A kind of transformer coil dressing device

Abstract

The invention relates to the technical field of transformer production, and specifically to a transformer coil trimming device, comprising: a base, on which two groups of clamping structures are symmetrically arranged; a support member, arranged on the base, and used for supporting a coil winding member; a bidirectional driving assembly, arranged on the base, the bidirectional driving assembly comprising a driving structure and a lifting structure, when the driving structure acts to drive the two groups of clamping structures to clamp the coil winding member, the lifting structure can drive the support member to separate from the coil winding member; a trimming assembly, arranged on the base, and used for driving the coil end to move along the length direction of the coil winding member; two groups of No. 1 conical disks, the two groups of No. 1 conical disks are connected by a transmission chain, one group is connected to the trimming assembly, and the other group is rotatably installed on the base; a clamping assembly, adapted to the two groups of No. 1 conical disks, the clamping assembly can change the movement speed of the trimming assembly, and improve the regularity and product quality of the coil.

Description

Technical Field

[0001] The invention relates to the technical field of mutual inductor production, in particular to a mutual inductor coil trimming device. Background Art

[0002] The current transformer coil generally includes a transformer core and an electromagnetic wire wound around the outside of the transformer core. The coil is designed to meet the electrical performance requirements of the transformer, and the winding quality of the coil is also related to the quality of the transformer. Specifically, if the coil winding on the transformer is misaligned or overlapped, the electrical performance of the transformer will be reduced, and in severe cases, it will burn out.

[0003] For the existing transformer coil winding, most of them use professional winding devices, which include auxiliary devices such as power devices and traction devices. The power device can drive the coil winding member to rotate, and the traction device can drive the conductor to move horizontally, thereby making the conductor spirally wound on the coil winding member.

[0004] However, since different types of transformers have different wire diameter requirements, if the original rotation and lateral displacement ratio is still maintained, the coils wound on the transformer will be misplaced and overlapped, affecting the quality of the transformer. If the rotation and lateral displacement ratio is adjusted, considering that the power unit and traction unit are two separate control systems, a lot of time will be wasted during the debugging process. Summary of the invention

[0005] The object of the present invention is to provide a transformer coil trimming device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A transformer coil trimming device, comprising:

[0008] A base, on which two sets of clamping structures are symmetrically arranged, and the clamping structures can clamp the coil winding of the mutual inductor;

[0009] A support member, disposed on the base, and used for supporting the coil winding member;

[0010] A bidirectional driving assembly is arranged on the base, and the bidirectional driving assembly includes a driving structure and a lifting structure. When the driving structure is actuated to drive the two sets of clamping structures to clamp the coil winding member, the lifting structure can drive the support member to separate from the coil winding member;

[0011] A trimming assembly, arranged on the base, and used for driving the coil end to move along the length direction of the coil winding member;

[0012] Two groups of No. 1 conical discs, the two groups of No. 1 conical discs are connected by a transmission chain, one group is connected to the trimming assembly, and the other group is rotatably mounted on the base;

[0013] A clamping assembly is adapted to the two groups of the No. 1 cone disks, and the clamping assembly can change the movement speed of the trimming assembly.

[0014] As a further solution of the present invention: the clamping structure comprises a rotating disk, on which a plurality of telescopic shafts are slidably mounted in a circumferentially equidistant manner, and the telescopic shafts are parallel to the axis of the rotating disk;

[0015] One end of the telescopic shaft is formed with a clamping portion, and the other end is sleeved with a No. 1 spring. One end of the No. 1 spring is connected to the turntable, and the other end is connected to the end of the telescopic shaft.

[0016] As a further solution of the present invention: the driving structure comprises two slide grooves arranged on the base, a sliding member is slidably installed in the slide groove, and the sliding member is rotatably connected to the turntable;

[0017] A double-headed cylinder is also fixedly mounted on the base, and an actuating end of the double-headed cylinder is fixedly connected to the sliding member.

[0018] As a further solution of the present invention: the lifting structure comprises an extension rod fixedly connected to the sliding member, and a first convex shaft is formed at one end of the extension rod away from the sliding member;

[0019] The lifting structure also includes a side plate fixedly connected to the support member and passing through the base, and a driving groove is provided on the side plate, and the first cam shaft can slide in the driving groove.

