CN114343775B - Longitudinal and bending composite ultrasonic vibration reciprocating sternum saw - Google Patents
Longitudinal and bending composite ultrasonic vibration reciprocating sternum saw Download PDFInfo
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- CN114343775B CN114343775B CN202210013488.6A CN202210013488A CN114343775B CN 114343775 B CN114343775 B CN 114343775B CN 202210013488 A CN202210013488 A CN 202210013488A CN 114343775 B CN114343775 B CN 114343775B
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- 210000001562 sternum Anatomy 0.000 title claims abstract description 49
- 238000005452 bending Methods 0.000 title claims abstract description 20
- 239000002131 composite material Substances 0.000 title abstract description 11
- 241000737022 Prionurus microlepidotus Species 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 12
- 230000033001 locomotion Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 32
- 230000006378 damage Effects 0.000 abstract description 11
- 210000000988 bone and bone Anatomy 0.000 abstract description 8
- 230000002980 postoperative effect Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000081 body of the sternum Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000007675 cardiac surgery Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Abstract
The invention discloses a longitudinal bending composite ultrasonic vibration reciprocating sternum saw, which comprises a saw blade, a saw blade chuck, a sternum saw main body and a sternum saw tail; the tail part of the sternum saw comprises a driving shaft which can rotate under the action of a motor; the sternum saw main body comprises an ultrasonic vibrator device and a reciprocating device, the reciprocating device comprises a sleeve, a driving bevel gear, a driven bevel gear, an eccentric shaft and a connecting plate, the driving bevel gear is connected to the driving shaft and can synchronously rotate with the driving shaft so as to drive the driven bevel gear to rotate, the eccentric shaft is connected to the driven bevel gear and can rotate around the axis of the driven bevel gear along with the driven bevel gear, one end of the connecting plate is rotationally connected with the eccentric shaft, and the other end of the connecting plate is rotationally connected with the sleeve; the ultrasonic vibrator device comprises a transducer main body and an amplitude transformer, and the amplitude transformer is respectively connected with the saw blade chuck and the sleeve. The invention can be used for sawing operation of large bone mass, can improve the cutting efficiency while reducing the cutting damage, and shortens the postoperative recovery time of patients.
Description
Technical Field
The invention relates to an orthopaedics cutting instrument for sternal sawing, in particular to a longitudinal bending compound ultrasonic vibration reciprocating sternal saw.
Background
Sternal sawing is an essential key procedure in performing sternal cleavage surgery and is also an essential step in performing, for example, cardiac surgery. During sternal splitting procedures, a physician typically needs to saw the sternum, at which time the physician uses an orthopedic cutting instrument (i.e., a sternal saw) to cut and remove the sternum for subsequent surgical procedures.
In the sternum sawing process, the sternum saw reciprocating frequency is 0-20000 times/min, the sternum saw sawing stroke is about 4mm, when the saw frequency is relatively high, the too large cutting damage is easily caused, irreversible damage can be caused to the sternum for a long time, and the comfort of a patient and postoperative recovery are seriously affected. In order to reduce cutting damage, improved innovations in current sternum saws are necessary.
Research shows that the coupling of ultrasonic vibration in traditional industrial processing can not only improve the material removal rate, but also obviously reduce the cutting force and improve the surface cutting quality of the material. The ultrasonic bone knife technology is an emerging bone cutting technology, has sufficient safety and accuracy in surgical operations, is an operation tool for crushing and cutting bone tissues or tooth bodies by converting electric energy into mechanical energy through an ultrasonic vibrator device to enable the cutter head to be in a high-frequency resonance state and utilizing the strong mechanical acceleration of the cutter head and cavitation of ultrasonic vibration, has hard tissue identification capability, can avoid damaging soft tissues such as nerves and blood vessels to the greatest extent, can reduce cutting temperature and reduce thermal injury, and is fast in patient postoperative healing. However, the ultrasonic osteotome is only suitable for bone tissue cutting operations with a small range or thickness smaller than 3mm at present, such as minimally invasive spine operations and oral and maxillofacial surgery or minimally invasive or small bone tissue excision operations, is not suitable for bone tissue cutting with large bone mass and large range, such as sternum, and has the defects of low transmission efficiency, poor stability and the like, and is not mature enough in the current practical clinical application. However, the traditional sternum saw at present is easy to cause excessive cutting damage, and the comfort and postoperative recovery of patients are seriously affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the longitudinal bending composite ultrasonic vibration reciprocating sternum saw which has the advantages of high cutting efficiency, small cutting damage and the like compared with the conventional sternum saw.
