Miniature brushless motor winding shaping tool

Abstract

A miniature brushless motor winding shaping tool comprises a first core shaft, a second core shaft, a first pressing ring, a second pressing ring, a first pressing cover and a second pressing cover. The positioning sections of the first core shaft and the second core shaft are inserted into the two ends of the annular iron core respectively, the inner ends of the two positioning sections are connected together, the first pressing ring and the second pressing ring are arranged on the outer diameters of the two ends of the annular iron core in a sleeving mode through the guide holes respectively, the two shaping holes are formed in the periphery of the winding in a sleeving mode respectively, and the shaping sections are located in the inner circle of the winding. The first gland and the second gland are respectively inserted on the outer diameter of the shaping section and in the shaping hole through the annular boss, the end face of the annular boss is tightly attached to the end face of the winding, and a lead of the winding penetrates out of a wire passing hole formed in the second gland; the outer ends of the first gland and the second gland are axially and simultaneously extruded, so that the first gland and the second gland are tightly attached to the first pressing ring and the second pressing ring respectively, and winding shaping is achieved. The defects in the prior art are overcome.

Description

Technical Field

[0001] This invention belongs to the field of motor winding shaping technology, and particularly relates to a tooling for shaping the windings of a miniature brushless motor. Background Technology

[0002] A coil is the basic unit that makes up a winding. A winding is simply a coil arranged and connected according to a certain pattern. Coils can be classified as multi-turn coils and single-turn coils. Currently, coils are usually wound around the outside of an iron core. After winding, the finished winding is obtained. Miniature brushless motors are small in size and require high assembly precision. If the winding is uneven or irregular at both ends of the iron core, it will lead to assembly difficulties for the miniature brushless motor. Summary of the Invention

[0003] This invention provides a miniature brushless motor winding shaping fixture to overcome the shortcomings of the prior art.

[0004] The technical solution adopted in this invention is: a micro brushless motor winding shaping fixture, comprising a first mandrel, a second mandrel, a first pressure ring, a second pressure ring, a first pressure cap, and a second pressure cap; the first mandrel and the second mandrel each include a positioning section and a shaping section arranged coaxially; the central holes of the first pressure ring and the second pressure ring are each composed of a coaxial and through shaping hole and a guide hole; one end of the first pressure cap and the second pressure cap each has a coaxially arranged annular boss. The positioning sections of the first mandrel and the second mandrel are respectively inserted into the two ends of the toroidal iron core, and the inner ends of the two positioning sections are connected together, so that the shaping section is located in the inner ring of the winding, and the annular step surface connecting the shaping section and the positioning section abuts against the annular end face of the toroidal iron core. The first pressure ring and the second pressure ring are respectively fitted onto the outer diameter of both ends of the toroidal iron core through guide holes, and the two shaping holes are respectively fitted onto the outer periphery of the winding, with the annular stepped surface connecting the shaping hole and the guide hole abutting against the annular end face of the toroidal iron core. The first and second pressure caps are respectively inserted into the outer diameter of the shaping section and the shaping hole through annular bosses, and the end face of the annular bosses is in close contact with the end face of the winding, and the lead wires of the windings pass through the wire holes provided on the second pressure cap. The outer ends of the first and second pressure caps are simultaneously axially pressed, so that the first and second pressure caps are tightly attached to the first and second pressure rings respectively, thereby achieving the shaping of the winding.

[0005] The positioning section of the first mandrel is coaxially provided with a first threaded hole, and the end of the positioning section of the second mandrel is connected with a first screw. The first screw is threadedly connected to the first threaded hole to connect the inner ends of the positioning sections of the first mandrel and the second mandrel together.

[0006] The second spindle is coaxially provided with a stepped through hole at the end of the positioning section, and the first screw is inserted from the large end of the stepped through hole and protrudes from the small end.

[0007] The large end of the stepped through hole has an internal thread, and the shaping section of the first mandrel is coaxially provided with a second threaded hole. A second screw passes through the first pressure cap and is threaded to the internal thread. A third screw passes through the second pressure cap and is threaded to the second threaded hole, so that the first pressure cap and the first pressure ring, and the second pressure cap and the second pressure ring remain tightly attached after the pressure is released.

[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention extrudes and shapes both ends of the winding of a miniature brushless motor, ensuring that the axial and radial dimensions of both ends of the winding meet the design requirements and are uniform and regular, thus guaranteeing the normal assembly of the miniature brushless motor.

