WO2004084396A1 - 超音波浮上装置 - Google Patents
超音波浮上装置 Download PDFInfo
- Publication number
- WO2004084396A1 WO2004084396A1 PCT/JP2004/003465 JP2004003465W WO2004084396A1 WO 2004084396 A1 WO2004084396 A1 WO 2004084396A1 JP 2004003465 W JP2004003465 W JP 2004003465W WO 2004084396 A1 WO2004084396 A1 WO 2004084396A1
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- WO
- WIPO (PCT)
- Prior art keywords
- vibration
- ultrasonic levitation
- side guide
- fixed
- movable
- Prior art date
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- 238000005339 levitation Methods 0.000 claims description 76
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/08—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using travelling waves, i.e. Rayleigh surface waves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0607—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being retained in a gap, e.g. squeeze film bearings
- F16C32/0611—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being retained in a gap, e.g. squeeze film bearings by means of vibrations
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
Definitions
- the present invention relates to an ultrasonic levitation apparatus, and more particularly, to an ultrasonic levitation apparatus designed to improve the structure of a guide mechanism so that the apparatus can be made compact and levitation stability can be achieved.
- An ultrasonic levitation device using ultrasonic vibration is considered to be suitable for a clean room environment and precision positioning applications because it is non-contact and does not cause environmental pollution due to wear and lubricant.
- an ultrasonic levitation device for example, there is one disclosed in Patent Document 1 or Patent Document 2 Patent Document 1 Japanese Patent Application Laid-Open No. 7-196127
- the height of the device increases the center of gravity of the slider, which causes a problem that operation stability is impaired.
- the present invention has been made based on such a point, and the object thereof is to provide a linear motion guide function without requiring a particularly complicated structure, and to provide a floating stability without increasing the size of the device. Another object of the present invention is to provide an ultrasonic levitation device capable of improving the levitation rigidity.
- the ultrasonic levitation device according to claim 1 of the present invention is
- the whole or a part of the fixed part side guide provided in the fixed part is convex or concave in the direction along the floating direction.
- all or a part of the movable portion side guide portion provided in the movable portion is formed in a concave or convex shape in a direction along the floating direction, and faces the fixed portion side guide portion. ⁇ It is characterized by being arranged.
- the ultrasonic levitation device according to claim 2 is the ultrasonic levitation device according to claim 1, wherein all or a part of the fixed portion side guide portion provided in the fixed portion is arranged in a direction along the floating direction.
- the whole or a part of the guide on the movable part side provided in the movable part is formed in the shape of an inverted chevron or convex convex in the direction along the floating direction. And is arranged so as to face and be fixed to the fixed portion side guide portion.
- the ultrasonic levitation device is the ultrasonic levitation device according to claim 1, wherein the whole or a part of the fixed part side guide provided in the fixed part is provided. Is formed in the shape of a U-shaped convex or the inverted U-shaped concave in the direction along the floating direction, while the whole or a part of the movable part side guide provided in the movable part is a direction along the floating direction.
- the groove is formed in an inverted U-shape concave shape or a U-shape convex shape so as to face and dispose the fixed portion side guide portion.
- the ultrasonic levitation device according to claim 4 is the ultrasonic levitation device according to any one of claims 1 to 3, wherein the guide includes the fixed portion side guide portion and the movable portion side guide portion. It has two or more parts.
- An ultrasonic levitation device is the ultrasonic levitation device according to any one of claims 1 to 4, wherein two or more vibration generators are provided. It is.
- An ultrasonic levitation device is the ultrasonic levitation device according to any one of claims 1 to 5, wherein a vibration conversion member is used for the vibration generator. It is.
- the ultrasonic levitation device according to claim 7 is the ultrasonic levitation device according to claim 6, wherein the fixed-portion-side guide or the movable-portion-side guide and the vibration conversion member are integrated. It is characterized by the following.
- An ultrasonic levitation apparatus is the ultrasonic levitation apparatus according to claim 7, wherein the vibration conversion member has a rectangular shape.
