Transduction device

Abstract

The invention relates to an energy conversion device which is used for being matched with a chopper for threading a lead, and the energy conversion device comprises a transmission mechanism which is used for installing the chopper; the transduction mechanism comprises a linear transduction assembly, a bent transduction assembly, a spacer, a mounting cover and a fastener, the spacer is located between the linear transduction assembly and the bent transduction assembly, the linear transduction assembly and the bent transduction assembly are located between the mounting cover and the transmission mechanism, and the fastener is arranged in the transduction mechanism in a penetrating mode and fixes the transduction mechanism to the transmission mechanism; when the linear transduction assembly and the bent transduction assembly are excited by voltages with the same frequency and different phases respectively, the linear transduction assembly can stretch out and draw back in a reciprocating mode in the axial direction of the transduction device so as to drive the transmission mechanism to generate axial vibration. The bent transduction assembly can generate reciprocating bending around a straight line perpendicular to the axial direction of the transduction device so as to drive the transmission mechanism to generate tangential vibration. Therefore, the bonding strength between the lead and the substrate or the chip is improved.

Description

Technical Field

[0001] The present application relates to the field of semiconductor technology, and in particular to a transducer device. Background Art

[0002] Wire bonding is widely used in the production process of semiconductor products. Wire bonding usually uses fine metal wires and uses a transducer to transmit ultrasonic vibration energy to the metal wires, so that the metal wires are tightly welded to the substrate, chip and other welding bodies through mutual diffusion between metal atoms, thereby achieving electrical interconnection between the chip and the substrate and information exchange between chips. However, for traditional transducers, it is easy to cause insufficient connection strength between the metal wires and the welding body, that is, there is a defect of poor metal wire bonding strength. Summary of the invention

[0003] A technical problem solved by the present application is how to improve the bonding strength of the lead wire.

[0004] A transducer device is used in conjunction with a wrecking cutter for threading a lead wire, the transducer device comprising:

[0005] A transmission mechanism for mounting the riving knife; and

[0006] The transducer mechanism comprises a linear transducer assembly, a curved transducer assembly, a spacer, a mounting cover and a fastener, wherein the spacer is located between the linear transducer assembly and the curved transducer assembly, the linear transducer assembly and the curved transducer assembly are located between the mounting cover and the transmission mechanism, and the fastener is passed through the transducer mechanism and fixes the transducer mechanism to the transmission mechanism;

[0007] Among them, when the linear transducer component and the bending transducer component are respectively excited by voltages with the same frequency and different phases, the linear transducer component can produce reciprocating expansion and contraction along the axial direction of the transducer device to drive the transmission mechanism to produce axial vibration, and the bending transducer component can produce reciprocating bending around a straight line perpendicular to the axial direction of the transducer device to drive the transmission mechanism to produce tangential vibration.

[0008] In one embodiment, the linear transducer assembly includes an even number of first piezoelectric ceramic sheets stacked on top of each other, and the polarization directions of any two adjacent first piezoelectric ceramic sheets are opposite.

[0009] In one embodiment, the linear transducer assembly further includes a first isolation plate, and the first isolation plate is located between two adjacent first piezoelectric ceramic plates.

[0010] In one embodiment, the bending transducer assembly includes an even number of second piezoelectric ceramic sheets, all of which are arranged to form a first group and a second group symmetrically arranged relative to the fastener, the number of second piezoelectric ceramic sheets in the first group and the second group is equal and corresponds one to one, the polarization directions of two second piezoelectric ceramic sheets symmetrical to each other in the first group and the second group are opposite, and the polarization directions of two second piezoelectric ceramic sheets adjacent to each other in the first group are opposite, and the polarization directions of two second piezoelectric ceramic sheets adjacent to each other in the second group are opposite, and the first group and the second group have opposite expansion and contraction transformation rules along the axial direction of the transducer device.

[0011] In one embodiment, the bending transducer assembly further includes a second isolation plate, wherein the second isolation plate is disposed between two adjacent second piezoelectric ceramic plates in the first group, and the second isolation plate is disposed between two adjacent second piezoelectric ceramic plates in the second group.