[0009] 2. This invention can maintain the shaped state even after the pressure is released, so that the stress of the winding coil can be fully released. It does not spring back after the tooling is removed, ensuring the size of the shaped winding and the shaped effect is good. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the present invention before extrusion; Figure 3 This is a schematic diagram of the first mandrel structure of the present invention; Figure 4 This is a schematic diagram of the second mandrel structure of the present invention; Figure 5 This is a schematic diagram of the first and second pressure rings of the present invention; Figure 6 This is a schematic diagram of the first pressure cap structure of the present invention; Figure 7 This is a schematic diagram of the second pressure cap structure of the present invention; Figure 8 This is a schematic diagram of the existing winding structure. Detailed Implementation

[0011] The following is in conjunction with the appendix Figure 1-8 The present invention will be described in detail below with reference to specific embodiments.

[0012] A miniature brushless motor winding shaping fixture includes a first mandrel 1, a second mandrel 2, a first pressure ring 3, a second pressure ring 4, a first pressure cap 5, and a second pressure cap 6. The first mandrel 1 and the second mandrel 2 each include a coaxially arranged positioning section 12 and a shaping section 13. The central holes of the first pressure ring 3 and the second pressure ring 4 are both composed of a coaxial and through shaping hole 14 and a guide hole 15. One end of the first pressure cap 5 and the second pressure cap 6 each has a coaxially arranged annular boss 16. The positioning sections 12 of the first mandrel 1 and the second mandrel 2 are respectively inserted into the two ends of the annular iron core 10, and the inner ends of the two positioning sections 12 are connected together, and the shaping section 13 is located in the inner ring of the winding 11, and the annular stepped surface connecting the shaping section 13 and the positioning section 12 abuts against the annular end face of the annular iron core 10. The first pressure ring 3 and the second pressure ring 4 are respectively fitted onto the outer diameters of both ends of the annular iron core 10 through the guide holes 15, and the two shaping holes 14 are respectively fitted onto the periphery of the winding 11, and the annular stepped surface connecting the shaping hole 14 and the guide hole 15 abuts against the annular end face of the annular iron core 10. The first pressure cap 5 and the second pressure cap 6 are respectively inserted into the outer diameter of the shaping section 13 and the shaping hole 14 through the annular boss 16, and the end face of the annular boss 16 is in close contact with the end face of the winding 11, and the lead wire of the winding 11 passes through the wire hole 6-1 provided on the second pressure cap 6. The outer ends of the first pressure plate 5 and the second pressure plate 6 are simultaneously pressed axially, so that the first pressure plate 5 and the second pressure plate 6 are tightly attached to the first pressure ring 3 and the second pressure ring 4 respectively, thereby shaping the winding 11.

[0013] In one embodiment, the positioning section 12 of the first mandrel 1 is coaxially provided with a first threaded hole 12-1, and the end of the positioning section 12 of the second mandrel 2 is connected with a first screw 7. The first screw 7 is threadedly connected to the first threaded hole 12-1 to connect the inner ends of the positioning sections 12 of the first mandrel 1 and the second mandrel 2 together.

[0014] In one embodiment, the second spindle 2 is coaxially provided with a stepped through hole 2-1 at the end of the positioning section 12, and the first screw 7 is inserted from the large end of the stepped through hole 2-1 and extends out from the small end.

[0015] In one embodiment, to prevent deformation of the shaped winding, the large end of the stepped through hole 2-1 has an internal thread 2-2, and the shaping section 13 of the first mandrel 1 is coaxially provided with a second threaded hole 13-1. The second screw 8 passes through the first pressure cap 5 and is threaded to the internal thread 2-2. The third screw 9 passes through the second pressure cap 6 and is threaded to the second threaded hole 13-1, so that the first pressure cap 5 and the first pressure ring 3, and the second pressure cap 6 and the second pressure ring 4 remain tightly attached after the pressure is released; so that the shaping stress of the shaped winding 11 is gradually eliminated, effectively preventing the springback of the shaped winding 11.

