An ultrasonic knife clip structure and an ultrasonic transducer

Abstract

This invention provides an ultrasonic blade clamp structure and an ultrasonic transducer. The ultrasonic blade clamp structure includes a blade rod and a blade clamp. The end of the blade rod has a mounting hole with an opening, and a locking element is provided on one side of the mounting hole. The blade clamp includes a base and two clamping portions disposed on the base. One of the clamping portions has a recess on its side, and the end of the locking element extends into the recess to restrict the axial movement and circumferential rotation of the blade clamp relative to the mounting hole. Compared to the prior art, the ultrasonic blade clamp structure of this invention, through the design of the recess in the clamping portion, completely defines the position of the blade clamp in the blade rod, preventing the blade clamp and blade from shifting. The blade clamp adopts a force-relieving hole design, making the blade clamped more tightly, preventing the blade from being loosened by high-frequency oscillation. Moreover, the design of the clearance portion greatly reduces the contact area between the clamping portion and the blade, improving the pressure on the blade and the heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic transducer technology, specifically to an ultrasonic blade clamp structure and an ultrasonic transducer. Background Technology

[0002] An ultrasonic cutter is a special type of blade, far exceeding the complexity of conventional power tools. Its working principle involves using a boost circuit to supply high-voltage alternating current to a ceramic plate, achieving an oscillation speed of 40,000 times per second to cut objects. Its performance improvement depends not only on the ultrasonic transducer, but also on all structural features along the transmission path from the transducer to the blade, which significantly impact the final cutting result.

[0003] Traditional tool holder structures typically include a tool holder (a) and a tool shank (b). The tool holder (a) is inserted into the mounting hole of the tool shank (b) and tightened onto the surface of the tool holder (a) by a screw (d), thus clamping the tool holder (a) with the cutting blade (c). Because there is no axial restraint between the tool holder (a) and the tool shank (b) in the mounting hole, the tool shank (b) will collide with the tool holder (a) during high-frequency friction, causing frequency chaos and preventing effective resonance, leading to mechanism failure. At the same time, if the locking screw knob is not fully engaged, the tool holder (a) may become loose, move back and forth, or even fall off during operation. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies in the existing technology and to provide an ultrasonic knife clip structure and an ultrasonic transducer.

[0005] One embodiment of this utility model provides an ultrasonic knife clip structure, comprising:

[0006] A tool holder, wherein the end of the tool holder is provided with a mounting hole, the mounting hole having an opening, and a locking element is provided on one side of the mounting hole;

[0007] A blade holder includes a base portion and two clamping portions disposed on the base portion. The base portion and the clamping portions are mounted in a mounting hole. A portion of the clamping portions extends out of the opening of the mounting hole. A recess is formed on the side of one of the clamping portions. An end of a locking member extends into the recess to restrict the axial movement and circumferential rotation of the blade holder relative to the mounting hole. The end of the locking member presses one of the clamping portions against the other clamping portion so that the two clamping portions cooperate to clamp the blade.

[0008] In some alternative embodiments, the end of the locking member is tapered, and the shape of the recess matches the shape of the end of the locking member.

[0009] In some alternative embodiments, the locking element is a screw, the tool holder is provided with a threaded hole communicating with the mounting hole, the screw engages with the thread, and the end of the screw extends into the recess.

[0010] In some optional embodiments, the clamping part is further provided with a limiting groove extending axially along the mounting hole, the recess is located in the limiting groove, the end of the locking member can pass through the limiting groove and move into the recess, and can also disengage from the recess and move into the limiting groove to limit the axial movement stroke of the tool clamp in the mounting hole.

[0011] In some alternative embodiments, the clamping portion has an avoidance portion and two clamping surfaces located on both sides of the avoidance portion, and a clamping gap for clamping the blade is formed between the clamping surfaces of the two clamping portions, and an avoidance inner hole is formed around the avoidance portions of the two clamping portions.

[0012] In some optional embodiments, a force-relieving hole is also formed between the clamping surfaces of the two clamping portions. The force-relieving hole communicates with the clamping gap and is located at one end of the clamping portion near the base portion. The diameter of the force-relieving hole is larger than the width of the clamping gap, and the position of the recess corresponds to the position of the clamping gap.

[0013] In some alternative embodiments, the side of the clamping portion is formed with a protruding stepped portion that abuts against the end of the tool holder.

[0014] In some alternative embodiments, the stepped portion extends in a direction surrounding the mounting hole.

