Frameless coil paint dipping clamp
By designing a frameless coil varnish dipping fixture and utilizing components such as a spindle, a limit gasket, and a thrust bearing, the problem of deformation and damage of the process frame during the winding and varnish dipping of the frameless coil is solved, thus achieving a low-cost and efficient production process.
Patent Information
- Application Number
- CN202422364703.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-27
AI Technical Summary
During the winding and varnishing process of the frameless coil, the process frame is deformed and damaged due to destruction and disassembly, resulting in high production costs and low efficiency.
A frameless coil varnish dipping fixture is used, including components such as a spindle, a limit washer, a flat washer, a release nut and a stop bushing. Through the cooperation of the limit and thrust bearing, the coil can be reliably positioned and conveniently disassembled, avoiding the destruction of the process skeleton.
The coil is positioned reliably on the fixture and is easy to disassemble, which reduces production costs, improves production efficiency, and allows the process skeleton to be reused.
Smart Images
Figure CN223486861U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electromagnetic coil processing and manufacturing technology, and in particular relates to a frameless coil impregnation fixture. Background Technology
[0002] Currently, domestic electromagnetic coils are divided into two main categories: framed coils and frameless coils. Frameless coils lack stable internal components for support, so a process is required to fill the coil with a process frame during winding. After winding, the coil is impregnated with insulating varnish, dried at high temperature, and then the previously filled process frame is removed to obtain the finished coil. However, the production of frameless electromagnet coils requires a one-to-one matching process frame with the coil during winding. Removing the process frame after impregnation and drying is destructive, leading to deformation and damage that renders the process frame unusable, resulting in high production costs and low efficiency.
[0003] Existing process skeleton elastic sleeve 9 such Figure 7 As shown, the process skeleton elastic sleeve is a hollow structure with a slot on one side. When winding the coil, a solid shaft is filled inside the process skeleton elastic sleeve 9 to maintain the shape of the outer diameter of the shaft. After the coil is wound, the coil is impregnated with varnish and baked at high temperature. After the baking is completed, the solid shaft is removed first, and then the process skeleton elastic sleeve is subjected to radial clamping force with clamps. Under the action of radial clamping force, the diameter of the process skeleton elastic sleeve shrinks along the slot. When its diameter is smaller than the inner diameter of the coil, the process skeleton elastic sleeve can be removed from the coil. However, because the process skeleton elastic sleeve is deformed by the clamping force, it cannot be restored to its original diameter size, resulting in the scrapping of the process skeleton. Utility Model Content
[0004] Utility Model Purpose
[0005] To solve the above-mentioned technical problems, this utility model provides a frameless coil impregnation fixture.
[0006] Utility Model Technical Solution
[0007] A frameless coil impregnation fixture includes a mandrel, a limiting washer, and a flat washer disposed on the mandrel. The coil is wound on the mandrel and located between the limiting washer and the flat washer. The flat washer is axially limited by a release nut connected to the mandrel, and the limiting washer is axially limited by a nut connected to the mandrel.
[0008] Preferably, the outer diameter of the section where the mandrel is wound with the coil is larger than the maximum outer diameter of the end where the limiting shim is set.
[0009] Preferably, the release nut is threaded onto the spindle.
[0010] Preferably, the nut is threaded onto the spindle.
[0011] Preferably, a stop bushing is provided between the release nut and the spindle, and the two ends of the stop bushing are axially limited by the release nut and the spindle, respectively.
[0012] Preferably, the mandrel mounting nut has a flat section on each of its two opposite sides.
[0013] Preferably, it also includes a thrust bearing, which is positioned between the flat washer and the release nut when the coil is disassembled.
[0014] The advantages of this utility model are: the fixture has a simple and reasonable structure, is practical and can be reused; the coil is securely positioned on the fixture; and the coil is easy to remove from the fixture after being impregnated with varnish. Attached Figure Description
[0015] Figure 1 This is a structural diagram of a frameless coil impregnation fixture according to this utility model.
[0016] Figure 2 This is a schematic diagram of the structure of a frameless coil impregnation fixture after mounting a frameless coil according to the present invention.
[0017] Figure 3 This is a schematic diagram of coil installation in a frameless coil impregnation fixture according to the present invention.
[0018] Figure 4 , Figure 5 This is a schematic diagram of the structure after disassembly, including removing the nut, limit washer, and stop bushing, and installing the thrust bearing.
[0019] Figure 6 This is a schematic diagram of the mandrel structure.
[0020] Figure 7 This is a schematic diagram of the elastic sleeve of the process skeleton before the improvement.
