JPH1080162A - Ultrasonic linear motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively transmit vibration of a piezoelectric vibrator to a sliding part member, by excellent closely bringing an anti-wearing part member of the piezoelectric vibrator of an ultrasonic linear motor with the sliding part member. SOLUTION: A anti-wearing part member 2 is installed in a notched part 1a out of three notched parts of a piezoelectric vibrator 1. Split electrodes 3d, 3c are formed by arranging a dividing line 3a on an electrode of one surface, from the notched part 1a on which the anti-wearing part member 2 is arranged to a facing side. A sliding part member 8 is brought into contact with the anti-wearing part member 2 of the notched part 1a, by pressing the piezoelectric vibrator 1 with springs 7a, 7b. Two fixed guide rollers 12, 13 which are arranged keeping a gas greater than the width of the anti-wearing part member 2 on the side part of the sliding part member 8 which faces the hard wearing part member 2 of the piezoelectric vibrator 1 are installed. From the piezoelectric vibrator 1 side, two guide roller 10, 11 are brought into contact with the side part of the sliding part member 8, keeping a gap greater than the fixed guide rollers 12, 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic linear motor in which a sliding member is driven by a triangular piezoelectric vibrator having three notched apex angles.

[0002]

2. Description of the Related Art As shown in FIG. 2, the applicant of the present invention cuts out three apex angles of a piezoelectric vibrator 1 having a triangular planar shape to form notches. The wear-resistant member 2 is mounted on one of the notches 1a, and the electrodes 3 and 4 are mounted on both surfaces of the piezoelectric vibrator 1, and one of the electrodes 3 and 4 is opposed to one of the electrodes 3 from the notch 1a. A dividing line 3a is formed on the side 1b to be formed to form divided electrodes 3b and 3c. An AC power source 6 is connected between each of the divided electrodes 3a and 3b and the other electrode 4 via a switch 5, and a switch 5 By switching the sliding member in contact with the wear-resistant member 2 of the piezoelectric vibrator 1 in one direction or the opposite direction. 7-153851).

As shown in FIG. 3, the wear-resistant member 2 of the piezoelectric vibrator 1 of the stator is brought into contact with springs 7a and 7b so as to press the side of the sliding member 8, and the piezoelectric body One fixed guide roller 9 is mounted on the side of the sliding member 8 of the vibrator 1 that faces the wear-resistant member 2, and the springs 7a, 7
By pressing the piezoelectric vibrator 1 with b, the sliding member 8 is pressed against the fixed guide roller 9, and the guide rollers 10 and 11 mounted on both sides of the piezoelectric vibrator 1 are placed on the side of the sliding member 8. The ultrasonic linear motor is configured so as to contact the unit.

[0004]

However, in the ultrasonic linear motor configured as described above, when the notch 1a at the apex angle of the piezoelectric vibrator 1 vibrates as shown in FIG.
The sliding member 8 rotates around the fixed guide roller 9 and vibrates, and the wear-resistant member 2 of the piezoelectric vibrator 1 does not adhere to the sliding member 8 and slides the vibration of the piezoelectric vibrator 1. There was a problem that it could not be efficiently transmitted to the member 8.

[0005]

According to the present invention, a plane shape is an equilateral triangle, and three apex angles are respectively cut out to form notches, and electrodes are mounted on both sides. A piezoelectric vibrator in which a wear-resistant member is mounted on one of the cutouts provided with the wear-resistant member, and a division line is provided on a side facing the electrode on the one surface to form a division electrode; A sliding member that presses the piezoelectric vibrator with a spring and contacts the wear-resistant member of the notch, and a side of the slide member that faces the wear-resistant member of the piezoelectric vibrator. Two fixed guide rollers which are attached to the portion at a distance larger than the width of the wear-resistant member; and a space between the two fixed guide rollers which is larger than the two fixed guide rollers, and the sliding member from the piezoelectric vibrator side. It consists of two guide rollers contacting the sides. .

[0006]

According to the present invention, a notch is formed by notching three apex angles in a piezoelectric vibrator of an equilateral triangle, and a wear-resistant member provided in one of these three notches is formed. The two fixed guide rollers are mounted at an interval larger than the width, and the fixed guide rollers are mounted so that the wear-resistant member of the piezoelectric vibrator is positioned at a portion facing the sliding member between the two fixed guide rollers. The sliding member is sandwiched between the roller and the wear-resistant member of the piezoelectric vibrator, the sliding member is supported by guide rollers and fixed guide rollers on both sides of the piezoelectric vibrator, and the piezoelectric vibrator is supported by a spring. By pressing the abrasion-resistant member against the sliding member by pressing, vibration caused by rotation of the sliding member can be eliminated, and the sliding member can run stably.

[0007]

FIG. 1 is a schematic structural view of an ultrasonic linear motor according to an embodiment of the present invention, wherein 1 is a piezoelectric vibrator, 7a and 7b are springs, 8 is a sliding member, and 10 and 11 are guide rollers. Since these structures are the same as those of the above-described conventional example, description thereof will be omitted, but in the present embodiment, the wear resistance member 2 of the piezoelectric vibrator 1 is
The fixed guide rollers 12 and 13 are brought into contact with the side of the sliding member 8 facing the wear-resistant member 2 at an interval larger than the width of the guide rollers 10 and 11 and the piezoelectric vibrator 1 is Is pressed against the sliding member 8, and the guide rollers 10 and 11 are respectively brought into contact with the sliding member 8.

In the ultrasonic linear motor of this embodiment having the above-described structure, the sliding member 8 is formed by the two fixed guide rollers 12 and 13, the piezoelectric vibrator 1 and the guide rollers 11 and 12.
, The piezoelectric vibrator 1 has springs 7a, 7b
When the piezoelectric vibrator 1 is pressed, the wear-resistant member 2 of the piezoelectric vibrator 1 is in close contact with the sliding member 8, and the guide rollers 11 and 12 on both sides of the piezoelectric vibrator 1 are brought into contact with the sliding member 8. Accordingly, the sliding member 8 is stably supported, the vibration of the piezoelectric vibrator 1 is efficiently transmitted to the sliding member 8, and the occurrence of speed unevenness during the running of the sliding member 8 can be suppressed. .

[0009]

As described above, in the ultrasonic linear motor of the present invention, the piezoelectric vibrator is pressed by the spring between the two fixed guide rollers via the sliding member.
A guide roller is provided outside the fixed guide rollers on both sides of the piezoelectric vibrator and the sliding member is supported together with the fixed guide roller, so that the sliding member is stably supported, and the vibration of the piezoelectric vibrator is efficiently performed. There is an advantage that the speed is transmitted to the sliding member and the occurrence of speed unevenness during traveling of the sliding member can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an ultrasonic linear motor according to one embodiment of the present invention.

FIG. 2 is a configuration diagram of a stator of an ultrasonic linear motor proposed by the present applicant.

FIG. 3 is a configuration diagram of a conventional ultrasonic linear motor.

FIG. 4 is a configuration diagram illustrating a defect in the operation of the ultrasonic linear motor in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piezoelectric vibrator 2 Abrasion member 7a, 7b Spring 8 Sliding member 10, 11 Guide roller 12, 13 Fixed guide roller

Claims (1)

[Claims] 1. A plane having a regular triangular shape, a notch formed by cutting three apex angles, and electrodes mounted on both sides, and an abrasion-resistant member in one of the notches. A piezoelectric vibrator having a split electrode formed by providing a split line on a side facing the electrode on the one surface from the cutout portion provided with the wear-resistant member, and the piezoelectric vibrator formed by a spring; A sliding member that presses against the wear-resistant member of the notch portion, and a side of the slide member that faces the wear-resistant member of the piezoelectric vibrator. Two fixed guide rollers mounted at an interval greater than the width, and two fixed guide rollers spaced apart from the two fixed guide rollers and contacting the side of the sliding member from the piezoelectric vibrator side Ultrasonic linear motor comprising a guide roller .