WO2020073837A1 - 长行程直线电机 - Google Patents

长行程直线电机 Download PDF

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Publication number
WO2020073837A1
WO2020073837A1 PCT/CN2019/108804 CN2019108804W WO2020073837A1 WO 2020073837 A1 WO2020073837 A1 WO 2020073837A1 CN 2019108804 W CN2019108804 W CN 2019108804W WO 2020073837 A1 WO2020073837 A1 WO 2020073837A1
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WO
WIPO (PCT)
Prior art keywords
mounting
base
guide rail
stator unit
linear motor
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PCT/CN2019/108804
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English (en)
French (fr)
Inventor
刘元江
孙颖
严雷
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歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020073837A1 publication Critical patent/WO2020073837A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors

Definitions

  • the present invention relates to the technical field of linear motors, and more particularly, to a long-stroke linear motor.
  • Linear motors are widely used. However, the formation of existing linear motors is very short. In the automated production line, due to the many processes, the short-stroke linear motor cannot meet the requirements.
  • An object of the present invention is to provide a new technology solution for a long-stroke linear motor.
  • a long-stroke linear motor includes a plurality of stator units that are spliced together.
  • the stator unit includes a base, a mounting bar, a magnetic assembly, a guide rail mounting seat, and a guide rail body.
  • the guide rail mounting seat and the magnetic assembly are provided on the plurality of mounting bars, the guide rail body is provided on the guide rail mounting seat, and one end of the stator unit in the sliding direction is the first end, The other end is a second end.
  • At least two of the base, the magnetic assembly, the guide rail mounting seat, and the guide rail body of the stator unit are misaligned at the first end, and at the second end
  • the first ends are arranged in a complementary manner staggered, wherein the first end of one of the stator units is spliced together with the second end of the other of the stator units.
  • the yoke includes a yoke and two of the guide rail mounting seats extending in the sliding direction.
  • the yoke is disposed on the plurality of mounting bars and is located between the two guide rail mounting seats.
  • the first end of the rail mounting seat is flush, and the second end is flush.
  • a first mounting surface is provided on the upper surface of the rail mounting base, and the rail body is fixed on the first mounting surface; it also includes a magnetic scale, and a side surface of the rail mounting base is provided with On the second mounting surface, the magnetic scale is mounted on the second mounting surface.
  • each mounting bar is fixed on one of the bases, and the other end is fixed on the other of the bases;
  • a first mounting groove parallel to the sliding direction is provided on the upper surface, a stop portion is provided at the opening of the first mounting groove, a first fastener is provided in the first mounting groove, and the stop portion is opposite The first fastener forms a stop, and in an unfastened state, the first fastener can slide along the first mounting groove, and a second fastener is provided on the base mounting bar, The second fastener is connected to the first fastener.
  • it further includes a reinforcing rib, and the side surface of the base is provided with a second mounting groove parallel to the sliding direction, and the reinforcing rib is respectively inserted into the second mounting grooves of the two bases spliced together Inside.
  • the adjacent rail mounting seats are fixedly connected by a connecting plate.
  • the first end of the guide rail mounting base protrudes from the first end of the base, the first end of the magnetic circuit assembly is retracted from the first end of the base, the first end of the guide rail body One end is retracted to the first end of the guide rail mounting seat.
  • a mounting bar is suspended below the first end of the guide rail mounting base, and a mounting position is provided at the second end of the base, the mounting position is used to install another stator unit suspended Set the installation bar.
  • a long-stroke linear motor includes a plurality of stator units spliced together.
  • the stator unit includes a base, a mounting bar, a magnetic component, a guide rail mounting seat, and a guide rail body.
  • the multiple mounting bars are arranged side by side and spaced apart from each other on the base
  • the guide rail mounting seat and the magnetic assembly are provided on the plurality of mounting bars
  • the guide rail body is provided on the guide rail mounting seat
  • one end of the stator unit along the sliding direction is the first end
  • the other end is At the second end
  • the plurality of stator units include a first stator unit and a second stator unit, wherein the base of the first stator unit, the magnetic assembly, the guide rail mounting seat, and the guide rail body At least two of them are arranged at a misalignment at the first end, and at least two of the base, the magnetic assembly, the guide rail mounting seat, and the guide rail body of the second stator unit are at the second end
  • the first end of the first stator unit is offset in a complementary manner, and the first end of the first stator unit is spliced together with the second end of the second stator unit.