The technical scheme adopted by the invention is as follows: a compound ultrasonic vibration reciprocating sternum saw for longitudinal bending comprising:
a saw blade;
a blade clamp for clamping the blade;
the sternum saw tail comprises a machine body rear shell and a driving shaft, the driving shaft is arranged in the machine body rear shell, and the tail end of the driving shaft can be connected with an output shaft of a motor and can rotate under the action of the motor;
a sternum saw body comprising a middle housing, an ultrasonic vibrator device and a reciprocating device, wherein,
the middle outer shell is connected with the machine body rear shell;
the reciprocating motion device comprises a sleeve, a driving bevel gear, a driven bevel gear, an eccentric shaft and a connecting plate; the sleeve and the driving shaft are coaxially arranged and arranged in the middle shell, and a first linear bearing is arranged between the middle shell and the sleeve; the axis of the driven bevel gear is perpendicular to the axis of the driving shaft, and the driven bevel gear is meshed with the driving bevel gear; the driving bevel gear is coaxially arranged with the driving shaft, and the driving bevel gear is connected to the driving shaft and can synchronously rotate with the driving shaft so as to drive the driven bevel gear to rotate; the eccentric shaft is connected to the driven bevel gear and can rotate around the axis of the driven bevel gear along with the driven bevel gear; one end of the connecting plate is rotationally connected with the eccentric shaft, and the other end of the connecting plate is rotationally connected with the sleeve, so that the rotation of the driven bevel gear is converted into longitudinal reciprocating motion of the sleeve through the synergistic effect of the eccentric shaft and the connecting plate;
the ultrasonic vibrator device comprises a transducer main body and a variable amplitude rod, wherein the transducer main body is arranged in the sleeve, the output end of the variable amplitude rod extends out of the middle shell and is connected with the saw blade chuck, and the variable amplitude rod is connected with the sleeve so as to drive the saw blade to longitudinally reciprocate while transmitting vibration to the saw blade.
Further, the axis of the eccentric shaft is arranged at a distance from the axis of the driven bevel gear, so that when the eccentric shaft rotates around the axis of the driven bevel gear, a left limit position and a right limit position exist in the longitudinal direction, and the distance between the left limit position and the right limit position is the longitudinal movement range of the saw blade.
Further, the transducer body includes:
the transducer is formed by alternately arranging piezoelectric ceramics and electrode plates; and
a fastening bolt connecting the transducer and the horn together;
the external power transmission device transmits current to the electrode plate of the energy converter, so that the piezoelectric ceramic generates vibration, and the vibration is transmitted to the saw blade after the amplification of the amplitude transformer.
Further, the connection position of the amplitude transformer and the sleeve is the pitch surface position of the amplitude transformer, and the pitch surface position is the position where the amplitude of ultrasonic vibration is zero, so that the amplitude transformer cannot drive the sleeve to vibrate.
Further, a groove is formed in the output end of the amplitude transformer, so that ultrasonic vibration in two directions of longitudinal bending is generated at the output end of the amplitude transformer.
Further, the sternum saw main body further comprises a front shell, the front shell is connected to the end face, close to the saw blade, of the middle shell, a through hole for penetrating the amplitude transformer is formed in the center of the front shell, and a second linear bearing is arranged between the amplitude transformer and the through hole.
Further, the sternum saw body further comprises a battery compartment, the battery compartment is connected to the middle shell, and the battery compartment provides a power source for the motor.
Further, a cylindrical roller bearing group is arranged between the machine body rear shell and the driving shaft.
Further, the ultrasonic vibrator device is arranged coaxially with the saw blade collet, and the ultrasonic vibrator device is arranged coaxially with the sternum saw tail.
