CN113617622A - Ultrasonic knife handle based on solid piezoelectric ceramic piece - Google Patents
Ultrasonic knife handle based on solid piezoelectric ceramic piece Download PDFInfo
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- CN113617622A CN113617622A CN202110925427.2A CN202110925427A CN113617622A CN 113617622 A CN113617622 A CN 113617622A CN 202110925427 A CN202110925427 A CN 202110925427A CN 113617622 A CN113617622 A CN 113617622A
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- pressing block
- piezoelectric ceramic
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- 239000000919 ceramic Substances 0.000 title claims abstract description 49
- 239000007787 solid Substances 0.000 title claims abstract description 21
- 238000003825 pressing Methods 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 230000009467 reduction Effects 0.000 claims description 23
- 210000004907 gland Anatomy 0.000 claims description 16
- 238000013016 damping Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000008358 core component Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
- B06B1/0633—Cylindrical array
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B3/02—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving a change of amplitude
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/027—Driving main working members reciprocating members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic knife handle based on a solid piezoelectric ceramic piece, which comprises a shell, an ultrasonic transducer, an amplitude transformer, a wireless power transmission unit and a fixing unit, wherein the ultrasonic transducer comprises a sleeve, a pressing block, a fastening unit, a plurality of electrode plates and a plurality of piezoelectric ceramic pieces, wherein a plurality of piezoceramics pieces are solid cylindric structure, a plurality of electrode slices and a plurality of piezoceramics pieces are fixed to be set up between telescopic inner chamber bottom and briquetting along axial NULL, fastening unit is used for briquetting fixed connection on telescopic top terminal surface, a plurality of electrode slices are connected with the wireless power transmission unit electricity, telescopic top sets up in the top of the inner chamber of shell, fixed unit fixed connection is in the inner chamber of shell with sleeve axial fixity in bottom port department of the inner chamber of shell, telescopic bottom is connected at the top of amplitude transformer, the bottom of amplitude transformer is used for connecting the cutter. The invention can ensure the continuity of ultrasonic transmission, reduce the ultrasonic dissipation and improve the transmission efficiency of ultrasonic energy.
Description
Technical Field
The invention relates to the technical field of ultrasonic processing, in particular to an ultrasonic knife handle based on a solid piezoelectric ceramic piece.
Background
In the design of the ultrasonic transducer, the position of the transducer fixing flange is located at a node with zero amplitude, so that the vibration on the transducer is prevented from being transmitted to the shell of the ultrasonic tool handle, and once the ultrasonic vibration is transmitted to a machine tool spindle connected behind the ultrasonic tool handle through the tool handle, the rotation of the spindle is influenced, and key core components such as a machine tool spindle bearing and the like are damaged. However, due to the fact that the parts in practical application have cavities, irregular shapes and the like, the positions of the nodes on the practical transducer cannot be accurately calculated through a theoretical calculation formula, and therefore ultrasonic energy is transmitted to the tool shank more or less under normal conditions.
The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
In order to solve the technical problems, the invention provides an ultrasonic knife handle based on a solid piezoelectric ceramic piece, which can ensure the continuity of ultrasonic transmission, reduce ultrasonic dissipation and improve the transmission efficiency of ultrasonic energy.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses an ultrasonic knife handle based on a solid piezoelectric ceramic piece, which comprises a shell, an ultrasonic transducer, an amplitude transformer, a wireless power transmission unit and a fixing unit, wherein the ultrasonic transducer comprises a sleeve, a pressing block, a fastening unit, a plurality of electrode pieces and a plurality of piezoelectric ceramic pieces, the plurality of piezoelectric ceramic pieces are of a solid cylindrical structure, the plurality of electrode pieces and the plurality of piezoelectric ceramic pieces are axially and alternately arranged and fixedly arranged between the bottom of an inner cavity of the sleeve and the pressing block, the fastening unit is used for fixedly connecting the pressing block to the top end surface of the sleeve, the plurality of electrode pieces are electrically connected with the wireless power transmission unit, the top of the sleeve is arranged at the top of the inner cavity of the shell, the fixing unit is fixedly connected to a bottom port of the inner cavity of the shell so as to axially fix the sleeve in the inner cavity of the shell, the top of the amplitude transformer is connected to the bottom of the sleeve, and the bottom of the amplitude transformer is used for connecting a cutter.
