CN213661411U

CN213661411U - Linear motor

Info

Publication number: CN213661411U
Application number: CN202021882602.1U
Authority: CN
Inventors: 郭顺; 史卫领; 郑高伟
Original assignee: Ruisheng Technology Nanjing Co Ltd
Current assignee: AAC Technologies Holdings Nanjing Co Ltd; Ruisheng Technology Nanjing Co Ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-07-09
Anticipated expiration: 2030-09-01
Also published as: WO2022047887A1

Abstract

The utility model provides a linear electric motor, it includes: the electric brush device comprises a sliding seat, a base connected with the sliding seat in a sliding mode, a primary assembly, a secondary assembly and a brush assembly, wherein the primary assembly and the brush assembly are fixed on one of the base and the sliding seat, and the secondary assembly is fixed on the other of the base and the sliding seat; the primary assembly comprises at least two groups of armature windings arranged at intervals and a connecting piece for connecting the two groups of armature windings, and the at least two groups of armature windings are used for generating traveling wave magnetic fields; a secondary assembly disposed opposite and spaced from the primary assembly, the secondary assembly including a plurality of spaced apart field windings; and the electric brush component is electrically conducted with the excitation winding corresponding to the primary component so as to enable the secondary component to generate an excitation magnetic field, and the traveling wave magnetic field and the excitation magnetic field interact to push the base or the sliding seat to slide along the sliding direction. The utility model provides a linear electric motor reduces the copper and consumes, operates more steadily.

Description

Linear motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to a driver technical field especially relates to a linear electric motor.

[ background of the invention ]

The linear motor is a driver for directly converting electric energy into mechanical energy of linear motion, and compared with the traditional driver, the linear motor can realize linear driving without a transmission structure, and has the advantages of simple structure, low loss, high precision and high efficiency.

A related art linear motor includes a primary driving assembly generally composed of a winding structure and a secondary driving assembly generally composed of a yoke and magnetic steel, and when the primary driving assembly is energized, a relative linear motion is generated between the primary driving assembly and the secondary driving assembly. The length of the secondary driving component is in direct proportion to the stroke of the linear driving motor, namely, the stroke of the linear driving motor is about long, the length of the secondary driving component is also long, so that the length (quantity) of the magnetic yoke and the magnetic steel is increased, and the cost of the magnetic yoke and the magnetic steel is high, so that the cost of the linear motor is increased. In addition, the linear motor is affected by thrust fluctuations while operating, thereby degrading performance.

Therefore, it is necessary to provide a new linear motor to solve the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a can reduce the undulant linear electric motor of thrust.

In order to achieve the above object, the present invention provides a linear motor, including: the electric brush device comprises a sliding seat, a base connected with the sliding seat in a sliding mode, a primary assembly, a secondary assembly and a brush assembly, wherein the primary assembly and the brush assembly are fixed on one of the base and the sliding seat, and the secondary assembly is fixed on the other of the base and the sliding seat; the primary assembly comprises at least two groups of armature windings arranged at intervals and a connecting piece for connecting the two groups of armature windings, and the at least two groups of armature windings are used for generating traveling wave magnetic fields; a secondary assembly disposed opposite and spaced from the primary assembly, the secondary assembly including a plurality of spaced apart field windings; and the electric brush component is electrically conducted with the excitation winding corresponding to the primary component so as to enable the secondary component to generate an excitation magnetic field, and the traveling wave magnetic field and the excitation magnetic field interact to push the base or the sliding seat to slide along the sliding direction.

Preferably, the primary assembly and the brush assembly are fixed to the carriage, the secondary assembly is fixed to the base, and the primary assembly and the secondary assembly are arranged opposite to and spaced from each other along a first direction perpendicular to the sliding direction; the primary assembly and the brush assembly are arranged opposite to each other at intervals along a second direction perpendicular to the sliding direction.

Preferably, the primary assembly and the brush assembly are fixed to the base, the secondary assembly is fixed to the carriage, and the primary assembly and the secondary assembly are arranged opposite to and spaced from each other along a first direction perpendicular to the sliding direction; the primary assembly and the brush assembly are arranged opposite to each other at intervals along a second direction perpendicular to the sliding direction.

Preferably, the primary assembly further comprises at least two armature cores fixed to the slide or the base, the armature cores are respectively connected to the armature windings, the connecting member connects two adjacent armature cores, and the connecting member is made of an insulating material.

Preferably, each armature core includes a first substrate fixed to the slider or the base, and the at least one armature coil is fixed to the first substrate.

Preferably, each armature core further includes at least one first tooth portion disposed on the first substrate, and the armature winding is sleeved on the first tooth portion.