- An ultrasonic levitation device is the ultrasonic levitation device according to claim 8, wherein the vibration generation source of the vibration generation device is disposed in the square-shaped vibration conversion member. It is assumed that.
- the ultrasonic levitation device according to claim 10 is the ultrasonic levitation device according to any one of claims 1 to 9, wherein The present invention is characterized in that a Juban type vibrator, a laminated piezoelectric element or a single-plate piezoelectric element is used.
- the ultrasonic levitation device according to claim 11 is the ultrasonic levitation device according to any one of claims 5 to 10, wherein a vibration phase difference between the two or more vibration generating devices is provided. Is provided.
- An ultrasonic levitation apparatus is the ultrasonic levitation apparatus according to claim 11, wherein the vibration phase difference is approximately 90. Alternatively, the angle is approximately 270 °.
- the ultrasonic levitation device is configured such that all or a part of the fixed portion side guide portion provided in the fixed portion is formed in a convex shape or a circular shape in the direction along the floating direction. All or part of the movable part side guide part provided in the part is formed in a concave or convex shape in the direction along the floating direction, and it is arranged to face and dispose the above fixed part side guide part. Yes, so that it can function effectively as a guide.
- all or a part of the fixed part side guide part provided in the fixed part is formed in a convex shape or an inverted concave shape in the direction along the floating direction, while the movable part is formed in the movable part.
- a configuration in which all or a part of the provided movable portion side guide portion is formed in an inverted mountain-shaped concave shape or a mountain-shaped convex shape in a direction along the floating direction and opposed to and disposed on the fixed portion side guide portion, All or a part of the fixed portion side guide portion provided in the fixed portion is formed in a C-shaped convex shape or an inverted C-shaped concave shape in a direction along a floating direction, and provided in the movable portion.
- all or part of the guide on the movable part side is formed in an inverted U-shape concave or convex shape in the direction along the floating direction, and opposed to and arranged on the guide part on the fixed part side.
- a guide section consisting of the fixed section side guide section and the movable section side guide section It is conceivable to provide two or more locations, whereby the height of the device can be reduced and rolling can be prevented.
- the height can be reduced.
- the vibration converting member has a square shape, and furthermore, it is conceivable that the vibration generating source of the vibration generating device is arranged in the square-shaped vibration converting member. Therefore, the device can be made compact.
- the vibration source of the vibration generator for example, a vibration source using a Langevin type vibrator, a laminated piezoelectric element, or a single-plate piezoelectric element can be considered.
- a vibration phase difference is given between two or more vibration generators, standing waves can be suppressed, and it becomes possible to effectively cope with precise positioning.
- the phase difference is set to approximately 90 ° or approximately 270 °, generation of thrust can be expected.
- FIG. 1 is a diagram showing a first embodiment of the present invention, wherein FIG. 1 (a) is a plan view showing the configuration of an ultrasonic levitation device, and FIG. 1 (b) is FIG. 1 (a) FIG. 1 (c) is a cross-sectional view taken along line c-c of FIG. 1 (a).
- FIG. 2 is a view showing a first embodiment of the present invention
- FIG. Fig. 2 (b) is a cross-sectional view showing the schematic configuration of an ultrasonic levitation device with one guide
- Fig. 2 (b) is a cross-sectional view showing the schematic configuration of an ultrasonic levitation device with two guides
- FIG. 2 (c) is a cross-sectional view showing a schematic configuration of the ultrasonic levitation apparatus when four guide parts are provided.
- FIG. 3 is a diagram showing a comparative example used for explaining the first embodiment of the present invention.
- FIG. 3 (a) shows a type in which one vibration generator is used and a vibration direction conversion member is not used.
- FIG. 3 (b) is a side view showing a configuration of an ultrasonic levitation device of a type having two vibration generators and not using a vibration direction conversion member.
- FIG. 4 is a diagram showing a first embodiment of the present invention.
