阅读说明：本技术 直线电机 (Linear motor ) 是由 庞剑华 刘东成 曾祥雨 张晋 于 2018-06-27 设计创作，主要内容包括：本发明提供了一种直线电机,该直线电机包括电机框架、固定于电机框架两侧的多个导向轴、依次排列于电机框架内的多个定子板、以及夹设于相邻定子板之间的动子板,定子板包括多个阵列分布的磁铁,动子板包括与磁铁作用产生磁场的多个线圈、以及固定于板体两侧的导向块,导向轴穿设于导向块中并与导向块滑动连接。本发明提供的直线电机,通过在动子板的板体两侧设置导向块、并在电机框架两侧固定设置导向轴,使板体带动导向块在导向轴上滑动,该种导向结构所占用的体积较小；另外,定子板和动子板依次排列,极大地节约了空间,减小了电机框架的大小。(The invention provides a linear motor which comprises a motor frame, a plurality of guide shafts fixed on two sides of the motor frame, a plurality of stator plates arranged in the motor frame in sequence, and a rotor plate clamped between adjacent stator plates, wherein each stator plate comprises a plurality of magnets distributed in an array manner, each rotor plate comprises a plurality of coils which act with the magnets to generate a magnetic field, and guide blocks fixed on two sides of a plate body, and the guide shafts are arranged in the guide blocks in a penetrating manner and are connected with the guide blocks in a sliding manner. According to the linear motor provided by the invention, the guide blocks are arranged on the two sides of the plate body of the rotor plate, and the guide shafts are fixedly arranged on the two sides of the motor frame, so that the plate body drives the guide blocks to slide on the guide shafts, and the guide structure occupies a small volume; in addition, the stator plates and the rotor plates are sequentially arranged, so that the space is greatly saved, and the size of the motor frame is reduced.)

1. Linear electric motor, its characterized in that: including the motor frame, be fixed in a plurality of guiding axles of motor frame both sides, arrange in proper order in a plurality of stator boards in the motor frame and press from both sides and locate adjacently the active cell board between the stator board, the stator board includes the magnet of a plurality of array distributions, the active cell board includes the plate body, be fixed in on the plate body and with a plurality of coils that the magnet effect produced magnetic field and be fixed in the guide block of plate body both sides, the guiding axle wear locate in the guide block and with guide block sliding connection.

2. A linear motor as recited in claim 1, wherein: the stator plate is characterized by further comprising a magnet frame with a plurality of square grooves and cover plates fixed on two sides of the magnet frame, wherein the magnets are arranged in the square grooves in a one-to-one correspondence mode, and are respectively clamped between the two cover plates.

3. A linear motor as recited in claim 1, wherein: the magnets are distributed in a two-dimensional array, and in each row of magnets, the magnetic poles of the adjacent magnets on one side facing the same moving plate are opposite.

4. A linear motor as recited in claim 3, wherein: the plate body is provided with a plurality of coil grooves, the coil grooves are distributed in a two-dimensional array, and the coils are arranged in the coil grooves in a one-to-one correspondence mode.

5. A linear motor as recited in claim 1, wherein: and a ball linear bearing is arranged between the guide block and the guide shaft.

6. A linear motor as recited in claim 1, wherein: cushion pads are sleeved at two ends of the guide shaft.

7. A linear motor according to any one of claims 1 to 6, wherein: the motor frame comprises an upper frame, a lower frame and two side plates arranged between the upper frame and the lower frame, and two ends of the guide shaft are respectively fixed on the upper frame and the lower frame.

8. A linear motor as recited in claim 7, wherein: the inner wall of the upper frame and the inner wall of the lower frame are both provided with positioning grooves for inserting the stator plates.

9. A linear motor as recited in claim 7, wherein: the upper frame is fixed with a pressing strip for abutting against the stator plate, and the length direction of the pressing strip is the same as the thickness direction of the stator plate.