Preferably, the fixing unit comprises a gland and at least one group of nested modules, the at least one group of nested modules are connected between the outer wall of the sleeve and the inner cavity of the shell, the at least one group of nested modules are connected in a mutually nested mode, and the gland is pressed at the outer end face of the at least one group of nested modules and is fixedly connected to the opening end of the inner cavity of the shell.
Preferably, the at least one group of nested modules comprises a first nested module, the first nested module comprises a conical fixed block and a first threaded pressing block, a first flange is arranged on the outer wall of the sleeve, a conical inner hole is formed in the inner cavity of the shell, the conical fixed block is correspondingly arranged at the conical inner hole and is fixed through the inner end face of the first flange in a clamping mode, and the first threaded pressing block is pressed on the outer end face of the first flange and is fixed at the opening end of the inner hole of the conical fixed block through threaded connection.
Preferably, the at least one set of nested modules further includes at least one set of second nested modules, each set of second nested modules respectively includes a vibration reduction ring and a second threaded pressing block, at least one vibration reduction ring is respectively connected and disposed between the first flange and the conical fixing block, the second threaded pressing block is press-fitted on the outer end face of the first flange or the outer end face of the vibration reduction ring of the adjacent inner layer and is fixed on the corresponding inner hole opening end of the vibration reduction ring through threaded connection, wherein the first threaded pressing block is press-fitted on the outer end face of the first flange through at least one vibration reduction ring.
Preferably, a second step is arranged on the inner wall of the vibration reduction ring, a second flange is arranged on the outer wall of the vibration reduction ring, the second step is clamped and abutted against the inner end face of the first flange or the inner end face of the second flange of the vibration reduction ring of the adjacent inner layer, and the second threaded pressing block is pressed and combined on the outer end face of the first flange or the outer end face of the second flange of the vibration reduction ring of the adjacent inner layer.
Preferably, a first step is arranged in an inner hole of the conical fixed block, and the first step is clamped and abutted against an inner end face of the first flange or an inner end face of the second flange of the vibration damping ring of an adjacent inner layer.
Preferably, an air inlet hole is formed in the pressing block, and an air outlet hole is formed in the sleeve, so that an air cooling system of the ultrasonic transducer is formed through the air inlet hole and the air outlet hole.
Preferably, the ultrasonic transducer further comprises a sealing ring, a groove is formed in the outer wall of the pressing block, and the sealing ring is arranged in the groove so that the contact position of the outer wall of the pressing block and the inner cavity of the sleeve is in sealing contact.
Preferably, the shape and the size of the position, in which the bottom of the inner cavity of the sleeve is contacted with the piezoelectric ceramic plate, are the same as those of the piezoelectric ceramic plate.
Preferably, the shape and size of the position where the pressing block is contacted with the piezoelectric ceramic piece are the same as those of the piezoelectric ceramic piece.
Compared with the prior art, the invention has the beneficial effects that: according to the ultrasonic knife handle based on the solid piezoelectric ceramic piece, the piezoelectric ceramic piece in the ultrasonic transducer is of the solid cylindrical structure, so that the pressing block uniformly applies axial pressing force and is fixed in the sleeve of the ultrasonic transducer, the structure of the ultrasonic transducer is more compact, the ultrasonic transmission continuity is ensured, the ultrasonic dissipation caused by local bending vibration of the hollow position of the annular piezoelectric ceramic piece is reduced, and the ultrasonic energy transmission efficiency is improved.
In a further aspect, the invention has the following advantages:
the fixing unit comprises at least one group of nested modules, so that the ultrasonic transducer is fixed in the cavity of the shell through the at least one group of nested modules, and the ultrasonic vibration transmitted to the tool handle is weakened.
The piezoelectric ceramic plate and the electrode which are provided with the solid cylindrical structure are combined, so that the ultrasonic transducer with the relative sealing structure is more convenient to combine with an air cooling system to solve the heat dissipation problem of the transducer.
