Ultrasonic knife device with telescopic and rotatable knife bar

Abstract

The ultrasonic scalpel device comprises a base, an instrument rod, an inner rod, a scalpel head, the scalpel rod, a scalpel head transmission mechanism, a scalpel rod telescoping mechanism and a scalpel rod rotating mechanism. The instrument rod is of a hollow structure, one end of the instrument rod is located in the base, the inner rod is movably arranged in the instrument rod and is of a hollow structure, and the cutter rod is movably arranged in the inner rod; the tool bit transmission mechanism is connected with the inner rod and can drive the tool bit to be opened and closed through the inner rod. The cutter bar telescoping mechanism is used for driving the cutter bar to axially telescope, the cutter bar rotating mechanism is fixedly connected with the cutter bar, and the cutter bar rotating mechanism is used for driving the cutter bar to rotate; the cutter bar telescoping mechanism and the cutter bar rotating mechanism are arranged in the base, the input end of the cutter bar rotating mechanism is connected with the first input part, the input end of the cutter bar telescoping mechanism is connected with the second input part, and the first input part and the second input part are fixed in the base and suitable for being externally connected with a driving device respectively. The ultrasonic knife device has better flexibility, is beneficial to surgical operation, reduces tissue damage, is beneficial to grasping and pulling tissues, and can shorten the surgical time and improve the working efficiency of doctors.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to an ultrasonic knife device with a retractable and rotatable knife rod. Background Art

[0002] Ultrasonic scalpel, also known as ultrasonic cutting hemostatic scalpel, works by converting electrical energy into high-frequency vibration mechanical energy through the piezoelectric ceramics in the transducer. The high-frequency mechanical vibration of the scalpel acts on the tissue to coagulate the protein in the tissue, thereby achieving the effect of stripping the tissue and closing the blood vessels. Compared with traditional electric scalpels, ultrasonic scalpels cause less damage to tissues, so they are increasingly used in clinical practice.

[0003] In the prior art, the blade of the ultrasonic scalpel is fixed relative to the whole instrument, which limits its flexibility to some extent and is not conducive to surgical operation. In addition, in order for the blade to obtain high-frequency vibration energy of a specific frequency, the front end of the blade is designed to be smooth. Although there is a toothed structure on the blade head, when the ultrasonic scalpel is closed, the blade is parallel to the blade head, and the gripping force after closing is small, which is not conducive to surgical operation. Summary of the invention

[0004] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] An ultrasonic knife device with a retractable and rotatable knife rod, comprising: a base, an instrument rod, an inner rod, a knife head, a knife rod, a knife head transmission mechanism, a knife rod retractable mechanism, and a knife rod rotating mechanism; the instrument rod is a hollow structure, one end of the instrument rod is located in the base, the inner rod is movably arranged in the instrument rod, the inner rod is a hollow structure, and the knife rod is movably arranged in the inner rod; the knife head transmission mechanism is connected to the inner rod and can drive the knife head to open and close through the inner rod; the knife rod retractable mechanism is used to drive the knife rod to retract axially, the knife rod rotating mechanism is fixedly connected to the knife rod, and the knife rod rotating mechanism is used to drive the knife rod to rotate; the knife rod retractable mechanism and the knife rod rotating mechanism are arranged in the base, the input end of the knife rod rotating mechanism is connected to the first input part, the input end of the knife rod retractable mechanism is connected to the second input part, the first input part and the second input part are fixed in the base and are suitable for external driving devices respectively.

[0006] Furthermore, the cutter head transmission mechanism includes a cutter head gear assembly and a cutter head screw. The cutter head gear assembly can drive the cutter head screw to move axially. The cutter head gear assembly is arranged in the base and the input end of the cutter head gear assembly is connected to the third input part. The third input part is fixed in the base and is suitable for an external driving device.

[0007] Furthermore, the knife bar rotation mechanism includes a knife bar rotation active gear, a knife bar rotation intermediate gear and a knife bar rotation passive gear. The knife bar rotation active gear is installed in cooperation with the first input part; the knife bar rotation active gear is meshed with the knife bar intermediate gear, the knife bar rotation intermediate gear is meshed with the knife bar passive gear, and the knife bar rotation passive gear is fixedly connected to the knife bar.