[0012] In one embodiment, a plurality of inclined grooves are provided on the outer peripheral surface of the transmission mechanism, the extending direction of the inclined grooves is arranged at an angle with the axial direction of the transmission mechanism, and the plurality of inclined grooves are arranged at intervals along the circumference of the transmission mechanism.

[0013] In one embodiment, the transmission mechanism includes a fixed cover, a first cylindrical section, a second cylindrical section, a conical section and a third cylindrical section which are arranged in sequence and coaxially along the axial direction, the third cylindrical section is used to install the riving knife, the fixed cover abuts against the transducer mechanism and is used to be fixed on a support member, the cross-sectional dimensions of the fixed cover, the first cylindrical section, the second cylindrical section, the conical section and the third cylindrical section decrease in sequence, and the cross-sectional dimension of the conical section gradually decreases along the direction from the second cylindrical section to the third cylindrical section.

[0014] In one of the embodiments, the transmission mechanism is provided with a mounting hole and an adjustment hole that are interconnected, the mounting hole is used to mount the splitting knife, and the adjustment hole is used to cooperate with a wrench. A connecting notch extending to opposite ends of the mounting hole exists at the connection between the adjustment hole and the mounting hole, and the size of the adjustment hole in the circumferential direction of the transmission mechanism gradually decreases along the direction from the mounting hole to the adjustment hole.

[0015] In one embodiment, an annular groove is formed on the surface of the transmission mechanism close to the transducer mechanism, the annular groove is arranged around the transducer mechanism, and the linear transducer component and the curved transducer component are spaced apart from the bottom wall of the annular groove.

[0016] In one embodiment, at least one of the following schemes is also included:

[0017] The surface roughness of the transmission mechanism is 0.5 μm to 1 μm;

[0018] The energy conversion mechanism further comprises an insulating sleeve, and the insulating sleeve is arranged on the fastener;

[0019] The spacer, the mounting cover, the fastener and the transmission mechanism are all made of the same material;

[0020] The linear transducer assembly is closer to the transmission mechanism than the curved transducer assembly;

[0021] The surface of the mounting cover facing the transmission mechanism has a roughness of 0.02 mm to 0.06 mm and a flatness of 0.003 mm to 0.007 mm.

[0022] A technical effect of an embodiment of the present application is: since the linear transducer assembly can generate expansion and contraction along the axial direction of the transducer device and drive the transmission mechanism to generate axial vibration, and the bending transducer assembly can generate bending around a straight line perpendicular to the axial direction of the transducer device and drive the transmission mechanism to generate tangential vibration, the transducer mechanism can drive the splitter and the lead to generate axial vibration and tangential vibration at the same time through the transmission mechanism. In the process of the splitter driving the lead to rub against the chip and the substrate to complete the bonding, it can ensure that the material of the substrate or chip is extruded in multiple directions to avoid the appearance of insufficient bonding surfaces, thereby improving the bonding strength between the lead and the substrate or chip. In addition, when the bonding speed increases, cracks and holes will not occur at the bonding point, thereby ensuring the bonding strength and the yield of semiconductor products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a transducer device provided in an embodiment.

[0024] Figure 2 for Figure 1 The three-dimensional structural schematic diagram of the energy conversion device shown in another viewing angle.

[0025] Figure 3 for Figure 1 A schematic diagram of a partial planar cross-sectional structure of the transducer device shown.

[0026] Figure 4 A schematic diagram of a partial planar cross-sectional structure of a transducer device provided in another embodiment.

[0027] Figure 5 for Figure 1 A schematic diagram of the partial exploded structure of the transducer device shown.

[0028] Figure 6 for Figure 1The diagrams show multiple planar structures formed when the transducer device is in different vibration modes.

