A transformer coil winding tool

Abstract

The application provides a transformer coil winding tool, which comprises a connecting assembly and fixing assemblies arranged at two ends of the connecting assembly; the fixing assembly comprises a side plate, a base and a spacer; the base is detachably connected with the connecting assembly, and the side plate is connected with the base through the spacer; a limiting through slot one for extending an end of a main iron core of the transformer coil is arranged on the side plate; the side plates at two ends of the connecting assembly are oppositely arranged to form a winding space of the transformer coil. The base of the connecting assembly and the fixing assembly is detachably connected, so that the connection and disconnection between the components of the transformer coil and the winding tool can be conveniently realized; the fixing assemblies are arranged at two ends of the connecting assembly, and the main iron core of the transformer is limited by the limiting through slot one of the side plate in the fixing assembly, so that the positioning accuracy of the transformer iron core can be ensured, and the winding quality of the transformer coil is ensured.

Description

Technical Field

[0001] This invention relates to the field of transformer manufacturing technology, and more specifically to a transformer coil winding fixture. Background Technology

[0002] The transformer coils used in rail transit are relatively large. During the winding process, the transformer core is the foundation for coil winding. If the positioning of the transformer core changes during the winding process, it will result in poor winding accuracy of the transformer coil. The wound coil will have a large deviation from the design size and will not meet the requirements for use in rail transit.

[0003] In addition, see Figure 2 The transformer coil 7 typically includes multiple iron cores. During the winding process, the secondary winding is first performed using the main iron core 7.1, and then the primary winding is performed using the auxiliary iron core 7.2. If the relative positional accuracy between the main iron core 7.1 and the auxiliary iron core 7.2 cannot be controlled, it will result in a large deviation in the relative position between the main iron core 7.1 and the auxiliary iron core 7.2, which will lead to a large deviation between the final dimensions of the wound transformer coil and the design dimensions.

[0004] In summary, there is an urgent need for a transformer coil winding fixture to solve the problems existing in the current technology. Summary of the Invention

[0005] The purpose of this invention is to provide a transformer coil winding fixture to solve the problem of core positioning during the transformer coil winding process.

[0006] To achieve the above objectives, the present invention provides a transformer coil winding fixture, including a connecting assembly and a fixing assembly disposed at both ends of the connecting assembly; the fixing assembly includes a side plate, a base and a spacer; the base and the connecting assembly are detachably connected, and the side plate is connected to the base through the spacer; the side plate is provided with a limiting through groove for extending the end of the main iron core of the transformer coil, and the side plates at both ends of the connecting assembly are arranged opposite to each other to form a winding space for the transformer coil.

[0007] Preferably, the fixing components at both ends of the connecting assembly are symmetrically arranged; the connecting assembly includes two connecting beams, the spacing between the two connecting beams matching the size of the main iron core of the transformer coil; the connecting beams are provided with connecting grooves along their length.

[0008] Preferably, the end of the connecting beam extends out of the limiting through groove and forms a detachable connection with the base; the spacer is located between the side plate and the base and is used to adjust the distance between the side plate and the base.

[0009] Preferably, the side plate is provided with a limiting through groove two for extending the end of the secondary iron core of the transformer coil; a pressure plate assembly is detachably provided on the limiting through groove two for limiting the secondary iron core of the transformer coil.

[0010] Preferably, the limiting through groove is a U-shaped opening groove; the pressure plate assembly includes an end pressure plate and a limiting pressure plate; the end pressure plate is disposed on one side of the U-shaped opening groove and is used to limit the end face of the secondary iron core of the transformer coil; the limiting pressure plate is detachably disposed at the opening end of the U-shaped opening groove and is used to fix the secondary iron core of the transformer coil.

[0011] Preferably, the side plate is detachably provided with a wedge strip for adjusting the fitting gap between the secondary iron core of the transformer coil and the side plate.

[0012] Preferably, both the side plate and the pressure plate assembly are provided with lead wire grooves.

[0013] Preferably, the side plate is provided with a plurality of support bar limiting grooves for fixing and limiting the support bars in the transformer coil.

