CN202043056U - Displacement amplification ultrasonic wave linear motor - Google Patents
Displacement amplification ultrasonic wave linear motor Download PDFInfo
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- CN202043056U CN202043056U CN2011200977653U CN201120097765U CN202043056U CN 202043056 U CN202043056 U CN 202043056U CN 2011200977653 U CN2011200977653 U CN 2011200977653U CN 201120097765 U CN201120097765 U CN 201120097765U CN 202043056 U CN202043056 U CN 202043056U
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Abstract
The utility model discloses a displacement amplification ultrasonic wave linear motor, which mainly comprises a motor stator with a central hole and a motor rotor penetrated into the central hole, wherein the motor stator mainly comprises a stator shell, a radial groove and an axial groove, and the radial groove and the axial groove are arranged on the stator shell; the radial groove and the axial groove are respectively radially arranged and axially arranged along the central hole; one end of the radial groove is communicated with the central hole; the left side or the right side of the radial groove is provided with a spring groove communicated with the radial groove; the axial groove is positioned at the right side or the left side of the radial groove and is communicated with the radial groove; the radial groove is internally provided with a radial piezoelectric bar; the axial groove is internally provided with an axial piezoelectric bar; and the spring groove is internally provided with the spring. The displacement amplification ultrasonic wave linear motor has the advantages of large thrust, high efficiency, small loss, high speed and long service life.
Description
Technical field
The utility model relates to a kind of location of various occasions such as accurate measurement, metering, business automation equipment, industrial electrical equipment, household electrical appliance, robot, automobile, aerospace equipment and displacement amplification ultrasonic linear motor of driving of being applicable to.
Background technology
Ultrasonic linear motor is to utilize the piezoelectric crystal to issue living deformation in External Electrical Field, produces straight-line motor as actuating force.This ultrasonic linear motor has following characteristics:
1, it does not need as other kind linear electric motors, is to be subjected to electrodynamic principle according to current in magnetic field, and electric energy is converted to straight-line mechanical energy.
2, do not have stator and mover the part coil and iron core, simple in structure, volume is little, in light weight, easily manufactured.
3, not affected by magnetic fields, do not generate electromagnetic waves.
4, moment is big, response is fast, but low cruise, and speed is easy to control.
5, step pitch is little, precision is high.
Ultrasonic linear motor is applicable to the location and the driving of various occasions such as accurate measurement, metering, business automation equipment, industrial electrical equipment, household electrical appliance, robot, automobile, aerospace equipment.
The operation principle of ultrasonic linear motor is to utilize the inverse piezoelectric effect of piezoelectric.If piezoelectric crystal is placed external electric field, because electric field action can cause crystals positive and negative charge displacement of center of gravity, this polarization displacement causes crystal generation deformation again.If the polarity of extra electric field is consistent with the polarised direction of piezoelectrics, then the length of piezoelectrics and electric field vertical direction increases; Otherwise, when the polarity of extra electric field opposite with the polarised direction of piezoelectrics, the contraction in length of piezoelectrics and electric field vertical direction then.After removing electric field, piezoelectrics return to normal.Repeatedly apply electric field and remove electric field to piezoelectrics, piezoelectrics will repeatedly produce displacement.This displacement is exactly the power of ultrasonic linear motor.
But existing ultrasonic linear motor is because structure and power transfer mode, has that thrust is little, efficient is low, loss is big, the life-span is short, speed waits defective slowly, needs improvement.
The utility model content
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, provides that a kind of thrust is big, efficient is high, loss is little, speed is fast, the displacement of long service life amplifies ultrasonic linear motor.
The purpose of this utility model is achieved through the following technical solutions: ultrasonic linear motor is amplified in displacement, main by the motor stator that is provided with centre bore and run through the electric mover that is arranged in the centre bore and constitute, it is characterized in that, described motor stator mainly is made of stator case and the radial groove and the axial notch that are arranged on the stator case, and described radial groove and axial notch are along centre bore respectively and radially are provided with and axially are provided with; Described radial groove one end is connected with centre bore, and the left side of radial groove or right side are provided with coupled logical spring groove; Axial notch is positioned at the right side or the left side of radial groove, and is connected with radial groove; Be provided with radially piezoelectricity bar in the described radial groove, be provided with axial piezoelectricity bar in the axial notch, be provided with spring in the spring groove.
