Ultrasonic amplitude transformer, ultrasonic transducer and ultrasonic cutter

Abstract

A first amplitude-change pole body and a second amplitude-change pole body are coaxially arranged, the projection of the second amplitude-change pole body along the central axis of the second amplitude-change pole body is located in the first amplitude-change pole body, and a containing cavity is formed in the end, away from the first amplitude-change pole body, of the second amplitude-change pole body. The positioning rod body is arranged at the end, away from the second amplitude-change rod body, of the first amplitude-change rod body and is coaxial with the first amplitude-change rod body, the flange structure is arranged on the side wall of the first amplitude-change rod body, and a gap is formed between the flange structure and the side wall of the second amplitude-change rod body. The adjusting block extends into the gap, at least part of the adjusting block is connected to the end, close to the second amplitude-change pole body, of the first amplitude-change pole body, and the adjusting block abuts against part of the side wall of the second amplitude-change pole body. The adjusting block can enable vibration to act on the second amplitude-change pole body to enable the second amplitude-change pole body to achieve polarization, the bending vibration effect is achieved through the combined action of longitudinal vibration and polarization, and motion of a cutter is better facilitated.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic cutting tool device technology, and in particular to ultrasonic amplitude transformers, ultrasonic transducers and ultrasonic cutting tools. Background Technology

[0002] The ultrasonic amplitude transformer is an important component of an ultrasonic vibration system. Its main function is to transmit ultrasonic vibrations and change the amplitude of the ultrasonic vibrations. Conventional ultrasonic longitudinal vibration excitation devices mostly operate in longitudinal vibration mode, which is inconvenient to directly connect and drive bending vibration tools, making it difficult to achieve bending vibration operation.

[0003] In the prior art, such as the longitudinal-bending composite rotating ultrasonic vibration irregular amplitude rod with application number 202411929647.2, the dynamic balance vibration section includes a bending vibrator structure and a longitudinal vibrator structure with different cross-sectional areas. The bending vibrator structure and the longitudinal vibrator structure have equal mass, and the centroids of the bending vibrator structure and the longitudinal vibrator structure are symmetrically arranged about the axis of rotation of the amplitude rod. However, its structural design is relatively complex, and the bending vibration degree is singular. Utility Model Content

[0004] The purpose of this invention is to provide an ultrasonic amplitude transformer, an ultrasonic transducer, and an ultrasonic cutting tool. The top of the adjustment block of the ultrasonic amplitude transformer is at least partially in contact with the first amplitude transformer body, and the side wall is in contact with the second amplitude transformer body. This allows vibration to be applied to the second amplitude transformer body, causing it to be polarized. The bending vibration effect is achieved through the combined action of longitudinal vibration and polarization, which is more conducive to the cutting tool's movement.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an ultrasonic amplitude transformer, comprising:

[0006] The first and second amplitude transformers are connected and coaxially arranged. The projection of the second amplitude transformer along its central axis lies within the first amplitude transformer, and a receiving cavity is provided at the end of the second amplitude transformer away from the first amplitude transformer.

[0007] A positioning rod is disposed on the first luffing rod at one end away from the second luffing rod, and is coaxially arranged with the first luffing rod.

[0008] A flange structure is provided on the side wall of the first amplitude transformer body, and has a gap between it and the side wall of the second amplitude transformer body.

[0009] An adjusting block extends into the gap and is at least partially connected to the first amplitude rod near one end of the second amplitude rod, and abuts against a portion of the side wall of the second amplitude rod.

[0010] As a further optimization, the first amplitude rod, the second amplitude rod, the positioning rod, and the adjusting block are integrally formed.

[0011] As a further optimization, the first amplitude rod or flange structure is symmetrically provided with axially penetrating mounting holes, and the adjusting block is provided with locking holes. The adjusting block is locked by bolts that pass through one of the mounting holes and extend into the locking holes.

[0012] As a further optimization, the mounting hole is a countersunk hole structure, which prevents the upper end of the bolt from protruding from the end face of the first amplitude transformer, facilitating the assembly of the piezoelectric ceramic.

