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CN104426303B - The motor assembled for the assembly method of permanent magnet DC motor and by this method - Google Patents

The motor assembled for the assembly method of permanent magnet DC motor and by this method Download PDF

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Publication number
CN104426303B
CN104426303B CN201310365612.6A CN201310365612A CN104426303B CN 104426303 B CN104426303 B CN 104426303B CN 201310365612 A CN201310365612 A CN 201310365612A CN 104426303 B CN104426303 B CN 104426303B
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Prior art keywords
shell
permanent magnet
assembly method
motor
tubular
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CN201310365612.6A
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CN104426303A (en
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胡国俊
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AILONGWEI ELECTROMECHANICAL Co Ltd ZHAOQING CITY GUANGDONG PROV
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AILONGWEI ELECTROMECHANICAL Co Ltd ZHAOQING CITY GUANGDONG PROV
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Abstract

The present invention relates to a kind of assembly method for being used to assemble permanent magnet DC motor, the permanent magnet DC motor includes the shell of metal tubular and the permanent magnet of tubular, and the assembly method includes step:a)The shell is heated to predetermined heating-up temperature;b)The permanent magnet is axially forced to the shell to predetermined installation site along the shell;c)Insulation a period of time;And d)The shell and permanent magnet are cooled down, wherein, interference fit is formed between the shell and the permanent magnet.The invention further relates to the permanent magnet DC motor obtained by above-mentioned assembly method.According to the present invention assembly method spent time is short, efficiency high.There is high concentricity according between the permanent magnet and shell of the permanent magnet DC motor of the present invention.