- FIG. 4 (a) is a waveform diagram for explaining a vibration amplitude and a traveling wave, and FIG. Waveform diagram for explaining the vibration amplitude when a phase difference is applied to two vibration generators.
- Fig. 4 (c) illustrates the vibration amplitude when a phase difference is not applied to the two vibration generators.
- FIG. 5 is a diagram showing the first embodiment of the present invention, and is a characteristic diagram showing a relationship between a traveling wave ratio and a phase difference.
- FIG. 6 is a view showing a second embodiment of the present invention, wherein FIG. 6 (a) is a plan view showing the configuration of an ultrasonic levitation apparatus, and FIG. 6 (b) is FIG. 6 (a) Fig. 6 (c) is a cross-sectional view taken along line c-c of Fig. 6 (a).
- FIG. 7 is a view showing a third embodiment of the present invention.
- FIG. 7 (a) is a plan view showing a configuration of an ultrasonic levitation device
- FIG. 7 (b) is a view shown in FIG. 7 (a).
- Fig. 7 (c) is a cross-sectional view taken along line c-c of Fig. 7 (a).
- FIG. 8 is a view showing a fourth embodiment of the present invention.
- FIG. 8 (a) is a plan view showing the configuration of an ultrasonic levitation apparatus
- FIG. 8 (b) is FIG. 8 (a)
- Fig. 8 (c) is a cross-sectional view taken along line c-c of Fig. 8 (a).
- FIG. 9 is a diagram showing a fifth embodiment of the present invention, and FIG. 9 (b) is a view taken in the direction of arrows b—b in FIG. 9 (a), and FIG. 9 (c) is a cross-sectional view taken along line c-c in FIG. 9 (a). It is. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram conceptually showing the configuration of an ultrasonic levitation apparatus according to the present embodiment.
- FIG. 1 (a) is a plan view of the ultrasonic levitation apparatus
- FIG. 1 (b) is FIG. Fig. 1 (a) is a view taken along the line bb
- Fig. 1 (c) is a cross-sectional view taken along the line c-c in Fig. 1 (a).
- vibration generating devices 3 and 5 are attached to the bottom surface side of the fixing portion 1 and both left and right ends in the longitudinal direction.
- Holding members 7 and 9 are attached to the vibration generators 3 and 5, and the fixed portion 1 is installed on the base 11 via the holding members 7 and 9.
- the vibration generating device 3 includes a Langevin type ultrasonic vibrator 13 and an L-shaped vibration direction converting member 15.
- the vibration generating device 5 also includes a Langevin type ultrasonic vibrator 17 and an L-shaped vibration direction changing member 19.
- the Langevin type ultrasonic transducers 13 and 17 are installed in a state of being directed horizontally, thereby reducing the height of the apparatus.
- the direction of the ultrasonic vibration by the Langevin type ultrasonic transducers 13 and 17 is horizontal, but this is converted to the vertical direction by the L-shaped vibration direction converting members 15 and 19. Things.
- a movable part 21 is provided on the fixed part 1 so as to be able to float.
- fixed part side guides 23 and 25 are provided at two places on the left and right sides in the short direction on the fixed part 1 side.
- the fixed part side guide part 23 has a chevron shape, and It is formed in a convex shape. That is, the two inclined surfaces 23a and 23b form a mountain shape.
- the fixed portion side guide portion 23 is formed so as to extend in the longitudinal direction.
- the fixed portion side guide portion 25 has a similar configuration, and has a mountain shape by two inclined surfaces 25a and 25b.
- a flat surface 27 is provided between the fixed portion side guide portion 23 and the fixed portion side guide portion 25.
- the movable portion side guide portions 29, 29 correspond to the fixed portion side guide portions 23, 25, respectively. 3 1 is provided.
- the movable-portion-side guide portion 29 has an inverted chevron shape, and is formed in a concave shape facing upward in the drawing. That is, the two inclined surfaces 29a and 29b form an inverted mountain shape.