[0021] In the diagram, 1-nut, 2-limiting washer, 3-spindle, 5-flat washer, 6-release nut, 7-stop bushing, 8-thrust bearing, and 9-elastic sleeve. Detailed Implementation
[0022] This utility model is achieved through the following technical solution.
[0023] A frameless coil impregnation fixture includes a nut 1, a limiting washer 2, a spindle 3, a flat washer 5, a release nut 6, a stop bushing 7, and a thrust bearing 8.
[0024] Limiting washer 2 and flat washer 5 are mounted on spindle 3. The coil is wound on spindle 3 and located between limiting washer 2 and flat washer 5. Flat washer 5 is axially limited by release nut 6 threaded to spindle 3. Stop bushing 7 is provided between release nut 6 and spindle 3, with both ends of stop bushing 7 axially limited by release nut 6 and spindle 3 respectively. Limiting washer 2 is axially limited by nut 1 threaded to spindle 3.
[0025] The mandrel 3 has a flat section on one of its two opposite sides, which is used for torque transmission during the threaded motion.
[0026] The clamp is used as follows: Press Figure 2 As shown in the assembly fixture, the limiting washer 2 is tightened and fixed to the mandrel 3 using nut 1. The flat washer 5 is then installed on the mandrel 3. The stop bushing 7 and the release nut 6 are then inserted sequentially at the end of the mandrel 3 near the flat washer 5. Tightening the release nut 6 allows a coil winding area to be formed on the fixture through the cooperation of the limiting washer 2, mandrel 3, and flat washer 5. Coil winding is then performed within this area.
[0027] After the coil is wound, the fixture and the coil on it are immersed in insulating varnish and then sent to an oven to dry the insulating varnish according to the coil manufacturing process parameters.
[0028] After drying, remove the clamp with the coil, remove nut 1 and limit washer 2, clamp the mandrel 3 with the limit washer 2 on a flat structure in a bench vise, and keep the clamp vertical with one end of the coil facing the ground.
[0029] Remove the release nut 6 and take out the stop bushing 7, then press... Figure 4 As shown, the thrust bearing 8 is installed at one end of the flat washer 5, and the release nut 6 is reinstalled. A wrench is then used to continuously apply force to the release nut 6. With the interaction between the threads on the mandrel 3 and the threads of the release nut 6, the release nut 6 will continuously push the thrust bearing 8 axially along the mandrel 3, causing the flat washer 5 to push the coil out of the clamp. Once the coil is completely separated from the mandrel 3, the finished coil is obtained. Simultaneously, the clamp is cleaned with insulating varnish remover to prepare it for reuse. During disassembly, the thrust bearing 8 is placed between the flat washer 5 and the release nut so that the release nut 6 only transmits axial thrust during the coil release process, without transmitting radial friction, thus protecting the coil.
[0030] Throughout the process, the coil is reliably positioned on the fixture and is easy and quick to disassemble. This effectively solves the problems of high production costs and low efficiency caused by the need for a one-to-one matching process frame to the coil winding when manufacturing existing frameless electromagnet coils, and the destructive disassembly of the process frame after the coil is impregnated and dried, which leads to deformation, damage and inability to be reused.
[0031] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model. The technologies, shapes, and structures not described in detail in this utility model are all known technologies.
Claims
1. A frameless coil impregnation fixture, characterized in that, The mandrel (3), the limiting washer (2), and the flat washer (5) are arranged on the mandrel (3). The coil is wound on the mandrel (3) and located between the limiting washer (2) and the flat washer (5). The flat washer (5) is axially limited by the release nut (6) connected to the mandrel (3). The limiting washer (2) is axially limited by the nut (1) connected to the mandrel (3).
2. The frameless coil impregnation fixture as described in claim 1, characterized in that, The outer diameter of the section where the mandrel (3) is wound with the coil is greater than the maximum outer diameter of the end where the limiting pad (2) is set.
3. The frameless coil impregnation fixture as described in claim 2, characterized in that, Release nut (6) threaded onto spindle (3).
4. The frameless coil impregnation fixture as described in claim 1, characterized in that, The nut (1) is threaded onto the spindle (3).
5. The frameless coil impregnation fixture as described in claim 1, characterized in that, A stop bushing (7) is provided between the release nut (6) and the spindle (3), and the two ends of the stop bushing (7) are axially limited by the release nut (6) and the spindle (3) respectively.
6. The frameless coil impregnation fixture as described in claim 1, characterized in that, The mandrel (3) and the nut (1) have a flat section on two opposite sides at one end.
7. The frameless coil impregnation fixture as described in claim 1, characterized in that, It also includes a thrust bearing (8), which is positioned between the flat washer (5) and the release nut (6) when the coil is disassembled.