Description

The motor assembled for the assembly method of permanent magnet DC motor and by this method
Technical field
The present invention relates to a kind of assembly method for permanent magnet DC motor, relate more specifically to set of permanent magnets being attached to electricity Assembly method in machine shell, in addition, further relating to the permanent magnet DC motor that thus assembly method is obtained.
Background technology
In the prior art, the DC micro-motor for being generally used for automotive seat Wei Ge regulations is permanent magnet DC motor, most Conventional pole material is ferrite or neodymium iron boron etc..The pole piece being made up of these pole materials can use magnetic cylinder or magnetic The form of ring.At present, in assembling motor, before magnetic cylinder is loaded into motor housing, smeared in advance between magnetic cylinder and shell Glue(It is usually industrially A/B glue, the A/B glue of the special brand of such as Kraft), then, magnetic cylinder is loaded into shell(It is between the two Gap coordinates), afterwards, the magnetic cylinder being set in together and shell Fang Ge are toasted one in the high-temperature cabinet of about 85 DEG C of baking temperature Hour, to ensure pulling-out force of the magnetic cylinder in shell.
In existing assemble method, the baking process not only expends man-hour, and magnetic cylinder has slightly in high-temperature cabinet Demagnetization phenomenon so that cause motor power output reduction.Further, since the coating thickness of glue is uneven, magnetic cylinder is caused outside The concentricity installed in shell is not high, and causing assembled motor, noise is big in the running.
Therefore, it is contemplated that find it is a kind of can overcome said one in the prior art or multiple problems be used for permanent magnetism The assembly method or permanent magnet DC motor of direct current generator.
The content of the invention
One aspect of the present invention provides a kind of assembly method for permanent magnet DC motor, and the permanent magnet DC motor includes metal The shell of the tubular of system and the permanent magnet of tubular, the assembly method make it possible to high assembly line operating efficiency, high concentric Permanent magnet is arranged in shell by degree.
Above-mentioned purpose is realized by the assembly method with following technical characteristic:
The assembly method includes step:a)The shell is heated to predetermined heating-up temperature;b)By the permanent magnet edge That the shell is axially forced to the shell to predetermined An Zhuan Wei Ge;c)Insulation a period of time;And d)Cooling is described outer Shell and permanent magnet, wherein, interference fit is formed between the shell and the permanent magnet.By the assembly method, advantageously Ensure that the inwall of shell and the outer wall of permanent magnet are highly in close contact, so as to obtain high concentricity.
In a preferred embodiment, before a) step or in progress a)Inwall while step in the shell is coated Anaerobic adhesive.The use of anaerobic adhesive allows to further strengthen the assembling intensity between permanent magnet and shell.Before a) step Anaerobic adhesive is coated in and may insure that the uniformity of anaerobic adhesive coating is more preferable on outer casing inner wall.And carrying out a)Will while step Anaerobic adhesive, which is coated on outer casing inner wall, can reduce the resistance of pressing in caused by anaerobism adhesive curing, and can further shorten The time required to whole assembly technology.
In one embodiment, the permanent magnet is made up of neodymium iron boron, and the shell is made up of plated steel sheet, described Predetermined heating-up temperature is 100 DEG C.High installation concentricity of the permanent magnet in shell can be obtained by the assembly method.
Advantageously, in c)In step, soaking time is the several seconds, preferably 2 seconds.The soaking time of several seconds, which is just enough to ensure that, detests The viscous force that oxygen glue is applied between permanent magnet and shell, thus avoid in existing assembly method up to 1 hour Therefore operating efficiency on baking time, whole assembly line can greatly improve.
Advantageously, in b)In step, the axial direction of the shell is vertical direction, and the permanent magnet is from top to bottom pressed into In the shell.Permanent magnet is from top to bottom pressed into shell, it is comparatively simple and easy to apply, and control cost low.
In a preferred embodiment, a) step includes being added with the electrical heating wire being wrapped on the outer wall of the shell The heat shell.Shell is heated by electrical heating wire, it is simple and easy to apply, and convenient control and regulation, therefore operating cost and control It is made low.
Advantageously, the predetermined installation position with the permanent magnet on the outer wall of the shell is wrapped in the electrical heating wire Region corresponding Ge.Due to heating the Ju Bu Wei Ge just for shell so that can almost ensure equal assembling effect While the power consumption of heating can be minimized.
In a preferred embodiment, in a)Before step or in progress a)While step or in a)Step and b)Step it Between, the shell is removably mounted on fixed pedestal, by the permanent magnet be arranged on stationary fixture on and relative to The shell alignment positioning.
In an advantageous embodiment, in b)In step, by She Ge one end of the permanent magnet breach or boss with She Ge ensure the permanent magnet in the shell in the cooperation of the Xiang Ying Wei Ge of the inwall of the shell boss or breach An Zhuan Wei Ge.By means of location structures such as above-mentioned boss or breach, it is ensured that permanent magnet is in the upward compression distance of enclosure axis(Or Axially position of the permanent magnet on shell), as a result, permanent magnet can be assembled according to advance design, so avoid by Axially mounted position Ge of the permanent magnet on shell is caused not to be inconsistent with being pre-designed in misoperation.Further, it is also possible to advantageously Realize alignment of the permanent magnet relative to shell in whole assembling process.