Described radial groove, be arranged on radial groove left side spring groove, be arranged on the radial groove right side axial notch, be arranged on radially piezoelectricity bar in the radial groove, be arranged on the axial piezoelectricity bar in the axial notch and the spring that is arranged in the spring groove constitutes left Drive Structure; Described radial groove, be arranged on the radial groove right side spring groove, be arranged on radial groove left side axial notch, be arranged on radially piezoelectricity bar in the radial groove, be arranged on the axial piezoelectricity bar in the axial notch and the spring that is arranged in the spring groove constitutes right Drive Structure; Only set up left Drive Structure or right Drive Structure when motor only needs folk prescription to the function of operation, then left and right sides Drive Structure all will be provided with when the function of the forward and reverse operation of needs, and promptly left Drive Structure and right Drive Structure all are at least one.
As a kind of optimal way of the present utility model, described left Drive Structure is 4, and is divided into two groups, and two left Drive Structure of every group are symmetrical arranged along centre bore; Described right Drive Structure is 4, and is divided into two groups, and two right Drive Structure of every group are symmetrical arranged along centre bore; The left Drive Structure in the utility model and the number of right Drive Structure are not limited thereto, and also can select separately according to actual needs.
Existing piezoelectric or the original paper that is used to make the piezoelectricity bar, displacement (stretching) maximum in each power on/off cycle can only be accomplished the some thousandths of of device size, and can accomplish the device of a few percent, still in development, technical difficulty is very big; And the cost height of piezoelectricity bar as the displacement (stretching) that will increase each power on/off cycle, must increase the use amount of piezoelectricity bar, improves the manufacturing cost of motor.In order to overcome above-mentioned shortcoming, improve the displacement stroke of each action cycle, thereby improve the speed of motor, remedying such motor speed is difficult for the defective that improves and reduces manufacturing cost, the utility model has been advocated displacement amplifying mechanism, method is: also be communicated with radially arm of force chamber and radial displacement enlarged cavity at described radial groove successively away from an end of centre bore, radially be provided with an end and the contacted radially arm of force of piezoelectricity bar radially in the arm of force chamber, radially the other end of the arm of force radial displacement amplification piezoelectric bar interior with being arranged on the radial displacement enlarged cavity contacts; Described axial notch also is communicated with axial arm of force chamber and axial displacement enlarged cavity successively away from an end of radial groove, axially be provided with an end and the axial contacted axial arm of force of piezoelectricity bar in the arm of force chamber, axially the other end of the arm of force axial displacement amplification piezoelectric bar interior with being arranged on the axial displacement enlarged cavity contacts.
As a kind of optimal way of said structure, the axis in described radially arm of force chamber is respectively perpendicular to the axis of radial groove and radial displacement enlarged cavity, and radially is provided with the radial load arm axle in the arm of force chamber, and radially the arm of force is set on the radial load arm axle and can rotates around it; The axis difference groove perpendicular to axial direction in axial arm of force chamber and the axis of axial displacement enlarged cavity, and axially be provided with the axial force arm axle in the arm of force chamber, axially the arm of force is set on the axial force arm axle and can rotates around it; Thereby constitute the displacement amplifying mechanism of similar lever principle, make that the displacement amplification effect is more obvious.
Described radially piezoelectricity bar, axial piezoelectricity bar, radial displacement amplification piezoelectric bar all link to each other with external power source by power line with axial displacement amplification piezoelectric bar, and described external power source is the power supply and the control power supply of motor; Supply unit and control device according in advance setting respectively to motor each radially time, vector, frequency and the logical order of piezoelectricity bar, the axially energising of piezoelectricity bar, radial displacement amplification piezoelectric bar and axial displacement amplification piezoelectric bar control, thereby speed, thrust, displacement, the traffic direction of control motor; Above-mentioned parameter can set in advance and can revise at any time according to instructions for use.
Described radial groove is away from the outer recessed formation draw-in groove of an end of centre bore, and radially the piezoelectricity bar constitutes fixture block away from an end evagination of centre bore, and described fixture block is arranged in the draw-in groove; Adopt this kind structure, make that radially the piezoelectricity bar is positioned at radial groove all the time in the process of motion; Further, described fixture block is near also being provided with spring between end end face of centre bore and the draw-in groove, thereby after removing the electric field of piezoelectricity bar radially, radially the piezoelectricity bar can be got back to the top of radial groove under the elastic force effect of spring.