[0013] As a further optimization, the adjusting block has a symmetrical structure, and the vertical distance between its sidewall and the second amplitude rod gradually decreases from top to bottom; the projection of the contact surface between the adjusting block and the second amplitude rod along the central axis of the second amplitude rod is less than a semicircular arc and greater than one-fifth of a circular arc.

[0014] As a further optimization, the lower end of the adjusting block is flush with the lower surface; the position of the lower end of the adjusting block is higher than the lower end of the second amplitude rod.

[0015] This utility model also provides an ultrasonic transducer, including a piezoelectric ceramic and the aforementioned ultrasonic amplitude transformer, wherein the piezoelectric ceramic is sleeved on the positioning rod and abuts against the end of the first amplitude transformer that is away from the second amplitude transformer.

[0016] This utility model also provides an ultrasonic cutting tool, including a handle, a cutting tool, and the aforementioned ultrasonic transducer. One end of the ultrasonic transducer extends into the inner cavity of the handle, the flange structure is connected to the handle, and the cutting tool is disposed in the receiving cavity.

[0017] As a further optimization, a positioning groove is provided on the inner wall of the tool holder near the opening of the inner cavity, and the flange structure is fixedly connected to the positioning groove.

[0018] As a further optimization, an annular groove is formed between the flange structure and the tool holder, and a sealing ring is provided in the annular groove to improve the sealing performance.

[0019] Compared with the prior art, the present invention has the following beneficial effects: Based on the longitudinal transmission of vibration by the first and second amplitude rods, the top of the adjusting block at least partially abuts against the first amplitude rod and the side wall abuts against the second amplitude rod, so that the vibration can be applied to the second amplitude rod to achieve polarization. The bending vibration effect is achieved through the combined action of longitudinal vibration and polarization, which is more conducive to the operation of the cutting tool. Attached Figure Description

[0020] Figure 1 This is a structural diagram of one embodiment of the ultrasonic amplitude transformer of this utility model.

[0021] Figure 2 This is a cross-sectional view of one embodiment of the ultrasonic amplitude transformer of this utility model.

[0022] Figure 3 This is an exploded view of another embodiment of the ultrasonic amplitude transformer of this utility model.

[0023] Figure 4 This is a cross-sectional view of another embodiment of the ultrasonic amplitude transformer of this utility model.

[0024] Figure 5 This is a structural diagram of the ultrasonic transducer of this utility model.

[0025] Figure 6 This is a cross-sectional view of the ultrasonic cutting tool of this utility model.

[0026] Figure 7 This is a schematic diagram of the flange structure installed in the inner cavity in another embodiment of the ultrasonic cutting tool of this utility model. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figure 1 and Figure 2 As shown, an ultrasonic amplitude transformer includes a first amplitude transformer body 11, a second amplitude transformer body 12, a positioning rod body 13, an adjusting block 14, and a flange structure 15. The first amplitude transformer body 11 and the second amplitude transformer body 12 are connected, both of which are cylindrical structures and coaxially arranged. The projection of the second amplitude transformer body 12 along its central axis is located inside the first amplitude transformer body 11, and a receiving cavity 100 is provided at one end away from the first amplitude transformer body 11. The positioning rod body 13 is disposed on the first amplitude transformer body 11 at one end away from the second amplitude transformer body 12 and is coaxially arranged with the first amplitude transformer body 11. The flange structure 15 is disposed on the side wall of the first amplitude transformer body 11 and has a gap 1a between it and the side wall of the second amplitude transformer body 12. The adjusting block 14 extends into the gap 1a and is at least partially connected to the end of the first amplitude transformer body 11 near the second amplitude transformer body 12, and abuts against a portion of the side wall of the second amplitude transformer body 12.