According to another aspect of the present invention there is provided a kind of permanent magnet DC motor, including metal tubular shell and The permanent magnet of tubular, wherein the permanent magnet is installed in the housing by above-mentioned assembly method.
Concentricity high between shell and permanent magnet is able to ensure that according to the permanent magnet DC motor of the present invention and motor is ensured With low noise level, in addition, the permanent magnet DC motor of the present invention is easy to assembly, technique takes short, assembly line efficiency high.
The permanent magnet DC motor of the present invention is particularly suitable to be used in the car, is used for example as being used to adjust the shifting of seat horizontal direction Dynamic motor, the comfortableness to lift vehicle.
Brief description of the drawings
Fig. 1 shows the general assembly schematic diagram of the permanent magnet DC motor according to the present invention;
Fig. 2 shows the stereogram according to the shell of the present invention and the package assembly of magnetic cylinder;
Fig. 3 shows the enlarged partial isometric view according to the shell of the present invention and the package assembly of magnetic cylinder;And
Fig. 4 shows the stereogram of the magnetic cylinder of the permanent magnet DC motor according to the present invention.
Reference numerals list
1 permanent magnet DC motor
2 shells
21 boss
3 permanent magnets
31 breach
4 rotor assemblies
41 rotors
42 commutators
43 rotating shafts
Embodiment
It will be shown in the drawings below referring in particular to various embodiments of the present invention, the example of the embodiment.As possible, All make identical to be denoted by the same reference numerals or similar part in all of the figs.
A kind of permanent magnet DC motor 1 of small-sized efficient is shown, it includes shell 2, permanent magnet 3, rotor assembly 4 etc. in Fig. 1. Wherein, rotor assembly 4 includes rotor 41, commutator 43 and rotating shaft 44 etc..Shell 2 is the cylindrical outer casing being made of metal.Permanent magnetism Body 3 is the magnetic cylinder or magnet ring of cartridge form or loop type.Permanent magnet 3 can be made up of materials such as Agglutinate neodymium-iron-boron, aluminium nickel cobalts.One In preferred embodiment, shell 2 is made up of plated steel sheet, and permanent magnet 3 is made up of neodymium iron boron.
In an embodiment according to the present invention, permanent magnet 3 is close to the inwall of shell 2 by press-fit and fixed.Particularly preferably Ground, permanent magnet 3 is assembled in shell 2 by " hot pressing " mode.
" hot pressing " specifically described herein refers in the case of predetermined temperature is heated in shell, and permanent magnet is pressed into Position Ge is filled to pre- Dingan County of permanent magnet in heated shell, then, the assembly being made up of shell and permanent magnet is cooled down, is led to Shell is crossed to expand with heat and contract with cold to realize the assembling of the high concentricity between shell and permanent magnet.
Specifically, the external diameter of the internal diameter of advance reasonable design shell and permanent magnet, it is ensured that between shell and permanent magnet Fit tolerance ensures that the gap between permanent magnet and shell makes permanent magnet fit easily in and can make in rational scope of design, that is, Permanent magnet and shell are in the state of interference fit.
According to the present invention, process permanent magnet being assembled in shell is divided into following several stages:
- the preparatory stage:Shell removably and is vertically mounted on fixed pedestal.Permanent magnet is removably pacified On stationary fixture.Realize that alignment of the permanent magnet relative to shell is positioned by the control of the movement to stationary fixture.Outside Electrical heating wire is put around shell, the nested domain corresponding with pre- Dingan County dress position Ge of permanent magnet preferably on the outer wall of shell If electrical heating wire.One layer of anaerobic adhesive is evenly coated with the inwall of shell.Specific execution is had no between above-mentioned preparatory process Sequentially, from the point of view of technique spent time is shortened, multiple processes therein can be performed parallel in exercisable scope.
- the heating period:Electrical heating wire is powered, shell is heated to predetermined heating-up temperature(The measurement point cloth of the temperature Ge is in the corresponding regions of shell and permanent magnet pre- Dingan County dress position Ge, and the usual predetermined heating-up temperature is more than 100 DEG C).It is logical Cross the real-time regulation to heater strip heating power and control may insure to reach the predetermined temperature of shell within the as far as possible short time. The given example that shell is heated with electrical heating wire is not limited to for the mode of heating of shell.Those skilled in the art can By expect other it is available heating shells in the way of, for example by shell as heating bathing pool in or by the local sleeve of shell wherein Circulation has heating mantle of heating medium etc..The tool that shell 2 is made up of plated steel sheet wherein, permanent magnet 3 is made up of neodymium iron boron In body embodiment, predetermined heating-up temperature is 100 DEG C.
- press-in the stage:The displacement of stationary fixture is controlled by controller, pressure is applied to permanent magnet so that permanent magnet edge The axial direction for shell is from top to bottom wriggled to the axial depths position Ge of shell, so that permanent magnet is pressed into shell into permanent magnet Pre- Dingan County fills position Ge.In the process of press in of permanent magnet, the heating to shell is uninterrupted.Shell after heated can be in diametrically Expand to certain amplitude, so that necessary space is vacateed in the immigration to permanent magnet.
