Insulation injection molding support frame for winding end of motor

Abstract

The utility model discloses a motor winding end insulation injection molding supporting frame, and relates to the field of motor rotors, the motor winding end insulation injection molding supporting frame comprises a driving shaft, an iron core is fixedly connected to the outer surface of the driving shaft, and an auxiliary assembly used for being matched with iron cores with different widths is arranged outside the iron core. The adaptive copper wire diameter range is wider, a mold does not need to be independently designed for each specification, the equipment switching cost is reduced, the width of the first coil base is rapidly adjusted through the design of a reset spring and a limiting block, the isolation strip is inserted between coil layers, physical limiting is achieved, and coil deformation caused by winding tension release is reduced; especially, wires are prevented from being thrown out in a high-rotating-speed motor, the second coil base can be further limited by inserting the isolating bar and the auxiliary plate at the same time, and the second coil base and the first coil base are prevented from moving.

Description

Technical Field

[0001] This application relates to the field of motor rotors, and more particularly to an insulated injection-molded support frame for motor winding ends. Background Technology

[0002] The injection-molded insulated support frame for motor winding ends is a key component of the motor. During the winding process of the motor stator or rotor, the injection-molded support frame is used to fix the coil position, isolate the conductor from the iron core (insulation), and help dissipate heat.

[0003] Different wire diameters (such as thick wire for high current and thin wire for high number of turns) require different slot widths. Iron cores are designed with different width types to match the winding requirements. Existing injection molding wire frames are difficult to adapt to iron cores of different widths due to their fixed structure, resulting in frequent mold changes, low production efficiency, and the coils are prone to loosening and displacement due to tension changes or vibration after winding, which affects the rotor's electrical performance. Utility Model Content

[0004] To address the issues of mismatched wire frame width and loose coils, this application provides an insulated injection-molded support frame for the motor winding end.

[0005] The technical solution for the motor winding end insulating injection-molded support frame provided in this application is as follows:

[0006] An insulated injection-molded support frame for motor winding ends includes a drive shaft, an iron core is fixedly connected to the outer surface of the drive shaft, and auxiliary components for adapting to iron cores of different widths are provided on the outside of the iron core.

[0007] By adopting the above technical solution, the width can be adjusted through auxiliary components, making it compatible with iron cores of different specifications, reducing mold development costs, and further fixing the coil after winding.

[0008] Preferably, the auxiliary component includes an isolation cylinder sleeved on the surface of the iron core, a coil seat one sleeved on the surface of the iron core is fixedly connected to the outer surface of the isolation cylinder, and a coil seat two sliding on the surface of the iron core is slidably connected to the inner side of the coil seat one.

[0009] By adopting the above technical solutions, the isolation cylinder, coil holder one, and coil holder two can ensure that the coil is insulated from the iron core and avoid short circuits.

[0010] Preferably, an isolation strip is inserted inside the iron core, and auxiliary plates are respectively provided at both ends of the isolation strip.

[0011] By adopting the above technical solution, the isolation strip is used to seal the opening of the iron core and prevent the copper wire from spreading out of the opening.

[0012] Preferably, both sides of the coil base two away from the coil base one are movably connected to isolation plates, and a square groove is formed on the surface of the isolation plate near the coil base two.

[0013] By adopting the above technical solution, the isolation plate is used to isolate the coil from the iron core and prevent the coil from directly contacting the inside of the iron core.

[0014] Preferably, the coil seat two has symmetrically fixedly connected protrusions on one side of the surface near the square groove one. A cylinder that is rotatably connected to the inside of the protrusion is fixedly connected through the protrusion. A torsion spring is sleeved on the surface of the cylinder between the two protrusions. One end of the torsion spring abuts against the inside of the two protrusions respectively, and the other end of the torsion spring is fixedly connected to the inner side of the isolation plate.

[0015] By adopting the above technical solution, the torsion spring automatically adjusts the angle of the isolation plate to adapt to different wire diameters.

[0016] Preferably, the inner side of the second coil holder is symmetrically provided with linearly distributed arc grooves, and the first coil holder is provided with square grooves on both sides of one end inside the second coil holder.

[0017] By adopting the above technical solution, the limiting block is inserted into the arc groove to achieve multi-position fixation.

[0018] Preferably, a limiting block adapted to the size of the square groove is slidably connected inside the square groove. A return spring is fixedly connected between one end of the limiting block inside the square groove and the inner wall of the square groove. The end of the limiting block away from the return spring is located inside the arc groove, and the size of the arc groove is adapted to the size of the limiting block.