On the basis of the piezoelectric ceramic piece with the solid cylindrical structure, the bottom of the inner cavity of the sleeve, which is in contact with the piezoelectric ceramic piece, and the shape and the size of the pressing block are the same as those of the piezoelectric ceramic piece, so that pressure can be further uniformly applied to the piezoelectric ceramic piece, the ultrasonic vibration effect cannot be influenced, and the possibility of crushing the piezoelectric ceramic piece is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic scalpel handle according to a first embodiment of the invention;
FIG. 2 is a schematic view of the horn of the ultrasonic blade handle of FIG. 1;
FIG. 3 is a schematic structural view of a housing of the ultrasonic blade handle of FIG. 1;
FIG. 4 is a schematic view of the ultrasonic transducer of the ultrasonic blade handle of FIG. 1;
FIG. 5 is a schematic view of the sleeve of FIG. 4;
FIG. 6 is a schematic structural view of a tapered fixing block of the ultrasonic blade handle of FIG. 1;
FIG. 7 is a schematic structural view of the back compact of FIG. 4;
fig. 8 is a schematic structural view of an ultrasonic scalpel handle according to a second embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed function or a circuit/signal communication function.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the preferred embodiment of the invention, the ultrasonic knife handle based on the solid piezoelectric ceramic plate comprises a shell, an ultrasonic transducer, an amplitude transformer, a wireless power transmission unit and a fixing unit, wherein the wireless power transmission unit consists of a power transmitting primary side and a power receiving secondary side, the ultrasonic transducer is arranged in an inner cavity of the shell and comprises a sleeve, a pressing block, a fastening unit, a plurality of electrode plates and a plurality of piezoelectric ceramic plates, the plurality of piezoelectric ceramic plates are of a solid cylindrical structure, the plurality of electrode plates and the plurality of piezoelectric ceramic plates are axially and alternately arranged and fixedly arranged between the bottom of the inner cavity of the sleeve and the pressing block, the fastening unit is used for fixedly connecting the pressing block to the top end surface of the sleeve, the plurality of electrode plates are electrically connected with the power receiving secondary side, the top of the sleeve is arranged at the top of the inner cavity of the shell, the fixing unit is fixedly connected to the bottom port of the inner cavity of the shell so as to axially fix the sleeve in the inner cavity of the shell, the top of the amplitude transformer is connected to the bottom of the sleeve, and the bottom of the amplitude transformer is used for connecting a cutter. In addition, the electric energy receiving auxiliary edge is connected and arranged on the outer surface of the shell, and the electric energy transmitting circular edge is fixed on the main shaft of the machine tool and is electrically connected with an ultrasonic generator.
In a further embodiment, the fixing unit comprises a gland and at least one group of nested modules, the at least one group of nested modules are connected between the outer wall of the sleeve and the inner cavity of the shell, the at least one group of nested modules are connected with each other in a nested manner, and the gland is pressed at the outer end face of the at least one group of nested modules and is fixedly connected to the opening end of the inner cavity of the shell.
In some embodiments, the at least one set of nested modules only comprises one set of first nested modules, each first nested module comprises a conical fixed block and a first threaded pressing block, a flange is arranged on the outer wall of the sleeve, a step is arranged in the inner hole of the conical fixed block, the sleeve flange is clamped and abutted against the step of the conical fixed block, the first threaded pressing block is pressed on the outer end face of the sleeve flange and is fixedly connected with the opening end of the inner hole of the conical fixed block in a threaded manner, so that the ultrasonic transducer is connected with the conical fixed block; the ultrasonic transducer comprises a shell, a conical fixing block, a gland and an ultrasonic transducer, wherein a conical inner hole is formed in an inner cavity of the shell, the conical fixing block is fixed at the conical inner hole and matched with the conical inner hole in a conical mode, the gland is pressed on the outer end face of the conical fixing block and fixed at the opening end of the inner cavity of the shell in a threaded connection mode, and the ultrasonic transducer and the conical fixing block are installed and fixed in the inner cavity of the shell.
