Novel winding mandrel for electromagnetic coil winding
By designing the hollow transmission pin and the winding mandrel of the limit structure, the problems of rotation out-synchronization and squirming during the winding process are solved, ensuring the accuracy and flatness of the turns of the electromagnetic coil, and simplifying the loading and unloading process of the electromagnetic coil.
Patent Information
- Application Number
- CN202510623185.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2025-08-15
AI Technical Summary
During the existing electromagnetic coil winding process, the rotation of the winding mandrel and the solenoid coil frame is not synchronized and the axial movement problems affecting the accuracy and flatness of the turns, and it is difficult to load and unload.
A new type of winding mandrel is designed, including a transmission pin, flange and connecting shaft with a hollow structure. The transmission pin is equipped with a gap and a limiting pin. Combined with the limiting screw hole, it ensures that the solenoid coil frame rotates synchronously with the winding machine to avoid squirming.
It realizes accurate turns and high flatness during the winding process of electromagnetic coil, avoids jumping and disconnection of wires, and facilitates installation and disassembly of electromagnetic coils.
Smart Images
Figure CN120497036A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electromagnetic coils, in particular to a novel winding core shaft for winding electromagnetic coils. Background Art
[0002] Industrial automation and artificial intelligence have made widespread inroads into various fields, significantly boosting the widespread use of various components, including solenoid valves, sensors, and electromagnets. Solenoid coils are essential core components in these systems, and their quality directly impacts the electromagnetic performance of these components. These requirements necessitate high control precision, reliable operation, and durability, placing higher demands on technical parameters such as the number of turns and flatness of the coils.
[0003] like Figure 1 As shown, currently, electromagnetic coils are all wound on various winding machines using a winding mandrel 100. To ensure reliable transmission of rotational torque during winding, the outer diameter of the winding mandrel 100 drive pin and the inner hole of the electromagnetic coil bobbin 200 generally adopt an interference fit. To facilitate the assembly and disassembly of the electromagnetic coil before and after winding, the interference fit should be appropriate and not too large. Because the winding mandrel 100 drive pin is a solid structure, its outer diameter size is a single fixed size after processing. The inner hole size of the electromagnetic coil bobbin 200 is affected by manufacturing tolerances and is prone to a small gap fit with the winding mandrel 100 drive pin. This causes the winding mandrel 100 drive pin and the electromagnetic coil bobbin 200 to rotate out of sync, affecting the accuracy of the number of turns of the electromagnetic coil. At the same time, due to the small gap fit between the outer diameter of the winding mandrel 100 drive pin and the inner hole of the electromagnetic coil bobbin 200, the electromagnetic coil will experience axial movement during the winding process, affecting the smoothness of the coil winding. If the outer diameter of the transmission pin of the winding core shaft 100 is increased, the outer diameter of the transmission pin of the winding core shaft 100 and the inner hole of the electromagnetic coil frame 200 will have a large interference fit, which will increase the difficulty of loading and unloading the electromagnetic coil before and after winding. Summary of the Invention
[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a new winding core shaft for winding electromagnetic coils.
[0005] The present invention discloses the following technical solution: a new winding core shaft for winding electromagnetic coils, comprising a transmission pin, a flange and a connecting shaft, wherein the transmission pin is coaxially arranged with the connecting shaft, the connecting shaft is used to be connected to a winding machine, the flange is located between the transmission pin and the connecting shaft, the transmission pin is a hollow structure, a gap is provided in the transmission pin along the axial direction, and a limit pin corresponding to the through hole on the electromagnetic coil skeleton is provided on the side of the flange close to the transmission pin.
[0006] Furthermore, there are four slits, which are evenly distributed on the transmission pin.
[0007] Furthermore, the cross-section of the front end of the transmission pin is in the shape of an arc, and both sides of the arc are inclined surfaces.
[0008] Furthermore, an annular groove is provided near the flange of the transmission pin.
[0009] Furthermore, the positioning shaft is provided with a limiting threaded hole, and the limiting threaded hole is arranged along the radial direction of the positioning shaft.