- the movable section-side guide section 31 has the same configuration, and has an inverted mountain shape formed by two inclined surfaces 31a and 31b. Further, an M part 33 is formed between the movable part side guide part 29 and the movable part side guide part 31.
- a driving voice coil motor 35 is provided between the fixed part 1 and the movable part 21. That is, as shown in FIG. 1 (c), the coil 37 is provided on the flat surface 27 on the fixed part 1 side, while the permanent magnet 39 is provided on the concave part 33 on the movable part 21 side. Is installed. These coils 37 and permanent magnets 39 constitute a voice coil motor 35 for driving. Then, by passing a current in an appropriate direction through the coil 37, the movable part 21 is caused to interact with the flow of the magnetic flux of the permanent magnet 39 based on the so-called "Fleming's left-hand rule". On the other hand, a driving force is generated for moving in any of the ⁇ directions.
- FIG. 2 (a) shows one fixed section side guide section 23 and one movable section side guide section 29 opposed to each other.
- the fixed portion 1 vibrates ultrasonically, and the inclined surfaces 23 a, 23 b of the fixed portion side guide portion 23 and the inclined surfaces 29 a, 23 b of the movable portion side guide portion 29 are formed.
- the pressure in the air layer between 9b and 9b rises, so that the movable part 21 floats.
- the flying height that is, the position of the movable part 21 in the Z direction (the vertical direction in FIG. 2) is determined by the pressure of the air layer and the weight of the movable part 21.
- the fixed part side guide part 23 and the movable part side guide part 29 are formed by inclined surfaces, when the movable part 21 moves in the Y direction (perpendicular to the paper), the X direction The position (in the horizontal direction of the drawing) hardly changes, and thus functions as a so-called “linear guide”.
- two guide portions are provided.
- the slope height can be reduced to 1 to 2 when the same floating slope area is used, thereby reducing the height of the device. It is. It is also possible to improve so-called “rolling (rotational rigidity in the paper plane in the figure)". In other words, when there is only one guide as shown in Fig. 2 (a), the above-mentioned rolling is a concern, but when two guides are provided as shown in Fig. 2 (b).
- the fixed portion 1 side is a convex portion
- the movable portion 21 side is a concave portion
- Fig. 3 (a) if the moving distance (stroke) of the movable part 21 is short, a single vibration generator 3 may be used, but if a longer stroke is desired, The rigidity of the fixed part 1 must be increased so that the fixed part 1 does not bend.
- the configuration of the vibration generators 3 ′, 5 shown in FIG. 3 is different from that of the vibration generators 3, 5 in the present embodiment. That is, the Langevin type ultrasonic transducers 13 and 17 used therein are extended in the Z direction and arranged, and are arranged so as to vibrate in the Z direction. This is done for the sake of the following explanation.
- the vibration generators 3 and 5 in the present embodiment In addition, the vibration direction changing members 15 and 19 are used, so that the height is also reduced. This will be explained with reference to FIG.
- the Langevin type vibrators 13, 17 ′ used therein are, as described above, in the vertical direction in the figure, that is, in the Z direction. It is installed in such a way as to vibrate in a different way. Therefore, the device becomes taller.
- the Langepan-type vibrators 13 and 17 of the vibration generators 3 and 5 are arranged so as to vibrate in the horizontal direction, and the L-shaped vibration The direction changing members 15 and 19 are configured to change the direction in the vertical direction. And we go-between, in which low-profile have been reduced 0
- a phase difference is provided between the two vibration generators 3 and 5.
- the waveform is as shown in FIG. 4 (c), which is a so-called “constant i3 ⁇ 4 wave”.
- This standing wave has a large amplitude because it is in a resonance state, which is advantageous for obtaining a large levitation force.
- the amplitude differs depending on the position of the fixed part 1 in the Y direction, the movement of the movable part 21 As a result, the levitation force will be different. Therefore, it is not suitable as an ultra-precise positioning guide.
- a phase difference is provided between the two vibration generating devices 3 and 5.
