CN111614026A

CN111614026A - Stepping motor

Info

Publication number: CN111614026A
Application number: CN202010490942.8A
Authority: CN
Inventors: 张强; 陈为博; 赵彬; 陈敏敏
Original assignee: Ruisheng Communication Technology Changzhou Co Ltd
Current assignee: AAC Communication Technologies Changzhou Co Ltd; Ruisheng Communication Technology Changzhou Co Ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-09-01
Also published as: WO2021243738A1

Abstract

The invention provides a stepping motor which comprises a rotor and a plurality of stators surrounding the rotor, wherein cylindrical voice coils wound on coils outside the voice coils and far away from the rotor are arranged in the stators. The voice coil comprises a cylindrical main body, and two end parts are oppositely arranged on the cylindrical main body along the axial direction; and a winding post provided at one of the ends; the coil comprises a coil body wound on the cylindrical body and a wiring end wound on the wiring column, the coil comprises a conductive core and an insulating layer sleeved outside the conductive core, and the insulating layer of the wiring end is removed by laser irradiation. Through the mode, the temperature-resistant grade of the insulating layer of the coil can be improved, the temperature-resistant grade of the whole voice coil is higher, and reliability tests such as locked rotor and the like are improved, so that the performance of the motor is improved. Meanwhile, the damage of the winding post caused by the traditional process is avoided, and the processing efficiency is improved.

Description

Stepping motor

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of motors, in particular to a stepping motor.

[ background of the invention ]

The stepping motor has compact structure, high power density, high working efficiency and obvious energy-saving and consumption-reducing benefits, and is widely applied to the fields of motors, generators and the like. In recent years, the demand of the industrial field for equipment which directly drives a load to work by using a stepping motor is more and more urgent, and the wide application of the stepping motor direct-drive equipment can generate immeasurable energy-saving benefit.

Miniature step motor and retarder connection provide input torque for the reduction gear, are reduction gear module driving source, and the signal of telecommunication realizes the input of signal of telecommunication through the coil connection with the motor, but because the coil is the enameled wire, the outmost insulating layer that is, need get rid of this insulating layer, just can switch on. The traditional method in the industry is to immerse a winding post containing wires in a tin furnace or a mode similar to silk-screen printing, immerse tin on the winding post containing wires, and remove an insulating layer by using high-temperature liquid tin. The stepping motor manufactured by the existing processing method has various defects: 1. if the enameled wire is to be completely removed, the temperature resistance grade of the enameled wire is low (if the insulating layer cannot be removed), so that the temperature resistance grade of the whole voice coil is reduced, and the voice coil is burnt out during a motor stalling test; 2. the high-temperature liquid tin can soften the winding post, so that the winding post is scalded, deformed and the like; 3. the processing efficiency is low, and the batch production and preparation are not facilitated.

Therefore, it is necessary to provide a new stepping motor to improve the above problems.

[ summary of the invention ]

The present invention is directed to a stepping motor, in which a coil insulating layer on a winding post around which a voice coil is wound is removed by laser irradiation to solve the above-mentioned disadvantages.

The technical scheme of the invention is as follows: a stepper motor, the stepper motor comprising: the stator comprises a rotor and a plurality of stators arranged around the rotor;

the rotor comprises a rotating shaft, magnetic steel sleeved outside the rotating shaft and rotor magnetic poles annularly arranged on the outer surface of the magnetic steel, wherein the rotor magnetic poles comprise a first magnetic strip and a second magnetic strip which have opposite magnetic poles and are annularly surrounded in a staggered manner;

the stators are axially stacked along the rotating shaft and are sleeved outside the rotor at intervals, and each stator comprises a cylindrical voice coil, a stator magnetic pole and a coil, wherein the stator magnetic pole is arranged at the inner side of the voice coil close to the rotor and corresponds to the rotor magnetic pole, and the coil is wound at the outer side of the voice coil away from the rotor;

the voice coil comprises a cylindrical main body, and two end parts are oppositely arranged on the cylindrical main body along the axial direction; and a winding post provided at one of the ends;

the coil comprises a coil body wound on the cylindrical body and a wiring end wound on the wiring column, the coil comprises a conductive core and an insulating layer sleeved outside the conductive core, and the insulating layer of the wiring end is removed by laser irradiation.

Preferably, the voice coil further includes a limit stop extending from an edge of the end portion in a direction radially away from the rotation axis.