In some embodiments, at least one group of nested modules comprises at least one group of second nested modules besides a group of first nested modules, the first nested modules comprise conical fixed blocks and first threaded pressing blocks, each group of second nested modules respectively comprises a damping ring and a second threaded pressing block, each group of second nested modules are mutually nested and connected between the sleeve and the first nested module, a first flange is arranged on the outer wall of the sleeve, a second step is arranged on the inner wall of the damping ring, a second flange is arranged on the outer wall, the first flange is clamped and pressed at the second step of the damping ring of the innermost layer of second nested modules, the second threaded pressing block of the innermost layer of second nested modules is pressed on the outer end face of the first flange and is fixed at the opening end of the inner hole of the corresponding damping ring in a threaded connection manner, the second flange of the damping ring of each layer of second nested modules is clamped and pressed at the second step of the damping ring of the adjacent inner layer, second threaded pressing blocks of the second nested modules of each layer are pressed on the outer end faces of the vibration damping rings of the adjacent inner layers in a pressing mode and are fixed at the opening ends of the inner holes of the corresponding vibration damping rings in a threaded connection mode; a first step is arranged in an inner hole of the conical fixed block, a second flange of the vibration damping ring of the second nesting module at the outermost layer is clamped and abutted against the first step of the conical fixed block, and a first threaded pressing block is pressed on the outer end face of the second flange of the vibration damping ring of the second nesting module at the outermost layer and is fixedly connected with the opening end of the inner hole of the conical fixed block in a threaded manner so as to connect the ultrasonic transducer with the conical fixed block; the ultrasonic transducer comprises a shell, a conical fixing block, a gland and an ultrasonic transducer, wherein a conical inner hole is formed in an inner cavity of the shell, the conical fixing block is fixed at the conical inner hole and matched with the conical inner hole in a conical mode, the gland is pressed on the outer end face of the conical fixing block and fixed at the opening end of the inner cavity of the shell in a threaded connection mode, and the ultrasonic transducer and the conical fixing block are installed and fixed in the inner cavity of the shell.
In a further embodiment, the pressure block is provided with an air inlet hole, the sleeve is provided with an air outlet hole, the front end surface of the sleeve is provided with a threaded hole, and the amplitude transformer is fixed on the transducer through threaded connection.
In a further embodiment, the diameters of the front end and the rear end of the amplitude transformer are different, the transition structure is in a circular arc shape, a conical shape or a step shape, the rear end is provided with external threads and fixedly connected with the front end of the ultrasonic transducer, and the front section of the amplitude transformer is provided with a cutter connecting structure, such as a taper hole or a hot-installation hole.
In the preferred embodiment of the invention, by adopting the piezoelectric ceramic material with the solid cylindrical structure, wherein the piezoelectric ceramic pieces provide an alternating electric field through the electrodes, the alternating electric field can be directly applied without an excitation coil,
the structure of the piezoelectric ultrasonic transducer in the prior art is mostly a sandwich type piezoelectric transducer adopting an annular piezoelectric ceramic piece, for the application of ultrasonic processing, the limit of the machine tool processing space and the factors of the self weight, the processing precision, the dynamic balance and the like of the tool handle are considered, the tool handle is not suitable to be too long, and under the condition, the influence of the hollow part on the distribution of the vibration nodal surface and the output end can not be ignored generally.
The ultrasonic scalpel handle based on the solid piezoelectric ceramic plate disclosed by the preferred embodiment of the invention is further described by the following specific embodiment.
Example one
As shown in fig. 1, a schematic structural diagram of an ultrasonic knife handle based on a solid piezoelectric ceramic plate according to an embodiment of the present invention includes a housing 1, an ultrasonic transducer 2, an amplitude transformer 3, a wireless power transmission unit composed of a primary power transmission side 4 and a secondary power reception side 5, a conical fixing block 6, a threaded pressing block 7, and a pressing cover 8. The ultrasonic transducer 2 is arranged in the inner cavity of the shell 1, the electric energy receiving secondary side 5 is connected and arranged on the outer surface of the shell 1, the electric energy receiving secondary side 5 is electrically connected with the ultrasonic transducer 2, and the electric energy transmitting primary side 4 is fixed on a machine tool main shaft and is electrically connected with an ultrasonic generator. Referring to fig. 2, the large-diameter end and the small-diameter end of the horn 3 are in a circular arc transition mode, and are fixedly connected with the front end of the ultrasonic transducer 2 through rear-end threads 301, a tapered hole 303 is formed in the front end of the horn 3, and threads 302 are formed on the outer circumferential surface of the horn and can be matched with a spring chuck and a press cap of a standard industrial part to clamp a cutter.
