Fixture for machining annular transformer iron core

Abstract

A clamp for machining an annular transformer iron core comprises a disc, a connecting rod is installed on the disc, an end disc is installed on the connecting rod, and a connecting shaft is coaxially welded to the end disc. An inner pipe is mounted on the disc, a movable hole is formed in the inner pipe, an end mounting disc is mounted on the inner pipe, a movable plate is movably arranged on the movable hole, an inner block is arranged on the movable plate, a top block is mounted on the movable plate, a lead screw is arranged on the end mounting disc, a rotating cap is arranged at the outer side end of the lead screw, a screw sleeve is connected to the lead screw through threads, and a movable disc is arranged at the outer side end of the screw sleeve. When the iron core is fixed, the movable plate can be driven to move, so that the movable plate and the top block on the movable plate are pushed to move outwards through the movable plate, and finally the top block is supported on the inner circumference of the annular iron core, so that the purpose of fixing the iron core is achieved, and the fixed iron core is coaxial with the connecting rod in the axial direction due to the fact that the movable plate moves synchronously and equidistantly in the fixing process. Therefore, the chamfering precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of toroidal transformer processing technology, and in particular to a fixture for processing toroidal transformer cores. Background Technology

[0002] After the core of a toroidal transformer is formed, its end faces need to be chamfered. Chamfering facilitates coil winding and prevents damage to the coil during winding (if the core has sharp edges, these edges can easily scratch the coil's insulation layer during the winding tightening process). However, when chamfering the core, the clamping jaws on the machining tool use an outer circumferential clamping method. This clamping method has poor stability and requires centering adjustment during clamping, making the entire operation cumbersome. Furthermore, due to positioning accuracy issues, chamfer misalignment often occurs. Utility Model Content

[0003] This utility model provides a clamp for processing the core of a toroidal transformer, which solves the shortcomings of the prior art and resolves the problems of cumbersome operation and inconvenient positioning during clamping, and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted:

[0005] A jig for machining the core of a toroidal transformer includes a disc with multiple connecting rods bolted to it. An end plate is bolted to the other end of each connecting rod, and a connecting shaft is coaxially welded to the end plate. The connecting rods are inserted into or mounted on a machine tool spindle. An inner tube is screwed onto the disc, and multiple movable holes are formed on its circumference. An end mounting plate is screwed to the outer end of the inner tube, and a movable plate is movably mounted on the movable holes. An inner block is located on the inner end of the movable plate, and a top block is bolted to the outer end of the movable plate. The inner end of the inner block has a tapered arc surface. A lead screw is rotatably mounted on the end mounting plate, and a rotating cap is located on the outer end of the lead screw, outside the end mounting plate. A limiting ring is connected to the lead screw via a pin, inside the end mounting plate. A threaded sleeve is threaded onto the lead screw, and a movable plate is located on the outer end of the threaded sleeve. The outer circumference of the movable plate is formed with a tapered arc surface similar to that on the top block. The screw sleeve has a matching conical surface and multiple limiting grooves on its outer circumference. A guide ring is fitted on the screw sleeve and is installed on the disc by screws. The guide ring has multiple locking protrusions on its inner circumference, which pass through the limiting grooves and limit the grooves. When the screw rotates, it drives the movable disc to move, which in turn pushes the movable plate and its top block to move outward. Finally, the top block supports the inner circumference of the annular iron core, thus achieving the purpose of fixing the iron core. During fixing, the movable plate moves synchronously and at equal distances, so that the fixed iron core is axially coaxial with the connecting rod, thus ensuring the accuracy of the chamfer.

[0006] Furthermore, in order to increase the contact area between the top block and the inner circumference of the iron core, the outer circumference of the top block is designed with an arc shape.

[0007] Furthermore, to improve the fixing and limiting effect on the iron core during chamfering, multiple pairs of guide holes are opened on the disc. Movable screws are inserted into the guide holes. One end of each pair of movable screws is connected to an outer clamping plate by a thread, and the other end of each pair of movable screws is connected to a movable plate by a thread. The movable plate has a pair of side plates with oblique holes. The other end of the threaded sleeve is fitted with a movable disc by a screw. Multiple connecting arms are welded on the movable disc. The other end of the connecting arm is rotatably equipped with a movable shaft. The two ends of the movable shaft are inserted into the oblique holes, and the connecting arm is located between each pair of side plates. The outer clamping plate can act on the outer periphery of the iron core to improve the clamping effect on the iron core.

