A winding process for enameled wire on a cup-shaped winding

Abstract

The present invention relates to a winding process for a coil winding, and particularly to a winding process for an enameled wire on a cup-shaped winding. The process includes the following steps: Step 1, wind the coil onto a winding device; Step 2, start winding after the device is preheated, and heating zones and non-heating zones are arranged at intervals on the outer periphery of the turntable of the winding device; Step 3, stop the device and remove the coil until the number of coils meets the requirements of the winding; Step 4, bend each non-heating section to form a single-phase coil winding. The winding process of the present invention is simple, and the coils are bonded while winding, which can not only avoid the scattering caused during the conventional coil winding process, but also facilitate the shaping of the coils. In addition, through the arrangement of interval heating of the winding turntable, the present invention enables the bending to be smoothly completed without damaging the coils, improves the bending efficiency, and the heating section still remains in a hardened state without destroying the overall structure of the winding.

Description

Technical Field

[0001] The present invention relates to a winding process of a coil winding, and particularly to a winding process of an enameled wire on a cup-shaped winding. Background Art

[0002] The cup-shaped winding is in the shape of a hollow cylinder, and a cylindrical stator core is sleeved outside it. An assembly structure is formed by inserting the cup-shaped winding into the stator core from one end of the stator core. The cup-shaped coil windings in the current market mainly have the following several structures:

[0003] (1), Winding type - combination of inclined line segments and straight line segments;

[0004] (2), Inclined winding type - 90° or 180° diagonal inclined line segments;

[0005] (3), Rhombic type - upper and lower equilateral inclined line segments;

[0006] When using the above several cup-shaped coil windings, there are generally problems of complex manufacturing processes in the winding process. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a winding process of an enameled wire on a cup-shaped winding with simple operation.

[0008] The present invention is realized as follows:

[0009] The winding process of the enameled wire on the cup-shaped winding of the present invention specifically includes the following steps:

[0010] Step 1, Wind the coil onto the winding device, and leave a certain length of connection heads at both free ends of the coil;

[0011] Step 2, After preheating the device, start winding. Heating zones and non-heating zones are arranged at intervals on the outer circumference of the turntable of the winding device, so that the coil is circumferentially divided into a heating section and a non-heating section; during the winding process, multiple superimposed coils are bonded together due to the effect of heating;

[0012] Step 3, Stop the device and remove the coil until the number of coils meets the requirements of the winding;

[0013] Step 4, The coil is heated, the heating section is hardened, and the non-heating section still retains the bendable property of the enameled wire. Bend each non-heating section to form a single-phase coil winding, and each phase winding has only 1 connection end located inside and 1 connection end located outside.

[0014] Furthermore:

[0015] In the second step, the rotation speed of the winding device is 10 revolutions per minute - 18 revolutions per minute.

[0016] In the third step, after winding the specified number of turns, the turntable stops rotating. At this time, the coil continues to be heated on the turntable for 20 to 30 seconds, and then the coil is removed. This operation is to achieve the best hardening requirements of the coil. If the heating is not continued, the problem of insufficient hardening of the coil will occur.

[0017] In the fourth step, the bending is a 90° upward bend, so as to form a U-shaped wavy coil winding along the circumference.

[0018] The present invention has the following advantages: The winding process of the present invention is simple, and the bonding of the coil is realized while winding. It can not only avoid the scattering caused during the conventional coil winding process, but also be beneficial to the shaping of the coil. In addition, when using a bending tool to bend a conventional unheated coil, large distortion and deformation are likely to occur in the bent wire part, and the wire enamel film is severely damaged, and the operation of personnel is also relatively laborious. Through the setting of intermittent heating of the winding turntable in the present invention, the bending is smoothly completed without damaging the coil, the bending efficiency is improved, and the heated section still maintains the hardened state without destroying the overall structure of the winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings in conjunction with embodiments.

[0020] Figure 1 It is a schematic structural diagram of the winding device of the present invention.

[0021] Figure 2 is Figure 1 The schematic structural diagram after rotational change.

[0022] Figure 3 It is a schematic structural diagram of a semi-circular turntable.

[0023] Figure 4 is Figure 3 The schematic structural diagram after inward contraction change.

[0024] Figure 5 It is the wound coil.

[0025] Figure 6 It is the bent coil winding. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The winding process of the enameled wire on the cup-shaped winding of the present invention specifically includes the following steps:

[0027] Step 1: Wind the coil onto the winding device, and leave a certain length of connection heads at both free ends of the coil;

[0028] Step 2: After the device is preheated, start winding. Heating zones and non-heating zones are arranged at intervals on the outer circumference of the turntable of the winding device, so that the coil is circumferentially divided into a heating section and a non-heating section at intervals; during the winding process, multiple superimposed coils are bonded together due to heating.

[0029] Step 3: Stop the device and remove the coil until the number of coils meets the requirements of the winding.

[0030] Step 4: After the coil is heated, the heating section is hardened, while the non-heating section still retains the bendability of the enameled wire. Bend each non-heating section to form a single-phase coil winding, and each phase winding has only one terminal located inside and one terminal located outside.

[0031] To implement the above process, the present invention also provides a positioning winding device, as Figures 1-4 shown, including a winding turntable 1, a rotating shaft 2, and a motor 3 (including a driving motor and a reduction motor) for driving the rotation of the rotating shaft 2 (the rotating shaft 2 is fixed to the workbench through a bearing seat). The winding turntable 1 includes a support disk 11 fixedly sleeved outside the rotating shaft, and two oppositely arranged semi-circular turntables 12 slidably connected to one side of the support disk 11, so that the distance between the two semi-circular turntables 12 can be adjusted. Heating zones 121 and non-heating zones 122 are arranged at intervals on the outer circumference of the semi-circular turntable 12, so that the coil 100 is circumferentially divided into a heating section 101 and a non-heating section 102 ( Figure 5 ).