[0020] As a further solution of the present invention: the driving groove includes two horizontal grooves symmetrically arranged on the side plate, and the ends of the horizontal grooves are connected with inclined grooves. When the No. 1 cam slides in the inclined groove, the side plate can drive the support member to move downward relative to the base.

[0021] As a further solution of the present invention: a motor is fixedly mounted on the base, an output shaft of the motor is connected to a transmission rod rotatably mounted on the base, the cross section of the transmission rod is non-circular, and two sets of transmission sleeves are slidably sleeved on the transmission rod, a connecting rod is rotatably mounted on the transmission sleeve, and one end of the connecting rod away from the transmission sleeve is connected to the rotating shaft of the turntable;

[0022] The transmission sleeve is connected to the rotating shaft of the rotating disk via a belt.

[0023] As a further solution of the present invention: the trimming assembly comprises a vertical plate arranged on the base, two transmission wheels are rotatably mounted on the vertical plate, and a connecting belt is sleeved between the two transmission wheels;

[0024] The trimming assembly further comprises a guide member and a reciprocating plate arranged on the vertical plate, the reciprocating plate is formed with a sliding connection portion capable of sliding in the guide member, and the reciprocating plate is provided with a threading hole;

[0025] The reciprocating plate is connected to the connecting belt via a chimeric structure.

[0026] As a further solution of the present invention: the interlocking structure includes an interlocking groove arranged along the length direction of the reciprocating plate and a second convex shaft arranged on the connecting belt, and the second convex shaft can slide in the interlocking groove.

[0027] As a further solution of the present invention: the clamping assembly includes a No. 2 conical disk that is slidably fitted with the rotating shaft of one of the No. 1 conical disks, and an annular groove is formed on the No. 2 conical disk. A connecting plate is slidably installed in the annular groove, and the connecting plate is connected to the electric telescopic rod arranged on the vertical plate.

[0028] As a further solution of the present invention: the clamping assembly also includes a No. 3 cone disk slidably fitted with the rotating shaft of another No. 1 cone disk, and the No. 3 cone disk is connected to a No. 2 spring sleeved on the rotating shaft of one of the transmission wheels.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] By setting the clamping structure and the two-way driving assembly, when the coil winding piece is clamped, the coil winding piece can be placed on the loading support, so that the coil winding piece can be automatically coaxial with the turntable, and after the two turntables move close to each other and the clamping part clamps the end of the coil winding piece, the support and the coil winding piece are separated under the cooperation of the No. 1 cam and the inclined groove, thereby ensuring that when the coil winding piece rotates to wind the coil, the support will not interfere with the coil and cause coil wear, and based on the above process, the operation difficulty of clamping the coil winding piece is reduced and the clamping speed is improved;

[0031] By setting up the clamping assembly, the ratio of the rotation speed of the coil winding member to the lateral movement speed of the reciprocating plate can be changed when winding wires of different wire diameters, thereby ensuring the spacing of the coils during winding, avoiding the stacking and misalignment of the coils on the coil winding member, and ensuring that no slipping occurs during transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1The present invention is a structural schematic diagram of an embodiment of a transformer coil trimming device.

[0033] Figure 2 This is a schematic structural diagram from another angle in one embodiment of a transformer coil trimming device.

[0034] Figure 3 This is a structural schematic diagram from another angle in an embodiment of a transformer coil trimming device.

[0035] Figure 4 An exploded view of a clamping structure in an embodiment of a transformer coil trimming device.

[0036] Figure 5 An exploded view of a lifting structure in an embodiment of a transformer coil trimming device.

[0037] Figure 6 This is an exploded view of the connection between the transmission rod and the turntable in one embodiment of the transformer coil dressing device.

[0038] Figure 7 This is a schematic structural diagram of two sets of No. 1 conical disks and a clamping assembly in one embodiment of a transformer coil trimming device.

[0039] Figure 8 The figure is a schematic structural diagram of a trimming assembly in one embodiment of a transformer coil trimming device.