The beneficial effects of the invention are as follows: the invention provides a longitudinal bending composite ultrasonic vibration reciprocating sternal saw for sternal cutting, which can be used for large-bone sawing operation, can improve cutting efficiency while reducing cutting damage, and shortens postoperative recovery time of patients. Compared with the prior sternum saw, the longitudinal bending compound ultrasonic vibration reciprocating sternum saw can reduce cutting force, improve cutting efficiency, improve cutting surface roughness, improve sawing quality and reduce cutting damage, is more beneficial to postoperative recovery of patients, and has the advantages of reducing cutting force, improving cutting surface quality and reducing cutting damage compared with the one-dimensional ultrasonic vibration reciprocating sternum saw.
Drawings
Fig. 1: the invention relates to a longitudinal bending composite ultrasonic vibration reciprocating sternum saw structure schematic diagram;
fig. 2: the ultrasonic vibrator device of the invention has a schematic structure;
fig. 3: the middle shell structure of the invention is schematically shown;
fig. 4: the middle outer shell is in a cross-section;
fig. 5: the collet chuck structure of the invention is schematically shown;
fig. 6: the structure of the connecting plate is schematically shown;
fig. 7: the collet chuck base structure of the invention is schematically shown;
fig. 8: the driven bevel gear structure of the invention is schematically shown;
fig. 9: the driven bevel gear fixing piece is structurally schematic;
fig. 10: the transducer structure of the invention is schematically shown;
the drawings are marked:
1, a machine body rear shell; 2-a sealing gasket;
3-cylindrical roller bearing; 4, a spacer bush;
5—an active drive shaft; 6-driven bevel gear mount;
6-1, a stepped hole; 7-drive bevel gear;
8-driven bevel gear; 8-1, an eccentric shaft;
9-connecting plate; 9-1-a connecting hole;
9-2, pin roll; 10-middle shell;
11—a first linear bearing; 12-a sleeve;
13-a back cover plate; 14—piezoelectric ceramic;
15-amplitude transformer; 16-front housing;
17-collet chuck base; 18—collet nut;
19—a saw blade; 20-collet chuck;
21-circlips; 22-screw;
23—electrode sheet; 24-insulating sleeve;
25—fastening bolts; 26-battery compartment;
27-shaft end retainer ring; 28-a second linear bearing.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
as shown in fig. 1 to 10, a longitudinal bending composite ultrasonic vibration reciprocating sternal saw comprises a machine body and a saw blade 19, wherein the machine body mainly comprises a saw blade chuck, a sternal saw main body and a sternal saw tail which are connected in sequence.
The blade clamp is used to clamp the saw blade 19. In this embodiment, the existing saw blade clamping head is adopted, and the saw blade clamping head comprises a collet chuck base 17, a collet chuck 20 for clamping the saw blade 19, and a collet chuck nut 18 matched with the collet chuck base 17 to clamp the collet chuck 20, and the saw blade 19 is inserted into the collet chuck 20, and then the collet chuck nut 18 is screwed tightly, so that the complete fixation of the saw blade 19 can be realized.
The internal construction of the main body of the sternum saw and the tail of the sternum saw is mainly for transmitting the power of the motor to the saw blade 19 in the saw blade chuck, and the saw blade 19 is vibrated at high frequency while reciprocating under the ultrasonic vibrator device.
The sternum saw tail comprises a machine body rear shell 1 and a motor connecting device, wherein the motor connecting device comprises a driving shaft 5, a cylindrical roller bearing group, a shaft end retainer ring 27 and the like, and the purpose is to transmit power transmitted by a motor to a driving bevel gear 7 through the driving shaft 5 and then to a saw blade 19 through a sternum saw main body. The engine body rear shell 1 is cylindrical structure, the initiative drive shaft 5 sets up in engine body rear shell 1 cover, the one end external connection that initiative drive shaft 5 is close to the motor has cylindrical roller bearing group, cylindrical roller bearing group is used for supporting the rotation of initiative drive shaft 5, cylindrical roller bearing group installs in engine body rear shell 1, the inner boss through engine body rear shell 1 and sealing gasket 2 block cylindrical roller bearing group's outer lane, cylindrical roller bearing group cooperates with engine body rear shell 1's inner wall, and cylindrical roller bearing group's afterbody installs axle head retaining ring 27, prop against cylindrical roller bearing group's inner circle, axle head retaining ring 27 installs on initiative drive shaft 5, in addition, set up sealing gasket 2 between cylindrical roller bearing group and engine body rear shell 1's the rear end face. The cylindrical roller bearing group consists of a plurality of cylindrical roller bearings 3, and two adjacent cylindrical roller bearings 3 are mutually separated by a spacer 4. The driving shaft 5 is provided with an inner triangular hole at the tail part thereof, and the inner triangular hole is used for transmitting power with the output shaft of the motor.