[0015] In some alternative embodiments, a clearance space is formed between the end of the base portion away from the orifice and the mounting hole.

[0016] Another embodiment of this utility model provides an ultrasonic transducer, including: an ultrasonic knife clip structure as described above.

[0017] Compared to existing technologies, the ultrasonic blade clamp structure of this invention, through the design of the recessed clamping part, completely defines the position of the blade clamp in the blade shank, preventing the blade clamp and blade from shifting. Furthermore, a limiting groove is added; when removing the blade, because the end of the locking member is still within the limiting groove, the blade clamp will not be pulled away from the mounting hole by the blade. In addition, the blade clamp employs a force-relieving hole design. Based on the lever principle, the internal pressure experienced by the clamping part during vibration is significantly greater than that of the base part, thus driving the blade clamp towards the mounting hole, thereby ensuring a tighter grip on the blade and preventing the blade from loosening due to high-frequency oscillation. Moreover, the design of the clearance part greatly reduces the contact area between the clamping part and the blade, increasing the pressure on the blade. This facilitates locking the blade while preventing mutual friction leading to resonance failure. The clearance part also increases the internal surface area of ​​the blade clamp, improving heat dissipation.

[0018] To provide a clearer understanding of this invention, the specific embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 A cross-sectional view of a conventional knife holder for the background technology;

[0020] Figure 2 This is a schematic diagram of the ultrasonic knife clip structure according to an embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the ultrasonic knife clip structure according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of an ultrasonic knife clamp structure according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the knife clip structure according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a locking component according to an embodiment of the present invention;

[0025] Figure 7 This is a cross-sectional view of a knife clip according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Tool holder; 11. Mounting hole; 12. Locking element; 13. Threaded hole; 14. Clearance space; 15. Ventilation hole; 20. Tool holder; 21. Base part; 22. Clamping part; 23. Recess; 24. Limiting groove; 25. Clearance part; 26. Clamping surface; 261. Clamping gap; 262. Force release hole; 27. Clearance inner hole; 28. Stepped part; 30. Blade. Detailed Implementation

[0028] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments thereof. Please refer to... Figures 2 to 5 One embodiment of this utility model provides an ultrasonic knife clamp structure, including: a knife bar 10 and a knife clamp 20.

[0029] The end of the tool holder 10 is provided with a mounting hole 11, which has an opening. A locking member 12 is provided on one side of the mounting hole 11. The tool holder 20 includes a base portion 21 and two clamping portions 22 provided on the base portion 21. The base and the clamping portions 22 are mounted in the mounting hole 11. Parts of the clamping portions 22 extend out from the opening of the mounting hole 11. A recess 23 is formed on the side of one of the clamping portions 22. The end of the locking member 12 extends into the recess 23 to restrict the axial movement and circumferential rotation of the tool holder 20 relative to the mounting hole 11.

[0030] After the end of the locking member 12 moves toward the mounting hole 11, it will extend into the recess 23. Then, by pressing against the inner wall of the recess 23, one of the clamping parts 22 will be pressed against the other clamping part 22, thereby causing the two clamping parts 22 to cooperate in clamping the blade 30 located between the two clamping parts 22. The end of the blade 30 abuts against the base part 21. It should be noted that the clamping part 22 pressed by the locking member 12 is the clamping part 22 with the recess 23.

[0031] Because of the limiting fit between the locking element 12 and the recess 23, the tool holder 20 is restricted in the axial and circumferential directions relative to the mounting hole 11, while the mounting hole 11 can restrict the tool holder 20 in the radial direction. Therefore, the tool holder 20 will not be displaced in the axial, circumferential and radial directions relative to the mounting hole 11, making the tool holder 20 stable and not easy to shake, and the blade 30 is stably locked.

[0032] Please see Figure 6 In some alternative embodiments, the end of the locking member 12 is tapered, and the shape of the recess 23 matches the shape of the end of the locking member 12. The tapered recess 23 can guide the locking member 12 into the recess 23, and can also improve the limiting stability of the locking member 12 on the clamping part 22.

[0033] The specific structure of the locking member 12 can be designed according to actual needs. For example, in some optional embodiments, the locking member 12 is a screw, and the shank 10 is provided with a threaded hole 13 that communicates with the mounting hole 11. The screw is engaged with the thread, and the end of the screw extends into the recess 23. The screw can move toward or away from the recess 23 by rotating relative to the threaded hole 13.