Described stator case is mainly snapped together by stator case A and stator case B and constitutes, and is convenient to installation and removal, and the stator case in the utility model is not limited to be assembled by two housings, also can be according to the actual conditions otherwise designed.
Be inlaid with several balls on the inwall of described centre bore, the cylindrical of described electric mover is provided with the chute that is complementary with the ball position vertically, and electric mover forms by chute and ball and motor stator and is slidingly matched; Owing to adopted this kind structure, thereby reduced the electric mover suffered frictional force of in centre bore, moving.
The material of above-mentioned electric mover and motor stator parts can be that metal material also can be nonmetallic materials.
Above-mentioned radially piezoelectricity bar and axial piezoelectricity bar are the piezoelectricity part that piezoelectric processes, past elongated lengthwise when having the high-frequency electric field of applying, lose the characteristic that returns to nature behind the electric field,, do not repeat them here because piezoelectric belongs to existing mature technology.
Above-mentioned radial groove preferentially is designed to the axis perpendicular to centre bore, because electric mover is concentric setting with centre bore, promptly radial groove preferentially is designed to the axis perpendicular to electric mover, in actual use, as required low-angle inclination angle can be arranged; Described axial notch is parallel to the axis of electronics mover.
Method of work based on ultrasonic linear motor is amplified in above-mentioned displacement is characterized in that, comprises left driving process and right driving process, wherein:
Left side driving process: under the motor initial condition, radially piezoelectricity row replacement in its left Drive Structure adds the high frequency electric field, and radially the piezoelectricity bar extends along its length, owing to be subjected to the restriction of radial groove, radially the piezoelectricity bar radially forms tight fit between piezoelectricity bar and the electric mover to the elongation of electric mover direction; The axial piezoelectricity row replacement on piezoelectricity bar right side adds the high frequency electric field to being positioned at radially then, axially the piezoelectricity bar extends along its length, owing to be subjected to the restriction of axial notch, axially the piezoelectricity bar is to piezoelectricity bar direction elongation radially and exert pressure, thereby promote radially piezoelectricity bar, and then it is mobile to the left to drive electric mover; After driving finishes, remove radially piezoelectricity bar and the axially high-frequency electric field of piezoelectricity bar, radially piezoelectricity bar and axial piezoelectricity bar return to normal, and under the effect of spring, move to the rightmost side;
Right driving process: after electric mover moves left to extreme position, radially piezoelectricity row replacement in the Drive Structure to the right adds the high frequency electric field, radially the piezoelectricity bar extends along its length, owing to be subjected to the restriction of radial groove, radially the piezoelectricity bar radially forms tight fit between piezoelectricity bar and the electric mover to the elongation of electric mover direction; The axial piezoelectricity row replacement in piezoelectricity bar left side adds the high frequency electric field to being positioned at radially then, axially the piezoelectricity bar extends along its length, owing to be subjected to the restriction of axial notch, axially the piezoelectricity bar is to piezoelectricity bar direction elongation radially and exert pressure, thereby promote radially piezoelectricity bar, and then it is mobile to the right to drive electric mover;
Repeat above-mentioned left driving process and right driving process, electric mover promptly carries out continuous straight line back and forth movement with respect to motor stator.
Above-mentioned machine operation method is at the situation of having only a left Drive Structure and a right Drive Structure, in real work, usually design a plurality of left Drive Structure and right Drive Structure as required, its drive principle is all set up based on the above method, does not repeat them here.