[0040] Fig. 9 A partial exploded view of a trimming assembly in an embodiment of a transformer coil trimming device.

[0041] Fig.10 This is a schematic structural diagram of a No. 1 conical disk and a No. 2 conical disk in one embodiment of a transformer coil trimming device.

[0042] In the figure: 1. base; 2. double-headed cylinder; 3. sliding member; 4. turntable; 5. telescopic shaft; 6. clamping part; 7. No. 1 spring; 8. extension rod; 9. No. 1 cam shaft; 10. side plate; 1001. horizontal groove; 1002. inclined groove; 11. support member; 12. motor; 13. transmission rod; 14. transmission sleeve; 15. belt; 16. connecting rod; 17. bevel gear set; 18. No. 1 conical disk; 19. No. 2 conical disk; 1901. annular groove; 20. No. 3 conical disk; 21. No. 2 spring; 22. transmission chain; 23. transmission wheel; 24. vertical plate; 25. connecting belt; 26. No. 2 cam shaft; 27. reciprocating plate; 2701. fitting groove; 2702. sliding connection part; 2703. threading hole; 28. connecting plate; 29. ​​electric telescopic rod. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0045] See also Figure 1-Figure 10 In an embodiment of the present invention, a transformer coil trimming device includes: a base 1, a support 11, a bidirectional drive assembly, a trimming assembly, two sets of No. 1 conical disks 18 and a clamping assembly, so that when winding wires of different wire diameters, the ratio of the rotation speed of the coil winding member to the lateral movement speed of the reciprocating plate 27 can be changed, thereby ensuring the spacing of the coils during winding, avoiding the phenomenon of stacking and misalignment of the coils on the coil winding member, and ensuring that no slipping occurs during transmission.

[0046] The details are as follows: two sets of clamping structures are symmetrically arranged on the base 1, and the clamping structures can clamp the coil winding parts of the mutual inductor;

[0047] The clamping structure comprises a rotating disk 4, on which a plurality of telescopic shafts 5 are slidably mounted in a circumferentially equidistant manner, and the telescopic shafts 5 are parallel to the axis of the rotating disk 4;

[0048] One end of the telescopic shaft 5 is formed with a clamping portion 6, and the other end is sleeved with a No. 1 spring 7, one end of the No. 1 spring 7 is connected to the turntable 4, and the other end is connected to the end of the telescopic shaft 5;

[0049] The support member 11 is disposed on the base 1, and the support member 11 is used to support the coil winding member;

[0050] The bidirectional driving assembly is arranged on the base 1, and the bidirectional driving assembly includes a driving structure and a lifting structure. When the driving structure acts to drive the two sets of clamping structures to clamp the coil winding member, the lifting structure can drive the support member 11 to separate from the coil winding member;

[0051] The driving structure comprises two slide grooves arranged on the base 1, in which a sliding member 3 is slidably installed, and the sliding member 3 is rotatably connected to the turntable 4;

[0052] A double-headed cylinder 2 is also fixedly mounted on the base 1, and the action end of the double-headed cylinder 2 is fixedly connected to the sliding member 3;

[0053] The lifting structure comprises an extension rod 8 fixedly connected to the sliding member 3, and a first convex shaft 9 is formed at one end of the extension rod 8 away from the sliding member 3;

[0054] The lifting structure also includes a side plate 10 fixedly connected to the support member 11 and passing through the base 1, and a driving groove is arranged on the side plate 10, and the No. 1 cam shaft 9 can slide in the driving groove, and the driving groove includes two horizontal grooves 1001 symmetrically arranged on the side plate 10, and the ends of the horizontal grooves 1001 are connected to inclined grooves 1002. When the No. 1 cam shaft 9 slides in the inclined grooves 1002, the side plate 10 can drive the support member 11 to move downward relative to the base 1.