Preferably, the brush assembly comprises at least two brush members, each brush member being spaced from and disposed opposite one of the armature windings.

Preferably, the brush member includes a first brush piece, a second brush piece and a fixing member connecting the first brush piece and the second brush piece to the sliding base or the base, and the first brush piece and the second brush piece are electrically connected to the corresponding excitation windings.

Preferably, each of the excitation windings includes a first outlet terminal and a second outlet terminal; the secondary assembly further comprises a plurality of first conductive blocks arranged at intervals and a plurality of second conductive blocks arranged at intervals, and the first conductive blocks are opposite to the second conductive blocks and arranged at intervals; each first wire outlet end is electrically connected with each first conductive block; each second wire outlet end is electrically connected with each second conductive block; the first electric brush piece is in contact with the corresponding first conductive block and is electrically conducted; the second brush piece is in contact with the corresponding second conductive block and is electrically conducted.

Preferably, the secondary assembly further comprises a plurality of first insulating members and a plurality of second insulating members, each first insulating member is connected between two adjacent first conductive blocks, and each second insulating member is connected between two adjacent second conductive blocks; the first insulating part and the second insulating part are arranged at intervals.

Preferably, the secondary assembly further comprises a field core including a second substrate fixed to the base or the slider, the plurality of field windings being fixed to the second substrate.

Preferably, the field core further includes a plurality of second tooth portions provided on the second substrate at intervals in the sliding direction, and the plurality of field windings are respectively sleeved on the plurality of second tooth portions.

Preferably, the linear motor further comprises a rail assembly slidably connecting the base and the carriage.

Preferably, the base includes the first plate body, certainly the backup pad that first plate body both sides were buckled and are extended and locate the backup pad is kept away from a first installation department that first plate body was served, the slide includes the second plate body and locates the second installation department of second plate body both sides, guide rail set spare including install respectively in first installation department with first guide rail and second guide rail on the second installation department, first guide rail with second guide rail slidable ground connects.

Preferably, the linear motor further comprises a detection assembly, the detection assembly comprises a grating ruler and a grating ruler reading head, the grating ruler is fixed on one of the base or the sliding seat, and the grating ruler reading head is fixed on the other of the sliding seat or the base and is arranged opposite to the grating ruler.

Compared with the prior art, the base and the sliding seat of the linear motor generate relative motion through the driving of the armature winding and the excitation winding, the material cost of the armature winding and the excitation winding is low, and the production cost of the linear motor is reduced; the brush assembly only conducts part of the excitation winding, so that the copper consumption of the linear motor is greatly reduced, and the efficiency of the linear motor is improved; two adjacent armature windings are connected through the connecting piece, so that the thrust fluctuation when the linear motor operates is reduced, and the linear motor operates more stably.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is an exploded schematic view of a linear motor according to the present invention;

fig. 2 is an exploded view of an armature core and an armature winding of a primary assembly of the linear motor shown in fig. 1;

fig. 3 is a schematic perspective view of the primary assembly and the carriage of the linear motor shown in fig. 1;

FIG. 4 is an exploded view of the sub-assembly of the linear motor of FIG. 1;

fig. 5 is a schematic perspective view of the linear motor shown in fig. 1;

fig. 6 is a schematic sectional view along the direction a-a in fig. 5.

Fig. 7 is an enlarged view of a portion B shown in fig. 5.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 7, a linear motor 100 according to an embodiment of the present invention includes a base 10, a guide rail 50, a slider 20, a primary assembly 30, a secondary assembly 40, and a brush assembly 70. The base 10 and the carriage 20 are slidably connected by a guide rail 50. The primary assembly 30 and the brush assembly 70 are secured to one of the base 10 and the carriage 20, and correspondingly, the secondary assembly 40 is secured to the other. The primary assembly 30 is used to generate a traveling wave magnetic field, the secondary assembly 40 is used to generate an excitation magnetic field, and the brush assembly 70 is used to supply current to the secondary assembly 40 corresponding to the primary assembly 30 to cause it to generate the excitation magnetic field when slid. The travelling wave magnetic field interacts with the excitation magnetic field to push the base 10 or the sledge 20 to slide relatively in the sliding direction X.

In this embodiment, the primary assembly 30 and the brush assembly 70 are both fixed to the carriage 20, and the secondary assembly 40 is fixed to the base 10. It will be appreciated that in other embodiments, the primary assembly 30 and the brush assembly 70 are both fixed to the base 10 and the secondary assembly 40 is fixed to the carriage 20.

