Rotary reciprocating driving structure based on cutting tool

Abstract

The utility model relates to the technical field of driving structures of cutting tools, and discloses a rotary reciprocating driving structure based on a cutting tool, which is characterized by comprising a driver, a driving gear, a rotating shaft, a transmission shaft and a restorer, the driver is used for synchronously driving the driving gear and the rotating shaft to rotate, and the driving gear is meshed with the transmission shaft; the rotating shaft is provided with a rotating groove which is spirally arranged, the restorer comprises a resetting shell and a resetting block, the resetting block is embedded in the rotating groove and used for driving the transmission shaft to reciprocate, the driving gear is used for driving the transmission shaft to rotate, and the transmission shaft is used for being assembled with the cutter body. Therefore, the structure for realizing reciprocating motion and rotary motion is simple, the cost is low, and the reciprocating motion driving stability is higher through the matching of the reset block and the rotary groove, so that the reciprocating motion of the knife body is more stable, the surgical operation is guaranteed, and the safety is improved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of the driving structure of the cutting tool, and specifically, to a rotary reciprocating driving structure based on the cutting tool. Background Art

[0002] Hysteroscopic surgery refers to minimally invasive surgery performed with a hysteroscope, in which the diseased tissue is removed by a hysteroscopic tissue removal tool. The hysteroscopic tissue removal tool is handheld to facilitate the operation of minimally invasive surgery and improve surgical efficiency.

[0003] At present, hysteroscopic tissue resection tools have a rotating resection operation to meet the needs of performing surgeries at different positions. For example, a prior patent with publication number CN 111839674A discloses a hysteroscopic tissue resection device, including a transmission mechanism and a reciprocating mechanism, the reciprocating mechanism includes a push rod and a push block, a spring is provided on the side of the push block away from the push rod, the transmission mechanism includes a rotating gear set and a reciprocating gear set, the reciprocating gear set includes a reciprocating driving gear and a reciprocating driven gear, the rotating gear set includes a rotating driving gear and a rotating driven gear, a transmission shaft is provided on the driver, the reciprocating driving gear and the rotating driving gear are both provided on the transmission shaft, the reciprocating driven gear is provided on one side of the push rod to drive the push rod to rotate, and the rotating driven gear is provided between the push block and the spring.

[0004] In the prior art, the drive structure needs to coordinate more structures to realize the reciprocating and rotating motion of the inner knife, resulting in many components of the drive structure and high cost, and at the same time, the failure rate is also high; and the stability of the reciprocating motion of the inner knife is poor, resulting in insufficient smoothness of the reciprocating motion of the inner knife by realizing different positions of the inner knife through the different contact positions of the push rod and the cutting surface. Utility Model Content

[0005] The utility model aims to provide a rotary reciprocating drive structure based on a cutting tool, aiming to solve the problem of insufficient stability of the reciprocating motion of the inner knife in the prior art.

[0006] The utility model is implemented in this way. The rotary reciprocating drive structure based on the cutting tool includes a driver, a driving gear, a rotating shaft, a transmission shaft and a resetter. The driver is used to synchronously drive the driving gear and the rotating shaft to rotate, and the driving gear is meshed with the transmission shaft; the rotating shaft has a rotating groove, and the rotating groove is spirally arranged. The resetter includes a reset shell and a reset block, and the reset block is arranged inside the reset shell. The reset shell and the transmission shaft are assembled, and the reset block is embedded in the rotating groove. The reset block is used to drive the transmission shaft to reciprocate, the driving gear is used to drive the transmission shaft to rotate, and the transmission shaft is used to be assembled with the tool body.

[0007] Furthermore, the reset block includes a block body and a block column, the block body is arranged in a cylindrical shape and extends radially along the rotating shaft, the block column is arranged in a columnar shape, the inner end of the block column is butt-jointed with the block body, and the outer end of the block column is embedded with the rotating groove.

[0008] Furthermore, the block body has a block surface, and the inner end of the block column is arranged to be butted against the middle of the block surface; and the block surface is arranged to be in contact with the outer surface of the rotating shaft.

