CN115924500A - Linear feeding device and method based on piezoelectric transducer inertia driving - Google Patents
Linear feeding device and method based on piezoelectric transducer inertia driving Download PDFInfo
- Publication number
- CN115924500A CN115924500A CN202211514761.XA CN202211514761A CN115924500A CN 115924500 A CN115924500 A CN 115924500A CN 202211514761 A CN202211514761 A CN 202211514761A CN 115924500 A CN115924500 A CN 115924500A
- Authority
- CN
- China
- Prior art keywords
- piezoelectric
- spring piece
- groove
- piece
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Jigging Conveyors (AREA)
Abstract
The invention discloses a linear feeding device and a method based on piezoelectric transducer inertia driving, wherein the feeding device comprises a base, first to fourth spring pieces, first to second connecting blocks, a piezoelectric transducer, a top disc, a piezoelectric bimorph, first to third blocking pieces and M + N + P adjusting bolts; when the device works, a sinusoidal excitation signal is applied to the piezoelectric transducer, and the second-order longitudinal vibration mode of the piezoelectric transducer can be excited, so that the reciprocating bending vibration of the spring pieces is induced, and the top plate is driven to move in the horizontal and vertical directions. The material placed in the top plate moves forwards and upwards along with the top plate in the trough. When the spring piece moves to the extreme position, the elastic potential energy stored in the spring piece drives the top plate to move back, and at the moment, the material continuously moves forwards in a parabola shape under the inertia effect and falls down. Under the periodic movement, the transportation of the materials in the top plate is realized. The invention has simple structure and easy processing and assembly.
Description
Technical Field
The invention relates to the field of piezoelectric feeders, material conveying and microparticle conveying, in particular to a linear feeding device and method based on piezoelectric transducer inertia driving.
Background
The vibrating material conveying device is a feeding device commonly used in automatic packaging, has the functions of forming the alignment, the sequencing and the directional conveying of materials, and has important application value in the production fields of the modern precision semiconductor device, such as a seal measuring link, a surface assembly technology, a micro machine and the like which need automatic precision conveying.
The vibration material conveying device can be divided into an electromagnetic vibration material conveying device and a piezoelectric vibration material conveying device according to a vibration excitation source. Feeding devices adopting electromagnets as driving sources are widely applied to production lines, but the electromagnetic type vibration feeder has the defects of high noise, low energy conversion rate, unsuitability for precise material conveying and the like. With the development of piezoelectric technology, new drivers using piezoelectric materials as driving sources are receiving more and more attention from researchers.
In 1977, researchers of japan special ceramics co., ltd, first proposed a piezoelectric vibration feeder using a rectangular piezoelectric ceramic plate as a driving source. The linear piezoelectric vibration feeder developed by japanese researchers mainly consists of a base, a piezoelectric vibrator, a spring piece, a top plate and the like. The working principle is that when the piezoelectric vibrator is excited by an alternating excitation signal, the spring piece generates reciprocating bending deformation under the excitation of the piezoelectric ceramic due to the inverse piezoelectric effect, and the top plate is induced to generate elliptic motion, so that materials are conveyed. Due to the fact that the patch type piezoelectric ceramic piece is adopted for excitation, the amplitude of the piezoelectric vibration feeder is small, and the conveying effect is poor.
The common piezoelectric feeding device on the market at present is added with a mass block on the basis of the piezoelectric vibration feeder, and the vibration amplitude of the top plate is improved through the inertia added by the mass block, so that the conveying effect is improved. Since the chip-type piezoelectric vibration feeder mainly uses the d31 effect of piezoelectric ceramics, and the d31 of the piezoelectric ceramics is much smaller than the d33, the efficiency of the chip-type piezoelectric vibration feeder is lower than that of the sandwich-type piezoelectric vibration feeder. The introduction of the mass places higher demands on the manufacturing assembly of the device.
Disclosure of Invention
The invention aims to solve the technical problem of providing a linear feeding device and a linear feeding method based on the inertial drive of a piezoelectric transducer aiming at the defects involved in the background technology.
The invention adopts the following technical scheme for solving the technical problems:
the linear feeding device based on the inertia drive of the piezoelectric transducer comprises a base, first to fourth spring pieces, first to second connecting blocks, the piezoelectric transducer, a top plate, a piezoelectric bimorph, first to third stoppers and M + N + P adjusting bolts, wherein M, N and P are natural numbers which are more than or equal to 1;
the piezoelectric transducer comprises a front beam, a middle beam, a rear beam, a first piezoelectric unit, a second piezoelectric unit, a first pre-tightening bolt and a second pre-tightening bolt;
the front beam and the rear beam are identical in structure and respectively comprise an end part, an amplifying part and a root part, wherein the end part and the root part are both cylinders, and the area of the end surface of the end part is smaller than that of the end surface of the root part; the enlargement part is a circular table with the same end face shape at one end and the same end face shape at the other end and the same end face shape at the root part, and the end with smaller area of the enlargement part is coaxially and fixedly connected with one end of the end part, and the end with larger area is coaxially and fixedly connected with one end of the root part; the center of the end face of the other end of the end part is provided with a countersunk through hole penetrating through the end part, the amplifying part and the root part along the axis;
the middle beam is a cylinder with the cross section the same as the end face of the root of the front beam, and the centers of the end faces of the two ends of the middle beam are provided with pre-tightening threaded blind holes;
