CN103148082A - Unlockable nut in paster-type free beam composite bending-vibration working mode - Google Patents
Unlockable nut in paster-type free beam composite bending-vibration working mode Download PDFInfo
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- CN103148082A CN103148082A CN2013100780579A CN201310078057A CN103148082A CN 103148082 A CN103148082 A CN 103148082A CN 2013100780579 A CN2013100780579 A CN 2013100780579A CN 201310078057 A CN201310078057 A CN 201310078057A CN 103148082 A CN103148082 A CN 103148082A
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- stretchable sheet
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Abstract
The invention discloses an unlockable nut in a paster-type free beam composite bending-vibration working mode, and belongs to the field of fasteners and transmission members connected by screw thread pairs. The unlockable nut achieves switching and controlling of a self-locking working state and an unlocking working state of screw thread pairs conveniently, quickly and flexibly. A plurality of planes arranged in a pairwise opposite manner are arranged circumferentially on an external circumferential surface of a nut matrix in a free beam state of the unlockable nut; each plane is provided with a separate-excitation extension piece; extension directions of the separate-excitation extension pieces are parallel to an axis of the nut matrix in the free beam state; separate-excitation frequencies of the separate-excitation extension pieces are within an ultrasonic wave frequency range; and separate-excitation drive modes of the separate-excitation extension pieces are a travelling wave vibration excitation working mode or a standing wave vibration excitation working mode. According to the unlockable nut, the self-locking working state of the nut matrix can be changed to the unblocking working state when the separate-excitation extension pieces input separate-excitation drive signals, that is a friction coefficient between the screw thread pairs is reduced greatly, so that the self-locking working state between the nut matrix and a screw rod disappears.
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 SMD free beam composite bending vibration mode of operation.
The split nut separated of described SMD free beam composite bending vibration mode of operation is comprised of basal body of nut, the multi-disc independent-excited stretchable sheet of free beam state;
Be provided with internal thread on the inner headed face of the basal body of nut of free beam state, the screw rod that 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; On the periphery of the basal body of nut of free beam state, be provided with a plurality of planes facing each other around circumferencial direction, be provided with a slice independent-excited stretchable sheet on each plane, and a plane of every independent-excited stretchable sheet all is connected with the plane; The flexible direction of described independent-excited stretchable sheet is parallel with the axis of the basal body of nut 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 near the two ends of the flexible direction of each independent-excited stretchable sheet; Its sharp frequency of described independent-excited stretchable sheet is in supersonic band; Its sharp driving mode of multi-disc independent-excited stretchable sheet is row wave excitation mode of operation or standing wave exciting mode of operation; Described row wave excitation mode of operation is driving phase difference 180 degree of the independent-excited stretchable sheet on every two opposite planar, independent-excited stretchable sheet on every two opposite planar drives successively so that circumference is adjacent, driving phase difference 90 degree of the independent-excited stretchable sheet on the circumference adjacent plane; Described standing wave exciting mode of operation is that each or several independent-excited stretchable sheet can drive separately or in groups, and the driving phase difference of each or every group of independent-excited stretchable sheet can be 0 degree.
The present invention can it swash when driving signal in the input of independent-excited stretchable sheet, makes the self-locking working state of basal body of nut change into the release working state, 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 1-4 of being rotatably connected in the split nut separated of SMD free beam composite bending vibration mode of operation of the present invention;
Fig. 2 be in Fig. 1 A-A to the sectional structure schematic diagram.
Embodiment
Embodiment one:Describe referring to Fig. 1, Fig. 2, this embodiment is comprised of basal body of nut 1, the multi-disc independent-excited stretchable sheet 2 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, the screw rod 1-4 that 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 1-4 connecting thread pair; On the periphery of the basal body of nut 1 of free beam state, be provided with a plurality of plane 1-1 facing each other around circumferencial direction, be provided with a slice independent-excited stretchable sheet 2 on each plane 1-1, and a plane of every independent-excited stretchable sheet 2 all is connected with plane 1-1; The flexible direction of described independent-excited stretchable sheet 2 is parallel with the axis of the basal body of nut 1 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 near the two ends of each independent-excited stretchable sheet 2 flexible direction; Its sharp frequency of described independent-excited stretchable sheet 2 is in supersonic band; Its sharp driving mode of multi-disc independent-excited stretchable sheet 2 is row wave excitation mode of operation or standing wave exciting mode of operation; Described row wave excitation mode of operation is driving phase difference 180 degree of the independent-excited stretchable sheet 2 on every two opposite planar 1-1, independent-excited stretchable sheet 2 on every two opposite planar 1-1 drives successively so that circumference is adjacent, driving phase difference 90 degree of the independent-excited stretchable sheet 2 on circumference adjacent plane 1-1; Described standing wave exciting mode of operation is that each or several independent-excited stretchable sheet 2 can drive separately or in groups, and the driving phase difference of each or every group of independent-excited stretchable sheet 2 can be 0 degree.
Embodiment two:Describe referring to Fig. 1, Fig. 2, the difference of present embodiment and embodiment one is that described independent-excited stretchable sheet 2 is the piezoelectricity stretchable sheet, the resonant frequency of the basal body of nut 1 of its driver frequency 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 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, the difference of present embodiment and embodiment one is that described independent-excited stretchable sheet 2 is magnetostriction sheet, photo-induced telescopic sheet or thermic stretchable sheet.Other composition and annexation are identical with embodiment one.