[0009] Furthermore, along the direction away from the rotation axis, the block surfaces are arranged in an arched arc shape.

[0010] Furthermore, the transmission shaft includes a transmission tooth portion and a transmission groove portion, the driving gear is meshed with the transmission tooth portion, the reset shell has a shell opening, and the transmission groove portion penetrates the reset shell through the shell opening; the transmission tooth portion and the transmission groove portion are butt-jointedly arranged along a straight line, the cross-section of the transmission tooth portion is larger than the diameter of the shell opening, and the end of the transmission groove portion forms a groove plate, and the groove plate is used to limit the reset shell from disengaging from the transmission groove portion.

[0011] Furthermore, the rotary reciprocating drive structure based on the cutting tool includes a locking plate, which is assembled to the transmission groove portion, and the locking plate and the transmission tooth portion clamp and position the reset shell, and the groove plate is used to limit the locking plate from detaching from the transmission groove portion.

[0012] Furthermore, the rotary reciprocating drive structure based on the cutting tool includes a lower stopper, the rotary shaft passes through the lower stopper, the lower stopper is fixedly arranged, and the lower stopper is used to limit the further movement of the reset shell in the axial direction.

[0013] Furthermore, the transmission shaft includes an upper stopper, the upper stopper is arranged correspondingly to the lower stopper, the upper stopper is fixedly arranged, and the upper stopper and the lower stopper are used to synchronously limit the reset shell from continuing to move in the axial direction.

[0014] Furthermore, the rotary reciprocating drive structure based on the cutting tool includes a fixing block, which is fixedly arranged, and the tool body and the transmission shaft are respectively embedded with the fixing blocks, and the fixing block is used to fix the tool body and the transmission shaft.

[0015] Furthermore, the knife body includes an outer knife and an inner knife, the outer knife and the inner knife are arranged in a sleeve arrangement, the inner knife and the transmission shaft are assembled, and the transmission shaft is used to drive the inner knife to reciprocate and rotate; the rotary reciprocating drive structure based on the cutting tool includes a knife fixing block, the knife fixing block is fixedly arranged, the outer knife is embedded in the knife fixing block, and the inner knife passes through the knife fixing block.

[0016] Compared with the prior art, the utility model provides a rotary reciprocating drive structure based on a cutting tool. When in use, the driver causes the driving gear and the rotating shaft to be arranged in rotation, and the driving gear drives the transmission shaft to be arranged in rotation to realize the rotary motion of the knife body; the rotation of the rotating shaft drives the transmission shaft to reciprocate through the resetter to realize the reciprocating motion of the knife body; in this way, the structure for realizing reciprocating motion and rotary motion is simple and low in cost, and through the cooperation of the reset block and the rotating groove, the stability of the driven reciprocating motion is stronger, thereby making the reciprocating motion of the knife body more stable, ensuring surgical operations and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the assembly of the rotary reciprocating drive structure based on the cutting tool provided by the utility model;

[0018] Figure 2 It is an exploded schematic diagram of a reset block and a rotating shaft of a rotary reciprocating drive structure based on a cutting tool provided by the utility model;

[0019] Figure 3 It is an enlarged schematic diagram of part A of the rotary reciprocating drive structure based on the cutting tool provided by the utility model;

[0020] Figure 4 It is a three-dimensional schematic diagram of a rotary reciprocating drive structure based on a cutting tool provided by the utility model;

[0021] Figure 5 It is an exploded schematic diagram of a rotary reciprocating drive structure based on a cutting tool provided by the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Reference Figure 1-5 As shown, it is a preferred embodiment provided by the utility model.

