阅读说明：本技术 一种初级铁芯交错式驱动结构、直线电机及数控设备 (Primary iron core staggered driving structure, linear motor and numerical control equipment ) 是由 郑立章 谢芳 焦雷 刘伟健 郜曦 张智超 赖奕霖 张海斌 刘建国 于 2019-09-12 设计创作，主要内容包括：本发明涉及一种初级铁芯交错式驱动结构、直线电机及数控设备,包括依次叠加设置的第一驱动组件和第二驱动组件,以及用于连接第一驱动组件和第二驱动组件的连接件；所述第一驱动组件和第二驱动组件构成直线驱动机构,且直线驱动机构至少具有一个。本发明中第一驱动组件和第二驱动组件依次交错叠加,可成倍增加铁芯的数量,且两个驱动组件在与动子运动方向垂直的方向上反向设置,使得初级铁芯在竖直方向上交错排布,不仅可以减小电机尺寸,还能有效地提高推力密度,降低直线电机的齿槽力,提高运行稳定性,另一方面,交错叠加的第一驱动组件和第二驱动组件还可以有效地抵消法向磁吸力。(The invention relates to a primary iron core staggered driving structure, a linear motor and numerical control equipment, which comprise a first driving component, a second driving component and a connecting piece, wherein the first driving component and the second driving component are sequentially overlapped; the first driving assembly and the second driving assembly form a linear driving mechanism, and the linear driving mechanism is provided with at least one linear driving mechanism. According to the linear motor, the first driving assemblies and the second driving assemblies are sequentially overlapped in a staggered mode, the number of the iron cores can be increased by times, the two driving assemblies are reversely arranged in the direction perpendicular to the moving direction of the rotor, so that primary iron cores are arranged in a staggered mode in the vertical direction, the size of the linear motor can be reduced, the thrust density can be effectively improved, the tooth socket force of the linear motor is reduced, the operation stability is improved, and on the other hand, the first driving assemblies and the second driving assemblies which are overlapped in a staggered mode can effectively offset the normal magnetic attraction force.)

1. A primary iron core staggered driving structure is characterized by comprising a first driving component (1), a second driving component (2) and a connecting piece (3), wherein the first driving component and the second driving component (2) are sequentially overlapped and arranged, and the connecting piece is used for connecting the first driving component and the second driving component; the adjacent first driving assembly and the second driving assembly form a linear driving mechanism, and the linear driving mechanism is provided with at least one linear driving mechanism; the first driving assembly and the second driving assembly respectively comprise a stator (11) and a mover (12) which is arranged on one side of the stator and is used for driving the movable object to move linearly along the stator; defining the motion direction of the rotor as an X-axis direction, and defining the direction vertical to the X-axis direction on a horizontal plane as a Y-axis direction, wherein the first driving assembly and the second driving assembly are reversely arranged in the Y-axis direction; and defining that one side where the stator of the first driving assembly is positioned is the negative direction of the Y-axis direction, one side where the rotor of the first driving assembly is positioned is the positive direction of the Y-axis direction, the stator of the second driving assembly is positioned in the positive direction of the Y-axis direction, and the rotor of the second driving assembly is positioned in the negative direction of the Y-axis direction.

2. The primary core staggered drive structure according to claim 1, wherein said mover (12) includes a primary core (121), a plurality of winding portions (123) disposed on a side of the primary core facing the stator, with a space between adjacent winding portions, each winding portion having a coil (122) wound thereon, and a permanent magnet (124) embedded in the winding portion.

3. The primary core staggered drive structure of claim 2, wherein said permanent magnets (124) have their two poles oriented in the same direction of the mover's motion.

4. The primary core staggered drive structure of claim 3, wherein said permanent magnets (124) are parallelogram shaped in cross section with acute angles.

5. The primary core staggered drive structure according to claim 3, wherein the permanent magnets of the first drive assembly (1) and the permanent magnets of the second drive assembly (2) are both arranged obliquely with respect to a horizontal plane, the permanent magnets of the first drive assembly and the permanent magnets of the second drive assembly are inclined in opposite directions, and an included angle between the permanent magnets of the first drive assembly and the permanent magnets of the second drive assembly at a corresponding position is less than 180 °.

6. The primary core staggered driving structure according to claim 2, wherein a is greater than or equal to 0 and less than or equal to L, assuming that the total length of the primary cores (121) and the winding parts (123) is L, and the distance between the end surface of the winding part of the second driving assembly (2) and the end surface of the primary core of the first driving assembly (1) facing the stator of the second driving assembly is a.

7. The primary core staggered drive structure according to claim 1, wherein said stator (11) comprises a secondary core (111) and a plurality of teeth (112) disposed on a mover-facing side of said secondary core.

8. The primary core interleaved drive structure according to claim 1, further comprising a filler (4) having a plurality of members for supporting a fixed stator (11); the connecting piece and the filling piece are made of non-ferromagnetic materials.

9. The primary core staggered drive structure according to claim 1, wherein the connecting member (3) comprises a partition plate (31) for partitioning the first drive assembly (1) and the second drive assembly (2), an upper connecting portion (32) provided on an upper end surface of the partition plate for fixing the mover of the second drive assembly, and a lower connecting portion (33) provided on a lower end surface of the partition plate for fixing the mover of the first drive assembly.

10. A linear motor comprising the primary core interleaved drive structure of any one of claims 1 to 9.

11. A numerical control apparatus comprising the linear motor according to claim 10.

Technical Field

The invention relates to the technical field of intelligent equipment machine tool linear driving feeding, in particular to a primary iron core staggered driving structure, a linear motor and numerical control equipment.