[0008] Furthermore, the knife bar telescopic assembly includes a knife bar telescopic active gear, a knife bar telescopic intermediate gear and a knife bar telescopic passive gear, and the knife bar telescopic active gear is installed in cooperation with the second input part.

[0009] Furthermore, the knife bar telescopic assembly includes a knife bar telescopic active reel, a knife bar telescopic driven reel, a first tension wire rope and a second tension wire rope, and the knife bar telescopic active reel is installed in cooperation with the second input part.

[0010] Furthermore, the second input part is a knife rod telescopic chuck, the knife rod telescopic active reel and the knife rod telescopic chuck are fixedly connected, the knife rod telescopic active reel and the knife rod telescopic chuck are provided with spiral grooves in opposite directions, one end of the first tension steel wire rope and the second tension steel wire rope are respectively fixed on the knife rod telescopic active reel and the knife rod telescopic chuck, and the other ends of the first tension steel wire rope and the second tension steel wire rope are respectively fixed in two spiral grooves in opposite directions of the knife rod telescopic driven reel.

[0011] Furthermore, the knife rod rotation passive gear can move axially, the knife rod rotation passive gear includes a gear part and a screw, the knife rod telescopic passive gear or the knife rod telescopic passive reel includes an internal threaded hole, the screw of the knife rod telescopic passive gear cooperates with the thread of the internal threaded hole, the rotation of the knife rod telescopic passive gear or the knife rod telescopic passive reel drives the knife rod rotation passive gear to move axially, and the rotation of the passive gear synchronously drives the knife rod to axially telescope.

[0012] Furthermore, when the knife bar rotating operation is performed, the knife bar rotating assembly and the knife bar telescopic assembly work synchronously.

[0013] Furthermore, the ultrasonic knife device also includes a rotating assembly, which can drive the instrument rod and the inner rod to rotate, and the rotating assembly includes a rotating active gear and a rotating passive gear meshing with the rotating active gear.

[0014] Furthermore, the rotating passive gear is a hollow structure, one end of the instrument rod is inserted into the hollow structure of the rotating passive gear, the rotating passive gear is provided with rotating passive gear holes which are relatively arranged along the circumference, the instrument rod is provided with instrument rod holes which are relatively arranged along the circumference, and an inner rod waist-shaped hole is provided at the corresponding position of the inner rod, and the connecting pin passes through the rotating passive gear hole, the instrument rod hole and the inner rod waist-shaped hole.

[0015] Furthermore, there are two connecting pins, and the passive gear holes and the instrument rod holes are respectively divided into two groups, each group includes two holes, the two passive gear holes in each group are arranged correspondingly, and the two instrument rod holes in each group are arranged correspondingly; the inner rod waist-shaped holes include two; each connecting pin passes through a group of passive gear holes, a group of instrument rod holes, and an inner rod waist-shaped hole respectively.

[0016] The blade rod of the ultrasonic knife device of the present invention is retractable and rotatable. When the blade rod is extended, it is used only as a cutting knife. When the blade rod is retracted, it is used as a grasping forceps and a cutting knife. The blade rod can be extended forward for a certain distance, so that the blade head is far away from the tissue in a narrow operating space, and the blade head does not occupy the visual field space, and the high-frequency mechanical vibration of the blade rod is used to cut the tissue; and when used as a grasping forceps, the curvature of the blade rod head can be used to rotate a certain angle as needed, such as 90 degrees, to form a grasping forceps structure with a closed tip and a hollow middle with the blade head, which is conducive to grasping and pulling tissues; and through the gear structure in the base, the blade rod can be rotated independently of the blade head and the instrument rod.

[0017] After adopting such a design, the present invention has at least the following advantages:

[0018] 1. Improving the gripping force of the ultrasonic scalpel is beneficial for grasping and pulling tissues, shortening the operation time, and improving the doctor's surgical efficiency.

[0019] 2. The knife rod is retractable and has better flexibility, which is conducive to surgical operation, reduces tissue damage and shortens operation time.

[0020] 2. The knife bar rotates independently of the instrument rod and the knife head, which improves the flexibility of instrument operation.