Specifically, the base 10 is substantially U-shaped, and includes a first plate 11, a support plate 12 bent and extended from two sides of the first plate 11, and a first mounting portion 14 disposed at one end of the support plate 12 far away from the first plate 11. The sub-assembly 40 is fixed to the first substrate 11.

The sliding base 20 is substantially a plate, and includes a second plate 21 and second mounting portions 22 disposed on two sides of the second plate 21, and the primary assembly 30 and the brush assembly 70 are fixed to the second plate 21.

The rail assembly 50 includes a first rail 51 and a second rail 52 mounted to the first mounting portion 14 and the second mounting portion 22, respectively, and the first rail 51 and the second rail 52 are slidably coupled to slidably couple the base 10 and the carriage 20 together. The rail assembly 50 and the connected slide carriage 20 and the base 10 together enclose a receiving space 13. The secondary assembly 40 and the primary assembly 30 are accommodated in the accommodating space 13, and are opposite to each other along a first direction Z perpendicular to the sliding direction X and arranged at intervals. The brush assembly 70 is also accommodated in the accommodating space 13, and is opposed to and spaced apart from the primary assembly 30 along a second direction Y perpendicular to the sliding direction X.

The primary assembly 30 includes at least two armature cores 31 spaced apart along the sliding direction X, at least two armature windings 32 disposed on the armature cores 31, and a connecting member 33 connecting two adjacent armature cores 31. The connection member 33 is made of an insulating material. A distance from an end of a first primary assembly 30 to an end of a second primary assembly 30 adjacent thereto is d, specifically, in the present embodiment, a distance from an end of a first armature core 31 to an end of a second armature core 31 adjacent thereto is d; the end positioning force and thrust fluctuation of the linear motor 100 can be effectively reduced by adjusting the distance d. The number of the primary assemblies 31 may be two or more, and increasing the number of the primary assemblies 31 can reduce the thrust fluctuation of the linear motor 100, so that the linear motor 100 can operate more stably.

The armature core 31 includes a first substrate 311 having a substantially plate shape, first blocking plates 312 bent and extended from both ends of the first substrate 311, and a first tooth portion 313 provided between the two first blocking plates 312, and one side of the first substrate 311 away from the first tooth portion 313 is connected to the second plate 21.

The armature winding 32 includes an armature winding body 321 and a first through hole 322 surrounded by the armature winding body 321, and the armature winding 32 is sleeved on the first tooth portion 313 through the first through hole 322, or directly wound on the first tooth portion 313 through the armature winding body 321. The first teeth 3113 and the armature windings 312 are provided in the same number, and the number of the armature windings 312 can be increased according to the driving force required by the primary assembly 31.

It is understood that in other embodiments, the armature core may not be provided, or the armature core may not be provided with teeth.

The secondary assembly 40 is spaced from the primary assembly 30 along a first direction Z perpendicular to the sliding direction X to form an air gap 101. The sub-assembly 40 includes a field core 41, a plurality of field windings 42 provided on the field core 41, a plurality of first conductive blocks 43 and a plurality of second conductive blocks 44 electrically connected to the plurality of field windings 42, respectively, a first insulating member 45 connecting between two adjacent first conductive blocks 43, a second insulating member 46 connecting two adjacent second conductive blocks 44, a first connecting portion 47 connecting the first conductive blocks 43 and the first insulating member 45, and a second connecting portion 48 connecting the second conductive blocks 44 and the second insulating member 46. The plurality of field windings 42 are provided at intervals in the sliding direction X. The plurality of first conductive bumps 43 are disposed at intervals along the sliding direction X, the plurality of second conductive bumps 44 are disposed at intervals along the sliding direction X, and the first conductive bumps 43 and the second conductive bumps 44 are disposed at intervals along a second direction Y perpendicular to the sliding direction X. The first connecting portion 47 and the second connecting portion 48 are arranged in parallel in the sliding direction X. It is understood that in other embodiments, the first conductive block, the second conductive block, the first insulating member, the second insulating member, the first connecting portion, and the second connecting portion may not be provided.

The field core 41 includes a second base 411 having a substantially plate shape, second baffles 412 bent and extended from both ends of the second base 411, and a plurality of second teeth 413 provided between the two second baffles 412. One side of the second base plate 411, which is away from the second tooth portion 413, is connected to the first plate 11, and the plurality of excitation windings 42 are respectively sleeved or wound around the plurality of second tooth portions 413. The field windings 42 are provided in one-to-one correspondence with the second tooth portions 413.