  • the base, the mounting bar, the guide rail mounting seat, and the guide rail body are processed to a set size.
  • the linear motor has a strong structure and high positioning accuracy.
  • FIG. 1 is a schematic structural diagram of a long-stroke linear motor according to an embodiment of the present disclosure.
  • FIG. 2 is an assembly diagram of a long-stroke linear motor according to an embodiment of the present disclosure.
  • FIG. 3 is a partially enlarged view of FIG. 2.
  • FIG. 4 is a front view of a stator unit according to an embodiment of the present disclosure.
  • a long-stroke linear motor includes a plurality of stator units spliced together.
  • Each stator unit includes a base 12, a mounting bar 17, a magnetic assembly, a rail mounting seat 18, and a rail body 21.
  • Magnetic components are used to form magnetic or electromagnetic fields.
  • the magnetic component is a yoke 23.
  • the yoke 23 includes a magnetic conductive plate and a plurality of permanent magnets arranged side by side in the sliding direction. Multiple permanent magnets are fixed on the magnetic conducting plate.
  • the yoke 23 forms a magnetic field.
  • the stator of the linear motor includes a slider and a coil group fixed on the slider. The coil group cooperates with the yoke 23 and is located in the magnetic field of the yoke 23.
  • the magnetic circuit assembly may include coil sets arranged side by side along the sliding direction.
  • the stator assembly includes a slider and a permanent magnet provided on the slider.
  • the permanent magnet cooperates with the coil group, and the corresponding coil is located in the magnetic field of the permanent magnet.
  • the sliding direction refers to the direction when the mover assembly slides, as shown in C in FIG. 2.
  • a plurality of mounting bars 17 are provided on the base 12 side by side and spaced apart from each other.
  • the rail mounting base 18 and the magnetic assembly are provided on a plurality of mounting bars 17.
  • the mounting bar 17 is used to support the rail mounting base 18.
  • the rail body 21 is provided on the rail mount 18.
  • the base 12, the guide rail mounting seat 18, and the guide rail body 21 all have a linear structure and are parallel to the sliding direction.
  • the mounting bar 17 has a bar structure. The long side of the mounting bar 17 is perpendicular to the sliding direction to facilitate installation and positioning. Multiple mounting bars 17 are arranged at equal intervals. Of course, the mounting bar 17 may have other angles with respect to the sliding direction.
  • the mounting bar 17, the rail mounting seat 18, and the rail body 21 are respectively fixed by bolting, snapping, riveting, etc.
  • the guide rail body 21 is used to support the mover assembly so that the yoke 23 is spaced from the coil group.
  • a first mounting surface 19 is provided on the upper surface of the rail mounting base 18.
  • the rail body 21 is fixed on the first mounting surface 19.
  • the first mounting surface 19 is also provided with a guide rail positioning side surface 19a.
  • the guide rail positioning side surface 19a is used to position the guide rail so that the guide rail body 21 can be parallel to the sliding direction.
  • a second mounting surface 27a is provided on the side surface of the rail mount 18.
  • the magnetic scale 27 is mounted on the second mounting surface 27a.
  • the magnetic scale 27 cooperates with the reading head of the mover assembly to position the mover assembly.
  • one end of the meter stator unit in the sliding direction is the first end 25 and the other end is the second end 26.
  • At least two of the base 12 of the stator unit, the magnetic assembly, the rail mount 18, and the rail body 21 are misaligned at the first end 25 and misaligned at the second end 26 in a manner complementary to the first end 25.
  • the first end 25 of one of the stator units is spliced together with the second end 26 of the other stator unit, as shown in Figures 1-3.
  • the misalignment means that at least two end surfaces of the base 12, the magnetic assembly, the rail mounting base 18, and the rail body 21 are not in the same plane, for example, the plane is perpendicular to the sliding direction. For example, based on the plane where the end face of one of the parts is located, some parts protrude out of this plane, and some parts are indented in this plane.
  • the extending direction of the base 12, the magnetic assembly, the guide rail mounting seat 18, and the guide rail body 21 of each stator unit is parallel to the sliding direction.
  • Complementary means that if the first end 25 of one part protrudes beyond the plane of the end face of the first end 25 of the other part, the second end 26 of the part is retracted from the second end 26 of the other part.
