Transformer tensioning mechanism

Abstract

The utility model discloses a transformer tensioning mechanism, which relates to the field of transformers, and comprises a screw rod, the screw rod is arranged in a fixed plate, and the screw rod can move up and down relative to the fixed plate; the outer side of the screw rod is in threaded connection with the adjusting screw cap, the top of the adjusting screw cap is provided with a cylinder sleeve upwards extending into the fixing plate, and the cylinder sleeve is rotationally connected with the fixing plate. According to the utility model, through the three extrusion pieces, each extrusion piece has unique design and function, the pressing requirements of different winding pressing plates can be met; according to the first extrusion part, a U-shaped base and a worm structure are self-locked through meshing of a worm and a worm gear, it is ensured that a semi-cylinder can keep a stable inclination after adjustment, and stable pressure is continuously applied to a winding pressing plate, and according to the second extrusion part, an adjusting column and a movable column in a base and adjusting column structure can rotate in a self-adaptive mode, and therefore the winding pressing plate can be stably adjusted. And the uniformity of the pressing force in the pressing process is ensured, so that the stability of the transformer winding pressing plate is improved.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a transformer tensioning mechanism. Background Art

[0002] Traditional transformer winding compression mostly adopts a spring pressure pin device structure. This structure uses a spring to continuously apply pressure to the winding pressure plate and adjust the tension of the winding to ensure that the winding and the pressure plate do not loosen during the operation of the transformer, thereby improving the transformer's short-circuit resistance. However, the spring pressure pin device is difficult to control the compression force of the winding and is difficult to adapt to the compression requirements of different winding pressure plates. At the same time, due to the elasticity of the spring itself, it may become loose or deformed during long-term operation, resulting in a decrease in the winding compression force, thereby affecting the performance and stability of the transformer. Utility Model Content

[0003] The purpose of the utility model is to provide a transformer tensioning mechanism, which solves the following technical problems: how to ensure the tightness of the winding and the pressure plate, and how to adapt to different compression requirements.

[0004] In order to solve the problems existing in the prior art, the technical solutions adopted by the present invention are as follows:

[0005] A transformer tensioning mechanism includes a screw rod, which is arranged in a fixed plate and can move up and down relative to the fixed plate;

[0006] An adjusting nut is threadedly connected to the outside of the screw rod, and a sleeve is provided on the top of the adjusting nut, which extends upward to the inside of the fixed plate. The sleeve is rotatably connected to the fixed plate, and the sleeve is sleeved on the outside of the screw rod;

[0007] An extrusion piece is provided at the bottom end of the screw, and is used to apply pressure to the transformer winding pressure plate when the screw descends.

[0008] Preferably, the extrusion part includes: a U-shaped seat, a semi-cylinder, a worm and a semi-circular worm gear, the bottom end of the screw is rotatably connected to the U-shaped seat, the bottom of the U-shaped seat is rotatably connected to the semi-cylinder, the inside of the U-shaped seat is rotatably connected to the worm, the outside of the top of the semi-cylinder is fixedly connected to the semi-circular worm gear, and the semi-circular worm gear is meshed with the worm, wherein sliding grooves are provided on both sides of the bottom of the U-shaped seat, and sliding bars are symmetrically provided on the top of the semi-cylinder, and the sliding bars are slidably connected to the corresponding sliding grooves.

[0009] Preferably, scale marks are provided on both sides of the U-shaped seat, and pointers are provided on both sides of the semi-cylinder.

[0010] Preferably, chamfers are provided on both sides of the bottom of the U-shaped seat.

[0011] Preferably, another structure of the extruded part includes: a base, an adjusting column, a movable column and a convex ball, the bottom of the screw is rotatably connected to the base, the bottom of the base is symmetrically rotatably connected to the adjusting column, the bottom of the adjusting column is symmetrically rotatably connected to the movable column, and convex balls are equidistantly provided at the bottom of the movable column, wherein the cross-sections of the adjusting column and the movable column are both semicircular.

[0012] Preferably, both ends of the adjusting column are provided with hexagonal grooves.

[0013] Preferably, another structure of the extrusion piece includes an extrusion block and a compression nut, the bottom end of the screw is rotatably connected to the extrusion block via a ball joint, and the outer side of the bottom end of the screw is threadedly connected to the compression nut.