[0008] Furthermore, in order to improve the limiting effect of the outer clamping plate on the iron core, the inner wall of the outer clamping plate has an inwardly concave arc-shaped structure.

[0009] Furthermore, in order to improve the structural strength of the connecting arm, reinforcing ribs are welded to the outer wall of the connecting arm, and the inner ends of the reinforcing ribs are welded to the moving plate.

[0010] Furthermore, in order for the top block to move outward and the outer clamping plate to move inward when the lead screw rotates, and for the moving disk to move closer to the disc, the inner end of the inclined hole extends obliquely toward the end plate, and the inner end of the conical arc surface of the inner block expands outward.

[0011] The advantages of the above technical solution are:

[0012] This invention positions the iron core using internal support and external internal pressure. This positioning method improves the fixing effect of the iron core and can automatically perform centering calibration during the fixing process. Attached Figure Description

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0014] Figure 1 A three-dimensional structure of one embodiment is shown. Figure 1 .

[0015] Figure 2 A three-dimensional structure of one embodiment is shown. Figure 2 .

[0016] Figure 3 A magnified view of point A is shown.

[0017] Figure 4 A cross-sectional view of one embodiment is shown. Detailed Implementation

[0018] like Figures 1-4 As shown, a jig for processing the core of a toroidal transformer includes a disc 1, on which multiple connecting rods 6 are bolted. The other end of the connecting rods 6 is bolted to an end plate 60, and a connecting shaft 61 is coaxially welded to the end plate 60.

[0019] An inner tube 3 is mounted on the disc 1 by screws. Multiple movable holes are opened on the periphery of the inner tube 3. An end mounting plate 30 is mounted on the outer end of the inner tube 3 by screws. A movable plate 37 is movably mounted on the movable hole. An inner block is provided on the inner end of the movable plate 37. A top block 38 is mounted on the outer end of the movable plate 37 by bolts. The outer periphery of the top block 38 has an arc-shaped structure, and the inner end of the inner block is formed with a conical arc surface. A lead screw 33 is rotatably mounted on the end mounting plate 30. A rotating cap 31 is provided on the outer end of the lead screw 33. The rotating cap 31 is located on the outer side of the end mounting plate 30. A limiting ring is connected to the lead screw 33 by a pin. The limiting ring is located on the inner side of the end mounting plate 30. A threaded sleeve 34 is connected to the lead screw 33 by a thread. A movable plate 36 is provided on the outer end of the threaded sleeve 34. The outer periphery of the movable plate 36 is formed with a conical surface that matches the conical arc surface on the top block 38. The outer periphery of the threaded sleeve 34 is provided with multiple limiting grooves. A guide ring 40 is fitted on the threaded sleeve 34. The guide ring 40 is installed on the disc 1 by screws. The inner periphery of the guide ring 40 is provided with multiple locking protrusions that pass through the limiting grooves.

[0020] The disc 1 has multiple pairs of guide holes 10, and movable screws 2 are inserted into the guide holes 10. One end of each pair of movable screws 2 is connected to an outer clamping plate 20 by a thread. The inner wall of the outer clamping plate 20 has an inwardly concave arc structure. The other end of each pair of movable screws 2 is connected to a moving plate 21 by a thread. The moving plate 21 has a pair of side plates 22. The side plates 22 have oblique holes 23. The inner end of the oblique holes 23 extends obliquely towards the end disc 60, and the inner end of the conical arc surface of the inner block expands outward. The other end of the threaded sleeve 34 is fitted with a moving disc 25 by a screw. Multiple connecting arms 27 are welded to the moving disc 25. The outer wall of the connecting arm 27 is welded with reinforcing ribs 26. The inner end of the reinforcing ribs 26 is welded to the moving disc 25. The other end of the connecting arm 27 is rotatably provided with a moving shaft 24. The two ends of the moving shaft 24 are inserted into the oblique holes 23, and the connecting arm 27 is located between each pair of side plates 22.