Each excitation winding 42 includes an excitation winding body 421, a second through hole 422 surrounded by the excitation winding body 421, and a first outlet end 423 and a second outlet end 424 extending from the excitation winding body 421. Each first outlet end 423 is electrically connected to a first conductive block 43, and each second outlet end 424 is electrically connected to a second conductive block 44. The excitation winding 42 is sleeved on the second tooth portion 413 through the second through hole 422, or directly wound on the second tooth portion 413 through the excitation winding body 421. The plurality of first conductive bumps 43 are connected together by a first insulating member 45; the plurality of second conductive bumps 44 are connected together by a second insulating member 46. The first connection portion 47 and the second connection portion 48 are also made of an insulating material, the first connection portion 47 integrally connects the first conductive block 43 and the first insulating block 45 on the side away from the excitation winding body 421, the second connection portion 48 integrally connects the second conductive block 44 and the second insulating block 46 on the side away from the excitation winding body 421, and the first connection portion 47 and the second connection portion 48 are spaced from each other.

Sub-assembly 40 also includes a support 49. One side of the supporting member 49 is connected to the first plate 11, and the other side is connected to and supports the first wire outlet end 423, the second wire outlet end 424, and the first conductive block 43 and the second conductive block 44 electrically connected to the first wire outlet end 423 and the second wire outlet end 424, respectively. The first conductive block 43 and the second conductive block 44 are electrically connected to the brush assembly 70 at a side away from the support 49.

The brush assembly 70 includes at least two brush members 71, and the brush members 71 are fixed to the carriage 20. Each brush member 71 is opposed to and spaced apart from each armature core 31 in the second direction Y. Each brush member 71 includes a fixing member 711 fixedly coupled to the carriage 20, and a first brush piece 712 and a second brush piece 713 coupled to the fixing member 711. The fixing member 711 is substantially U-shaped, and includes a fixing body 7111, and a first fixing arm 7112 and a second fixing arm 7113 bent and extended from two sides of the fixing body 7111, wherein the fixing body 7111 is fixed to the second plate 21 and spaced apart from the primary assembly 30. The first brush blade 712 is substantially elongated and connected to the first fixed arm 7112, and the second brush blade 713 is connected to the second fixed arm 7113. When sliding, one end of the first brush piece 712, which is far away from the first fixing arm 712, is in contact with and electrically conducted with the corresponding first conductive block 43, and one end of the second brush piece 713, which is far away from the second fixing arm 7113, is in contact with and electrically conducted with the corresponding second conductive block 44, so as to supply current to the field winding 42. During operation, the armature winding 32 of the primary assembly 30 is connected to a power supply to generate a travelling wave magnetic field, then the first conductive member 72 and the second conductive member 73 of the brush assembly 70 are respectively connected to the positive electrode and the negative electrode of the power supply, the first outgoing line end 423 and the second outgoing line end 424 of the excitation winding 42 are respectively in contact with and electrically conducted with the first conductive member 72 and the second conductive member 73 through the first conductive block 43 and the second conductive block 44, so as to generate a stable excitation magnetic field, and finally, under the driving of the travelling wave magnetic field and the excitation magnetic field, the sliding base 20 performs a linear motion relative to the base 10 through the relative sliding of the first guide rail 51 and the second guide rail 52.

It should be noted that the first brush piece 712 and the second brush piece 713 slide along the sliding base 20 and electrically conduct the excitation winding 42 of the primary assembly 30 relative to the secondary assembly 40, and the excitation winding 42 that is not in contact with the first brush piece 712 and the second brush piece 713 is not connected to the power supply, so that the resource loss is reduced, the copper consumption of the linear motor 100 is greatly reduced, and the efficiency of the linear motor 100 is improved. Moreover, because two primary assemblies 30 are arranged at intervals, the end positioning force can be effectively reduced, and therefore the thrust fluctuation is reduced.

The linear motor 100 further comprises a detection assembly 90 for detecting the relative position of the base 10 and the carriage 20. The detecting assembly 90 includes a grating 92 and a grating reading head 91, the grating 92 is fixed on the base 10, and the grating reading head 91 is fixed on the sliding base 20 and is opposite to the grating 92. Otherwise, the grating ruler is fixed on the slide carriage 20, and the grating ruler reading head 91 is fixed on the base 10.

