TWI513172B - The ultrasonic driving system - Google Patents

Description

Ultrasonic drive system

The invention relates to a driving system, in particular to an ultrasonic driving system with simple structure, convenient assembly, large vibration displacement, good heat dissipation effect and wide application.

Conventional drive system, such as the small transport vehicle or piezoelectric vehicle described in I289468 (2007/11/11 Republic of China invention patent announcement); the piezoelectric vehicle includes a seat body, a piezoelectric motor, a passive component and a drive circuit. Wherein, the piezoelectric motor and the passive component are coupled to the base body to respectively transmit and provide driving power, the piezoelectric motor has a piezoelectric stator for supplying power, and a rotor for transmitting power against the piezoelectric stator, a shaft for maintaining the piezoelectric stator and the rotor, an elastic member for providing pre-stress to the piezoelectric stator and the rotor, and a limiting member for positioning the rotor, and the piezoelectric motor can output power through the driving circuit Let the piezo car drive on the track or on the ground. However, the main structures and components constituting such a piezoelectric vehicle are too complicated and numerous, such as the main components and detailed components disclosed in Fig. 7 of I289468, including metal tubes, piezoelectric ceramic sheets, rotors, shafts, elastic members, and limiting members. , gaskets, screw caps, transmission components, bearings, steel rings, gears, bearings, shafts, steel rings, front mounts, conductive sheets and rear mounts are no less than a dozen. Due to the complexity and numerous components, the piezoelectric vehicle is very difficult to assemble; in addition to increasing manufacturing costs, the quality instability is relatively increased. In addition, the mechanical energy transmitted from the piezoelectric stator is transmitted to the steel ring and the track through the gear set; the mechanical energy of the output is again lost, so that the overall output performance of the piezoelectric vehicle is greatly reduced. Furthermore, before the base body is formed, the fixing seat, the conductive piece and the rear fixing seat are made of a plastic material or an insulating material, so that the high temperature or high heat generated by the piezoelectric stator during driving cannot be dissipated through the base body. Such high temperature or high heat phenomenon may change the boundary condition of the fixed piezoelectric stator in addition to changing the driving condition of the piezoelectric stator; that is, the vibration amplitude of the piezoelectric stator and the rotation speed of the rotor may be lowered.

In summary, conventional drive systems, or piezoelectric vehicles, still have their relative disadvantages, as follows:

(1) The main components and the detailed components are too complicated, resulting in difficulty in assembly and increasing manufacturing costs;

(2) Excessive energy conversion components cause a large increase in friction, which in turn leads to a decrease in the overall output efficiency of the piezoelectric vehicle;

(3) The design of the seat is poor, resulting in the piezoelectric stator not being able to dissipate heat immediately, which may cause the speed of the piezoelectric vehicle to be reduced or unable to travel.

The present invention is based on the above-mentioned conventional devices and still has its relative disadvantages, and is improved by brainstorming.

The main object of the present invention is to provide a supersonic drive system with a simple structure, which makes the assembly of the ultrasonic drive system more convenient and efficient.

Another object of the present invention is to provide an ultrasonic drive system which is excellent in vibration and heat dissipation, so that the ultrasonic drive system in operation can generate high vibration displacement without generating high temperature.

The final object of the present invention is to provide a versatile ultrasonic drive system that can be used on small vehicles or on small electromechanical systems.

The invention relates to an ultrasonic driving system which is composed of a base, a piezoelectric ceramic piece, a rotor, an elastic element, a clamping element and a shaft; the piezoelectric ceramic piece can be attached to the base The upper end and the side of the two ends, and the rotor, the elastic element and the clamping element can be respectively disposed at the two ends of the base through the shaft; in operation, as long as the appropriate driving frequency and voltage are applied to the piezoelectric ceramic piece, It can drive the rotor to rotate.

The ultrasonic drive system of the present invention is mainly improved in that the base is an I-shaped electrically conductive metal body, and is provided with a front rod, a front slot, a through hole, a rear slot and a rear. a rod; wherein the front rod and the rear rod are respectively provided with conical perforations; further, the size of the front slot, the perforation and the rear slot can be appropriately enlarged or reduced as needed. Among them, the size of the front slot and the rear slot are designed according to the occurrence of the 1/4 and the rear 1/4 of the front and rear bars in the best vibration mode, and the purpose is to make the ultrasonic drive system Better drive efficiency. In addition, the pedestal is integrally formed and designed for the metal body, except for the convenience of connecting the grounding wire; the biggest purpose is to facilitate the rapid heat dissipation of the piezoelectric ceramic piece during operation to avoid detrimental The driving efficiency of the ultrasonic drive system. Furthermore, the ultrasonic drive system can be attached to the piezoelectric ceramic sheets on both sides of the front and rear rods of the base, and can achieve the optimal driving effect according to different driving frequencies and phase angles. Finally, after the pole or the rear rod of the base is attached to the piezoelectric ceramic piece, the mechanical energy generated by the front rod or the rear rod can be directly transmitted to the rotor during driving, without having to pass through other detailed components. To avoid unnecessary energy loss.

In summary, the ultrasonic drive system of the present invention has improved the relative disadvantages of the conventional device; and its function makes the ultrasonic drive system more industrially utilized, novel and progressive.