- holding stage:When permanent magnet reaches its pre- Dingan County dress position Ge in shell, stop pressing to permanent magnet, and The heating power of electrical heating wire is adjusted, shell is in keeping warm mode.Shell is set to maintain a period of time under the keeping warm mode.Should Period is usually the several seconds.The specific embodiment that shell 2 is made up of plated steel sheet wherein, permanent magnet 3 is made up of neodymium iron boron In, the period is preferably 2 seconds.
- cooling stage:Shell is pulled down from fixed pedestal and thus the assembly being made up of permanent magnet and shell is removed, by this Assembly is cooled to normal temperature state, so as to complete the assembling in permanent magnet to shell.In cooling stage, permanent magnet 3 and shell 2 are natural Cooling, permanent magnet and shell all can slightly be shunk due to the reduction of temperature, due to change of the amplitude of deformation compared with permanent magnet 3 of shell 2 Shape amplitude is big, hence in so that shell can be further from being adjacent to permanent magnet radially inward, and then ensures between shell and permanent magnet High concentricity, so as to advantageously reduce the noise of assembled permanent magnet DC motor.
In fact, being taken to shorten technique, the process portion in the preparatory stage can be with the heater in the heating period Sequence is carried out or carried out between heating period and press-in stage together.Those skilled in the art can facilitate journey according to concrete operations Degree takes requirement etc. to adjust accordingly.
As shown in Fig. 2 the perisporium of permanent magnet 3 is close to the inwall of shell 2.Because permanent magnet 3 is the side by " hot pressing " Formula is installed in shell 2, therefore, compared with traditional mounting process, it is convenient to omit the baking time of shell and permanent magnet, drop The possibility that the low permanent magnet in baking process demagnetizes, moreover, can due to the shortening of whole assembly technology spent time To greatly improve the operating efficiency on assembly line.
In one embodiment, anaerobic adhesive can also be coated on the inwall of shell while being heated to shell, from And be more beneficial for further shortening whole assembly technology spent time.Generally, the condition of cure of anaerobic adhesive is:(1) starvation, Gap typically requires to be less than 0.2mm;(2) active initiation center, such as metal, accelerator be present.By permanent magnet be pressed into shell it Before, the condition of cure of anaerobic adhesive is also not up to.And only when permanent magnet is pressed into shell, between permanent magnet and shell Uncured anaerobic adhesive progressively fill up the gap between permanent magnet and shell(Although being between the two interference fit, It is, because the roughness that surface locally has still can provide receiving space to anaerobic adhesive).Now, at the beginning of the condition of cure of anaerobic adhesive Step is formed.
When being in keeping warm mode in holding stage shell and permanent magnet(Comparatively, shell is at higher temperature) When, because the higher temperature of shell is more beneficial for the rapid curing of anaerobic adhesive, anaerobic adhesive curing rate is accelerated, therefore, during insulation Between maintain the several seconds and be just enough to obtain enough viscous forces, so that it is guaranteed that permanent magnet will not be produced when taking out shell and permanent magnet The relative slip with shell.Whole press-in stage and holding stage total duration are short, and heated portion only has permanent magnetism The outer surface of body, because permanent magnet has low heat conductivility, the contact with the high temperature enclosure short time of permanent magnetism external surface in itself The demagnetization of permanent magnet is not resulted in.With the cold events of the shell in cooling stage, appropriateness is formed between permanent magnet and shell Interference fit, anaerobic adhesive between permanent magnet and shell is in oxygen-free environment, thus in the situation for being not required to additionally toast, Anaerobic adhesive can keep good viscosity.
It is can be seen that with reference to Fig. 3 and Fig. 4 in further advantageous embodiment, She Ge have symmetrically Shang an end face of permanent magnet 3 Two locating notches 31, the predetermined axle in shell 2 on the inwall of shell locates provided with inwardly protruded boss 21 to position Ge, The boss 21 is engaged with the locating notch 31 on the end face of permanent magnet 3 so that may insure that permanent magnet 3 is fixed in shell 2 At pre- Dingan County's dress position Ge.Certainly, those skilled in the art are also readily apparent that:In predetermined axial direction and week on the inwall of shell 2 Ge is set with reeded bulge-structure to position Ge, mutually answers position Ge to set Ge along permanent magnet axially to prolong in the predetermined end face of permanent magnet 3 The projection stretched, realizes permanent magnet in shell by the raised cooperation on the groove on the shell and the permanent magnet Location and installation.By means of above-mentioned location structure, not only improve and complete alignment positioning of the permanent magnet relative to shell in the preparatory stage Work, can also be conducive to the control to permanent magnet compression distance in the press-in stage.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, to those skilled in the art For, a variety of improvement and modification can be made to this invention Zhuan Ge in the case of without departing from the scope of the present invention.This area Technical staff by considering that the content disclosed in this specification also can obtain other embodiments.This specification and example only should be by It is considered as exemplary, of the invention true scope by appended claims and equivalents.