Compared with the prior art, the base and the sliding seat of the linear motor generate relative motion through the driving of the armature winding and the excitation winding, the material cost of the armature winding and the excitation winding is low, and the production cost of the linear motor is reduced; the conductive assembly only conducts part of the excitation winding, so that the copper consumption of the linear motor is greatly reduced, and the efficiency of the linear motor is improved; the arrangement of the at least two primary assemblies and the connecting piece for connecting the two primary assemblies at intervals reduces the thrust fluctuation when the linear motor runs, so that the linear motor runs more stably.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A linear motor, characterized in that the linear motor comprises:

the electric brush device comprises a sliding seat, a base connected with the sliding seat in a sliding mode, a primary assembly, a secondary assembly and a brush assembly, wherein the primary assembly and the brush assembly are fixed on one of the base and the sliding seat, and the secondary assembly is fixed on the other of the base and the sliding seat;

the primary assembly comprises at least two groups of armature windings arranged at intervals and a connecting piece for connecting the two groups of armature windings, and the at least two groups of armature windings are used for generating traveling wave magnetic fields;

a secondary assembly disposed opposite and spaced from the primary assembly, the secondary assembly including a plurality of spaced apart field windings;

and the electric brush component is electrically conducted with the excitation winding corresponding to the primary component so as to enable the secondary component to generate an excitation magnetic field, and the traveling wave magnetic field and the excitation magnetic field interact to push the base or the sliding seat to slide along the sliding direction.

2. A linear motor according to claim 1, the primary assembly and brush assembly being secured to the carriage, the secondary assembly being secured to the base, the primary assembly and secondary assembly being disposed opposite and spaced apart in a first direction perpendicular to the sliding direction; the primary assembly and the brush assembly are arranged opposite to each other at intervals along a second direction perpendicular to the sliding direction.

3. A linear motor according to claim 1, the primary assembly and brush assembly being secured to the base, the secondary assembly being secured to the carriage, the primary assembly and secondary assembly being disposed opposite and spaced from one another in a first direction perpendicular to the sliding direction; the primary assembly and the brush assembly are arranged opposite to each other at intervals along a second direction perpendicular to the sliding direction.

4. A linear motor according to claim 2 or 3, wherein the primary assembly further comprises at least two spaced armature cores fixed to the carriage or the base, the armature cores are respectively connected to the armature windings, and the connecting member connects two adjacent armature cores, and is made of an insulating material.

5. A linear motor according to claim 4, each armature core comprising a first base plate secured to the carriage or base, the at least one armature winding being secured to the first base plate.

6. The linear motor according to claim 5, wherein each of the armature cores further includes at least one first tooth portion provided on the first base plate, and the armature winding is disposed on the first tooth portion.

7. A linear motor according to claim 6, the brush assembly comprising at least two brush members, each brush member being spaced from and opposed to one of the armature windings.

8. A linear motor according to claim 7, wherein the brush member includes first and second brush segments electrically connected to the respective field windings, and a fixing member connecting the first and second brush segments to the carriage or base.

9. The linear motor of claim 8, wherein each of the field windings includes a first outlet terminal and a second outlet terminal; the secondary assembly further comprises a plurality of first conductive blocks arranged at intervals and a plurality of second conductive blocks arranged at intervals, and the first conductive blocks are opposite to the second conductive blocks and arranged at intervals; each first wire outlet end is electrically connected with each first conductive block; each second wire outlet end is electrically connected with each second conductive block; the first electric brush piece is in contact with the corresponding first conductive block and is electrically conducted; the second brush piece is in contact with the corresponding second conductive block and is electrically conducted.

10. The linear motor of claim 9, wherein the sub-assembly further comprises a plurality of first insulating members and a plurality of second insulating members, each first insulating member being connected between two adjacent first conductive blocks, each second insulating member being connected between two adjacent second conductive blocks; the first insulating part and the second insulating part are arranged at intervals.

11. The linear motor of claim 10, wherein the secondary assembly further includes a field core including a second base plate fixed to the base or slide, the plurality of field windings being fixed to the second base plate.

12. The linear motor according to claim 11, wherein the field core further includes a plurality of second tooth portions provided on the second base plate at intervals in the sliding direction, and the plurality of field windings are respectively fitted over the plurality of second tooth portions.

13. The linear motor of claim 1 further comprising a rail assembly slidably connecting the base and the carriage.

14. The linear motor according to claim 13, wherein the base includes a first plate, a support plate extending from both sides of the first plate in a bent manner, and a first mounting portion provided at one end of the support plate away from the first plate, the slide includes a second plate and second mounting portions provided at both sides of the second plate, the guide rail assembly includes a first guide rail and a second guide rail respectively mounted on the first mounting portion and the second mounting portion, and the first guide rail and the second guide rail are slidably connected.

15. The linear motor of claim 1, further comprising a detection assembly including a grid rule fixed to one of the base and the carriage and a grid rule reading head fixed to the other of the carriage and the base and disposed opposite the grid rule.