Embodiment four:Describe referring to Fig. 1, Fig. 2, 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 1-4 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 SMD free beam composite bending vibration mode of operation is mainly can separate by the excitation of independent-excited stretchable sheet 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 SMD free beam composite bending vibration mode of operation mainly utilizes the m rank along axial direction (m is positive integer) that can separate split nut, along the circumferential direction CB(m, the n of n rank (n for greater than 1 positive integer)) the complex bend mode of vibration carries out work.Can separate split nut and be in CB(m, n) during the complex bend mode of vibration, it shows as and along the circumferential direction exists n to the axial bending vibration distortion for the m rank of meeting spatial orthogonality relation, there is the bus that contacts that the n bar parallels to the axis between the split nut separated that be in the release working state this moment and screw rod, improved and to have separated the bearing capacity of split nut and the stability of motion control.
Claims (4)
1. the split nut separated of SMD free beam composite bending vibration mode of operation, is characterized in that it is comprised of basal body of nut (1), the multi-disc independent-excited stretchable sheet (2) 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), the screw rod (1-4) that 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 (1-4) connecting thread pair; On the periphery of the basal body of nut of free beam state (1), be provided with a plurality of planes facing each other (1-1) around circumferencial direction, be provided with a slice independent-excited stretchable sheet (2) on each plane (1-1), and a plane of every independent-excited stretchable sheet (2) all is connected with plane (1-1); The flexible direction of described independent-excited stretchable sheet (2) is parallel with the axis of the basal body of nut (1) of free beam state; Be provided with a plurality of mounting holes (1-3) for fixing on the basal body of nut of free beam state (1) outer surface, the particular location of each mounting hole (1-3) is respectively near the two ends of the flexible direction of each independent-excited stretchable sheet (2); Its sharp frequency of described independent-excited stretchable sheet (2) is in supersonic band; Its sharp driving mode of multi-disc independent-excited stretchable sheet (2) is row wave excitation mode of operation or standing wave exciting mode of operation; Described row wave excitation mode of operation is driving phase difference 180 degree of the independent-excited stretchable sheet (2) on every two opposite planar (1-1), independent-excited stretchable sheet (2) on every two opposite planar (1-1) drives successively so that circumference is adjacent, driving phase difference 90 degree of the independent-excited stretchable sheet (2) on circumference adjacent plane (1-1); Described standing wave exciting mode of operation is that each or several independent-excited stretchable sheet (2) can drive separately or in groups, and the driving phase difference of each or every group of independent-excited stretchable sheet (2) can be 0 degree.
2. the split nut separated of SMD free beam composite bending vibration mode of operation according to claim 1, it is characterized in that described independent-excited stretchable sheet (2) is the piezoelectricity stretchable sheet, the resonant frequency of the basal body of nut of its driver frequency and free beam state (1) 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 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 SMD free beam composite bending vibration mode of operation according to claim 1, is characterized in that described independent-excited stretchable sheet (2) is magnetostriction sheet, photo-induced telescopic sheet or thermic stretchable sheet.
4. the split nut separated of SMD free beam composite bending vibration 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 (1-4) 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 |
|---|---|---|---|
| CN201310078057.9A CN103148082B (en) | 2013-03-12 | 2013-03-12 | Unlockable nut in paster-type free beam composite bending-vibration working mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310078057.9A CN103148082B (en) | 2013-03-12 | 2013-03-12 | Unlockable nut in paster-type free beam composite bending-vibration working mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103148082A true CN103148082A (en) | 2013-06-12 |
| CN103148082B CN103148082B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310078057.9A Expired - Fee Related CN103148082B (en) | 2013-03-12 | 2013-03-12 | Unlockable nut in paster-type free beam composite bending-vibration working mode |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1767347A (en) * | 2005-11-18 | 2006-05-03 | 清华大学 | Screw thread driven polyhedron ultrasonic motor |
| CN101300730A (en) * | 2005-10-28 | 2008-11-05 | 新阶科技股份有限公司 | Mechanism comprised of ultrasonic lead screw motor |
| CN201518456U (en) * | 2009-09-14 | 2010-06-30 | 缪云灼 | Mini-size rod type thread ultrasonic motor |
| DE102010022812A1 (en) * | 2010-06-05 | 2011-12-08 | Physik Instrumente (Pi) Gmbh & Co. Kg | Ultrasonic motor, has element to be driven and contact element, which are in threaded engagement, and ultrasound actuator surrounding contact element on outer circumferential surface completely |
-
2013
- 2013-03-12 CN CN201310078057.9A patent/CN103148082B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101300730A (en) * | 2005-10-28 | 2008-11-05 | 新阶科技股份有限公司 | Mechanism comprised of ultrasonic lead screw motor |
| CN1767347A (en) * | 2005-11-18 | 2006-05-03 | 清华大学 | Screw thread driven polyhedron ultrasonic motor |
| CN201518456U (en) * | 2009-09-14 | 2010-06-30 | 缪云灼 | Mini-size rod type thread ultrasonic motor |
| DE102010022812A1 (en) * | 2010-06-05 | 2011-12-08 | Physik Instrumente (Pi) Gmbh & Co. Kg | Ultrasonic motor, has element to be driven and contact element, which are in threaded engagement, and ultrasound actuator surrounding contact element on outer circumferential surface completely |
Non-Patent Citations (1)
| Title |
|---|
| 郭向东: "基于贴片式弯振模态超声电机驱动电气比例阀的研究", 《万方学位论文》 * |
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| CN103148082B (en) | 2015-02-18 |
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