[0029] Figure numerals: transducer device 10, chopper 20, transducer mechanism 100, linear transducer assembly 110, first piezoelectric ceramic sheet 111, bending transducer assembly 120, second piezoelectric ceramic sheet 121, first group 122, second group 123, spacer 130, mounting cover 140, fastener 150, transmission mechanism 200, fixing cover 240, fixing hole 241, annular groove 242, first cylindrical section 210, second cylindrical section 220, conical section 250, inclined groove 251, third cylindrical section 230, mounting hole 231, adjustment hole 232, connecting gap 233. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] See also Figure 1 , Figure 2 and Figure 3In one embodiment of the present application, a transducer device 10 is provided for use with a splitter 20, that is, the splitter 20 is installed on the transducer device 10, and the lead is inserted into the splitter 20, and the lead is used to be welded and connected with the substrate or chip through an ultrasonic welding process. The transducer device 10 includes a transmission mechanism 200 and a transducer mechanism 100, the splitter 20 is installed on the transmission mechanism 200, the transducer mechanism 100 includes a linear transducer component 110, a curved transducer component 120, a spacer 130, a mounting cover 140 and a fastener 150, the spacer 130 is located between the linear transducer component 110 and the curved transducer component 120, the linear transducer component 110 and the curved transducer component 120 are located between the mounting cover 140 and the transmission mechanism 200, and the fastener 150 is inserted into the transducer mechanism 100 and fixes the transducer mechanism 100 to the transmission mechanism 200. In other words, the fastener 150 is simultaneously inserted into the linear transducer assembly 110, the bending transducer assembly 120, the spacer 130 and the mounting cover 140, one end of the fastener 150 is in contact with the mounting cover 140, and the other end of the fastener 150 is connected to the transmission mechanism 200, and the mounting cover 140 is fixedly connected to the transmission mechanism 200 via the fastener 150, so that the linear transducer assembly 110, the bending transducer assembly 120 and the spacer 130 are sandwiched between the mounting cover 140 and the transmission mechanism 200.

[0037] When the linear transducer assembly 110 and the bending transducer assembly 120 are excited by voltages with the same frequency and different phases, the linear transducer assembly 110 can generate reciprocating expansion and contraction along the axial direction of the transducer device 10, that is, the linear transducer assembly 110 can generate high-frequency expansion and contraction motion along the axial direction, thereby driving the transmission mechanism 200 and the splitter 20 to generate axial vibrations, and then the splitter 20 drives the lead to generate high-frequency axial vibrations relative to the substrate or chip along the axial direction of the transducer device 10. The bending transducer assembly 120 can generate reciprocating bending around a straight line perpendicular to the axial direction of the transducer device 10, and the straight line perpendicular to the axial direction of the transducer device 10 is parallel to the axis of the splitter 20, thereby driving the transmission mechanism 200 and the splitter 20 to generate high-frequency vibrations along the axial direction perpendicular to the transducer device 10, which can be understood as tangential vibrations, and then the splitter 20 drives the lead to generate high-frequency tangential vibrations relative to the substrate or chip along the axial direction perpendicular to the transducer device 10. Therefore, the electrical energy loaded on the linear transducer component 110 and the bending transducer component 120 can be converted into mechanical vibrations that can drive the leads to generate axial vibrations and tangential vibrations. Under the action of the mechanical vibrations, the leads generate high-speed friction with the chip or substrate and generate heat, thereby welding (i.e., bonding) the leads to the chip or substrate, thereby achieving the transducer device 10 using an ultrasonic welding process to bond the leads.

[0038] If the transducer mechanism 100 can only drive the splitter 20 and the lead to generate a single axial vibration through the transmission mechanism 200, the material of the substrate or chip will be squeezed out in a single direction, causing an insufficient bonding surface, which will lead to insufficient bonding strength (i.e., connection strength) between the lead and the substrate or chip. Obviously, when the bonding strength is insufficient, the reliability and life of the bonding point between the lead and the substrate or chip will be affected. In addition, when the bonding speed increases, it is easy to cause undesirable phenomena such as cracks and holes at the bonding point, which also affects the bonding strength and even causes the semiconductor product to be scrapped.

