High-reliability quick-response piezoelectric clamp

Abstract

The utility model relates to the technical field of wire bonding machines, and discloses a high-reliability quick-response piezoelectric clamp which comprises a clamping jaw, a pre-tightening assembly, a piezoelectric amplification mechanism and a base. The clamping jaws comprise the first clamping jaw and the second clamping jaw which are oppositely arranged. The pre-tightening assembly is arranged between the first clamping jaw and the second clamping jaw in an abutting mode. The piezoelectric amplification mechanism comprises a first piezoelectric amplification mechanism connected with the first clamping jaw and a second piezoelectric amplification mechanism connected with the second clamping jaw. The base is arranged on the side, away from the clamping jaw, of the piezoelectric amplification mechanism. The base is connected with the first piezoelectric amplification mechanism and the second piezoelectric amplification mechanism. The first piezoelectric amplification mechanism and the second piezoelectric amplification mechanism simultaneously drive the first clamping jaw and the second clamping jaw to move in the opposite direction or the back-to-back direction, and the rapid clamping and loosening functions are achieved. The device has the advantages of being simple and compact in structure, large in displacement, high in response speed, high in accuracy and reliability and high in universality.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire bonding machines, and in particular relates to a piezoelectric clamp with high reliability and fast response. Background Art

[0002] Piezoelectric wire clamps are specially used to clamp metal leads such as gold wires and silver wires. The movement of the piezoelectric wire clamp is driven by piezoelectric ceramics. Through the design of flexible mechanical structure, the linear micro-displacement of the piezoelectric ceramics is amplified, so that the metal wire can be clamped. With the development of technology, the application of piezoelectric wire clamps is becoming more and more extensive. For example, it can be applied to the field of wire bonding machine technology. In the wire bonding process adopted by the wire bonding machine, a wire clamp for clamping the metal wire is generally set up for use with the wire bonding machine to keep the metal wire in a more ideal shape and improve the welding efficiency of the wire bonding machine. The piezoelectric wire clamps in the prior art have the problems of slow response speed, poor reliability, small stroke and poor versatility.

[0003] Based on the above, the problem to be solved at present is: to provide a high-reliability and fast-response piezoelectric clamp with fast response speed, high reliability, large stroke and good versatility. Utility Model Content

[0004] The utility model aims to provide a piezoelectric clamp with high reliability and fast response, aiming to solve the problems of slow response speed, poor reliability, small stroke and poor versatility of the piezoelectric clamp in the prior art.

[0005] The utility model is implemented as follows: a high-reliability and fast-response piezoelectric clamp comprises:

[0006] The clamping jaw comprises a first clamping jaw and a second clamping jaw which are arranged opposite to each other;

[0007] A pre-tightening assembly, disposed between the first clamping jaw and the second clamping jaw, and used for applying a pre-tightening force between the first clamping jaw and the second clamping jaw;

[0008] A piezoelectric amplifying mechanism, comprising a first piezoelectric amplifying mechanism connected to the first clamping jaw and a second piezoelectric amplifying mechanism connected to the second clamping jaw, wherein the first piezoelectric amplifying mechanism and the second piezoelectric amplifying mechanism drive the first clamping jaw and the second clamping jaw to move toward or away from each other;

[0009] The base is arranged on a side of the piezoelectric amplifying mechanism away from the clamping jaws, and the base is connected to the first piezoelectric amplifying mechanism and the second piezoelectric amplifying mechanism.

[0010] Furthermore, the first clamping jaw and the second clamping jaw are arranged in parallel with each other, the first piezoelectric amplifier mechanism and the second piezoelectric amplifier mechanism are arranged in parallel with each other, and the first clamping jaw, the first piezoelectric amplifier mechanism, the base, the second piezoelectric amplifier mechanism and the second clamping jaw form an open convex structure.

[0011] Furthermore, the first clamping jaw and the second clamping jaw are respectively provided with a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are arranged opposite to each other; the first clamping portion and the first clamping jaw are integrally formed or detachably connected; the second clamping portion and the second clamping jaw are integrally formed or detachably connected.

[0012] Furthermore, the first clamping portion and the first clamping jaw, and the second clamping portion and the second clamping jaw are connected by bolts and screw holes.

[0013] Furthermore, the first clamping portion and the second clamping portion are provided with arc-shaped grooves or rectangular grooves or planes that cooperate with each other to clamp the clamped object.

