is provided with a group of spaced convex surfaces, the upper ends of the convex surfaces are lower than the upper end of the shell and form a step-like structure with the upper end of the shell, the end cover is sleeved on the upper end of the shell and fits with the upper end of the convex surface, the outer side of the end cover is flush with the convex surface, and the buckle is located between two adjacent convex surfaces.

[0010] The top of the end cover is also provided with a pressing block matched with the upper end of the horizontal part.

[0011] The lower end of the vertical portion is arched toward the inside of the shell by the fixing assembly.

[0012] The end cover is provided with a pair of asymmetrically arranged fool-proof plug-in posts.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a fixing assembly in the cavity of the shell to be clamped with the vertical portion of the primary line pin, and the horizontal portion of the primary line pin extends outward from the inside of the shell, thereby reducing the number of exposed parts outside the transformer shell, improving the integration and neatness of the transformer, and reducing the damage or falling of parts caused by hooking with other objects during storage and transportation of the transformer.

[0015] A positioning slot matching the horizontal part is provided between the upper end of the shell and the lower end of the end cover. The positioning slot forms a vertical limit for the horizontal part. The fixing assembly limits the vertical part horizontally, effectively preventing the primary wire pin from falling off the shell and ensuring the integrity of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is the main view of the utility model;

[0018] Figure 3 for Figure 2 Cross-sectional view along the AA axis;

[0019] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0020] Figure 5 Schematic diagram of the structure of the end cover;

[0021] Figure 6 is a structural schematic diagram of the shell;

[0022] Figure 7 It is a structural diagram of the primary line pin;

[0023] In the attached drawings, 1. shell, 2. transformer body, 3. primary line pin, 4. end cover, 5. horizontal part, 6. vertical part, 7. positioning slot, 8. L-shaped plate, 9. vertical rib, 10. protrusion, 11. limit slot, 12. buckle, 13. convex surface, 14. pressure block, 15. foolproof plug-in column. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] Specific implementation examples Figure 1-7 As shown, an integrated hard-connected three-phase combination transformer includes a shell 1, a transformer body 2 respectively arranged on the shell 1, a primary line pin 3 of the transformer body 2 and a fixing component of the primary line pin 3. The key is that the primary line pin 3 includes a horizontal part 5 and a vertical part 6 that are connected to each other. The horizontal part 5 extends outward from the inside of the shell 1, and one end of the horizontal part 5 extending outside the shell 1 is connected to the electric meter. The upper end of the vertical part 6 is connected to the horizontal part 5, and the lower end of the vertical part 6 is connected to the primary line of the transformer body 2. The upper end of the shell 1 is open and is equipped with an end cover 4. A positioning slot 7 for forming a vertical limit of the horizontal part 5 is provided between the shell 1 and the end cover 4. The fixing component is located in the cavity of the shell 1 and is engaged with the vertical part 6 to form a horizontal limit of the vertical part 6.

[0026] The fixing assembly of the primary line pin 3 is arranged in the cavity of the shell 1, which reduces the arrangement of the extending parts outside the shell 1, improves the integrity and simplicity of the mutual inductor, and prevents the primary line pin 3 from falling off due to collision damage of the fixing assembly; the horizontal part 5 is vertically limited by means of the positioning slot 7, and the vertical part 6 is horizontally limited by means of the fixing assembly, so that the primary line pin 3 is fixed to the shell 1, preventing the primary line pin 3 from falling off from the shell 1, and further enhancing the connection strength between the primary line pin 3 and the shell 1.

[0027] When installing the primary wire pin 3, insert the vertical portion 6 into the fixing assembly from top to bottom, and then snap the end cover 4 onto the housing 1 to complete the installation and fixation of the primary wire pin 3 on the housing 1, which is easy to operate.

[0028] The fixing assembly includes a pair of symmetrically arranged L-shaped plates 8 and vertical ribs 9 located between the L-shaped plates 8. The vertical ribs 9 and the right-angled parts of the L-shaped plates 8 are matched to form horizontal limiters of the vertical part 6. With the help of the setting of the vertical ribs 9, the vertical part 6 is contacted and matched with the end faces of the vertical ribs 9 and the right-angled parts of the L-shaped plates 8 for limitation, which increases the distance between the right-angled parts of the L-shaped plates 8 and the side walls of the shell 1, avoids the existence of narrow gaps, and facilitates the design and mold opening of the injection mold. At the same time, the vertical ribs 9 can also serve as reinforcement ribs to improve the overall strength of the shell 1.

[0029] The horizontal portion 5 is further provided with protrusions 10 located inside the shell 1 on both sides, and the fixing component is provided with limiting grooves 11 matching the protrusions 10. The limiting grooves 11 form a limit for the protrusions 10 along the inner and outer directions of the shell 1. With the help of the cooperation between the protrusions 10 and the limiting grooves 11, the contact area and the number of fitting surfaces between the shell 1 and the primary wire pin 3 are increased, the friction between the shell 1 and the primary wire pin 3 is increased, and the primary wire pin 3 is prevented from falling off the L-shaped plate 8, thereby further improving the connection strength between the shell 1 and the primary wire pin 3.