[0039] As for the transducer device 10 in the above embodiment, since the transducer mechanism 100 can drive the splitter 20 and the lead to generate axial vibration through the transmission mechanism 200, and can also generate tangential vibration, thus realizing the diversification of vibration modes, in the process of the splitter 20 driving the lead to rub against the chip and the substrate to complete the bonding, it can ensure that the material of the substrate or chip is extruded in multiple directions to avoid the appearance of insufficient bonding surface, thereby improving the bonding strength (i.e., connection strength) between the lead and the substrate or chip. It can be understood that when the bonding strength is improved, the reliability and life of the bonding point between the lead and the substrate or chip will also be improved. In addition, when the bonding speed is increased, the bonding point will not produce undesirable phenomena such as cracks and holes, thereby ensuring the bonding strength and the yield of semiconductor products.

[0040] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, the linear transducer assembly 110 includes an even number of first piezoelectric ceramic sheets 111 stacked on each other, and the polarization directions of any two adjacent first piezoelectric ceramic sheets 111 are opposite, and the first piezoelectric ceramic sheets 111 can be circular. For example, when a sinusoidal current is passed through the linear transducer assembly 110, the linear transducer assembly 110 will generate periodic reciprocating telescopic motion along the axial direction of the transducer device 10, that is, the linear transducer assembly 110 can generate high-frequency telescopic motion along the axial direction. Obviously, when the linear transducer assembly 110 is extended, the axial length of the transducer mechanism 100 increases; when the linear transducer assembly 110 is contracted, the axial length of the transducer mechanism 100 decreases. Therefore, the axial vibration energy of the linear transducer assembly 110 will be transmitted to the chopper 20 and the lead through the transmission mechanism 200, and then the lead will generate high-frequency axial vibration relative to the substrate or chip, ensuring that the lead will generate high-speed friction relative to the substrate or chip along the axial direction of the transducer device 10 to form welding.

[0041] In some embodiments, the linear transducer assembly 110 further includes a first isolation plate, which is located between two adjacent first piezoelectric ceramic plates 111, and the first isolation plate can be made of stainless steel. By providing the first isolation plate, the energy conversion rate of the linear transducer assembly 110 can be improved, so that more electrical energy is converted into axial vibration energy of the linear transducer assembly 110. In other embodiments, the first isolation plate can be omitted.

[0042] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, the bending transducer assembly 120 includes an even number of second piezoelectric ceramic sheets 121, all of which are arranged to form a first group 122 and a second group 123, the first group 122 and the second group 123 are symmetrically arranged relative to the fastener 150, the number of second piezoelectric ceramic sheets 121 in the first group 122 and the second group 123 is equal and one-to-one corresponding, and the second piezoelectric ceramic sheets 121 can be semicircular. The polarization directions of the two second piezoelectric ceramic sheets 121 symmetrical to each other in the first group 122 and the second group 123 are opposite, the polarization directions of the two second piezoelectric ceramic sheets 121 adjacent to each other in the first group 122 are opposite, and the polarization directions of the two second piezoelectric ceramic sheets 121 adjacent to each other in the second group 123 are opposite. The expansion and contraction transformation rules of the first group 122 and the second group 123 along the axial direction of the transducer device 10 are opposite.

[0043] See also Figure 6 For example, when a sinusoidal current is passed through the bending transducer assembly 120, given that the first group 122 and the second group 123 have opposite expansion and contraction transformation rules along the axial direction of the transducer device 10, for example, when the first group 122 is extended, the second group 123 is contracted, so that the bending transducer assembly 120 is positively bent, that is, bent downward; when the first group 122 is contracted, the second group 123 is extended, so that the bending transducer assembly 120 is reversely bent, that is, bent upward. Obviously, in the positive bending and reverse bending states, the directions of the openings formed by the bending transducer assembly 120 are opposite. When the expansion and contraction transformation rules of the first group 122 and the second group 123 along the axial direction of the transducer device 10 are opposite, the bending transducer component 120 will generate periodic reciprocating bending motion around a straight line perpendicular to the axial direction of the transducer device 10, that is, the bending transducer component 120 will generate reciprocating bending motion around a straight line parallel to the axis of the chopper 20, and then the chopper 20 and the lead will be driven by the transmission mechanism 200 to generate high-frequency tangential vibration relative to the chip or substrate along the axial direction perpendicular to the transducer device 10, ensuring that the lead generates high-speed friction relative to the substrate or chip along the axial direction perpendicular to the transducer device 10 to form welding.