the first piezoelectric unit and the second piezoelectric unit have the same structure and respectively comprise 2Q circular piezoelectric ceramic pieces, wherein Q is a natural number more than or equal to 1; the 2Q circular piezoelectric ceramic pieces are sequentially stacked and are polarized along the thickness direction, and the polarization directions of the adjacent piezoelectric ceramic pieces are opposite;
the first pre-tightening bolt sequentially penetrates through the front beam and the first piezoelectric unit from a countersunk through hole of the front beam and then is in threaded connection with a pre-tightening threaded blind hole at one end of the middle beam, and the front beam, the first piezoelectric unit and the middle beam are clamped to be coaxial; the second pre-tightening bolt sequentially penetrates through the rear beam and the second piezoelectric unit from the countersunk through hole of the rear beam and then is in threaded connection with the pre-tightening threaded blind hole at the other end of the middle beam, and the rear beam, the second piezoelectric unit and the middle beam are clamped to be coaxial;
the top plate is a rectangular plate;
the first spring piece, the second spring piece, the third spring piece and the third spring piece are all rectangular spring pieces;
the first spring piece and the second spring piece are arranged in parallel, the lower ends of the first spring piece and the second spring piece are fixedly connected with the base, and the upper ends of the first spring piece and the second spring piece are fixedly connected with the first connecting block and the second connecting block respectively;
the third spring piece and the fourth spring piece are arranged in parallel, the lower ends of the third spring piece and the fourth spring piece are fixedly connected with the first connecting block and the second connecting block respectively, and the upper ends of the third spring piece and the fourth spring piece are fixedly connected with two ends of the top plate respectively, so that the top plate is horizontally arranged, and an included angle between the third spring piece and the horizontal plane is not equal to 90 degrees;
the ends of the front beam and the rear beam of the piezoelectric transducer are respectively and correspondingly fixedly connected with the first connecting block and the second connecting block, and the axis of the piezoelectric transducer is parallel to the edge of the top plate in the length direction;
the adjusting bolt comprises a nut and a stud;
the upper surfaces of the first blocking piece, the second blocking piece and the third blocking piece are respectively provided with M, N and P adjusting grooves, the adjusting grooves are strip-shaped grooves perpendicular to the top plate, strip-shaped through grooves perpendicular to the top plate are formed in the adjusting grooves, the width of each adjusting groove is larger than the diameter of a nut of the adjusting bolt, and the width of each strip-shaped through groove is smaller than the diameter of the nut of the adjusting bolt and larger than the diameter of a stud of the adjusting bolt;
m + N + P positioning threaded blind holes which correspond to M adjusting grooves in the first stopper, N adjusting grooves in the second stopper and P adjusting grooves in the third stopper one by one are formed in the upper surface of the top disc;
the M + N + P adjusting bolts penetrate through the M + N + P adjusting grooves in a one-to-one corresponding mode and are in threaded connection with the M + N + P positioning threaded blind holes in a one-to-one corresponding mode, the first blocking piece, the second blocking piece and the third blocking piece are fixed on the top disc, a feeding groove is formed between the first blocking piece and the second blocking piece, a discharging groove is formed between the first blocking piece and the third blocking piece, and a returning groove is formed between the second blocking piece and the third blocking piece; an included angle between the backspacing groove and the discharge groove is an acute angle;
one end of the piezoelectric bimorph is fixedly connected with the third retaining piece, and the other end of the piezoelectric bimorph abuts against the second retaining piece and is used for isolating the feed chute and the backspacing chute under the non-driving state to enable the feed chute to be communicated with the discharge chute, and isolating the feed chute and the discharge chute under the driving state to enable the feed chute to be communicated with the backspacing chute.
As a further optimization scheme of the linear feeding device based on the inertia drive of the piezoelectric transducer, a plurality of keys for clamping are circumferentially arranged on the front beam, the middle beam and the rear beam.
As a further optimization scheme of the linear feeding device based on the inertial driving of the piezoelectric transducer, Q is 1.
The invention also discloses a working method of the linear feeding device based on the inertial drive of the piezoelectric transducer, which comprises the following steps:
the feeding groove is positioned between the third spring piece and the discharging groove, if materials are required to be transported from the feeding groove to the discharging groove or the backspacing groove, a simple harmonic excitation signal with preset frequency is applied to all piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit of the piezoelectric transducer, and a second-order longitudinal vibration mode of the piezoelectric transducer is excited; the piezoelectric transducer transmits vibration to the third spring piece and the fourth spring piece through the connecting block to induce bending vibration of the third spring piece and the fourth spring piece; because the included angle between the third spring leaf and the horizontal plane is not 90 degrees, the top plate moves in the horizontal direction and the vertical direction under the driving of the bending vibration of the third spring leaf and the fourth spring leaf, and then materials are driven to be transported from the feeding groove to the discharging groove or the backspacing groove in the top plate;
if the feeding groove and the backspacing groove need to be isolated, the feeding groove is communicated with the discharging groove, and the piezoelectric bimorph is not driven;
if the feeding groove and the discharging groove are required to be isolated, the feeding groove is communicated with the backspacing groove, and a preset direct current signal is input to the piezoelectric bimorph, so that the piezoelectric bimorph can be bent.