- the waveform becomes as shown in Fig. 4 (b)
- no standing wave is formed as shown in Fig. 4 (c)
- the amplitude of the vibration amplitude depends on the position of the fixed part 1 in the Y direction.
- the variation in the height is small, and the variation in the levitation force due to the position in the Y direction is also small, which is a very advantageous configuration for precise positioning.
- FIG. 5 is a characteristic diagram showing a change in the traveling wave ratio with a change in the phase difference, with the horizontal axis representing the phase difference and the vertical axis representing the traveling wave ratio.
- Fig. 5 in the vicinity of the phase differences “0 °” and “180 ° J”, almost all are standing waves, and the traveling wave only emits about 1 to 40.
- the traveling wave ratio In the vicinity of the phase difference “90.” and near “270 °”, the traveling wave ratio is near “1”, and the ratio of the traveling wave is high. Therefore, a stable traveling wave can be generated by setting the phase difference to around “90.” or “270 ° J.”
- the movable part 21 can be moved by applying a thrust to the movable part 21 through an air layer between the fixed part 1 and the movable part 21. At this time, the vibration amplitude in the Y direction can be reduced. This is shown in Fig. 4 (a).
- the movable part 21 can be driven by setting the phase difference between the vibration generators 3 and 5 to “approximately 90 °” or “approximately 270 °” without separately providing a driving device. become. Also, when the movable part 21 moves to the right in the Y direction at a phase difference of 90 °, when the phase difference is changed to 270 °, the movable part 21 moves to the left. Thus, the control of the moving direction is also possible.
- the phase difference to be set is applied to the vibration generators at both ends, and the other vibration generators are positioned at both ends according to the distance from the vibration generators at both ends. Proportional distribution of the phase difference may be performed. For example, when three vibration generators are used and a phase difference of 90 ° is given to both ends, the vibration generator placed in the middle is half of the phase difference of 90 ° between both ends and 45 °. What is necessary is just to give a phase difference.
- the fixing portion 1 is provided with the fixing portion-side guide portions 23 and 25 in a convex shape
- the movable portion 21 is provided with the movable portion-side guide portions 29 and 31 in a concave shape. Because the arrangement is arranged, an ultrasonic levitation device that can function effectively as a linear guide can be obtained.
- the height can be reduced accordingly.
- the height and compactness of the device can be reduced, and rolling can be prevented.
- the rigidity of the fixed part 1 can be improved without increasing the height, and the output per vibration generator can be reduced. Can be.
- the height of the apparatus can be reduced.
- FIG. 7 is a diagram conceptually showing the configuration of an ultrasonic levitation apparatus according to the third embodiment.
- FIG. 7 (a) is a plan view of the ultrasonic levitation apparatus
- FIG. FIG. 7 (a) is a view taken in the direction of arrows b-b
- FIG. 7 (c) is a cross-sectional view taken along the line c-c in FIG. 7 (a).
- the fixed portion 101 is provided on both sides of the vibration converting members 121 and 125 and the vibration converting members 121 and 125. It is configured to include the fixed part side guides 105 and 107. At the left and right ends in the longitudinal direction between the fixed part side guides 105 and 107, vibration generators 109 and 111 are provided with the vibration conversion member 1 of the fixed part 101. It is installed with 2 1 and 1 2 5 attached. Holding members 113, 115 are attached to the vibration generators 109, 111, respectively.
- the fixed portion 101 is installed on the base 117 via the holding members 113, 115 of the vibration generators 109, 111.
- the vibration conversion members 1 2 1 and 1 2 5 are components of the fixed portion 101 and also components of the vibration generators 109 and 111 as described above. .
- the vibration generator 109 includes a Langevin type ultrasonic vibrator 1 19 and a cross-shaped vibration direction converting member 1 21.
- the vibration generator 111 is also composed of a Langevin type ultrasonic vibrator 123 and a cross-shaped vibration direction conversion member 125.