Preferably, the voice coil further includes a boss extending from the edge of one of the limiting tables in the direction of the rotating shaft along the radial direction, the boss is plate-shaped, one end of the boss, which is far away from the limiting table, extends out of two winding posts along the direction of the rotating shaft along the radial direction, and the two winding posts are arranged at intervals.

Preferably, the winding post is cylindrical and extends from the boss to a direction away from the rotating shaft.

Preferably, the motor further comprises a circuit board provided with an interface, and the winding post penetrates through the interface so that the wiring terminal is connected with the circuit board.

Preferably, the stator magnetic pole includes two claw poles which are matched into a cylindrical shape and have opposite magnetic poles, the claw pole includes an annular portion and a plurality of claw-shaped magnetic poles which are arranged at intervals in the annular portion, and the claw-shaped magnetic pole of one claw pole is matched with the claw-shaped magnetic pole of the other claw pole at intervals.

Preferably, the motor further includes a casing wall surrounding the voice coil, the casing wall is in a cylindrical structure, and one end of the casing wall is connected to the annular portion of the claw pole.

Preferably, the motor further includes covers disposed at two ends of the casing wall, an accommodating space for accommodating the rotor and the plurality of stators is formed between the casing wall and the covers, the covers include a cover body and a bearing disposed in the cover body, the covers are annular, the bearing is disposed on the inner ring, and the rotating shaft is disposed on the bearing.

Preferably, the rotor is further provided with two annular gaskets sleeved on the rotating shaft, and the two annular gaskets are respectively arranged at two ends of the magnetic steel and between the two bearings.

Preferably, the magnetic steel is columnar, and the first magnetic stripe and the second magnetic stripe are strip-shaped and respectively extend along the axial direction of the rotating shaft on the outer surface of the magnetic steel.

The invention has the beneficial effects that: the utility model provides a stepping motor, include the rotor and encircle a plurality of stators that the rotor set up, set up in the stator and be the voice coil loudspeaker voice coil winding that the tube-shape is in deviating from the rotor the coil in the voice coil loudspeaker voice coil outside. The voice coil comprises a cylindrical main body, and two end parts are oppositely arranged on the cylindrical main body along the axial direction; and a winding post provided at one of the ends; the coil comprises a coil body wound on the cylindrical body and a wiring end wound on the wiring column, the coil comprises a conductive core and an insulating layer sleeved outside the conductive core, and the insulating layer of the wiring end is removed by laser irradiation. Through the mode, the temperature-resistant grade of the insulating layer of the coil can be improved, the temperature-resistant grade of the whole voice coil is higher, and reliability tests such as locked rotor and the like are improved, so that the performance of the motor is improved. Meanwhile, the damage of the winding post caused by the traditional process is avoided, and the processing efficiency is improved.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a motor provided in an embodiment of the present invention;

fig. 2 is an exploded schematic view of a motor structure provided by an embodiment of the invention;

FIG. 3 is a schematic diagram of a detailed structure of the voice coil and the coil of FIG. 2 in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the structure of a voice coil and coil combination in an embodiment of the invention;

fig. 5 is a schematic view of the voice coil and coil assembly of fig. 4 viewed axially in accordance with an embodiment of the present invention.

Reference numerals: a motor 100; a rotor 1; a rotating shaft 11; magnetic steel 12; a rotor magnetic pole 13; a first magnetic stripe 131; a second magnetic stripe 132; a gasket 14; a stator 2; a voice coil 21; a cylindrical main body 211; an end portion 212; a winding post 213; a stop block 214; a boss 215; a coil 22; a coil main body 221; a terminal 222; a first claw pole 231; a first annular portion 2311; a first claw pole 2312; a first space 2313; a second claw pole 232; the second annular portion 2321; a second claw pole 2322; a second spacing 2323; a housing 3; a shell wall 33; a cover 31; a bearing 32; a circuit board 4; an interface 41.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and embodiments.

It should be noted that the terms "first", "second" and "third" etc. in the description and claims of the present invention and the above-mentioned drawings are used for distinguishing different objects and are not used for describing a specific order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

All directional indicators in the embodiments of the present invention (such as upper, lower, left, right, front, rear, inner, outer, top, bottom … …) are only used to explain the relative position between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. When an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1 to 2, the present invention provides a stepping motor 100, where the stepping motor 100 includes: rotor 1 and the stator module who encircles rotor 1, stator module include the stator 2 of a plurality of the same settings, and a plurality of stators 2 pile up the setting along the axial, and the rotor 1 is located to the interval cover outside.

