CN114337185A - Linear motor module - Google Patents
Linear motor module Download PDFInfo
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- CN114337185A CN114337185A CN202111654993.0A CN202111654993A CN114337185A CN 114337185 A CN114337185 A CN 114337185A CN 202111654993 A CN202111654993 A CN 202111654993A CN 114337185 A CN114337185 A CN 114337185A
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- linear motor
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Abstract
The invention discloses a linear motor module which comprises an installation seat, an installation plate arranged on the installation seat, a stator arranged on the installation plate and composed of an array structure permanent magnet assembly, a linear guide rail arranged on the installation seat, a sliding block arranged on the linear guide rail, a moving plate arranged on the sliding block, and an inductor arranged on one side of the moving plate opposite to the stator and provided with a winding, wherein the array structure permanent magnet assembly is of a non-magnetic yoke structure, the installation plate is made of a non-magnetic material, the winding is configured into m same-core windings, m is an integer larger than or equal to 2, the magnetic pole spacing of the m same-core windings is tau 1, and the array structure permanent magnet assembly comprises a plurality of permanent magnets. The linear motor module can reduce normal attraction, lighten the weight of the linear motor module, reduce trust change, reduce cost and simplify the structure, can accelerate assembly and debugging, simplify the manufacturing process and does not influence the motion precision of the whole device.
Description
Technical Field
The invention relates to the technical field of linear modules, in particular to a linear motor module.
Background
In the automation industry, many linear modules are known. A conventional linear module consists of a rotating motor, a guide rail, a ball screw, and a nut coupler or nut mount. The working principle is that the rotary motion of the motor is converted into the linear motion of the moving platform through the ball screw and the nut coupling, and when the ball screw is rotated by the motor, the nut base slides on the screw and moves linearly along the guide rail. Although the traditional linear module is widely applied to the intelligent manufacturing fields such as intelligent manufacturing, industrial robots, precision machine tools, mechanical industry, intelligent automation, biotechnology and the like, and has good performance, the traditional linear module also has the following defects: the precision is relatively low, and ball is expensive, and the processing degree of difficulty is big, has restricted ball's length, also brings the difficulty for high-speed operation simultaneously.
If the linear motor is adopted for direct drive, intermediate links of transmission chains such as a speed reducer, a lead screw, a belt, a gear rack and the like are omitted, and the transmission precision and the response speed of the system are improved; a linear module integrated with a linear motor is called a linear motor module. Currently, a large number of linear motor modules are used in the automation industry. A conventional linear motor module includes a permanent magnet array stator and a linear inductor mounted on a mover to slide along a guide rail. The working principle is that the magnetic field of the linear motor inductor interacts with the permanent magnet of the stator to provide linear motion of the linear motor inductor, and the moving platform is forced to slide along the guide rail through direct driving without transmission. The use of linear motors in industrial plants is mainly highlighted by the convenience of the machine tools. In recent years, the use of linear motors in numerically controlled machines has become particularly popular internationally. The reason is that the drive of the conventional machine tool is driven by the screw, which is itself the drive. It has the following disadvantages: length restrictions, mechanical clearance, precision after rubbing, etc. The linear motor can achieve ultra-high precision, and the speed is 10 times or more than that of the screw. There are still some significant disadvantages: if the precision is high, the permanent magnet is difficult to install on the steel mounting plate, and has higher normal suction, has reduced linear bearing's life and great trust change.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a linear motor module which can reduce normal attraction, lighten the weight of a linear motor module, reduce trust change, reduce cost, simplify the structure, accelerate assembly and debugging, simplify the manufacturing process and have no influence on the motion precision of the whole device.
In order to achieve the purpose, the invention provides the following technical scheme:
a linear motor module comprises a mounting seat, a mounting plate arranged on the mounting seat, a stator arranged on the mounting plate and composed of permanent magnet assemblies with an array structure, a linear guide rail arranged on the mounting seat, a sliding block arranged on the linear guide rail, a moving plate arranged on the sliding block, and an inductor arranged on one side of the moving plate opposite to the stator and provided with windings, wherein the permanent magnet assemblies with the array structure are in a non-magnetic yoke structure, the mounting plate is made of non-magnetic materials, the windings are configured into m same-center windings, m is an integer larger than or equal to 2, the magnetic pole spacing of the m same-center windings is tau 1, the permanent magnet assemblies with the array structure comprise a plurality of permanent magnets, the magnetic pole spacing between the permanent magnets is tau 2, wherein τ 2/τ 1=3/2, inductor tooth number Z1 is equal to n × m, n is an integer greater than or equal to 1, slot pitch tZ1= τ 1, and inductor tooth width bZ 1= τ 2/3= τ 1/2.