The invention also discloses another linear feeding device based on the inertia drive of the piezoelectric transducer, which comprises a base, first to fourth spring pieces, first to second connecting blocks, the piezoelectric transducer, a top disc, a piezoelectric bimorph, first to third stoppers and M + N + P adjusting bolts, wherein M, N and P are natural numbers more than or equal to 1;
the piezoelectric transducer comprises a beam body, a first piezoelectric unit and a second piezoelectric unit;
the beam body comprises a vibrating part, a first enlarged part, a second enlarged part, a first end part and a second end part, wherein the first end part and the second end part have the same structure and are both cylinders; the vibrating part is a cylinder with the cross section diameter larger than that of the first end part; the first expanding part and the second expanding part are of the same structure and are round tables, the diameter of the end face with the smaller area is equal to that of the cross section of the first end part, and the diameter of the end face with the larger area is equal to that of the cross section of the vibrating part; the end with smaller area of the first enlarged part is coaxially and fixedly connected with one end of the first end part, and the end with larger surface contact is coaxially and fixedly connected with one end of the vibrating part; the end with the smaller area of the second enlarged part is coaxially and fixedly connected with one end of the second end part, and the end with the larger area is coaxially and fixedly connected with the other end of the vibration part;
the first piezoelectric unit and the second piezoelectric unit respectively comprise Q piezoelectric ceramic pieces, wherein the Q piezoelectric ceramic pieces in the first piezoelectric unit are uniformly arranged on the side wall of the beam body vibration part close to one end of the first expansion part in the circumferential direction, the Q piezoelectric ceramic pieces in the second piezoelectric unit are uniformly arranged on the side wall of the beam body vibration part close to one end of the second expansion part in the circumferential direction, and the Q piezoelectric ceramic pieces in the first piezoelectric unit and the Q piezoelectric ceramic pieces in the second piezoelectric unit are in one-to-one correspondence symmetry;
the piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit are polarized along the thickness direction, and the polarization directions are outward or inward;
the top plate is a rectangular plate;
the first spring piece, the second spring piece, the third spring piece and the third spring piece are all rectangular spring pieces;
the first spring piece and the second spring piece are arranged in parallel, the lower ends of the first spring piece and the second spring piece are fixedly connected with the base, and the upper ends of the first spring piece and the second spring piece are fixedly connected with the first connecting block and the second connecting block respectively;
the third spring piece and the fourth spring piece are arranged in parallel, the lower ends of the third spring piece and the fourth spring piece are fixedly connected with the first connecting block and the second connecting block respectively, and the upper ends of the third spring piece and the fourth spring piece are fixedly connected with two ends of the top plate respectively, so that the top plate is horizontally arranged, and an included angle between the third spring piece and the horizontal plane is not equal to 90 degrees;
two ends of the piezoelectric transducer beam body are respectively and correspondingly fixedly connected with the first connecting block and the second connecting block, and the axis of the piezoelectric transducer is parallel to the edge of the top plate in the length direction;
the adjusting bolt comprises a nut and a stud;
the upper surfaces of the first stopper, the second stopper and the third stopper are respectively provided with M, N and P adjusting grooves, the adjusting grooves are strip-shaped grooves perpendicular to the top plate, the adjusting grooves are respectively provided with strip-shaped through grooves perpendicular to the top plate, the width of each adjusting groove is larger than the diameter of a nut of the adjusting bolt, and the width of each strip-shaped through groove is smaller than the diameter of the nut of the adjusting bolt and larger than the diameter of a stud of the adjusting bolt;
m + N + P positioning threaded blind holes which are in one-to-one correspondence with M adjusting grooves on the first stopper, N adjusting grooves on the second stopper and P adjusting grooves on the third stopper are formed in the upper surface of the top disc;
the M + N + P adjusting bolts penetrate through the M + N + P adjusting grooves in a one-to-one corresponding mode and are in threaded connection with the M + N + P positioning threaded blind holes in a one-to-one corresponding mode, the first blocking piece, the second blocking piece and the third blocking piece are fixed on the top disc, a feeding groove is formed between the first blocking piece and the second blocking piece, a discharging groove is formed between the first blocking piece and the third blocking piece, and a returning groove is formed between the second blocking piece and the third blocking piece; an included angle between the backspacing groove and the discharge groove is an acute angle;
one end of the piezoelectric bimorph is fixedly connected with the third retaining piece, and the other end of the piezoelectric bimorph abuts against the second retaining piece and is used for isolating the feed chute and the backspacing chute under the non-driving state to enable the feed chute to be communicated with the discharge chute, and isolating the feed chute and the discharge chute under the driving state to enable the feed chute to be communicated with the backspacing chute.
As a further optimization scheme of the linear feeding device based on the inertia drive of the piezoelectric transducer, a plurality of clamping keys are uniformly arranged on the side wall of the beam body vibration part in the circumferential direction.
As a further optimized scheme of the linear feeding device based on the inertia drive of the piezoelectric transducer, the piezoelectric ceramic plates in the first piezoelectric unit and the second piezoelectric unit are adhered to the side wall of the vibration part of the beam body through epoxy resin glue.
The cross sections of the feeding groove, the discharging groove and the backspacing groove can be set to be rectangular or isosceles trapezoids with the length of the lower bottom edge larger than that of the upper bottom edge.
The invention also discloses a working method of the piezoelectric-driven longitudinal-bending composite type linear feeding device, which comprises the following steps of:
a feeding groove is arranged between the third spring piece and the discharging groove, if materials are required to be transported from the feeding groove to the discharging groove or the backspacing groove, simple harmonic excitation signals with preset frequency thresholds are applied to all the piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit of the piezoelectric transducer, and the second-order longitudinal vibration mode of the piezoelectric transducer is excited; the piezoelectric transducer transmits vibration to the third spring piece and the fourth spring piece through the connecting block to induce bending vibration of the third spring piece and the fourth spring piece; because the included angle between the third spring leaf and the horizontal plane is not 90 degrees, the top plate moves in the horizontal direction and the vertical direction under the driving of the bending vibration of the third spring leaf and the fourth spring leaf, and then materials are driven to be transported from the feeding groove to the discharging groove or the backspacing groove in the top plate;
if the feeding groove and the backspacing groove need to be isolated, the feeding groove is communicated with the discharging groove, and the piezoelectric bimorph is not driven;
if the feeding groove and the discharging groove are required to be isolated, the feeding groove is communicated with the backspacing groove, and a preset direct current signal is input to the piezoelectric bimorph, so that the piezoelectric bimorph can be bent.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the structure is simple, the design is easy, and the cost of the material conveying device can be reduced;
2. the structure that the piezoelectric transducer is combined with the mass block is adopted, so that the amplitude of the vibration feeding device can be improved, and the material conveying efficiency can be improved;
3. the piezoelectric bimorph is used as a screening device, the characteristic of quick starting of piezoelectric ceramics is utilized, and an image recognition system is combined to improve the screening efficiency, realize an integrated structure of conveying and screening, and simplify the structure;
4. the positions of the first stopper, the second stopper, the third stopper and the feeding groove can be adjusted through the adjusting bolt, and then the widths of the feeding groove, the discharging groove and the backspacing groove can be adjusted.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a piezoelectric transducer according to the present invention;
FIG. 3 is a cross-sectional schematic view of a piezoelectric transducer of the present invention;
FIG. 4 is a schematic illustration of the application of an electrical signal to a piezoelectric transducer in accordance with the present invention;
FIG. 5 is a schematic workflow of the present invention;
FIG. 6 is a schematic diagram showing a comparison between the state when the piezoelectric transducer of the present invention is not driven and the state when it is driven;
FIG. 7 is another schematic construction of the present invention;
FIG. 8 is a schematic representation of a piezoelectric transducer applying an electrical signal in another configuration of the invention.