  • the end face of one of the parts; if the first end 25 of one part is indented in the plane of the end face of the first end 25 of the other part, the second end 26 of the part protrudes from the end face of the second end 26 of the other part To complement each other.
  • the bases 12 of different stator units are docked with the base 12, the rail mounting seat 18 is docked with the rail mounting seat 18, the magnetic components are docked with the magnetic components, and the rail body 21 is docked with the rail body 21.
  • the linearity of the stator unit after docking should be guaranteed to reduce the unstable operation of the linear motor.
  • a plurality of stator units are spliced together, which effectively extends the length of the linear motor to meet the requirements for long strokes.
  • the base 12, the magnetic component, the guide rail mounting seat 18 and the guide rail body 21 are arranged in a misaligned manner and in a complementary manner, which can effectively improve the connection strength of the stator unit and effectively improve the positioning accuracy of the multiple stator units. Linearity remains good.
  • the stator unit of this long-stroke linear motor is of modular design. Those skilled in the art can set the length of the long-stroke linear motor according to actual needs.
  • the stator unit includes a yoke 23 and two guide rail mounts 18 extending in the sliding direction.
  • the yoke 23 is provided on the plurality of mounting bars 17 and is located between the two rail mounting seats 18.
  • a yoke mounting surface 17a is provided on the central upper surface of each mounting bar 17.
  • the yoke 23 is fixed to the yoke mounting surface 17a.
  • the first end 25 of the two rail mounts 18 is flush, and the second end 26 is flush.
  • the double guide rail structure can provide more balanced support for the mover assembly, making the operation of the linear motor more stable.
  • both ends of the two guide rail mounts 18 are flush, which makes alignment between different stator units easier.
  • the number of the rail body 21 may be more.
  • the stator unit includes two bases 12 arranged parallel to the sliding direction. One end of each mounting bar 17 is fixed to one of the bases 12 and the other end is fixed to the other base 12.
  • the two bases 12 can provide a more balanced supporting force for the mounting bar 17 and the like, and make it easier to fix the stator unit to other equipment, and the level of the stator unit is higher.
  • the upper surface of the base 12 is provided with a first mounting groove 13 parallel to the sliding direction.
  • a stop 15 is provided at the opening of the first mounting groove 13.
  • the first fastening groove 13 is provided with a first fastener.
  • the stopper 15 forms a stop for the first fastener. In the unfastened state, the first fastener can slide along the first mounting groove 13. In this way, the user can adjust the first fastener to an appropriate position according to actual needs.
  • a second fastener is provided on the mounting bar 17 of the base 12, and the second fastener is connected to the first fastener.
  • the first fastener is a T-shaped nut 16.
  • the T-shaped nut 16 is pre-installed into the first mounting groove 13.
  • the longitudinal portion of the T-nut 16 is located in the opening formed by the two stop portions 15.
  • the second fastener is a screw. During installation, the screw is screwed into the T-nut 16 to form a tight connection.
  • the connection of this type of connection is firm and makes the installation and removal of the mounting bar 17 very easy.
  • the stator unit further includes reinforcing ribs 24.
  • the side surface of the base 12 is provided with a second mounting groove 14 parallel to the sliding direction.
  • the reinforcing ribs 24 are respectively inserted into the second mounting grooves 14 of the two bases 12 spliced together.
  • the reinforcing ribs 24 can effectively improve the connection strength between multiple stator units, and improve the installation accuracy of the long-stroke linear motor.
  • the first mounting groove 13 is located on the upper surface of the base 12.
  • the second mounting groove 14 is located on the side surface of the base 12.
  • the second mounting groove 14 has a similar structure to the first mounting groove 13.
  • the cross section of the rib 24 is T-shaped.
  • the longitudinal portion of the T shape is located between the openings formed by the two stop portions 15.
  • the longitudinal portion is provided with threaded holes.
  • the screw is installed in the threaded hole.
  • the reinforcing ribs 24 are fixed to the two adjacent bases 12 by screws. This makes the position of the rib 24 more fixed, and the effect of improving the connection strength is more excellent.
  • the adjacent rail mounting bases 18 are fixedly connected by connecting plates.
  • the connecting plate 22 and two adjacent rail mounting seats 18 are fixed together by screws.
  • This connection method has high assembly accuracy, firm connection and easy disassembly.
  • the first end 25 of the rail mount 18 protrudes from the first end 25 of the base 12.
  • the first end 25 of the magnetic circuit assembly is retracted from the first end 25 of the base 12.
