Stepping motor and winding device

Abstract

The invention provides a stepping motor and a winding device, and the stepping motor comprises two clamping plates which are oppositely arranged, a rotating shaft of which the two ends are respectively supported on the two clamping plates, magnetic steel which sleeves and is fixed on the peripheral side of the rotating shaft, and a stator unit which sleeves the rotating shaft. The stator unit comprises a winding which is arranged at an interval with the magnetic steel; the winding comprises a hollow shell clamped between the two clamping plates, a claw pole fixed at one end of the shell and coaxially arranged, and a coil wound on the peripheral side of the claw pole, and wire ends at two ends of the coil respectively extend out of the shell; and insulating coatings are coated on the parts, in contact with the coil, of the claw poles and the shell. According to the stepping motor, the effective arrangement space of the stepping motor can be improved, and the torque of the stepping motor can be improved on the premise of the same size.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stepping motor and a winding device. Background Art

[0002] Stepper motors have been widely used in fields such as motors and generators due to their high working efficiency and energy saving and consumption reduction.

[0003] The stepper motor mainly includes a rotating shaft, a magnetic steel fixed on the outer peripheral side of the rotating shaft, and a winding sleeved on the rotating shaft; the winding mainly includes a shell sleeved on the rotating shaft and forming a rotational connection with the rotating shaft, a claw pole fixed to the shell and coaxially arranged, an insulating frame fixed to the outer peripheral side of the claw pole, and a coil fixed to the outer peripheral side of the frame.

[0004] In the related art, since the stepper motor needs to design an insulating frame between the claw pole and the coil, this reduces the effective layout space of the stepper motor and reduces its torque under the premise of the same volume.

[0005] Therefore, it is necessary to provide a new stepping motor and winding device to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a new stepper motor and winding device to solve the problem that the effective arrangement space of the stepper motor in the related art is reduced and its torque is reduced under the premise of the same volume.

[0007] In order to achieve the above-mentioned purpose, in a first aspect, the present invention provides a stepping motor, which comprises two clamping plates arranged opposite to each other, a rotating shaft whose two ends are respectively supported by the two clamping plates and are rotatably connected thereto, a magnetic steel sleeved and fixed on the outer peripheral side of the rotating shaft, and a stator unit sleeved on the rotating shaft, wherein the two clamping plates are respectively located at the two ends of the magnetic steel along the axial direction of the rotating shaft and are spaced apart from the magnetic steel; the stator unit comprises a winding spaced apart from the magnetic steel, and the winding is clamped and fixed between the two clamping plates; The winding includes a hollow shell sandwiched between the two clamping plates, a claw pole fixed to one end of the shell and coaxially arranged with the shell, and a coil wound around the outer circumference of the claw pole, and the two end wire ends of the coil extend outside the shell respectively; the part of the claw pole in contact with the coil and the shell are both coated with an insulating coating.

[0008] Preferably, the claw pole includes a ring-shaped fixing portion fixed to one end of the shell and a plurality of extension portions formed by the inner circumference of the fixing portion extending axially thereof, and the plurality of extension portions are arranged at intervals; the coil is wound and fixed on the outer circumference of the plurality of extension portions.

[0009] Preferably, the shell includes a hollow cylindrical portion, a first annular fixed portion extending inwardly from one end of the cylindrical portion away from the claw pole, and a plurality of first extension portions formed by the inner circumference of the first fixed portion extending along its axial direction, the plurality of first extension portions are arranged at intervals, and each first extension portion extends between two adjacent extension portions of the claw pole; the claw pole is fixed to one end of the cylindrical portion.

[0010] Preferably, the claw pole also includes a clamping portion formed by protruding and extending outward from the outer peripheral side of the fixing portion, and the clamping portion extends to the outside of the shell; the winding also includes a sheet-like frame, and the sheet-like frame includes a platform portion stacked and fixed on the side of the fixing portion close to the extending portion, a protrusion extending from the outer peripheral side of the platform portion and stacked and fixed on the clamping portion, and two winding poles formed by protruding and extending from the side of the protrusion away from the platform portion, and the two winding poles are arranged at intervals from each other; the two end wire ends of the coil are respectively wound around the two winding poles.

[0011] Preferably, a lead groove recessed inwardly is provided on a side of the protruding portion away from the fixing portion, and the lead groove extends from the inner circumference of the fixing portion to the winding post.

[0012] Preferably, the sheet-like frame further comprises a limiting snap-in formed by a protruding extension of one side of the protruding portion close to the clamping portion, the clamping portion is abutted and received in the limiting snap-in, and the limiting snap-in and the fixing portion are located in the same plane.

[0013] Preferably, the insulating coating applied on the claw pole covers the extension portion.