Background

The linear motor is also called a linear motor, a linear motor and a push rod motor, is a transmission device which directly converts electric energy into linear motion mechanical energy without any intermediate conversion mechanism, can be used for realizing linear transmission, positioning, guiding and the like, has the characteristics of high thrust density, high response speed, high system rigidity, simple structure and the like compared with a rotary motor, and is more and more widely applied to the fields of high-grade numerical control machines, high-speed rail transit, IT industrial equipment and the like. In order to improve the thrust density of the linear motor, the stacking size of a primary iron core can be increased generally, a permanent magnet is arranged below an iron core and serves as a stator, another iron core with an armature winding is arranged on the stator and serves as a rotor, and the normal suction force of the single-side linear motor is increased along with the increase of the stacking size, so that the operation stability of the linear motor is seriously influenced. The double-side linear motor (that is, the single-side linear motor is symmetrically arranged) improves thrust density by increasing the number of primary iron cores, although normal suction generated by a single iron core of the motor is mutually offset, the number of the active cells is at most 2, and because the two active cells are positioned on the same plane, the longitudinal size of the motor is doubled compared with the original size. There is also a method of increasing the thrust density by increasing the number of movers in the lateral and longitudinal directions, but the normal suction is multiplied in this method.

Disclosure of Invention

In order to solve the problems, the invention provides a primary iron core staggered driving structure which can multiply increase the number of iron cores and has high thrust density and good stability, and also provides a linear motor comprising the primary iron core staggered driving structure and a numerical control device comprising the linear motor.

The invention is realized by adopting the following scheme:

a primary iron core staggered driving structure comprises a first driving component, a second driving component and a connecting piece, wherein the first driving component and the second driving component are sequentially arranged in a stacked mode; the adjacent first driving assembly and the second driving assembly form a linear driving mechanism, and the linear driving mechanism is provided with at least one linear driving mechanism; the first driving assembly and the second driving assembly respectively comprise a stator and a mover which is arranged on one side of the stator and used for driving the movable object to move linearly along the stator; defining the motion direction of the rotor as an X-axis direction, and defining the direction vertical to the X-axis direction on a horizontal plane as a Y-axis direction, wherein the first driving assembly and the second driving assembly are reversely arranged in the Y-axis direction; and defining that one side where the stator of the first driving assembly is positioned is the negative direction of the Y-axis direction, one side where the rotor of the first driving assembly is positioned is the positive direction of the Y-axis direction, the stator of the second driving assembly is positioned in the positive direction of the Y-axis direction, and the rotor of the second driving assembly is positioned in the negative direction of the Y-axis direction.

Further, the active cell includes primary core, sets up in a plurality of wire winding portions of primary core towards one side of stator, has the interval between the adjacent wire winding portion, has all twined the coil in every wire winding portion, still has buried the permanent magnet underground in wire winding portion.

Further, the orientation of the two magnetic poles of the permanent magnet is consistent with the motion direction of the rotor.

Further, the cross section of the permanent magnet is a parallelogram, and the parallelogram has an acute angle.

Furthermore, the permanent magnet of the first driving assembly and the permanent magnet of the second driving assembly are arranged in an inclined mode relative to the horizontal plane, the permanent magnets of the first driving assembly and the permanent magnets of the second driving assembly incline in opposite directions, and an included angle formed between the permanent magnets of the first driving assembly and the permanent magnets of the second driving assembly at the corresponding positions is smaller than 180 degrees.

Further, if the total length of the primary iron core and the winding portion is L, and the distance between the end surface of the winding portion of the second driving assembly and the end surface of the primary iron core of the first driving assembly facing the stator of the second driving assembly is a, a is greater than or equal to 0 and less than or equal to L.

Further, the stator includes a secondary core and a plurality of teeth disposed on a side of the secondary core facing the mover.

Further, the primary core staggered driving structure further comprises a filler with a plurality of members for supporting and fixing the stator; the connecting piece and the filling piece are made of non-ferromagnetic materials.

Furthermore, the connecting piece includes the division board that is used for separating first drive assembly and second drive assembly, sets up the last connecting portion that is used for fixed second drive assembly's runner in division board up end, sets up the lower connecting portion that is used for fixed first drive assembly's runner in division board bottom end face.

A numerical control device comprises the linear motor.

Compared with the prior art, the invention has the following beneficial effects:

according to the linear motor, the first driving assemblies and the second driving assemblies are sequentially overlapped in a staggered mode, the number of the iron cores can be increased by times, the two driving assemblies are reversely arranged in the direction perpendicular to the moving direction of the rotor, so that primary iron cores are arranged in a staggered mode in the vertical direction, the size of the linear motor can be reduced, the thrust density can be effectively improved, the tooth socket force of the linear motor is reduced, the operation stability is improved, and on the other hand, the first driving assemblies and the second driving assemblies which are overlapped in a staggered mode can effectively offset the normal magnetic attraction force.

Drawings

Fig. 1 is a schematic structural diagram of a primary core staggered driving structure and a linear motor in embodiment 1 according to the present invention.

Fig. 2 is another schematic angle diagram of embodiment 1.

Fig. 3 is a schematic view of another state of fig. 1, in which the coil, the connecting member, and the filling member are hidden.

Fig. 4 is a schematic structural view of a connector in embodiment 1.

Fig. 5 is a schematic positional relationship diagram of the first drive assembly and the second drive assembly in embodiment 1.

Fig. 6 is a sectional view of the winding portion of the first drive unit and the second drive unit in embodiment 1.

Fig. 7 is a schematic view showing a superimposed structure of the first drive unit and the second drive unit according to embodiment 2, in which the connecting member and the filler member are hidden.

Detailed Description

To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.