[0014] Preferably, the end face of the base is provided with a central post for cooperating with the winding machine pin, and the central post is provided with a concave conical mating surface.

[0015] Preferably, the base is provided with at least two sets of drill sleeves, which are used to cooperate with the winding machine power mechanism.

[0016] The application of the technical solution of the present invention has the following beneficial effects:

[0017] (1) In this invention, by detachably connecting the base in the connecting component and the fixing component, the connection and disassembly between the components of the transformer coil and the winding tooling can be conveniently realized; by setting the fixing components at both ends of the connecting component, the main iron core of the transformer can be limited by the limiting through slot of the side plate in the fixing component, thus ensuring the positioning accuracy of the transformer iron core and ensuring the winding quality of the transformer coil.

[0018] (2) In this invention, the height of the main iron core is limited by the spacing between the two connecting beams, the front and rear directions of the main iron core are limited by the limiting through slot, and the left and right directions of the main iron core are limited by the base abutting against the end face of the main iron core, so as to ensure that the positioning position of the main iron core will not change during the winding process.

[0019] (3) In this invention, a connecting groove is provided on the connecting beam along its length direction. The base and the side plate are connected by a spacer. The winding tool can be matched with the main iron core of different specifications by adjusting the connection position of the connecting groove and the base and the length of the spacer, thereby improving the versatility of the winding tool.

[0020] (4) In this invention, by setting a limiting through slot one and a limiting through slot two on the side plate for positioning the main iron core and the auxiliary iron core, the auxiliary iron core can be added to the original winding fixture after the secondary winding is completed, thus ensuring the relative positioning accuracy between the main iron core and the auxiliary iron core.

[0021] (5) In this invention, the limiting through slot 2 is a U-shaped opening slot with an open top, which facilitates the insertion of the auxiliary iron core from the opening end and avoids changes in the positioning accuracy of the main iron core due to the disassembly of the side plate; the end pressure plate is set on one side of the U-shaped opening slot and is used to limit the end face of the auxiliary iron core; the limiting pressure plate is detachably set at the opening end of the U-shaped opening slot and is used to fix the auxiliary iron core of the transformer coil in the vertical direction, thereby ensuring the positioning accuracy of the auxiliary iron core.

[0022] (6) In this invention, a wedge is detachably provided on the side plate. After the secondary iron core is placed into the second limiting slot, the fitting gap between the secondary iron core of the transformer coil and the second limiting slot of the side plate can be adjusted by the wedge to ensure the positioning accuracy of the secondary iron core and prevent the secondary iron core from shaking inside the winding fixture.

[0023] (7) In this invention, the side plate is provided with several support bar limiting grooves to fix and limit the support bars in the transformer coil, so as to prevent the support bars from shifting during the winding process and causing uneven air passages in the transformer coil.

[0024] (8) In this invention, both the side plate and the pressure plate assembly are provided with lead wire grooves, which facilitates fixing the wire outlet position and is beneficial for subsequent wiring personnel to operate.

[0025] (9) In this invention, the base on one side of the winding fixture is fixedly connected to the power mechanism of the winding machine through the drill sleeve. The winding fixture is rotated by the power mechanism of the winding machine to realize the coil winding. The base on the other side of the winding fixture is in contact with the pin of the winding machine through the central column to realize the positioning of the rotation axis of the winding fixture, so as to avoid the winding fixture and the transformer coil from being eccentric or swinging during the winding process.

[0026] (10) In this invention, a drill bushing made of 45# steel is placed inside the connection hole of the base. By using the drill bushing with high hardness to cooperate with the winding machine power mechanism, the deformation of the connection hole on the base can be reduced, thus ensuring the winding quality of the transformer coil.

[0027] (11) The winding fixture of the present invention has a simple structure, light weight, corrosion and rust resistance, and is easy to operate; it is highly adaptable and has many universal parts. After disassembly and assembly, it can be used for winding transformer coils of various specifications, and can also be used with winding machines of different interface specifications.