The sternum saw body comprises, among other things, a middle housing 10, a front housing 16, a battery compartment 26, an ultrasound vibrator device and a reciprocating device. The middle shell 10 is of a cylindrical structure, the tail end of the middle shell is connected with the machine body rear shell 1, the head end of the middle shell is connected with the front shell 16, and a through hole for penetrating the amplitude transformer 15 is formed in the center of the front shell 16. The battery compartment 26 is connected with the middle housing 10 through bolts and is used for providing a power source for the motor; the battery compartment 26 is located adjacent to the motor and in a neutral position with respect to the main body of the sternum saw.
The reciprocating means comprises a sleeve 12, a drive bevel gear 7, a driven bevel gear 8, an eccentric shaft 8-1, a connecting plate 9, a first linear bearing 11, a driven bevel gear fixing member 6 and the like. The sleeve 12 is of a cylindrical structure, the sleeve 12 and the driving shaft 5 are coaxially arranged and arranged in the middle outer shell 10, and a first linear bearing 11 is arranged between the middle outer shell 10 and the sleeve 12 and used for reducing friction during linear motion; the first linear bearing 11 is axially fixed by the middle housing 10 and the front housing 16. The axis of the driven bevel gear 8 is perpendicular to the axis of the drive shaft 5, and the driven bevel gear 8 is meshed with the drive bevel gear 7; the drive bevel gear 7 is arranged coaxially with the drive shaft 5, and the drive bevel gear 7 is connected to the drive shaft 5 to cooperate with the drive shaft 5 for power transmission to drive the driven bevel gear 8 to rotate. As shown in fig. 8, the eccentric shaft 8-1 is connected to the driven bevel gear 8 to rotate around the axis of the driven bevel gear 8 along with the driven bevel gear 8, and the axis of the eccentric shaft 8-1 is arranged at a distance from the axis of the driven bevel gear 8, so that when the eccentric shaft 8-1 rotates around the axis of the driven bevel gear 8, there are left and right limit positions in the longitudinal direction, and the distance between the left and right limit positions is the range of longitudinal movement of the saw blade 19. As shown in fig. 9, the eccentric shaft 8-1 is matched with the stepped hole 6-1 on the driven bevel gear fixing piece 6, so that the position of the driven bevel gear 8 is fixed. The connecting plate 9 drives the sleeve 12 to reciprocate by using the rotation of the driven bevel gear 8, as shown in fig. 6, one end of the connecting plate 9 is provided with a connecting hole 9-1 and is rotationally connected with the eccentric shaft 8-1 through the connecting hole 9-1, the other end is provided with a pin 9-2 and is rotationally connected with the sleeve 12 through the pin 9-2, so that the connecting plate 9 can rotate relative to the eccentric shaft 8-1 and rotate relative to the sleeve 12, thereby realizing the power transmission from the driven bevel gear 8 to the sleeve 12 through the cooperation of the eccentric shaft 8-1 and the connecting plate 9, and converting the rotation of the driven bevel gear 8 into the longitudinal reciprocation of the sleeve 12.