[0019] By adopting the above technical solution, the reset spring requires external force to be overcome in order to unlock, thus avoiding accidental slippage during operation.

[0020] Preferably, the surface of the iron core is provided with a winding section, and the isolation cylinder and the coil seat are both located inside the winding section.

[0021] By adopting the above technical solution, the winding section is used to place the isolation cylinder and coil base one, and integrates insulation and support functions.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By utilizing the fact that coil holder one slides inside coil holder two, the width of the wire frame can be adjusted, which can accommodate a wider range of copper wire diameters. There is no need to design molds for each specification, reducing equipment switching costs. Furthermore, the design of the reset spring and limit block allows coil holder one to support rapid width adjustment.

[0024] 2. By inserting an isolation strip between the coil layers, physical restraint is achieved to reduce coil deformation caused by the release of winding tension, especially in high-speed motors to prevent the wires from flying out. The simultaneous insertion of the isolation strip and the auxiliary plate can further restrict the second coil holder and prevent the second coil holder from moving with the first coil holder. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this application;

[0026] Figure 2 This is an anatomical diagram of the auxiliary plate and isolation strip of this application;

[0027] Figure 3 This is a disassembled diagram of the auxiliary components of this application;

[0028] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0029] Figure 5 This is a cross-sectional view of the overall structure of this application;

[0030] Figure 6 for Figure 5 Enlarged structural diagram at point B.

[0031] Reference numerals: 1. Drive shaft; 2. Iron core;

[0032] 3. Auxiliary components; 31. Isolation cylinder; 32. Coil holder one; 33. Coil holder two; 34. Isolation plate; 35. Square slot one; 36. Cylinder; 37. Torsion spring; 38. Arc groove; 39. Square slot two; 310. Limiting block; 311. Return spring; 312. Auxiliary plate; 313. Isolation strip; 314. Protrusion; 4. Winding section. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0034] This application discloses an insulating injection-molded support frame for the winding end of a motor.

[0035] Reference Figure 1 , Figure 2An injection-molded support frame for insulating the winding end of a motor includes a drive shaft 1. The middle of the outer surface of the drive shaft 1 is fixed to the inner wall of the iron core 2. An auxiliary component 3 is provided on the outside of the iron core 2. The auxiliary component 3 is used to adapt to iron cores 2 of different widths. The iron core 2 is made of stacked iron sheets and has uniformly distributed grooves on its outside. A winding part 4 is provided between each groove. The winding part 4 is used to place the isolation cylinder 31 and the coil seat 32. An isolation strip 313 is inserted into the groove opening of the iron core 2. An auxiliary plate 312 is provided at both ends of the isolation strip 313. Specifically, the top end of the isolation strip 313 is fixedly connected to one of the auxiliary plates 312, and the bottom end of the isolation strip 313 is detachably installed to the other auxiliary plate 312. This makes it more convenient to install the isolation strip 313.

[0036] Before winding, the drive shaft 1, isolation cylinder 31, coil seat 1 32 and coil seat 2 33 need to be installed, and the width is adjusted by auxiliary component 3. After winding, the isolation strip 313 and the auxiliary plate 312 fixed to the isolation strip 313 are inserted into the groove and the opening of the iron core 2. Then, the installer fixes the bottom auxiliary plate 312 to the isolation strip 313. The two auxiliary plates 312 are located at both ends of the isolation plate 34 and abut against the isolation plate 34 to prevent the isolation plate 34 from moving.

[0037] Reference Figure 3 , Figure 4 The auxiliary component 3 includes an isolation cylinder 31 fitted onto the surface of the iron core 2. At least five coil seats 32 are fixedly connected in a circumferential array on the outer surface of the isolation cylinder 31. The coil seats 32 are evenly fitted onto the winding portions 4 between grooves. The inner side of the coil seats 32 is slidably connected to the outer surface of the coil seats 33, and the inner wall of the coil seats 33 is slidably connected to the surface of the iron core 2. This allows the width of different winding portions 4 to be adapted by sliding the coil seats 33. Two isolation plates 34 are movably connected to both sides of the coil seats 33, located at the end of the coil seats 33 away from the coil seats 32. A square groove 35 is formed on one side of the middle of the surface of each isolation plate 34. The square groove 35 is located within the isolation plate. One end of plate 34 is close to coil base 33. The surface of coil base 33 located in square groove 35 is fixedly connected to two protrusions 314. The two protrusions 314 are symmetrically arranged. The interior of the two protrusions 314 is fixedly connected to cylinder 36. The two ends of cylinder 36 pass through the two protrusions 314 and the interior of isolation plate 34 respectively. The two ends of cylinder 36 are rotatably connected to the interior of isolation plate 34. A torsion spring 37 is sleeved on the surface of cylinder 36 between the two protrusions 314. The end of torsion spring 37 close to the protrusions 314 abuts against the interior of the two isolation plates 34 respectively. The end of torsion spring 37 close to the isolation plate 34 is fixedly connected to the inner side of isolation plate 34. In this way, the angle of isolation plate 34 can be automatically adjusted to adapt to different wire diameters.

