Ultrasonic vibrator

Abstract

The ultrasonic vibrator comprises a rear cover plate, an even number of conductive copper sheets, an even number of piezoelectric ceramics, a front cover plate, an amplitude-change pole and a connecting screw rod, connecting threaded holes are formed in the centers of the upper sections of the rear cover plate, the front cover plate and the amplitude-change pole, a nut is arranged at the top of the connecting screw rod, and screw rod connecting external threads are arranged at the front end of the connecting screw rod. The connecting screw rod sequentially penetrates through the connecting threaded holes of the rear cover plate and the front cover plate from top to bottom, downwards extends into the connecting threaded hole of the amplitude-change pole and is in threaded fastening connection with the connecting internal thread through the screw rod connecting external thread; the conductive copper sheets and the piezoelectric ceramics are alternately distributed and arranged on the connecting screw rod in a penetrating manner and are clamped between the rear cover plate and the front cover plate; the front cover plate, the rear cover plate and the amplitude-change pole are all fixedly connected through one screw, the front cover plate metal piece is not prone to breakage during ultrasonic (sound) wave high-speed vibration, the service life is long, the using effect is good, the using cost is low, the using requirement is effectively met, and the industrial pain and difficulty that the front cover plate cracks when metal is aged due to ultrasonic vibration is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of ultrasonic waves, and particularly relates to an ultrasonic vibrator with good use effect, not easy to be damaged, long service life and low use cost. Background Art

[0002] The vibrator is the most important functional component in ultrasonic (also called ultrasound) welding. The principle of ultrasonic welding is that the circuit generates high-frequency ultrasonic vibrations when the piezoelectric ceramic is energized and pressurized. The high-speed vibrations are transmitted from the piezoelectric ceramic to the horn, then from the horn to the mold, and finally to the workpiece to be welded, thus achieving ultrasonic welding. The vibrator mainly includes a rear cover plate, a front cover plate, and a horn. Currently, its connection is completed in sections using two screws. The rear cover plate is connected to the front cover plate with one screw, and the front cover plate is connected to the horn plate with another screw. The two screws have a section at the center of the front cover plate. This structure using two screws connected with a section between the two screws can meet certain usage requirements, but it also has a major drawback. When the front cover plate is subjected to high-speed ultrasonic (sound) vibrations, the metal aging fatigue fracture at the section where the two screws are disconnected is prone to occur. The metal of the front cover plate is easily damaged and cracked, resulting in a short product lifespan, inconvenience, high cost, and failure to meet usage requirements. This has been a pain point and difficulty in the entire industry and has long been difficult to overcome. Based on this, the present application was created.

[0003] The technical problem to be solved by the utility model is to provide an ultrasonic vibrator with a front cover that is not easy to break, has a long service life, good use effect, low use cost, and effectively meets use requirements. Utility Model Content

[0004] In order to solve the problems of the above-mentioned prior art front cover plate, such as the breakage of the two screws when vibrating at high speed by ultrasonic (sound) waves, the front cover plate is easily damaged, the product has a short service life, is inconvenient to use, has high cost, and cannot meet the requirements of use, the present utility model adopts the following technical solutions:

[0005] The utility model provides an ultrasonic vibrator, comprising a rear cover plate, an even number of conductive copper sheets, an even number of piezoelectric ceramics, a front cover plate, an amplitude transformer and a connecting screw, wherein the rear cover plate, the front cover plate and the upper section of the amplitude transformer are all provided with a connecting threaded hole at the center, the top of the connecting screw is provided with a nut, and the front end is provided with a screw rod connecting external thread, the screw rod connecting external thread is completely matched with the connecting internal thread in the connecting thread hole, the rear cover plate, the conductive copper sheet, the piezoelectric ceramics, the front cover plate and the amplitude transformer are distributed from top to bottom, the connecting screw passes through the connecting thread holes of the rear cover plate and the front cover plate in sequence from top to bottom and extends downward into the connecting thread hole of the amplitude transformer and is threadably fastened by the screw rod connecting external thread and the connecting internal thread, the conductive copper sheet and the piezoelectric ceramics are alternately distributed and passed through the connecting screw and clamped between the rear cover plate and the front cover plate.