[0014] Preferably, the windings include a plurality of windings which are arranged in sequence along the axial direction of the rotating shaft; the two fixing portions of any two adjacent windings are pressed against each other and fixed by welding.

[0015] In the second aspect, the present invention provides a winding device, which is applied to the stepper motor as described above, comprising a hollow sleeve and a core shaft inserted in the sleeve, the core shaft comprising a first section, a second section and a third section which extend sequentially and have increasing outer diameters sequentially, the first section is used to sleeve the claw pole, the outer periphery of the second section is recessed to form an extension groove matching the extension portion of the claw pole, and the third section is used to sleeve the sleeve; when the claw pole is sleeved on the first section, each of the extension portions is respectively engaged in one of the extension grooves.

[0016] Compared with the related art, the stepper motor in the present invention is provided with an insulating coating on the part where the claw pole contacts the coil and the shell, so that the coil can be directly fixed to the claw pole, thereby freeing up the space occupied by the insulating frame to increase the effective layout space of the stepper motor; when the increased space is applied to the coil, the total number of turns of the coil can be increased under the premise of the same volume, so that the torque of the stepper motor can be improved; when the increased space is applied to the magnet, the outer diameter and magnetic properties of the magnet can be increased under the premise of the same volume, so that the torque of the stepper motor can be improved; that is, the stepper motor of the present invention can increase its effective layout space, and under the premise of the same volume, it can also increase its torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 A schematic diagram of the three-dimensional structure of a stepping motor provided in the first embodiment of the present invention; Figure 2 A partial structural exploded view of a stepping motor provided in Embodiment 1 of the present invention; Figure 3 for Figure 1 AA line section view; Figure 4 This is an exploded structural diagram of a housing and a sheet-like frame in a stepping motor provided in the first embodiment of the present invention; Figure 5 A schematic diagram of the structure of a winding device after winding is completed provided in Embodiment 2 of the present invention; Figure 6 for Figure 5 Schematic diagram of the structural decomposition.

[0018] Among them, 100, stepper motor; 1, clamping plate; 11, bearing; 2, rotating shaft; 3, magnet; 4, winding; 41, shell; 411, cylindrical part; 412, first fixed part; 413, first extending part; 42, claw pole; 421, fixed part; 422, extending part; 423, clamping part; 424, pressing part; 43, coil; 44, sheet skeleton; 441, platform part; 442, protruding part; 4421, lead groove; 443, winding column; 444, limit bayonet; 5, gasket.

[0019] 200, winding device; 201, sleeve; 202, core shaft; 2021, first section; 2022, second section; 20221, extension groove; 2023, third section. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1 The embodiment of the present invention provides a stepping motor 100, Figures 1 to 4 As shown, it includes two clamping plates 1 arranged opposite to each other, a rotating shaft whose two ends are respectively supported by the two clamping plates 1 and are rotatably connected therewith, a magnetic steel 3 sleeved and fixed on the outer peripheral side of the rotating shaft, and a stator unit sleeved on the rotating shaft, the two clamping plates 1 are respectively located at the two ends of the magnetic steel 3 along the axial direction of the rotating shaft and are spaced apart from the magnetic steel 3; the stator unit includes a winding 4 spaced apart from the magnetic steel 3, and the winding 4 is clamped and fixed between the two clamping plates 1.

[0022] Each clamping plate 1 is embedded and fixed with a bearing 11 , and each clamping plate 1 is sleeved and fixed to the rotating shaft through the bearing 11 and forms a rotation connection with the rotating shaft.

[0023] The windings 4 include a plurality of windings 4 which are arranged in sequence along the axial direction of the rotating shaft, and the plurality of windings 4 have the same structure. In this embodiment, the windings 4 include two windings 4 .

[0024] Specifically, the winding 4 includes a hollow shell 41 sandwiched between two clamping plates 1, a claw pole 42 fixed to one end of the shell 41 and coaxially arranged with the shell 41, and a coil 43 wound around the outer circumference of the claw pole 42, and the two end wire ends of the coil 43 extend to the outside of the shell 41 respectively; the contact part of the claw pole 42 and the coil 43 and the shell 41 are coated with an insulating coating.

[0025] The claw pole 42 includes a ring-shaped fixing portion 421 fixed to one end of the shell 41, a plurality of extension portions 422 formed by the inner peripheral edge of the fixing portion 421 extending along its axial direction, and a clamping portion 423 formed by protruding outward from the outer peripheral side of the fixing portion 421. The plurality of extension portions 422 are arranged at intervals, and the clamping portion 423 extends to the outside of the shell 41; the coil 43 is wound and fixed on the outer peripheral side of the plurality of extension portions 422.