Preferably, the moving plate is provided with an encoder, and the mounting seat is provided with a magnetic scale arranged opposite to the encoder.
Preferably, the movable plate is provided with a supporting cover plate, an accommodating space is formed between the movable plate and the supporting cover plate, and a protective cover plate is arranged in the accommodating space.
Preferably, the permanent magnet is obliquely arranged on the mounting plate, and the inclination angle is 4-5 degrees.
Preferably, the iron core of the m-shaped concentric windings is made of electrical steel, and the inductor is a linear inductor.
Preferably, the mounting plate is made of aluminum.
The invention has the beneficial effects that:
the linear motor module can reduce normal attraction, lighten the weight of the linear motor module, reduce trust change, reduce cost and simplify the structure, can accelerate assembly and debugging, simplify the manufacturing process and does not influence the motion precision of the whole device.
Drawings
FIG. 1 is a first schematic structural diagram in accordance with an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1;
FIG. 3 is a second schematic structural diagram in accordance with an embodiment of the present invention;
FIG. 4 is a cross-sectional view of an embodiment of the present invention;
FIG. 5 is a schematic diagram of a structure reflecting local magnetic moments according to an embodiment of the present invention;
in the figure: 1. a mounting seat; 11. mounting a plate; 12. a linear guide rail; 13. a magnetic scale; 2. an array structure permanent magnet assembly; 3. a slider; 4. moving the plate; 41. an encoder; 5. an inductor; 6. a winding; 7. a support cover plate; 8. and a protective cover plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, a linear motor module includes a mounting base 1, a mounting plate 11 disposed on the mounting base 1, a stator disposed on the mounting plate 11 and composed of an array structure permanent magnet assembly 2, a linear guide rail 12 disposed on the mounting base 1, a slider 3 mounted on the linear guide rail 12, a moving plate 4 disposed on the slider 3, and a linear inductor 5 disposed on one side of the moving plate 4 opposite to the stator and having a winding 6, the array structure permanent magnet assembly 2 is configured to have a magnet yoke-free structure, the mounting plate 11 is made of a non-magnetic material, specifically, may be made of aluminum, the winding 6 is configured to have m-like core windings 6, m is an integer greater than or equal to 2, specifically, m is 3, that is, the magnetic pole pitch of the 3-like core windings 6 is τ 1, an iron core of the 3-like core windings 6 is made of electrical steel, the array structure permanent magnet assembly 2 includes a plurality of permanent magnets, the magnetic pole spacing between the permanent magnets is tau 2, wherein tau 2/tau 1=3/2, the inductor 5 tooth number Z1 is equal to n × m, n is an integer greater than or equal to 1, the slot pitch tZ1= tau 1, and the inductor 5 tooth width bZ 1= tau 2/3= tau 1/2.
By adopting the above technical solution, although the non-ferrous design of the secondary portion leads to a reduction in thrust, loads such as normal attraction force on the linear guide rail 12 and friction loss are significantly reduced. Through the design of local magnetic moment, the permanent magnet is installed on mounting panel 11 and does not need special tool, so can accelerate equipment and debugging, simplify manufacturing process to do not influence the motion accuracy of whole device.
As a modified embodiment, the moving plate 4 is provided with an encoder 41, and the mounting base 1 is provided with a magnetic scale 13 disposed opposite to the encoder 41.
By adopting the above technical scheme, the encoder 41 can be matched with the magnetic scale 13 to read the position of the sliding block 3 when moving along with the moving plate 4.
As a modified embodiment, the moving plate 4 is provided with a supporting cover plate 7, a containing space is formed between the moving plate 4 and the supporting cover plate 7, and a protective cover plate 8 is arranged in the containing space.
Through adopting above-mentioned technical scheme, the setting of protection apron 8 can effectively protect array structure permanent magnet subassembly 2 to avoid the influence of dust.
As a modified embodiment, the permanent magnet is obliquely arranged on the mounting plate 11, and the inclination angle is 4-5 degrees.