[0021] In this embodiment, the connecting shaft 61 is first connected to the machine tool. During connection, it can be clamped and fixed by the clamping jaws on the machine tool, or it can be fixed by the insertion sleeve and pin.

[0022] When fixing and clamping the iron core, the iron core is sleeved on the top block 38 and inside the outer clamping plate 20 so that the end of the iron core to be processed faces outward.

[0023] The operator then connects a screwdriver and other tools to the rotating cap 31, and then screws the lead screw 33. When the lead screw 33 rotates, it drives the threaded sleeve 34 to move outward along its axis. During this movement, it drives the movable disc 36, the moving disc 25, and the moving shaft 24 to move outward. When the movable disc 36 moves, its outer circumference acts on the inner block, causing the top block 38 to move outward and its outer circumference to fit tightly against the inner circumference of the iron core. At the same time, because the moving shaft 24 acts on the inclined hole 23 during its movement, the inner circumference of the outer clamping plate 20 is tightly clamped against the outer circumference of the iron core, ultimately achieving the purpose of fixing the iron core.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixture for machining the core of a toroidal transformer, characterized in that, Includes a disc (1), on which multiple connecting rods (6) are bolted, and at the other end of the connecting rods (6) is an end plate (60) bolted, and a connecting shaft (61) is coaxially welded on the end plate (60). An inner tube (3) is installed on the disc (1) by screws. Multiple movable holes are opened on the periphery of the inner tube (3). An end mounting plate (30) is installed on the outer end of the inner tube (3) by screws. A movable plate (37) is movably installed on the movable hole. An inner block is provided on the inner end of the movable plate (37). A top block (38) is installed on the outer end of the movable plate (37) by bolts. A conical arc surface is formed on the inner end of the inner block. A lead screw (33) is rotatably mounted on the end mounting plate (30). A rotating cap (31) is provided on the outer end of the lead screw (33). The rotating cap (31) is located on the outer side of the end mounting plate (30). The lead screw (33) is connected to a limiting ring by a pin. The limiting ring is located on the inner side of the end mounting plate (30). A threaded sleeve (34) is connected to the lead screw (33) by a thread. A movable plate (36) is provided on the outer end of the threaded sleeve (34). The outer periphery of the movable plate (36) is formed with a conical surface that matches the conical arc surface on the top block (38). The outer periphery of the threaded sleeve (34) is provided with multiple limiting grooves. A guide ring (40) is fitted on the threaded sleeve (34). The guide ring (40) is installed on the disc (1) by screws. The inner periphery of the guide ring (40) is provided with multiple locking protrusions. The locking protrusions pass through the limiting grooves.

2. The jig for machining the core of a toroidal transformer according to claim 1, characterized in that, The outer periphery of the top block (38) has an arc-shaped structure.

3. The jig for machining the core of a toroidal transformer according to claim 1, characterized in that, The disc (1) has multiple pairs of guide holes (10), and movable screws (2) are inserted in the guide holes (10). One end of each pair of movable screws (2) is connected to an outer clamping plate (20) by a thread, and the other end of each pair of movable screws (2) is connected to a moving plate (21) by a thread. A pair of side plates (22) are provided on the moving plate (21), and oblique holes (23) are provided on the side plates (22). The other end of the threaded sleeve (34) is fitted with a movable disc (25) by screws. Multiple connecting arms (27) are welded on the movable disc (25). The other end of the connecting arm (27) is rotatably provided with a movable shaft (24). The two ends of the movable shaft (24) are inserted into the inclined hole (23), and the connecting arm (27) is located between each pair of side plates (22).

4. The jig for machining the core of a toroidal transformer according to claim 3, characterized in that, The inner wall of the outer clamp (20) has a concave arc-shaped structure.

5. The jig for machining the core of a toroidal transformer according to claim 3, characterized in that, A reinforcing rib (26) is welded to the outer wall of the connecting arm (27), and the inner end of the reinforcing rib (26) is welded to the movable disk (25).

6. The jig for machining the core of a toroidal transformer according to claim 3, characterized in that, The inner end of the oblique hole (23) extends obliquely toward the end plate (60); The inner end of the conical arc surface of the inner block expands outward.

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