CN201904712U

CN201904712U - DC linear motor with light weight and large thrust force

Info

Publication number: CN201904712U
Application number: CN2010206756664U
Authority: CN
Inventors: 王利强; 周喜; 董欣
Original assignee: Tianjin University of Technology
Current assignee: Tianjin University of Technology
Priority date: 2010-12-23
Filing date: 2010-12-23
Publication date: 2011-07-20
Anticipated expiration: 2020-12-23

Abstract

The utility model discloses a light DC linear motor. The linear motor comprises a housing, main magnetic steel, an iron core, an armature framework, an armature coil and a base, wherein the housing is made of polyformaldehyde material; thin-layer soft iron is inlaid on the inner wall of the housing; the iron core is positioned at the center of the housing; the central part of the iron core is hollow; the thin-layer magnetic steel clings to the outer wall of the iron core; the central part of the base extends into the bottom of the iron core; the bottom of the base, the bottom of the iron core and the bottom of the thin-layer soft iron are connected with each other; the armature framework is provided with a hollow cylinder; grooves are formed at one end of the outer side of the armature framework; and metal wires are wound on the end of the outer side of the armature framework. The linear motor disclosed by the utility model has the characteristics of light weight, simple structure, large thrust force, and the like.

Description

A kind of light weight, high thrust DC linear electric motor

Technical field

The utility model belongs to the linear electric motors field, particularly relates to a kind of DC linear electric motor device of in light weight, high thrust.

The background technology formula

DC linear electric motor is a kind of electric energy to be directly changed into rectilinear motion mechanical energy, and without any need for the transmission device of intermediate conversion mechanism, its utilizes armature coil and the magnetic field interaction that is put in the magnetic field, produces Ampere force, promotes the armature coil back and forth movement.DC linear electric motor has following characteristics: movement conversion is straight-line process without spin, has realized " directly driving " or " zero transmission "; The armature light weight is quick on the draw, and dynamic response is very good; The armature skeleton is a non-magnetizer, has eliminated intrinsic armature of magneto and suction between the magnetic pole, has reduced starting resistor; Overall structure is simple, and good heat dissipation effect can be applied to the high occasion of heat load; Armature and magnetic pole are contactless, the nothing wearing and tearing, and running noises is extremely low.

U.S. Smac company has released LAS series DC linear electric motor, Singapore BEI company and U.S. USAS company have also released LA series VLR series DC linear electric motor respectively, all there are drawbacks such as volume is big, heaviness in the linear electric motors product of above-mentioned manufacturer production, has limited its range of application.

Chinese patent publication number CN101068090A, open day on November 7th, 2007, the name of innovation and creation is called a kind of DC linear voice coil motor, this application case discloses a kind of voice coil motor structure, comprises iron-clad, iron core, voice coil suspension, enameled wire loop, annular magnetic steel or tile-shaped magnet steel group and cylindrical magnet steel.Also there is big this defective of weight in the DC linear voice coil motor of this scheme, brings inconvenience in actual use.

The weight of DC linear electric motor is mainly from iron core, magnet steel, shell three parts, start with from these three members, alleviating single construction weight, and adopt high strength, low-gravity new material to substitute traditional manufactured materials of motor, is an effective way that realizes the motor lightness.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of light weight, high thrust DC linear electric motor, this DC linear electric motor comprises shell, main magnet steel, iron core, armature skeleton, armature coil and base, adopt low-gravity, high-intensity model engineering plastic to make motor housing, and the improvement core structure, this DC linear electric motor has characteristics in light weight, simple in structure, that thrust is big.

The utility model is achieved by following technical proposals:

The utility model comprises shell, main magnet steel, iron core, armature skeleton, armature coil and base; The material of shell is a polyformaldehyde, and the thin layer soft iron is embedded on the inwall of shell; Iron core is positioned at the center of shell, and core center partly is a hollow, and the thin layer magnet steel is close to the iron core outer wall; Radially, the external magnetic poles of thin layer magnet steel and main magnet steel interior permanent magnet are opposite; The core of base extend into the bottom of iron core, and the bottom of base and iron core, the bottom of thin layer soft iron are connected; The armature skeleton is made by engineering plastics, and the armature skeleton is a hollow cylinder, and the outside one end of armature skeleton has groove, twines wire.

Compared with prior art, the utility model beneficial effect is:

1. in light weight.The shell of DC linear electric motor of the present utility model adopts low-gravity polyformaldehyde to make, and the core center part that is used for excitation also is a hollow, thereby complete machine weight is lighter than similar motor far away.

2. simple in structure.DC linear electric motor is made up of shell, magnet steel, iron core, armature etc., and building block is few, and complete machine structure is simple.