[0038] The bottoms of the isolation cylinder 31, coil seat 1 32, and coil seat 2 33 are all detachable. By first inserting the isolation cylinder 31, coil seat 1 32, and coil seat 2 33 into the groove and winding part 4 of the iron core 2, and then installing the bottoms of the isolation cylinder 31, coil seat 1 32, and coil seat 2 33, it is convenient to install the coil frame. The coil seat 2 33 and coil seat 1 32 can also be easily replaced if damaged. When adjusting the coil seat 2 33 to adapt to iron core 2 of different widths, the coil seat 2 33 drives the isolation plate 34 to move. The elastic force of the torsion spring 37 keeps the isolation plate 34 in contact with the surface of the iron core 2, effectively isolating the coil from the iron core 2.

[0039] Reference Figure 5 , Figure 6 The inner wall of coil base 2 33 has arc grooves 38 on both sides. The arc grooves 38 are arranged symmetrically and linearly on the inner side. The two sides of coil base 1 32 have square grooves 39. The square grooves 39 are located at the end of coil base 1 32 inside coil base 2 33 and are located near the surface of the arc grooves 38. The inner wall of the square grooves 39 slides without gaps with the outer wall of the limiting block 310 to prevent the limiting block 310 from moving inside the square grooves 39 when coil base 1 32 moves. A return spring 311 is fixedly connected to the side of the limiting block 310 inside the square grooves 39. The end of the return spring 311 away from the limiting block 310 is fixedly connected to the inner wall of the square grooves 39. The end of the limiting block 310 away from the return spring 311 is located inside the arc grooves 38, and the size of the limiting block 310 inside the arc grooves 38 is adapted to the size of the inner wall of the arc grooves 38.

[0040] When adjusting the dimensions of coil seat 1 32 and coil seat 2 33, the installer moves coil seat 2 33. The force of moving coil seat 2 33 is greater than the elastic force of the return spring 311. As a result, the movement of coil seat 2 33 causes the limiting block 310 to compress the return spring 311. The limiting block 310 moves inside the arc groove 38. When the limiting block 310 moves to different positions in the arc groove 38, the width of coil seat 1 32 and coil seat 2 33 changes, thereby adapting to the groove width of different iron cores 2. The elastic force of the return spring 311 is greater than the elastic force of the torsion spring 37. The elastic force of the torsion spring 37 does not affect the width of coil seat 1 32 and coil seat 2 33.

[0041] Among them, the torsion spring 37 and the return spring 311 are both made of beryllium copper. Beryllium copper is non-magnetic and achieves high strength through precipitation hardening. When used on the iron core 2, it does not affect the magnetic field distribution of the motor. In the auxiliary component 3, except for the torsion spring 37 and the return spring 311, all are made of non-conductive plastic material to isolate the conductor from the iron core 2. The isolation plate 34 is made of hard plastic and will not bend.

[0042] It should be noted that the calculation formula for the return spring 311 is: F = kx, where F is the external force on the spring, in N, k is the spring constant, in N / m, and x is the deformation of the spring, in m. The elastic force of the alloy spring is then calculated so that it can be used in this device.

[0043] The elastic effect of a torsion spring 37 is primarily expressed by its torque, and its calculation formula is usually based on the spring's stiffness (elastic coefficient). The basic formula is: M = K·θ; where: M is the torque generated by the torsion spring 37 upon recovery (the unit is usually N·m or lb·ft); θ is the torsion angle (in radians); K is the stiffness of the torsion spring 37, representing the restoring torque generated per unit angle. For a standard circular cross-section torsion spring 37, the formula for calculating the stiffness K is: K = (G·d 4 ) / (10.8·D·n); where: G is the shear modulus of the material (the unit is usually N / m). 2 (or psi); d is the diameter of the 37 torsion spring wire; D is the average diameter of the 37 torsion spring; n is the effective number of coils; the constant 10.8 is an empirical coefficient used to correct the mechanical distribution in actual use (this value may vary slightly under different designs and standards).

