A terminal fixing device for a low voltage transformer

Abstract

The utility model discloses a kind of wiring terminal fixing devices of low-voltage transformer, belong to transformer accessory technical field.The device includes base, square insulator, fixed plate and two limit plates, limit plate is fixed with base and square insulator clamped joint;Fixed plate is fixed in base, is provided with recess;Rotatably provided with rotating plate on fixed plate;Fixed plate is also provided with mounting groove and limit groove;Slidingly provided with sliding block in mounting groove, sliding block is fixedly connected with slide bar, spring piece is elastically abutted to sliding block;Rotating plate bottom is fixedly connected with limit block;When rotating cable is compressed tightly by rotating plate, limit block enters limit groove, spring piece pushes sliding block and slide bar, make slide bar and limit block cooperate, limit block is locked in limit groove, realize the locking of rotating plate.The utility model solves the problem that existing technology is complex, locking unstable and inconvenient to operate, with the advantages of simple structure, locking reliable, convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of transformer accessories technology, and in particular to a terminal fixing device for a low-voltage transformer. Background Technology

[0002] Low-voltage transformers are widely used electrical devices in power systems, and their terminals are key components for making electrical connections between the transformer and external lines (such as cables). To ensure the reliability and safety of the electrical connection, fixing devices are needed to securely fix the cables to the terminals.

[0003] In practical applications, ensuring the tightness and stability of the connection between the cable and the terminal block is crucial. If the cable is not securely fixed, it is prone to loosening when subjected to vibrations generated by the transformer during operation or external disturbances, leading to increased contact resistance, overheating at the connection point, and even short circuit or open circuit faults, seriously threatening the safe and stable operation of the power grid.

[0004] Currently, most existing terminal block fixing devices use bolt tightening or pressure plate fixing methods. When fixing cables, these devices usually require operators to use tools (such as wrenches) to tighten multiple bolts one by one. The operation process is cumbersome, time-consuming, and labor-intensive, especially in situations where the installation space is small or frequent maintenance is required, where the inconvenience of operation is particularly prominent.

[0005] More importantly, the stability of the locking effect of this threaded locking structure needs improvement. Under prolonged operation and vibration, the bolts are prone to loosening, leading to a decrease in the clamping force on the cable and making the fixing effect unreliable.

[0006] Therefore, this utility model proposes a terminal fixing device for a low-voltage transformer to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems that existing low-voltage transformer terminal fixing devices have complex structures, inconvenient operation, and insufficient locking stability, this utility model aims to provide a low-voltage transformer terminal fixing device with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a terminal fixing device for a low-voltage transformer, including: a base, a square insulator disposed below the base, a fixing plate fixedly connected to the base, two limiting plates; and a rotating rod, a rotating plate, a slider, a spring, a sliding rod, and a limiting block.

[0009] The base has a first slot, the square insulator has a second slot, the fixing plate has a groove for accommodating cables, one side of the fixing plate has an installation groove, and the other side of the fixing plate has a limit groove.

[0010] Furthermore, the two limiting plates have structures that engage with the first slot and the second slot respectively to fix the base to the square insulator; the two ends of the rotating rod are rotatably connected to the fixing plate; the rotating plate is rotatably sleeved on the rotating rod; the slider is slidably disposed in the mounting groove; the spring piece is disposed in the mounting groove and elastically abuts against the slider; the sliding rod is fixedly connected to the slider; the limiting block is fixedly connected to the bottom of the rotating plate, and the limiting block is used to engage with the limiting groove.

[0011] Preferably, the two limiting plates are fixedly connected by bolts.

[0012] Preferably, the terminal fixing device of the low-voltage transformer also includes a handle, which is fixedly connected to the slider and extends through the outer surface of the rotating plate.

[0013] Preferably, a pressing surface is provided on the rotating plate at the position corresponding to the groove.

[0014] Preferably, one end of the slide rod passes through the inside of the limiting block, and the width of the limiting groove is greater than the width of the limiting block.

[0015] Preferably, the spring is V-shaped, with one end abutting against the wall of the mounting groove and the other end abutting against the slider.

[0016] Preferably, the opening direction of the limiting groove is perpendicular to the axial direction of the slide rod.

[0017] Preferably, the slide bar is arranged parallel to the axis of the rotating rod.

[0018] This utility model has the following beneficial effects: 1. This utility model, through the coordinated operation of a rotating plate, rotating rod, slider, spring, sliding rod, limiting block, mounting groove, and limiting groove, achieves convenient automatic locking when the rotating plate rotates to press the cable, the limiting block rotates into the limiting groove, and the spring automatically pushes the slider and sliding rod to move and lock the limiting block. By pulling the handle, the slider and sliding rod can be driven in the opposite direction to unlock, solving the problems of complex fixing structure, unstable locking, and inconvenient operation of the existing terminal block, and achieving the technical effect of simple structure, reliable locking, and intuitive and convenient operation.