[0014] Furthermore, a wiring groove is provided in the base, the wiring groove is connected with the interior of the first piezoelectric amplifying mechanism and the second piezoelectric amplifying mechanism, and a first cover is provided on the wiring groove.

[0015] Furthermore, the base is also provided with a hollow sheath, which is communicated with the wiring groove, and the sheath is used for the internal power supply line to pass through and be electrically connected with an external mechanism.

[0016] Furthermore, the pre-tightening assembly includes a compression spring and a top screw, the two top screws are respectively fixed on the first clamping jaw and the second clamping jaw, and the compression spring is against between the two top screws.

[0017] Furthermore, the first piezoelectric amplifying mechanism and the second piezoelectric amplifying mechanism respectively include a first ceramic fixing end, a second ceramic fixing end, a piezoelectric ceramic, four flexible hinges, a first arc boss and a second arc boss;

[0018] The first ceramic fixed end, the first arc boss, the second ceramic fixed end and the second arc boss are connected in sequence to form a closed-loop cavity, the piezoelectric ceramic is arranged in the closed-loop cavity, and the two ends of the piezoelectric ceramic are respectively connected to the first ceramic fixed end and the second ceramic fixed end;

[0019] The first ceramic fixed end and one end of the first arc boss, the other end of the first arc boss and the second ceramic fixed end, the second ceramic fixed end and one end of the second arc boss, and the other end of the second arc boss and the first ceramic fixed end are respectively connected by flexible hinges; the first arc boss and the second arc boss are symmetrically arranged, and four flexible hinges are symmetrically arranged on both sides of the first arc boss and the second arc boss.

[0020] Furthermore, a second cover is provided at the bottom and the top of the closed-loop cavity respectively.

[0021] The utility model provides a high-reliability and fast-response piezoelectric clamp with the following beneficial effects:

[0022] 1. Two sets of piezoelectric amplification mechanisms (first piezoelectric amplification mechanism and second piezoelectric amplification mechanism) jointly drive the first clamping jaw and the second clamping jaw to move toward or away from each other, thereby realizing the functions of fast closing, clamping and releasing. The two sets of piezoelectric amplification mechanisms have larger displacement, faster response speed, higher accuracy and reliability than one set of piezoelectric amplification mechanisms in the prior art. A pre-tightening component is set between the first clamping jaw and the second clamping jaw, and when the piezoelectric is removed, the first clamping jaw and the second clamping jaw return to their initial positions faster under the action of the flexible hinge.

[0023] Second, the utility model sets an integrally formed or detachable first clamping part and second clamping part on the first clamping jaw and the second clamping jaw. When the first clamping part and second clamping part are detachable, the structure of the clamping surface of the first clamping part and second clamping part can be personalized, and the first clamping part and second clamping part that meet the use requirements can be replaced in different application scenarios, so that the clamping range of the utility model is larger and the versatility is wider.

[0024] 3. The first piezoelectric amplifying mechanism and the second piezoelectric amplifying mechanism of the utility model utilize the principle of the inverse piezoelectric effect and cooperate with the structural design of the piezoelectric amplifying mechanism. The two groups of piezoelectric amplifying mechanisms move in parallel with very high resolution, good linearity of movement, and compact structure, thereby achieving the characteristics of small size, high precision, small error, and fast transmission speed.

[0025] Fourth, the utility model as a whole has the advantages of simple structure, large displacement, fast response speed, high reliability, high resolution and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the piezoelectric clamp with high reliability and fast response provided by the utility model;

[0027] Figure 2 A top view of the high-reliability and fast-response piezoelectric clamp provided by the utility model without the first cover and the second cover installed;

[0028] Figure 3 The utility model provides Figure 2 A partial enlarged view of the high-reliability and fast-response piezoelectric clamp;

[0029] Figure 4 Schematic diagram of the explosion structure of the piezoelectric clamp with high reliability and fast response provided by the utility model;

[0030] Figure 5 A top view of the first clamping part, the second clamping part and the bolt combination provided by the utility model;

[0031] Figure 6A front view of the pre-tightening assembly provided by the utility model;

[0032] In the figure: 1-clamp; 11-first clamp; 12-second clamp; 2-preload assembly; 21-compression spring; 22-top screw; 3-piezoelectric amplifier; 31-first piezoelectric amplifier; 32-second piezoelectric amplifier; 301-first ceramic fixed end; 302-second ceramic fixed end; 303-piezoelectric ceramic; 304-flexible hinge; 305-first circular arc boss; 306-second circular arc boss; 4-base; 41-wiring groove; 5-first clamping part; 6-second clamping part; 7-bolt; 8-first cover; 9-sheath; 10-second cover. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0035] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] Reference Figure 1-6 As shown, it is a preferred embodiment provided by the utility model.

