JP5362235B2 - Compound vibrator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compound vibrator of high power output, high rigidity, high efficiency, long life and space-saving. <P>SOLUTION: The compound vibrator is provided with two or more vibrators 1 with a required angle 5 toward the radial direction of a central axis 4 of the compound vibrator and further with a required angle 7 toward a vibration radiating plane 6. Provision of the vibrators with required angle 5 toward the radial direction of the central axis 4 of the compound vibrator generates vibration in a twisting direction and provision of the vibrators with required angle 7 toward the vibration radiating plane 6 generates vibration in a longitudinal direction. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a composite vibrator used in vibration application equipment such as an ultrasonic motor and an ultrasonic processing machine.

Some conventional composite vibrators are provided with a plurality of longitudinal vibrators in the outer circumferential tangential direction of the metal cylinder and one longitudinal vibrator in the axial direction of the metal cylinder (for example, see Non-Patent Document 1). The problem is that the resonance frequency, impedance, and temperature characteristics of the vibrator do not match due to the difference in the shape and location of the vibrator for torsional vibration and longitudinal vibration, and high output cannot be obtained. In addition, the apparatus is large and the circuit is complicated.

Further, there is an elastic body in which a plurality of oblique slit grooves are formed (for example, see Patent Documents 1 and 2). The problems are fatigue fracture of the slit due to stress, loss of vibration energy, and difficulty in slit formation. Further, in the case of Patent Document 2, since the vibration source is a type in which an electrostrictive vibrator is attached, an output as high as that of a bolted Langevin vibrator cannot be obtained.

Further, there is a combination of longitudinal and torsional vibration piezoelectric elements (see, for example, Patent Document 3). The problem is that the mechanical strength of the piezoelectric element for torsional vibration is lower than that of the piezoelectric element for longitudinal vibration, and it is difficult to obtain a high output. Moreover, the cost of the torsional vibration piezoelectric element is high.

Moreover, there is one provided with a torsional vibrator (see, for example, Patent Document 4). The problem is the loss of vibration energy due to the small drive area and the provision of the torsional vibrator.

In addition, there is a conventional ultrasonic motor in which a vibrator is arranged at a required angle with respect to the radial direction of a rotating body (see, for example, Non-Patent Document 2). The problem is that a high output cannot be obtained because the contact drive area is small.
JP-A-7-75353 (FIG. 1) Japanese Patent Laid-Open No. 7-194154 (FIG. 2) JP-A-6-54562 (FIG. 1) Japanese Patent Laid-Open No. 10-66361 (FIG. 1) “Load Characteristics of Ultrasonic Motor Using Torsional Vibrating Cylinder Ultrasonic Rotation Device Using Longitudinal-Torsional Transform (44)” Atsuyuki Suzuki, Masanori Kihara, Yasuhiro Katsumata, Keisuke Ishii, Jiro Kanno Proceedings of the 2005 Spring Research Conference pp. 895-896 2005 “Driving characteristics of a robot hand with an ultrasonic motor as a finger (2nd report, driving characteristics by PWM)” Kenji Nishibori Japanese Society of Mechanical Engineers, Vol. 64, No. 623, Part C, pp. 2557-2562, 1998

  The present invention is intended to solve the above-described problems, and an object of the present invention is to realize a composite vibrator having high output, high rigidity, high efficiency, long life, and space saving.

In order to achieve the above object, according to the present invention, the composite vibrator according to claim 1 is a composite vibrator in which a plurality of vibrators are arranged rotationally symmetrically, and the vibrators are arranged rotationally symmetrically. In order to generate a torsional vibration with respect to the rotationally symmetric central axis of the provided composite vibrator, the composite vibrator is provided at a predetermined angle with respect to the radial direction of the central axis , and the vibration radiation of the composite vibrator In order to generate a vibration in a direction perpendicular to the surface, the vibration radiation surface is provided at a predetermined angle.

  The second problem solving means is to provide a plurality of vibrators in an integrated elastic body.

As a third means for solving problems, the composite transducer as set forth in claim 2, in the composite resonator according to claim 1, wherein each transducer comprises a horn, the vibration exit surface of this horn side it is those provided.

The operation of the first aspect of the present invention according to the first aspect is as follows. In other words, high-power, high-rigidity, high-efficiency, and inexpensive vibrators can be used, and the entire device is not easily damaged by fatigue, resulting in a high-power, high-rigidity, high-efficiency, long-life, and low-cost composite vibrator. it can. In addition, it is easy to match the resonance frequency, impedance, and temperature characteristics of all the vibrators.

  The operation of the second problem solving means is as follows. That is, the vibration energy of each vibrator can be converged in one place. Therefore, high output and space saving are possible.

The operation of the invention according to claim 2 as the third problem solving means is as follows. That is, the vibration amplitude can be expanded by providing a horn to each vibrator. In addition, since it can be provided with a required angle with respect to the vibration radiation surface by utilizing the inclination of the horn, it is possible to make a structure with little loss of vibration energy.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of an embodiment of a composite vibrator according to the present invention.

  The composite vibrator of the present embodiment shown in the figure is roughly composed of a vibrator 1 such as a bolted Langevin vibrator and a vibration synthesizer 2 that fixes each vibrator 1 and synthesizes vibrations. When the composite vibrator of this embodiment is connected to other elements, the center axis female thread portion 3 is used.