[0044] In some embodiments, the bending transducer assembly 120 further includes a second isolating sheet, a second isolating sheet is disposed between two adjacent second piezoelectric ceramic sheets 121 in the first group 122, and a second isolating sheet is disposed between two adjacent second piezoelectric ceramic sheets 121 in the second group 123, and the second isolating sheet may be made of stainless steel. By providing the second isolating sheet, the energy conversion rate of the bending transducer assembly 120 may be improved, so that more electrical energy is converted into the tangential vibration energy of the bending transducer assembly 120. In other embodiments, the second isolating sheet may be omitted.

[0045] The outer diameter of the first piezoelectric ceramic sheet 111 and the second piezoelectric ceramic sheet 121 may be about 13.5 mm, the diameter of the inner hole of the first piezoelectric ceramic sheet 111 and the second piezoelectric ceramic sheet 121 for inserting the fastener 150 may be about 5 mm, that is, the inner diameter is about 5 mm, and the thickness of the first piezoelectric ceramic sheet 111 and the second piezoelectric ceramic sheet 121 may be about 2.3 mm. The spacer 130 may be cylindrical, the outer diameter of the spacer 130 may be about 13.5 mm, and the inner diameter of the spacer 130 may be about 5 mm.

[0046] See also Figure 6 In the upper figure, when the linear transducer assembly 110 is powered on and the bending transducer assembly 120 is powered off, the linear transducer assembly 110 can be extended to the limit position; see Figure 6 In the right figure, when the linear transducer assembly 110 stops being energized and the bending transducer assembly 120 is energized, the first group 122 located on the upper side will be extended to the limit position, and the second group 123 located on the lower side will be contracted to the limit position, so that the bending transducer assembly 120 and the entire transducer mechanism 100 bend downward; see Figure 6 In the lower figure, when the linear transducer assembly 110 is powered on and the bending transducer assembly 120 is powered off, the linear transducer assembly 110 can be retracted to the limit position; see Figure 6 In the left figure, when the linear transducer assembly 110 stops being energized and the bending transducer assembly 120 is energized, the first group 122 located on the upper side will shrink to the limit position, and the second group 123 located on the lower side will stretch to the limit position, so that the bending transducer assembly 120 and the entire transducer mechanism 100 bend upward. Therefore, when the linear transducer assembly 110 and the bending transducer assembly 120 are simultaneously loaded with voltage excitations with the same frequency and different phases, the transmission mechanism 200 can drive the lead wire to roughly make an elliptical motion (such as Figure 6 The wire can generate axial vibration and tangential vibration, thus increasing the diversity of wire vibration and ultimately improving the bonding strength of the wire.

[0047] See also Figure 1 and Figure 4In some embodiments, the linear transducer assembly 110 is closer to the transmission mechanism 200 than the bending transducer assembly 120. For example, the linear transducer assembly 110 is sandwiched between the transmission mechanism 200 and the spacer 130, and the bending transducer assembly 120 is sandwiched between the mounting cover 140 and the spacer 130. That is, the mounting cover 140, the bending transducer assembly 120, the spacer 130, the linear transducer assembly 110 and the transmission mechanism 200 are arranged in sequence along the axial direction of the transducer device 10. Such an arrangement is more conducive to the transmission of the vibration energy generated by the transducer mechanism 100 to the riving knife 20 and the lead through the transmission mechanism 200, thereby improving the utilization rate of energy. In other embodiments, the bending transducer assembly 120 can be sandwiched between the transmission mechanism 200 and the spacer 130, and the linear transducer assembly 110 can be sandwiched between the mounting cover 140 and the spacer 130.

[0048] In some embodiments, the surface roughness of the transmission mechanism 200 is 0.5 μm to 1 μm, for example, the specific value of the surface roughness of the transmission mechanism 200 can be 0.5 μm, 0.8 μm or 1 μm, which can effectively reduce the loss of ultrasonic energy and the generation of parasitic modes, thereby further improving the energy utilization rate. The surface of the mounting cover 140 facing the transmission mechanism 200 is used to contact the bending transducer assembly 120, and the surface roughness of the mounting cover 140 facing the transmission mechanism 200 is 0.02 mm to 0.06 mm, and the flatness is 0.003 mm to 0.007 mm, for example, the specific value of the roughness of the surface can be 0.02 mm, 0.04 mm or 0.06 mm; the specific value of the flatness of the surface can be 0.003 mm, 0.005 mm or 0.007 mm. Through this setting, the friction between the bending transducer assembly 120 and the mounting cover 140 during bending can be reduced, thereby reducing the loss of vibration energy and further improving the energy utilization rate.