[0028] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a transformer coil winding fixture according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the transformer coil structure in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the wedge setting in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram illustrating the use of a transformer coil winding fixture in an embodiment of this application;

[0034] Figure 5 This is a side view of a transformer coil winding fixture according to an embodiment of this application;

[0035] Figure 6 This is an embodiment of the present application. Figure 4 The front view;

[0036] Among them, 1. Connecting components, 1.1 Connecting beam, 1.1.1 Connecting groove, 2. Side plate, 2.1 Limiting through groove one, 2.2 Limiting through groove two, 2.3 Wedge, 2.4 Support bar limiting groove, 2.5 Lead wire groove one, 2.6 Lead wire groove two, 2.7 Lead wire groove three, 2.8 Lead wire groove four, 3. Base, 3.1 Center column, 3.2 Drill sleeve, 3.2a Drill sleeve one, 3.2b Drill sleeve two, 4. Spacer, 5. End pressure plate, 6. Limiting pressure plate, 6.1 Lead wire groove five, 6.2 Protrusion, 7. Transformer coil, 7.1 Main iron core, 7.2 Secondary iron core, 7.3 Support bar, 7.4 Electromagnetic wire and insulation material, 8. Winding machine pin, 9. Winding machine power mechanism. Detailed Implementation

[0037] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0038] Example:

[0039] See Figures 1 to 6A transformer coil winding fixture, in this embodiment applied to the coil winding of an auxiliary transformer for rail transit products, see [link to documentation]. Figure 2 The transformer coil 7 to be wound in this application includes a main iron core 7.1 and a secondary iron core 7.2. Multiple layers of electromagnetic wire and insulating material 7.4 need to be wound on the main iron core 7.1 and the secondary iron core 7.2. Several support bars 7.3 are provided between two adjacent layers of electromagnetic wire and insulating material 7.3. The support bars 7.3 include H-beam support bars, round tube support bars, etc., and are used to form several air channels in the transformer coil 7. If the position of the support bars 7.3 changes during the winding process, it will cause the air channels in the transformer coil 7 to be uneven.

[0040] A transformer coil winding fixture (hereinafter referred to as the winding fixture), see [link to documentation]. Figure 1 The assembly includes a connecting component 1 and fixing components disposed at both ends of the connecting component 1; the fixing components include a side plate 2, a base 3 and a spacer 4; the base 3 is detachably connected to the connecting component 1, the side plate 2 is connected to the base 3 through the spacer 4, and the base 3 is connected to the winding machine; the side plate 2 is provided with a limiting through groove 2.1 for extending the end of the main iron core 7.1 of the transformer coil 7, which is used to position the main iron core 7.1; the side plates 2 at both ends of the connecting component 1 are arranged opposite to each other to form a winding space for the transformer coil 7, so that the winding machine can wind the electromagnetic wire and the insulating material 7.4 onto the main iron core 7.1 of the transformer coil 7.

[0041] The fixing components at both ends of the connecting assembly 1 are symmetrically arranged to fix and limit the two ends of the main iron core 7.1 of the transformer coil 7, ensuring the winding accuracy of the transformer coil 7. Figure 4 As shown, the connecting assembly 1 includes two connecting beams 1.1. The spacing between the two connecting beams 1.1 matches the size of the main iron core 7.1 of the transformer coil 7, and is used to limit the height of the main iron core 7.1. The connecting beams 1.1 have connecting grooves 1.1.1 along their length, which are used to achieve a detachable connection between the connecting beams 1.1 and the base 3 by fastening bolts, making it easy to set the transformer coil 7 on the connecting beams 1.1 of the winding fixture. By adjusting the connection position between the connecting beams 1.1 and the base 3, it can be used to fix and limit the main iron core 7.1 of different specifications, improving the versatility of the winding fixture.