The primary electric energy transmitting side 4 transmits a high-frequency electric signal generated by the ultrasonic generator to the secondary electric energy receiving side 5 in an inductive coupling mode, the secondary electric energy receiving side 5 transmits the high-frequency electric signal to the ultrasonic transducer 2, the ultrasonic transducer 2 is powered, the electric signal is converted into high-frequency mechanical vibration by utilizing the piezoelectric inverse effect of a piezoelectric ceramic piece in the ultrasonic transducer 2, and the mechanical vibration is amplified by multiple times through the amplitude transformer 3.
Referring to fig. 3, the housing 1, which has a fixed interface 101 at one end for connecting with a spindle of a machine tool, may have standard sizes of various specifications, including but not limited to BT30, BT40, HSK63A, ISO20, etc., and may be directly assembled in a machining center, which is BT40 specification in this embodiment; the other end of the ultrasonic transducer is cylindrical, the outer wall of the cylindrical end is provided with a step 105 and a through hole 106, the electric energy receiving secondary side 5 is arranged at the step 105, and a cable connected with the ultrasonic transducer 2 and the electric energy receiving secondary side 5 penetrates through the through hole 106; the inside cavity 107 that is equipped with conical bore 102 in the cavity 107, and conical bore 102 adopts the circular cone cooperation with toper fixed block 6, and the open end of cavity 107 is equipped with internal thread 104, and internal thread 104 and gland 8's screw-thread fit, gland 8 compress tightly the outer terminal surface department of toper fixed block 6.
Referring to fig. 4, the ultrasonic transducer 2 includes a sleeve 201, a back press block 202, a plurality of fasteners 203, a plurality of electrode pads 204, and a plurality of piezoceramic wafers 205. The plurality of electrode plates 204 and the plurality of piezoelectric ceramic pieces 205 are axially and alternately arranged and fixedly installed between the bottom of the inner cavity of the sleeve 201 and the rear pressing block 202, the plurality of electrode plates 204 are electrically connected with the electric energy receiving secondary side 4, the plurality of fasteners 203 are used for fixedly connecting the rear pressing block 202 with the rear end face of the sleeve 201, and the lower end face of the rear pressing block 202 can be uniformly pressed on the electrode plates 204 and the piezoelectric ceramic pieces 205 by screwing the plurality of fasteners 203. The piezoelectric ceramic piece 205 is in a solid cylinder shape, and is different from a common sandwich type transducer in that a rear cover plate of the transducer is compressed by annular piezoelectric ceramic matched with a screw, and the structure can cause local bending vibration at a hollow position to cause ultrasonic dissipation. The sandwich piezoelectric transducer in the prior art mostly adopts a circular piezoelectric ceramic piece, pressure is applied by a pressure cap part of a bolt, so that the force application is uneven, the effect generated by ultrasonic vibration is influenced for a piezoelectric ultrasonic transducer with the principle of inverse piezoelectric effect, and if the applied force is large, the piezoelectric ceramic piece can be cracked due to uneven pressure distribution; in the present embodiment, the diameter of the contact portion between the back pressing block 202 and the piezoelectric ceramic plate 205 is the same as the diameter of the piezoelectric ceramic plate 205, and pressure is uniformly applied to the piezoelectric ceramic plate 205, so that the ultrasonic vibration effect is not affected and the possibility of breaking the piezoelectric ceramic plate is avoided.
