CN103174725A - Nut allowing unlocking in sandwich type free beam bending vibration working pattern - Google Patents
Nut allowing unlocking in sandwich type free beam bending vibration working pattern Download PDFInfo
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- CN103174725A CN103174725A CN2013100780494A CN201310078049A CN103174725A CN 103174725 A CN103174725 A CN 103174725A CN 2013100780494 A CN2013100780494 A CN 2013100780494A CN 201310078049 A CN201310078049 A CN 201310078049A CN 103174725 A CN103174725 A CN 103174725A
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Abstract
The invention provides a nut allowing unlocking in a sandwich type free beam bending vibration working pattern, and belongs to the field of fasteners and transmission parts by utilizing connection of a thread pair. The nut allowing unlocking in the sandwich type free beam bending vibration working pattern aims at conveniently, quickly and flexibly achieving conversion and control of two working states of self-locking and unlocking between the thread pair. A circle of circular grooves is formed in the middle of an outer circle surface of a nut body in a free beam state, piezoelectric flexible circular rings are composed of a plurality of piezoelectric flexible pieces, the piezoelectric flexible circular rings are embedded in the circular grooves of the nut body in the free beam state, the end faces of the piezoelectric flexible circular rings on the two sides are respectively connected with the end faces inside the circular grooves on the two sides, and a driving method of the piezoelectric flexible circular rings is a traveling wave shock excitation working pattern or a standing wave shock excitation working pattern. When driving signals are input in the piezoelectric flexible pieces, the nut allowing unlocking in the sandwich type free beam bending vibration working pattern ensures that the self-locking working state is converted into the unlocking working state, and therefore friction coefficient between the thread pair is greatly reduced, and the self-locking working state between the nut body and a screw vanishes.
Description
Technical field
The invention belongs to fastening piece that screw pair connects and the driving component field of utilizing.
Background technique
Use very extensive in equipment, system, device and mechanism in current every profession and trade based on the fastening piece of screw pair form and driving component.For the screw pair auxiliary connection, mainly there are two kinds of working staties, be respectively screw thread self-locking state and non-self-locking state, wherein the latter also can be described as released state.Self-locking working state for screw pair, the screw pair that adopts generally should satisfy the screw thread self-locking condition, be lead angle less than the equivalent friction angle between screw pair, main application is fastening, the drive rail of sliding of component and carries out the aspects such as jack that power is transmitted; Release working state for screw pair, namely satisfy lead angle greater than the equivalent friction angle between screw pair, mainly the motion that screws delivery system and the power output that utilizes between nut and screw rod, be embodied in following three aspects, the one, realize rotatablely moving and straight line motion between conversion, the 2nd, for the mutual alignment between each component of adjust system, the 3rd, obtain larger thrust output etc. with less input torque.At present, conversion and control for self-locking between screw pair and two kinds of working staties of release, often need to adopt simultaneously self-locking nut and corresponding release mechanism joint work with auto-lock function to realize, this class realizes that by additional unlocking structure mode the self-locking of screw pair and the mechanism of released state conversion function exist the problems such as complex structure, complex operation, fabricating cost height, the application of having limited screw pair fastening piece and driving component.
Summary of the invention
For easily and fast, realize neatly conversion and the control of self-locking and two kinds of working staties of release between screw pair, the present invention proposes a kind of split nut separated of sandwich free beam flexure vibrations mode of operation.
The split nut separated of described sandwich free beam flexure vibrations mode of operation is comprised of the basal body of nut of free beam state, the flexible annulus of piezoelectricity;
Be provided with internal thread on the inner headed face of the basal body of nut of free beam state, screw rod has been rotatably connected in the internal thread of the basal body of nut of free beam state, the lead angle of internal thread is less than the equivalent friction angle between internal thread and screw rod connecting thread pair, have all annular grooves in the middle part of the basal body of nut periphery of free beam state, be provided with a plurality of mounting holes for fixing on the basal body of nut outer surface of free beam state, the particular location of each mounting hole is respectively in the annular groove both sides; The flexible annulus of piezoelectricity is comprised of multi-disc piezoelectricity stretchable sheet; All piezoelectricity stretchable sheets are annulus pad shape, be provided with two fan-shaped polarized areas and two fan-shaped insulation isolated areas on the circumferencial direction of piezoelectricity stretchable sheet, two fan-shaped polarized areas and two fan-shaped insulation isolated areas are distinguished the space contiguous circumferential and are arranged, the flexible direction of two fan-shaped polarized areas of piezoelectricity stretchable sheet is identical with the thickness direction of piezoelectricity stretchable sheet, the connection that superposes successively of multi-disc piezoelectricity stretchable sheet; Driving phase difference 180 degree of the adjacent fan-shaped polarized area on each piezoelectricity stretchable sheet; The flexible annulus of piezoelectricity is embedded in the annular groove of basal body of nut of free beam state, and the both sides end face of the flexible annulus of piezoelectricity is connected with both sides end face in annular groove respectively; The driving mode of the flexible annulus of described piezoelectricity is row wave excitation mode of operation or standing wave exciting mode of operation; Row wave excitation mode of operation is that the multi-disc piezoelectricity stretchable sheet in the flexible annulus of described piezoelectricity is two and becomes one group, and fan-shaped polarized area and the fan-shaped polarized area of two piezoelectricity stretchable sheets faces in every group, and their driving phase place is identical; Fan-shaped polarized area between adjacent group and fan-shaped insulation isolated area face; Driving phase difference 90 degree of adjacent group; Standing wave exciting mode of operation is one group and drives separately, and fan-shaped polarized area and the fan-shaped polarized area of two piezoelectricity stretchable sheets faces in every group, and their driving phase place is identical.