[0026] The insulating coating applied on the claw pole 42 covers the extending portion 422 .

[0027] The claw pole 42 further includes a pressing portion 424 formed by extending outward from the outer peripheral side of the fixing portion 421, and the pressing portion 424 and the clamping portion 423 are respectively located on opposite sides of the fixing portion 421. This design can better limit the claw pole 42 through the pressing portion 424 to constrain its rotational freedom.

[0028] The coil 43 may be directly wound around the outer circumference of the extension portion 422 ; or the conductive wire may be prefabricated into the coil 43 matching the extension portion 422 , and then sleeved and fixed on the outer circumference of the extension portion 422 .

[0029] In this embodiment, the two fixing portions 421 of the two windings 4 abut against each other and are fixed by welding, which can improve the fixing strength of the claw poles 42 .

[0030] The shell 41 includes a hollow cylindrical portion 411, a first annular fixing portion 412 extending inward from one end of the cylindrical portion 411 away from the claw pole 42, and a plurality of first extending portions 413 extending along the axial direction of the inner circumference of the first fixing portion 412. The plurality of first extending portions 413 are arranged at intervals, and each first extending portion 413 extends between two adjacent extending portions 422 of the claw pole 42; the fixing portion 421 of the claw pole 42 is fixed to one end of the cylindrical portion 411.

[0031] Specifically, the winding 4 further includes a sheet-like frame 44, which includes a platform portion 441 stacked and fixed on the side of the fixed portion 421 close to the extension portion 422, a protrusion 442 protruding from the outer peripheral side of the platform portion 441 and stacked and fixed on the clamping portion 423, and two winding posts 443 protruding from the side of the protrusion 442 away from the platform portion 441, and the two winding posts 443 are arranged at intervals; the two ends of the coil 43 are respectively wound on the two winding posts 443. This design can facilitate the fixing of the two ends of the coil 43.

[0032] A side of the protruding portion 442 away from the fixing portion 421 is provided with an inwardly recessed lead groove 4421, and the lead groove 4421 extends from the inner circumference of the fixing portion 421 to the winding post 443. This design can make way for one of the wire ends of the coil 43.

[0033] The sheet-like frame 44 also includes a position-limiting bayonet 444 formed by a protruding extension of the protruding portion 442 near the clamping portion 423. The clamping portion 423 is received in the position-limiting bayonet 444, and the position-limiting bayonet 444 and the fixing portion 421 are located in the same plane. This design can achieve assembly positioning through the cooperation between the position-limiting bayonet 444 and the clamping portion 423, and restrict the freedom of rotation of the claw pole 42.

[0034] Specifically, the stepper motor 100 further includes two gaskets 5 which are sleeved and fixed on the rotating shaft and spaced apart from each other, and the two gaskets 5 are respectively abutted against two ends of the magnetic steel 3 .

[0035] Compared with the related art, the stepper motor 100 in this embodiment provides an insulating coating on the contact portion between the claw pole 42 and the coil 43 and the housing 41, so that the coil 43 can be directly fixed to the claw pole 42, thereby freeing up the space occupied by the insulating frame to increase the effective layout space of the stepper motor 100; when the increased space is applied to the coil 43, the total number of turns of the coil 43 can be increased under the premise of the same volume, so that the torque of the stepper motor 100 is improved; when the increased space is applied to the magnet 3, the outer diameter and magnetic properties of the magnet 3 can be increased under the premise of the same volume, so that the torque of the stepper motor 100 is improved; that is, the stepper motor 100 of the present invention can increase its effective layout space, and under the premise of the same volume, it can also increase its torque.

[0036] Embodiment 2 The embodiment of the present invention provides a winding device 200, which is applied to the stepping motor 100 in the above embodiment 1, and is combined with Figures 5 and 6 As shown, it includes a hollow sleeve 201 and a core shaft 202 inserted in the sleeve 201. The core shaft 202 includes a first section 2021, a second section 2022 and a third section 2023 which extend sequentially and have increasing outer diameters. The first section 2021 is used to sleeve the claw pole 42. The outer periphery of the second section 2022 is recessed to form an extension groove 20221 matching the extension portion 422 of the claw pole 42. The third section 2023 is used to sleeve the sleeve 201. When the claw pole 42 is sleeved on the first section 2021, each extension portion 422 is respectively engaged in an extension groove 20221.