[0010] Beneficial effects: Compared with the prior art, the winding core shaft of the present invention can limit the electromagnetic coil frame in the axial and radial directions, ensuring that the electromagnetic coil frame and the winding core shaft rotate synchronously without axial movement, thereby ensuring the number of turns and flatness of the electromagnetic coil after winding; the transmission pin can ensure that the electromagnetic enameled wire has uniform tension during the winding process of the electromagnetic coil, avoiding problems such as wire jumping and wire breakage; the setting of the limit screw hole can ensure that the winding core shaft and the winding machine drive shaft are reliably connected. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the winding mandrel structure in the prior art; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the cooperation between the winding core shaft and the electromagnetic coil skeleton of the present invention; In the figure: 100-winding core shaft, 200-electromagnetic coil skeleton; 1-transmission pin, 2-flange, 3-connecting shaft, 11-gap, 12-annular groove, 21-limiting pin, 31-limiting threaded hole. DETAILED DESCRIPTION
[0012] like Figures 2 to 3 As shown, a new type of winding core shaft for electromagnetic coil winding includes a transmission pin 1, a flange 2 and a connecting shaft 3. The transmission pin 1 is coaxially arranged with the connecting shaft 3, and the connecting shaft 3 is used to connect with the winding machine. The flange 2 is located between the transmission pin 1 and the connecting shaft 3. The transmission pin 1 is a hollow structure, and the transmission pin 1 is provided with a gap 11 along the axial direction, so that the outer diameter of the winding core shaft transmission pin 1 has a certain elasticity, thereby compensating for the processing deviation of the inner hole of the electromagnetic coil skeleton 200, ensuring that the electromagnetic coil skeleton 200 and the winding core shaft transmission pin 1 rotate synchronously, so that the number of winding turns of the electromagnetic coil is consistent with the set value of the number of turns of the winding machine, and a limit pin 21 corresponding to the through hole on the electromagnetic coil skeleton 200 is provided on the side of the flange 2 near the transmission pin 1. During the winding process, the limit pin 21 cooperates with the electromagnetic coil skeleton 200, and the electromagnetic coil skeleton 200 rotates synchronously with the transmission pin 1, ensuring that the electromagnetic coil is evenly stressed and avoiding the occurrence of wire jumping; There are four slits 11, which are evenly distributed on the transmission pin 1, to ensure that the electromagnetic coil skeleton 200 is evenly tensioned by the transmission pin 1 when rotating; The front end cross section of the drive pin 1 is arc-shaped, and the two sides of the arc are inclined surfaces. When installing and removing the electromagnetic coil bobbin 200, an axial push-pull force is applied to the electromagnetic coil bobbin 200. The inclined surfaces can serve as a guide to squeeze the inner ring of the electromagnetic coil bobbin 200 to squeeze the drive pin 1 inward, thereby facilitating the installation and removal of the electromagnetic coil and preventing the electromagnetic coil bobbin 200 from axial movement when winding the wire. The driving pin 1 is provided with an annular groove 12 near the flange 2. Since the diameter of the annular groove 12 is smaller than the inner diameter of the electromagnetic coil skeleton 200, it is ensured that the electromagnetic coil skeleton 200 is tightly attached to the flange 2 when installed, and the electromagnetic coil winding width is consistent with the setting width of the winding machine; A limiting threaded hole 31 is provided on the positioning shaft, and the limiting threaded hole 31 is arranged radially along the positioning shaft. When installing the winding core shaft, the positioning shaft is installed into the winding machine, and the limiting screw is screwed into the limiting threaded hole 31, so that the winding core shaft is reliably connected to the winding machine, ensuring that the winding core shaft will not be displaced on the winding machine.
[0013] When in use, first install the winding core shaft on the winding machine, and then install the electromagnetic coil frame 200 on the winding core shaft, so that the through hole on the electromagnetic coil frame 200 cooperates with the positioning pin, and the end of the transmission pin abuts against the electromagnetic coil frame 200, and the electromagnetic coil frame 200 is limited axially and radially. After setting the required winding technical parameters on the winding machine and loading the electromagnetic enameled wire that meets the technical requirements, start the winding machine to complete the electromagnetic coil winding. During the winding process, the electromagnetic coil frame 200 rotates synchronously with the transmission pin, and no axial movement occurs, which effectively ensures that the number of turns of the electromagnetic coil is consistent with the number of turns set by the winding machine, while ensuring the flatness of the coil and facilitating the disassembly and assembly of the electromagnetic coil frame 200.
[0014] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.
Claims
1. A new winding mandrel for winding electromagnetic coils, comprising a drive pin (1), a flange (2) and a connecting shaft (3), wherein the drive pin (1) and the connecting shaft (3) are coaxially arranged, the connecting shaft (3) is used to connect to a winding machine, and the flange (2) is located between the drive pin (1) and the connecting shaft (3), characterized in that: The transmission pin (1) is a hollow structure, and a gap (11) is provided in the transmission pin (1) along the axial direction. A limiting pin (21) corresponding to the through hole on the electromagnetic coil frame (200) is provided on the flange (2).
2. The novel winding mandrel for electromagnetic coil winding according to claim 1, characterized in that: There are four slits (11) evenly distributed on the transmission pin (1).
3. The novel winding mandrel for electromagnetic coil winding according to claim 1, characterized in that: The front end cross section of the transmission pin (1) is in the shape of an arc, and both sides of the arc are inclined surfaces.
4. The novel winding mandrel for electromagnetic coil winding according to claim 1, characterized in that: The transmission pin (1) is provided with an annular groove (12) near the flange (2).
5. The novel winding mandrel for electromagnetic coil winding according to claim 1, characterized in that: A limiting threaded hole (31) is provided on the positioning shaft, and the limiting threaded hole (31) is arranged along the radial direction of the positioning shaft.