The present invention can make the self-locking working state of basal body of nut change into the release working state when piezoelectricity stretchable sheet input drive signal, and namely the friction factor between screw pair significantly reduces, and the self-locking working state between basal body of nut and screw rod is disappeared.That the present invention also has advantages of is simple in structure, fabricating cost is low, applied range, can be used for the aspects such as break-make, location and speed control in machine driven system, has expanded the application of screw pair fastening piece and driving component.
Description of drawings
Fig. 1 is the structural representation after screw rod 1-1 of being rotatably connected in the split nut separated of sandwich free beam flexure vibrations mode of operation of the present invention;
Fig. 2 is the structural representation after in Fig. 1, the flexible annulus 2 of piezoelectricity launches to decompose;
Fig. 3 is piezoelectricity stretchable sheet 2-1 structural representation in Fig. 2.
Embodiment
Embodiment one:Describe referring to Fig. 1, Fig. 2, Fig. 3, this embodiment is comprised of the flexible annulus 2 of basal body of nut 1, piezoelectricity of free beam state;
Be provided with internal thread 1-2 on the inner headed face of the basal body of nut 1 of free beam state, screw rod 1-1 has been rotatably connected in the internal thread 1-2 of the basal body of nut 1 of free beam state, the lead angle of internal thread 1-2 is less than the equivalent friction angle between internal thread 1-2 and screw rod 1-1 connecting thread pair, have all annular groove 1-4 in the middle part of basal body of nut 1 periphery of free beam state, be provided with a plurality of mounting hole 1-3 for fixing on basal body of nut 1 outer surface of free beam state, the particular location of each mounting hole 1-3 is respectively in annular groove 1-4 both sides; The flexible annulus 2 of piezoelectricity is comprised of multi-disc piezoelectricity stretchable sheet 2-1; All piezoelectricity stretchable sheet 2-1 are annulus pad shape, be provided with two fan-shaped polarized area 2-2 and two fan-shaped insulation isolated area 2-3 on the circumferencial direction of piezoelectricity stretchable sheet 2-1, two fan-shaped polarized area 2-2 and two fan-shaped insulation isolated area 2-3 distinguish the space contiguous circumferential and arrange, the flexible direction of two fan-shaped polarized area 2-2 of piezoelectricity stretchable sheet 2 is identical with the thickness direction of piezoelectricity stretchable sheet 2, the multi-disc piezoelectricity stretchable sheet 2-1 connection that superposes successively; Driving phase difference 180 degree of adjacent fan-shaped polarized area 2-2 on each piezoelectricity stretchable sheet 2-1; The flexible annulus 2 of piezoelectricity is embedded in the annular groove 1-4 of basal body of nut 1 of free beam state, and the both sides end face of the flexible annulus 2 of piezoelectricity is connected with both sides end face in annular groove 1-4 respectively; The driving mode of the flexible annulus 2 of described piezoelectricity is row wave excitation mode of operation or standing wave exciting mode of operation; Row wave excitation mode of operation is that the multi-disc piezoelectricity stretchable sheet 2-1 in the flexible annulus 2 of described piezoelectricity is two and becomes one group, and fan-shaped polarized area 2-2 and the fan-shaped polarized area 2-2 of two piezoelectricity stretchable sheet 2-1 faces in every group, and their driving phase place is identical; Fan-shaped polarized area 2-2 between adjacent group and fan-shaped insulation isolated area 2-3 face; Driving phase difference 90 degree of adjacent group; Standing wave exciting mode of operation is one group and drives separately, and fan-shaped polarized area 2-2 and the fan-shaped polarized area 2-2 of two piezoelectricity stretchable sheet 2-1 faces in every group, and their driving phase place is identical.