As shown in fig. 2, the ultrasonic vibrator device comprises a transducer main body and a horn 15, wherein the transducer main body is arranged in a sleeve 12 and comprises a transducer, an insulating sleeve 24, a rear cover plate 13 and a fastening bolt 25, and the fastening bolt 25 connects the horn 15, the transducer and the rear cover plate 13 together and compresses the transducer and the rear cover plate 13 so as to better transmit vibration; the transducer is sleeved on the fastening bolt 25, and an insulating sleeve 24 is arranged between the transducer and the fastening bolt 25. The transducer is composed of piezoelectric ceramics 14 and electrode plates 23 which are overlapped alternately, as shown in fig. 10, and mainly has the function of generating high-frequency vibration, and an external electricity transmission device transmits current to the electrode plates 23 of the transducer, so that the piezoelectric ceramics 14 generate high-frequency vibration, and then the high-frequency vibration is transmitted to the saw blade 19 after the amplification of the amplitude transformer 15. The joint surface position of the amplitude transformer 15 is connected with the sleeve 12 through the screw 22, so that the transmission of power from the sleeve 12 to the ultrasonic vibrator device is realized, and the joint surface position is the position where the amplitude of ultrasonic vibration is zero, so that the amplitude transformer 15 can not drive the sleeve 12 to vibrate, and the movement of the sternum saw is influenced. The amplitude transformer 15 can generate ultrasonic vibration under the action of the transducer, and due to the groove design of the output end of the amplitude transformer 15, ultrasonic vibration in two directions of longitudinal bending can be generated at the output end of the amplitude transformer 15, and the vibration in the two directions can be coupled into elliptical vibration. The output end of the amplitude transformer 15 passes through the central through hole of the front shell 16 and extends out of the front shell 16 to be connected with the saw blade chuck, so as to drive the saw blade 19 to longitudinally reciprocate while transmitting vibration to the saw blade 19. A second linear bearing 28 is arranged between the amplitude transformer 15 and the through hole of the front shell 16, so as to reduce the friction force when the amplitude transformer 15 moves linearly; circlips 21 are provided on the left and right sides of the through hole to limit axial displacement of the second linear bearing 28.
The axis of the ultrasonic vibrator device is coincident with the axis of the saw blade chuck, and the axis of the tail of the sternum saw is coincident with the axis of the ultrasonic vibrator device.
When the invention works, power is transmitted to the driving bevel gear 7 through the driving shaft 5 in the tail part of the sternum saw, the driving bevel gear 7 is meshed with the driven bevel gear 8, the eccentric shaft 8-1 on the driven bevel gear 8 is connected with the connecting plate 9, the connecting plate 9 is connected with the sleeve 12, the power realizes the transmission from the driving bevel gear 7 to the sleeve 12, the sleeve 12 is connected with the amplitude transformer 15, the amplitude transformer 15 is connected with the saw blade chuck, and finally the longitudinal reciprocating motion of the saw blade chuck and the saw blade 19 is realized. Meanwhile, the transducer is connected with the amplitude transformer 15, longitudinal bending ultrasonic vibration is transmitted to the saw blade 19 through the amplitude transformer 15, longitudinal reciprocating motion of the saw blade 19 is achieved, and meanwhile longitudinal bending composite high-frequency vibration is also carried out, so that the purpose of ultrasonic vibration sawing is achieved.
In conclusion, the novel longitudinal bending composite ultrasonic vibration reciprocating sternum saw for sternum cutting is designed by the composite longitudinal bending ultrasonic high-frequency vibration technology based on the conventional sternum saw technology. The longitudinal bending composite ultrasonic vibration reciprocating sternal saw can remarkably improve the sternal cutting efficiency, reduce the cutting force in sternal cutting, improve the sternal cutting quality, reduce cutting damage and improve the comfort level of patients.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are within the scope of the present invention.
Claims (9)
1. A compound ultrasonic vibration reciprocating sternal saw for longitudinal bending, comprising:
a saw blade (19);
a blade clamp for clamping the blade (19);
the sternum saw tail comprises a machine body rear shell (1) and a driving shaft (5), wherein the driving shaft (5) is arranged in the machine body rear shell (1), and the tail end of the driving shaft (5) can be connected with an output shaft of a motor and can rotate under the action of the motor;
a sternum saw body comprising a middle housing (10), an ultrasonic vibrator device and a reciprocating device, wherein,
the middle shell (10) is connected with the machine body rear shell (1);
the reciprocating motion device comprises a sleeve (12), a driving bevel gear (7), a driven bevel gear (8), an eccentric shaft (8-1) and a connecting plate (9); the sleeve (12) and the driving shaft (5) are coaxially arranged and arranged in the middle shell (10), and a first linear bearing (11) is arranged between the middle shell (10) and the sleeve (12); the axis of the driven bevel gear (8) is perpendicular to the axis of the driving shaft (5), and the driven bevel gear (8) is meshed with the driving bevel gear (7); the drive bevel gear (7) is coaxially arranged with the drive driving shaft (5), and the drive bevel gear (7) is connected to the drive driving shaft (5) and can synchronously rotate with the drive driving shaft (5) so as to drive the driven bevel gear (8) to rotate; the eccentric shaft (8-1) is connected to the driven bevel gear (8) and can rotate along with the driven bevel gear (8) around the axis of the driven bevel gear (8); one end of the connecting plate (9) is rotationally connected with the eccentric shaft (8-1), and the other end of the connecting plate is rotationally connected with the sleeve (12) so as to convert the rotation of the driven bevel gear (8) into the longitudinal reciprocating motion of the sleeve (12) through the cooperation of the eccentric shaft (8-1) and the connecting plate (9);
the ultrasonic vibrator device comprises a transducer main body and a variable amplitude rod (15), wherein the transducer main body is arranged in the sleeve (12), the output end of the variable amplitude rod (15) extends out of the middle shell (10) and is connected with the saw blade chuck, and the variable amplitude rod (15) is connected with the sleeve (12) so as to drive the saw blade (19) to longitudinally reciprocate while transmitting vibration to the saw blade (19).
2. The compound ultrasonic vibration reciprocating sternum saw of claim 1, characterized in that the axis of the eccentric shaft (8-1) is arranged at a distance from the axis of the driven bevel gear (8) such that when the eccentric shaft (8-1) rotates around the axis of the driven bevel gear (8), there are left and right extreme positions in the longitudinal direction, the distance between which is the range of longitudinal movement of the saw blade (19).
3. The compound ultrasonic vibration reciprocating sternal saw of claim 1, the transducer body comprising:
the transducer consists of piezoelectric ceramics (14) and electrode plates (23) which are arranged alternately; and
-a fastening bolt (25), the fastening bolt (25) connecting the transducer and the horn (15) together;
the external power transmission device transmits current to the electrode plate (23) of the transducer, so that the piezoelectric ceramic (14) generates vibration, and the vibration is transmitted to the saw blade (19) after the amplification of the amplitude transformer (15).
4. The compound ultrasonic vibration reciprocating sternum saw as defined in claim 1, wherein the connection position of the horn (15) and the sleeve (12) is a nodal position of the horn (15), and the nodal position is a position where the amplitude of ultrasonic vibration is zero, so that the horn (15) does not drive the sleeve (12) to vibrate.
5. The compound ultrasonic vibration reciprocating sternum saw for longitudinal bending as defined in claim 1, wherein a groove is provided on the output end of the horn (15) to generate ultrasonic vibrations in both directions of longitudinal bending at the output end of the horn (15).
6. The compound ultrasonic vibration reciprocating sternum saw of claim 1, further comprising a front housing (16), the front housing (16) being connected to an end face of the middle housing (10) near the saw blade (19), a through hole for penetrating the horn (15) being provided in the center of the front housing (16), and a second linear bearing (28) being provided between the horn (15) and the through hole.
7. The compound ultrasonic vibration reciprocating sternum saw of claim 1, the sternum saw body further comprising a battery compartment (26), the battery compartment (26) being connected to the middle housing (10), the battery compartment (26) providing a power source for the motor.
8. The compound ultrasonic vibration reciprocating sternum saw of claim 1, characterized in that a cylindrical roller bearing set is arranged between the machine body rear shell (1) and the driving shaft (5).
9. The compound ultrasonic vibration reciprocating sternum saw of claim 1, where the ultrasonic vibrator device is arranged coaxially with the saw blade collet and the ultrasonic vibrator device is arranged coaxially with the sternum saw tail.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013488.6A CN114343775B (en) | 2022-01-06 | 2022-01-06 | Longitudinal and bending composite ultrasonic vibration reciprocating sternum saw |
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| CN202210013488.6A CN114343775B (en) | 2022-01-06 | 2022-01-06 | Longitudinal and bending composite ultrasonic vibration reciprocating sternum saw |
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| CN114343775A CN114343775A (en) | 2022-04-15 |
| CN114343775B true CN114343775B (en) | 2023-10-31 |
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