[0021] 3. The present invention has a simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a schematic diagram of the overall structure of the ultrasonic knife device of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of the blade end of the ultrasonic knife device of the present invention;

[0025] Figure 3 This is a schematic diagram of the cooperation between the blade head and the blade head rotating shaft of the ultrasonic blade device of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the base of the first embodiment of the ultrasonic knife device of the present invention;

[0027] Figure 5It is a cross-sectional schematic diagram of the base of the first embodiment of the ultrasonic knife device of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the base of the second embodiment of the ultrasonic knife device of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the rotating driving gear of the ultrasonic knife device of the present invention;

[0030] Figure 8 Schematic diagram of the matching structure of the connecting pin and the inner rod of the ultrasonic knife device of the present invention

[0031] Fig. 9 It is a schematic diagram of the ultrasonic knife device of the present invention in a state where the knife rod is not rotated and not extended;

[0032] Fig.10 It is a schematic diagram of the state after the blade rod of the ultrasonic knife device of the present invention rotates;

[0033] Fig.11 It is a schematic diagram of the state of the blade rod of the ultrasonic blade device of the present invention after being retracted.

[0034] Figure numerals, 10 base, 11 middle bracket, 12 top bracket, 20 instrument rod, 21 inner rod, 211 inner rod waist hole, 311 cutter head active gear, 312 cutter head passive gear, 32 cutter head screw, 33 cutter head chuck, 411 cutter rod rotation active gear, 412 cutter rod rotation intermediate gear, 413 cutter rod rotation passive gear, 43 cutter rod rotation chuck, 44 cutter rod fixed pin shaft, 451 first retaining ring, 452 second retaining ring, 453 third retaining ring , 454 fourth retaining ring, 455 fifth retaining ring, 456 sixth retaining ring, 50 cutter head, 51 cutter head rotating shaft, 52 rotating pin, 60 cutter rod, 61 cutter rod rubber sleeve, 611 cutter rod telescopic active gear, 612 cutter rod telescopic intermediate gear, 613 cutter rod telescopic passive gear, 621 cutter rod telescopic active reel, 622 cutter rod telescopic passive reel, 63 cutter rod telescopic chuck, 71 rotating active gear, 72 rotating passive gear, 73 rotating chuck, 74 connecting pin. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In this document, “upper”, “lower”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0037] See attached Figure 1-11 , an ultrasonic knife device with a retractable and rotatable knife rod, comprising: a base 10, an instrument rod 20, an inner rod 21, a knife head 50, a knife rod 60, a knife head transmission mechanism, a knife rod retractable mechanism, and a knife rod rotating mechanism; the instrument rod 20 is a hollow structure, one end of the instrument rod is located in the base 10, the inner rod 21 is movably arranged in the instrument rod 20, the inner rod 21 is a hollow structure, and the knife rod 60 is movably arranged in the inner rod 21; the knife head transmission mechanism is connected to the inner rod 21 and can drive the knife head 50 to open and close through the inner rod 21; the knife rod retractable mechanism is used to drive the knife rod 60 to retract axially, the knife rod rotating mechanism is fixedly connected to the knife rod 60, and the knife rod rotating mechanism is used to drive the knife rod 60 to rotate; the knife rod retractable mechanism and the knife rod rotating mechanism are arranged in the base 10, the input end of the knife rod rotating mechanism is connected to the first input part, and the input end of the knife rod retractable mechanism is connected to the second input part, the first input part and the second input part are fixed in the base 10 and are suitable for external driving devices respectively.

[0038] The cutter head transmission mechanism includes a cutter head gear assembly and a cutter head screw 32. The cutter head gear assembly can drive the cutter head screw 32 to move axially. The cutter head gear assembly 31 is arranged in the base 10 and the input end of the cutter head gear assembly 31 is connected to the third input part. The third input part is fixed in the base 10 and is suitable for an external driving device. The cutter head gear assembly 31 includes a plurality of gears. Preferably, the cutter head gear assembly 31 includes a cutter head driving gear 311 and a cutter head passive gear 312 meshing with the cutter head driving gear 311. The cutter head driving gear 311 is connected to the third input part. The cutter head passive gear 312 is provided with a thread in the middle, and the thread cooperates with the cutter head screw 32. The third input part is a cutter head chuck 33. The cutter head chuck 33 is installed in cooperation with the cutter head driving gear 311. The cutter head chuck 33 can be connected to an external surgical robot. The surgical robot can drive the cutter head chuck 33 to rotate. The rotation of the cutter head chuck 33 drives the cutter head driving gear 311 to rotate synchronously. The rotation of the cutter head driving gear 311 drives the cutter head passive gear 312 to rotate. The rotation of the cutter head passive gear 312 drives the cutter head screw 32 to move axially through the thread. The top end of the cutter head screw 32 is inserted into one end of the inner rod 21 for fixing. Preferably, the fixing method is welding. When the cutter head screw 32 moves axially, it drives the inner rod 21 to move up and down axially. The cutter head 50 is provided with two cutter head rotating shafts 51, which are respectively installed in two circular holes correspondingly arranged on the circumference of the other end of the inner rod 21. In addition, a rotating pin 52 is also provided, which passes through two rotating pin holes correspondingly arranged on the circumference of one end of the instrument rod 20 and a cutter head through hole correspondingly arranged on the cutter head 50, and the cutter head 50 can rotate around the rotating pin 52. When the inner rod 21 moves axially, the cutter head 50 is driven to rotate around the rotating pin 52 through the cutter head rotating shaft 51, thereby realizing the closing and opening of the cutter head 50.