  • the first end 25 of the rail body 21 is retracted from the first end 25 of the rail mounting seat 18.
  • the guide rail mounting base 18, the magnetic circuit assembly and the guide rail body 21 are all formed in a misaligned arrangement.
  • the three connection points are on different planes. When assembling, it needs to be positioned at three positions, which makes the positioning accuracy of the long-stroke linear motor higher.
  • a mounting bar 17 is suspended below the first end 25 of the rail mounting base 18.
  • An installation position is provided at the second end 26 of the base 12. The mounting position is used to install another mounting bar 17 of the stator unit suspended above the ground.
  • the mounting bar 17 is fixed to the mounting position, which increases the connection points between adjacent stator units, further improving the connection strength.
  • the base 12, the mounting bar 17, the rail mounting seat 18, and the rail body 21 are processed to a set size.
  • each of the above-mentioned parts reserves a set machining allowance.
  • the stator unit is further processed by the machine tool. The method of assembling and then processing the dimensions enables the dimensions of the stator unit to be more accurate. Compared with the method of first processing into a set size and then assembling, this method can effectively reduce the errors caused by the assembly process and make the processing accuracy of the stator unit higher.
  • the surfaces to be processed include: a first mounting surface 19, a guide rail positioning side surface 19a, a magnetic grid mounting surface, a yoke mounting surface 17a, a base bottom surface 12a, and the like.
  • the dimensional accuracy H1 of the yoke mounting surface 17a to the base bottom surface 12a should be ensured to prevent thrust fluctuations caused by uneven air gaps of the linear motor;
  • the accuracy A of the second mounting surface 27a is ensured to prevent the position deviation caused by the splicing of the two rail mounting seats 18, which affects the flatness of the magnetic scale 27 and thus affects the accuracy of the reading head signal.