  Each vibrator has a required angle 5 (for example, 90 degrees) with respect to the radial direction of the central axis 4 and also has a required angle 7 (for example, 30 degrees or 60 degrees) with respect to the vibration radiation surface 6. The vibration synthesizer 2 is connected by a bolt 8. Also, each connection surface is well polished and sufficiently adhered. By providing with a required angle 5 with respect to the radial direction of the central axis 4, vibration in the torsional direction is generated, and by providing with a required angle 7 with respect to the vibration radiation surface 6, longitudinal vibration is generated. Let

The vibrator 1 and the vibration synthesizer 2 are made of an elastic material such as aluminum alloy, stainless steel, or titanium. The bolt 8 uses an elastic body such as stainless steel.

FIG. 2 is a diagram showing another embodiment of the present invention. This is an example in which a horn 10 such as a conical horn is provided in each vibrator. A tip portion 11 having a vibration radiation surface 6 is provided at the tip of the horn 10. When the composite vibrator of the present invention is applied to an ultrasonic motor, it is used in a state where an elastic body 12 (rotor) such as steel or stainless steel is pressed against the vibration radiation surface 6. Further, vibration can be synthesized by adhering or pressing the elastic body 12 to the vibration radiation surface.

FIG. 3 shows an example of the shape of the vibration radiation surface 6. FIG. (B) shows an example in which a groove 13 is provided in FIG.

Application Example to Ultrasonic Motor FIG. 4 shows an example in which the composite vibrator of the present invention is applied to an ultrasonic motor. The ultrasonic motor of this embodiment shown in the figure is roughly composed of a composite vibrator (stator) 20 and a rotor 21 of the present invention, a pressure application mechanism 22 and a fixing flange 23. The contact surface of the composite vibrator 20 and the rotor 21 is well polished and adhered with silicon carbide or the like. The pressure application mechanism 22 is generally composed of a fixing tool 24 such as a nut, a center shaft 25, and an elastic body 26 such as a spring spring and a coil spring, and is applied between the stator 20 and the rotor 21 depending on the position of the fixing nut 24. Adjust the pressure. The rotor 21 is provided with a protrusion 27 for taking out the driving force.

Application Example to Ultrasonic Machine The composite vibrator of the present invention can be applied to a processing machine such as an ultrasonic cutting machine, an ultrasonic polishing machine, and an ultrasonic welding machine. FIG. 5 shows an example applied to an ultrasonic cutting machine. The ultrasonic cutting machine according to the present embodiment shown in the figure is roughly composed of the composite vibrator 20, the vibration horn 30 and the cutting edge 31 of the present invention. The cutting blade 31 is fixed with a bolt 32.

FIG. 6 shows an example in which the composite vibrator 20 of the present invention is applied to an ultrasonic welding machine. The ultrasonic welding machine of the present embodiment shown in the figure is roughly constituted by the composite vibrator 20 of the present invention, a vibration horn 30, and a welding tip portion 33. The workpiece 34 is placed on the anvil 35, and this apparatus is pressed and welded.

Application Example to Ultrasonic Stirrer FIG. 7 is an example in which the composite vibrator 20 of the present invention is applied to an ultrasonic stirrer. The ultrasonic stirrer of the present embodiment shown in the figure is roughly constituted by the composite vibrator 20 of the present invention, the vibration horn 30 and the stirring rod 40. The object to be stirred 41 is put into a container 42 such as a beaker and stirred.

Ultrasonic motors for robots, elevators, escalators, automatic doors, forklifts, space motors, etc. where high output, high rigidity, high efficiency, quietness, and space saving are desired Can be used. Further, since the ultrasonic motor does not generate a magnetic field and is not affected, it can be used in a high magnetic field environment such as MRI.

It can be used for various powerful ultrasonic equipment such as an ultrasonic welding machine, an ultrasonic cutting machine, an ultrasonic agitator and the like that require high performance (high speed, stabilization, and energy saving).

1 is an external view of a composite vibrator according to a first embodiment of the present invention. It is an external view of the composite vibrator concerning the 2nd Embodiment of this invention. It is an example of the shape of a vibration radiation surface. 1 is an external view of an ultrasonic motor using a composite vibrator of the present invention. It is an external view of the ultrasonic cutting machine using the composite vibrator of the present invention. It is an external view of the ultrasonic welding machine using the composite vibrator of the present invention. It is an external view of the ultrasonic stirrer using the composite vibrator of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibrator 2 Vibration synthesizer 3 Female thread part 4 Central axis 5 Installation angle 6 of vibrator with respect to radial direction of central axis 6 Vibration radiation surface 7 Installation angle 8 of vibrator with respect to vibration radiation surface Bonding bolt 10 Horn 11 Tip part 12 Elastic body 13 Groove 20 Composite vibrator 21 Rotor 22 Pressure applying mechanism 23 Flange 24 Fixing tool 25 Central shaft 26 Elastic body 27 Projection part 30 Horn 31 Cutting edge 32 Bolt 33 Welding tip part 34 Workpiece 35 Anvil 40 Stirring bar 41 Stirring object 42 Container

Claims (2)

A composite vibrator in which a plurality of vibrators are arranged in a rotationally symmetric manner, wherein each vibrator generates a vibration in a torsional direction with respect to the rotationally symmetric central axis of the composite vibrator arranged in the rotationally symmetric manner. to make, provided to form a predetermined angle with respect to the radial direction of the central axis, and wherein in order to generate vibrations in a direction perpendicular to the vibration exit surface of the composite transducer, predetermined with respect to the vibration exit surface A composite vibrator characterized by being provided to form an angle.   2. The composite vibrator according to claim 1, wherein each of the vibrators includes a horn, and a vibration radiation surface is provided on a side surface of the horn.

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