[0014] Compared with the related art, the present invention has the following beneficial effects:

[0015] The utility model uses three types of extrusion parts, each of which has its own unique design and function, which can meet the clamping requirements of different winding pressure plates. The first type of extrusion part U-shaped seat and the worm structure are self-locking through the engagement of the worm and the worm wheel, ensuring that the semi-cylinder can maintain a stable inclination after adjustment, and continuously apply stable pressure to the winding pressure plate. The second type of extrusion part base and the adjustment column and the movable column in the adjustment column structure can adaptively rotate to ensure the uniformity of the pressure during the clamping process, thereby improving the stability of the transformer winding pressure plate. Although the third type of extrusion part has a simple structure of an extrusion block and a clamping nut, the ball hinge connection enables the extrusion block to be flexibly tilted to adapt to the shape of the winding pressure plate, and is locked by the clamping nut to ensure stable pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the semi-cylindrical structure shown;

[0018] Figure 3 for Figure 1 The schematic diagram of the U-shaped seat structure shown;

[0019] Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the overall structure of Example 3 of the present utility model.

[0021] Figure markings: 1. screw; 2. adjusting nut; 21. sleeve; 3. extrusion piece; 31. U-shaped seat; 311. slide; 312. scale mark; 32. semi-cylinder; 321. slide bar; 322. pointer; 33. worm; 34. semi-circular worm gear; 41. base; 42. adjusting column; 421. hexagonal groove; 43. movable column; 44. convex ball; 51. extrusion block; 52. tightening nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0023] The transformer tensioning mechanism includes a screw 1 and an adjusting nut 2;

[0024] like Figures 1 to 5 As shown, the screw rod 1 is arranged in the fixed plate, and the screw rod 1 can move up and down relative to the fixed plate. The outer side of the screw rod 1 is threadedly connected to the adjusting nut 2. The top of the adjusting nut 2 is provided with a sleeve 21 extending upward to the inside of the fixed plate. The sleeve 21 is rotatably connected to the fixed plate and is sleeved on the outer side of the screw rod 1. By rotating the adjusting nut 2, the screw rod 1 can be moved up and down.

[0025] The transformer tensioning mechanism also includes three types of extrusion members 3. Different shapes of extrusion members 3 can be selected according to different compression requirements of the winding pressure plate. These three types of extrusion members 3 are all arranged at the bottom end of the screw 1. The extrusion members 3 are used to apply pressure to the transformer winding pressure plate when the screw 1 descends.

[0026] Example 1: This example uses the first extrusion member 3, such as Figures 1 to 3 As shown, the extrusion member 3 includes: a U-shaped seat 31, a semi-cylinder 32, a worm 33 and a semi-circular worm gear 34. The bottom end of the screw 1 is rotatably connected to the U-shaped seat 31, the bottom of the U-shaped seat 31 is rotatably connected to the semi-cylinder 32, the inside of the U-shaped seat 31 is rotatably connected to the worm 33, and the top outside of the semi-cylinder 32 is fixedly connected to the semi-circular worm gear 34. The semi-circular worm gear 34 is meshed with the worm 33. Slide grooves 311 are provided on both sides of the bottom of the U-shaped seat 31, and slide bars 321 are symmetrically provided on the top of the semi-cylinder 32. The slide bars 321 are slidably connected to the corresponding slide grooves 311.

[0027] Scale marks 312 are provided on both sides of the U-shaped seat 31 , and pointers 322 are provided on both sides of the semi-cylinder 32 . By following the indication of the pointers 322 , the rotation angle of the semi-cylinder 32 can be adjusted more accurately according to the scale marks 312 .

[0028] Chamfers are provided on both sides of the bottom of the U-shaped seat 31, and the chamfers are in an arc shape to avoid indentations on the surface of the winding pressure plate when the semi-cylinder 32 rotates.

[0029] By rotating the worm 33 to drive the rotation of the semi-circular worm wheel 34, the semi-cylinder 32 is rotated in the U-shaped seat 31, so that the lower plane of the semi-cylinder 32 can be tilted. When it is in contact with the transformer winding pressure plate, the inclination of the lower plane of the semi-cylinder 32 can be adjusted to control the clamping force on the left and right sides. Compared with the second and third embodiments, this solution can adjust the inclination of the lower plane of the semi-cylinder 32 again after the semi-cylinder 32 is clamped, and change the tightness of the two sides with the winding pressure plate. Moreover, the adjusted semi-cylinder 32 can always maintain the corresponding inclination and continue to apply stable pressure to the winding pressure plate, but the structure is more complicated.

[0030] Embodiment 2: This embodiment uses the second extrusion member 3, such as Figure 4 As shown, the extrusion member 3 includes: a base 41, an adjusting column 42, a movable column 43 and a convex ball 44. The bottom of the screw 1 is rotatably connected to the base 41, wherein the cross-sections of the adjusting column 42 and the movable column 43 are both semicircular.