[0042] The end of the connecting beam 1.1 extends from the limiting through slot 2.1 and forms a detachable connection with the base 3. The spacer 4 is located between the side plate 2 and the base 3 and is used to adjust the distance between the side plate 2 and the base 3 so that the inner end face of the base 3 abuts against the end face of the main iron core 7.1, thereby limiting the left and right directions of the main iron core 7.1. In this embodiment, the spacer 4 is a sleeve with a through hole. The fastening bolt 2 on the base 3 passes through the sleeve and connects to the side plate 2. The distance between the side plate 2 and the base 3 is adjusted by controlling the length of the spacer 4. This is suitable for limiting the end of the main iron core 7.1 of different specifications, improving the versatility of the winding fixture. In this embodiment, the fastening bolt 2 is an M10*30 socket head cap screw, which is set at the four corners of the base 3 to achieve equidistant connection between the four corners of the base 3 and the side plate 2.

[0043] The side plate 2 is provided with a limiting through slot 2.2 for extending the end of the secondary iron core 7.2 of the transformer coil 7; a pressure plate assembly is detachably provided on the limiting through slot 2.2 for limiting the secondary iron core 7.2 of the transformer coil 7. During the winding process, the secondary winding needs to be wound first through the main iron core 7.1, and then the secondary iron core 7.2 is placed into the winding fixture for primary winding. The limiting through slots 2.1 and 2.2 on the side plate 2, which are used to position the main iron core 7.1 and the secondary iron core 7.2 respectively, can ensure the relative positioning accuracy between the main iron core 7.1 and the secondary iron core 7.2 and avoid large positional deviations between the main iron core 7.1 and the secondary iron core 7.2.

[0044] The limiting through slot 2.2 is a U-shaped opening slot, which facilitates the insertion of the secondary iron core 7.2 from the top opening end of the side plate 2, avoiding changes in the positioning accuracy of the main iron core 7.1 due to the disassembly of the side plate 2. The pressure plate assembly includes an end pressure plate 5 and a limiting pressure plate 6. The end pressure plate 5 is disposed on one side of the U-shaped opening slot and is used to limit the end face of the secondary iron core 7.2 of the transformer coil 7. The limiting pressure plate 6 is detachably disposed at the opening end of the U-shaped opening slot and is used to fix the secondary iron core 7.2 of the transformer coil 7 vertically, thereby ensuring the positioning accuracy of the secondary iron core 7.2. In this embodiment, gaps are formed between the end pressure plate 5 and the limiting pressure plate 6, and between the end pressure plate 5 and the limiting through slot 2.2, for the extension of the end connecting plate of the secondary iron core 7.2. Figure 4 and Figure 6 As mentioned above, interference between the winding fixture and the secondary iron core 7.2 should be avoided.

[0045] In this embodiment, both the end pressure plate 5 and the limiting pressure plate 6 are machined using 6082-T651 series aluminum alloy as the main material. The end pressure plate 5 is used to limit the end of the secondary iron core 7.2, and the protrusion 6.2 of the limiting pressure plate 6 is used to limit the top of the secondary iron core 7.2, so as to ensure the positioning accuracy of the secondary iron core 7.2, thereby ensuring that the product (i.e., transformer coil 7) dimensions meet the winding requirements.

[0046] To facilitate the placement of the secondary iron core 7.2 into the limiting through slot 2.2, a certain gap (1-3mm) exists between the limiting through slot 2.2 and the mating surface of the secondary iron core 7.2. A wedge 2.3 is detachably provided on the side plate 2. After the secondary iron core 7.2 is placed into the limiting through slot 2.2, the mating gap between the secondary iron core 7.2 of the transformer coil 7 and the limiting through slot 2.2 of the side plate 2 can be adjusted using the wedge 2.3 to ensure the positioning accuracy of the secondary iron core 7.2 and prevent the secondary iron core 7.2 from shaking inside the winding fixture. Figure 3 As shown. In this embodiment, the wedge 2.3 is machined using 6082-T651 series aluminum alloy as the main material, and its dimensions are designed according to the gap adjustment requirements.

[0047] The side plate 2 is provided with several support bar limiting grooves 2.4, which are used to fix and limit the support bars 7.3 in the transformer coil 7. During the winding process, the end of the support bar 7.3 extends about 5mm and enters the support bar limiting grooves 2.4 of the two side plates 2 to limit the support bars 7.3 of each layer, preventing uneven air passages in the transformer coil.