[0049] In some embodiments, the transducer mechanism 100 further includes an insulating sleeve, which is disposed on the fastener 150. The fastener 150 may be a bolt, etc. By arranging the insulating sleeve on the fastener 150, the energy utilization rate may also be improved. The spacer 130, the mounting cover 140, the fastener 150, the transmission mechanism 200, the first isolation sheet, and the second isolation sheet may all be made of the same material, so that the impact of assembly on the performance of the transducer device 10 can be reduced.

[0050] See also Figure 1 , Figure 2 and Figure 3In some embodiments, the transmission mechanism 200 includes a fixed cover 240, a first cylindrical section 210, a second cylindrical section 220, a conical section 250 and a third cylindrical section 230. The fixed cover 240, the first cylindrical section 210, the second cylindrical section 220, the conical section 250 and the third cylindrical section 230 are arranged in sequence along the axial direction and are coaxially arranged. The fixed cover 240 can be a plate-like structure of a roughly quadrangular prism, and a fixing hole 241 is provided on the fixed cover 240. Bolts can be passed through the fixing hole 241, so that the fixed cover 240 is fixed to the support member by bolts, thereby achieving the fixing of the entire transducer device 10 on the support member. The third cylindrical section 230 is used to install the splitter 20. The first cylindrical section 210, the second cylindrical section 220 and the third cylindrical section 230 can all be cylindrical, and the conical section 250 can be a truncated cone. The cross-sectional dimensions of the fixed cover 240, the first cylindrical section 210, the second cylindrical section 220, the tapered section 250 and the third cylindrical section 230 decrease in sequence, the cross-sectional dimension of the fixed cover 240 is the largest, and the cross-sectional dimension of the third cylindrical section 230 is the smallest. Along the axial direction of the transmission mechanism 200 from the second cylindrical section 220 to the third cylindrical section 230, the cross-sectional dimension of the tapered section 250 gradually decreases. By making this structural arrangement of the transmission mechanism 200, the loss of vibration energy of the transmission mechanism 200 can also be reduced, thereby improving the energy utilization of the wrecking knife 20 and the lead wire. The length of the second cylindrical section 220 can be about 18 mm, and the diameter can be about 7.5 mm. The length of the tapered section 250 can be about 30 mm, and the diameter of the smallest cross section of the tapered section 250 can be about 5 mm. The first cylindrical section 210, the second cylindrical section 220, the conical section 250 and the third cylindrical section 230 may be integrally formed and integrally connected, the fixing cover 240 and the first cylindrical section 210 may be separately provided, or the fixing cover 240 and the first cylindrical section 210 may be integrally formed and integrally connected.

[0051] See also Figure 1 , Figure 2 and Figure 3 In some embodiments, a ring groove 242 is formed on the surface of the fixed cover 240 near the transducer mechanism 100. The ring groove 242 can be arranged around the transducer mechanism 100. The linear transducer assembly 110 is arranged at a distance from the bottom wall of the ring groove 242. Since the bending transducer assembly 120 is farther away from the fixed cover 240 than the linear transducer assembly 110, the bending transducer assembly 120 is also arranged at a distance from the bottom wall of the ring groove 242. By providing the ring groove 242, the loss of vibration energy on the transmission mechanism 200 can be reduced, thereby improving the energy utilization rate.