In the figure, 1-base, 2-first spring, 3-second spring, 4-third spring, 5-fourth spring, 6-first connecting block, 7-second connecting block, 8-piezoelectric transducer, 9-top plate, 10-first stopper, 11-second stopper, 12-third stopper, 13-adjusting bolt, 14-piezoelectric bimorph, 15-end of front beam, 16-end of back beam, 17-enlargement of front beam, 18-enlargement of back beam, 19-first piezoelectric unit, 20-second piezoelectric unit, 21-middle beam, 22-key on middle beam.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components and/or sections, these elements, components and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, and/or section from another. Thus, a first element, component, and/or section discussed below could be termed a second element, component, or section without departing from the teachings of the present invention.
As shown in fig. 1, the invention discloses a linear feeding device based on piezoelectric transducer inertia driving, which comprises a base, first to fourth spring pieces, first to second connecting blocks, a piezoelectric transducer, a top plate, a piezoelectric bimorph, first to third stoppers, and M + N + P adjusting bolts, wherein M, N, and P are natural numbers greater than or equal to 1;
as shown in fig. 2, the piezoelectric transducer includes a front beam, a middle beam, a rear beam, a first piezoelectric unit, a second piezoelectric unit, a first pre-tightening bolt, and a second pre-tightening bolt;
the front beam and the rear beam are identical in structure and respectively comprise an end part, an amplifying part and a root part, wherein the end part and the root part are both cylinders, and the area of the end surface of the end part is smaller than that of the end surface of the root part; the enlarged part is a circular table with the same end face shape at one end and the same end face shape at the other end and the same end face shape at the root, and the end with smaller area of the enlarged part is coaxially fixedly connected with one end of the end part, and the end with larger area is coaxially fixedly connected with one end of the root; the center of the end face of the other end of the end part is provided with a countersunk through hole penetrating through the end part, the amplifying part and the root part along the axis;
the middle beam is a cylinder with the cross section the same as the end face of the root of the front beam, and the centers of the end faces of the two ends of the middle beam are provided with pre-tightening threaded blind holes;
the first piezoelectric unit and the second piezoelectric unit have the same structure and respectively comprise 2Q circular piezoelectric ceramic pieces, wherein Q is a natural number more than or equal to 1; the 2Q circular piezoelectric ceramic pieces are sequentially stacked and polarized along the thickness direction, and the polarization directions of the adjacent piezoelectric ceramic pieces are opposite;
the first pre-tightening bolt sequentially penetrates through the front beam and the first piezoelectric unit from a countersunk through hole of the front beam and then is in threaded connection with a pre-tightening threaded blind hole at one end of the middle beam, and the front beam, the first piezoelectric unit and the middle beam are clamped to be coaxial; the second pre-tightening bolt sequentially penetrates through the rear beam and the second piezoelectric unit from the countersunk through hole of the rear beam and then is in threaded connection with the pre-tightening threaded blind hole at the other end of the middle beam, and the rear beam, the second piezoelectric unit and the middle beam are clamped to be coaxial, as shown in fig. 3;
the top plate is a rectangular plate;
the first spring piece, the second spring piece, the third spring piece and the third spring piece are all rectangular spring pieces;
the first spring piece and the second spring piece are arranged in parallel, the lower ends of the first spring piece and the second spring piece are fixedly connected with the base, and the upper ends of the first spring piece and the second spring piece are fixedly connected with the first connecting block and the second connecting block respectively;
the third spring piece and the fourth spring piece are arranged in parallel, the lower ends of the third spring piece and the fourth spring piece are fixedly connected with the first connecting block and the second connecting block respectively, and the upper ends of the third spring piece and the fourth spring piece are fixedly connected with two ends of the top plate respectively, so that the top plate is horizontally arranged, and an included angle between the third spring piece and the horizontal plane is not equal to 90 degrees;
the ends of the front beam and the rear beam of the piezoelectric transducer are respectively and correspondingly fixedly connected with the first connecting block and the second connecting block, and the axis of the piezoelectric transducer is parallel to the edge of the top plate in the length direction;
the adjusting bolt comprises a nut and a stud;
the upper surfaces of the first stopper, the second stopper and the third stopper are respectively provided with M, N and P adjusting grooves, the adjusting grooves are strip-shaped grooves perpendicular to the top plate, the adjusting grooves are respectively provided with strip-shaped through grooves perpendicular to the top plate, the width of each adjusting groove is larger than the diameter of a nut of the adjusting bolt, and the width of each strip-shaped through groove is smaller than the diameter of the nut of the adjusting bolt and larger than the diameter of a stud of the adjusting bolt;
m + N + P positioning threaded blind holes which are in one-to-one correspondence with M adjusting grooves on the first stopper, N adjusting grooves on the second stopper and P adjusting grooves on the third stopper are formed in the upper surface of the top disc;
the M + N + P adjusting bolts penetrate through the M + N + P adjusting grooves in a one-to-one corresponding mode and are in threaded connection with the M + N + P positioning threaded blind holes in a one-to-one corresponding mode, the first blocking piece, the second blocking piece and the third blocking piece are fixed on the top disc, a feeding groove is formed between the first blocking piece and the second blocking piece, a discharging groove is formed between the first blocking piece and the third blocking piece, and a returning groove is formed between the second blocking piece and the third blocking piece; an included angle between the backspacing groove and the discharge groove is an acute angle;
one end of the piezoelectric bimorph is fixedly connected with the third retaining piece, and the other end of the piezoelectric bimorph abuts against the second retaining piece and is used for isolating the feed chute and the backspacing chute under the non-driving state to enable the feed chute to be communicated with the discharge chute, and isolating the feed chute and the discharge chute under the driving state to enable the feed chute to be communicated with the backspacing chute.
