JPS6311074A - Vibrating motor by inertia driving method - Google Patents

Abstract

PURPOSE:To make a motor in small size and lightweight capable of yielding large output with high efficiency, by getting an inertia mass to perform accelerated motion with laminate type piezoelectric displacement elements, and by getting the inertia force resulting therefrom to act on the moving body through the laminate type piezoelectric displacement elements. CONSTITUTION:A moving body 2 is fixed to an end vibrating face of a laminate type piezoelectric displacement element 1 and an inertia mass 3 is fixed to the other end vibrating face. This moving body 2 is built into a frame 5 through a roller bearings 4 with a one-way clutch, which is a one-way rotating guide. Further, serrate voltage is supplied from a power source section 6 to the laminate type piezoelectric disdplacement elements 1 through a wiring cord 7 and a sliding contact 8. In this way, the abovementioned piezoelectric elements 1 repeat the telescopic motion with the power source frequency in which the displacement elements 1 extend quickly towards lamination and slowly shrink lamination. With this quick extension, impact inertia force is yielded to the inertia mass 3, by which the moving body 2 can be rotated in the direction of the arrow.

Description

Detailed Description of the Invention When the inertial mass (3) is accelerated by the laminated piezoelectric displacement element (1), the inertial force generated in the inertial mass (3) is transferred to the moving body ( 2).

This is an inertial drive type vibration motor that uses this inertial force as the driving force for the moving body (2).

Conventional electromagnetic motors have large electrical losses, and in order to use them at low speeds and high torque, it is essential to use a reduction gear.

Therefore, when used at low speeds and high torque, the energy efficiency is low, and the structure is large and heavy. The present invention aims to eliminate these drawbacks.

The content of the present invention will now be explained with reference to the drawings.

To explain its structure, (a moving object (
2) is fixed, and an inertial mass (3) is fixed to the vibration surface at the other end.

(b) The moving body (2) is a one-way rotation guide,
It is assembled to the 7-frame (5) via a rotary bearing (4) with a chi.

(c) Sawtooth voltage is applied to the multilayer piezoelectric displacement element (1) via the wiring cord (7) and sliding contact (8) to the power supply section (6).
Supplied by

Because of this configuration, the laminated piezoelectric displacement element (
1) via the wiring cord (7) and sliding contact (8),
When a sawtooth voltage with a steep rise and a slow fall is applied from the power supply section (6), the laminated piezoelectric displacement element (1) rapidly expands in the lamination direction and then slowly contracts in the lamination direction, causing a stretching vibration at the power supply frequency. Repeat. This rapid elongation creates an impulsive inertial force on the inertial mass (3), causing the moving body (2) to rotate in the direction of the arrow. In this gradual contraction, the inertial mass (3
), but even if a slight inertial force is generated, the rotating bearing (4) with a one-way clutch prevents the moving body (2) from reversing. Furthermore, even if an external load is applied when the moving body (2) is stopped, the rotating bearing (4) with a one-way clutch prevents the moving body (2) from reversing.

In this way, it is possible to obtain a low-speed large torque output with a small size, light weight, and high efficiency.

In addition, if the Asahi rotary bearing link with one-way clutch (4) is a reciprocating bearing with one-way clutch and the moving body (2) is supported on the frame (5) so that it can move straight in one direction, the moving body (2) goes straight in the direction of the arrow. In this way, it is possible to obtain a large driving force at low speed with a small size, light weight, and high efficiency.

Moreover, a magnetostrictive displacement element and an electromagnetic coil can be used as the displacement element instead of the laminated piezoelectric displacement element (1).

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the present invention Fig. 2 is a perspective view of the rotating bearing with one-way clutch of the present invention as a reciprocating bearing with one-way clutch Fig. 3 is a perspective view of the magnetostrictive displacement element and the electromagnetic coil (1) is a laminated piezoelectric displacement element (2) is a moving body (3) is an inertial mass (4) is a rotating pair with a one-way clutch 1J ring
(5) is the frame (6) is the power supply section (7) is the wiring cord (8) is the sliding contact diagram Figure 1

Claims (1)

[Claims] 1 (a) A driving force generating unit in which a vibrating surface at one end of the laminated piezoelectric displacement element (1) is fixed to a moving body (2), and a vibrating surface at the other end is fixed to an inertial mass (3). (b) A rotating bearing (4) with a one-way clutch that supports the moving body (2) on the frame (5). (c) A wiring cord (7) and a sliding contact (8) to the laminated piezoelectric displacement element (1). A power supply unit (6) that charges a sawtooth voltage. An inertial drive type vibration motor 2 configured as described above. A reciprocating bearing with a one-way clutch instead of a rotary bearing with a one-way clutch (4) drives the moving body (2). An inertial drive type vibration motor 3 as set forth in claim 1 supported on a frame (5) as set forth in claims 1 and 2, wherein the laminated piezoelectric displacement element (1) is a magnetostrictive displacement element and an electromagnetic coil. Inertial drive vibration motor