CN2260398Y - Linear electric motor - Google Patents

Abstract

The utility model relates to a linear electric motor which can provide linear dynamic force for some machines with requirements of linear dynamic force. The utility model is provided with the basic structure that the center of a rotor of the electric machine is provided with an axle sleeve, an inner bore of the axle sleeve is provided with inner threads, and an axle is installed in the axle sleeve and is provided with outer threads which are matched with the inner threads of the axle sleeve. The linear electric motor solves the problem of increasing an additional apparatus for the machine with the requirement of linear dynamic force when an electric rotating machine is used. The linear electric motor has the advantages of simple structure, little space usage and large force pitch and can be used for various machines in reciprocal motion.

Description

Linear electric motors

The utility model relates to a kind of motor, is to produce the linear electric motors that prolong axial linear movement.

At present general motor is made up of stator, rotor and axle, axle is fixed on rotor center, rotor rotates in stator during work, and drive axle around axially doing the circular motion work done, but some uses the mechanism of motor to need straight-line power, motor must be increased gear, tooth bar, worm gear, worm screw etc. circular motion is become rectilinear motion, could use, increase by a cover attachment device so for the mechanism that uses motor and taken the space of mechanism and increased use cost.

The purpose of this utility model provides a kind of linear electric motors, it can produce the power that prolongs axial motion, in the straight-line mechanism of needs, these linear electric motors can be installed directly, can save circular motion is become straight-line attachment device, solve the problem that takes up room and increase cost.

The purpose of this utility model is to realize like this, motor is mainly by shell, stator, end cap, rotor, axle sleeve, axle, key is formed, motor shaft will pass the length of two end caps of whole motor, add and use the needed length of this motor range, rotor center is porose, two ends of rotor is equipped with axle sleeve, closely link together by centre bore and rotor, axle sleeve prolongs axially through hole, axle passes through hole and is contained in the rotor, on the cylindrical of axle external screw thread is arranged, and in the through hole of axle sleeve internal thread is arranged, cooperate with the external screw thread on the axle, the cylindrical of axle also is provided with and prolongs the keyway that certain-length is axially arranged, and key is equipped with in the end cap inboard of motor one end, and an end of key is fixed on the end cap, the other end can slide in keyway, axle can be prolonged in motor endwisely slip and can not rotate.For whole motor, when energized, stator produces rotating magnetic field under the effect of rotating magnetic field, the rotor rotation, internal thread during the rotor rotation on the axle sleeve of adorning on the rotor acts on the external screw thread on the axle, rotatable also can the prolonging of axle moved axially, again because the key on the electric motor end cap and the effect of keyway, make axle prolong axial motion only, by above structure and process, make motor shaft prolong axially,, can make motor shaft prolong axially another direction rectilinear motion through above process when the power supply of connecting when being opposite with above power supply direction to a direction rectilinear motion.Can reach motor shaft by above mechanism and prolong the reciprocating purpose of axial straight line.

Become the rectilinear motion of axle owing to the rotor that adopts above mechanism with motor rotatablely moves, make linear electric motors can produce the power of axial linear movement, having solved needs straight-line mechanism, increase the problem of attachment device.

Further specify below in conjunction with accompanying drawing:

Fig. 1 is that direct-axis of the present utility model is to profile;

Fig. 2 is profile and the part sectioned view of Fig. 1;

Fig. 3 is the drawing in side sectional elevation of A-A part among Fig. 1;

Fig. 4 is the drawing in side sectional elevation of B-B part among Fig. 1;

Fig. 5 is the drawing in side sectional elevation of C-C part among Fig. 1;

Fig. 6 is the enlarged drawing of M part among Fig. 1

Among Fig. 1: 1, internal thread 8, bearing 9, end cap 10, keyway 11, key 12, another end cap 13, the through hole on the external screw thread 5 on casing 2, stator 3, rotor 4, the axle, axle 6, rotor axle sleeve 7, the axle sleeve

Casing 1 among Fig. 1, two ends are fixed with end cap 9 and end cap 12 endoporus are that the smooth screw thread that do not have is convenient to axle 5 slip therein, the casing inboard is fixed with motor stator 2, it is axially identical with casing 1 stator 2 that rotor 3 is contained in stator 2 centres, there is axle sleeve 6 at rotor 3 two ends, axle sleeve 6 closely links together by the hole of rotor center, axle sleeve 6 has and prolongs axial through hole 13, through hole 13 inboards are manufactured with internal thread 7, there is bearing 8 at axle sleeve 6 two ends, the outside of bearing 8 is contained between casing 1 and end cap 9 and the end cap 12, be used for fixing the position of rotor 3 in motor and rotor 3 is rotated flexibly, the axle sleeve 6 that has through hole 13 and internal thread 7 has formed an integral body with rotor 3, axle 5 is contained in the through hole 13 of axle sleeve 6, axle 5 cylindricals and axle sleeve 6 position contacting are manufactured with external screw thread 4, external screw thread 4 and internal thread 7 match, have with the end cap contact position on the axle 5 and prolong axial long keyway 10, axle 5 is by the end cap on the casing 9, end cap 12, axle sleeve 6 passes whole motor, the position of end cap 9 inboard engagement shafts 5 is provided with key 11, one end of key 11 is fixed on the inboard of end cap 9, the other end can slide in the keyway on the axle 5 10, key 11 makes axle 5 to prolong and moves axially, can not be around axial rotation, internal thread 7 and key 11 define position and the direction of axle in motor jointly, motor stator 2 produces rotating magnetic field when the motor energized, magnetic field drives rotor 3 and rotates, because rotor 3 links into an integrated entity with axle sleeve 6, axle sleeve 6 also rotates simultaneously, the internal thread 7 of axle sleeve 6 acts on the external screw thread 4 on 5, at internal thread 7 and external screw thread 4 and key 11, under the acting in conjunction of keyway 10, axle 5 has produced the rectilinear motion that prolongs an axial direction, when motor turn-on reversal power supply, can make motor shaft 5 prolong axially another direction rectilinear motion through above process.

Claims (1)

1. A kind of linear electric motors, stator is housed in casing, end cap is equipped with at the casing two ends, rotor is housed in the stator, axle is housed in the rotor, it is characterized in that axle sleeve is housed in the rotor, and axle sleeve and rotor are fixed into one, bearing is equipped with at the axle sleeve two ends, bearing two outsides are installed between casing and the end cap, and axle is housed in the axle sleeve, and the axle two ends pass motor two ends end cap, internal thread is arranged in the axle sleeve, there is external screw thread in the axle outside with the axle sleeve contact position, and the outside of axle has with the end cap contact position prolongs axial long keyway, and key is equipped with in the position of electric motor end cap inboard engagement shaft, one end of key can slide in the keyway of axle, and the other end of key is fixed on the end cap.

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