With reference to fig. 5 and 6, a flange 2011 is arranged on the outer wall of the sleeve 201, two air outlet holes 2013 penetrating through the inner cavity are symmetrically arranged, and a threaded hole 2014 is formed in the front end face of the sleeve. The outer wall of the conical fixing block 6 is conical 601, a step 602 is arranged in the inner hole, and an inner thread 603 is arranged at the opening end of the inner hole. The sleeve flange 2011 is clamped against the step 602, and the threaded pressing block 7 is pressed on the outer end face of the sleeve flange 2011 and is fixedly connected with the internal thread 603 at the opening end of the inner hole of the conical fixing block 6; the conical inner hole 102 in the inner cavity 107 of the shell is in conical fit with the outer wall 601 of the conical fixing block to axially and radially position the conical fixing block 6, the additional nested structure, namely the conical fixing block 6 indirectly and fixedly connects the ultrasonic transducer 2 with the shell 1, can weaken the ultrasonic vibration transmitted to the knife handle shell 1 by the ultrasonic transducer 2 (wherein, the path for ultrasonic transmission is increased, so that a small amount of ultrasonic vibration dissipated by a transducer flange is lost when being transmitted layer by layer in the nested structure, and the transducer flange is prevented from being in direct contact with the knife handle), and avoid the ultrasonic vibration from being transmitted to a machine tool spindle connected behind the tool spindle through the knife handle shell 1, even damaging key core components such as a machine tool spindle bearing and the like; the gland 8 is pressed on the outer end face of the conical fixed block 6 and is fixedly connected with the internal thread 104 at the opening end of the shell, so that the transducer 2 and the conical fixed block 6 are installed and fixed in the inner cavity 107 of the shell; the rear end thread 301 of the amplitude transformer 3 is matched with the threaded hole 2014 in the front end face of the sleeve, and the amplitude transformer 3 is fixedly connected with the transducer 2.
Referring to fig. 7, the rear pressing block 202 has an air inlet 2021, an outer wall has a mounting groove 2022, and an O-ring is mounted at the mounting groove 2022 to prevent the cooling air from leaking from the inner cavity of the sleeve 201.
The cooling gas path in the present invention is: the cooling gas flows into the inner cavity of the sleeve 201 from the air inlet holes 2021 on the rear pressure block 202 and flows out from the air outlet holes 2013 of the sleeve 201.
Example two
As shown in fig. 8, the structure of an ultrasonic scalpel handle based on a solid piezoelectric ceramic plate according to a second embodiment of the present invention is schematically illustrated, and the difference between the present embodiment and the first embodiment is: firstly, the fixed interface 101 of the housing 1 is in the specification of HSK 63A; secondly, the transducer 2 is fixedly connected in the inner cavity of the shell 1 by adopting a multilayer nesting method, so that the ultrasonic vibration of the transducer 2 is further weakened to be transmitted to the shell 1, the ultrasonic vibration is prevented from being transmitted to a machine tool spindle connected behind the transducer through the tool holder shell 1, and even key core components such as a machine tool spindle bearing and the like are damaged, specifically, compared with the embodiment I, the vibration reduction ring 9 and the screw gland 10 are additionally arranged, the flange of the transducer 2 is clamped and pressed at the step of the inner hole of the vibration reduction ring 9, the screw gland 10 is pressed at the flange of the transducer 2 and fixedly connected with the inner thread of the opening end of the vibration reduction ring 9, the flange of the vibration reduction ring 9 is clamped and pressed at the step of the inner hole of the conical fixing block 6, and the screw gland 7 is pressed at the flange of the vibration reduction ring 9 and fixedly connected with the inner thread opening end of the conical fixing block 6; thirdly, the transition mode of the large-diameter end and the small-diameter end of the amplitude transformer 3 is conical, and the front-end cutter connecting structure is a hot charging hole.