In order to improve the displacement stroke of each action cycle, thereby improve the speed of motor, remedy motor speed and reduce manufacturing cost, overcome the deficiency that existing piezoelectricity bar exists, the method for work that the utility model relates to is further comprising the steps of:
Radial displacement amplification process: radially form in the friction tight process between piezoelectricity bar and the electric mover, add the high frequency electric field to displacement amplification piezoelectric row replacement radially, radial displacement amplification piezoelectric bar extends along its length, owing to be subjected to the restriction of radial displacement enlarged cavity, radial displacement amplification piezoelectric bar is exerted pressure to the arm of force radially, make that radially the arm of force one end is subjected to displacement, radially the other end of the arm of force radially the direction of piezoelectricity bar move, and then promote radially that piezoelectricity bar integral body moves to the electric mover direction, thereby increase radially piezoelectricity bar displacement radially, form tight fit between feasible radially piezoelectricity bar and the electric mover;
The axial displacement amplification process: axially the piezoelectricity bar promotes in the process that radially the piezoelectricity bar moves to the left or to the right, add the high frequency electric field to the row replacement of axial displacement amplification piezoelectric, axial displacement amplification piezoelectric bar extends along its length, owing to be subjected to the restriction of axial displacement enlarged cavity, axial displacement amplification piezoelectric bar is exerted pressure to the axial arm of force, make the axial arm of force one end be subjected to displacement, the other end of the axial arm of force direction of piezoelectricity bar vertically moves, and then impeller-hub moves to piezoelectricity bar direction radially to piezoelectricity bar integral body, thereby increase radially piezoelectricity bar displacement in axial direction, and then increase electric mover move distance to the left or to the right.
In sum, the beneficial effects of the utility model are:
(1) the utility model has bigger thrust with respect to existing ultrasonic linear motor under equal input power;
(2) the utility model can have the higher speed of service with respect to existing ultrasonic linear motor;
(3) the utility model has higher operating efficiency with respect to existing ultrasonic linear motor;
(4) the utility model is with respect to existing ultrasonic linear motor, and working loss is little, longer service life;
(5) the utility model has improved the displacement stroke of each action cycle by displacement amplifying mechanism is set, thereby improves the speed of motor, remedies the not high defective of motor speed that adopts existing piezoelectric to make, and has reduced the manufacturing cost of motor.
Description of drawings
Fig. 1 is the cutaway view of the utility model embodiment 1;
Fig. 2 be among Fig. 1 A to structural representation;
Fig. 3 is another cutaway view among the utility model embodiment 1;
Fig. 4 is the cutaway view of the utility model embodiment 2.
Mark and corresponding parts title in the accompanying drawing: 1-electric mover; 2-radially piezoelectricity bars; 3-axially piezoelectricity bars; 4-spring; 5-radially arm of forces; 6-radial displacement amplification piezoelectric bar; 7-axially arm of forces; 8-axial displacement amplification piezoelectric bar; 9-power line; 10-stator case A; 11-stator case B; 12-radially piezoelectricity bar A; 13-radially piezoelectricity bar B; 14-radially piezoelectricity bar C; 15-radially piezoelectricity bar D; 16-axially piezoelectricity bar A; 17-axially piezoelectricity bar B; 18-axially piezoelectricity bar C; 19-axially piezoelectricity bar D; 20-radially piezoelectricity bar E; 21-radially piezoelectricity bar F; 22-radially piezoelectricity bar G; 23-radially piezoelectricity bar H; 24-axially piezoelectricity bar E; 25-axially piezoelectricity bar F; 26-axially piezoelectricity bar G; 27-axially piezoelectricity bar H; 28-ball; 29-radial load arm axle; 30-axial force arm axle.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited only to this.
Embodiment 1:
As illustrated in fig. 1 and 2, the utility model is mainly by the motor stator that is provided with centre bore and run through the electric mover 1 that is arranged in the centre bore and constitute, described motor stator mainly is made of stator case and the radial groove and the axial notch that are arranged on the stator case, described stator case is mainly snapped together by stator case A11 and stator case B12 and constitutes, and described radial groove and axial notch are radially setting and axially setting along centre bore respectively; Described radial groove one end is connected with centre bore, and the left side of radial groove or right side are provided with coupled logical spring groove; Axial notch is positioned at the right side or the left side of radial groove, and is connected with radial groove; Be provided with radially piezoelectricity bar 2 in the described radial groove, be provided with axial piezoelectricity bar 3 in the axial notch, be provided with spring 4 in the spring groove.