- the ultrasonic vibration generated by the Langevin type ultrasonic vibrator 1 1 9 and 1 2 3 is converted into two orthogonal directions by the cross-shaped vibration direction conversion members 1 2 1 and 1 2 5, and the fixed section side guide 1 Ultrasonic vibration is applied to 05 and 107.
- a movable part 131 is installed so as to float.
- inclined surfaces 105a and 107a are formed on the fixed portion side guide portions 105 and 107 side. When viewed from the cross-sectional direction, as shown in FIG. 7 (c), it is formed in a “C” shape.
- the inclined surfaces 13a and 13b are formed so as to face the inclined surfaces 105a and 107a.
- the concave-convex structure of the movable portion 131 and the fixed-portion-side guide portions 105 and 107 is formed into a “C” shape for the following reason.
- the concavo-convex structure between the fixed part 1 side and the movable part 21 side has a mountain shape. At that time, high accuracy is required for the mutual dimensions at the top of the chevron. That is, the fixed part 1 and the movable part 21 may come into contact with each other due to a slight dimensional error.
- the concavo-convex structure between the movable portion 13 1 and the fixed portion side guide portions 105 and 107 is formed in a “C” shape.
- the surface accuracy of the inclined planes 105 a, 107 a, 131 a, and 13 lb is required only, thereby facilitating machining, reducing machining costs, and increasing resistance to disturbances such as dimensional changes due to thermal expansion.
- a concave portion 133 is formed on the movable portion 131 side.
- the coil base 103 is provided on the base 117.
- a coil 139 is provided on this coil base 103.
- the coil 13 9 and the permanent magnet 14 1 installed in the concave portion 13 33 constitute a voice coil motor 13 7 for driving. Then, by flowing a current in an appropriate direction through the coil 13 9, the movable part 1 is driven by the interaction with the flow of the magnetic flux of the permanent magnet 14 1 based on the so-called “Fleming's left-hand rule”. A driving force is generated for moving in any of the Y directions with respect to 31.
- the same effect as that of the first and second embodiments can be obtained, and the movable part 13 1 and the fixed-side guide part 105,
- the concave-convex structure with 107 a “C” shape By making the concave-convex structure with 107 a “C” shape, it is troublesome to maintain high dimensional accuracy between the vertices as in the first and second embodiments. Can be eliminated. Then, only the surface accuracy (flatness, angle, and straightness) of the inclined surfaces 105a, 107a, 131a, and 131b that make up the "C" need be secured. As a result, processing can be facilitated and the processing cost can be reduced, and it is also resistant to disturbances such as dimensional changes due to thermal expansion.
- the concave-convex portion having the “C” shape is provided at one place, but a configuration in which two or more are provided is also conceivable. .
- a bracket-shaped fixed-side guide portion 201 is used. Thereby, the cross-shaped vibration change used in the third embodiment is performed. ⁇ Ultrasonic vibration can be transmitted to the fixed part 101 side without using the members 121 and 125.
- the long sides 205 and 207 of the fixed part side guide part 201 are similar to the fixed part side guide parts 105 and 107 in the third embodiment. It has slopes 205a and 207a to form a "C" shape.
- the vibration sources 109 and 111 are installed on the left and right, but it is not always necessary for both to generate ultrasonic vibration.
- the two vibration sources 109 and 111 are vibrated in phase and the input vibration power is doubled.
- the same effect as that of the third embodiment can be obtained, and the cross-shaped vibration conversion member and the fixed side in the third embodiment can be obtained.
- the integration of the guides into a bracket-shaped fixed-side guide 201 facilitates further improvement in accuracy.
- a fifth embodiment of the present invention will be described with reference to FIG.
- the vibration sources 109, 1 are provided inside the bracket-shaped fixed-side guide portion 201. This is the arrangement of 1 1. This makes it possible to make the equipment compact.
- a laminated piezoelectric element may be used in addition to the Langevin type vibrator and the single-plate piezoelectric element.
- the number of guide portions is not particularly limited. Further, in each of the above-described embodiments, the driving by the voice coil motor has been described as an example. However, the present invention is not limited to this. For example, a linear motor may be used.