[0034] In some optional embodiments, the clamping part 22 is further provided with a limiting groove 24 extending axially along the mounting hole 11. The recess 23 is located in the limiting groove 24. The end of the locking member 12 can pass through the limiting groove 24 and move into the recess 23, thereby limiting the engagement with the recess 23. At this time, the locking member 12 will restrict the blade holder 20 from moving relative to the mounting hole 11. The locking member 12 can also disengage from the recess 23 and move into the limiting groove 24. Since the locking member 12 and the recess 23 are no longer limiting the engagement, and the locking member 12 will not press one clamping part 22 against the other clamping part 22, the blade 30 between the two clamping parts 22 can be removed. During the removal of the blade 30, there is still some contact between the blade 30 and the clamping part 22. The friction between the blade 30 and the clamping part 22 may cause the clamping part 22 to move. At this time, the end of the locking member 12 is still in the limiting groove 24. Although the blade clip 20 can move axially along the mounting hole 11, the axial movement of the blade clip 20 relative to the mounting hole 11 will be limited to the stroke range corresponding to the limiting groove 24. Therefore, the blade clip 20 cannot be taken out of the mounting hole 11. It should be noted that the limiting groove 24 and the end of the locking member 12 cooperate to restrict the blade clip 20 to still be able to move a certain distance towards the outside of the mounting hole 11, so that a large part of the clamping part 22 extends out of the mounting hole 11. This design is to facilitate the two clamping parts 22 to open a larger gap, thereby facilitating the removal of the blade 30 and the installation of the next blade 30.

[0035] Please see Figure 5 and Figure 7In some optional embodiments, the clamping portion 22 has a relief portion 25 and two clamping surfaces 26 located on both sides of the relief portion 25. A clamping gap 261 for clamping the blade 30 is formed between the clamping surfaces 26 of the two clamping portions 22. The relief portions 25 of the two clamping portions 22 form a relief inner hole 27 around them. When the two clamping portions 22 clamp the blade 30, they press against the surface of the blade 30 through the clamping surfaces 26. The relief portion 25 does not contact the blade 30, and part of the blade 30 is located in the relief inner hole 27. The design of the relief portion 25 helps to reduce the contact area between the clamping portion 22 and the blade 30. Under the same clamping force, the smaller the contact area, the greater the pressure. Therefore, reducing the contact area between the clamping portion 22 and the blade 30 can make the clamping portion 22 clamp the blade 30 more tightly, while also preventing mutual interference. Friction can lead to resonance failure. In addition, the clearance part 25 can slow down heat conduction, and air can carry away the heat inside the clearance inner hole 27 through the ventilation holes 15 on the blade holder to achieve heat dissipation. When the blade 30 is cutting at high frequency, friction with the object will generate a lot of heat energy. When cutting wood and other objects, the instantaneous temperature rises to more than 150°C. If it cannot be dissipated quickly, the high temperature will be conducted to the voltage ceramic and cause the transducer to fail. During cutting, air can be blown through the ventilation holes 15 and the clearance inner hole 27 to achieve rapid heat dissipation. Moreover, since the clearance part 25 reduces the contact area between the blade holder 20 and the blade 30, the heat will not be transferred to the blade holder 20 so quickly. This prevents the heat from being transferred in large quantities to the blade holder 10 through the blade holder 20 and then to other electronic components (voltage ceramic) and causing the transducer to fail.

[0036] In some optional embodiments, a force-relieving hole 262 is also formed between the clamping surfaces 26 of the two clamping portions 22. The force-relieving hole 262 communicates with the clamping gap 261 and is located at one end of the clamping portion 22 near the base portion 21. The diameter of the force-relieving hole 262 is larger than the width of the clamping gap 261. The position of the recess 23 is opposite to the position of the clamping gap 261, that is, the recess 23 is located on the side of the force-relieving hole 262 facing the opening. When the locking member 12 presses one of the clamping portions 22 against the other clamping portion 22 to achieve clamping and locking of the blade 30 by the two clamping portions 22, due to the design of the force-relieving hole 262, during high-frequency vibration, based on the lever principle, with the locking member 12 as the base... The deformation of the clamping part 22 on the side of the locking member 12 facing the mounting hole 11 is relatively small, while the deformation of the clamping part 22 on the side of the locking member 12 facing the force relief hole 262 is relatively large. This is because the design of the force relief hole 262 makes the lever arm of the clamping part 22 near the force relief hole 262 longer. Therefore, the deformation of the part of the clamping part 22 near the force relief hole 262 will be greater. Thus, during high-frequency vibration, the deformation of the part of the clamping part 22 near the force relief hole 262 will drive the clamping part 22 to move into the mounting hole 11, which helps to make the two clamping parts 22 clamp the blade 30 more tightly and also makes the blade clip 20 less likely to be loosened and fall out of the mounting hole 11.