[0052] See also Figure 1 , Figure 2 and Figure 3In some embodiments, the third cylindrical section 230 is provided with a mounting hole 231 and an adjustment hole 232. The mounting hole 231 may be a circular hole and the splitting knife 20 is mounted thereon, that is, the splitting knife 20 is inserted into the mounting hole 231. The adjustment hole 232 may also extend to the conical section 250. The adjustment hole 232 is used to cooperate with a wrench. A connecting notch 233 exists at the connecting point between the adjusting hole 232 and the mounting hole 231. The connecting notch 233 extends to opposite ends of the mounting hole 231 in the axial direction. That is, along the axial direction of the mounting hole 231, the length of the mounting hole 231 is equal to the length of the connecting notch 233. Of course, along the axial direction of the mounting hole 231, the length of the adjustment hole 232 is also equal to the length of the mounting hole 231. Therefore, both the adjustment hole 232 and the mounting hole 231 are through holes. Along the axial direction of the transmission mechanism 200, from the mounting hole 231 to the direction of the adjustment hole 232, the size of the adjustment hole 232 in the circumferential direction of the transmission mechanism 200 gradually decreases. It can be generally understood that the width of the adjustment hole 232 closer to the mounting hole 231 is larger, while the width of the adjustment hole 232 farther away from the mounting hole 231 is smaller.

[0053] During the installation of the splitting knife 20, the wrench can be matched with the adjustment hole 232, and the wrench can be rotated appropriately to increase the width of the communication gap 233, thereby increasing the diameter of the mounting hole 231, and then the splitting knife 20 is inserted into the mounting hole 231 with an increased diameter. Then, the wrench is taken out of the adjustment hole 232, and under the action of the elastic force of the transmission mechanism 200, the width of the communication gap is reduced, and the diameter of the mounting hole 231 is reduced, so that the splitting knife 20 and the mounting hole 231 with a reduced diameter form an interference fit relationship, that is, the interference connection between the splitting knife 20 and the transmission mechanism 200 is achieved, and finally the installation of the splitting knife 20 is achieved.

[0054] If the splitting knife 20 is fixed to the transmission mechanism 200 by screws, the transmission mechanism 200 will have inconsistent energy transmission efficiency due to the inconsistent locking force of the screws. At the same time, the installation procedure of the splitting knife 20 is complicated, and the assembly cost and manufacturing cost of the energy conversion device 10 are increased. The splitting knife 20 in the above embodiment is directly interference-fitted with the mounting hole 231, which can eliminate the defect of inconsistent locking force caused by the bolts, thereby ensuring the consistency of the energy transmission efficiency of the transmission mechanism 200. The installation of the bolts is also eliminated, thereby simplifying the assembly procedure and reducing the assembly cost and manufacturing cost of the energy conversion device 10.

[0055] See also Figure 1 , Figure 2 and Figure 3In some embodiments, a plurality of inclined grooves 251 are provided on the outer peripheral surface of the transmission mechanism 200, and the extending direction of the inclined grooves 251 is set at an angle with the axial direction of the transmission mechanism 200, and the plurality of inclined grooves 251 are arranged at intervals along the circumference of the transmission mechanism 200. The extending direction of the inclined grooves 251 can be set at an angle of 45° with the axial direction of the transmission mechanism 200. The inclined grooves 251 can be arranged on the conical section 250 of the transmission mechanism 200. By setting the inclined grooves 251, when the transmission mechanism 200 transmits the axial vibration, the axial vibration can be converted into a composite vibration mode of the axial vibration and the tangential vibration, thereby further improving the diversification of the vibration mode, and finally further improving the bonding strength of the lead wire. The width of the inclined groove 251 can be 1 mm to 3 mm, and the length of the inclined groove 251 can be 2 mm to 6 mm. For example, the specific value of the width of the inclined groove 251 can be 1 mm, 2 mm or 3 mm, etc.; the specific value of the length of the inclined groove 251 can be 2 mm, 4 mm or 6 mm, etc.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A transducer device for use with a wrecking knife for threading a lead, characterized in that: The ring energy device comprises: A transmission mechanism for mounting the riving knife; and The transducer mechanism comprises a linear transducer assembly, a curved transducer assembly, a spacer, a mounting cover and a fastener, wherein the spacer is located between the linear transducer assembly and the curved transducer assembly, the linear transducer assembly and the curved transducer assembly are located between the mounting cover and the transmission mechanism, and the fastener is passed through the transducer mechanism and fixes the transducer mechanism to the transmission mechanism; Among them, when the linear transducer component and the bending transducer component are respectively excited by voltages with the same frequency and different phases, the linear transducer component can produce reciprocating expansion and contraction along the axial direction of the transducer device to drive the transmission mechanism to produce axial vibration, and the bending transducer component can produce reciprocating bending around a straight line perpendicular to the axial direction of the transducer device to drive the transmission mechanism to produce tangential vibration.