[0055] In the initial state, the coil winding piece is placed on the support 11. At this time, the coil winding piece is just concentric with the rotating axis of the turntable 4. At this time, the double-headed cylinder 2 is controlled to move, which can drive the two sliding pieces 3 to move closer to each other, so that the two groups of turntables 4 can move toward the end of the coil winding piece. During this process, the sliding piece 3 drives the No. 1 cam 9 to move in the horizontal groove 1001 through the extension rod 8, so that the length of the support 11 remains constant (the coil winding piece is still concentric with the rotating axis of the turntable 4), until the clamping part 6 is engaged with the end of the coil winding piece, the No. 1 cam 9 moves to the end of the horizontal groove 1001, and then the two sliding pieces 3 continue to move closer, causing sliding between the turntable 4 and the clamping part 6, so that the No. 1 spring 7 is stretched, and at the same time, the No. 1 cam 9 will move along the inclined groove 1002, so that the side plate 10 can drive the support 11 to move toward the base 1, so that the support 11 can be separated from the coil winding piece.

[0056] Through the above-mentioned arrangement, when the coil winding member is clamped, the coil winding member can be placed on the loading support member 11, so that the coil winding member can be automatically coaxial with the turntable 4, and after the two turntables 4 move close to each other and the clamping part 6 clamps the end of the coil winding member, the support member 11 is separated from the coil winding member under the cooperation of the No. 1 cam 9 and the inclined groove 1002, thereby ensuring that when the coil winding member rotates to wind the coil, the support member 11 will not interfere with the coil and cause coil wear, and based on the above-mentioned process, the operating difficulty of clamping the coil winding member is reduced and the clamping speed is improved.

[0057] See also Figure 1 , Figure 2 , Figure 6 , Figure 8 , Fig. 9 A motor 12 is also fixedly mounted on the base 1, and the output shaft of the motor 12 is connected to a transmission rod 13 rotatably mounted on the base 1, the cross section of the transmission rod 13 is non-circular, and two groups of transmission sleeves 14 are slidably sleeved on the transmission rod 13, a connecting rod 16 is rotatably mounted on the transmission sleeve 14, and one end of the connecting rod 16 away from the transmission sleeve 14 is connected to the rotating shaft of the turntable 4;

[0058] The transmission sleeve 14 is also connected to the rotating shaft of the rotating disk 4 via a belt 15;

[0059] The transmission rod 13 is connected to the trimming assembly through a bevel gear set 17. The trimming assembly is arranged on the base 1. The trimming assembly is used to drive the coil end to move along the length direction of the coil winding member. The trimming assembly includes a vertical plate 24 arranged on the base 1. Two transmission wheels 23 are rotatably mounted on the vertical plate 24. A connecting belt 25 is sleeved between the two transmission wheels 23.

[0060] The trimming assembly further includes a guide member and a reciprocating plate 27 disposed on the vertical plate 24, the reciprocating plate 27 is formed with a sliding connection portion 2702 capable of sliding in the guide member, and the reciprocating plate 27 is provided with a threading hole 2703;

[0061] The reciprocating plate 27 is connected to the connecting belt 25 via a chimeric structure, wherein the chimeric structure includes a chimeric groove 2701 arranged along the length direction of the reciprocating plate 27 and a second convex shaft 26 arranged on the connecting belt 25 , and the second convex shaft 26 can slide in the chimeric groove 2701 .

[0062] When the coil winding piece is clamped, the motor 12 is controlled to work. At this time, the output shaft of the motor 12 can drive the transmission rod 13 connected thereto to rotate, and the transmission sleeve 14 sleeved on the transmission rod 13 to rotate. The transmission sleeve 14 drives the corresponding turntable 4 to rotate through the belt 15, thereby driving the coil winding piece to perform circular motion to wind the coil.

[0063] Furthermore, by setting up the connecting rod 16, on the one hand, the belt 15 can be supported so that the belt 15 is always in a taut state. On the other hand, when the turntable 4 moves, the transmission sleeve 14 can be driven to move on the transmission rod 13, so that the transmission sleeve 14 can remain connected to the rotating shaft of the turntable 4, and the power of the transmission rod 13 can be effectively transmitted to the turntable 4.