Claims (8)

1. a kind of assembly method for being used to assemble permanent magnet DC motor, the permanent magnet DC motor includes the shell of metal tubular With the permanent magnet of tubular, the assembly method includes step:
A) shell is heated to predetermined heating-up temperature;
B) permanent magnet is axially forced to the shell to predetermined installation site along the shell;
C) insulation a period of time;And
D) shell and permanent magnet are cooled down, wherein, interference fit is formed between the shell and the permanent magnet,
Inwall wherein before a) step or in the shell while a) step is carried out coats anaerobic adhesive, the permanent magnet It is made up, the shell is made up of plated steel sheet, the predetermined heating-up temperature is 100 DEG C, in c) step, protects of neodymium iron boron The warm time is the several seconds.
2. assembly method according to claim 1, it is characterised in that in b) step, the axial direction of the shell is vertical Direction, the permanent magnet is from top to bottom pressed into the shell.
3. assembly method according to claim 1 or 2, it is characterised in that a) step includes described outer with being wrapped in Electrical heating wire on the outer wall of shell heats the shell.
4. assembly method according to claim 3, it is characterised in that the electrical heating wire is wrapped in the outer wall of the shell On the region corresponding with the predetermined installation site of the permanent magnet.
5. assembly method according to claim 1 or 2, it is characterised in that before a) step or carrying out a) step Simultaneously or in a) step and b) between step, the shell is removably mounted on fixed pedestal, the permanent magnet is pacified It is aligned on stationary fixture and relative to the shell and positions.
6. assembly method according to claim 1 or 2, it is characterised in that in b) step, by being arranged on the permanent magnetism The cooperation of the boss or breach of the relevant position of inwall of the breach or boss of one end of body with being arranged on the shell ensures Installation site of the permanent magnet in the shell.
7. assembly method according to claim 1, it is characterised in that in c) step, soaking time is 2 seconds.
8. a kind of permanent magnet DC motor, includes the shell and the permanent magnet of tubular of metal tubular, wherein the permanent magnet is logical The assembly method according to one of claim 1-7 is crossed to install in the housing.
CN201310365612.6A 2013-08-21 2013-08-21 The motor assembled for the assembly method of permanent magnet DC motor and by this method Active CN104426303B (en)

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CN104426303B true CN104426303B (en) 2017-07-28

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106052990B (en) * 2016-05-23 2018-03-09 脉创测控装备科技(苏州)有限公司 The method for reducing shake table impedance
CN108000112A (en) * 2018-01-16 2018-05-08 恒速控股有限公司 A kind of motor assembling line and its stator press-loading transmission equipment

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US4445060A (en) * 1980-12-20 1984-04-24 Robert Bosch Gmbh Electric starter motor with holder for permanent magnets
US5874794A (en) * 1995-07-28 1999-02-23 Ryobi North America, Inc. Method for securing magnets to a permanent magnet motor shell and a motor made therefrom
CN1230044A (en) * 1998-03-06 1999-09-29 马渊马达株式会社 Mfg. method of small motor and sintered alloy-made oil containing bearing
JP3918874B2 (en) * 2004-11-30 2007-05-23 愛知製鋼株式会社 Motor housing and motor device
CN101964569A (en) * 2009-07-24 2011-02-02 上海新沪电机厂有限公司 Technology for processing motor by hot pressing
CN103051115A (en) * 2012-12-31 2013-04-17 广东超力微电机有限公司 Assembling machine for micromotor stator assemblies

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US20060071567A1 (en) * 2004-10-01 2006-04-06 Siemens Vdo Automotive Corporation Plastic molded motor housing
EP2562775B1 (en) * 2010-04-05 2017-11-01 Aichi Steel Corporation Production method for case-integrated bonded magnet
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Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US4445060A (en) * 1980-12-20 1984-04-24 Robert Bosch Gmbh Electric starter motor with holder for permanent magnets
US5874794A (en) * 1995-07-28 1999-02-23 Ryobi North America, Inc. Method for securing magnets to a permanent magnet motor shell and a motor made therefrom
CN1230044A (en) * 1998-03-06 1999-09-29 马渊马达株式会社 Mfg. method of small motor and sintered alloy-made oil containing bearing
JP3918874B2 (en) * 2004-11-30 2007-05-23 愛知製鋼株式会社 Motor housing and motor device
CN101964569A (en) * 2009-07-24 2011-02-02 上海新沪电机厂有限公司 Technology for processing motor by hot pressing
CN103051115A (en) * 2012-12-31 2013-04-17 广东超力微电机有限公司 Assembling machine for micromotor stator assemblies

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