CN209267475U - A kind of clamped formula piezoelectricity straight line driver of magnetic rheologic magnetic coupling tune friction - Google Patents

Abstract

The utility model relates to a kind of clamped formula piezoelectricity straight line drivers of magnetic rheologic magnetic coupling tune friction, belong to Precision Piezoelectric actuation techniques field.By two pieces of piezoelectric bimorphs of short grip block fixed clamp on affixed clamped piece, clamped piece in the middle part of movable body, method of clamping is asymmetric clamping, and two pieces of piezoelectric bimorphs are fixedly connected by mass block with screw, and frictional disk is fixedly mounted in bottom, and frictional disk is dipped in magnetorheological fluid；Movable body two sides are linear guide, and linear guide is fixedly mounted on both side plate, and side plate is fixedly mounted on pedestal, and the electromagnetic coil for having magnetic conductive shell is placed on pedestal, and middle part seals to form the cavity for placing magnetorheological fluid with diaphragm seal and sealing strip.Advantage is: coupling the frictional force adjustment for realizing driver with electromagnetic coil using magnetorheological fluid, reduces traditional fretting wear, improve precision and the service life of driver.

Description

A kind of clamped formula piezoelectricity straight line driver of magnetic rheologic magnetic coupling tune friction

Technical field

The utility model belongs to small, precision actuation field.

Background technique

In recent years, with the rapid development of micro-nano actuation techniques, biomedicine, precision machinery, bio-robot, from Dynamic control, accurate measurement, driving requirement of the technical fields such as accurate operation, accurate device, Ultra-precision Turning to microminiature machinery Increase year by year.The other actuation techniques of micro/nano level have become domestic and international scientific research machine as the core technology for exploring microscopic fields Structure, scholar research hotspot.Traditional precision machinery driving method generally uses mechanical structure formula, such as the silk in fine turning lathe Bar pair and rolling, slide rail, precision auger cotter mechanism etc., the even mechanical structure of superhigh precision, still can not keep away Exempt from there are fit-up gap, fretting wear, creep phenomena such as, therefore traditional mechanical structure formula driver is difficult to promote precision level, Under this form, many novel driving methods are developed, such as electrostatic attraction, electromagnetic attraction formula, magnetostriction type, shape Shape memory alloys formula and piezoelectric type etc..Piezoelectric ceramics is a kind of intellectual material for being widely used in precision actuation field, is had Low energy consumption, without electromagnetic interference, fast response time the advantages that, be that the driver of driving element becomes accurate in recent years using piezoelectric material One important branch of drive area.

Precision Piezoelectric driving device is widely studied and applies in recent years.Piezoelectric actuator can divide according to driving principle Are as follows: Direct Action Type piezoelectric actuator, Inchworm type piezoelectric actuator, ultrasonic type piezoelectric actuator and inertia-type piezoelectric actuator.Inertia Piezoelectric actuator is that the inertial impact force for generating inertial mass and piezoelectric element collective effect is filled as the driving of driving force It sets, mechanical structure is simple, and movement velocity is very fast, and the driving motion mode of formation is easily controllable, and can obtain big stroke Continuous movement, can be always the hot spot studied both at home and abroad with steady operation in high frequency state.

The working mechanism majority for the inertial piezoelectric driver developed at present be by it is automatically controlled or change mechanical structure or Capable difference driving movement, to obtain the driving movement of power difference using frictional force control mode, the research work of early stage is mainly minority Generating different inertial impact forces by electric signal makes mechanism kinematic；With the extension of research work and scientific domain, in order to incite somebody to action Novel intelligent material is introduced into precision actuation field, the method using magnetic rheology effect control frictional force is proposed, by changing Varying magnetic field controls frictional force and realizes control driver fan-out capability.

In view of above-mentioned condition, the utility model proposes inertial piezoelectric driver using symmetrical square wave electric signal as piezoelectricity The pumping signal of oscillator, piezoelectric vibrator generate different size of inertial impact force under the conditions of asymmetric clamping, when rushing for generation When hitting power greater than frictional force, movable body movement, when the impact force of generation is less than frictional force, movable body is static.Driver rubs The output performance of driver can be indirectly controlled according to the energization size of electromagnetic coil, regulating friction force size by wiping apparatus for adjusting force, With good controllability.

Summary of the invention

The technical problem to be solved by the utility model is to being coupled by introducing magnetorheological fluid with electromagnetic coil to optimize pressure The generally existing solid of apparatus for adjusting force is rubbed in electric drive to solid friction, to solve common piezoelectric actuator because of solid The fretting wear of solid generation, frictional force are unevenly distributed, frictional force is difficult to quantitative the problems such as adjusting.