[0064] When the transmission rod 13 rotates, the bevel gear set 17 can drive one of the transmission wheels 23 to rotate, and the connecting belt 25 arranged between the two transmission wheels 23 can be moved, wherein the connecting belt 25 can be regarded as consisting of two circular segments and two straight line segments. When the connecting belt 25 moves, the cooperation between the second cam shaft 26 and the engaging groove 2701 can make the reciprocating plate 27 reciprocate along the length direction of the coil winding member, and at the same time, in conjunction with the rotation of the coil winding member, the coil can be spirally wound on the coil winding member to avoid stacking, misalignment, etc. of the coil on the coil winding member.

[0065] Through the above arrangement, the movement of the reciprocating plate 27 and the rotation of the coil winding member are mechanically linked, thereby improving the integration of the device and reducing the production and use costs.

[0066] See also Figure 7 , Fig.10 , the two groups of the first cone disks 18 are connected by a transmission chain 22, one group is connected to the trimming assembly, and the other group is rotatably mounted on the base 1;

[0067] The clamping assembly is adapted to the two sets of the first cone discs 18, and the clamping assembly can change the movement speed of the trimming assembly;

[0068] The clamping assembly includes a second cone disk 19 that is slidably fitted with the rotating shaft of one of the first cone disks 18, and an annular groove 1901 is formed on the second cone disk 19. A connecting plate 28 is slidably installed in the annular groove 1901, and the connecting plate 28 is connected to an electric telescopic rod 29 provided on the vertical plate 24;

[0069] The clamping assembly also includes a No. 3 cone disk 20 that is slidably fitted with the rotating shaft of another No. 1 cone disk 18 , and the No. 3 cone disk 20 is connected to a No. 2 spring 21 that is sleeved on the rotating shaft of one of the transmission wheels 23 .

[0070] When in use, the transmission ratio can be controlled according to the wire diameter of the coil to be wound. Specifically, by controlling the action of the electric telescopic rod 29, the connecting plate 28 can be driven to move. When the connecting plate 28 moves, the distance between the No. 1 conical disk 18 and the No. 2 conical disk 19 can be changed. At this time, the transmission chain 22 will be squeezed or released due to the change in the distance between the No. 1 conical disk 18 and the No. 2 conical disk 19, thereby changing the circumferential radius of one end of the transmission chain 22. Since the total length of the transmission chain 22 is constant, when the circumferential radius of one end thereof changes, the other end will perform a corresponding reverse transformation. In detail, when the diameter of one end of the transmission chain 22 increases, the diameter of the other end thereof will decrease, and vice versa. Due to the presence of the No. 2 spring 21, the No. 3 conical disk 20 cooperates with the No. 1 conical disk 18, so that the transmission chain 22 can always be in a taut state, thereby ensuring that no slipping occurs during transmission.

[0071] It is worth noting that when the wire diameter of the coil to be wound is larger, the larger the radius between the transmission chain 22 and the second conical disk 19, the smaller the other end, thereby increasing the transmission ratio, so that the transmission wheel 23 rotates faster, and then when the coil winding member rotates one circle, the reciprocating plate 27 can drive the wire to move a longer straight-line distance, thereby ensuring the spacing when the coil is wound.

[0072] Through the above arrangement, when winding wires of different wire diameters, the ratio of the rotation speed of the coil winding member to the lateral movement speed of the reciprocating plate 27 can be changed, thereby ensuring the spacing of the coils during winding, avoiding the stacking and misalignment of the coils on the coil winding member, and ensuring that no slipping occurs during transmission.