- the present invention relates to an ultrasonic levitation apparatus in which the structure of a guide mechanism is improved to achieve compactness of the apparatus and stability of levitation, and is suitable as, for example, various positioning apparatuses.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2004564057A JP4616008B2 (ja) | 2003-03-17 | 2004-03-16 | 超音波浮上装置 |
EP04720996A EP1612921A1 (en) | 2003-03-17 | 2004-03-16 | Ultrasonic float-up device |
US10/549,170 US20060244342A1 (en) | 2003-03-17 | 2004-03-16 | Ultrasonic float-up device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-071439 | 2003-03-17 | ||
JP2003071439 | 2003-03-17 |
Publications (1)
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WO2004084396A1 true WO2004084396A1 (ja) | 2004-09-30 |
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PCT/JP2004/003465 WO2004084396A1 (ja) | 2003-03-17 | 2004-03-16 | 超音波浮上装置 |
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US (1) | US20060244342A1 (ja) |
EP (1) | EP1612921A1 (ja) |
JP (1) | JP4616008B2 (ja) |
KR (1) | KR20050113236A (ja) |
CN (1) | CN1762088A (ja) |
WO (1) | WO2004084396A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006084018A (ja) * | 2004-08-20 | 2006-03-30 | National Univ Corp Shizuoka Univ | 超音波ガイドユニット |
JP2006247641A (ja) * | 2005-02-14 | 2006-09-21 | Iai:Kk | 超音波浮上装置 |
JP2006304439A (ja) * | 2005-04-19 | 2006-11-02 | Iai:Kk | 駆動装置と案内装置と駆動・案内装置 |
JP2007068367A (ja) * | 2005-09-02 | 2007-03-15 | Tokyo Institute Of Technology | 超音波浮上装置 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008057389B4 (de) * | 2008-11-14 | 2011-03-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Transport eines Objekts über eine Oberfläche |
US20100152074A1 (en) * | 2008-12-17 | 2010-06-17 | Chevron Oronite Company Llc | Lubricating oil compositions |
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- 2004-03-16 KR KR1020057017548A patent/KR20050113236A/ko not_active Application Discontinuation
- 2004-03-16 EP EP04720996A patent/EP1612921A1/en not_active Withdrawn
- 2004-03-16 JP JP2004564057A patent/JP4616008B2/ja not_active Expired - Lifetime
- 2004-03-16 WO PCT/JP2004/003465 patent/WO2004084396A1/ja not_active Application Discontinuation
- 2004-03-16 CN CNA2004800069995A patent/CN1762088A/zh active Pending
- 2004-03-16 US US10/549,170 patent/US20060244342A1/en not_active Abandoned
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JPH07137824A (ja) * | 1993-11-11 | 1995-05-30 | Kaijo Corp | 物体浮揚装置及び該装置を具備した物体搬送装置並びに物体浮揚方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006084018A (ja) * | 2004-08-20 | 2006-03-30 | National Univ Corp Shizuoka Univ | 超音波ガイドユニット |
JP4560626B2 (ja) * | 2004-08-20 | 2010-10-13 | 国立大学法人静岡大学 | 超音波ガイドユニット |
JP2006247641A (ja) * | 2005-02-14 | 2006-09-21 | Iai:Kk | 超音波浮上装置 |
JP2006304439A (ja) * | 2005-04-19 | 2006-11-02 | Iai:Kk | 駆動装置と案内装置と駆動・案内装置 |
JP2007068367A (ja) * | 2005-09-02 | 2007-03-15 | Tokyo Institute Of Technology | 超音波浮上装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4616008B2 (ja) | 2011-01-19 |
JPWO2004084396A1 (ja) | 2006-06-29 |
EP1612921A1 (en) | 2006-01-04 |
CN1762088A (zh) | 2006-04-19 |
KR20050113236A (ko) | 2005-12-01 |
US20060244342A1 (en) | 2006-11-02 |
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