[0029] In this invention, piezoelectric ceramics and other components are mounted on the positioning rod 13 to form an ultrasonic transducer. After connecting the cutting tool through the receiving cavity 100 and the tool holder through the flange structure 15, the first amplitude transformer 11 and the second amplitude transformer 12 are used to transmit longitudinal vibration. Due to the asymmetry of the two sides of the second amplitude transformer 12 (one side has a protrusion that abuts against the adjusting block 14 of the first and second amplitude transformers 11), the vibration state on both sides will differ, allowing the cutting tool to form a certain degree of polarization, i.e., forming bending vibration together with the longitudinal vibration, which is more conducive to the tool's machining action. The top of the adjusting block 14 at least partially abuts against the first amplitude transformer 11, and its side wall abuts against the second amplitude transformer 12, allowing the vibration transmitted through the first amplitude transformer 11 to act on the side of the second amplitude transformer 12, thereby effectively achieving polarization of the second amplitude transformer 12 based on the longitudinal vibration.

[0030] In one embodiment of this utility model, the first amplitude rod 11, the second amplitude rod 12, the positioning rod 13 and the adjusting block 14 are integrally formed structures, and the flange structure 15 can also be integrally formed with the above structures.

[0031] like Figure 3 and Figure 4 As shown, the first amplitude rod 11 has symmetrical mounting holes 110 on opposite sides of the positioning rod 13, which penetrate the main body axially. The adjusting block 14 has a locking hole 140. The adjusting block 14 is locked by a bolt that passes through one of the mounting holes 110 and extends into the locking hole 140. The other mounting hole 110 is not used. The adjusting block 14 abuts against the side wall of the second amplitude rod 12 through the arc structure. After the locking hole 140 is connected to the mounting hole 110, a bolt is inserted from the other side of the mounting hole 110 to lock and position the adjusting block 14. Preferably, the locking hole 140 is inclined to the mounting hole 110. In addition to installing the adjusting block 14 at the lower end of the first amplitude rod 11, the inclined locking action of the bolt can also make the side wall of the adjusting block 14 fit more closely to the side wall of the second amplitude rod 12, which is beneficial to achieving bending vibration. In addition, the mounting hole 110 is a countersunk hole structure, and the upper end of the bolt is embedded in it and does not protrude from the upper end face of the first amplitude rod 11, so as not to affect the assembly of the piezoelectric ceramic and the overall vibration effect of the first amplitude rod 11.

[0032] The detachable design of the adjustment block 14 facilitates the functional adjustment of the ultrasonic amplitude transformer. Even without the adjustment block 14, the symmetrical structure with two mounting holes 110 still allows for longitudinal transmission of vibration. Furthermore, different sizes (with different contact surfaces than the second amplitude transformer 12) and different masses of adjustment blocks 14 can also help achieve different degrees of bending vibration.

[0033] Specifically, the adjusting block 14 has a symmetrical structure, and the vertical distance between its sidewall and the second amplitude rod 12 gradually decreases from top to bottom. The projection of the contact surface between the adjusting block 14 and the second amplitude rod 12 along the central axis of the second amplitude rod 12 is less than a semicircular arc and greater than one-fifth of a circular arc, thus forming a protruding structure that exists only on one side.

[0034] In addition, the lower end of the adjusting block 14 is flush with the lower end, and the position of the lower end of the adjusting block 14 is higher than the lower end of the second amplitude rod 12.

[0035] Furthermore, to ensure accurate and stable positioning of the adjusting block 14, longitudinal ribs can be provided on the side wall of the second amplitude transformer 12. For example, four ribs can be symmetrically arranged to divide the side wall of the second amplitude transformer 12 into four positioning areas. The vertical projection of a pair of mounting holes 110 is located in two non-adjacent positioning areas. In this way, the ultrasonic amplitude transformer is still symmetrical in structure. The adjusting block 14 is placed in one positioning area and abuts against two adjacent ribs. Then, the precise and stable installation of the adjusting block 14 is achieved by the cooperation of the mounting hole 110 located above the positioning area, the locking hole 140 on the adjusting block 14, and the bolt.