The composition and the embodiments of the present invention will be described below in conjunction with the first to fourth figures, so that those skilled in the art can easily understand the main features of the present invention and the effects or objects to be achieved.

The present invention is an ultrasonic driving system comprising a susceptor 1, a piezoelectric ceramic sheet 2, a rotor 3, an elastic member 4, an intimate member 5 and a shaft 6; characterized in that: the piezoelectric ceramic sheet 2 can be attached to the upper surface and the side surfaces of the base 1, and the rotor 3, the elastic member 4 and the abutting member 5 can be respectively installed at the two ends of the base 1 through the shaft 6; Piezoelectric ceramic sheet 2 is applied with an appropriate driving frequency ( ω _i or f _i , i = 1, 2, 3 or 4 ), phase angle ( ψ _i , i = 1, 2, 3 or 4 ) and voltage ( V _pp ), the rotor 3 can be driven to rotate (as shown in the third figure).

The ultrasonic drive system as described above, wherein the base 1 is an I-shaped electrically conductive metal body, and is provided with a front rod 11, a front slot 12, a through hole 13, a rear slot 14 and a rear The front rod 11 and the rear rod 15 are respectively provided with conical perforations (111, 151); further, the size of the front slot 12, the through hole 13 and the rear slot 14 can be appropriately enlarged or reduced as needed.

The ultrasonic drive system as described above, wherein the rotor 3 is provided with an O-shaped friction ring 31, an annular groove 32, a cone 33 and a through hole 34; the O-shaped friction ring 31 can be sleeved in the annular groove 32. on.

The ultrasonic drive system as described above, wherein the abutment member 5 is provided with a screw hole 51, a through hole 52 and a screw 53; wherein the screw 53 is provided with a hexagonal blind hole 531.

Another embodiment of the present invention, as shown in the fourth figure, is composed of a base 1, a piezoelectric ceramic piece 2, a rotor 3, an elastic member 4, an intimate member 5, and a shaft 6; The piezoelectric ceramic sheet 2 can be attached to the upper surface and the side surfaces of the two ends of the base 1, and the rotor 3, the elastic member 4 and the abutting member 5 can be respectively mounted on the two ends of the base 1 through the shaft 6; When the piezoelectric ceramic piece 2 is applied with an appropriate driving frequency, phase angle and voltage, the rotation of the rotor 3 can be driven; wherein the rotor 3 can be a gear-shaped one, thereby driving other gears or gear sets to rotate. (not shown).

In summary, the ultrasonic drive system of the present invention has been in line with the industrial applicability; and the related device or the prior case has been found to meet the novelty in the patent application requirements; and the main technology constituted by the present invention And the characteristics are also significantly more powerful than the conventional devices, and also meet the progressive nature of the patent application requirements, so I ask the members to give the invention patents!

1. . . Pedestal

11. . . Front pole

111. . . Conical perforation

12. . . Front slot

13. . . perforation

14. . . Rear slot

15. . . Rear rod

151. . . Conical perforation

2. . . Piezoelectric ceramic sheet

3. . . Rotor

31. . . O-shaped friction ring

32. . . Annular groove

33. . . Cone

34. . . perforation

4. . . Elastic component

5. . . Closed component

51. . . screw hole

52. . . perforation

53. . . Tightening screw

531. . . Hexagon blind hole

6. . . Shaft

The first figure is a group diagram of the present invention;

Second figure: an exploded view of the present invention;

Third figure: a mode of implementation of the present invention;

Fourth Figure: Another embodiment of the present invention.

1. . . Pedestal

2. . . Piezoelectric ceramic sheet

3. . . Rotor

4. . . Elastic component

5. . . Closed component

6. . . Shaft

Claims (5)

An ultrasonic driving system consisting of a base, a piezoelectric ceramic piece, a rotor, an elastic element, a clamping element and a shaft; wherein the base is an electrically conductive metal body integrally formed, The utility model is provided with a front rod, a front slot, a through hole, a rear slot and a rear rod. The size of the front slot, the through hole and the rear slot can be appropriately enlarged or reduced as needed, and the front slot is And the size of the rear slot is designed according to the position of the front rod and the rear rod before the 1/4 and the last 1/4 of the optimal vibration mode, and the piezoelectric ceramic piece can be attached to the base The front rod and the rear rod are disposed on the upper side and the side surface of the rear rod, and the rotor, the elastic member and the abutting member are respectively disposed at the two ends of the base through the shaft; The ceramic piece is driven with the appropriate drive frequency, phase angle and voltage to drive the rotor to rotate. The ultrasonic drive system of claim 1, wherein the base is an I-shaped shape, and the front and rear bars are respectively provided with conical perforations. The ultrasonic drive system of claim 1, wherein the rotor is provided with an O-shaped friction ring, an annular groove, a cone and a through hole; the O-shaped friction ring can be sleeved on the annular groove . The ultrasonic drive system of claim 1, wherein the abutment member is provided with a screw hole, a through hole and a screw; The screw has a hexagonal blind hole. The ultrasonic drive system of claim 1, wherein the rotor is geared to drive other gears or gear sets to rotate.