[0037] In some alternative embodiments, the side of the clamping part 22 is formed with a protruding step part 28, which abuts against the end of the tool bar 10. The step part 28 restricts the position of the clamping part 22 relative to the mounting hole 11, thereby achieving a positioning effect. After the tool clip 20 is inserted into the mounting hole 11 to reach the designated mounting position, the step part 28 abuts against the end of the tool bar 10.

[0038] In some alternative embodiments, the step portion 28 extends in the direction surrounding the mounting hole 11, thereby increasing the contact area between the step portion 28 and the tool holder 10 and making the force on the step portion 28 and the tool holder 10 more stable.

[0039] In some alternative embodiments, a clearance space 14 is formed between the end of the base portion 21 away from the orifice and the mounting hole 11. After the blade holder 20 is inserted into the mounting hole 11 to reach the designated installation position, the step portion 28 abuts against the end of the blade shank 10. At this time, there is still a certain clearance space 14 between the base portion 21 and the inner wall of the end of the mounting hole 11. Therefore, the base portion 21 will not collide with the blade shank 10, thus preventing the problem of disrupting the ultrasonic resonance oscillation.

[0040] The ultrasonic knife clip structure described above can be applied to an ultrasonic transducer, which includes the ultrasonic knife clip structure described above.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic knife clamp structure, characterized in that, include: A tool holder, wherein the end of the tool holder is provided with a mounting hole, the mounting hole having an opening, and a locking element is provided on one side of the mounting hole; A blade holder includes a base portion and two clamping portions disposed on the base portion. The base portion and the clamping portions are mounted in a mounting hole. A portion of the clamping portions extends out of the opening of the mounting hole. A recess is formed on the side of one of the clamping portions. An end of a locking member extends into the recess to restrict the axial movement and circumferential rotation of the blade holder relative to the mounting hole. The end of the locking member presses one of the clamping portions against the other clamping portion so that the two clamping portions cooperate to clamp the blade.

2. The ultrasonic blade clamp structure of claim 1, wherein: The end of the locking member is tapered, and the shape of the recess matches the shape of the end of the locking member.

3. The ultrasonic blade clamp structure of claim 1, wherein: The locking element is a screw, and the tool holder is provided with a threaded hole that communicates with the mounting hole. The screw engages with the thread, and the end of the screw extends into the recess.

4. The ultrasonic knife clamp structure of claim 1, wherein: The clamping part is also provided with a limiting groove extending axially along the mounting hole. The recess is located in the limiting groove. The end of the locking member can pass through the limiting groove and move into the recess. It can also disengage from the recess and move into the limiting groove to limit the axial movement stroke of the tool clamp in the mounting hole.

5. An ultrasonic knife clamp structure according to any one of claims 1 to 4, characterized in that: The clamping part has an avoidance part and two clamping surfaces located on both sides of the avoidance part. A clamping gap for clamping the blade is formed between the clamping surfaces of the two clamping parts, and an avoidance inner hole is formed around the avoidance parts of the two clamping parts.

6. An ultrasonic knife clamp structure according to claim 5, characterized by: A force-relieving hole is also formed between the clamping surfaces of the two clamping parts. The force-relieving hole communicates with the clamping gap and is located at one end of the clamping part near the base part. The diameter of the force-relieving hole is larger than the width of the clamping gap, and the position of the pit corresponds to the position of the clamping gap.

7. An ultrasonic knife clamp structure according to any one of claims 1 to 4, characterized in that: The side of the clamping part has a protruding stepped portion, which abuts against the end of the tool holder.

8. The ultrasonic knife clamp structure of claim 7, wherein: The stepped portion extends in the direction surrounding the mounting hole.

9. The ultrasonic knife clamp structure of claim 7, wherein: A clearance space is formed between the end of the base portion away from the orifice and the mounting hole.

10. An ultrasonic transducer, characterized by, include: An ultrasonic knife clamp structure as described in any one of claims 1 to 9.

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