  • the plurality of stator units includes a first stator unit and a second stator unit. At least two of the base 12, the magnetic assembly, the guide rail mounting seat 18, and the guide rail body 21 of the first stator unit are disposed at the first end 25 in a misaligned manner. At least two of the base 12, the rail mounting seat 18, and the rail body 21 of the second stator unit are misaligned at the second end 26 in a manner complementary to the first end 25 of the first stator unit. The first end 25 of the first stator unit is spliced together with the second end 26 of the second stator unit.
  • the total lengths of the bases 12, the magnetic components, the guide rail mount 18, and the guide rail body 21 of the two stator units are the same.
  • Complementary means that the first end 25 of one part of the first assembly protrudes from the end face of the first end 25 of the other part, then the second end 26 of the part of the second assembly is retracted from the other part The end face of the second end 26.
  • the linear motor has high installation accuracy, high structural strength, and easy disassembly and assembly.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Linear Motors (AREA)

Abstract

一种长行程直线电机，包括拼接在一起的多个定子单元，定子单元包括底座（12）、安装条（17）、磁性组件、导轨安装座（18）和导轨本体（21），多个安装条（17）并排且相互间隔地被设置在底座（12）上，导轨安装座（18）和磁性组件被设置在多个安装条（17）上，导轨本体（21）被设置在导轨安装座（18）上，定子单元的底座（12）、磁性组件、导轨安装座（18）和导轨本体（21）中的至少两个在第一端（25）错位设置，并且在第二端（26）以与第一端（25）互补的方式错位设置，其中一个定子单元的第一端（25）与另一个定子单元的第二端（26）拼接在一起。

Description

长行程直线电机 技术领域
本发明涉及直线电机技术领域，更具体地，涉及一种长行程直线电机。
背景技术
目前，自动化产线大多用平皮带传输的方案来实现加工件的长距离传输。但是平皮带传送是由电机带动的。平皮带中间连接机构过于复杂，无法达到高效率、快速响应、高定位精度等性能要求。
直线电机的使用非常广泛。然而现有的直线电机的形成很短。在自动化产线上，由于工序繁多，故短行程的直线电机无法满足使用要求。
因此，需要提供一种新的技术方案，以解决上述技术问题。
发明内容
本发明的一个目的是提供一种长行程直线电机的新技术方案。
根据本发明的第一方面，提供了一种长行程直线电机。该直线电机包括拼接在一起的多个定子单元，所述定子单元包括底座、安装条、磁性组件、导轨安装座和导轨本体，多个安装条并排且相互间隔地被设置在所述底座上，所述导轨安装座和所述磁性组件被设置在所述多个安装条上，所述导轨本体被设置在所述导轨安装座上，计所述定子单元沿滑动方向的一端为第一端，另一端为第二端，所述定子单元的所述底座、所述磁性组件、所述导轨安装座和所述导轨本体中的至少两个在第一端错位设置，并且在第二端以与所述第一端互补的方式错位设置，其中一个所述定子单元的第一端与另一个所述定子单元的第二端拼接在一起。
可选地，包括磁轭以及沿滑动方向延伸的两条所述导轨安装座，所述磁轭被设置在所述多个安装条上并且位于两条所述导轨安装座之间，两条所述导轨安装座的第一端是平齐的，并且第二端是平齐的。
可选地，在所述导轨安装座的上表面设置有第一安装面，所述导轨本体被固定在所述第一安装面上；还包括磁栅尺，在导轨安装座的侧表面设置有第二安装面，所述磁栅尺被安装在第二安装面上。
