A skeleton-free hollow coil winding jig
By designing a winding fixture with a rectangular column structure consisting of a support body, an upper slider, and a lower slider, the problem of difficult coil removal in existing technologies has been solved, thus improving coil production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN BOULDER ELECTRONIC CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-04
AI Technical Summary
Existing frameless hollow coil winding fixtures are difficult to remove after the coil is wound, resulting in low production efficiency.
Design a winding fixture including a left limiting plate, a right limiting plate and a middle column. The middle column consists of a support body, an upper slider and a lower slider. After winding, the coil can be easily removed by sliding the slider. The middle column has a rectangular column structure, and the slider cooperates with the dovetail groove to achieve sliding.
This makes it easier to remove the coil after winding, thus improving production efficiency.
Smart Images

Figure CN224595372U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coil winding fixture technology, specifically to a frameless hollow coil winding fixture. Background Technology
[0002] An air-core coil is an inductor coil without an iron core, magnetic core, or any other magnetic material as its core. Its inductance is entirely determined by the coil's geometry (number of turns, diameter, length) and the permeability of air. Air-core coils require winding fixtures during production. Currently, the central column dimensions of frameless air-core coil winding fixtures on the market are fixed, making it difficult to remove the coil after winding. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a frameless hollow coil winding fixture. This structure allows for easy removal of the coil after winding, thereby improving coil production efficiency.
[0004] A frameless hollow coil winding fixture includes a left limiting plate, a right limiting plate, and a central column. The central column includes a support body, an upper slider, and a lower slider. The left limiting plate is connected to the left wall of the support body, and the right limiting plate is detachably connected to the right wall of the support body. The upper slider is slidably disposed on the top wall of the support body, and the lower slider is slidably disposed on the bottom wall of the support body. When the right limiting plate is removed, the upper slider can slide downward to the right, and the lower slider can slide upward to the right.
[0005] Preferably, the central column is a rectangular column.
[0006] Preferably, the top wall of the support body is inclined downwards in the direction from left to right, and the bottom wall of the support body is inclined upwards in the direction from left to right. The bottom wall of the upper slider matches the shape of the top wall of the support body, and the top wall of the lower slider matches the bottom wall of the support body.
[0007] Preferably, the top wall of the support body has an upper dovetail groove, the bottom wall of the upper dovetail groove has an upper sliding groove, the bottom wall of the upper slider is connected to the upper dovetail block, the bottom wall of the upper dovetail block is connected to the upper sliding block, the upper dovetail block enters the upper dovetail groove, and the upper sliding block enters the upper sliding groove.
[0008] Preferably, the bottom wall of the support body has a lower dovetail groove, the top wall of the lower dovetail groove has a lower sliding groove, the top wall of the lower slider is connected to the lower dovetail block, the top wall of the lower dovetail block is connected to the lower sliding block, the lower dovetail block enters the lower dovetail groove, and the lower sliding block enters the lower sliding groove.
[0009] Preferably, the right wall of the support is connected to two longitudinally distributed positioning columns, and the right limiting plate has two positioning holes, which can be inserted into the two positioning columns.
[0010] Preferably, the right wall of the support body has a screw hole, and the right limiting plate has a threaded hole, through which the connecting bolt passes into the screw hole.
[0011] Preferably, the front and rear corners of the top of the upper slider and the front and rear corners of the bottom of the lower slider are provided with a number of slots evenly distributed in the left and right direction.
[0012] The beneficial effects of this utility model are as follows: The technical solution includes a central column comprising a support body, an upper slider, and a lower slider. During coil winding, the right limiting plate is connected to the support body, and the support body, upper slider, and lower slider form a rectangular column shape for coil winding. After coil winding is complete, the right limiting plate is removed. At this time, the upper slider is slid downwards to the right, and the lower slider is slid upwards to the right, shortening the distance between the upper and lower sliders. This allows for easy removal of the wound coil, thus improving coil production efficiency. Attached Figure Description
[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the overall structure after the right limiting plate is removed in this utility model;
[0016] Figure 3 This is a schematic diagram of the overall structure of the upper and lower sliders after they have been removed in this utility model;
[0017] Figure 4 This is a schematic diagram of the overall structure of the upper slider in this utility model;
[0018] Figure 5 This is a schematic diagram of the overall structure of the lower slider in this utility model.
[0019] In the attached diagram, 1-left limiting plate, 2-right limiting plate, 3-center column.
[0020] 31-Support body, 32-Upper slider, 33-Lower slider, 34-Upper dovetail groove, 35-Upper sliding groove, 36-Upper dovetail block, 37-Upper sliding block, 38-Lower dovetail groove, 39-Lower sliding groove, 40-Lower dovetail block, 41-Lower sliding block, 42-Positioning post. Detailed Implementation
[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0022] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
[0023] Example 1
[0024] like Figures 1-5 As shown, this embodiment provides a frameless hollow coil winding fixture, including a left limiting plate 1, a right limiting plate 2, and a central column 3. The central column 3 includes a support body 31, an upper slider 32, and a lower slider 33. The left limiting plate 1 is connected to the left wall of the support body 31, and the right limiting plate 2 is detachably connected to the right wall of the support body 31. The upper slider 32 is slidably disposed on the top wall of the support body 31, and the lower slider 33 is slidably disposed on the bottom wall of the support body 31. When the right limiting plate 2 is removed, the upper slider 32 can slide downward to the right, and the lower slider 33 can slide upward to the right. In this embodiment, the central column 3 is a rectangular column.