[0037] The high-reliability and fast-response piezoelectric clamp comprises a clamping jaw 1, a pre-tightening component 2, a piezoelectric amplifying mechanism 3 and a base 4, referring to Figure 1 The clamping jaw 1 comprises a first clamping jaw 11 and a second clamping jaw 12 which are arranged opposite to each other. Figure 2 The first clamping jaw 11 and the second clamping jaw 12 can be moved closer to each other or farther away from each other to achieve clamping. Preferably, the first clamping jaw 11 and the second clamping jaw 12 are arranged parallel to each other. A pre-tightening component 2 is arranged between the first clamping jaw 11 and the second clamping jaw 12, and the pre-tightening component 2 applies a pre-tightening force between the first clamping jaw 11 and the second clamping jaw 12 that can automatically return to the original position. Preferably, the pre-tightening component 2 includes a compression spring 21 and a top screw 22, referring to Figure 6The two top screws 22 are fixed on the first clamping jaw 11 and the second clamping jaw 12 respectively. The compression spring 21 is pressed between the two top screws 22. A pre-tightening assembly 2 is arranged between the first clamping jaw 11 and the second clamping jaw 12. When the piezoelectric force is removed, the first clamping jaw 11 and the second clamping jaw 12 return to the initial position faster.

[0038] The piezoelectric amplifier mechanism 3 includes a first piezoelectric amplifier mechanism 31 and a second piezoelectric amplifier mechanism 32. Figure 2 . The first piezoelectric amplifier mechanism 31 is connected to the first clamping jaw 11, and the second piezoelectric amplifier mechanism 32 is connected to the second clamping jaw 12. The first piezoelectric amplifier mechanism 31 and the second piezoelectric amplifier mechanism 32 are respectively connected to the outer side walls of the first clamping jaw 11 and the second clamping jaw 12 away from the preload assembly 2. Preferably, the first piezoelectric amplifier mechanism 31 and the second piezoelectric amplifier mechanism 32 are arranged in parallel and opposite to each other. The first piezoelectric amplifier mechanism 31 and the second piezoelectric amplifier mechanism 32 simultaneously drive the first clamping jaw 11 and the second clamping jaw 12 to move toward or away from each other, realizing the functions of rapid clamping and releasing, so that the utility model has large displacement, fast response speed, high accuracy and reliability.

[0039] The base 4 is arranged on the side of the piezoelectric amplifying mechanism 3 away from the clamping jaw 1, referring to Figure 4 . Both ends of the base 4 are connected to the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32, and are used to fix the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32. A wiring groove 41 is provided in the base 4, and the wiring groove 41 is connected to the inside of the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32. The base 4 is also provided with a hollow sheath 9. The sheath 9 is connected to the wiring groove 41. The power supply lines of the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32 can be electrically connected to an external mechanism through the wiring groove 41 and the sheath 9. A first cover 8 is provided on the wiring groove 41, which is used to seal the base 4.

[0040] Preferably, the first clamping jaw 11, the first piezoelectric amplifying mechanism 31, the base 4, the second piezoelectric amplifying mechanism 32 and the second clamping jaw 12 form a "convex" shaped structure with an open clamping end. The first clamping jaw 11, the first piezoelectric amplifying mechanism 31, the base 4, the second piezoelectric amplifying mechanism 32 and the second clamping jaw 12 can be integrally formed. The structure is simple and compact, with good linearity of movement, compact structure, small size, high precision and high stability.

[0041] The first clamping jaw 11 and the second clamping jaw 12 are also provided with a first clamping portion 5 and a second clamping portion 6, respectively. The first clamping portion 5 and the second clamping portion 6 are arranged opposite to each other, and the two move toward or away from each other under the drive of the first clamping jaw 11 and the second clamping jaw 12 to achieve clamping and releasing. The first clamping portion 5 is integrally formed with the first clamping jaw 11 or detachably connected. The second clamping portion 6 is integrally formed with the second clamping jaw 12 or detachably connected.