[0019] 2. This utility model solves the problems of cumbersome assembly and poor connection reliability of the base and insulator in traditional devices by opening a first slot and a second slot on the base and a square insulator respectively, setting two limiting plates to engage with the slots, and then fixing the limiting plates with bolts. It achieves the technical effects of fast installation, accurate positioning and overall stable fixing.

[0020] 3. This utility model, by setting a pressing surface at the corresponding groove position on the rotating plate, when the rotating plate is rotated to the locked position, the pressing surface can continuously and stably press the cable located in the groove of the fixing plate, which solves the problem of the cable not being firmly fixed and easily loosening, and achieves the technical effect of good pressing effect and firm fixation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a terminal fixing device for a low-voltage transformer according to the present invention. Figure 2 This is a schematic diagram of the rotating rod of a terminal fixing device for a low-voltage transformer according to the present invention. Figure 3 This is a schematic diagram of the spring clip of a low-voltage transformer terminal fixing device proposed in this utility model; Figure 4 This is a schematic diagram of the first slot of a terminal fixing device for a low-voltage transformer proposed in this utility model.

[0022] Legend: 1. Fixed plate; 2. Rotating rod; 3. Rotating plate; 4. Mounting slot; 5. Spring; 6. Slider; 7. Sliding rod; 8. Limiting slot; 9. Limiting block; 10. Handle; 11. Base; 12. First slot; 13. Square insulator; 14. Second slot; 15. Limiting plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in 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 a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0024] Please refer to Figures 1 to 4 This utility model provides a terminal fixing device for a low-voltage transformer, which aims to solve the problems of complex fixing structure and unstable locking effect of the terminal for cables in the prior art.

[0025] The terminal fixing device of the low-voltage transformer includes a base 11 with a first slot 12; a square insulator 13 disposed below the base 11 with a second slot 14; a fixing plate 1 fixedly connected to the base 11 with a groove for accommodating cables; and two limiting plates 15, each having a structure that engages with the first slot 12 and the second slot 14 to fix the base 11 to the square insulator 13. The two limiting plates 15 are fixedly connected by bolts.

[0026] The device also includes a rotating rod 2, the two ends of which are rotatably connected to a fixed plate 1; a rotating plate 3, which is rotatably sleeved on the rotating rod 2; a mounting groove 4 is provided on one side of the fixed plate 1, and a limiting groove 8 is provided on the other side; a slider 6, which is slidably disposed in the mounting groove 4; a spring piece 5, which is disposed in the mounting groove 4 and elastically abuts against the slider 6; a sliding rod 7, which is fixedly connected to the slider 6; and a limiting block 9, which is fixedly connected to the bottom of the rotating plate 3 and is used to engage with the limiting groove 8.

[0027] In a preferred embodiment, the two limiting plates 15 are fixedly connected by bolts to enhance the stability of the connection between the base 11 and the square insulator 13.

[0028] To achieve cable clamping, a clamping surface is provided on the rotating plate 3 at the position corresponding to the groove. When the rotating plate 3 is rotated to the position, the clamping surface clamps the cable.

[0029] To enable locking and unlocking, the device also includes a handle 10, which is fixedly connected to the slider 6 and extends out of the outer surface of the rotating plate 3 for operating the slider 6 to slide along the mounting groove 4.

[0030] The spring piece 5 is specifically designed to be V-shaped. One end of the spring piece 5 abuts against the groove wall of the mounting groove 4, while the other end elastically abuts against the slider 6, which is used to apply a continuous elastic thrust to the slider 6.

[0031] The slide rod 7 is fixedly connected to the slider 6, and the slide rod 7 is set parallel to the axis of the rotating rod 2. One end of the slide rod 7 passes through the limiting block 9 fixed at the bottom of the rotating plate 3.

[0032] The opening direction of the limiting groove 8 on the fixed plate 1 is perpendicular to the axis of the slide rod 7, and the width of the limiting groove 8 is greater than the width of the limiting block 9. This structure allows the limiting block 9 to enter the limiting groove 8 when the rotating plate 3 rotates. Under the action of the spring piece 5 pushing the slider 6 and thus driving the slide rod 7, the slide rod 7 cooperates with the limiting block 9 to lock the limiting block 9 in the limiting groove 8, thereby achieving the locking of the rotating plate 3 relative to the fixed plate 1.

[0033] As a preferred embodiment, in order to further enhance the installation stability of the entire device, the two limiting plates 15 are fixedly connected by bolts to ensure that the base 11 and the square insulator 13 are tightly connected.

[0034] As another preferred embodiment, in order to reliably press the cable, a pressing surface is provided on the rotating plate 3 at the position corresponding to the groove of the fixing plate 1. When the rotating plate 3 is rotated to the locked position, the pressing surface abuts against and presses the cable.

[0035] As another preferred embodiment, in order to facilitate unlocking and resetting by the operator, the device is also provided with a handle 10, which is fixedly connected to the slider 6 and extends through the outer surface of the rotating plate 3 for easy pulling.