[0026] The rotary reciprocating drive structure based on the cutting tool includes a driver 1, a driving gear 2, a rotating shaft 3, a transmission shaft 4 and a resetter 5. The driver 1 is used to synchronously drive the driving gear 2 and the rotating shaft 3 to rotate, and the driving gear 2 is meshed with the transmission shaft 4; the rotating shaft 3 has a rotating groove 31, and the rotating groove 31 is arranged in a spiral shape. The resetter 5 includes a reset shell 52 and a reset block 51, and the reset block 51 is arranged inside the reset shell 52, and the reset shell 52 and the transmission shaft 4 are assembled. The reset block 51 is embedded with the rotating groove 31, and the reset block 51 is used to drive the transmission shaft 4 to reciprocate, the driving gear 2 is used to drive the transmission shaft 4 to rotate, and the transmission shaft 4 is used to be assembled with the tool body 6.

[0027] The above-mentioned rotary reciprocating drive structure based on the cutting tool, when in use, the driver 1 causes the driving gear 2 and the rotating shaft 3 to be arranged in rotation, and the driving gear 2 drives the transmission shaft 4 to be arranged in rotation, thereby realizing the rotational movement of the knife body 6; the rotation of the rotating shaft 3 drives the transmission shaft 4 to reciprocate through the resetter 5, thereby realizing the reciprocating movement of the knife body 6; in this way, the structure for realizing reciprocating and rotary motions is simple and low in cost, and through the cooperation of the reset block 51 and the rotating groove 31, the stability of the driven reciprocating motion is stronger, thereby making the reciprocating motion of the knife body 6 more stable, ensuring the surgical operation and improving safety.

[0028] The reset block 51 includes a block body 511 and a block column 512. The block body 511 is arranged in a cylindrical shape and extends radially along the rotating shaft 3. The block column 512 is arranged in a columnar shape. The inner end of the block column 512 is docked with the block body 511, and the outer end of the block column 512 is embedded with a rotating groove 31. In this way, the relative movement of the block column 512 and the rotating groove 31 is achieved through the rotation of the rotating shaft 3, thereby driving the reciprocating movement of the transmission shaft 4.

[0029] The block 511 has a block surface, and the inner end of the block column 512 is connected to the middle of the block surface; the block surface is in contact with the outer surface of the rotating shaft 3; the contact area between the block 511 and the rotating shaft 3 is increased, the movement stability of the block 511 is improved, and the reciprocating motion of the transmission shaft 4 is smoother.

[0030] Along the direction away from the rotating shaft 3 , the block surface is arranged in an arched arc shape, which increases the contact area between the block 511 and the rotating shaft 3 , improves the moving stability of the block 511 , and makes the reciprocating motion of the transmission shaft 4 more stable.

[0031] The transmission shaft 4 includes a transmission tooth portion 42 and a transmission groove portion 43. The driving gear 2 is meshed with the transmission tooth portion 42. The reset shell 52 has a shell opening. The transmission groove portion 43 penetrates the reset shell 52 through the shell opening. Under the action of the transmission groove portion 43, the assembly between the reset shell 52 and the transmission shaft 4 is achieved.

[0032] The transmission tooth portion 42 and the transmission groove portion 43 are arranged in a straight line and are butt-jointed. The cross-section of the transmission tooth portion 42 is larger than the diameter of the shell opening. The end of the transmission groove portion 43 forms a groove plate, which is used to limit the reset shell 52 from being separated from the transmission groove portion 43, thereby ensuring the assembly stability between the reset shell 52 and the transmission shaft 4.

[0033] The rotary reciprocating drive structure based on the cutting tool includes a locking plate 44, which is assembled to the transmission groove portion 43. The locking plate 44 and the transmission tooth portion 42 clamp and position the reset shell 52, and the groove plate is used to limit the locking plate 44 from disengaging from the transmission groove portion 43; under the action of the locking plate 44, the reset shell 52 is limited from moving accidentally, thereby ensuring the assembly stability between the reset shell 52 and the transmission shaft 4.

[0034] At the same time, the locking piece 44 plays a locking role, so that the reset shell 52 and the transmission shaft 4 are relatively fixedly arranged, thereby realizing power transmission and driving the transmission shaft 4 to reciprocate.