[0042] The first clamping portion 5 and the first clamping jaw 11, and the second clamping portion 6 and the second clamping jaw 12 are arranged to be detachably connected, for example, by means of a bolt 7 and a screw hole, Figure 5 The structures of the clamping surfaces of the first clamping portion 5 and the second clamping portion 6 can be personalized. For example, the first clamping portion 5 and the second clamping portion 6 are provided with arc-shaped grooves or rectangular grooves or planes that cooperate with each other for clamping. The first clamping portion 5 and the second clamping portion 6 that meet the requirements can be replaced in different application scenarios, so that the clamping range of the utility model is larger and the versatility is wider.

[0043] The first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32 respectively include a first ceramic fixing end 301, a second ceramic fixing end 302, a piezoelectric ceramic 303, four flexible hinges 304, a first arc boss 305 and a second arc boss 306. Figure 3 .

[0044] The first ceramic fixed end 301, the first arc boss 305, the second ceramic fixed end 302 and the second arc boss 306 are connected in sequence to form a closed-loop cavity. The piezoelectric ceramic 303 is disposed in the closed-loop cavity. Both ends of the piezoelectric ceramic 303 are connected to the first ceramic fixed end 301 and the second ceramic fixed end 302 respectively.

[0045] The first ceramic fixed end 301 and one end of the first arc boss 305, the other end of the first arc boss 305 and the second ceramic fixed end 302, the second ceramic fixed end 302 and one end of the second arc boss 306, and the other end of the second arc boss 306 and the first ceramic fixed end 301 are connected by flexible hinges 304. The first arc boss 305 and the second arc boss 306 are arranged symmetrically, and four flexible hinges 304 are arranged symmetrically on both sides of the first arc boss 305 and the second arc boss 306. The center line of the first ceramic fixed end 301 and the second ceramic fixed end 302 is arranged at an angle to the symmetry axis of the first clamp 11 and the second clamp 12. The bottom and top of the closed-loop cavity are respectively provided with a second cover 10, which is used to seal the piezoelectric ceramic 303 in the closed-loop cavity. The first piezoelectric amplifier mechanism 31 and the second piezoelectric amplifier mechanism 32 of the utility model utilize the principle of the inverse piezoelectric effect and cooperate with the main structure design. The parallel motion has very high resolution, good linearity and compact structure, thereby achieving the characteristics of small size, high precision, small error and fast transmission speed.

[0046] Working principle: By using the inverse piezoelectric effect, the piezoelectric ceramic 303 will produce deformation when voltage is applied, and the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32 can appropriately amplify and output the deformation of the piezoelectric ceramic 303. The first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32 drive the first clamping jaw 11 and the second clamping jaw 12 to move toward or away from each other, thereby controlling the closing and releasing of the first clamping part 5 and the second clamping part 6 to achieve the clamping function.

[0047] Specifically, when voltage is applied, the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32 move toward each other at the same time, and drive the first clamping jaw 11 and the second clamping jaw 12 to move toward each other, and the first clamping part 5 and the second clamping part 6 to move toward each other, thereby clamping the lead wire. The first clamping jaw 11 and the second clamping jaw 12 squeeze the preload assembly 2.

[0048] When the voltage is removed, the first piezoelectric amplifying mechanism 31 and the second piezoelectric amplifying mechanism 32 return to their initial state, that is, they move in opposite directions under the action of the flexible hinge 304, and drive the first clamping jaw 11 and the second clamping jaw 12 to move in opposite directions, and the first clamping part 5 and the second clamping part 6 to move in opposite directions, so as to loosen the lead wire. At the same time, the squeezed pre-tightening component 2 stretches rapidly, accelerating the first clamping jaw 11 and the second clamping jaw 12 to return to their initial positions.

[0049] This does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-reliability and fast-response piezoelectric clamp, characterized in that: include: A clamping jaw (1), comprising a first clamping jaw (11) and a second clamping jaw (12) arranged opposite to each other; A pre-tightening assembly (2), disposed between the first clamping jaw (11) and the second clamping jaw (12), and used to apply a pre-tightening force between the first clamping jaw (11) and the second clamping jaw (12); A piezoelectric amplifying mechanism (3), comprising a first piezoelectric amplifying mechanism (31) connected to the first clamping jaw (11) and a second piezoelectric amplifying mechanism (32) connected to the second clamping jaw (12), wherein the first piezoelectric amplifying mechanism (31) and the second piezoelectric amplifying mechanism (32) drive the first clamping jaw (11) and the second clamping jaw (12) to move toward or away from each other; A base (4) is arranged on a side of the piezoelectric amplifying mechanism (3) away from the clamping jaw (1), and the base (4) is connected to the first piezoelectric amplifying mechanism (31) and the second piezoelectric amplifying mechanism (32).