[0037] The winding device 200 is mainly used to wind the coil 43 in the first embodiment around the extension portion 422 of the claw pole 42. When in use, the fixed portion 421 of the claw pole 42 is sleeved on the core shaft 202, and the extension portion 422 is close to the sleeve 201. Then, one end of the coil 43 is wound and fixed on one of the winding posts 443, and then the coil 43 is wound around the outside of the extension portion 422 in sequence. After the winding of the coil 43 is completed, the other end of the coil is wound and fixed on another winding post 443, and then the core shaft 202 is pulled out from the fixed portion 421 of the claw pole 42, and the sleeve 201 is pressed against the coil 43 to prevent the coil 43 from being pulled out. When the core shaft 202 is pulled out of the sleeve 201, the sleeve 201 is removed to complete the winding of the coil 43.

[0038] The number of the extension slots 20221 is the same as the number of the extension portions 422 and the structures match, the main purpose is to avoid collapse or bending when the coil 43 is wound. Of course, according to actual needs, multiple extension portions 422 form at least a partially closed state or a fully closed state with multiple extension portions 422 respectively.

[0039] The winding device 200 in this embodiment can stably and quickly wind the coil 43 around the extension portion 422 of the claw pole 42 , thereby avoiding the situation where the winding of the coil 43 is unstable and slow.

[0040] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A stepper motor, comprising two clamping plates arranged opposite to each other, a rotating shaft whose two ends are respectively supported by the two clamping plates and are rotatably connected thereto, a magnetic steel sleeved and fixed on the outer peripheral side of the rotating shaft, and a stator unit sleeved on the rotating shaft, wherein the two clamping plates are respectively located at the two ends of the magnetic steel along the axial direction of the rotating shaft and are spaced apart from the magnetic steel; the stator unit comprises a winding spaced apart from the magnetic steel, and the winding is clamped and fixed between the two clamping plates; characterized in that: The winding includes a hollow shell sandwiched between the two clamping plates, a claw pole fixed to one end of the shell and coaxially arranged with the shell, and a coil wound around the outer circumference of the claw pole, and the two end wire ends of the coil extend outside the shell respectively; the part of the claw pole in contact with the coil and the shell are both coated with an insulating coating.

2. The stepper motor according to claim 1, characterized in that: The claw pole includes an annular fixing portion fixed to one end of the shell and a plurality of extension portions formed by the inner periphery of the fixing portion extending along its axial direction, wherein the plurality of extension portions are arranged at intervals; and the coil is wound and fixed on the outer periphery of the plurality of extension portions.

3. The stepper motor according to claim 2, characterized in that: The shell includes a hollow cylindrical portion, a first annular fixing portion extending inward from one end of the cylindrical portion away from the claw pole, and a plurality of first extending portions formed by the inner circumference of the first fixing portion extending along its axial direction, wherein the plurality of first extending portions are arranged at intervals, and each of the first extending portions extends between two adjacent extension portions of the claw pole; the claw pole is fixed to one end of the cylindrical portion.

4. The stepping motor according to claim 2, characterized in that: The claw pole also includes a clamping portion formed by protruding and extending outward from the outer peripheral side of the fixing portion, and the clamping portion extends to the outside of the shell; the winding also includes a sheet-like frame, and the sheet-like frame includes a platform portion stacked and fixed on the side of the fixing portion close to the extending portion, a protruding portion protruding and extending from the outer peripheral side of the platform portion and stacked and fixed on the clamping portion, and two winding poles formed by protruding and extending from the side of the protruding portion away from the platform portion, and the two winding poles are arranged at intervals from each other; the two ends of the coil are respectively wound around the two winding poles.

5. The stepping motor according to claim 4, characterized in that: A wire guide groove recessed inwards is provided on one side of the protruding portion away from the fixing portion, and the wire guide groove extends from the inner peripheral side of the fixing portion to the winding post.

6. The stepping motor according to claim 4, characterized in that: The sheet-like frame also includes a limit snap-in formed by a protruding extension of the protruding portion on one side close to the clamping portion, the clamping portion is abutted and received in the limit snap-in, and the limit snap-in and the fixing portion are located in the same plane.

7. The stepper motor according to claim 2, characterized in that: The insulating coating coated on the claw pole covers the extension portion.

8. The stepper motor according to claim 1, characterized in that: The windings include a plurality of windings which are arranged in sequence along the axial direction of the rotating shaft; the two fixing parts of any two adjacent windings are pressed against each other and fixed by welding.

9. A winding device, applied to the stepping motor as claimed in claim 2, characterized in that: The winding device includes a hollow sleeve and a core shaft inserted in the sleeve, the core shaft includes a first section, a second section and a third section which extend sequentially and have increasing outer diameters, the first section is used to sleeve the claw pole, the outer periphery of the second section is recessed to form an extension groove matching the extension portion of the claw pole, and the third section is used to sleeve the sleeve; when the claw pole is sleeved on the first section, each of the extension portions is respectively engaged in one of the extension grooves.

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