[0030] Furthermore, the outer side of the end cap 4 is flush with the housing 1. The housing 1 is provided with a buckle 12 that matches the end cap 4. The end cap 4 is also provided with a fixing groove. The end cap 4 snaps into the fixing groove on the rear end of the housing 1 and cooperates with the buckle 12 to securely connect the end cap 4 to the housing 1. The outer side of the housing 1 is provided with a set of spaced convex surfaces 13. The upper ends of the convex surfaces 13 are lower than the upper end of the housing 1 and form a stepped structure with the upper end of the housing 1. The end cap 4 is sleeved on the upper end of the housing 1 and is aligned with the upper ends of the convex surfaces 13. The outer side of the end cap 4 is flush with the convex surfaces 13. The buckle 12 is located between two adjacent convex surfaces 13. The lower end of the end cap 4 partially extends downward between the convex surfaces 13 to engage the fixing groove and the buckle 12. This improves the integrity between the end cap 4 and the housing 1, and the appearance is simple and smooth.

[0031] Furthermore, a pressure block 14 is provided on the top of the end cover 4 to match the upper end of the horizontal part 5. The lower end of the pressure block 14 is fitted with the upper end of the horizontal part 5, thereby increasing the contact area between the end cover 4 and the horizontal part 5 and improving the connection strength of the primary wire pin 3 between the end cover 4 and the shell 1.

[0032] Furthermore, the lower end of the vertical portion 6 is arched toward the interior of the housing 1 by the fixing assembly, so as to facilitate connection with the primary line of the transformer body 2 and improve the assembly efficiency of the transformer.

[0033] Furthermore, a pair of asymmetrically arranged fool-proof plug-in posts 15 are provided on the end cover 4. The upper end of the mutual inductor needs to be connected with other components later. With the help of the fool-proof plug-in posts 15, accurate installation with other components can be achieved to prevent damage to components caused by incorrect installation direction.

Claims

1. An integrated hard-connected three-phase combination transformer, comprising a housing (1), a transformer body (2) respectively arranged on the housing (1), a primary line pin (3) of the transformer body (2) and a fixing assembly for the primary line pin (3), characterized in that: The primary line pin (3) comprises a horizontal portion (5) and a vertical portion (6) connected to each other, the horizontal portion (5) extending outward from the inside of the shell (1), the upper end of the shell (1) is open and is matched with an end cover (4), a positioning slot (7) for forming a vertical limit of the horizontal portion (5) is provided between the shell (1) and the end cover (4), and the fixing assembly is located in the cavity of the shell (1) and is engaged with the vertical portion (6) to form a horizontal limit of the vertical portion (6).

2. The integrated hard-connected three-phase combination transformer according to claim 1, characterized in that: The fixing assembly comprises a pair of symmetrically arranged L-shaped plates (8) and vertical ribs (9) located between the L-shaped plates (8); the vertical ribs (9) match the right-angled portions of the L-shaped plates (8) to form horizontal position limits for the vertical portion (6).

3. The integrated hard-connected three-phase combination transformer according to claim 1, characterized in that: Both sides of the horizontal portion (5) are provided with protrusions (10) located in the housing (1), and the fixing assembly is provided with limiting grooves (11) matching the protrusions (10).

4. The integrated hard-connected three-phase combination mutual inductor according to claim 1, characterized in that: The outer side of the end cover (4) is arranged flush with the shell (1), and a buckle (12) matching the end cover (4) is provided on the shell (1).

5. The integrated hard-connected three-phase combination transformer according to claim 4, characterized in that: The outer side of the shell (1) is provided with a group of spaced convex surfaces (13), the upper ends of the convex surfaces (13) are lower than the upper end of the shell (1) and form a step-like structure with the upper end of the shell (1), the end cover (4) is sleeved on the upper end of the shell (1) and is fitted with the upper end of the convex surface (13), the outer side of the end cover (4) is flush with the convex surface (13), and the buckle (12) is located between two adjacent convex surfaces (13).

6. The integrated hard-connected three-phase combination transformer according to claim 4, characterized in that: The top of the end cover (4) is also provided with a pressing block (14) matched with the upper end of the horizontal portion (5).

7. The integrated hard-connected three-phase combination transformer according to claim 1, characterized in that: The lower end of the vertical portion (6) is arched toward the inside of the housing (1) by a fixing assembly.

8. The integrated hard-connected three-phase combination transformer according to claim 1, characterized in that: The end cover (4) is provided with a pair of asymmetrically arranged foolproof plug-in posts (15).

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