[0025] In this embodiment, the central column 3 includes a support body 31, an upper slider 32, and a lower slider 33. During the coil winding process, the right limiting plate 2 is connected to the support body 31. The support body 31, the upper slider 32, and the lower slider 33 form a rectangular column shape for coil winding. After the coil is wound, the right limiting plate 2 is removed. At this time, the upper slider 32 is slid downwards to the right, and the lower slider 33 is slid upwards to the right, shortening the distance between the upper slider 32 and the lower slider 33. This allows the wound coil to be easily removed, thus improving coil production efficiency.
[0026] In this embodiment, the top wall of the support 31 is inclined downwards from left to right, and the bottom wall of the support 31 is inclined upwards from left to right. The bottom wall of the upper slider 32 matches the shape of the top wall of the support 31, and the top wall of the lower slider 33 matches the bottom wall of the support 31.
[0027] In this embodiment, the support body 31 has an upper dovetail groove 34 on its top wall and an upper sliding groove 35 on its bottom wall. The bottom wall of the upper slider 32 is connected to the upper dovetail block 36, and the bottom wall of the upper dovetail block 36 is connected to the upper sliding block 37. The upper dovetail block 36 enters the upper dovetail groove 34, and the upper sliding block 37 enters the upper sliding groove 35.
[0028] In this embodiment, the upper dovetail groove 34, upper sliding groove 35, upper dovetail block 36, and upper sliding block 37 work together to enable the upper slider 32 to slide on the top wall of the support body 31.
[0029] In this embodiment, the bottom wall of the support body 31 is provided with a lower dovetail groove 38, and the top wall of the lower dovetail groove 38 has a lower sliding groove 39. The top wall of the lower slider 33 is connected to the lower dovetail block 40, and the top wall of the lower dovetail block 40 is connected to the lower sliding block 41. The lower dovetail block 40 enters the lower dovetail groove 38, and the lower sliding block 41 enters the lower sliding groove 39.
[0030] In this embodiment, the lower slide block 33 is slidably mounted on the bottom wall of the support body 31 by the cooperation of the lower dovetail groove 38, the lower slide groove 39, the lower dovetail block 40 and the lower sliding block 41.
[0031] In this embodiment, the right wall of the support 31 is connected to two longitudinally distributed positioning posts 42. Two positioning holes are provided on the right limiting plate 2, allowing the two positioning posts 42 to enter. The cooperation between the positioning posts 42 and the positioning holes in this embodiment facilitates the positioning and installation of the right limiting plate 2.
[0032] In this embodiment, the support body 31 has a screw hole on its right wall, and the right limiting plate 2 has a threaded hole. The connecting bolt passes through the threaded hole and enters the screw hole. In this embodiment, the support body 31 and the right limiting plate 2 are detachably connected by the connecting bolt.
[0033] In this embodiment, several slots evenly distributed in the left-right direction are opened at the front and rear corners of the top of the upper slider 32 and the front and rear corners of the bottom of the lower slider 33. The opening of these slots at the front and rear corners of the top of the upper slider 32 and the front and rear corners of the lower slider 33 ensures flatness during coil winding.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A frameless hollow coil winding fixture, characterized in that, It includes a left limiting plate (1), a right limiting plate (2) and a central column (3). The central column (3) includes a support body (31), an upper slider (32) and a lower slider (33). The left limiting plate (1) is connected to the left wall of the support body (31), and the right limiting plate (2) is detachably connected to the right wall of the support body (31). The upper slider (32) is slidably disposed on the top wall of the support body (31), and the lower slider (33) is slidably disposed on the bottom wall of the support body (31). When the right limiting plate (2) is removed, the upper slider (32) can slide to the lower right, and the lower slider (33) can slide to the upper right.
2. The frameless hollow coil winding fixture according to claim 1, characterized in that, The central column (3) is a rectangular column.
3. The frameless hollow coil winding fixture according to claim 1, characterized in that, The top wall of the support (31) is inclined downwards from left to right, and the bottom wall of the support (31) is inclined upwards from left to right. The bottom wall of the upper slider (32) matches the shape of the top wall of the support (31), and the top wall of the lower slider (33) matches the bottom wall of the support (31).
4. The frameless hollow coil winding fixture according to claim 3, characterized in that, The support (31) has an upper dovetail groove (34) on its top wall and an upper sliding groove (35) on its bottom wall. The upper slider (32) is connected to an upper dovetail block (36) on its bottom wall and an upper sliding block (37) on its bottom wall. The upper dovetail block (36) enters the upper dovetail groove (34) and the upper sliding block (37) enters the upper sliding groove (35).
5. A frameless hollow coil winding fixture according to claim 3, characterized in that, The bottom wall of the support (31) has a lower dovetail groove (38), and the top wall of the lower dovetail groove (38) has a lower sliding groove (39). The top wall of the lower slider (33) is connected to the lower dovetail block (40), and the top wall of the lower dovetail block (40) is connected to the lower sliding block (41). The lower dovetail block (40) enters the lower dovetail groove (38), and the lower sliding block (41) enters the lower sliding groove (39).
6. A frameless hollow coil winding fixture according to claim 1, characterized in that, The right wall of the support (31) is connected to two longitudinally distributed positioning columns (42), and two positioning holes are opened on the right limiting plate (2), so that the two positioning columns (42) can enter the two positioning holes.
7. A frameless hollow coil winding fixture according to claim 6, characterized in that, The support body (31) has a screw hole on its right wall, and the right limiting plate (2) has a threaded hole. The connecting bolt passes through the threaded hole and enters the screw hole.
8. A frameless hollow coil winding fixture according to claim 1, characterized in that, The front and rear corners of the top of the upper slider (32) and the front and rear corners of the bottom of the lower slider (33) are each provided with a number of slots evenly distributed in the left and right direction.