Radial groove in the utility model, be arranged on the spring groove in radial groove left side, and the axial notch that is arranged on the radial groove right side constitutes left Drive Structure, by radially piezoelectricity bar 2, axial piezoelectricity bar 3 and spring 4 are set therein, be used to drive the electronics mover to left movement; Radial groove in the utility model, be arranged on the spring groove on radial groove right side, and the axial notch that is arranged on radial groove constitutes right Drive Structure, by radially piezoelectricity bar 2, axial piezoelectricity bar 3 and spring 4 are set therein, be used to drive the electronics mover and move right.Only set up left Drive Structure or right Drive Structure when motor only needs folk prescription to the function of operation, then left and right sides Drive Structure all will be provided with when the function of the forward and reverse operation of needs, and promptly left Drive Structure and right Drive Structure all are at least one.
Radial groove is away from the outer recessed formation draw-in groove of an end of centre bore, radially piezoelectricity bar 2 constitutes fixture block away from an end evagination of centre bore, described fixture block is arranged in the draw-in groove, is used for piezoelectricity bar 2 radially is fixed on radial groove, and it can not broken away from from radial groove in the process of motion; Also be provided with spring 4 between one end end face of the close centre bore of fixture block and the draw-in groove, be used for radially resetting of piezoelectricity bar 2; Radially piezoelectricity bar 2 all links to each other with external power source by power line 9 with axial piezoelectricity bar 3, is used for to radially piezoelectricity bar 2 and axial piezoelectricity bar 3 apply high magnetoelectricity field; Be inlaid with several balls 28 on the inwall of described centre bore, the cylindrical of described electric mover 1 is provided with the chute that is complementary with ball 28 positions vertically, thereby has reduced the electric mover 1 suffered frictional force of moving in centre bore.
Above-mentioned left Drive Structure and right Drive Structure number can change according to actual conditions, and symmetry or asymmetric being distributed on the stator case respectively.Now be 4 at left Drive Structure and right Drive Structure, and be divided into two groups separately, every group two left Drive Structure or right Drive Structure are further set forth operation principle of the present utility model and process thereof all along the symmetrically arranged situation of centre bore; Distinguish for convenience, as shown in Figure 3, with 4 in left Drive Structure piezoelectricity bar radially piezoelectricity bar A12, radially piezoelectricity bar B13, radially piezoelectricity bar C14, piezoelectricity bar D15 radially of called after respectively radially, 4 with axial piezoelectricity bar A16 that radially the piezoelectricity bar is corresponding respectively, axially piezoelectricity bar B17, axial piezoelectricity bar C18, axial piezoelectricity bar D19; With 4 in right Drive Structure piezoelectricity bar radially piezoelectricity bar E20, radially piezoelectricity bar F21, radially piezoelectricity bar G22, piezoelectricity bar H23 radially of called after respectively radially, 4 with axial piezoelectricity bar E24 that radially the piezoelectricity bar is corresponding respectively, axially piezoelectricity bar F25, axial piezoelectricity bar G26, axial piezoelectricity bar H27.
1. under the motor initial condition, give in the left Drive Structure radially piezoelectricity bar A12 and radially piezoelectricity bar B13 apply high-frequency electric field, radially piezoelectricity bar A12 and radially piezoelectricity bar B13 extend along its length, owing to be subjected to the restriction of radial groove apical position, radially piezoelectricity bar A12 and radially piezoelectricity bar B13 can only extend to the mover axis direction, consequently radially piezoelectricity bar A12 contacts electric mover 1 with piezoelectricity bar B13 radially, and electric mover 1 exerted pressure piezoelectricity bar A12 and radially form tight fit between piezoelectricity bar B13 and the electric mover 1 radially;
Apply high-frequency electric field 2. for axial piezoelectricity bar A16 and axial piezoelectricity bar B17, axially piezoelectricity bar A16 and axial piezoelectricity bar B17 extend along its length, owing to be subjected to the position limit of axial notch right-hand member, axially piezoelectricity bar A16 and axially piezoelectricity bar B17 direction elongation to the left, consequently, axially piezoelectricity bar A16 and axial piezoelectricity bar B17 promote radially piezoelectricity bar A12 and radially piezoelectricity bar B13, and then it is mobile to the left to drive electric mover 1;