Embodiment two:Describe referring to Fig. 1, Fig. 2, Fig. 3, the difference of present embodiment and embodiment one is that the resonant frequency of the basal body of nut 1 of the driver frequency of described piezoelectricity stretchable sheet 2-1 and free beam state matches or is close, excites the basal body of nut 1 of free beam state to be in the ultrasonic vibration state with this; The driving electric signal waveform of piezoelectricity stretchable sheet 2-1 can be sinusoidal waveform ac signal, square waveform ac signal, triangular waveform ac signal or zigzag fashion ac signal.Other composition and annexation are identical with embodiment one.
Embodiment three:Describe referring to Fig. 1, Fig. 2, Fig. 3, the difference of present embodiment and embodiment one is that the internal thread 1-2 of basal body of nut 1 of described free beam state and the outside thread of screw rod 1-1 can be trapezoidal thread, V thread screw, square threaded form, buttress thread form, pipe thread or nonstandard screw thread.Other composition and annexation are identical with embodiment one.
Working principle: the split nut separated of sandwich free beam flexure vibrations mode of operation is mainly can separate by piezoelectricity stretchable sheet 2-1 excitation the micro breadth oscillation state that split nut is in high frequency (frequency is generally greater than 1000 Hz), utilize the antifriction effect that dither produces to reduce the friction factor that to separate between split nut and screw rod, destroy the condition of self-locking between screw pair, make and to separate split nut and be in the release working state.A kind of in the antifriction effect that the ultrasonic antifriction effect that is caused by the micro breadth oscillation of (frequency is generally greater than 13 kHz) in ultrasonic frequency is dither, mainly refer to when two kinematic pair are in Frotteurism, make wherein one or two contact surface be in the ultrasonic vibration state by applying of ultrasonic vibration and cause the phenomenon that between surface of contact, friction factor reduces, this phenomenon is confirmed by a large amount of experimental researcies at present, and this principle of antifriction effect that the present invention mainly utilizes dither to produce is carried out work.Mode by vibration coupling produces the motion for line ripple in the screw pair surface stack that can separate between split nut and screw rod simultaneously, this motion for line ripple may further be can separate split nut and screw rod provides relative movement or movement tendency, therefore can better realize separating the self-locking of split nut and conversion and the control of two kinds of working staties of release.
The split nut separated of sandwich free beam flexure vibrations mode of operation mainly utilizes the first rank flexural vibration mode along axial direction that can separate split nut to carry out work.In the time of can separating split nut and be in the first rank flexural vibration mode, it shows as along axial direction is the flexure vibrations distortion on the first rank.The replaceable one-tenth magnetostriction of described piezoelectricity stretchable sheet 2-1 sheet, photo-induced telescopic sheet or thermic stretchable sheet.
Claims (3)
1. the split nut separated of sandwich free beam flexure vibrations mode of operation, is characterized in that it is comprised of the flexible annulus (2) of basal body of nut (1), piezoelectricity of free beam state;
be provided with internal thread (1-2) on the inner headed face of the basal body of nut of free beam state (1), screw rod (1-1) has been rotatably connected in the internal thread (1-2) of the basal body of nut of free beam state (1), the lead angle of internal thread (1-2) is less than the equivalent friction angle between internal thread (1-2) and screw rod (1-1) connecting thread pair, the basal body of nut of free beam state (1) periphery has all annular grooves (1-4) on the middle part, be provided with a plurality of for fixing mounting hole (1-3) on the basal body of nut of free beam state (1) outer surface, the particular location of each mounting hole (1-3) is respectively in annular groove (1-4) both sides, the piezoelectricity annulus (2) that stretches is comprised of multi-disc piezoelectricity stretchable sheet (2-1), all piezoelectricity stretchable sheets (2-1) are annulus pad shape, be provided with two fan-shaped polarized areas (2-2) and two fan-shaped insulation isolated areas (2-3) on the circumferencial direction of piezoelectricity stretchable sheet (2-1), two fan-shaped polarized areas (2-2) and two fan-shaped insulation isolated areas (2-3) space contiguous circumferential are respectively arranged, the flexible direction of two fan-shaped polarized areas (2-2) of piezoelectricity stretchable sheet (2) is identical with the thickness direction of piezoelectricity stretchable sheet (2), multi-disc piezoelectricity stretchable sheet (2-1) connection that superposes successively, driving phase difference 180 degree of the adjacent fan-shaped polarized area (2-2) on each piezoelectricity stretchable sheet (2-1), the piezoelectricity annulus (2) that stretches is embedded in the annular groove (1-4) of basal body of nut (1) of free beam state, and the stretch both sides end face of annulus (2) of piezoelectricity is connected with both sides end face in annular groove (1-4) respectively, the stretch driving mode of annulus (2) of described piezoelectricity is row wave excitation mode of operation or standing wave exciting mode of operation, row wave excitation mode of operation is that the multi-disc piezoelectricity stretchable sheet (2-1) in the flexible annulus (2) of described piezoelectricity is one group of two one-tenth, in every group, the fan-shaped polarized area (2-2) of two piezoelectricity stretchable sheets (2-1) faces with fan-shaped polarized area (2-2), and their driving phase place is identical, fan-shaped polarized area (2-2) between adjacent group faces with fan-shaped insulation isolated area (2-3), driving phase difference 90 degree of adjacent group, standing wave exciting mode of operation is one group and drives separately, and the fan-shaped polarized area (2-2) of two piezoelectricity stretchable sheets (2-1) faces with fan-shaped polarized area (2-2) in every group, and their driving phase place is identical.