And a plurality of keys for clamping are circumferentially arranged on the front beam, the middle beam and the rear beam.
And Q is 1 preferentially.
The invention also discloses a working method of the linear feeding device based on the inertial drive of the piezoelectric transducer, which comprises the following steps:
the feeding groove is positioned between the third spring piece and the discharging groove, if the materials are required to be transported from the feeding groove to the discharging groove or the backspacing groove, as shown in fig. 4, a simple harmonic excitation signal with a preset frequency is applied to all piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit of the piezoelectric transducer, and a second-order longitudinal vibration mode of the piezoelectric transducer is excited; the piezoelectric transducer transmits vibration to the third spring piece and the fourth spring piece through the connecting block to induce bending vibration of the third spring piece and the fourth spring piece; because the included angle between the third spring leaf and the horizontal plane is not 90 degrees, the top plate moves in the horizontal direction and the vertical direction under the driving of the bending vibration of the third spring leaf and the fourth spring leaf, and then the materials are driven to be transported from the feeding groove to the discharging groove or the returning groove in the top plate, as shown in fig. 5;
if the feeding groove and the backspacing groove need to be isolated, the feeding groove is communicated with the discharging groove, and the piezoelectric bimorph is not driven;
if the feed groove and the discharge groove are required to be isolated, the feed groove is communicated with the backspacing groove, and a preset direct current signal is input to the piezoelectric bimorph, so that the piezoelectric bimorph can be bent, as shown in fig. 6.
As shown in fig. 7, the invention also discloses another linear feeding device based on piezoelectric transducer inertia driving, which comprises a base, first to fourth spring pieces, first to second connecting blocks, a piezoelectric transducer, a top plate, a piezoelectric bimorph, first to third blocking pieces, and M + N + P adjusting bolts, wherein M, N, and P are natural numbers greater than or equal to 1;
the piezoelectric transducer comprises a beam body, a first piezoelectric unit and a second piezoelectric unit;
the beam body comprises a vibrating part, a first enlarged part, a second enlarged part, a first end part and a second end part, wherein the first end part and the second end part have the same structure and are both cylinders; the vibration part is a cylinder with the diameter of the cross section larger than that of the first end part; the first expanding part and the second expanding part are of the same structure and are round tables, the diameter of the end face with the smaller area is equal to that of the cross section of the first end part, and the diameter of the end face with the larger area is equal to that of the cross section of the vibrating part; the end with smaller area of the first enlarged part is coaxially and fixedly connected with one end of the first end part, and the end with larger surface contact is coaxially and fixedly connected with one end of the vibrating part; the end with the smaller area of the second enlarged part is coaxially and fixedly connected with one end of the second end part, and the end with the larger area is coaxially and fixedly connected with the other end of the vibration part;
the first piezoelectric unit and the second piezoelectric unit respectively comprise Q piezoelectric ceramic pieces, wherein the Q piezoelectric ceramic pieces in the first piezoelectric unit are uniformly arranged on the side wall of the beam body vibration part close to one end of the first expansion part in the circumferential direction, the Q piezoelectric ceramic pieces in the second piezoelectric unit are uniformly arranged on the side wall of the beam body vibration part close to one end of the second expansion part in the circumferential direction, and the Q piezoelectric ceramic pieces in the first piezoelectric unit and the Q piezoelectric ceramic pieces in the second piezoelectric unit are in one-to-one correspondence symmetry;
the piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit are polarized along the thickness direction, and the polarization directions are outward or inward;
the top disc is a rectangular plate;
the first spring piece, the second spring piece, the third spring piece and the fourth spring piece are all rectangular spring pieces, and have the same structure;
the first spring piece and the second spring piece are arranged in parallel, the lower ends of the first spring piece and the second spring piece are fixedly connected with the base, and the upper ends of the first spring piece and the second spring piece are fixedly connected with the first connecting block and the second connecting block respectively;
the third spring piece and the fourth spring piece are arranged in parallel, the lower ends of the third spring piece and the fourth spring piece are fixedly connected with the first connecting block and the second connecting block respectively, and the upper ends of the third spring piece and the fourth spring piece are fixedly connected with two ends of the top plate respectively, so that the top plate is horizontally arranged, and an included angle between the third spring piece and the horizontal plane is not equal to 90 degrees;
two ends of the piezoelectric transducer beam body are fixedly connected with the first connecting block and the second connecting block correspondingly, and the axis of the piezoelectric transducer is parallel to the edge of the top plate in the length direction;
the adjusting bolt comprises a nut and a stud;
the upper surfaces of the first stopper, the second stopper and the third stopper are respectively provided with M, N and P adjusting grooves, the adjusting grooves are strip-shaped grooves perpendicular to the top plate, the adjusting grooves are respectively provided with strip-shaped through grooves perpendicular to the top plate, the width of each adjusting groove is larger than the diameter of a nut of the adjusting bolt, and the width of each strip-shaped through groove is smaller than the diameter of the nut of the adjusting bolt and larger than the diameter of a stud of the adjusting bolt;
m + N + P positioning threaded blind holes which correspond to M adjusting grooves in the first stopper, N adjusting grooves in the second stopper and P adjusting grooves in the third stopper one by one are formed in the upper surface of the top disc;
the M + N + P adjusting bolts penetrate through the M + N + P adjusting grooves in a one-to-one corresponding threaded connection with the M + N + P positioning threaded blind holes, the first blocking piece, the second blocking piece and the third blocking piece are fixed on the top plate, so that a feeding groove is formed between the first blocking piece and the second blocking piece, a discharging groove is formed between the first blocking piece and the third blocking piece, and a returning groove is formed between the second blocking piece and the third blocking piece; an included angle between the backspacing groove and the discharge groove is an acute angle;
one end of the piezoelectric bimorph is fixedly connected with the third retaining piece, and the other end of the piezoelectric bimorph abuts against the second retaining piece and is used for isolating the feed chute and the backspacing chute under the non-driving state to enable the feed chute to be communicated with the discharge chute, and isolating the feed chute and the discharge chute under the driving state to enable the feed chute to be communicated with the backspacing chute.