In order to solve the above technical problems, the technical solution adopted in the utility model is:

Affixed clamped piece (q) in the middle part of movable body (a), by short grip block one (n1), short grip block two (n2) on clamped piece (q) Fixed clamp piezoelectric bimorph one (o1) and piezoelectric bimorph two (o2), method of clamping are asymmetric clamping, two pieces of piezoelectric bimorphs Piece is fixedly connected by mass block (p) with screw, and frictional disk (l) is fixedly mounted in clamped piece of bottom (q), and frictional disk is dipped in magnetorheological fluid (j) in；Movable body (a) two sides are fixedly mounted on the sliding block of linear guide, and guide rail is fixedly mounted on both side plate, and side plate is fixed It is mounted on pedestal (i), the electromagnetic coil (h) for having magnetic conductive shell is placed on pedestal, has diaphragm seal in the middle part of magnetic conductive shell (k1) cavity to be formed and place magnetorheological fluid is sealed with sealing strip.

Magnetic conductive shell, friction disk material are electrical pure iron；Pedestal and side plate material are organic glass；Coil rack material is Plastics.

The utility model has the advantages that: the frictional force adjustment for realizing driver is coupled with electromagnetic coil using magnetorheological fluid, Reduce traditional fretting wear, improves precision and the service life of driver.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is A-A diagrammatic cross-section in the overall structure diagram of the utility model；

Fig. 3 is B-B diagrammatic cross-section in the overall structure diagram of the utility model；

Fig. 4 is the primary magnetic field magnetic circuit that left side electromagnetic coil generates in the overall structure diagram of the utility model.

Specific embodiment

Present embodiment is illustrated referring to figs. 1 to Fig. 4, and a kind of magnetic rheologic magnetic coupling tune described in present embodiment rubs The clamped formula piezoelectricity straight line driver wiped, by short one n1 of grip block, short folder on affixed clamped piece of q in the middle part of movable body a, clamped piece of q Two n2 fixed clamp piezoelectric bimorph of block, one o1 and two o2 of piezoelectric bimorph are held, method of clamping is asymmetric clamping, two pieces of piezoelectricity Twin lamella is fixedly connected by mass block p with screw, and frictional disk 1 is fixedly mounted in the clamped piece of bottom q, and frictional disk is dipped in magnetorheological fluid j In；The two sides movable body a are fixedly mounted on the sliding block of linear guide, and guide rail is fixedly mounted on both side plate, and side plate is fixedly mounted On pedestal i, the electromagnetic coil h for having magnetic conductive shell is placed on pedestal, has diaphragm seal k1 and sealing strip in the middle part of magnetic conductive shell Sealing forms the cavity for placing magnetorheological fluid.

Magnetic conductive shell, friction disk material are electrical pure iron；Pedestal and side plate material are organic glass；Coil rack material is Plastics.

In the utility model, the electromagnetic field that magnetic conductive shell and electromagnetic coil structure generate shears introduction by magnetic field to frictional disk In magnetorheological fluid structure, the most of magnetic field generated in electromagnetic coil is used in magnetic rheology effect.

In the utility model, using symmetrical square wave electric signal as the pumping signal of piezoelectric vibrator, piezoelectric vibrator is non-right Claim to generate different size of inertial impact force under the conditions of clamping, when the impact force of generation is greater than frictional force, movable body is stablized single To movement, when the impact force of generation is less than frictional force, movable body stop motion.The friction apparatus for adjusting force energy of driver according to The energization size of electromagnetic coil, regulating friction force size indirectly control the output performance of driver, have good controllability.

Claims (1)

1. a kind of clamped formula piezoelectricity straight line driver of magnetic rheologic magnetic coupling tune friction comprising: movable body (a), sliding block one (b1), sliding block two (b2), guide rail one (c1), guide rail two (c2), side plate one (d1), side plate two (d2), side plate three (d3), side plate four (d4), sealing strip fixed plate (e), upper magnetic conductive shell (g1), lower magnetic conductive shell (g2), electromagnetic coil (h), pedestal (i), magnetorheological Liquid (j), diaphragm seal (k1), sealing strip one (k2), sealing strip two (k3), frictional disk (l), coil rack (m), short grip block one (n1), short grip block (n2), right side piezoelectric bimorph (o1), left side piezoelectric bimorph (o2), right side substrate (o102), left side base Plate (o202), right side piezoelectric ceramics (o101), left side piezoelectric ceramics (o201), mass block (p), clamped piece (q), feature exists Affixed clamped piece (q) in the middle part of: movable body (a), it is fixed by short grip block one (n1), short grip block two (n2) on clamped piece (q) Clamp piezoelectric bimorph one (o1) and piezoelectric bimorph two (o2), method of clamping is asymmetric clamping, two pieces of piezoelectric bimorphs by Mass block (p) is fixedly connected with screw, and frictional disk (l) is fixedly mounted in clamped piece of bottom (q), and frictional disk is dipped in magnetorheological fluid (j) In；Movable body (a) two sides are fixedly mounted on the sliding block of linear guide, and guide rail is fixedly mounted on both side plate, the fixed peace of side plate On pedestal (i), the electromagnetic coil (h) for having magnetic conductive shell is placed on pedestal, has diaphragm seal (k1) in the middle part of magnetic conductive shell The cavity to be formed and place magnetorheological fluid is sealed with sealing strip；Magnetic conductive shell, friction disk material are electrical pure iron；Pedestal and side plate material Matter is organic glass；Coil rack material is plastics.