Through adopting above-mentioned technical scheme, set up the permanent magnet slope for straight line inductor 5 is more smooth-going when sliding, can not have the condition that the card is pause, if two too big adjacent permanent magnet of inclination can inhale mutually, and set up inclination into 4-5 degrees, when guaranteeing that straight line inductor 5 slides smoothly, also avoid the condition that the permanent magnet inhales mutually.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A linear motor module comprises a mounting seat, a mounting plate arranged on the mounting seat, a stator arranged on the mounting plate and composed of an array structure permanent magnet assembly, a linear guide rail arranged on the mounting seat, a sliding block arranged on the linear guide rail, a moving plate arranged on the sliding block, and an inductor arranged on one side of the moving plate opposite to the stator and provided with windings, and is characterized in that the array structure permanent magnet assembly is of a nonmagnetic structure, the mounting plate is made of nonmagnetic materials, the windings are arranged into m same-core windings, m is an integer larger than or equal to 2, the magnetic pole spacing of the m same-core windings is tau 1, the array structure permanent magnet assembly comprises a plurality of permanent magnets, the magnetic pole spacing between the permanent magnets is tau 2, wherein tau 2/tau 1=3/2, the number of teeth Z1 is n x m, n is an integer larger than or equal to 1, and the slot pitch tZ1= tau 1, inductor tooth width bZ 1= τ 2/3= τ 1/2.
2. The linear motor module as claimed in claim 1, wherein the moving plate is provided with an encoder, and the mounting base is provided with a magnetic scale disposed opposite to the encoder.
3. The linear motor module as claimed in claim 1 or 2, wherein the moving plate is provided with a supporting cover plate, a receiving space is formed between the moving plate and the supporting cover plate, and a protective cover plate is disposed in the receiving space.
4. A linear motor module according to claim 1, characterised in that the permanent magnets are arranged obliquely to the mounting plate at an angle of 4-5 degrees.
5. A linear motor module according to claim 1, wherein the cores of the m-phase windings are electrical steel and the inductor is a linear inductor.
6. A linear motor module according to claim 1, characterised in that the mounting plate is made of aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654993.0A CN114337185A (en) | 2021-12-30 | 2021-12-30 | Linear motor module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654993.0A CN114337185A (en) | 2021-12-30 | 2021-12-30 | Linear motor module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114337185A true CN114337185A (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111654993.0A Pending CN114337185A (en) | 2021-12-30 | 2021-12-30 | Linear motor module |
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| Country | Link |
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| CN (1) | CN114337185A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001045735A (en) * | 1999-08-02 | 2001-02-16 | Yaskawa Electric Corp | Moving body structure of linear motor |
| CN1583360A (en) * | 2004-05-26 | 2005-02-23 | 浙江大学 | Feeder of permanent magnetic linear synchronous motor |
| JP2006087180A (en) * | 2004-09-15 | 2006-03-30 | Yaskawa Electric Corp | Permanent magnet type synchronous linear motor |
| CN101777821A (en) * | 2010-04-12 | 2010-07-14 | 哈尔滨工业大学 | Concentrated-winding multi-segment permanent magnet synchronous linear motor |
| CN202085060U (en) * | 2011-06-08 | 2011-12-21 | 东南大学 | Positioning linear motor based on halbach permanent magnetic array |
| CN103532337A (en) * | 2013-10-25 | 2014-01-22 | 肖俊东 | Permanent magnet linear motor and permanent magnet array component thereof, as well as permanent magnet motor and component thereof |
-
2021
- 2021-12-30 CN CN202111654993.0A patent/CN114337185A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001045735A (en) * | 1999-08-02 | 2001-02-16 | Yaskawa Electric Corp | Moving body structure of linear motor |
| CN1583360A (en) * | 2004-05-26 | 2005-02-23 | 浙江大学 | Feeder of permanent magnetic linear synchronous motor |
| JP2006087180A (en) * | 2004-09-15 | 2006-03-30 | Yaskawa Electric Corp | Permanent magnet type synchronous linear motor |
| CN101777821A (en) * | 2010-04-12 | 2010-07-14 | 哈尔滨工业大学 | Concentrated-winding multi-segment permanent magnet synchronous linear motor |
| CN202085060U (en) * | 2011-06-08 | 2011-12-21 | 东南大学 | Positioning linear motor based on halbach permanent magnetic array |
| CN103532337A (en) * | 2013-10-25 | 2014-01-22 | 肖俊东 | Permanent magnet linear motor and permanent magnet array component thereof, as well as permanent magnet motor and component thereof |
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