3. thrust is big.The thin layer magnet steel is close to the iron core outer wall, as yoke; The base core of employing A3 steel extend into the bottom of iron core, and the bottom of base and iron core, the bottom of thin layer soft iron are connected, and the inside and outside magnetic field of winner's magnet steel is connected, and has increased air gap flux density, has increased motor thrust.

Description of drawings

Fig. 1 is the complete machine cutaway view of DC linear electric motor, among the figure: 101-shell, 102-thin layer soft iron, 103-master's magnet steel, 104-armature coil, 105-thin layer magnet steel, 106-iron core, 107-armature skeleton, 108-base.

Fig. 2 is the magnetic polarity orientation figure of main magnet steel.

Fig. 3 is the cutaway view of iron core, thin layer magnet steel and base.

Fig. 4 is the armature structure cutaway view.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the complete machine structure of DC linear electric motor, comprises stator, mover and magnetic field air gap.Stator comprises shell 101 and thin layer soft iron 102, main magnet steel 103, thin layer magnet steel 105 and iron core 106, base 108.Mover comprises armature coil 104 and armature skeleton 107.

The material that shell adopts is polyformaldehyde (POM), polyformaldehyde is a kind of engineering plastics of function admirable, has hardness, intensity and the rigidity of metal, all has good fatigue durability in very wide temperature and humidity scope, and high resilience, also have chemical-resistant preferably.The price of polyformaldehyde is lower than other many engineering plastics, metal partss such as alternative steel, zinc, brass and aluminium.The proportion of polyformaldehyde is 1.39, is far smaller than the proportion 7.8 of steel, makes motor housing with polyformaldehyde, has reduced complete machine weight.As depicted in figs. 1 and 2, thin layer soft iron 102 is embedded on the inwall of shell 101 between shell 101 and main magnet steel 103, as outside yoke, is used for transmitting the external magnetic field of main magnet steel 103.Thin layer soft iron 102 is cylinder-like structures, adopts the A3 steel to make.

Main magnet steel 103 adopts the hydromagnetic made, as: aluminium nickel cobalt, neodymium iron boron etc.As shown in Figure 2, main magnet steel 103 is fan-shaped, is uniformly distributed in the shell inboard, and the magnetic of main magnet steel 103 is: the S utmost point is interior, the N utmost point outside, thin layer soft iron 102 is close in each sheet master magnet steel mutual exclusion.The sheet number of main magnet steel 103 is many more, and magnetic field is even more, and air gap flux density is big more, and quantity can be 3,6,9,12 etc., but considers assembly technology, selects 3 usually for use.

As shown in Figure 3, in axial direction, the core utilance of iron core 106 is very low, and neither magnetic conduction is not born mechanical load yet, but iron core 106 done by the A3 steel usually, and weight is big.Therefore, core center of the present utility model partly is a hollow, and thin layer magnet steel 105 is close to iron core 106 outer walls, as inner yoke.Similar with main magnet steel 103, thin layer magnet steel 105 surrounds into cylindric, and every thin layer magnet steel 105 comprises external magnetic poles and interior permanent magnet; Radially, the external magnetic poles of thin layer magnet steel 105 and main magnet steel 103 interior permanent magnets are opposite.The core of base 108 is cylinders.Base adopts the A3 steel to do, and is used for supporting iron core 106 and thin layer magnet steel 105, main magnet steel 103 and thin layer soft iron 102; The core of base 108 extend into the bottom of iron core 106, the bottom of base 108 and iron core 106, the bottom of thin layer soft iron 102 are connected, the inside and outside magnetic field of winner's magnet steel 103 is connected, increased air gap flux density, help to increase motor thrust, and because iron core 106 is a hollow, this has alleviated stator weight.

As shown in Figure 4, mover comprises armature skeleton 107 and armature coil 104.Armature skeleton 107 is made by engineering plastics, to alleviate its quality it can be responded fast, and armature skeleton 107 is hollow tubular, and an end has groove in the outside of armature skeleton 107, twines wire.Armature skeleton 107 is positioned at the outside of iron core 106, the inboard of main magnet steel 103, and the internal diameter of armature skeleton 107, promotes mover and comes and goes rectilinear motion under electromagnetic field effect greater than the external diameter of iron core 106.

Claims

1. a light weight, high thrust DC linear electric motor, comprise shell, main magnet steel, iron core, armature skeleton and armature coil, iron core is positioned at the center of shell, the armature skeleton is a hollow cylinder, the outside one end of armature skeleton has groove, twines wire, it is characterized in that also comprising base, the material of shell is a polyformaldehyde, and the thin layer soft iron is embedded on the inwall of shell; Core center partly is a hollow, and the thin layer magnet steel is close to the iron core outer wall; Radially, the external magnetic poles of thin layer magnet steel and main magnet steel interior permanent magnet are opposite; The core of base extend into the bottom of iron core, and the bottom of base and iron core, the bottom of thin layer soft iron are connected; The armature skeleton is made by engineering plastics.