[0031] Both ends of the adjustment column 42 are provided with hexagonal slots 421 , and the adjustment column 42 can be rotated to a certain angle in advance through the hexagonal slots 421 .

[0032] In this embodiment, when the extrusion member 3 descends, the convex ball 44 of the adjusting column 42 presses the surface of the winding pressure plate, and, during the pressing process, the adjusting column 42 and the movable column 43 can adapt to the different tensions in different areas of the winding pressure plate surface, and rotate accordingly, and the lower surface corresponds to a certain inclination. Compared with embodiments one and three, this method can adapt to the shape change of the winding pressure plate when pressing down, and ensure the uniformity of the applied pressure. However, the contact area between the convex ball 44 and the winding pressure plate is small, which can easily cause the winding pressure plate to deform when the pressure is too high.

[0033] Embodiment 3: This embodiment adopts the third type of extrusion member 3, such as Figure 5 As shown, the extrusion member 3 includes: an extrusion block 51 and a compression nut 52. The bottom end of the screw rod 1 is rotatably connected to the extrusion block 51 through a ball joint, and the outer side of the bottom end of the screw rod 1 is threadedly connected to the compression nut 52.

[0034] In this embodiment, when the extrusion piece 3 is pressed down, the extrusion block 51 can directly contact the winding pressure plate to press the winding pressure plate, and due to the ball joint between the extrusion block 51 and the screw 1, the lower plane of the extrusion block 51 can also be tilted to a certain extent according to the shape of the winding pressure plate, and the extrusion block 51 can also be locked by rotating the tightening nut 52 to fit and press the extrusion block 51. Compared with embodiments one and two, this extrusion piece 3 has a simple structure and is easy to operate, but the extrusion block 51 can only lock one inclination.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer tensioning mechanism, characterized in that: include: A screw rod (1), the screw rod (1) is arranged in the fixed plate, and the screw rod (1) can move up and down relative to the fixed plate; An adjusting nut (2) is connected to the outer side of the screw rod (1) by a threaded connection, a sleeve (21) extending upward to the interior of the fixed plate is provided on the top of the adjusting nut (2), the sleeve (21) is rotatably connected to the fixed plate, and the sleeve (21) is sleeved on the outer side of the screw rod (1); An extrusion piece (3) is provided at the bottom end of the screw rod (1), and the extrusion piece (3) is used to apply pressure to the transformer winding pressure plate when the screw rod (1) descends.

2. The transformer tensioning mechanism according to claim 1, characterized in that: The extruded part (3) comprises: A U-shaped seat (31), the bottom end of the screw (1) is rotatably connected to the U-shaped seat (31); A semi-cylinder (32) is rotatably connected to the bottom of the U-shaped seat (31); A worm (33) is connected to the interior of the U-shaped seat (31) for rotation; A semicircular worm wheel (34), the outer side of the top of the semi-cylinder (32) is fixedly connected with the semicircular worm wheel (34), and the semicircular worm wheel (34) is meshed with the worm (33); Wherein, both sides of the bottom of the U-shaped seat (31) are provided with sliding grooves (311), and the top of the semi-cylinder (32) is symmetrically provided with sliding bars (321), and the sliding bars (321) are slidably connected to the inside of the corresponding sliding grooves (311).

3. The transformer tensioning mechanism according to claim 2, characterized in that: Scale marks (312) are provided on both sides of the U-shaped seat (31), and pointers (322) are provided on both sides of the semi-cylinder (32).

4. The transformer tensioning mechanism according to claim 2, characterized in that: Chamfers are provided on both sides of the bottom of the U-shaped seat (31).

5. The transformer tensioning mechanism according to claim 1, characterized in that: Another structure of the extruded part (3) includes: A base (41), the bottom of the screw (1) is rotatably connected to the base (41); An adjusting column (42) is symmetrically rotated and connected to the bottom of the base (41); The movable column (43) is symmetrically rotated and connected to the bottom of the adjustment column (42); Convex balls (44), convex balls (44) are evenly spaced at the bottom of the movable column (43); The cross sections of the regulating column (42) and the movable column (43) are both semicircular.

6. The transformer tensioning mechanism according to claim 5, characterized in that: Both ends of the adjustment column (42) are provided with hexagonal slots (421).

7. The transformer tensioning mechanism according to claim 1, characterized in that: Another structure of the extruded part (3) includes: An extrusion block (51), the bottom end of the screw (1) is rotatably connected to the extrusion block (51) via a ball joint; A compression nut (52) is provided, wherein the outer side of the bottom end of the screw rod (1) is threadedly connected to the compression nut (52).

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