10. A linear motor as recited in claim 7, wherein: a notch is formed in one end of the guide shaft, the end of the guide shaft extends into the lower frame, a fastening hole is further formed in the side wall of the lower frame, and a steel ball screw which is abutted to the side wall of the notch is arranged in the fastening hole.

Technical Field

The invention belongs to the technical field of textile equipment, and particularly relates to a linear motor.

Background

Weaving is a key link in the textile manufacturing industry, a loom is widely applied in the textile industry, the loom comprises five movements of shedding, weft insertion, beating-up, reeling and warp let-off, wherein a shedding mechanism for controlling shedding movement is used for separating warps up and down to form sheds for weft insertion. The shedding mechanism is a key structure for controlling the movement of the loom, and the working performance of the shedding mechanism directly influences the production aperture of the loom, the product adaptability and the fabric quality. The common opening mechanisms on the market are mainly: cam shedding mechanism, connecting rod shedding mechanism, dobby shedding mechanism and jacquard shedding mechanism. Accordingly, each shedding mechanism has its limitations and disadvantages, such as multiple-arm shedding mechanisms, which are complicated, require high manufacturing precision, have too thin parts, are subject to high impact forces, and are difficult to maintain.

At present, companies are in research on servo drive weaving heald frame shedding mechanisms abroad, but because servo drive has the characteristic of converting motor rotary motion into linear motion, the servo drive weaving heald frame overall mechanism is relatively complex, easy to damage, large in size, low in efficiency, and incapable of meeting production requirements, along with the increase of requirements of customized, small-batch and multi-colored woven fabrics, an intelligent shedding machine which can replace traditional shedding structures such as a multi-arm shedding mechanism is urgently needed in the market, the shedding mechanism driven by a linear motor is produced at first, but the existing linear motor cannot be installed in a limited space with the center distance of the heald frame of a loom being only 12 millimeters due to the fact that the linear motor is additionally provided with a linear guide rail for guiding.

Disclosure of Invention

The invention aims to provide a linear motor to solve the technical problem that the linear motor in the prior art is too large in size and cannot be installed in a limited space.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a linear motor, including motor frame, be fixed in a plurality of guiding axles of motor frame both sides, arrange in proper order in a plurality of stator boards in the motor frame and press from both sides and locate adjacently the active cell board between the stator board, the stator board includes the magnet of a plurality of array distributions, the active cell board package rubbing board body, be fixed in on the plate body and with a plurality of coils that the magnet effect produced magnetic field and be fixed in the guide block of plate body both sides, the guiding axle wear locate in the guide block and with guide block sliding connection.

Further, the stator plate further comprises a magnet frame with a plurality of square grooves and cover plates fixed on two sides of the magnet frame, wherein the magnets are arranged in the square grooves in a one-to-one correspondence mode, and the magnets are arranged between the cover plates in a clamping mode.

Further, the magnets are distributed in a two-dimensional array, and in each row of the magnets, the magnetic poles of the adjacent magnets on one side facing the same moving plate are opposite.

Furthermore, a plurality of coil grooves are formed in the plate body, the coil grooves are distributed in a two-dimensional array, and the coils are arranged in the coil grooves in a one-to-one correspondence manner.

Further, a ball linear bearing is arranged between the guide block and the guide shaft.

Furthermore, cushion pads are sleeved at two ends of the guide shaft.

Further, the motor frame comprises an upper frame, a lower frame and two side plates arranged between the upper frame and the lower frame, and two ends of the guide shaft are respectively fixed on the upper frame and the lower frame.

Furthermore, the inner wall of the upper frame and the inner wall of the lower frame are both provided with positioning grooves for inserting the stator plates.

Furthermore, the upper frame is fixed with a pressing strip for abutting against the stator plate, and the length direction of the pressing strip is the same as the thickness direction of the stator plate.

Furthermore, one end of the guide shaft is provided with a gap, the end of the guide shaft extends into the lower frame, the side wall of the lower frame is also provided with a fastening hole, and a steel ball screw which is abutted to the side wall of the gap is arranged in the fastening hole.