[0036] Based on the above settings, such as Figure 5 As shown, this utility model also provides an ultrasonic transducer, including a piezoelectric ceramic 20 and the aforementioned ultrasonic amplitude transformer. The piezoelectric ceramic 20 is sleeved on the positioning rod 13 and abuts against the end of the first amplitude transformer 11 that is away from the second amplitude transformer 12.

[0037] Based on the above settings, such as Figure 6 As shown, this utility model also provides an ultrasonic cutting tool, including a handle 30, a cutting tool 40, and the aforementioned ultrasonic transducer. One end of the ultrasonic transducer extends into the inner cavity 300 of the handle 30, i.e., the piezoelectric ceramic 20 and other components are located in the inner cavity 300. The flange structure 15 is connected to the handle 30. The cutting tool 40 is disposed in the receiving cavity 100. The cutting tool 40 can be fixed to the ultrasonic amplitude transformer by bolts, or ER chucks and ER nuts and other connection structures.

[0038] Furthermore, a positioning groove 301 is provided on the inner wall of the tool holder 30 near the opening of the inner cavity 300, and the flange structure 15 is fixedly connected in the positioning groove 301 to achieve a sealed connection.

[0039] like Figure 7 As shown, in another embodiment, an annular groove 302 is formed between the flange structure 15 and the tool holder 30. Specifically, an annular groove 302 is opened on the top wall of the positioning groove 301, and a sealing ring 31 is provided in the annular groove 302. The sealing ring 31 is in interference fit with the inner wall of the annular groove 302 and the flange structure 15, which can ensure the sealing effect on the inner cavity 300.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An ultrasonic amplitude transformer, characterized in that, include: The first and second amplitude transformers are connected and coaxially arranged. The projection of the second amplitude transformer along its central axis lies within the first amplitude transformer, and a receiving cavity is provided at the end of the second amplitude transformer away from the first amplitude transformer. A positioning rod is disposed on the first luffing rod at one end away from the second luffing rod, and is coaxially arranged with the first luffing rod. A flange structure is provided on the side wall of the first amplitude transformer body, and has a gap between it and the side wall of the second amplitude transformer body. An adjusting block extends into the gap and is at least partially connected to the first amplitude rod body at one end near the second amplitude rod body, and abuts against a portion of the side wall of the second amplitude rod body; The first luffing rod or flange structure has symmetrical mounting holes that axially penetrate the body. The adjusting block has a locking hole. The adjusting block is locked by a bolt that passes through one of the mounting holes and extends into the locking hole. The adjusting block has a symmetrical structure, and the vertical distance between its sidewall and the second luffing rod gradually decreases from top to bottom. The projection of the contact surface between the adjusting block and the second luffing rod along the central axis of the second luffing rod is less than a semicircular arc and greater than one-fifth of a circular arc. The lower end face of the adjusting block is flush with the second luffing rod. The lower end of the adjusting block is higher than the lower end of the second luffing rod.

2. The ultrasonic amplitude transformer according to claim 1, characterized in that, The mounting hole is a countersunk hole structure.

3. An ultrasonic transducer, characterized in that, The device includes piezoelectric ceramics and the ultrasonic amplitude transformer according to any one of claims 1 to 2, wherein the piezoelectric ceramics are sleeved on the positioning rod body and abut against the end of the first amplitude transformer body away from the second amplitude transformer body.

4. An ultrasonic cutting tool, characterized in that, The device includes a handle, a cutting tool, and the ultrasonic transducer as described in claim 3, one end of which extends into the inner cavity of the handle, the flange structure is connected to the handle, and the cutting tool is disposed within the receiving cavity.

5. The ultrasonic cutting tool according to claim 4, characterized in that, The tool holder has a positioning groove on its inner wall near the opening of the inner cavity, and the flange structure is fixedly connected to the positioning groove.

6. The ultrasonic cutting tool according to claim 4 or 5, characterized in that, An annular groove is formed between the flange structure and the tool holder, and a sealing ring is provided in the annular groove.

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