[0044] The implementation principle of the motor winding end insulation injection molding support frame in this application embodiment is as follows: Before winding, the drive shaft 1, isolation cylinder 31, coil seat 1 32 and coil seat 2 33 need to be installed. Then, the installation personnel move the coil seat 2 33. The movement of the coil seat 2 33 compresses the return spring 311, causing the limiting block 310 to enter the interior of the square groove 2 39, thereby driving the limiting block 310 to slide inside different arc grooves 38. The movement of the limiting block 310 inside the arc groove 38 can change the width of the coil seat 2 33 and the coil seat 1 32, thereby realizing the width adjustment of the wire frame, adapting to a wider range of copper wire diameters, eliminating the need to design molds separately for each specification, reducing equipment switching costs. The design of the return spring 311 and the limiting block 310 allows the coil seat 1 32 to support rapid width adjustment. The movement of the coil seat 2 33 causes the isolation plate 34 to move. The use of the torsion spring 37 keeps the isolation plate 34 in close contact with the inner side of the iron core 2, preventing gaps from forming between the isolation plate 34 and the iron core 2.

[0045] After adjustment, the coil is wound on the surfaces of coil seat 1 32 and coil seat 2 33. After winding, the isolation strip 313 and the auxiliary plate 312 fixed to the isolation strip 313 are inserted into the groove and the opening of the iron core 2 to achieve physical limitation and reduce coil deformation caused by the release of winding tension, especially in high-speed motors to prevent the wire from flying out. Then, the installation personnel fix the bottom auxiliary plate 312 and the isolation strip 313. The auxiliary plate 312 can further limit coil seat 2 33 and prevent coil seat 2 33 from moving with coil seat 1 32.

[0046] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A motor winding end insulating injection molded support frame, characterized in that: The device includes a drive shaft (1), on the outer surface of which an iron core (2) is fixedly connected. An auxiliary component (3) for adapting to iron cores (2) of different widths is provided on the outside of the iron core (2). The auxiliary component (3) includes an isolation cylinder (31) sleeved on the surface of the iron core (2). A coil seat one (32) sleeved on the surface of the iron core (2) is fixedly connected to the outer surface of the isolation cylinder (31). A coil seat two (33) that slides on the surface of the iron core (2) is slidably connected to the inner side of the coil seat one (32).

2. The motor winding end insulating injection molded support frame according to claim 1, characterized in that: An isolation strip (313) is inserted inside the iron core (2), and auxiliary plates (312) are respectively provided at both ends of the isolation strip (313).

3. The motor winding end insulating injection molded support frame according to claim 1, characterized in that: The two sides of the coil base two (33) away from the coil base one (32) are movably connected to the isolation plates (34), and the surface of the isolation plate (34) near the coil base two (33) is provided with a square groove (35).

4. The motor winding end insulating injection molded support frame according to claim 3, characterized in that: The coil seat 2 (33) is symmetrically fixedly connected to a protrusion (314) on one side of the surface near the square groove 1 (35). The inside of the protrusion (314) is fixedly connected to a cylinder (36) that is rotatably connected to the inside of the isolation plate (34). A torsion spring (37) is sleeved on the surface of the cylinder (36) between the two protrusions (314). One end of the torsion spring (37) abuts against the inside of the two protrusions (314), and the other end of the torsion spring (37) is fixedly connected to the inside of the isolation plate (34).

5. The motor winding end insulating injection molded support frame according to claim 1, characterized in that: The inner side of the coil seat 2 (33) is symmetrically provided with linearly distributed arc grooves (38), and the coil seat 1 (32) is provided with square grooves 2 (39) on both sides of one end inside the coil seat 2 (33).

6. The motor winding end insulating injection molded support frame according to claim 5, characterized in that: The inside of the square groove 2 (39) is slidably connected to a limiting block (310) that is adapted to the size of the square groove 2 (39). One end of the limiting block (310) inside the square groove 2 (39) is fixedly connected to a return spring (311) between it and the inner wall of the square groove 2 (39). The end of the limiting block (310) away from the return spring (311) is located inside the arc groove (38), and the size of the arc groove (38) is adapted to the size of the limiting block (310).

7. The motor winding end insulating injection molded support frame according to claim 1, characterized in that: The surface of the iron core (2) is provided with a winding part (4), and the isolation cylinder (31) and the coil seat (32) are both located inside the winding part (4).

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