As a further optimization scheme of the linear feeding device based on the inertia drive of the piezoelectric transducer, a plurality of clamping keys are uniformly arranged on the side wall of the beam body vibration part in the circumferential direction.
As a further optimized scheme of the linear feeding device based on the inertia drive of the piezoelectric transducer, the piezoelectric ceramic plates in the first piezoelectric unit and the second piezoelectric unit are adhered to the side wall of the vibration part of the beam body through epoxy resin glue.
The invention also discloses a working method of the piezoelectric-driven longitudinal-bending composite type linear feeding device, which comprises the following steps:
a feeding groove is arranged between the third spring plate and the discharging groove, if materials are required to be transported from the feeding groove to the discharging groove or the backspacing groove, as shown in fig. 8, simple harmonic excitation signals with preset frequency threshold values are applied to all piezoelectric ceramic plates in the first piezoelectric unit and the second piezoelectric unit of the piezoelectric transducer, and a second-order longitudinal vibration mode of the piezoelectric transducer is excited; the piezoelectric transducer transmits vibration to the third spring piece and the fourth spring piece through the connecting block to induce bending vibration of the third spring piece and the fourth spring piece; because the included angle between the third spring leaf and the horizontal plane is not 90 degrees, the top plate moves in the horizontal direction and the vertical direction under the driving of the bending vibration of the third spring leaf and the fourth spring leaf, and then materials are driven to be transported from the feeding groove to the discharging groove or the backspacing groove in the top plate;
if the feeding groove and the backspacing groove need to be isolated, the feeding groove is communicated with the discharging groove, and the piezoelectric bimorph is not driven;
if the feeding groove and the discharging groove are required to be isolated, the feeding groove is communicated with the backspacing groove, and a preset direct current signal is input to the piezoelectric bimorph, so that the piezoelectric bimorph can be bent.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The linear feeding device based on the inertia drive of the piezoelectric transducer is characterized by comprising a base, first to fourth spring pieces, first to second connecting blocks, the piezoelectric transducer, a top plate, a piezoelectric bimorph, first to third stoppers and M + N + P adjusting bolts, wherein M, N and P are natural numbers which are more than or equal to 1;
the piezoelectric transducer comprises a front beam, a middle beam, a rear beam, a first piezoelectric unit, a second piezoelectric unit, a first pre-tightening bolt and a second pre-tightening bolt;
the front beam and the rear beam are identical in structure and respectively comprise an end part, an amplifying part and a root part, wherein the end part and the root part are both cylinders, and the area of the end surface of the end part is smaller than that of the end surface of the root part; the enlargement part is a circular table with the same end face shape at one end and the same end face shape at the other end and the same end face shape at the root part, and the end with smaller area of the enlargement part is coaxially and fixedly connected with one end of the end part, and the end with larger area is coaxially and fixedly connected with one end of the root part; the center of the end face of the other end of the end part is provided with a countersunk through hole penetrating through the end part, the amplifying part and the root part along the axis;
the middle beam is a cylinder with the cross section the same as the end face of the root of the front beam, and the centers of the end faces of the two ends of the middle beam are provided with pre-tightening threaded blind holes;
the first piezoelectric unit and the second piezoelectric unit have the same structure and respectively comprise 2Q circular piezoelectric ceramic pieces, wherein Q is a natural number more than or equal to 1; the 2Q circular piezoelectric ceramic pieces are sequentially stacked and are polarized along the thickness direction, and the polarization directions of the adjacent piezoelectric ceramic pieces are opposite;
the first pre-tightening bolt sequentially penetrates through the front beam and the first piezoelectric unit from the countersunk through hole of the front beam and then is in threaded connection with the pre-tightening threaded blind hole at one end of the middle beam, and the front beam, the first piezoelectric unit and the middle beam are clamped to be coaxial; the second pre-tightening bolt sequentially penetrates through the rear beam and the second piezoelectric unit from the countersunk through hole of the rear beam and then is in threaded connection with the pre-tightening threaded blind hole at the other end of the middle beam, and the rear beam, the second piezoelectric unit and the middle beam are clamped to be coaxial;
the top disc is a rectangular plate;
the first spring piece, the second spring piece, the third spring piece and the third spring piece are all rectangular spring pieces;
the first spring piece and the second spring piece are arranged in parallel, the lower ends of the first spring piece and the second spring piece are fixedly connected with the base, and the upper ends of the first spring piece and the second spring piece are fixedly connected with the first connecting block and the second connecting block respectively;
the third spring piece and the fourth spring piece are arranged in parallel, the lower ends of the third spring piece and the fourth spring piece are fixedly connected with the first connecting block and the second connecting block respectively, and the upper ends of the third spring piece and the fourth spring piece are fixedly connected with the two ends of the top plate respectively, so that the top plate is horizontally arranged, and the included angle between the third spring piece and the horizontal plane is not equal to 90 degrees;
the ends of the front beam and the rear beam of the piezoelectric transducer are respectively and correspondingly fixedly connected with the first connecting block and the second connecting block, and the axis of the piezoelectric transducer is parallel to the edge of the top plate in the length direction;
the adjusting bolt comprises a nut and a stud;
the upper surfaces of the first stopper, the second stopper and the third stopper are respectively provided with M, N and P adjusting grooves, the adjusting grooves are strip-shaped grooves perpendicular to the top plate, the adjusting grooves are respectively provided with strip-shaped through grooves perpendicular to the top plate, the width of each adjusting groove is larger than the diameter of a nut of the adjusting bolt, and the width of each strip-shaped through groove is smaller than the diameter of the nut of the adjusting bolt and larger than the diameter of a stud of the adjusting bolt;
m + N + P positioning threaded blind holes which are in one-to-one correspondence with M adjusting grooves on the first stopper, N adjusting grooves on the second stopper and P adjusting grooves on the third stopper are formed in the upper surface of the top disc;
the M + N + P adjusting bolts penetrate through the M + N + P adjusting grooves in a one-to-one corresponding mode and are in threaded connection with the M + N + P positioning threaded blind holes in a one-to-one corresponding mode, the first blocking piece, the second blocking piece and the third blocking piece are fixed on the top disc, a feeding groove is formed between the first blocking piece and the second blocking piece, a discharging groove is formed between the first blocking piece and the third blocking piece, and a returning groove is formed between the second blocking piece and the third blocking piece; an included angle between the backspacing groove and the discharge groove is an acute angle;
one end of the piezoelectric bimorph is fixedly connected with the third retaining piece, and the other end of the piezoelectric bimorph abuts against the second retaining piece and is used for blocking the feed chute and the backspacing chute under the non-driving state so as to communicate the feed chute with the discharge chute, and blocking the feed chute and the discharge chute under the driving state so as to communicate the feed chute with the backspacing chute.