2. the split nut separated of sandwich free beam flexure vibrations mode of operation according to claim 1, the resonant frequency that it is characterized in that the basal body of nut (1) of the driver frequency of described piezoelectricity stretchable sheet (2-1) and free beam state matches or is close, excites the basal body of nut (1) of free beam state to be in the ultrasonic vibration state with this; The driving electric signal waveform of piezoelectricity stretchable sheet (2-1) can be sinusoidal waveform ac signal, square waveform ac signal, triangular waveform ac signal or zigzag fashion ac signal.
3. the split nut separated of sandwich free beam flexure vibrations mode of operation according to claim 1 is characterized in that the internal thread (1-2) of basal body of nut (1) of described free beam state and the outside thread of screw rod (1-1) can be trapezoidal thread, V thread screw, square threaded form, buttress thread form, pipe thread or nonstandard screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310078049.4A CN103174725B (en) | 2013-03-12 | 2013-03-12 | Nut allowing unlocking in sandwich type free beam bending vibration working pattern |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310078049.4A CN103174725B (en) | 2013-03-12 | 2013-03-12 | Nut allowing unlocking in sandwich type free beam bending vibration working pattern |
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| CN103174725A true CN103174725A (en) | 2013-06-26 |
| CN103174725B CN103174725B (en) | 2015-03-18 |
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| CN201310078049.4A Expired - Fee Related CN103174725B (en) | 2013-03-12 | 2013-03-12 | Nut allowing unlocking in sandwich type free beam bending vibration working pattern |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281598A (en) * | 2015-01-06 | 2016-01-27 | 长春工业大学 | Sandwich-type mode transition ultrasonic motor, drive platform and drive method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04281374A (en) * | 1991-03-07 | 1992-10-06 | Sadayuki Ueha | Ultrasonic motor and control method for driving thereof |
| CN201518456U (en) * | 2009-09-14 | 2010-06-30 | 缪云灼 | Mini-size rod type thread ultrasonic motor |
| CN102185519A (en) * | 2011-05-11 | 2011-09-14 | 南京航空航天大学 | Mode conversion type piezoelectric thread transmission linear ultrasonic motor |
| CN102355157A (en) * | 2011-10-10 | 2012-02-15 | 哈尔滨工业大学 | Piezoelectric plate-sandwiched rotary linear ultrasonic motor stator |
-
2013
- 2013-03-12 CN CN201310078049.4A patent/CN103174725B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04281374A (en) * | 1991-03-07 | 1992-10-06 | Sadayuki Ueha | Ultrasonic motor and control method for driving thereof |
| CN201518456U (en) * | 2009-09-14 | 2010-06-30 | 缪云灼 | Mini-size rod type thread ultrasonic motor |
| CN102185519A (en) * | 2011-05-11 | 2011-09-14 | 南京航空航天大学 | Mode conversion type piezoelectric thread transmission linear ultrasonic motor |
| CN102355157A (en) * | 2011-10-10 | 2012-02-15 | 哈尔滨工业大学 | Piezoelectric plate-sandwiched rotary linear ultrasonic motor stator |
Non-Patent Citations (2)
| Title |
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| 周铁英等: "螺母型超声电机驱动的集成透镜调焦系统", 《中国科学E辑：技术科学》 * |
| 白东哲等: "超声波直线电机的研究", 《精密制造与自动化》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281598A (en) * | 2015-01-06 | 2016-01-27 | 长春工业大学 | Sandwich-type mode transition ultrasonic motor, drive platform and drive method thereof |
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| CN103174725B (en) | 2015-03-18 |
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Granted publication date: 20150318 Termination date: 20200312 |