[0048] Both the side plate 2 and the pressure plate assembly are provided with lead wire grooves. In this embodiment, lead wire groove 1 2.5, lead wire groove 2.6, lead wire groove 3 2.7 and lead wire groove 4 2.8 are provided in the middle and bottom of the side plate 2, respectively. Lead wire groove 5 6.1 is provided on the limiting pressure plate 6 of the pressure plate assembly, which facilitates fixing the wire outlet position and is beneficial for subsequent wiring operations.

[0049] In this embodiment, the side plate 2 is made of 6082-T651 series aluminum alloy as the main material and is machined. The main plate thickness is 24mm, and the four sides are designed with rounded corners to prevent sharp parts from accidentally injuring operators. The position of the support bar limiting groove 2.4 is matched with the arrangement of the support bars 7.3 on the transformer coil 7 to achieve the limiting function of the support bars 7.3 in the transformer coil 7.

[0050] The base 3 has a central post 3.1 on its end face for engaging with the winding machine pin 8. The central post 3.1 has a concave tapered mating surface. In this embodiment, the central post 3.1 is made of brass and machined to improve its wear resistance and service life. The tapered mating surface is smooth and has high precision. During winding, the tapered mating surface on the central post 3.1 contacts and engages with the winding machine pin 8. The central post 3.1 and the winding fixture rotate around the tip of the pin to achieve coil winding.

[0051] At least two sets of drill sleeves 3.2 are provided on the base 3. The drill sleeves 3.2 are used to cooperate with the winding machine power mechanism 9. The intersection of the center lines of the two sets of drill sleeves 3.2 coincides with the center of the central column 3.1. During the winding process, the base 3 on one side of the winding fixture is fixedly connected to the winding machine power mechanism 9 through the drill sleeves 3.2. The winding machine power mechanism 9 drives the winding fixture to rotate, thereby realizing the coil winding. The base 3 on the other side of the winding fixture is in contact with the winding machine ejector pin 8 through the central column 3.1 to realize the positioning of the rotation axis of the winding fixture, so as to avoid the winding fixture and transformer coil 7 from being eccentric or swinging during the winding process.

[0052] In this embodiment, the main body of the base 3 is machined from 6082-T651 series aluminum alloy to support the center column 3.1 and the drill sleeve 3.2. The main body of the base 3 is press-fitted with the center column 3.1 and the drill sleeve 3.2. Since the main body of the base 3 is relatively soft, if the connecting hole on the main body of the base 3 is directly fitted with the interface boss of the winding machine power mechanism 9, the connecting hole of the base 3 will become larger due to wear after long-term operation, resulting in inaccurate positioning. During winding, the winding fixture will become eccentric and swing, resulting in a large deviation in coil size and affecting product quality. Therefore, the present invention sets the drill sleeve 3.2, made of 45# steel, inside the connecting hole. The drill sleeve 3.2, which has a higher hardness, fits with the winding machine power mechanism 9, which can reduce the deformation of the connecting hole on the base 3 and prevent the winding fixture and the transformer coil 7 from becoming eccentric and swinging during the winding process, thus ensuring the winding quality of the transformer coil 7.

[0053] In this embodiment, two sets of drill sleeves 3.2 with different center hole distances are provided on the end face of the base 3, namely drill sleeve one 3.2a and drill sleeve two 3.2b, as shown below. Figure 5 As shown, the center hole distance between the two drill bushings 3.2a is 78mm, and the center hole distance between the two drill bushings 3.2b is 62mm. They are used to connect with the winding machine power mechanism 9 with different connector specifications, thereby improving the versatility of the winding tooling.

[0054] The method of using the above-mentioned transformer coil winding fixture is as follows:

[0055] Step 1: Place the main iron core 7.1 into the limiting through groove 2.1 of the side plate 2, and connect the connecting component 1 with the side plate 2, the spacer 4 with the base 3;

[0056] Step 2: Place the winding fixture with the main iron core 7.1 horizontally, use a hoist and overhead crane to lift the winding fixture to the winding machine, then fix the drill sleeve 3.2 on the base 3 on one side of the winding fixture to the power mechanism 9 of the winding machine, and mate the central column on the base 3 on the other side of the winding fixture with the center pin 8 of the winding machine, and lock the position of the center pin 8 of the winding machine.