The linear motor provided by the invention has the beneficial effects that: compared with the prior art, the linear motor has the advantages that the guide blocks are arranged on the two sides of the plate body of the rotor plate, the guide shafts are fixedly arranged on the two sides of the motor frame, and the plate body drives the guide blocks to slide on the guide shafts, so that the heald frame is driven to move; in addition, the stator plates are sequentially arranged in the motor frame, and the rotor plate is clamped between the two stator plates, so that the arrangement mode greatly saves space, reduces the size of the motor frame and enables the motor frame to be installed in an opening mechanism of a loom.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective structural view of a linear motor according to an embodiment of the present invention;

fig. 2 is a partial perspective structural view of a linear motor according to an embodiment of the present invention;

fig. 3 is a perspective structural view of a stator plate according to an embodiment of the present invention;

fig. 4 is an exploded view of a stator plate according to an embodiment of the present invention;

fig. 5 is a perspective structural view of the fender according to an embodiment of the present invention;

fig. 6 is a perspective structural view of an upper frame according to an embodiment of the present invention;

fig. 7 is a plan view of a linear motor according to an embodiment of the present invention;

fig. 8 is a partial structural view of a guide shaft according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-a motor frame; 11-upper frame; 110-mounting holes; 111-positioning blocks; 1110-positioning grooves; 12-lower frame; 120-fastening holes; 13-side plate; 14-pressing strips; 15-guide shaft pressing plate; 2-a stator plate; 21-magnet frame; 210-square groove; 211-notch; 22-a magnet; 23-a cover plate; 3-a movable plate; 31-a plate body; 310-a coil slot; 32-a coil; 321-connecting the bus; 33-a guide block; 330-a through hole; 34-parallel outlet plates; 4-a guide shaft; 41-notch; 5-a buffer pad; 6-magnetic grid ruler reading head.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 and 2 together, a linear motor according to the present invention will now be described. The linear motor is used in mechanisms such as looms. For example, the linear motor is used in shedding mechanisms in looms to drive the motion of heald frames. The linear motor comprises a motor frame 1, a guide shaft 4, a stator plate 2 and a rotor plate 3. The number of the stator plates 2 is plural, and the stator plates 2 are sequentially arranged in the motor frame 1 and fixed on the motor frame 1, in this embodiment, the stator plates 2 are vertically arranged, and the stator plates 2 are parallel to each other. The stator plate 2 includes a plurality of magnets 22, and the magnets 22 are arranged in an array. The movable plate 3 is clamped between two adjacent stator plates 2, the movable plate 3 comprises a plate body 31 and a coil 32 fixed on the plate body 31, the coil 32 on the movable plate 3 interacts with the magnet 22 to generate a magnetic field, and the magnetic field drives the movable plate 3 to move up and down, so that the movable plate 3 drives the heald frames to move. Stator board 2 and active cell board 3 are all vertical sets up, and arrange in proper order according to stator board 2, active cell board 3, stator board 2, active cell board 3 … …'s mode, make this linear electric motor's structure compacter, greatly practiced thrift the space, reduced linear electric motor's volume. Guide blocks 33 are fixed on two sides of the plate body 31, and the guide shaft 4 penetrates through the guide blocks 33 and is connected with the guide blocks 33 in a sliding manner. More specifically, the guide blocks 33 are fixed to the left and right sides of the plate body 31, the guide shafts 4 are correspondingly vertically fixed to the left and right sides of the motor frame 1, and the guide devices are installed using the spaces on both sides of the motor frame 1, thereby increasing the space utilization rate. The number of guide blocks 33 is equal to the number of guide shafts 4. Moreover, the two sides of the rotor plate 3 are provided with the guide blocks 33 and the guide shafts 4, so that the motion of the rotor plate 3 is more stable. When the plate body 31 of the rotor plate 3 moves, the guide block 33 moves along with the plate body, the guide block 33 slides longitudinally on the guide shaft 4, and the guide shaft 4 ensures the smooth movement of the guide block 33, so that the manufacturing precision is improved. The number of the stator plates 2 and the mover plates 3 is not limited herein, and the number of the stator plates 2 is one more than the number of the mover plates 3, and may be selected according to the circumstances, for example, the number of the stator plates 2 is 17, and the number of the mover plates 3 is 16. This linear electric motor still includes the driver, the driver is arranged in the electric current of control brake plate 3 well coil 32, the steerable a plurality of brake plates 3 of driver are with a global motion, also can be to 3 independent control of one of them brake plate, realize weaving machine and select the needle, electromagnetic mechanical clutch complicated weak has been eliminated, the high-speed separation and reunion impact destructive power who does not have electromagnetic mechanical clutch in the messenger motor, and motor structure has greatly been simplified through driver direct drive, the wearing and tearing and the energy consumption of complicated machinery have been reduced. And the core algorithm can be put into a driver, so that the communication delay is less than 1 microsecond, the response speed is high, and the restriction of the communication delay on the high-speed movement of the opening mechanism is solved. And the stator plate 3 is driven by the matching mode of the coil 32 and the magnet 22, so that the generated noise is small, the noise pollution is reduced, and the working environment of a textile mill is improved.