The rotor 1 comprises a rotating shaft 11, a cylindrical magnetic steel 12 sleeved outside the rotating shaft 11, and a rotor magnetic pole 13 arranged on the outer surface of the magnetic steel 12. The rotor magnetic pole 13 includes a first magnetic stripe 131 and a second magnetic stripe 132 with opposite magnetism (for example, the first magnetic stripe 131 is an N pole, and the second magnetic stripe 132 is an S pole), and a plurality of the first magnetic stripes 131 and the second magnetic stripes 132 are interlaced to form a ring shape and are sleeved on the outer surface of the columnar magnetic steel 12. The first magnetic stripe 131 and the second magnetic stripe 132 are strip-shaped and respectively extend along the axial direction of the rotating shaft 11 on the outer surface of the magnetic steel 12. The number and the thickness of the first magnetic stripe 131 and the second magnetic stripe 132 are the same, and the number can be set as required. The first magnetic stripe 131 and the second magnetic stripe 132 both extend in a stripe shape between two ends of the magnetic steel 12. Stator 2 also is the tube-shape, and a plurality of stators 2 are overlapped and are just encircleed rotor 1 along the 11 axial of pivot, and stator 2 is including the voice coil 21 that is the tube-shape, locate the voice coil 21 inboard that is close to rotor 1 and the stator magnetic pole that corresponds the setting with rotor 1 magnetic pole and twine in the coil 22 that deviates from the voice coil 21 outside of rotor 1.

Referring to fig. 2-5, the voice coil 21 includes a cylindrical body 211 having two opposite ends 212 and a winding post 213 disposed on one of the ends 212, wherein the end 212 is annular.

In an alternative embodiment, referring to fig. 2-5, the voice coil 21 further includes a ring-shaped limiting platform 214, and the limiting platform 214 is formed by extending from an edge of the end portion 212 in a direction radially away from the rotation axis 11 and is used for limiting the coil 22 to be wound on the outer surface of the cylindrical body 211 between the two end portions 212.

In an alternative embodiment, referring to fig. 2-5, the voice coil 21 further includes a boss 215 extending from an edge of one of the limiting blocks 214 in a direction radially away from the rotating shaft 11, the boss 215 is plate-shaped, one end of the boss 215 away from the limiting block 214 extends out of two winding posts 213 in the direction radially away from the rotating shaft 11, and the two winding posts 213 are spaced apart from each other. Here, the boss 215 is formed in a square plate shape, and the winding post 213 is formed in a columnar shape and extends in a direction away from the rotation shaft 11.

Referring to fig. 2-5, the coil 22 includes a coil main body 221 wound around the cylindrical main body 211 and terminals 222 wound around the winding posts 213, the coil 22 can be wound around the cylindrical main body 211 until the cylindrical main body 211 between the limiting blocks 214 is completely covered, and two terminals 222 led out from the coil 22 are respectively wound around the two winding posts 213 to cover a first plane 2131, a second plane 2132, a third plane (not shown) opposite to the first plane 2131, and a fourth plane (not shown) opposite to the second plane 2132 of the winding posts 213. The coil 22 is an enameled wire, which includes a conductive core and an insulating layer wrapped around the conductive core, and the insulating layer of the coil at the terminal 222 is removed by laser irradiation. The insulation layer of the enamel wire is removed by laser energy by irradiating a low power laser to the terminal 222 to be removed, and the laser irradiation may be performed to the enamel wire on the first plane 2131, the second plane 2132, the third plane and the fourth plane.

According to the stepping motor 100, the insulating layer of the wiring terminal 222 of the winding column 213 of the coil 22 on the voice coil 21 is removed through laser irradiation, so that the temperature resistance grade of the insulating layer of the coil 22 can be improved, the temperature resistance grade of the whole voice coil 21 is higher, reliability tests such as locked rotor test and the like are improved, and the performance of the motor 100 is improved. Meanwhile, the damage of the winding column 213 caused by the traditional process (a tin furnace or a mode similar to silk-screen printing) is avoided, and the processing efficiency is improved.

In an optional embodiment, referring to fig. 1 and fig. 2, the motor 100 further includes a circuit board 4, the circuit board 4 is a flexible circuit board, the circuit board 4 is provided with a plurality of rows of interfaces corresponding to the plurality of stators 2, each stator 2 corresponds to one row of interfaces, each row has two interfaces 41, the interfaces 41 are connected to the positive and negative electrodes of the power supply, the two winding posts 213 of each stator 2 penetrate through the interfaces 41 to enable the terminals 222 to abut against the circuit board 4, the circuit is conducted, and the coils 22 generate current.