3. give radially piezoelectricity bar C14 and radially piezoelectricity bar D15 apply high-frequency electric field, radially piezoelectricity bar C14 and radially piezoelectricity bar D15 extend along its length, owing to be subjected to the restriction of radial groove apical position, radially piezoelectricity bar C14 and radially piezoelectricity bar D15 can only extend to electric mover 1 axis direction, consequently radially piezoelectricity bar C14 contacts electric mover 1 with piezoelectricity bar D15 radially, and electric mover 1 exerted pressure piezoelectricity bar C14 and radially form tight fit between piezoelectricity bar D15 and the electric mover 1 radially;
4. remove piezoelectricity bar A12 radially, radially piezoelectricity bar B13, axially piezoelectricity bar A16 and the axial electric field of piezoelectricity bar B17, radially piezoelectricity bar A12, radially piezoelectricity bar B13, axially piezoelectricity bar A16 and axially piezoelectricity bar B17 return to normality, and under the effect of spring 4, move to the rightmost side;
Apply high-frequency electric field 5. for axial piezoelectricity bar C18 and axial piezoelectricity bar D19, axially piezoelectricity bar C18, axial piezoelectricity bar D19 extend along its length, owing to be subjected to the position limit of axial notch right-hand member, axially piezoelectricity bar C18 and axially piezoelectricity bar D19 direction elongation to the left, consequently axially piezoelectricity bar C18 and axial piezoelectricity bar D19 promote radially piezoelectricity bar C14 and radially piezoelectricity bar D15, and then it is mobile to the left to drive electric mover 1;
6. give once more radially piezoelectricity bar A12 and radially piezoelectricity bar B13 apply high-frequency electric field, it is extended to electric mover 1 axis direction, electric mover 1 is exerted pressure, and forms tight fit between the electric mover 1;
7. remove piezoelectricity bar C14 radially, radially piezoelectricity bar D15, axially piezoelectricity bar C18 and the axial electric field of piezoelectricity bar D19, radially piezoelectricity bar C14, radially piezoelectricity bar D15, axially piezoelectricity bar C18 and axial piezoelectricity bar D19, and under the effect of spring 4, move to the rightmost side.
Repeat above step, electric mover 1 promptly carries out continuous rectilinear motion with respect to motor stator, and its traffic direction is that electric mover 1 moves to the left.
According to above-mentioned principle, radially piezoelectricity bar E20 in the right Drive Structure, radially piezoelectricity bar F21, radially piezoelectricity bar G22, radially piezoelectricity bar H23, axially piezoelectricity bar E24, axially piezoelectricity bar F25, axially piezoelectricity bar G26, the axial action step of piezoelectricity bar H27 are set, can realize that promptly electric mover 1 moves to the right, its operation principle is identical with left Drive Structure, does not repeat them here.
Displacement amplify the supply unit of ultrasonic linear motor and control device give respectively axial piezoelectricity bar and radially the piezoelectricity bar power supply is provided; Supply unit and control device are controlled to time, vector, frequency and the logical order of piezoelectricity bar and the radially energising of piezoelectricity bar motor shaft respectively according to setting in advance, thus speed, thrust, displacement, the traffic direction of control motor; Above-mentioned parameter can set in advance and can revise at any time according to instructions for use.
The utility model can be by changing the axial piezoelectricity bar and the physical dimension of piezoelectricity bar and corresponding component radially, thus the thrust and the speed of change motor.
Embodiment 2:
Because existing piezoelectric or the original paper that is used to make the piezoelectricity bar, displacement (stretching) maximum in each power on/off cycle can only be accomplished the some thousandths of of device size, and can accomplish the device of a few percent, and still in development, technical difficulty is very big; And the cost height of piezoelectricity bar as the displacement (stretching) that will increase each power on/off cycle, must increase the use amount of piezoelectricity bar, improves the manufacturing cost of motor.In order to overcome above-mentioned shortcoming, improve the displacement stroke of each action cycle, thereby improve the speed of motor, remedy such motor speed and reduce manufacturing cost, as shown in Figure 4, the utility model also is communicated with radially arm of force chamber and radial displacement enlarged cavity at described radial groove successively away from an end of centre bore, radially be provided with an end and the piezoelectricity bar 2 contacted radially arm of forces 5 radially in the arm of force chamber, radially the other end of the arm of force 5 radial displacement amplification piezoelectric bar 6 interior with being arranged on the radial displacement enlarged cavity contacts; Described axial notch also is communicated with axial arm of force chamber and axial displacement enlarged cavity successively away from an end of radial groove, axially be provided with an end and the axial piezoelectricity bar 3 contacted axial arm of forces 7 in the arm of force chamber, axially the other end of the arm of force 7 axial displacement amplification piezoelectric bar 8 interior with being arranged on the axial displacement enlarged cavity contacts.