Compared with the prior art, the linear motor provided by the invention has the advantages that the guide blocks 33 are arranged on the two sides of the plate body 31 of the rotor plate 3, the guide shafts 4 are fixedly arranged on the two sides of the motor frame 1, so that the plate body 31 drives the guide blocks 33 to slide on the guide shafts 4, the heald frame is driven to move, the guide device with the structure occupies a small volume, the two sides of the rotor plate 3 and the space in the motor frame 1 are fully utilized, and the volume of the linear motor is reduced; in addition, the stator plates 2 are sequentially arranged in the motor frame 1, and the rotor plate 3 is clamped between the two stator plates 2, so that the arrangement mode greatly saves space, reduces the size of the motor frame 1 and enables the motor frame to be installed in an opening mechanism of a loom.

Referring to fig. 3 and 4, as an embodiment of the linear motor according to the present invention, the stator plate 2 further includes a magnet frame 21 having a plurality of square slots 210, and cover plates 23 fixed to two sides of the magnet frame 21, the magnets 22 are correspondingly disposed in the square slots 210, and each magnet 22 is sandwiched between two cover plates 23. Stator board 2 includes magnet frame 21, two apron 23 and a plurality of magnet 22, and magnet frame 21 has a plurality of square grooves 210, and magnet 22 one-to-one locates in the square groove 210 for magnet 22 on the stator board 2 can supply two adjacent dynamic daughter boards 3 to use, thereby has reduced the quantity of magnet 22, has further reduced the shared space of this linear electric motor. The cover plates 23 on two sides of the magnet 22 provide mounting positions for the magnet 22, and the magnet 22 is attached to the cover plates 23, so that the stator plate 2 is higher in structural strength and more convenient to mount. Preferably, the thickness of the magnet frame 21 is the same as that of the magnet 22, so that the cover plate 23 is bonded to both the magnet 22 and the magnet frame 21. The cover plate 23 is made of a non-magnetic material to avoid influencing the magnetic field distribution between the stator plate 2 and the mover plate 3. Specifically, the cover plate 23 is made of nonmagnetic or weakly magnetic stainless steel, such as 316 stainless steel.