The background of the invention may contain background information related to the problem or environment of the present invention rather than the prior art described by others. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. An ultrasonic knife handle based on a solid piezoelectric ceramic piece is characterized by comprising a shell, an ultrasonic transducer, an amplitude transformer, a wireless power transmission unit and a fixing unit, wherein the ultrasonic transducer comprises a sleeve, a pressing block, a fastening unit, a plurality of electrode plates and a plurality of piezoelectric ceramic pieces, the plurality of piezoelectric ceramic pieces are of a solid cylindrical structure, the plurality of electrode plates and the plurality of piezoelectric ceramic pieces are axially and alternately arranged and fixedly arranged between the bottom of an inner cavity of the sleeve and the pressing block, the fastening unit is used for fixedly connecting the pressing block to the top end face of the sleeve, the plurality of electrode plates are electrically connected with the wireless power transmission unit, the top of the sleeve is arranged at the top of the inner cavity of the shell, the fixing unit is fixedly connected to a bottom port of the inner cavity of the shell so as to axially fix the sleeve in the inner cavity of the shell, the top of the amplitude transformer is connected to the bottom of the sleeve, and the bottom of the amplitude transformer is used for connecting a cutter.
2. The ultrasonic knife handle of claim 1, wherein the fixing unit comprises a gland and at least one set of nested modules, the at least one set of nested modules are connected between the outer wall of the sleeve and the inner cavity of the housing and are connected with each other in a nested manner, and the gland is pressed at the outer end face of the at least one set of nested modules and is fixedly connected with the opening end of the inner cavity of the housing.
3. The ultrasonic knife handle according to claim 2, wherein the at least one set of nested modules comprises a first nested module, the first nested module comprises a conical fixing block and a first threaded pressing block, a first flange is arranged on the outer wall of the sleeve, a conical inner hole is arranged in the inner cavity of the housing, the conical fixing block is correspondingly arranged at the conical inner hole and is clamped and fixed through the inner end face of the first flange, and the first threaded pressing block is pressed on the outer end face of the first flange and is fixed at the opening end of the inner hole of the conical fixing block through threaded connection.
4. The ultrasonic tool handle according to claim 3, wherein the at least one set of nested modules further comprises at least one set of second nested modules, each set of second nested modules respectively comprises a vibration reduction ring and a second threaded pressing block, at least one vibration reduction ring is respectively connected and arranged between the first flange and the conical fixing block, the second threaded pressing block is pressed on the outer end face of the first flange or the outer end face of the vibration reduction ring of the adjacent inner layer and is fixed at the opening end of the inner hole of the corresponding vibration reduction ring through threaded connection, and the first threaded pressing block is pressed on the outer end face of the first flange through at least one vibration reduction ring.
5. The ultrasonic knife handle according to claim 4, wherein a second step is arranged on the inner wall of the vibration reduction ring, a second flange is arranged on the outer wall of the vibration reduction ring, the second step is clamped against the inner end face of the first flange or the inner end face of the second flange of the vibration reduction ring adjacent to the inner layer, and the second threaded pressing block is pressed on the outer end face of the first flange or the outer end face of the second flange of the vibration reduction ring adjacent to the inner layer.
6. An ultrasonic knife handle according to claim 5 wherein the tapered fixing block has a first step in its inner bore, the first step being clamped against an inner end surface of the first flange or an inner end surface of the second flange of the damping ring adjacent the inner layer.
7. The ultrasonic knife handle of claim 1, wherein the pressing block is provided with an air inlet hole, and the sleeve is provided with an air outlet hole, so that an air cooling system of the ultrasonic transducer is formed through the air inlet hole and the air outlet hole.
8. The ultrasonic knife handle of claim 7, wherein the ultrasonic transducer further comprises a sealing ring, a groove is formed in the outer wall of the pressing block, and the sealing ring is arranged in the groove so that the contact position of the outer wall of the pressing block and the inner cavity of the sleeve is in sealing contact.
9. The ultrasonic knife handle according to any one of claims 1 to 8, characterized in that the shape and the size of the bottom of the inner cavity of the sleeve at the position where the bottom of the inner cavity is contacted with the piezoelectric ceramic plate are the same as the shape and the size of the piezoelectric ceramic plate.
10. An ultrasonic knife handle according to any one of claims 1 to 8 characterized in that the shape and size of the position where the pressing block contacts the piezoceramic sheet is the same as the shape and size of the piezoceramic sheet.
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| CN202110925427.2A CN113617622B (en) | 2021-08-12 | 2021-08-12 | Ultrasonic knife handle based on solid piezoelectric ceramic piece |
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