Further, the axis in described radially arm of force chamber is respectively perpendicular to the axis of radial groove and radial displacement enlarged cavity, and radially is provided with radial load arm axle 29 in the arm of force chamber, and radially the arm of force 5 is set on the radial load arm axle 29 and can rotates around it; The axis difference groove perpendicular to axial direction in axial arm of force chamber and the axis of axial displacement enlarged cavity, and axially be provided with axial force arm axle 30 in the arm of force chamber, axially the arm of force 7 is set on the axial force arm axle 30 and can rotates around it; When radial displacement amplification piezoelectric bar 6 or 8 elongations of axial displacement amplification piezoelectric bar, must be to the radially arm of force 5 or the axially arm of force 7 one ends generation pressure, radially the arm of force 5 or the axial arm of force 7 rotate around axial force arm axle 29 or axial force arm axle 30, thereby make its other end move in the opposite direction, promote radially piezoelectricity bar 2 or axially piezoelectricity bar 3 integral body move, thereby constitute the displacement amplifying mechanism of similar lever principle, make that the displacement amplification effect is more obvious.
Now further set forth operation principle and process that the utility model displacement is amplified;
Radial displacement amplification process: radially form in the friction tight process between piezoelectricity bar 2 and the electric mover 1, apply high-frequency electric field to displacement amplification piezoelectric bar 6 radially, radial displacement amplification piezoelectric bar 6 extends along its length, owing to be subjected to the restriction of radial displacement enlarged cavity, radial displacement amplification piezoelectric bar 6 is exerted pressure to the arm of force 5 radially, make that radially the arm of force 5 one ends are subjected to displacement, radially the other end of the arm of force 5 radially the direction of piezoelectricity bar 2 move, and then promote radially that piezoelectricity bar 2 integral body move to electric mover 1 direction, thereby increase radially piezoelectricity bar 2 displacement radially, form tight fit between feasible radially piezoelectricity bar 2 and the electric mover 1;
The axial displacement amplification process: axially piezoelectricity bar 3 promotes in the process that radially piezoelectricity bar 2 moves to the left or to the right, apply high-frequency electric field to axial displacement amplification piezoelectric bar 8, axial displacement amplification piezoelectric bar 8 extends along its length, owing to be subjected to the restriction of axial displacement enlarged cavity, axial displacement amplification piezoelectric bar 8 is exerted pressure to the axial arm of force 7, make the axial arm of force 7 one ends be subjected to displacement, the other end of the axial arm of force 7 direction of piezoelectricity bar 3 vertically moves, and then impeller-hub moves to piezoelectricity bar 2 directions radially to piezoelectricity bar 3 integral body, thereby increase radially piezoelectricity bar 2 displacement in axial direction, and then increase electric mover 1 move distance to the left or to the right.
Other parts of present embodiment are identical with embodiment 1, do not repeat them here.
As mentioned above, just can realize the utility model preferably.
Claims (8)
1. ultrasonic linear motor is amplified in displacement, main by the motor stator that is provided with centre bore and run through the electric mover (1) that is arranged in the centre bore and constitute, it is characterized in that, described motor stator mainly is made of stator case and the radial groove and the axial notch that are arranged on the stator case, and described radial groove and axial notch are along centre bore respectively and radially are provided with and axially are provided with; Described radial groove one end is connected with centre bore, and the left side of radial groove or right side are provided with coupled logical spring groove; Axial notch is positioned at the right side or the left side of radial groove, and is connected with radial groove; Be provided with radially piezoelectricity bar (2) in the described radial groove, be provided with axial piezoelectricity bar (3) in the axial notch, be provided with spring (4) in the spring groove.
2. ultrasonic linear motor is amplified in displacement according to claim 1, it is characterized in that, described radial groove, be arranged on radial groove left side spring groove, be arranged on the radial groove right side axial notch, be arranged on radially piezoelectricity bar (2) in the radial groove, be arranged on the axial piezoelectricity bar (3) in the axial notch and the spring (4) that is arranged in the spring groove constitutes left Drive Structure; Described radial groove, be arranged on the radial groove right side spring groove, be arranged on radial groove left side axial notch, be arranged on radially piezoelectricity bar (2) in the radial groove, be arranged on the axial piezoelectricity bar (3) in the axial notch and the spring (4) that is arranged in the spring groove constitutes right Drive Structure; Described left Drive Structure and right Drive Structure all are at least one.