[0057] Step 3: Place in various support bars 7.3 and insulating materials, and begin secondary winding. During the winding process, add support bars 7.3 and insulating materials for each layer according to the design drawings of transformer coil 7.

[0058] Step 4: After completing the secondary side winding, place the secondary iron core 7.2 into the limiting through slot 2.2 of the side plate 2, install the wedge 2.3, end pressure plate 5 and limiting pressure plate 6 to fix the position of the secondary iron core 7.2, and start the primary side winding. During the winding process, add the support bar 7.3 and insulation material for each layer according to the design drawings of the transformer coil 7 until the winding of the transformer coil 7 is completed.

[0059] Step 5: Separate the winding fixture from the winding machine power mechanism 9 and the winding machine pin 8. Use a hoist and overhead crane to lift the winding fixture and transformer coil 7 to the disassembly area. Disconnect the connection between the connecting component 1 and the base 3. Remove the fixing components on both sides of the transformer coil 7. Pull out the connecting beam 1.1 from the transformer coil 7 to obtain the transformer coil 7.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A transformer coil winding fixture, characterized in that, The assembly includes a connecting component (1) and a fixing component disposed at both ends of the connecting component (1); the fixing component includes a side plate (2), a base (3) and a spacer (4); the base (3) is detachably connected to the connecting component (1), and the side plate (2) is connected to the base (3) through the spacer (4); the side plate (2) is provided with a limiting through groove (2.1) for extending the end of the main iron core of the transformer coil; the side plates (2) at both ends of the connecting component (1) are arranged opposite to each other to form the winding space of the transformer coil; The fixing components at both ends of the connecting assembly (1) are symmetrically arranged; the connecting assembly (1) includes two connecting beams (1.1), and the spacing between the two connecting beams (1.1) matches the size of the main iron core of the transformer coil; the connecting beam (1.1) is provided with a connecting groove (1.1.1) along its length direction. The end of the connecting beam (1.1) extends out from the limiting through groove (2.1) and forms a detachable connection with the base (3); the spacer (4) is located between the side plate (2) and the base (3) and is used to adjust the distance between the side plate (2) and the base (3).

2. The transformer coil winding fixture according to claim 1, characterized in that, The side plate (2) is provided with a limiting through groove 2 (2.2) for extending the end of the secondary iron core of the transformer coil; the limiting through groove 2 (2.2) is detachably provided with a pressure plate assembly for limiting the secondary iron core of the transformer coil.

3. The transformer coil winding fixture according to claim 2, characterized in that, The limiting through slot 2 (2.2) is a U-shaped opening slot; the pressure plate assembly includes an end pressure plate (5) and a limiting pressure plate (6); the end pressure plate (5) is disposed on one side of the U-shaped opening slot and is used to limit the end face of the secondary iron core of the transformer coil; the limiting pressure plate (6) is detachably disposed at the opening end of the U-shaped opening slot and is used to fix the secondary iron core of the transformer coil.

4. The transformer coil winding fixture according to claim 3, characterized in that, The side plate (2) is detachably provided with a wedge (2.3) for adjusting the fit gap between the secondary iron core of the transformer coil and the side plate (2).

5. A transformer coil winding fixture according to claim 3, characterized in that, Both the side plate (2) and the pressure plate assembly are provided with lead wire grooves.

6. A transformer coil winding fixture according to any one of claims 1 to 5, characterized in that, The side plate (2) is provided with several support bar limiting grooves (2.4) for fixing and limiting the support bars in the transformer coil.

7. A transformer coil winding fixture according to claim 1, characterized in that, The base (3) has a central post (3.1) on its end face for cooperating with the winding machine pin, and the central post (3.1) has a concave conical mating surface.

8. A transformer coil winding fixture according to claim 7, characterized in that, The base (3) is provided with at least two sets of drill sleeves (3.2), which are used to cooperate with the winding machine power mechanism.

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