Power switching mechanism for reciprocating rotary motion and rotary cutter

Abstract

The utility model relates to the technical field of medical instruments, in particular to a power switching mechanism and a rotary cutter which are used for doing reciprocating rotation motion, the power switching mechanism is used for installing a cutter assembly and providing power for the cutter assembly, and an inner cutter tube can do reciprocating rotation motion in an outer cutter tube. The power switching mechanism comprises a reciprocating moving sleeve, a reciprocating driving assembly, a connecting main shaft and a power transmission assembly. The reciprocating moving sleeve is used for being fixedly connected with the inner knife tube. The reciprocating driving assembly is used for driving the reciprocating moving sleeve to reciprocate. And the connecting main shaft is used for driving the reciprocating sleeve to rotate. The power transmission assembly comprises a power input assembly, a rotation driving assembly and a reciprocating transmission assembly, the rotation driving assembly is used for driving the connecting main shaft to rotate, and the reciprocating transmission assembly is used for driving the reciprocating driving assembly to rotate. The power switching mechanism is simple in structure, all the structures are tightly matched, and the effect and efficiency of minimally invasive surgery can be effectively improved to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a power transfer mechanism and a rotary cutter for reciprocating rotational motion. Background Art

[0002] Compared with traditional open surgery, minimally invasive surgery has the advantages of less trauma, faster recovery and fewer complications. It is increasingly favored by doctors and patients, and medical devices used for minimally invasive surgery are also developing rapidly. In minimally invasive surgery, planing, rotary cutting, grinding and other operations are relatively common, and they all use instruments including a knife tube assembly and a power mechanism for driving the knife tube assembly. The knife tube assembly used in minimally invasive surgery usually includes an outer tube and an inner tube inserted inside the outer tube. The inner tube generally needs to rotate or reciprocate relative to the outer tube to achieve the effects of planing, rotary cutting, grinding and the like.

[0003] The power mechanism in existing minimally invasive surgical instruments must realize both the rotational movement and the reciprocating movement of the inner tube. Generally, a relatively complex structure is required to achieve this. The internal structural arrangement of the power mechanism is relatively complicated, and the reciprocating rotational movement of the inner tube is often affected by the loose coordination between the various structures, which affects the effect and efficiency of the minimally invasive surgery and increases the pain of the patient. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a power transfer mechanism and a rotary cutter for reciprocating rotation, which can effectively drive the inner knife tube to perform reciprocating rotation in the outer knife tube under the cooperation of various structural components and has a simple structure.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In a first aspect, the utility model provides a power transfer mechanism for reciprocating rotational motion, the power transfer mechanism is used to install a tool assembly and provide power for the tool assembly, the tool assembly includes an inner tool tube and an outer tool tube, the inner tool tube can perform reciprocating rotational motion in the outer tool tube, and the power transfer mechanism includes:

[0007] A reciprocating sleeve, used for fixed connection with the inner knife tube;

[0008] A reciprocating drive assembly, used for driving the reciprocating sleeve to perform reciprocating motion, wherein the reciprocating drive assembly is mounted on the reciprocating sleeve;

[0009] A connecting spindle is used to drive the reciprocating sleeve to rotate, the reciprocating sleeve is slidingly sleeved on the connecting spindle, and the inner knife tube is slidingly inserted in the connecting spindle;

[0010] A power transmission assembly is used to drive the connecting main shaft and the reciprocating drive assembly to rotate. The power transmission assembly includes a power input assembly, a rotational drive assembly and a reciprocating transmission assembly. Both the rotational drive assembly and the reciprocating transmission assembly are transmission-connected to the power input assembly. The rotational drive assembly is used to drive the connecting main shaft to rotate, and the reciprocating transmission assembly is used to drive the reciprocating drive assembly to rotate.

[0011] In combination with the first aspect, in some embodiments, one end of the connecting main shaft is a square end, the interior of the reciprocating sleeve has a square hole, and the reciprocating sleeve is slidably mounted on the square end through the square hole.

[0012] In combination with the first aspect, in some embodiments, the reciprocating drive assembly includes a steel ball cover, a steel ball and a conversion sleeve, the reciprocating sleeve is located in the steel ball cover and performs reciprocating rotational motion in the steel ball cover, the conversion sleeve fixed sleeve is arranged on the reciprocating transmission assembly, the conversion sleeve is fixedly inserted into the interior of one end of the steel ball cover, the steel ball is installed on the steel ball cover, and the rotation of the conversion sleeve drives the steel ball cover to rotate, thereby driving the steel ball to slide on the reciprocating sleeve to realize the reciprocating motion of the reciprocating sleeve.

[0013] In combination with the first aspect, in some embodiments, the outer wall of the reciprocating sleeve has an inclined spiral groove, the spiral groove is inclined along the axial direction of the reciprocating sleeve, the steel ball is slidably set in the spiral groove, and the steel ball slides in the spiral groove to drive the reciprocating sleeve to perform reciprocating motion.

[0014] In combination with the first aspect, in some embodiments, the reciprocating transmission assembly includes a first hollow rotating shaft and a first driven gear, the first driven gear is fixed on the first hollow rotating shaft, the conversion sleeve is fixedly mounted on the first hollow rotating shaft, and the first hollow rotating shaft is rotatably mounted on the connecting main shaft; the rotating drive assembly includes a second hollow rotating shaft and a second driven gear, the second driven gear is fixed on the second hollow rotating shaft, and the second hollow rotating shaft is fixedly mounted on the connecting main shaft.

[0015] In combination with the first aspect, in some embodiments, the power input assembly includes an input shaft, a driving gear and a triple gear, the driving gear is fixedly mounted on one end of the input shaft, the triple gear includes a left gear, an intermediate gear and a right gear coaxially arranged, the left gear is meshed with the first driven gear, the intermediate gear is meshed with the driving gear, the right gear is meshed with the second driven gear, the number of teeth of the left gear is less than the number of teeth of the right gear, and the number of teeth of the first driven gear and the second driven gear are the same.

[0016] In combination with the first aspect, in some embodiments, the power transfer mechanism also includes a housing and a reduction gearbox, the reduction gearbox is installed in the housing, the reduction gearbox includes a mounting plate and a mounting seat, the mounting plate is vertically mounted on the mounting seat, the input shaft passes through the mounting plate and a driving gear is installed on one side of the mounting plate, the triple gear is installed on the mounting plate, the reciprocating transmission assembly and the rotary drive assembly are both installed in the mounting seat, and the connecting main shaft is rotatably installed in the mounting seat.

[0017] In combination with the first aspect, in some embodiments, an outer tool seat is inserted into the end of the outer shell away from the reduction gear box, an adapter sleeve is installed on the outer side of the outer shell, the reciprocating drive assembly is located inside the outer tool seat, and a wear-resistant sleeve is installed between the outer tool seat and the steel ball cover.

[0018] In combination with the first aspect, in some embodiments, the connecting main shaft is connected to a suction pipe, the suction pipe is inserted into the mounting seat, and the interior of the connecting main shaft is communicated with the interior of the suction pipe.

[0019] In the second aspect, the utility model also discloses a rotary cutter, including the power conversion mechanism for reciprocating rotational motion described in the first aspect above, wherein the inner knife tube is fixedly inserted into the reciprocating sleeve, one end of the inner knife tube is slidably inserted into the connecting main shaft, and the inner knife tube is communicated with the interior of the connecting main shaft, and the outer knife tube is inserted into the outer knife seat through the conversion sleeve.

[0020] The power transfer mechanism for reciprocating rotational motion of the utility model utilizes a reciprocating sleeve to be fixedly connected with an inner knife tube, and drives the reciprocating sleeve to perform reciprocating rotational motion through a reciprocating drive assembly, thereby driving the inner knife tube to perform reciprocating rotational motion. The power transfer mechanism of the utility model utilizes a triple gear to transmit power, and utilizes a left gear and a right gear with different numbers of teeth in the triple gear to make the rotation speeds of the rotation drive assembly and the reciprocating transmission assembly different, thereby forming a differential speed. At the same time, the rotation of the reciprocating sleeve is realized by the rotation of the connecting main shaft, and the reciprocating motion of the reciprocating sleeve is realized by the rotation of the steel ball cover. Combined with the differential speed, the reciprocating sleeve can perform reciprocating rotational motion. The power transfer mechanism of the utility model has a simple structure, and the various structures cooperate closely, which can effectively improve the effect and efficiency of minimally invasive surgery to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic cross-sectional structural diagram of a power transfer mechanism for reciprocating rotational motion according to Embodiment 1;

[0022] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 It is an enlarged structural schematic diagram of the reciprocating sleeve;

[0024] Figure 4 It is an enlarged structural diagram of the steel ball cover;

[0025] Figure 5 It is a schematic diagram of the enlarged structure of the connecting spindle;

[0026] Figure 6 It is an enlarged structural diagram of a triple gear;

[0027] Figure 7 It is an enlarged structural diagram of the reduction box;

[0028] Figure 8 is a schematic cross-sectional structural diagram of the rotary cutter of Example 2;

[0029] Fig. 9 is a schematic diagram of the exploded structure of the rotary cutter of Example 2;

[0030] Fig.10 is a schematic structural diagram of the rotary cutter of Example 2;

[0031] Among them, the inner knife tube 110, the inner knife head 111, the outer knife tube 120, the outer knife head 121, the peeling window 1211, the reciprocating sleeve 200, the square hole 210, the spiral groove 220, the steel ball cover 310, the steel ball 320, the conversion sleeve 330, the connecting spindle 400, the square end 410, the step hole 420, the input shaft 511, the driving gear 512, the triple gear 513, the left gear 5131, the middle gear 5132, the right gear 5133, the third hollow shaft 5134, the spring 514, the fork joint 515, interface tube 516, pin shaft 517, rotary drive assembly 520, second hollow rotating shaft 521, second driven gear 522, reciprocating transmission assembly 530, first hollow rotating shaft 531, first driven gear 532, outer shell 600, outer tool holder 610, adapter sleeve 620, wear-resistant sleeve 630, reduction gear box 700, mounting plate 710, mounting seat 720, suction pipe 900, rotary valve 910, fixing block 920, fixing pin 930, suction joint 940, sealing ring 001, bearing 002. DETAILED DESCRIPTION

[0032] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0033] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] Example 1

[0035] Please refer to Figure 1-Figure 7 The present embodiment discloses a power transfer mechanism for reciprocating rotational motion, the power transfer mechanism is used to install a tool assembly and provide power for the tool assembly, the tool assembly includes an inner tool tube 110 and an outer tool tube 120, the inner tool tube 110 can perform reciprocating rotational motion in the outer tool tube 120. The power transfer mechanism of the present embodiment includes a reciprocating sleeve 200, a reciprocating drive assembly, a connecting spindle 400 and a power transmission assembly, the reciprocating sleeve 200 is used to be fixedly connected to the inner tool tube 110. The reciprocating drive assembly is used to drive the reciprocating sleeve 200 to perform reciprocating motion, and the reciprocating drive assembly is installed on the reciprocating sleeve 200. The connecting spindle 400 is used to drive the reciprocating sleeve 200 to perform rotational motion, the reciprocating sleeve 200 is slidably sleeved on the connecting spindle 400, and the inner tool tube 110 is slidably inserted in the connecting spindle 400. The power transmission assembly is used to drive the connecting main shaft 400 and the reciprocating drive assembly to rotate. The power transmission assembly includes a power input assembly, a rotational drive assembly 520 and a reciprocating transmission assembly 530. The rotational drive assembly 520 and the reciprocating transmission assembly 530 are both transmission-connected to the power input assembly. The rotational drive assembly 520 is used to drive the connecting main shaft 400 to rotate, and the reciprocating transmission assembly 530 is used to drive the reciprocating drive assembly to rotate.

[0036] In this embodiment, please refer to Figure 5One end of the connecting spindle 400 is a square end 410, the outer contour of the square end 410 is a square, the interior of the reciprocating sleeve 200 has a square hole 210, the square end 410 is adapted to the square hole 210, the square end 410 of the connecting spindle 400 is inserted into the square hole 210, and the reciprocating sleeve 200 is slidably sleeved on the square end 410 through the square hole 210. Inserting the square end 410 of the connecting spindle 400 into the square hole 210 can transfer the rotational motion of the connecting spindle 400 to the reciprocating sleeve 200, that is, when the connecting spindle 400 rotates, the reciprocating sleeve 200 will also rotate accordingly. The connecting spindle 400 is a hollow tubular structure. In order to achieve the matching connection between the connecting spindle 400 and the inner knife tube 110, the connecting spindle 400 has a stepped hole 420 inside. The stepped hole 420 is used to insert the inner knife tube 110. A sealing ring 001 is installed on the hole wall of the stepped hole 420. The sealing ring 001 is located at the end of the connecting spindle 400 that is connected to the inner knife tube 110. After the connecting spindle 400 is connected to the inner knife tube 110, the inner knife tube 110 can reciprocate in the connecting spindle 400.

[0037] In this embodiment, the reciprocating drive assembly includes a steel ball cover 310, a steel ball 320 and a conversion sleeve 330. The reciprocating sleeve 200 is located in the steel ball cover 310 and performs reciprocating rotational motion in the steel ball cover 310. The conversion sleeve 330 is fixedly mounted on the reciprocating transmission assembly 530. The conversion sleeve 330 is fixedly plugged into the interior of one end of the steel ball cover 310. The steel ball 320 is installed on the steel ball cover 310. The rotation of the conversion sleeve 330 drives the steel ball cover 310 to rotate, thereby driving the steel ball 320 to slide on the reciprocating sleeve 200 to realize the reciprocating motion of the reciprocating sleeve 200. Specifically, the outer wall of the reciprocating sleeve 200 has an inclined spiral groove 220, and the spiral groove 220 is inclined along the axial direction of the reciprocating sleeve 200. The steel ball 320 is slidably arranged in the spiral groove 220. The steel ball 320 slides in the spiral groove 220 to drive the reciprocating sleeve 200 to perform reciprocating motion.

[0038] In this embodiment, the reciprocating transmission assembly 530 includes a first hollow rotating shaft 531 and a first driven gear 532, the first driven gear 532 is fixed on the first hollow rotating shaft 531, the conversion sleeve 330 is fixedly sleeved on the first hollow rotating shaft 531, and the first hollow rotating shaft 531 is rotatably sleeved on the connecting main shaft 400. The rotation drive assembly 520 includes a second hollow rotating shaft 521 and a second driven gear 522, the second driven gear 522 is fixed on the second hollow rotating shaft 521, and the second hollow rotating shaft 521 is fixedly sleeved on the connecting main shaft 400. The first hollow rotating shaft 531 is rotatably sleeved on the connecting main shaft 400, so that the reciprocating transmission assembly 530 can perform rotational motion on the connecting main shaft 400, but the reciprocating transmission assembly 530 does not drive the connecting main shaft 400 to rotate when performing rotational motion. The second hollow rotating shaft 521 is fixedly sleeved on the connecting main shaft 400, and the rotation of the rotation drive assembly drives the connecting main shaft 400 to rotate.

[0039] In this embodiment, the power input assembly includes an input shaft 511, a driving gear 512 and a triple gear 513. The driving gear 512 is fixedly mounted on one end of the input shaft 511. Figure 6 The triple gear 513 includes a left gear 5131, an intermediate gear 5132 and a right gear 5133 which are coaxially arranged. The left gear 5131 meshes with the first driven gear 532, the intermediate gear 5132 meshes with the driving gear 512, and the right gear 5133 meshes with the second driven gear 522. In order to make the rotation speeds of the first driven gear 532 and the second driven gear 522 inconsistent when rotating simultaneously, and thus make the rotation speeds of the reciprocating sleeve 200 and the steel ball cover 310 inconsistent, forming a differential speed, the number of teeth of the left gear 5131 is set to be less than the number of teeth of the right gear 5133, the number of teeth of the first driven gear 532 and the second driven gear 522 are the same, and the number of teeth of the right gear 5133 is also less than the number of teeth of the second driven gear 522. The number of teeth of the driving gear 512 is less than the number of teeth of the intermediate gear 5132, so that the number of revolutions input from the input shaft 511 is greater than the rotation speeds of the first driven gear 532 and the second driven gear 522, thereby achieving the purpose of deceleration. Of course, the specific gear ratio can be reasonably adjusted by technicians in this field according to actual conditions, as long as the purpose of deceleration can be achieved.

[0040] In this embodiment, the power transfer mechanism further includes a housing 600 and a reduction box 700. The reduction box 700 is installed in the housing 600. Figure 7The reduction box 700 includes a mounting plate 710 and a mounting seat 720. The mounting plate 710 is vertically mounted on the mounting seat 720. The input shaft 511 passes through the mounting plate 710 and a driving gear 512 is mounted on one side of the mounting plate 710. A spring 514 is sleeved on the input shaft 511 at the other side of the mounting plate 710. A fork joint 515 is mounted on the end of the input shaft 511 away from the driving gear 512. The fork joint 515 has a male head that is connected to an external motor. An interface pipe 516 is sleeved on the input shaft 511. The spring 514 is located in the interface pipe 516. One end of the interface pipe 516 is plugged into the mounting plate 710. A bearing 002 is installed between the input shaft 511 and the interface pipe 516. The bearing 002 is close to the mounting plate 710.

[0041] The triple gear 513 is mounted on the mounting plate 710. Specifically, in the triple gear 513, the left gear 5131, the middle gear 5132 and the right gear 5133 are all coaxially fixed on the third hollow shaft 5134. A pin is inserted inside the third hollow shaft 5134. The third hollow shaft 5134 is rotatably sleeved on the pin 517. The pin 517 is fixedly mounted on the mounting plate 710. The middle gear 5132 is meshed with the driving gear 512. Under the rotation of the driving gear 512, the middle gear 5132 rotates, thereby driving the third hollow shaft to rotate, thereby driving the left gear 5131 and the right gear 5133 to rotate. The reciprocating transmission assembly 530 and the rotating drive assembly are both mounted in the mounting seat 720, and the connecting spindle 400 is rotatably mounted in the mounting seat 720.

[0042] In this embodiment, an outer blade holder 610 is inserted into one end of the housing 600 away from the reduction box 700, and an adapter sleeve 620 is installed on the outer side of the housing 600. The adapter sleeve 620 is sleeved on the outer blade tube 120. The reciprocating drive assembly is located in the outer blade holder 610, and a wear-resistant sleeve 630 is installed between the outer blade holder 610 and the steel ball cover 310.

[0043] The connecting spindle 400 is connected with a suction tube 900, which is inserted into the mounting seat 720, and the interior of the connecting spindle 400 is communicated with the interior of the suction tube 900. When the connecting spindle 400 is connected to the inner knife tube 110, the interior of the inner knife tube 110 is communicated with the interior of the connecting spindle 400, so that the tissue and liquid cut off from the surgical site can be sucked through the suction tube 900. A rotary valve 910 is installed on the pipeline connecting the connecting spindle 400 and the suction tube 900, and the rotary valve 910 is used to control the closing and unblocking of the suction channel. A fixed block 920 is fixed on the mounting seat 720 by a fixing pin 930, and the fixed block 920 is used to limit the position of the suction tube 900. The other end of the suction tube 900 is connected with a suction connector 940, and the suction connector 940 is used to connect an external negative pressure device.

[0044] In this embodiment, a bearing 002 is installed between the second hollow shaft 521 and the mounting seat 720, and between the first hollow shaft 531 and the mounting seat 720. A sealing ring 001 is also installed inside the mounting seat 720, and the sealing ring 001 is located at one end connected to the main shaft 400.

[0045] In the power transfer mechanism of this embodiment, the input shaft 511 is connected to the external motor through a fork joint. When the external motor is started, the input shaft 511 rotates, driving the driving gear 512 to rotate, and the driving gear 512 drives the triple gear 513 to rotate, and then the left gear 5131 and the right gear 5133 respectively drive the first driven gear 532 and the second driven gear 522 to rotate. Since the number of teeth of the left gear 5131 and the number of teeth of the right gear 5133 are different, the number of teeth of the first driven gear 532 and the second driven gear 522 are the same. Therefore, the rotation speeds of the first hollow rotating shaft 531 and the second hollow rotating shaft 521 must be different, and then the rotation speeds of the steel ball cover 310 and the connecting main shaft 400 are also different, so that the steel ball cover 310 and the connecting main shaft 400 form a differential speed. Under the setting of the square end 410 of the connecting main shaft 400, the rotation of the connecting main shaft 400 drives the reciprocating sleeve 200 to rotate, and the rotation of the steel ball cover 310 drives the steel ball to slide in the spiral groove, thereby driving the reciprocating sleeve 200 to perform reciprocating motion, thereby realizing the reciprocating rotation motion of the reciprocating sleeve 200, and then realizing the reciprocating rotation motion of the inner knife tube 110.

[0046] The power transfer mechanism of this embodiment has a simple structure and is easy to use. It is applicable to all cutting tools including an inner knife tube 110 and an outer knife tube 120, and the inner knife tube 110 needs to perform reciprocating rotational motion in the outer knife tube 120, and is thus assembled to form relevant surgical instruments.

[0047] Example 2

[0048] Please continue to refer to Figure 1-Figure 10This embodiment provides a rotary cutter, including the power transfer mechanism and tool assembly for reciprocating rotation of embodiment 1. The tool assembly includes an outer knife tube 120 and an inner knife tube 110. The inner knife tube 110 is inserted into the outer knife tube 120 and can perform reciprocating rotation in the outer knife tube 120. The inner knife tube 110 is fixedly inserted into the reciprocating sleeve 200. One end of the inner knife tube 110 is slidably inserted into the connecting spindle 400, and the inner knife tube 110 is connected to the inside of the connecting spindle 400. One end of the outer knife tube 120 passes through the adapter sleeve 620 and is inserted into the outer knife seat. The adapter sleeve 620 is sleeved on the outer knife tube 120. The other end of the inner blade tube 110 is connected to the inner blade head 111, and the other end of the outer blade tube 120 is connected to the outer blade head 121. The outer blade head 121 has a rotary cutting window 1211. The inner blade head 111 is rotatably arranged inside the outer blade head 121 and is located at a position corresponding to the rotary cutting window 1211. Under the action of the power transfer mechanism of Example 1, the inner blade tube 110 drives the inner blade head 111 to perform reciprocating rotational motion inside the outer blade head 121 to achieve the purpose of rotary cutting tissue.

[0049] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A power transfer mechanism for reciprocating rotational motion, the power transfer mechanism being used to install a tool assembly and provide power to the tool assembly, the tool assembly comprising an inner tool tube and an outer tool tube, the inner tool tube being capable of reciprocating rotational motion in the outer tool tube, characterized in that: The power transfer mechanism comprises: A reciprocating sleeve, used for fixed connection with the inner knife tube; A reciprocating drive assembly, used for driving the reciprocating sleeve to perform reciprocating motion, wherein the reciprocating drive assembly is mounted on the reciprocating sleeve; A connecting spindle is used to drive the reciprocating sleeve to rotate, the reciprocating sleeve is slidingly sleeved on the connecting spindle, and the inner knife tube is slidingly inserted in the connecting spindle; A power transmission assembly is used to drive the connecting main shaft and the reciprocating drive assembly to rotate. The power transmission assembly includes a power input assembly, a rotational drive assembly and a reciprocating transmission assembly. Both the rotational drive assembly and the reciprocating transmission assembly are transmission-connected to the power input assembly. The rotational drive assembly is used to drive the connecting main shaft to rotate, and the reciprocating transmission assembly is used to drive the reciprocating drive assembly to rotate.

2. The power transfer mechanism for reciprocating rotational motion according to claim 1, characterized in that: One end of the connecting main shaft is a square end, the interior of the reciprocating sleeve is provided with a square hole, and the reciprocating sleeve is slidably sleeved on the square end through the square hole.

3. The power transfer mechanism for reciprocating rotational motion according to claim 1, characterized in that: The reciprocating drive assembly includes a steel ball cover, a steel ball and a conversion sleeve. The reciprocating sleeve is located in the steel ball cover and performs reciprocating rotational motion in the steel ball cover. The conversion sleeve fixing sleeve is arranged on the reciprocating transmission assembly. The conversion sleeve is fixedly inserted into the interior of one end of the steel ball cover. The steel ball is installed on the steel ball cover. The rotation of the conversion sleeve drives the steel ball cover to rotate, and then drives the steel ball to slide on the reciprocating sleeve to realize the reciprocating motion of the reciprocating sleeve.

4. The power transfer mechanism for reciprocating rotational motion according to claim 3, characterized in that: The outer wall of the reciprocating sleeve is provided with an inclined spiral groove, the spiral groove is inclined along the axial direction of the reciprocating sleeve, the steel ball is slidably arranged in the spiral groove, and the steel ball slides in the spiral groove to drive the reciprocating sleeve to perform reciprocating motion.

5. The power transfer mechanism for reciprocating rotational motion according to claim 3, characterized in that: The reciprocating transmission assembly includes a first hollow rotating shaft and a first driven gear, the first driven gear is fixed on the first hollow rotating shaft, the conversion sleeve is fixedly mounted on the first hollow rotating shaft, and the first hollow rotating shaft is rotatably mounted on the connecting main shaft; the rotating drive assembly includes a second hollow rotating shaft and a second driven gear, the second driven gear is fixed on the second hollow rotating shaft, and the second hollow rotating shaft is fixedly mounted on the connecting main shaft.

6. The power transfer mechanism for reciprocating rotational motion according to claim 5, characterized in that: The power input assembly includes an input shaft, a driving gear and a triple gear. The driving gear is fixedly mounted on one end of the input shaft. The triple gear includes a left gear, an intermediate gear and a right gear that are coaxially arranged. The left gear is meshed with the first driven gear, the intermediate gear is meshed with the driving gear, and the right gear is meshed with the second driven gear. The number of teeth of the left gear is less than that of the right gear, and the number of teeth of the first driven gear and the second driven gear are the same.

7. The power transfer mechanism for reciprocating rotational motion according to claim 6, characterized in that: The power transfer mechanism also includes a shell and a reduction box, the reduction box is installed in the shell, the reduction box includes a mounting plate and a mounting seat, the mounting plate is vertically mounted on the mounting seat, the input shaft passes through the mounting plate and a driving gear is installed on one side of the mounting plate, the triple gear is installed on the mounting plate, the reciprocating transmission assembly and the rotating drive assembly are both installed in the mounting seat, and the connecting main shaft is rotatably installed in the mounting seat.

8. The power transfer mechanism for reciprocating rotational motion according to claim 7, characterized in that: An outer tool holder is inserted into one end of the shell away from the reduction box, an adapter sleeve is installed on the outer side of the shell, the reciprocating drive assembly is located in the outer tool holder, and a wear-resistant sleeve is installed between the outer tool holder and the steel ball cover.

9. The power transfer mechanism for reciprocating rotational motion according to claim 7, characterized in that: The connecting main shaft is connected with a suction pipe, the suction pipe is inserted in the mounting seat, and the interior of the connecting main shaft is communicated with the interior of the suction pipe.

10. A rotary cutter, characterized in that: The rotary cutter includes the power transfer mechanism and tool assembly described in any one of claims 1 to 9, the inner tool tube is fixedly inserted in the reciprocating sleeve, one end of the inner tool tube is slidably inserted in the connecting spindle, and the inner tool tube is communicated with the interior of the connecting spindle, and the outer tool tube is inserted in the outer tool seat through the adapter sleeve.

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