2. The high-reliability and fast-response piezoelectric clamp according to claim 1, characterized in that: The first clamping jaw (11) and the second clamping jaw (12) are arranged relatively parallel to each other, the first piezoelectric amplifying mechanism (31) and the second piezoelectric amplifying mechanism (32) are arranged relatively parallel to each other, and the first clamping jaw (11), the first piezoelectric amplifying mechanism (31), the base (4), the second piezoelectric amplifying mechanism (32) and the second clamping jaw (12) form an open convex structure.

3. The high-reliability and fast-response piezoelectric clamp according to claim 1, characterized in that: The first clamping jaw (11) and the second clamping jaw (12) are respectively provided with a first clamping portion (5) and a second clamping portion (6); the first clamping portion (5) and the second clamping portion (6) are arranged opposite to each other; the first clamping portion (5) and the first clamping jaw (11) are integrally formed or detachably connected; the second clamping portion (6) and the second clamping jaw (12) are integrally formed or detachably connected.

4. The high-reliability and fast-response piezoelectric clamp according to claim 3, characterized in that: The first clamping portion (5) and the first clamping jaw (11), as well as the second clamping portion (6) and the second clamping jaw (12), are connected by means of bolts (7) and screw holes.

5. The high-reliability and fast-response piezoelectric clamp according to claim 3, characterized in that: The first clamping portion (5) and the second clamping portion (6) are provided with arc-shaped grooves or rectangular grooves or planes which cooperate with each other and are used to clamp the clamped object.

6. The high-reliability and fast-response piezoelectric clamp according to claim 1, characterized in that: A wiring groove (41) is provided in the base (4), the wiring groove (41) is connected to the inside of the first piezoelectric amplifying mechanism (31) and the second piezoelectric amplifying mechanism (32), and a first cover (8) is provided on the wiring groove (41).

7. The high-reliability and fast-response piezoelectric clamp according to claim 6, characterized in that: The base (4) is further provided with a hollow sheath (9), the sheath (9) being in communication with the wiring groove (41), and the sheath (9) is used for the internal power supply line to pass through and be electrically connected to an external mechanism.

8. The high-reliability and fast-response piezoelectric clamp according to claim 1, characterized in that: The pre-tightening assembly (2) comprises a compression spring (21) and a top screw (22), wherein the two top screws (22) are respectively fixed to the first clamping jaw (11) and the second clamping jaw (12), and the compression spring (21) is abutted between the two top screws (22).

9. The high-reliability and fast-response piezoelectric clamp according to claim 1, characterized in that: The first piezoelectric amplifying mechanism (31) and the second piezoelectric amplifying mechanism (32) respectively comprise a first ceramic fixing end (301), a second ceramic fixing end (302), a piezoelectric ceramic (303), four flexible hinges (304), a first circular arc boss (305) and a second circular arc boss (306); The first ceramic fixed end (301), the first arc boss (305), the second ceramic fixed end (302) and the second arc boss (306) are connected in sequence to form a closed-loop cavity, the piezoelectric ceramic (303) is arranged in the closed-loop cavity, and the two ends of the piezoelectric ceramic (303) are respectively connected to the first ceramic fixed end (301) and the second ceramic fixed end (302); The first ceramic fixed end (301) and one end of the first circular arc boss (305), the other end of the first circular arc boss (305) and the second ceramic fixed end (302), the second ceramic fixed end (302) and one end of the second circular arc boss (306), and the other end of the second circular arc boss (306) and the first ceramic fixed end (301) are respectively connected via flexible hinges (304); the first circular arc boss (305) and the second circular arc boss (306) are symmetrically arranged, and four flexible hinges (304) are symmetrically arranged on both sides of the first circular arc boss (305) and the second circular arc boss (306).

10. The high-reliability and fast-response piezoelectric clamp according to claim 9, characterized in that: A second sealing cover (10) is respectively provided at the bottom and the top of the closed-loop cavity.

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