[0073] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0074] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A transformer coil trimming device, characterized in that: include: A base (1), wherein two sets of clamping structures are symmetrically arranged on the base (1), and the clamping structures are capable of clamping the coil winding of the mutual inductor; A support member (11) is arranged on the base (1), and the support member (11) is used to support the coil winding member; A bidirectional drive assembly is arranged on the base (1), the bidirectional drive assembly comprising a drive structure and a lifting structure, and when the drive structure is actuated to drive the two sets of clamping structures to clamp the coil winding member, the lifting structure can drive the support member (11) to separate from the coil winding member; A trimming assembly, arranged on the base (1), the trimming assembly being used to drive the coil end to move along the length direction of the coil winding member; Two groups of No. 1 conical disks (18), the two groups of No. 1 conical disks (18) being connected via a transmission chain (22), one group being connected to the trimming assembly, and the other group being rotatably mounted on the base (1); A clamping assembly adapted to the two sets of the first conical discs (18), the clamping assembly being capable of changing the movement speed of the trimming assembly; The clamping structure comprises a rotating disk (4), on which a plurality of telescopic shafts (5) are slidably mounted in a circular manner and at equal intervals, and the telescopic shafts (5) are parallel to the axis of the rotating disk (4); A clamping portion (6) is formed at one end of the telescopic shaft (5), and a No. 1 spring (7) is sleeved on the other end; one end of the No. 1 spring (7) is connected to the rotating disk (4), and the other end is connected to the end of the telescopic shaft (5); The driving structure comprises two slide grooves arranged on the base (1), wherein a sliding member (3) is slidably installed in the slide groove, and the sliding member (3) is rotationally connected to the rotating disk (4); A double-headed cylinder (2) is also fixedly mounted on the base (1), and an actuating end of the double-headed cylinder (2) is fixedly connected to the sliding member (3); The lifting structure comprises an extension rod (8) fixedly connected to the sliding member (3), and a first convex shaft (9) is formed at one end of the extension rod (8) away from the sliding member (3); The lifting structure further comprises a side plate (10) fixedly connected to the support member (11) and penetrating the base (1), wherein the side plate (10) is provided with a driving groove, and the first cam shaft (9) is capable of sliding in the driving groove; The driving groove comprises two horizontal grooves (1001) symmetrically arranged on the side plate (10), and the ends of the horizontal grooves (1001) are connected to inclined grooves (1002). When the first convex shaft (9) slides in the inclined grooves (1002), the side plate (10) can drive the support member (11) to move downward relative to the base (1).

2. A transformer coil trimming device according to claim 1, characterized in that: A motor (12) is also fixedly mounted on the base (1), and an output shaft of the motor (12) is connected to a transmission rod (13) rotatably mounted on the base (1); the cross section of the transmission rod (13) is non-circular, and two groups of transmission sleeves (14) are slidably sleeved on the transmission rod (13); a connecting rod (16) is rotatably mounted on the transmission sleeve (14), and one end of the connecting rod (16) away from the transmission sleeve (14) is connected to the rotating shaft of the turntable (4); The transmission sleeve (14) is also connected to the rotating shaft of the rotating disk (4) via a belt (15).

3. A transformer coil trimming device according to claim 1, characterized in that: The trimming assembly comprises a vertical plate (24) arranged on the base (1), two transmission wheels (23) are rotatably mounted on the vertical plate (24), and a connecting belt (25) is sleeved between the two transmission wheels (23); The trimming assembly further comprises a guide member and a reciprocating plate (27) arranged on the vertical plate (24); a sliding connection portion (2702) capable of sliding in the guide member is formed on the reciprocating plate (27); and a threading hole (2703) is provided on the reciprocating plate (27); The reciprocating plate (27) is connected to the connecting belt (25) via a chimeric structure.

4. A transformer coil trimming device according to claim 3, characterized in that: The interlocking structure comprises an interlocking groove (2701) arranged along the length direction of the reciprocating plate (27) and a second convex shaft (26) arranged on the connecting belt (25), and the second convex shaft (26) is capable of sliding in the interlocking groove (2701).

5. A transformer coil trimming device according to claim 3, characterized in that: The clamping assembly comprises a second conical disk (19) slidably fitted with the rotating shaft of one of the first conical disks (18); an annular groove (1901) is formed on the second conical disk (19); a connecting plate (28) is slidably mounted in the annular groove (1901); the connecting plate (28) is connected to an electric telescopic rod (29) arranged on the vertical plate (24).

6. A transformer coil trimming device according to claim 5, characterized in that: The clamping assembly further comprises a No. 3 conical disc (20) which is slidably fitted with the rotating shaft of another No. 1 conical disc (18), and the No. 3 conical disc (20) is connected to a No. 2 spring (21) which is sleeved on the rotating shaft of one of the transmission wheels (23).

Images