[0036] As another preferred embodiment, in order to provide a reliable and structurally simple elastic restoring force to the slider 6, the spring 5 is preferably V-shaped, with one end of the V-shaped spring 5 abutting against the groove wall of the mounting groove 4 and the other end elastically abutting against the slider 6.

[0037] As another preferred embodiment, in order to ensure smooth locking action and coordinated movement between components, the slide bar 7 is set parallel to the axis of the rotating bar 2.

[0038] As another preferred embodiment, in order to achieve the snap-fit ​​engagement between the limiting block 9 and the limiting groove 8, one end of the slide rod 7 is inserted into the limiting block 9. At the same time, the width of the limiting groove 8 is set to be greater than the width of the limiting block 9, so as to provide the necessary gap for the limiting block 9 to be screwed into the limiting groove 8.

[0039] As another preferred embodiment, in order to define the engagement method of the locking mechanism, the opening direction of the limiting groove 8 is set to be perpendicular to the axis of the slide bar 7, so that after the limiting block 9 rotates into the limiting groove 8 with the rotating plate 3, the slide bar 7 can move along its axis to lock the limiting block 9.

[0040] Working principle: During installation, the square insulator 13 is placed under the base 11, so that the second slot 14 is aligned with the first slot 12. The snap-fit ​​structures of the two limiting plates 15 are snapped into the first slot 12 and the second slot 14 respectively, so as to realize the snap-fit ​​cooperation between the base 11 and the square insulator 13. Finally, the two limiting plates 15 are fixedly connected by bolts to ensure the stability of the entire device installation.

[0041] When it is necessary to secure the cable, the operator first pulls the handle 10. The handle 10 causes the slider 6, which is fixedly connected to it, to slide within the mounting groove 4, compressing the V-shaped spring 5. Simultaneously, the slider 6 causes the slide rod 7, which is fixedly connected to it, to move, releasing the lock of the slide rod 7 on the limit block 9. At this time, the rotating plate 3 is in a rotatable unlocked state. The operator places the cable in the groove on the fixing plate 1. Then, the operator rotates the rotating plate 3, which rotates around the rotating rod 2. The pressing surface on the rotating plate 3 gradually approaches and presses the cable in the groove. As the rotating plate 3 rotates to the pressing position, the limit block 9 fixed to the bottom of the rotating plate 3 rotates into the limit groove 8 on the fixing plate 1. At this time, the operator... When the operator releases handle 10, the elastic restoring force of spring 5 pushes slider 6 to slide in the opposite direction. Slider 6 drives slide rod 7 to move, and slide rod 7 then cooperates with limit block 9 located in limit groove 8, locking limit block 9 inside limit groove 8. Through the cooperation of slide rod 7, limit block 9 and limit groove 8, reliable locking of rotating plate 3 relative to fixed plate 1 is achieved, thereby completing the clamping and fixing of cable. When it is necessary to remove cable, pull handle 10 again and repeat the above unlocking action to rotate rotating plate 3 and release cable. Through this locking mechanism, this utility model solves the problem of complex terminal fixing structure and unstable locking effect in the prior art.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A terminal fixing device for a low-voltage transformer, characterized in that, include: A base (11) is provided with a first slot (12); A square insulator (13) is disposed below the base (11), and a second slot (14) is provided on the square insulator (13). A fixing plate (1) is fixedly connected to the base (11), and the fixing plate (1) has a groove for accommodating cables; Two limiting plates (15) are provided, each having a structure that engages with the first slot (12) and the second slot (14) to fix the base (11) to the square insulator (13). Rotating rod (2), the two ends of which are rotatably connected to the fixed plate (1); Rotating plate (3), the rotating plate (3) is rotatably sleeved on the rotating rod (2), and the fixing plate (1) has an installation groove (4) on one side and a limit groove (8) on the other side. Slider (6), the slider (6) is slidably disposed in the mounting groove (4); Spring (5), the spring (5) is disposed in the mounting groove (4) and elastically abuts against the slider (6); Slide rod (7), which is fixedly connected to the slider (6); Limiting block (9), which is fixedly connected to the bottom of the rotating plate (3), is used to engage with the limiting groove (8).

2. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, The two limiting plates (15) are fixedly connected by bolts.

3. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, It also includes a handle (10), which is fixedly connected to the slider (6) and extends through the outer surface of the rotating plate (3).

4. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, The rotating plate (3) has a pressing surface at the position corresponding to the groove.

5. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, One end of the slide bar (7) passes through the inside of the limiting block (9), and the width of the limiting groove (8) is greater than the width of the limiting block (9).

6. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, The spring (5) is V-shaped, with one end abutting against the groove wall of the mounting groove (4) and the other end abutting against the slider (6).

7. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, The opening direction of the limiting groove (8) is perpendicular to the axial direction of the slide rod (7).

8. The terminal fixing device for a low-voltage transformer according to claim 1, characterized in that, The slide bar (7) is arranged parallel to the axis of the rotating rod (2).

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