[0016] In use, the first mandrel 1 and the second mandrel 2 are inserted into the iron core from both ends of the winding, respectively. Then, the first mandrel 1 and the second mandrel 2 are connected by the first screw 7 to fix the first mandrel 1 and the second mandrel 2 to the winding. Then, the first pressure ring 3 and the second pressure ring 4 are respectively fitted onto both ends of the winding. Next, the second pressure cover 6 with a wire through hole 6-1 is installed on the end of the winding with the lead wire, and the lead wire is passed out through the wire through hole 6-1. Then, the first pressure cover 5 is installed on the other end of the winding. At this time, the outer end of the first pressure cover 5 of the tooling with the winding is placed on the press table. The press head presses the second pressure cover 6 to make the second pressure cover 6... The inner end face of the first pressure cap 5 is in close contact with the outer end faces of the first pressure ring 3 and the second pressure ring 4, thus completing the winding shaping. Then, the shaped tooling winding is removed from the press. To prevent the coil from springing back after shaping, the second screw 8 and the third screw 9 are then threaded through the through hole and the through hole and connected to the second threaded hole and the internal thread, respectively. This keeps the inner end face of the first pressure cap 5 in close contact with the outer end face of the first pressure ring 3 and the inner end face of the second pressure cap 6 in close contact with the outer end face of the second pressure ring 4. After maintaining the state after being squeezed by the press for 2 hours, the tooling is removed, allowing the coil stress to gradually disappear and be completely shaped, effectively preventing the winding 11 from springing back after leaving the press.

[0017] It should be noted that the position and number of the wire guide holes 6-1 correspond one-to-one with the leads of the winding to be shaped.

[0018] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent variations made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A miniature brushless motor winding shaping fixture, characterized in that: It includes a first mandrel (1), a second mandrel (2), a first pressure ring (3), a second pressure ring (4), a first pressure cap (5), and a second pressure cap (6); the first mandrel (1) and the second mandrel (2) each include a positioning section (12) and a shaping section (13) arranged coaxially; the center holes of the first pressure ring (3) and the second pressure ring (4) are both composed of a coaxial and through shaping hole (14) and a guide hole (15); one end of the first pressure cap (5) and the second pressure cap (6) each has a coaxially arranged annular boss (16). The positioning sections (12) of the first mandrel (1) and the second mandrel (2) are respectively inserted into the two ends of the annular iron core (10), and the inner ends of the two positioning sections (12) are connected together, and the shaping section (13) is located in the inner ring of the winding (11), and the annular step surface connecting the shaping section (13) and the positioning section (12) abuts against the annular end face of the annular iron core (10); The first pressure ring (3) and the second pressure ring (4) are respectively fitted onto the outer diameters of the two ends of the annular iron core (10) through the guide hole (15), and the two shaping holes (14) are respectively fitted onto the outer periphery of the winding (11), and the annular stepped surface connecting the shaping hole (14) and the guide hole (15) abuts against the annular end face of the annular iron core (10). The first pressure cap (5) and the second pressure cap (6) are respectively inserted into the outer diameter of the shaping section (13) and the shaping hole (14) through the annular boss (16), and the end face of the annular boss (16) is tightly attached to the end face of the winding (11), and the lead wire of the winding (11) passes through the wire hole (6-1) provided on the second pressure cap (6); The outer ends of the first pressure cap (5) and the second pressure cap (6) are simultaneously pressed axially, so that the first pressure cap (5) and the second pressure cap (6) are tightly attached to the first pressure ring (3) and the second pressure ring (4) respectively, thereby shaping the winding (11).

2. The miniature brushless motor winding shaping fixture according to claim 1, characterized in that: The first mandrel (1) has a first threaded hole (12-1) coaxially provided in the positioning section (12) of the first mandrel (1), and the end of the positioning section (12) of the second mandrel (2) is connected to a first screw (7). The first screw (7) is threadedly connected to the first threaded hole (12-1) to connect the inner ends of the positioning sections (12) of the first mandrel (1) and the second mandrel (2) together.

3. The miniature brushless motor winding shaping fixture according to claim 2, characterized in that: The second spindle (2) is coaxially provided with a stepped through hole (2-1) with the small end at the end of the positioning section (12). The first screw (7) is inserted from the large end of the stepped through hole (2-1) and the small end extends out.

4. The motor winding shaping fixture according to claim 3, characterized in that: The large end of the stepped through hole (2-1) has an internal thread (2-2). The shaping section (13) of the first mandrel (1) is coaxially provided with a second threaded hole (13-1). The second screw (8) passes through the first pressure cap (5) and is threaded to the internal thread (2-2). The third screw (9) passes through the second pressure cap (6) and is threaded to the second threaded hole (13-1), so that the first pressure cap (5) and the first pressure ring (3), and the second pressure cap (6) and the second pressure ring (4) remain tightly attached after the pressure is released.

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