3. ultrasonic linear motor is amplified in displacement according to claim 2, it is characterized in that described left Drive Structure is 4, and be divided into two groups that two left Drive Structure of every group are symmetrical arranged along centre bore; Described right Drive Structure is 4, and is divided into two groups, and two right Drive Structure of every group are symmetrical arranged along centre bore.
4. amplify ultrasonic linear motor according to each described displacement in the claim 1～3, it is characterized in that, described radial groove also is communicated with radially arm of force chamber and radial displacement enlarged cavity successively away from an end of centre bore, radially be provided with an end and the contacted radially arm of force of piezoelectricity bar (2) (5) radially in the arm of force chamber, radially the other end of the arm of force (5) the radial displacement amplification piezoelectric bar (6) interior with being arranged on the radial displacement enlarged cavity contacts; Described axial notch also is communicated with axial arm of force chamber and axial displacement enlarged cavity successively away from an end of radial groove, axially be provided with an end and the axial contacted axial arm of force of piezoelectricity bar (3) (7) in the arm of force chamber, axially the other end of the arm of force (7) the axial displacement amplification piezoelectric bar (8) interior with being arranged on the axial displacement enlarged cavity contacts.
5. ultrasonic linear motor is amplified in displacement according to claim 4, it is characterized in that, the axis in described radially arm of force chamber is respectively perpendicular to the axis of radial groove and radial displacement enlarged cavity, and radially be provided with radial load arm axle (29) in the arm of force chamber, radially the arm of force (5) is set on the radial load arm axle (29) and can rotates around it; The axis difference groove perpendicular to axial direction in axial arm of force chamber and the axis of axial displacement enlarged cavity, and axially be provided with axial force arm axle (30) in the arm of force chamber, the axial arm of force (7) is set in axial force arm axle (30) and goes up and can rotate around it.
6. ultrasonic linear motor is amplified in displacement according to claim 4, it is characterized in that described radially piezoelectricity bar (2), axial piezoelectricity bar (3), radial displacement amplification piezoelectric bar (6) all link to each other with external power source by power line (9) with axial displacement amplification piezoelectric bar (8).
7. amplify ultrasonic linear motor according to each described displacement in the claim 1～3, it is characterized in that, described radial groove is away from the outer recessed formation draw-in groove of an end of centre bore, radially the piezoelectricity bar constitutes fixture block away from an end evagination of centre bore, described fixture block is arranged in the draw-in groove, and also is provided with spring (4) between an end end face of the close centre bore of fixture block and the draw-in groove.
8. amplify ultrasonic linear motor according to each described displacement in the claim 1～3, it is characterized in that, be inlaid with several balls (28) on the inwall of described centre bore, the cylindrical of described electric mover (1) is provided with the chute that is complementary with ball (28) position vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200977653U CN202043056U (en) | 2011-04-06 | 2011-04-06 | Displacement amplification ultrasonic wave linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200977653U CN202043056U (en) | 2011-04-06 | 2011-04-06 | Displacement amplification ultrasonic wave linear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202043056U true CN202043056U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200977653U Expired - Fee Related CN202043056U (en) | 2011-04-06 | 2011-04-06 | Displacement amplification ultrasonic wave linear motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142789A (en) * | 2011-04-06 | 2011-08-03 | 刘勤 | Displacement amplification ultrasonic linear motor and working method thereof |
| CN103825492A (en) * | 2013-05-15 | 2014-05-28 | 南京航空航天大学 | Piezoelectric stepping motor |
-
2011
- 2011-04-06 CN CN2011200977653U patent/CN202043056U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142789A (en) * | 2011-04-06 | 2011-08-03 | 刘勤 | Displacement amplification ultrasonic linear motor and working method thereof |
| CN103825492A (en) * | 2013-05-15 | 2014-05-28 | 南京航空航天大学 | Piezoelectric stepping motor |
| CN103825492B (en) * | 2013-05-15 | 2016-12-28 | 南京航空航天大学 | A kind of piezoelectricity motor |
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