In an alternative embodiment, referring to fig. 2, the stator magnetic pole 23 includes two first claw poles 231 and two second claw poles 232 (for example, the first claw pole 231 is an N pole, and the second claw pole 232 is an S pole) which are matched into a cylindrical shape and have opposite magnetic poles, and the first claw pole 231 and the second claw pole 232 have the same structure. The first claw pole 231 includes a first annular portion 2311 and a plurality of first claw poles 2312 provided at intervals on the first annular portion 2311, and the plurality of first claw poles 2312 are provided on the same surface of the first annular portion 2311. The second claw pole 232 includes a second annular portion 2321 and a plurality of second claw-shaped magnetic poles 2322 disposed at intervals on the second annular portion 2321, and the plurality of second claw-shaped magnetic poles 2322 are disposed on the same surface of the second annular portion 2321. The first claw-shaped magnetic pole 2312 of the first claw pole 231 is in spaced fit with the second claw pole 232, and the second claw-shaped magnetic pole 2322 of the second claw pole 232 is in spaced fit with the first claw pole 231 to form a cylindrical structure, and the spacer is arranged outside the rotor 1 and is opposite to the rotor magnetic pole 13.

In an alternative embodiment, referring to fig. 2, the motor 100 further includes a casing 33 surrounding the voice coil 21, the casing 33 is a cylindrical structure, wherein the casing 33 may be a plurality of casings 33 connected to the stator 2, and may be integrated with the stator 2, and one end of the casing 33 is connected to the annular portion of one of the claw poles.

In an alternative embodiment, referring to fig. 1 and 2, the motor 100 further includes covers 31 disposed at two ends of the casing wall 33, a housing space for housing the rotor 1 and the plurality of stators 2 is formed between the casing wall 33 and the covers 31, the covers 31 are annular, the inner ring is provided with a bearing 32, the rotating shaft 11 is disposed on the bearing 32, and the casing wall 33, the covers 31 and the bearing 32 are combined into the housing 3.

In an alternative embodiment, referring to fig. 2, two spacers 14 are further sleeved on the rotating shaft 11 of the rotor 1, and the two spacers 14 are respectively disposed between two ends of the magnetic steel 12 and the bearing 32.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A stepping motor, comprising: the stator comprises a rotor and a plurality of stators arranged around the rotor;

2. The motor of claim 1, wherein said voice coil further comprises a stop extending from an edge of said end portion in a direction radially away from said axis of rotation.

3. The motor of claim 2, wherein the voice coil further comprises a boss extending from an edge of one of the position-limiting blocks in a direction radially away from the rotation axis, the boss is shaped like a plate, two winding posts extend from an end of the boss away from the position-limiting block in the direction radially away from the rotation axis, and the two winding posts are spaced apart from each other.

4. The electric machine of claim 3 wherein said winding post is cylindrical and extends from said boss in a direction away from said axis of rotation.

5. The motor of claim 1, further comprising a circuit board having an interface, wherein the winding post extends through the interface such that the terminal is connected to the circuit board.

6. The motor of claim 1, wherein the stator pole comprises two opposing claw poles that fit together in a cylindrical shape, the claw poles comprising an annular portion and a plurality of claw poles spaced apart from the annular portion, wherein the claw pole of one claw pole fits in the space of the other claw pole.

7. The motor of claim 1, further comprising a housing wall surrounding the voice coil, the housing wall having a cylindrical configuration, one end of the housing wall being connected to the annular portion of the claw pole.

8. The motor of claim 7, further comprising covers disposed at opposite ends of the housing wall, wherein the housing wall and the covers define a space therebetween for receiving the rotor and the plurality of stators, wherein the covers include a cover body and a bearing disposed in the cover body, wherein the covers are annular, the bearing is disposed on an inner ring, and the shaft is disposed on the bearing.

9. The motor of claim 8, wherein said rotor further comprises two annular spacers disposed around said shaft, each of said two annular spacers being disposed between two ends of said magnetic steel and said two bearings.

10. The motor of claim 1, wherein the magnetic steel is cylindrical, and the first magnetic stripe and the second magnetic stripe are strip-shaped and respectively extend along the axial direction of the rotating shaft on the outer surface of the magnetic steel.