可选地，包括平行于滑动方向并列设置的两个所述底座，每个所述安装条的一端固定在其中一个所述底座上，另一端固定在另一个所述底座上；所述底座的上表面设置有平行于滑动方向的第一安装槽，所述第一安装槽的开口处设置有止挡部，所述第一安装槽内设置有第一紧固件，所述止挡部对所述第一紧固件形成止挡，在未紧固状态时，所述第一紧固件能沿所述第一安装槽滑动，在所述底座安装条上设置有第二紧固件，所述第二紧固件与所述第一紧固件连接。
可选地，还包括加强筋，所述底座的侧表面设置有平行于滑动方向的第二安装槽，所述加强筋分别插接在相互拼接的两个所述底座的所述第二安装槽内。
可选地，相邻的所述导轨安装座通过连接板固定连接。
可选地，所述导轨安装座的第一端凸出于所述底座的第一端，所述磁路组件的第一端缩进于所述底座的第一端，所述导轨本体的第一端缩进于所述导轨安装座的第一端。
可选地，所述导轨安装座的第一端的下方悬空设置有一个所述安装条，在所述底座的第二端设置有一个安装位，所述安装位用于安装另一个定子单元悬空设置的安装条。
根据本公开的另一个方面，提供了一种长行程直线电机。该直线电机包括拼接在一起的多个定子单元，所述定子单元包括底座、安装条、磁性组件、导轨安装座和导轨本体，多个安装条并排且相互间隔地设置在所述底座上，所述导轨安装座和所述磁性组件设置在所述多个安装条上，所述导轨本体设置在所述导轨安装座上，计所述定子单元沿滑动方向的一端为第一端，另一端为第二端，所述多个定子单元包括第一定子单元和第二定子单元，其中所述第一定子单元的所述底座、所述磁性组件、所述导轨安装座和所述导轨本体中的至少两个在第一端错位设置，所述第二定子单元的所述底座、所述磁性组件、所述导轨安装座和所述导轨本体中的至少两 个在第二端以与所述第一定子单元的第一端互补的方式错位设置，所述第一定子单元的第一端与所述第二定子单元的第二端拼接在一起。
可选地，在所述定子单元组装完成后，将所述底座、所述安装条、所述导轨安装座和所述导轨本体加工成设定的尺寸。
根据本公开的一个实施例，该直线电机的结构牢固，定位精度高。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1是根据本公开的一个实施例的长行程直线电机的结构示意图。
图2是根据本公开的一个实施例的长行程直线电机的装配图。
图3是图2的局部放大图。
图4是根据本公开的一个实施例的定子单元的主视图。
附图标记说明：
12：底座；12a：底座底面；13：第一安装槽；14：第二安装槽；15：止挡部；16：T形螺母；17：安装条；17a：磁轭安装面；18：导轨安装座；19：第一安装面；19a：定位侧面导轨；21：导轨本体；22：连接板；23：磁轭；24：加强筋；25：第一端；26：第二端；27：磁栅尺；27a：第二安装面。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨 论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本公开的一个实施例，提供了一种长行程直线电机。该直线电机包括拼接在一起的多个定子单元。每个定子单元包括底座12、安装条17、磁性组件、导轨安装座18和导轨本体21。磁性组件用于形成磁场或者电磁场。例如，磁性组件为磁轭23。磁轭23包括导磁板和沿滑动方向并排设置的多个永磁体。多个永磁体固定在导磁板上。磁轭23形成磁场。直线电机的定子包括滑块和固定在滑块上的线圈组。线圈组与磁轭23相配合，并位于磁轭23的磁场中。
还可以是，磁路组件包括沿滑动方向并列设置的线圈组。定子组件包括滑块和设置在滑块上的永磁体。永磁体与线圈组相配合，对应的线圈位于永磁体的磁场中。滑动方向是指动子组件滑动时的方向，如图2中C所示。
如图1-2所示，多个安装条17并排且相互间隔地被设置在底座12上。导轨安装座18和磁性组件被设置在多个安装条17上。安装条17用于支撑导轨安装座18。导轨本体21被设置在导轨安装座18上。
例如，底座12、导轨安装座18、导轨本体21均呈线性结构，并且平行于滑动方向。安装条17呈条状结构。安装条17的长边与滑动方向垂直，以便于安装和定位。多个安装条17等间距设置。当然，安装条17也可以是与滑动方向呈其他角度。通过螺栓连接、卡接、铆接等方式分别将安装条17、导轨安装座18、导轨本体21进行固定。导轨本体21用于支撑动子组件，以使磁轭23与线圈组相间隔。
在导轨安装座18的上表面设置有第一安装面19。导轨本体21被固定在第一安装面19上。第一安装面19上还设置有导轨定位侧面19a。导轨 定位侧面19a用于定位导轨的位置，以使导轨本体21能够平行于滑动方向。
在导轨安装座18的侧表面设置有第二安装面27a。磁栅尺27被安装在第二安装面27a上。磁栅尺27与动子组件的读数头配合，以定位动子组件。
如图2所示，计定子单元沿滑动方向的一端为第一端25，另一端为第二端26。定子单元的底座12、磁性组件、导轨安装座18和导轨本体21中的至少两个在第一端25错位设置，并且在第二端26以与第一端25互补的方式错位设置。其中一个定子单元的第一端25与另一个定子单元的第二端26拼接在一起，如图1-3所示。