2. The piezoelectric transducer inertia-driven-based linear feeding device as claimed in claim 1, wherein a plurality of keys for clamping are circumferentially arranged on the front beam, the middle beam and the rear beam.
3. The piezoelectric transducer inertia-based linear feed device of claim 1, wherein Q is 1.
4. The working method of the piezoelectric transducer inertia-driven-based linear feeding device as claimed in claim 1, is characterized by comprising the following steps:
the feeding groove is positioned between the third spring piece and the discharging groove, if materials are required to be transported from the feeding groove to the discharging groove or the backspacing groove, a simple harmonic excitation signal with preset frequency is applied to all piezoelectric ceramics in the first piezoelectric unit and the second piezoelectric unit of the piezoelectric transducer, and a second-order longitudinal vibration mode of the piezoelectric transducer is excited; the piezoelectric transducer transmits vibration to the third spring piece and the fourth spring piece through the connecting block to induce bending vibration of the third spring piece and the fourth spring piece; because the included angle between the third spring leaf and the horizontal plane is not 90 degrees, the top plate moves in the horizontal direction and the vertical direction under the driving of the bending vibration of the third spring leaf and the fourth spring leaf, and then materials are driven to be transported from the feeding groove to the discharging groove or the backspacing groove in the top plate;
if the feeding groove and the backspacing groove need to be isolated, the feeding groove is communicated with the discharging groove, and the piezoelectric bimorph is not driven;
if the feed chute and the discharge chute are required to be isolated, the feed chute is communicated with the backspacing chute, and a preset direct current signal is input to the piezoelectric bimorph, so that the piezoelectric bimorph can be bent.
5. The linear feeding device based on piezoelectric transducer inertia driving is characterized by comprising a base, first to fourth spring pieces, first to second connecting blocks, a piezoelectric transducer, a top plate, a piezoelectric bimorph, first to third blocking pieces and M + N + P adjusting bolts, wherein M, N and P are natural numbers more than or equal to 1;
the piezoelectric transducer comprises a beam body, a first piezoelectric unit and a second piezoelectric unit;
the beam body comprises a vibrating part, a first enlarged part, a second enlarged part, a first end part and a second end part, wherein the first end part and the second end part have the same structure and are both cylinders; the vibration part is a cylinder with the diameter of the cross section larger than that of the first end part; the first expanding part and the second expanding part are of the same structure and are round tables, the diameter of the end face with the smaller area is equal to that of the cross section of the first end part, and the diameter of the end face with the larger area is equal to that of the cross section of the vibrating part; the end with smaller area of the first enlarged part is coaxially and fixedly connected with one end of the first end part, and the end with larger surface contact is coaxially and fixedly connected with one end of the vibrating part; the end with the smaller area of the second enlarged part is coaxially and fixedly connected with one end of the second end part, and the end with the larger area is coaxially and fixedly connected with the other end of the vibrating part;
the first piezoelectric unit and the second piezoelectric unit respectively comprise Q piezoelectric ceramic pieces, wherein the Q piezoelectric ceramic pieces in the first piezoelectric unit are uniformly arranged on the side wall of the beam body vibration part close to one end of the first expansion part in the circumferential direction, the Q piezoelectric ceramic pieces in the second piezoelectric unit are uniformly arranged on the side wall of the beam body vibration part close to one end of the second expansion part in the circumferential direction, and the Q piezoelectric ceramic pieces in the first piezoelectric unit and the Q piezoelectric ceramic pieces in the second piezoelectric unit are in one-to-one correspondence symmetry;
the piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit are polarized along the thickness direction, and the polarization directions are outward or inward;
the top disc is a rectangular plate;
the first spring piece, the second spring piece, the third spring piece and the fourth spring piece are all rectangular spring pieces, and have the same structure;
the first spring piece and the second spring piece are arranged in parallel, the lower ends of the first spring piece and the second spring piece are fixedly connected with the base, and the upper ends of the first spring piece and the second spring piece are fixedly connected with the first connecting block and the second connecting block respectively;
the third spring piece and the fourth spring piece are arranged in parallel, the lower ends of the third spring piece and the fourth spring piece are fixedly connected with the first connecting block and the second connecting block respectively, and the upper ends of the third spring piece and the fourth spring piece are fixedly connected with two ends of the top plate respectively, so that the top plate is horizontally arranged, and an included angle between the third spring piece and the horizontal plane is not equal to 90 degrees;
two ends of the piezoelectric transducer beam body are fixedly connected with the first connecting block and the second connecting block correspondingly, and the axis of the piezoelectric transducer is parallel to the edge of the top plate in the length direction;
the adjusting bolt comprises a nut and a stud;
the upper surfaces of the first stopper, the second stopper and the third stopper are respectively provided with M, N and P adjusting grooves, the adjusting grooves are strip-shaped grooves perpendicular to the top plate, the adjusting grooves are respectively provided with strip-shaped through grooves perpendicular to the top plate, the width of each adjusting groove is larger than the diameter of a nut of the adjusting bolt, and the width of each strip-shaped through groove is smaller than the diameter of the nut of the adjusting bolt and larger than the diameter of a stud of the adjusting bolt;
m + N + P positioning threaded blind holes which are in one-to-one correspondence with M adjusting grooves on the first stopper, N adjusting grooves on the second stopper and P adjusting grooves on the third stopper are formed in the upper surface of the top disc;
the M + N + P adjusting bolts penetrate through the M + N + P adjusting grooves in a one-to-one corresponding mode and are in threaded connection with the M + N + P positioning threaded blind holes in a one-to-one corresponding mode, the first blocking piece, the second blocking piece and the third blocking piece are fixed on the top disc, a feeding groove is formed between the first blocking piece and the second blocking piece, a discharging groove is formed between the first blocking piece and the third blocking piece, and a returning groove is formed between the second blocking piece and the third blocking piece; an included angle between the backspacing groove and the discharge groove is an acute angle;
one end of the piezoelectric bimorph is fixedly connected with the third retaining piece, and the other end of the piezoelectric bimorph abuts against the second retaining piece and is used for blocking the feed chute and the backspacing chute under the non-driving state so as to communicate the feed chute with the discharge chute, and blocking the feed chute and the discharge chute under the driving state so as to communicate the feed chute with the backspacing chute.