[0032] Further, a wire groove 1211 is provided on the surface of the heating zone 121, so that the lengths and spacings of the wire grooves are equal.

[0033] Furthermore, the surface of the heating zone 121 is a plane, so that the coil in this zone is in a straight line segment after being heated and hardened.

[0034] Further, the non-heating zone 122 is U-shaped, so that its upper end does not contact the coil.

[0035] Further, at least one electric heating wire is provided at a position corresponding to the wire groove 1211 in the heating zone 121. The electric heating wire is electrically connected to a slip ring 4 provided at the end of the rotating shaft through a wire (threaded through the hollow rotating shaft), and the electrical connection between the rotating rotating shaft 2 and the fixed heating power supply is realized through the slip ring 4.

[0036] Further, one screw seat 13 is provided on the outside of each of the two semi-circular turntables 12. The screw seat 13 is threadedly connected with an adjusting screw 14, so that the adjusting screw 14 is inserted into both screw seats 13 at the same time and the middle part is rotatably connected with the rotating shaft 2; the threaded sections at both ends of the adjusting screw 14 are arranged in the reverse direction, so that the distance between the two screw seats 13 can be adjusted.

[0037] Further, a notch 123 for the rotation shaft 2 to pass through is provided at the center of the two semi-circular turntables 12, so that when the two semi-circular turntables 12 contract, they are not blocked by the rotation shaft 2.

[0038] Further, adjusting nuts 15 are fixed at both ends of the adjusting screw 14. By utilizing the functions of the forward and reverse threads on the adjusting screw 14 and rotating the adjusting nuts 15, the distance between the two threaded seats 13 on the adjusting screw 14 can be continuously reduced or increased.

[0039] Further, the two semi-circular turntables 12 are slidably connected to the support plate 11 through two semi-circular heat insulation plates 16 that are matched with and fixedly connected to them.

[0040] Further, sliding grooves 161 are provided on the heat insulation plates 16. Correspondingly, sliding guide rails 162 are fixed on the support plate. The sliding grooves and the sliding guide rails are slidably connected, and each sliding groove is parallel to the adjusting screw 14.

[0041] The operation of the winding device is as follows:

[0042] The device is first preheated to a set temperature of 160 - 166 °C (this heating temperature makes the entire heating section adhere firmly, the enameled wire is not easy to spread, and at the same time it is heated and hardened into shape), and then winding is started. When winding, one end is fixed manually, and then the device automatically winds the coil. After winding the specified number of turns, rotation stops. The winding continues to be heated on the disc for 20 to 30 seconds, and then the adjusting nut 15 is rotated to make the two semi-circular turntables 12 contract towards the center, completing the removal of the coil 100 and bending it into a hollow cup shape.

[0043] The formed coil winding after bending ( Figure 6 ) 200 is in a U-shaped wave shape along the circumference. Ineffective segments are generated at the bending positions. The upper ineffective segment 201 bulges inward, and the lower ineffective segment 202 bulges outward, so that the stator core is sleeved into the upper end of the winding and positioned at the lower end. The manufactured product is small in volume and large in power, and can be used as a motor, with a power of 1 kw to 50 Kw. The specific applications are as follows:

[0044] (1) Pure electric tools: lawn mowers, electric saws, etc.;

[0045] (2) Pure electric transportation vehicles: stadium reception vehicles, four-wheel drive pure electric vehicles, etc.;

[0046] (3) Equipment electric vehicles: small electric excavators, electric forklifts, etc.

[0047] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered by the scope protected by the claims of the present invention.

Claims

1. A winding process for enameled wire on a cup-shaped winding, characterized in that: The steps are as follows: Step 1: Wind the coil onto the winding device, and leave a certain length of connection heads at both free ends of the coil. Step 2: After the device is preheated, start winding. The outer periphery of the turntable of the winding device is provided with a heating area and a non-heating area at intervals, so that the coil is circumferentially divided into a heating section and a non-heating section at intervals; during the winding process, multiple superimposed coils are bonded together due to heating, and the heating section is hardened. Step 3: Stop the device and remove the coil until the number of coils meets the requirements of the winding. Step 4: Bend each non-heating section to form a single-phase coil winding, and each phase winding has only one connection terminal located on the inner side and one located on the outer side.

2. The winding process of the enameled wire on the cup-shaped winding according to claim 1, characterized in that: In the second step, the rotation speed of the winding device is 10 revolutions per minute - 18 revolutions per minute.

3. The winding process of the enameled wire on the cup-shaped winding according to claim 1, characterized in that: In the third step, after winding the specified number of turns, the turntable stops rotating, and the coil continues to be heated on the turntable for 20 seconds to 30 seconds, and then the coil is removed.

4. The winding process of the enameled wire on the cup-shaped winding according to claim 1, characterized in that: In the fourth step, the bending is a 90° upward bend.

5. The winding process of the enameled wire on the cup-shaped winding according to claim 1, characterized in that: The winding device includes a winding turntable, a rotating shaft, and a motor for driving the rotating shaft to rotate; the winding turntable includes a support disk fixedly sleeved outside the rotating shaft, and two oppositely arranged semi-circular turntables slidably connected to one side of the support disk, so that the distance between the two semi-circular turntables can be adjusted; the semi-circular turntable is provided with a heating area and a non-heating area at intervals along the outer periphery, so that the coil is circumferentially divided into a heating section and a non-heating section at intervals.

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