[0039] The knife bar rotating mechanism includes a plurality of gears. Preferably, the knife bar rotating mechanism includes a knife bar rotating active gear 411, a knife bar rotating intermediate gear 412 and a knife bar rotating passive gear 413. The knife bar rotating active gear 411 is installed in cooperation with the first input part. Preferably, the first input part is the knife bar rotating chuck 43. The knife bar rotating active gear 411 is meshed with the knife bar rotating intermediate gear 412, and the knife bar rotating intermediate gear 412 is meshed with the knife bar rotating passive gear 413. The knife bar rotating passive gear 413 is fixedly connected to the knife bar 60. Preferably, the knife bar rotating passive gear 413 and the knife bar 60 are connected through a knife bar fixing pin 44. Preferably, a knife bar rubber sleeve 61 is provided on the knife bar 60, and a knife bar fixing pin 44 is provided with a knife bar fixing pin shaft rubber sleeve. The knife bar fixing pin shaft provided with the knife bar fixing pin shaft rubber sleeve passes through the knife bar rotating passive gear 413, the knife bar rubber sleeve 61 and the knife bar 60 to fix the knife bar 60 and the knife bar rotating passive gear 413 together. The provision of the rubber sleeve can effectively eliminate device damage caused by rigid collision between components.

[0040] The knife bar rotating chuck 43 can be externally connected to a surgical robot, and the surgical robot can drive the knife bar rotating chuck 43 to rotate, and the knife bar rotating chuck 43 can drive the knife bar rotating active gear 411 to rotate synchronously, and the rotation of the knife bar rotating active gear 411 drives the knife bar rotating intermediate gear 412 to rotate, and the rotation of the knife bar rotating intermediate gear 412 drives the knife bar rotating passive gear 413 to rotate, and the rotation of the knife bar rotating passive gear 413 drives the knife bar 60 to rotate. Because the knife bar head has a curved portion, and the curved portion has an arc, after the knife bar rotates a certain angle, the curved portion is opposite to the knife head. At this time, the curved portion and the knife head form a grasping forceps structure with a closed tip and a hollow middle, which is conducive to grasping and pulling tissues. The state of the knife bar before rotation is as follows Figure 8 As shown, the state of the tool bar after rotation is as follows Fig. 9 shown.

[0041] In one embodiment, the knife bar telescopic assembly includes a plurality of gears. Preferably, the knife bar telescopic assembly includes a knife bar telescopic active gear 611, a knife bar telescopic intermediate gear 612 and a knife bar telescopic passive gear 613. The knife bar telescopic active gear 611 is installed in cooperation with the second input part. Preferably, the second input part is a knife bar telescopic chuck 63. The knife bar telescopic active gear 611 is meshed with the knife bar telescopic intermediate gear 612. The knife bar telescopic intermediate gear 612 is meshed with the knife bar telescopic passive gear 613. The knife bar rotation passive gear 413 can move axially, and the knife bar rotation passive gear 413 includes a gear part and a screw rod. The knife bar telescopic passive gear 413 includes an internal threaded hole, and the thread of the internal threaded hole of the knife bar telescopic passive gear 613 cooperates with the thread of the screw rod of the knife bar rotation passive gear; the knife bar telescopic chuck 63 can be externally connected to a surgical robot, and the surgical robot can drive the knife bar telescopic chuck 63 to rotate, and the knife bar telescopic chuck 63 can drive the knife bar telescopic active gear 611 to rotate synchronously, and the rotation of the knife bar telescopic active gear 611 drives the knife bar telescopic intermediate gear 612 to rotate, and the rotation of the knife bar telescopic intermediate gear 612 drives the knife bar telescopic passive gear 613 to rotate, and the rotation of the knife bar telescopic passive gear 613 drives the knife bar rotation passive gear 613 to move axially through the thread. Since the knife bar rotation passive gear 613 and the knife bar are connected and fixed by the knife bar fixing pin 44, when the knife bar rotation passive gear 613 moves axially, it synchronously drives the knife bar 60 to telescope axially. The knife bar is in the unextended state as shown in FIG. Figure 8 As shown, the extension state of the tool bar is as follows Fig.10 shown.