Referring to fig. 3 and 4, as an embodiment of the linear motor provided by the present invention, the magnets 22 are distributed in a two-dimensional array, and in each row of magnets 22, the magnetic poles of the adjacent magnets 22 facing the same stator plate 3 are opposite. The stator plate 2 has two rows of magnets 22, and more specifically, the arrangement direction of each row of magnets 22 is a vertical direction. The two surfaces of the magnet 22 corresponding to the movable plate 3 are an N pole and an S pole, respectively, and the magnetic poles of two adjacent magnets 22 are opposite in the same row of magnets 22 facing the same movable plate 3, for example, the magnetic poles of one surface of the same row of magnets 22 facing the same movable plate 3 are an N pole, an S pole, an N pole, and an S pole … … in this order, as shown in fig. 4. The other row of magnets 22 has the same magnetic pole distribution as the row of magnets 22. This kind of magnetic pole mode of arranging can eliminate the magnetic attraction of orientation, avoids stator board 2 to warp, makes the mechanical mechanism of motor more stable. The number of magnets 22 is not limited here.

Referring to fig. 5, as an embodiment of the linear motor provided by the present invention, a plurality of coil slots 310 are formed on the plate 31, the coil slots 310 are distributed in a two-dimensional array, and the coils 32 are correspondingly disposed in the coil slots 310. The height of the plate body 31 is smaller than that of the stator plates 2 so that the rotor plate 3 freely moves up and down between the two stator plates 2. The coils 32 two-dimensional array on the stator board 2 distributes, and every row of equal vertical setting of coil 32, rather than one row of magnet 22 relative setting, so form bilateral coil 32, effectively utilize the inside space of motor frame 1, increase its thrust that receives. Meanwhile, the coils 32 are connected in parallel, a connecting bus 321 is formed between the two rows of coils 32, and the connecting bus 321 extends out of the board body 31 and is connected with a driver. The edge of the plate body 31 is provided with a parallel outlet plate 34, and the connecting bus 321 is arranged in the parallel outlet plate 34, so as to avoid the mutual friction between the connecting bus 321 and the stator plate 2, and protect the connecting bus 321. In this embodiment, the coil 32 is a coreless coil, which firstly forms a balanced dual magnetic track for the moving plate 3, so that the attraction force is not required to be processed during installation, thereby facilitating alignment and installation, secondly has no cogging effect, runs extremely smoothly, and thirdly reduces the weight of the moving plate 3, thereby achieving higher acceleration and higher mechanical bandwidth.

Referring to fig. 1 and 2, as an embodiment of the linear motor of the present invention, a ball linear bearing is disposed between the guide block 33 and the guide shaft 4, so that the movement of the guide block 33 is smoother, the movement displacement of the guide block 33 is more accurate, high-precision control of the heald frame is achieved, and friction between the guide block 33 and the guide shaft 4 can be reduced. Furthermore, the buffer pads 5 are sleeved at the two ends of the guide shaft 4, and when the guide blocks 33 move to the ends of the guide shaft 4, the buffer pads 5 can buffer the guide blocks 33, so that the motor frame 1 is prevented from colliding with the guide blocks 33 when the motor fails, and the reliability of the motor is improved.

Referring to fig. 1, as a specific embodiment of the linear motor provided by the present invention, a motor frame 1 includes an upper frame 11, a lower frame 12, and two side plates 13 disposed between the upper frame 11 and the lower frame 12, and two ends of a guide shaft 4 are respectively fixed to the upper frame 11 and the lower frame 12. Specifically, the stator plate 2 and the rotor plate 3 are parallel to the side plates 13 and are sequentially arranged between the two side plates 13. The positions of the two side plates 13 are set to the front side and the rear side, the guide blocks 33 are fixed to the left and right sides of the plate body 31, the guide shafts 4 are provided on the left and right sides of the motor frame 1, and the guide blocks 33 slide on the guide shafts 4 in the longitudinal direction. Both ends of the guide shaft 4 are respectively inserted into the upper frame 11 and the lower frame 12, so that the guide shaft 4 has a stable structure, and the sliding displacement between it and the guide block 33 is more accurate. Furthermore, the side plate 13 is further provided with a magnetic grid scale reading head 6 for detecting the sliding displacement of each guide block 33 and feeding back a displacement signal to the driver to form closed-loop control on the moving plate 3.