如图3所示，错位设置是指底座12、磁性组件、导轨安装座18和导轨本体21的至少两个的端面不在同一平面内，例如该平面垂直于滑动方向。例如，以其中一个零件的端面所在平面为基准，有的零件凸出于该平面，有的零件缩进于该平面。每个定子单元的底座12、磁性组件、导轨安装座18和导轨本体21的延伸方向平行于滑动方向。互补的方式是指如果其中一个零件的第一端25凸出于另一个零件的第一端25的端面所在的平面，则该零件的第二端26缩进于另一个零件的第二端26的端面；如果其中一个零件的第一端25缩进于另一个零件的第一端25的端面所在的平面，则该零件的第二端26凸出于另一个零件的第二端26的端面，以形成互补。
在安装时，不同定子单元的底座12与底座12对接、导轨安装座18与导轨安装座18对接、磁性组件与磁性组件对接、导轨本体21与导轨本体21对接。应保证对接之后定子单元的线性度，以减小直线电机的运行不平稳。
在本公开的实施例中，多个定子单元拼接在一起，有效延长了直线电机的长度，以达到长行程的使用要求。
此外，底座12、磁性组件、导轨安装座18和导轨本体21错位设置以及互补的方式错位设置的方式，能够有效地提高定子单元的连接强度，并且使得多个定子单元的定位精度有效地提高，线性度保持良好。
该长行程直线电机的定子单元为模块化设计。本领域技术人员可以根据实际需要设置长行程直线电机的长度。
在一个例子中，如图1-2所示，定子单元包括磁轭23以及沿滑动方向延伸的两条导轨安装座18。磁轭23被设置在多个安装条17上并且位于两条导轨安装座18之间。例如，在每个安装条17的中部上表面设置有磁轭安装面17a。磁轭23被固定在磁轭安装面17a上。两条导轨安装座18的第一端25是平齐的，并且第二端26的是平齐的。双导轨的结构能够为动子组件提供更均衡的支撑，使得直线电机的运行更稳定。
此外，两条导轨安装座18的两端是平齐的，这使得不同的定子单元之间的对准更加容易。
当然，导轨本体21的数量也可以为更多个。
在一个例子中，如图1-2所示，定子单元包括平行于滑动方向并列设置两个的底座12。每个安装条17的一端固定在其中一个底座12上，另一端固定在另一个底座12上。两个底座12能够为安装条17等提供更均衡的支撑力，并且使得定子单元更容易固定到其他设备上，定子单元的水平度更高。
底座12的上表面设置有平行于滑动方向的第一安装槽13。第一安装槽13的开口处设置有止挡部15。例如，止挡部15为两个并使得第一安装槽13形成口部收紧的结构。第一安装槽13内设置有第一紧固件。止挡部15对第一紧固件形成止挡。在未紧固状态时，第一紧固件能沿第一安装槽13滑动。这样，用户可以根据实际需要将第一紧固件的调整到合适的位置。在底座12安装条17上设置有第二紧固件，第二紧固件与第一紧固件连接。
例如，如图4所示，第一紧固件为T形螺母16。T形螺母16被预装到第一安装槽13中。T形螺母16的纵向部位于两个止挡部15形成的开口中。第二紧固件为螺钉。在安装时，将螺钉旋入T形螺母16中，从而形成紧固连接。这种连接方式的连接牢固并使得安装条17的拆、装十分容易。
在一个例子中，如图2-4所示，定子单元还包括加强筋24。底座12的侧表面设置有平行于滑动方向的第二安装槽14。加强筋24分别插接在相互拼接的两个底座12的第二安装槽14内。加强筋24能有效地提高多个定子单元之间的连接强度，并且提高长行程直线电机的安装精度。
例如，如图4所示，第一安装槽13位于底座12的上表面。第二安装 槽14位于底座12的侧表面。第二安装槽14具有与第一安装槽13相似的结构。加强筋24的横截面呈T字形。T字形的纵向部位于两个止挡部15形成的开口之间。纵向部设置有螺纹孔。螺钉安装在螺纹孔中。通过螺钉将加强筋24固定在相邻的两个底座12上。这使得加强筋24的位置更固定，提高连接强度的效果更优良。
在一个例子中，如图2-3所示，相邻的导轨安装座18通过连接板固定连接。例如，通过螺钉将连接板22与相邻的两个导轨安装座18固定在一起。这种连接方式的装配精度高、连接牢固、拆装容易。
在一个例子中，如图3所示，导轨安装座18的第一端25凸出于底座12的第一端25。磁路组件的第一端25缩进于底座12的第一端25。导轨本体21的第一端25缩进于导轨安装座18的第一端25。
在该例子中，导轨安装座18、磁路组件和导轨本体21均形成错位设置。三个连接点位于不同的平面。在进行组装时，需要在三个位置进行定位，这使得长行程直线电机的定位精度更高。
在一个例子中，如图3所示，导轨安装座18的第一端25的下方悬空设置有一个安装条17。在底座12的第二端26设置有一个安装位。安装位用于安装另一个定子单元悬空设置的安装条17。在该例子中，安装条17被固定到安装位，这样增加了相邻的定子单元之间的连接点，进一步提高了连接强度。
在一个例子中，如图3-4所示，在定子单元组装完成后，将底座12、安装条17、导轨安装座18和导轨本体21加工成设定的尺寸。例如，在进行组装之前，上述各个零件预留出设定的加工余量。待组装完成后，通过机床将定子单元进一步加工。先组装再加工尺寸的方式使得定子单元的尺寸能够更准确。与先加工成设定尺寸再进行组装的方式相比，这种方式能够有效地减少组装过程造成的误差，使得定子单元的加工精度更高。