2. The transducer device according to claim 1, characterized in that: The linear transducer assembly includes an even number of first piezoelectric ceramic sheets stacked on each other, and the polarization directions of any two adjacent first piezoelectric ceramic sheets are opposite.

3. The transducer device according to claim 2, characterized in that: The linear transducer assembly further includes a first isolation plate, and the first isolation plate is located between two adjacent first piezoelectric ceramic plates.

4. The transducer device according to claim 1, characterized in that: The bending transducer assembly includes an even number of second piezoelectric ceramic sheets, all of which are arranged to form a first group and a second group symmetrically arranged relative to the fastener, the number of second piezoelectric ceramic sheets in the first group and the second group is equal and one-to-one corresponding, the polarization directions of two second piezoelectric ceramic sheets symmetrical to each other in the first group and the second group are opposite, and the polarization directions of two second piezoelectric ceramic sheets adjacent to each other in the first group are opposite, and the polarization directions of two second piezoelectric ceramic sheets adjacent to each other in the second group are opposite, and the first group and the second group have opposite expansion and contraction transformation rules along the axial direction of the transducer device.

5. The transducer device according to claim 4, characterized in that: The bending transducer assembly further includes a second isolation plate, wherein the second isolation plate is disposed between two adjacent second piezoelectric ceramic plates in the first group, and the second isolation plate is disposed between two adjacent second piezoelectric ceramic plates in the second group.

6. The transducer device according to claim 1, characterized in that: A plurality of inclined grooves are provided on the outer peripheral surface of the transmission mechanism. The extending direction of the inclined grooves forms an angle with the axial direction of the transmission mechanism. The plurality of inclined grooves are spaced apart along the circumference of the transmission mechanism.

7. The transducer device according to claim 1, characterized in that: The transmission mechanism includes a fixed cover, a first cylindrical section, a second cylindrical section, a conical section and a third cylindrical section which are arranged in sequence and coaxially in the axial direction, the third cylindrical section is used to install the riving knife, the fixed cover abuts against the transducer mechanism and is used to be fixed on a support member, the cross-sectional dimensions of the fixed cover, the first cylindrical section, the second cylindrical section, the conical section and the third cylindrical section decrease in sequence, and the cross-sectional dimension of the conical section gradually decreases in the direction from the second cylindrical section to the third cylindrical section.

8. The energy conversion device according to claim 1, characterized in that: The transmission mechanism is provided with a mounting hole and an adjustment hole which are interconnected. The mounting hole is used to mount the splitting knife, and the adjustment hole is used to cooperate with a wrench. A connecting notch extending to opposite ends of the mounting hole exists at the connection between the adjustment hole and the mounting hole. Along the direction from the mounting hole to the adjustment hole, the size of the adjustment hole in the circumferential direction of the transmission mechanism gradually decreases.

9. The transducer device according to claim 1, characterized in that: An annular groove is formed on the surface of the transmission mechanism close to the transducer mechanism. The annular groove is arranged around the transducer mechanism, and the linear transducer component and the curved transducer component are spaced apart from the bottom wall of the annular groove.

10. The energy conversion device according to claim 1, characterized in that: Also includes at least one of the following options: The surface roughness of the transmission mechanism is 0.5 μm to 1 μm; The energy conversion mechanism further comprises an insulating sleeve, and the insulating sleeve is arranged on the fastener; The spacer, the mounting cover, the fastener and the transmission mechanism are all made of the same material; The linear transducer assembly is closer to the transmission mechanism than the curved transducer assembly; The surface of the mounting cover facing the transmission mechanism has a roughness of 0.02 mm to 0.06 mm and a flatness of 0.003 mm to 0.007 mm.

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