Referring to fig. 1, 6 and 7, as an embodiment of the linear motor according to the present invention, the inner walls of the upper frame 11 and the lower frame 12 are respectively provided with a positioning groove 1110 into which the stator plate 2 is inserted. Specifically, constant head tank 1110 has been seted up to the left and right sides of upper frame 11 inner wall, and constant head tank 1110 has also been seted up to the left and right sides of lower frame 12 inner wall, and the quantity of constant head tank 1110 is four times of stator plate 2 quantity, and during stator plate 2's upper end was inserted and is located upper frame 11's constant head tank 1110, stator plate 2's lower extreme was inserted and is located the constant head tank 1110 of lower frame 12, and constant head tank 1110 plays support, location and fixed action to stator plate 2. In another embodiment, a plurality of positioning blocks 111 are protruded from the inner walls of the upper frame 11 and the lower frame 12, the positioning blocks 111 are sequentially arranged on the left and right sides of the inner wall, and a positioning groove 1110 for positioning the stator plate 2 is formed between the adjacent positioning blocks 111.

Referring to fig. 1, 6 and 7, as an embodiment of the linear motor provided by the present invention, a pressing bar 14 for pressing the stator plate 2 is fixed to the upper frame 11, and a length direction of the pressing bar 14 is the same as a thickness direction of the stator plate 2. In this embodiment, the beads 14 are press-bonded to the upper sides of the respective stator plates 2, and the beads 14 and the stator plates 2 are perpendicular to each other. Of course, the lower side of the stator plate 2 may be provided with a pressing plate fixed to the lower frame 12. The provision of the pressure plate further enhances the structural strength of the stator plate 2. Preferably, the upper press plate is fixed to the positioning block 111. In another embodiment, the four corners of the magnet frame 21 are provided with notches 211, two side surfaces of the magnet frame 21 are inserted into the positioning slots 1110, and one side of the pressing plate abuts against the side walls of the notches 211, so that the structure of the motor frame 1 can be more compact.

Referring to fig. 1, 6 and 7, as an embodiment of the linear motor of the present invention, a pressing plate 15 of the guide shaft 4 is further fixed on the upper frame 11. The guide shaft 4 extends into the upper frame 11, the upper frame 11 is correspondingly provided with a mounting hole 110 for mounting the guide shaft pressing plate 15, and the guide shaft pressing plate 15 is abutted against the upper frame 11 and fixedly connected with the guide shaft 4 through fasteners such as bolts, so that the guide shaft 4 is fixed. Correspondingly, a guide shaft pressing plate 15 is also fixed on the lower frame 12.

Referring to fig. 1 and 8, as an embodiment of the linear motor according to the present invention, one end of the guide shaft is provided with a notch, and the end of the guide shaft extends into the lower frame, and a fastening hole is further formed in a side wall of the lower frame, and a steel ball screw abutting against the side wall of the notch is disposed in the fastening hole. The steel ball screw is fastened in the fastening hole, the end part of the steel ball screw is abutted with the notch of the guide shaft, and the guide shaft can bear larger bending moment under the abutting action of the steel ball screw. The dynamic plate has larger impact on the guide shaft when moving at high speed, and the notch of the guide shaft and the steel ball screw are matched with each other, so that the guide shaft can be prevented from being bent under long-term impact, and the service life of the guide shaft is prolonged.

The linear motor can be applied to a shedding mechanism of a loom, the shedding mechanism of the loom comprises heald frames and the linear motor in any embodiment, and the heald frames are correspondingly connected with the guide blocks 33 one by one. The through hole 330 is arranged on the lead block, the extending direction of the through hole 330 is the same as the length direction of the guide shaft 4, the steel rope passes through the through hole 330, and the steel rope is matched with the connecting mechanisms such as the pulley and the like to realize the connection of the steel rope and the heald frame, so that the movement of the guide block 33 drives the movement of the heald frame, a dobby, a heald lifting mechanism and the like are omitted, the structure is simple, and the maintenance is convenient.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.