[0042] In another embodiment, the knife bar telescopic assembly includes a knife bar telescopic active reel 621, a knife bar telescopic driven reel 622, a first tension wire rope 623 and a second tension wire rope 624; the knife bar telescopic driven reel includes an internal threaded hole, and the thread of the internal threaded hole of the telescopic passive reel cooperates with the thread of the knife bar rotation passive gear screw; the knife bar telescopic active reel 621 is installed on the knife bar telescopic driving chuck 63, and can rotate synchronously with the knife bar telescopic chuck 63. Two spiral grooves in opposite directions are arranged on the active retractable reel 621 and the retractable chuck 63. One end of the first tension wire rope 622 and the second tension wire rope 623 are respectively fixed on the active retractable reel 621 and the retractable chuck 63, and the other ends of the two wire ropes are respectively fixed in the spiral grooves in opposite directions of the driven retractable reel 622. When the retractable chuck 63 rotates, the active retractable reel 621 is driven to rotate synchronously, thereby driving the first tension wire rope 623 and the second tension wire rope 624 to rotate, and then driving the driven retractable reel 622 to rotate in the opposite direction. The rotation of the driven retractable reel 622 drives the axial movement of the driven gear 613 through the thread, thereby synchronously driving the axial extension and contraction of the retractable reel 60. The unextended state of the retractable reel is as follows: Figure 8 As shown, the extension state of the tool bar is as follows Fig.10 shown.

[0043] When the knife bar is extended, it is only used as a cutting knife. When the knife bar is retracted, it can be used as a grasping forceps and a cutting knife. When the knife bar is extended, it extends forward for a distance, so that the knife head is far away from the tissue in the narrow operating space, and the knife head does not occupy the visual field. The high-frequency mechanical vibration of the knife bar is used to cut the tissue, which can reduce tissue damage and shorten the operation time. When the knife bar is retracted, the knife bar and the knife head work together to grasp and pull the tissue.

[0044] It should be noted that when the knife bar is rotated, the knife bar rotation passive gear 413 rotates, because its thread cooperates with the thread of the knife bar telescopic passive gear 613 or the telescopic passive scroll 622, and the knife bar telescopic passive gear 613 or the telescopic passive scroll 622 can only rotate but not move axially, and the rotation of the knife bar rotation passive gear will drive the knife bar to move axially. Therefore, in order to ensure that the knife bar does not move axially and rotates normally when the knife bar rotates, when the knife bar is rotated, the knife bar telescopic assembly works synchronously under the drive of the knife bar telescopic chuck while the knife bar rotation assembly works, and by setting the output of the surgical robot, the knife bar telescopic passive gear 613 or the telescopic passive scroll 622 rotates synchronously with the knife bar rotation passive gear, so as to ensure the normal operation of the knife bar rotation passive gear 413, thereby ensuring the normal rotation of the knife bar 60.