6. The linear feeding device based on the inertial drive of the piezoelectric transducer as claimed in claim 5, wherein the side wall of the vibrating portion of the beam body is uniformly provided with a plurality of keys for clamping along the circumference.
7. The linear feeding device based on the inertial drive of the piezoelectric transducer as claimed in claim 5, wherein the piezoelectric ceramic plates of the first piezoelectric unit and the second piezoelectric unit are adhered to the side wall of the vibration part of the beam body by epoxy resin glue.
8. The working method of the piezoelectric-driven buckling composite type linear feeding device based on claim 6 is characterized by comprising the following steps of:
the feeding groove is positioned between the third spring piece and the discharging groove, if materials are required to be transported from the feeding groove to the discharging groove or the backspacing groove, a simple harmonic excitation signal with a preset frequency threshold value is applied to all piezoelectric ceramic pieces in the first piezoelectric unit and the second piezoelectric unit of the piezoelectric transducer, and a second-order longitudinal vibration mode of the piezoelectric transducer is excited; the piezoelectric transducer transmits vibration to the third spring piece and the fourth spring piece through the connecting block to induce bending vibration of the third spring piece and the fourth spring piece; because the included angle between the third spring leaf and the horizontal plane is not 90 degrees, the top plate moves in the horizontal direction and the vertical direction under the driving of the bending vibration of the third spring leaf and the fourth spring leaf, and then materials are driven to be transported from the feeding groove to the discharging groove or the backspacing groove in the top plate;
if the feeding groove and the backspacing groove need to be isolated, the feeding groove is communicated with the discharging groove, and the piezoelectric bimorph is not driven;
if the feed chute and the discharge chute are required to be isolated, the feed chute is communicated with the backspacing chute, and a preset direct current signal is input to the piezoelectric bimorph, so that the piezoelectric bimorph can be bent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211514761.XA CN115924500A (en) | 2022-11-30 | 2022-11-30 | Linear feeding device and method based on piezoelectric transducer inertia driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211514761.XA CN115924500A (en) | 2022-11-30 | 2022-11-30 | Linear feeding device and method based on piezoelectric transducer inertia driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115924500A true CN115924500A (en) | 2023-04-07 |
Family
ID=86700166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211514761.XA Pending CN115924500A (en) | 2022-11-30 | 2022-11-30 | Linear feeding device and method based on piezoelectric transducer inertia driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115924500A (en) |
-
2022
- 2022-11-30 CN CN202211514761.XA patent/CN115924500A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1018126B (en) | Piezo-electric motor | |
| US8434659B2 (en) | Bonding device, ultrasonic transducer, and bonding method | |
| CN1874135A (en) | Vibration wave motor | |
| CN106602927B (en) | A kind of resonance square-wave synchronous clamper piezoelectric linear motor | |
| CN104485837B (en) | A kind of composite oscillator standing-wave ultrasonic motor and its motivational techniques | |
| CN104518703A (en) | Macro/micro driving cymbal linear piezoelectric motor and driving method thereof | |
| CA3034963A1 (en) | Piezoelectric actuator, underwater acoustic transducer and method for producing underwater acoustic transducer | |
| CN115744093A (en) | Surface-mounted piezoelectric-driven longitudinal-torsional composite rotary feeding device and method | |
| CN115924500A (en) | Linear feeding device and method based on piezoelectric transducer inertia driving | |
| TW201711940A (en) | Linear feeding machine capable of conveying an object to be conveyed on a trough at a stable conveying speed | |
| CN101117174A (en) | Ultrasonic vibration feeder driven by longitudinal-torsional hybrid energy converter | |
| CN112443320A (en) | Remote detection dipole logging transducer | |
| CN115724136A (en) | Sandwich type piezoelectric driving linear vibration feeding device and working method thereof | |
| CN107238730B (en) | Piezoelectric high-frequency vibration table | |
| CN115924424A (en) | Piezoelectric transducer driven rotary feeding device and working method thereof | |
| CN112383242B (en) | Linear ultrasonic motor stator with empennage and thin plate frame structure and excitation method thereof | |
| CN115818131A (en) | Piezoelectrically-driven longitudinal-bending composite linear feeding device and working method thereof | |
| JP2002302232A (en) | Piezoelectric element driving type feeder | |
| CN115724135A (en) | In-plane traveling wave type linear feeding device and working method thereof | |
| CN115744089A (en) | Bending vibration composite type rotary material conveying device and working method thereof | |
| CN211448666U (en) | Remote detection dipole logging transducer | |
| CN115947045A (en) | Vertically-arranged longitudinal-bending composite rotary feeding device and working method thereof | |
| JP2006044944A (en) | Piezoelectrically driven part feeder | |
| JPS62298189A (en) | Piezoelectric actuator | |
| CN209814991U (en) | Ultrasonic vibration feeder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |