JPS59194678A - Motor device utilizing supersonic vibration - Google Patents

Abstract

PURPOSE:To obtain strong rotary force and drive force of arbitrary direction by converting vibration energy of supersonic wave into a rotary or rectilinear motion. CONSTITUTION:A bearing 22 and a rod-shaped member 21 are slidably engaged. The bearing 22 and a casing body 23 are rotatably mounted. A switching lever 26 is secured integrally to the bearing 22. Supersonic vibrators C, D are disposed to hold in parallel state at a suitable interval to the vicinity of the edges of the sides of the member 21. Planar vibrating pieces 24a, 24b are integrally formed at a suitable angle in reverse direction to the axial direction of the member 21 on one end faces of the vibrators C, D. The member 21 is rotated by driving the vibrators C, D and operating an operating lever 26. The member 21 is rectilinearly moved in normal or reverse direction in response to the rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor device that converts reciprocating motion of a moving body into unidirectional motion using ultrasonic vibrations.

Most of the various motor devices that have been widely used in the past utilize electromagnetic force as their driving source, and are used for various purposes. However, the size, weight, rotational force, etc. of these devices are subject to certain limitations depending on the materials used. This is because the above-mentioned factors are determined by the magnetic properties of the materials used, and devices exceeding these properties cannot be rotated.

Unlike these conventional motor devices, according to the present invention, a small and lightweight motor device can be obtained by converting the strong vibration energy of ultrasonic waves into unidirectional motion of a moving object.

Particularly, an object of the present invention is to obtain a motor device that utilizes ultrasonic vibrations that can be switched between forward and reverse directions in the linear motion of a rod-shaped moving body by operating a lever. In order to achieve the above object, the bearing part 22 and the rod-shaped member 21 are fitted in a slidable manner, the bearing part 22 and the casing body 23 are rotatably attached, and the bearing part 22 and the switching lever 26 are integrated. It consists of a rod-shaped member 21 having a polygonal cross-section on which a moving object can slide in the direction of the force of the hand. The ultrasonic transducers C and D are arranged so as to be held parallel to each other, and plate-shaped vibrating pieces are provided on one end surface of the ultrasonic transducers C and D at appropriate angles in directions opposite to each other with respect to the axial direction of the rod-shaped member 21. 24a,
24b, the rod-shaped member is rotated by moving the switching lever, and the ultrasonic vibration is converted into a rectilinear motion in the forward and reverse directions of the moving body according to the rotation of the rod-shaped member. The purpose is to obtain the motor device that was used.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partially enlarged view for explaining the driving principle of the motor device according to the present invention, and as shown in FIG. The lowest part in contact with one end surface 3b of the moving body 3 is X-yJ! Set as the origin of mark i. At this time, the normal to the moving body surface of the vibrating element 2 [the inclination θ] needs to be smaller than the maximum static friction angle.

This is because the force that the vibrating element 2 receives from the moving body 3 is the force fx in the normal direction of the moving body 3 and the force f in the tangential direction of the moving body 3, as shown in FIG.
Since it is expressed as a component of y, the friction coefficient μ between the vibrating element 2 and the moving body 3 is the maximum static friction angle θs''jan'μ. Therefore, one end surface 1a of the vibrating element 2 can be efficiently maintained without slipping (driving In order to receive the force, the inclination θ of the vibrating element 2 must be smaller than the maximum static friction angle θS.

Next, as shown in FIG. 1(B), when the vibrator 1 starts vibrating and is displaced by +ΔX in the X direction, one end surface 2a of the vibrating piece 2 is pushed in the +X direction. During this time, a component force ry is generated due to the inclination angle θ and the force fx in the X direction shown in FIG. 2, and a force acts on the moving body 3 to push it up in the +yX direction, causing it to move by +Δy.

Next, as shown in Fig. 1(C), the vibrator 1 is moved by -X direction
When the vibrating element 2 is displaced by a certain amount, the one end surface 2a of the vibrating element 2 and the one end surface 3b of the moving body 3 are separated, and no frictional force is exerted between them. The moving body 3 moves in the y direction due to inertial force during this period as well. Further, as the vibrator 1 continues to vibrate, it becomes the state (A) again and repeats the above operation, so that the moving object 3 continues to move.

In the above description, the case where the vibrating piece 2 is formed integrally with the vibrator 1 is shown, but it is clear that it operates in the same way even when it is formed integrally with the moving body 3, 1゜Figure 3 shows the locus of one end surface 2a of the vibrating element 2 in Figure 1, but the locus point A
→B comes into contact with the moving body 3 and drives the moving body 3 in the direction of the arrow.

However, one end surface 2a of the vibrating piece 2 separates from the moving object 3 at the trajectory point B, passes through the trajectory point c-D→E, reaches the trajectory point A, and comes into contact with the moving object 3.

FIG. 4 is a graph of the operating state shown in FIG. 3 using time t; FIG. shows the motion displacement and velocity vy of one end surface 2a of the vibrating piece 2.

Note that the period between the time opening t and L2 corresponds to the opening of the locus point A→B. Then, one end surface 2a of the vibrating piece 2 and the moving body 3 are in contact with each other, and the moving body 3 is moved in the +yX direction.

The period of time opening t2 to t3 corresponds to the opening of locus points B→C→D−+E→A. Then, one end surface 2a of the vibrating piece 2 and the moving body 3
have separated from each other, and the moving body 3 is inertially moving.

The motor device using ultrasonic vibration according to the present invention operates based on the principle of operation explained above, and an embodiment applied to an actual device will be described with reference to FIG.

In this example, a rod-shaped member 21 having a polygonal cross-section that can slide in the direction of the hand force is used as a moving body, and the rod-shaped member 21 is configured so that the sliding direction can be in any direction, forward or reverse. FIG. 5(A) is a longitudinal cross-sectional view showing one embodiment of the present invention, FIG. 5(B) is a cross-sectional view taken along line BB of FIG. 5(A), and FIG. ) is a sectional view taken along c-cH of FIG. 5(A).

The rod-shaped member 21 is slidably mounted within the casing body 23 by a bearing portion 22 . The ultrasonic vibrators C and D are vibrators provided close to the rod-shaped member 21, and the vibrating piece 2
4g and 24b are respectively led out and set so as to be able to contact near the edges of each side of the rod-shaped member 21. Vibration piece 24a
, 24b are suitably plate-shaped, and are integrally formed with vibrators provided at appropriate angles in directions opposite to the direction of movement of the rod-shaped member. 25 is each vibrator C,
This is a vibrator support member for connecting D, and is fixed to the casing body 23.

The rod-shaped member 21 and the switching lever 26 are interlocked via the bearing portion 22. For example, by moving the switching lever 26 in the direction of arrow S, rotational movement is generated in the rod-shaped member 21. The vibrating pieces 24a, 2'4b are shown in FIG.
B) and FIG. 5(C), as the rod-shaped member 21 rotates, only one side of the vibrating piece is forced into contact with the rod-shaped member 21, and the other side of the vibrating piece is forcibly brought into contact with the rod-shaped member 21. make them leave.

The vibrating pieces 24a and 24b are set at appropriate angles in directions opposite to each other with respect to the operator's direction of the rod-shaped member 21. That is, all the vibrating pieces 24a are tilted in the same direction, and all the vibrating pieces 24b are tilted in the opposite direction.

Here, FIG. 5(A), FIG. 5(B) and FIG. 5(C)
), the relationship between each component with a focus on the bearing section 22 will be explained. The bearing section 22 and the rod-shaped member 21 are fitted in a slidable manner, and the bearing section 22 and the casing body 23 are rotatably attached. , the bearing portion 22 and the switching lever 26 are integrally fixed.

In such a configuration, as shown in FIG. 5(B),
When the switching lever 26 is moved in the S direction, the rod-shaped member 21 rotates as shown in (c), so that only the vibrating piece 24b comes into contact with one end of the rod-shaped member 21, and the rod-shaped member 21 is moved as shown in FIG. 5(A). By starting sliding in the direction (2) shown, a straight movement is induced.

Next, when reversing the direction of the linear movement, by moving the switching lever 26 in the direction of the arrow, only the vibrating piece 24a connected to the vibrator C comes into contact with one end of the rod-shaped member 21, and the vibration of the vibrator C When the vibrating piece 24a is driven, its reciprocating movement starts sliding in the direction shown in (E) of the rod-shaped member 21.

The present invention differs from various conventional motor devices in that it uses an innovative method of converting the powerful vibrational energy of ultrasonic waves into rotational or linear motion, resulting in powerful rotational force and driving force. It has the great effect of providing a motor device that can switch the straight direction of a moving object to any direction, and is extremely effective in that it can be applied to many applications in place of conventional motor devices. It is valid.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged view for explaining the driving principle of the motor device according to the present invention, and Fig. 2 shows the relationship between the tilt angle θ and the component force fx due to the displacement fx in the operation explained in Fig. 1. 3 is an explanatory diagram showing the locus of the vibrating element, FIG. 4 is a graph showing the relationship between the operating state and time, and FIG. 5 (A) is a longitudinal sectional view showing an embodiment according to the present invention. Figure 5 (B) is the fifth
A cross-sectional view taken along line B-B in Figure (A) and Figure 5 (C
) is a sectional view taken along line CC in FIG. 5(A). 1..., vibrator, 2, 24a. 24b... vibrating piece, 3... moving object,
11... Rotating shaft, 22... Bearing part,
723...Casing body, Reference = C, D...Ultrasonic vibrator, 25...
・Supporting member, 26...Switching lever, 2
1... Rod-shaped member, patent applicant Shinsei Kogyo Co., Ltd. Figure 1 Figure 5 (C)

Claims (1)

[Claims] The bearing portion 22 and the rod-shaped member 21 are slidably fitted,
The bearing part 22 and the casing main body 23 are rotatably mounted, the bearing part 22 and the switching lever 26 are integrally fixed, and the rod-shaped member 21 has a polygonal cross section on which a movable body can slide in the longitudinal direction. , the ultrasonic transducers C and D are arranged so as to be held parallel to each other with appropriate spacing near the edges of each side of the rod-shaped member 21, and one end surface of the ultrasonic transducers C and D is Plate-shaped vibrating pieces 24a are angled at appropriate angles in directions opposite to each other with respect to the axial direction of the rod-shaped member 21. 24b, the rod-shaped member is rotated by moving the switching lever, and the ultrasonic vibration is converted into a rectilinear motion in the forward and reverse directions of the moving object according to the rotation of the rod-shaped member. The motor device used.