[0045] The ultrasonic knife device also includes a rotating assembly, which can drive the instrument rod 20 and the inner rod 21 to rotate. The rotating assembly includes a rotating active gear 71 and a rotating passive gear 72 meshing with the rotating active gear 71. The rotating passive gear 72 is a hollow structure. One end of the instrument rod 20 is inserted into the hollow structure of the rotating passive gear. The rotating passive gear 72 is provided with rotating passive gear holes arranged relatively along the circumference. The instrument rod 20 is provided with instrument rod holes arranged relatively along the circumference. An inner rod waist-shaped hole 211 is provided at a corresponding position of the inner rod 21. The connecting pin 74 passes through the rotating passive gear hole, the instrument rod hole, and the inner rod waist-shaped hole 211. The size of the inner rod waist-shaped hole 211 is set so that the axial movement of the inner rod 21 is not affected by the connecting pin 74; further, there are two connecting pins 74, and the passive gear hole and the instrument rod hole are respectively two groups, each group includes two holes, and the two passive gear holes in each group are correspondingly arranged, and the two instrument rod holes in each group are correspondingly arranged; the inner rod waist-shaped holes 211 include two; each connecting pin 74 passes through a group of passive gear holes, a group of instrument rod holes, and an inner rod waist-shaped hole respectively. Further, the rotating active gear 71 is installed in cooperation with the fourth input part, which is fixed in the base 10 and is suitable for an external drive device. Preferably, the fourth input part is a rotating chuck 73, which can be externally connected to a surgical robot, and the surgical robot can drive the rotating chuck 73 to rotate, and the rotating chuck 73 can drive the rotating active gear 71 to rotate synchronously, and when the rotating active gear 71 rotates, it drives the rotating passive gear 72 to rotate, and when the rotating passive gear 72 rotates, it drives the instrument rod 20 and the inner rod 21 to rotate together. Due to the setting of the waist-shaped hole 211 of the inner rod, the connecting pin 74 does not limit the axial movement of the inner rod, and the axial movement of the inner rod is not affected by the connecting pin 74.

[0046] It should be noted that the knife bar rotating mechanism and the rotating assembly work independently of each other. When the knife bar rotating mechanism rotates the knife bar, the instrument bar and the inner rod are not affected. When the rotating assembly rotates the instrument bar and the inner rod, the knife bar is not affected. Therefore, when operating the instrument, if it is necessary to rotate the instrument bar, the inner rod and the knife bar at the same time, the rotating assembly and the knife bar rotating assembly need to work at the same time. At this time, the output of the surgical robot is set to synchronize the knife bar rotating chuck and the rotating chuck, so that the rotating assembly and the knife bar rotating assembly synchronously drive the instrument bar, the inner rod and the knife bar to rotate.

[0047] The base 10 is provided with a middle bracket 11 and a top bracket 12. The tool bar telescopic driving gear 611 passes through the base 10 and the top bracket 11 and is limited by the first retaining ring 451. The tool bar telescopic intermediate gear 612 passes through the base 10 and the top bracket 11 and is limited by the second retaining ring 452. The tool bar rotation driving gear 411 passes through the base 10 and the middle bracket 11 and is limited by the third retaining ring 453. The cutter head driving gear 311 passes through the base 10 and is limited by the fourth retaining ring 454. The tool bar telescopic chuck 43 is installed on the base in cooperation with the bearing, passes through the middle bracket 11, and is installed on the top bracket 12 in cooperation with the bearing, and is clamped on the tool bar telescopic chuck with the fifth retaining ring 455 for axial limitation. The tool bar telescopic driven reel 622 passes through the top bracket 12 and cooperates with the bearing, and is axially limited by the sixth retaining ring 456. The setting of the above-mentioned retaining ring can prevent the gears from being offset and misaligned due to the vibration of the driving device such as the motor, effectively improving the stability of the assembly, and thus ensuring the stability of the use of the ultrasonic knife; in addition, one or two bearings are also provided on the rotating passive gear, the knife rod telescopic passive gear, and the knife head passive gear. The setting of the bearings can improve the smoothness of the gear rotation.

[0048] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the invention disclosed in the specification and examples. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in the present invention. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0049] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An ultrasonic knife device with a retractable and rotatable knife rod, comprising: Base, instrument rod, inner rod, cutter head, cutter rod, cutter head transmission mechanism, cutter rod telescopic mechanism, cutter rod rotating mechanism; The instrument rod is a hollow structure, one end of the instrument rod is located in the base, the inner rod is movably arranged in the instrument rod, the inner rod is a hollow structure, and the knife rod is movably arranged in the inner rod; the knife head transmission mechanism is connected to the inner rod and can drive the knife head to open and close through the inner rod; the knife rod rotating mechanism is fixedly connected to the knife rod, the knife rod rotating mechanism is used to drive the knife rod to rotate, and the knife rod telescopic mechanism is used to drive the knife rod to axially telescope; The knife bar telescopic mechanism and the knife bar rotating mechanism are arranged in the base, the input end of the knife bar rotating mechanism is connected to the first input part, and the input end of the knife bar telescopic mechanism is connected to the second input part. The first input part and the second input part are fixed in the base and are suitable for external driving devices respectively.

2. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 1, characterized in that: The cutter head transmission mechanism includes a cutter head gear assembly and a cutter head screw. The cutter head gear assembly can drive the cutter head screw to move axially. The cutter head gear assembly is arranged in the base and the input end of the cutter head gear assembly is connected to the third input part. The third input part is fixed in the base and is suitable for an external driving device.

3. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 1 or 2, characterized in that: The tool rod rotation mechanism includes a tool rod rotation active gear, a tool rod rotation intermediate gear and a tool rod rotation passive gear. The tool rod rotation active gear is installed in conjunction with the first input part; the tool rod rotation active gear is meshed with the tool rod intermediate gear, the tool rod rotation intermediate gear is meshed with the tool rod passive gear, and the tool rod rotation passive gear is fixedly connected to the tool rod.

4. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 3, characterized in that: The knife bar telescopic assembly comprises a knife bar telescopic active gear, a knife bar telescopic intermediate gear and a knife bar telescopic passive gear. The knife bar telescopic active gear is installed in cooperation with the second input part.

5. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 3, characterized in that: The knife bar telescopic assembly comprises a knife bar telescopic active reel, a knife bar telescopic driven reel, a first tension steel wire rope and a second tension steel wire rope, and the knife bar telescopic active reel is installed in cooperation with the second input part.

6. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 5, characterized in that: The second input part is the knife bar telescopic chuck, the knife bar telescopic active reel and the knife bar telescopic chuck are fixedly connected, the knife bar telescopic active reel and the knife bar telescopic chuck are provided with spiral grooves in opposite directions, one end of the first tension steel wire rope and the second tension steel wire rope are respectively fixed on the knife bar telescopic active reel and the knife bar telescopic chuck, and the other ends of the first tension steel wire rope and the second tension steel wire rope are respectively fixed in the two spiral grooves in opposite directions of the knife bar telescopic driven reel.

7. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 4, characterized in that: The tool rod rotation passive gear can move axially, the tool rod rotation passive gear includes a gear part and a screw rod, the tool rod telescopic passive gear includes an internal threaded hole, the screw rod of the tool rod rotation passive gear cooperates with the thread of the internal threaded hole, so that the rotation of the tool rod telescopic passive gear drives the tool rod rotation passive gear to move axially, and the rotation of the passive gear synchronously drives the tool rod to axially telescope.

8. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 5, characterized in that: The knife rod rotation passive gear can move axially. The knife rod rotation passive gear includes a gear part and a screw. The knife rod telescopic passive reel includes an internal threaded hole. The screw of the knife rod rotation passive gear cooperates with the thread of the internal threaded hole, so that the rotation of the knife rod telescopic passive reel drives the knife rod rotation passive gear to move axially, and the rotation of the passive gear synchronously drives the knife rod to telescope axially.

9. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 7 or 8, characterized in that: When the knife bar rotating operation is performed, the knife bar rotating assembly and the knife bar telescopic assembly work synchronously.

10. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 7 or 8, characterized in that: The ultrasonic knife device also includes a rotating assembly, which can drive the instrument rod and the inner rod to rotate. The rotating assembly includes a rotating active gear and a rotating passive gear meshing with the rotating active gear.

11. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 10, characterized in that: The rotating passive gear is a hollow structure, one end of the instrument rod is inserted into the hollow structure of the rotating passive gear, the rotating passive gear is provided with rotating passive gear holes arranged relatively along the circumference, the instrument rod is provided with instrument rod holes arranged relatively along the circumference, and an inner rod waist-shaped hole is provided at the corresponding position of the inner rod, and the connecting pin passes through the rotating passive gear hole, the instrument rod hole, and the inner rod waist-shaped hole.

12. The ultrasonic knife device with a retractable and rotatable knife rod as claimed in claim 11, characterized in that: There are two connecting pins, and the passive gear holes and the instrument rod holes are respectively divided into two groups, each group includes two holes, the two passive gear holes in each group are arranged correspondingly, and the two instrument rod holes in each group are arranged correspondingly; the inner rod waist-shaped holes include two; each connecting pin passes through a group of passive gear holes, a group of instrument rod holes, and an inner rod waist-shaped hole respectively.

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