[0006] Preferably, the number of the conductive copper sheets is equal to that of the piezoelectric ceramics.

[0007] The beneficial effects of the present invention are that the front and rear cover plates and the amplitude rod are all fastened together by a screw, and the metal of the front cover plate is not easy to age and break when the ultrasonic (sound) wave vibrates at high speed. It has a long service life, good use effect, low use cost, and effectively meets the use requirements. It effectively solves the industry pain points and difficulties of ultrasonic vibration metal aging and cracking of the front cover plate, and leads the development of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0009] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0010] See also Figure 1 , an ultrasonic vibrator, including a rear cover plate 1, an even number of conductive copper sheets 2, an even number of piezoelectric ceramics 3, a front cover plate 4, an amplitude transformer 5 and a connecting screw 6, wherein the rear cover plate 1, the front cover plate 4 and the upper section of the amplitude transformer 5 are all provided with a connecting threaded hole at the center, the top of the connecting screw 6 is provided with a nut 61, and the front end is provided with a screw rod connecting external thread, the screw rod connecting external thread is completely matched with the connecting internal thread in the connecting thread hole, the rear cover plate 1, the conductive copper sheet 2, the piezoelectric ceramics 3, the front cover plate 4 and the amplitude transformer 5 are distributed from top to bottom, and the connecting screw 6 is arranged from top to bottom It passes through the connecting threaded holes of the rear cover plate 1 and the front cover plate 4 in sequence and extends downward to the connecting threaded hole of the amplitude transformer 5 and is fastened by connecting the external thread and the connecting internal thread through the screw rod. The conductive copper sheet 2 and the piezoelectric ceramic 3 are alternately distributed and passed through the connecting screw rod and clamped between the rear cover plate 1 and the front cover plate 4. In this way, all the components can be fastened together by one screw rod. When one screw rod is tightened, there will be no disconnection gap in the middle. Even during the high-speed vibration of ultrasonic (sound) waves, metal aging and fracture are not likely to occur. The use effect is good and the use is more convenient.

[0011] The number of the conductive copper sheets 2 and the piezoelectric ceramics 3 is equal. Figure 1 There are four in the figure. The specific number can be determined according to actual needs and is not limited here. An even number is a common usage scenario.

[0012] The beneficial effects of the present invention are that the front and rear cover plates and the amplitude rod are all fastened together by a screw, and the metal of the front cover plate is not easy to age and break when the ultrasonic (sound) wave vibrates at high speed. It has a long service life, good use effect, low use cost, and effectively meets the use requirements. It effectively solves the industry pain points and difficulties of ultrasonic vibration metal aging and cracking of the front cover plate, and leads the development of the industry.

[0013] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An ultrasonic vibrator, characterized in that: The invention comprises a rear cover plate (1), an even number of conductive copper sheets (2), an even number of piezoelectric ceramics (3), a front cover plate (4), an amplitude change rod (5) and a connecting screw rod (6), wherein the centers of the upper sections of the rear cover plate (1), the front cover plate (4) and the amplitude change rod (5) are all provided with connecting threaded holes, the top of the connecting screw rod (6) is provided with a nut (61), and the front end is provided with a screw rod connecting external thread, the screw rod connecting external thread is completely matched with the connecting internal thread in the connecting threaded hole, the rear cover plate (1), the conductive copper sheets (2), piezoelectric ceramics (3), front cover plate (4), and amplitude transformer (5) are distributed from top to bottom, and the connecting screw (6) passes through the connecting threaded holes of the rear cover plate (1) and the front cover plate (4) from top to bottom in sequence and extends downward into the connecting threaded hole of the amplitude transformer (5) and is fastened by connecting the external thread of the screw and the connecting internal thread through the screw rod. The conductive copper sheet (2) and piezoelectric ceramics (3) are alternately distributed and passed through the connecting screw (6) and clamped between the rear cover plate (1) and the front cover plate (4).

2. The ultrasonic vibrator according to claim 1, wherein: The number of the conductive copper sheets (2) and the number of the piezoelectric ceramics (3) are equal.

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