例如，如图4所示，需要进行加工的表面包括：第一安装面19、导轨定位侧面19a、磁栅安装面、磁轭安装面17a、底座底面12a等。
在加工时，应当保证磁轭安装面17a至底座底面12a的尺寸精度H1，以防止因直线电机行走气隙不均匀造成推力波动；
保证第一安装面19的高度H2、导轨定位侧面19a精度B，防止导轨本体21的拼接不良，影响直线电机的动子组件运行的精度；
保证第二安装面27a的精度A，防止两个导轨安装座18拼接造成位置偏差，影响磁栅尺27的平面度，从而影响读数头信号精度。
根据本公开的另一个实施例，如图1-3所示，多个定子单元包括第一定子单元和第二定子单元。其中第一定子单元的底座12、磁性组件、导轨安装座18和导轨本体21中的至少两个在第一端25错位设置。第二定子单元的底座12、导轨安装座18和导轨本体21中的至少两个在第二端26以与第一定子单元的第一端25互补的方式错位设置。第一定子单元的第一端25与第二定子单元的第二端26拼接在一起。
在该例子中，拼接在一起后，两个定子单元的底座12、磁性组件、导轨安装座18和导轨本体21的各自的总长度相同。互补的方式是指第一组件的其中一个零件的第一端25凸出于另一个零件的第一端25的端面，则第二组件的该零件的第二端26缩进于该另一个零件的第二端26的端面。
该直线电机的安装精度高，结构强度高，并且拆、装容易。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (10)

  1. 一种长行程直线电机，包括拼接在一起的多个定子单元，所述定子单元包括底座、安装条、磁性组件、导轨安装座和导轨本体，多个安装条并排且相互间隔地被设置在所述底座上，所述导轨安装座和所述磁性组件被设置在所述多个安装条上，所述导轨本体被设置在所述导轨安装座上，计所述定子单元沿滑动方向的一端为第一端，另一端为第二端，所述定子单元的所述底座、所述磁性组件、所述导轨安装座和所述导轨本体中的至少两个在第一端错位设置，并且在第二端以与所述第一端互补的方式错位设置，其中一个所述定子单元的第一端与另一个所述定子单元的第二端拼接在一起。
  2. 根据权利要求1所述的长行程直线电机，其中，包括磁轭以及沿滑动方向延伸的两条所述导轨安装座，所述磁轭被设置在所述多个安装条上并且位于两条所述导轨安装座之间，两条所述导轨安装座的第一端是平齐的，并且第二端是平齐的。
  3. 根据权利要求1所述的长行程直线电机，其中，在所述导轨安装座的上表面设置有第一安装面，所述导轨本体被固定在所述第一安装面上；
    还包括磁栅尺，在导轨安装座的侧表面设置有第二安装面，所述磁栅尺被安装在第二安装面上。
  4. 根据权利要求1所述的长行程直线电机，其中，包括平行于滑动方向并列设置的两个所述底座，每个所述安装条的一端固定在其中一个所述底座上，另一端固定在另一个所述底座上；所述底座的上表面设置有平行于滑动方向的第一安装槽，所述第一安装槽的开口处设置有止挡部，所述第一安装槽内设置有第一紧固件，所述止挡部对所述第一紧固件形成止挡，在未紧固状态时，所述第一紧固件能沿所述第一安装槽滑动，在所述底座安装条上设置有第二紧固件，所述第二紧固件与所述第一紧固件连接。
  5. 根据权利要求1所述的长行程直线电机，其中，还包括加强筋，所述底座的侧表面设置有平行于滑动方向的第二安装槽，所述加强筋分别插接在相互拼接的两个所述底座的所述第二安装槽内。
  6. 根据权利要求1-5中的任意一项所述的长行程直线电机，其中，相邻的所述导轨安装座通过连接板固定连接。
  7. 根据权利要求1-5中的任意一项所述的长行程直线电机，其中，所述导轨安装座的第一端凸出于所述底座的第一端，所述磁路组件的第一端缩进于所述底座的第一端，所述导轨本体的第一端缩进于所述导轨安装座的第一端。
  8. 根据权利要求7所述的长行程直线电机，其中，所述导轨安装座的第一端的下方悬空设置有一个所述安装条，在所述底座的第二端设置有一个安装位，所述安装位用于安装另一个定子单元悬空设置的安装条。
  9. 一种长行程直线电机，包括拼接在一起的多个定子单元，所述定子单元包括底座、安装条、磁性组件、导轨安装座和导轨本体，多个安装条并排且相互间隔地设置在所述底座上，所述导轨安装座和所述磁性组件设置在所述多个安装条上，所述导轨本体设置在所述导轨安装座上，计所述定子单元沿滑动方向的一端为第一端，另一端为第二端，所述多个定子单元包括第一定子单元和第二定子单元，其中所述第一定子单元的所述底座、所述磁性组件、所述导轨安装座和所述导轨本体中的至少两个在第一端错位设置，所述第二定子单元的所述底座、所述磁性组件、所述导轨安装座和所述导轨本体中的至少两个在第二端以与所述第一定子单元的第一端互补的方式错位设置，所述第一定子单元的第一端与所述第二定子单元的第二端拼接在一起。
  10. 根据权利要求1-5以及10中的任意一项所述的长行程直线电机，其中，在所述定子单元组装完成后，将所述底座、所述安装条、所述导轨安装座和所述导轨本体加工成设定的尺寸。
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