[0035] The rotary reciprocating drive structure based on the cutting tool includes a lower stopper 32, the rotating shaft 3 passes through the lower stopper 32, the lower stopper 32 is fixedly arranged, and the lower stopper 32 is used to limit the further axial movement of the reset shell 52; under the action of the lower stopper 32, the inward movement of the reset shell 52 is positioned, and the absolute position of the movement of the reset shell 52 is determined, so as to avoid excessive movement force of the reset shell 52, avoid causing the block column 512 to fall off the rotating groove 31, and ensure the transmission of the driving force.

[0036] The transmission shaft 4 includes an upper stop 41, which is arranged correspondingly to the lower stop 32. The upper stop 41 is fixedly arranged, and the upper stop 41 and the lower stop 32 are used to synchronously limit the further axial movement of the reset shell 52; under the action of the upper stop 41, the inward movement of the reset shell 52 is positioned, and the absolute limit position of the movement of the reset shell 52 is determined, so as to avoid excessive moving force of the reset shell 52, avoid causing the block column 512 to fall off the rotating groove 31, and ensure the transmission of the driving force.

[0037] Furthermore, under the cooperation of the upper stopper 41 and the lower stopper 32 , the reset shell 52 is restrained synchronously, the restraining force is increased, and the stopping stability of the reset shell 52 is ensured to avoid shaking during the stopping movement.

[0038] The rotary reciprocating drive structure based on the cutting tool includes a fixed block 7, which is fixedly arranged. The knife body 6 and the transmission shaft 4 are respectively embedded with the fixed blocks 7, and the fixed block 7 is used to fix the knife body 6 and the transmission shaft 4; under the action of the fixed block 7, the assembly of the knife body 6 and the transmission shaft 4 is realized, and the transmission shaft 4 controls the rotary motion and reciprocating motion of the knife body 6.

[0039] The fixing screw passes through the fixing block 7 and penetrates the cutter body 6 to fix the cutter body 6 and to enable the cutter body 6 to be disassembled and replaced.

[0040] The knife body 6 includes an outer knife and an inner knife. The outer knife and the inner knife are arranged in a sleeve arrangement. The inner knife and the transmission shaft 4 are assembled. The transmission shaft 4 is used to drive the inner knife to reciprocate and rotate to achieve surgical operations.

[0041] The inner knife is hollow and has a negative pressure device connected to one side of the inner knife. Therefore, the fibroids and polyps will be sucked from the opening to the inside of the outer knife due to the negative pressure. Then, through the reciprocating motion of the inner knife, the inner knife will remove the fibroids and polyps adsorbed to the inside of the outer tube, and the removed tissue will be transmitted out. After the removal is completed, the device is closed and the outer and inner knives are taken out.

[0042] The rotary reciprocating drive structure based on the cutting tool includes a tool fixing block 8, which is fixedly arranged, the outer tool is embedded in the tool fixing block 8, and the inner tool passes through the tool fixing block 8; under the action of the tool fixing block 8, the outer tool is assembled and fixed.

[0043] The driver 1 may be a motor, through which the driving force is applied.

[0044] The driver 1 can be connected to an external power source, or it can be powered by a built-in battery.

[0045] The rotary reciprocating drive structure based on the cutting tool includes a middle solid block 9, which is arranged between the fixing block 7 and the knife fixing block 8, and the inner knife runs through the middle solid block 9; in this way, under the action of the middle solid block 9, the inner knife is supported and reinforced, the bearing capacity of the inner knife is enhanced, the service life of the inner knife is increased, and the stability of the use of the inner knife is improved.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary reciprocating drive structure based on a cutting tool, characterized in that: It includes a driver, a driving gear, a rotating shaft, a transmission shaft and a resetter, wherein the driver is used to synchronously drive the driving gear and the rotating shaft to rotate, and the driving gear is meshed with the transmission shaft; the rotating shaft has a rotating groove, and the rotating groove is spirally arranged; the resetter includes a reset shell and a reset block, and the reset block is arranged inside the reset shell, and the reset shell and the transmission shaft are assembled, and the reset block is embedded in the rotating groove, and the reset block is used to drive the transmission shaft to reciprocate, and the driving gear is used to drive the transmission shaft to rotate, and the transmission shaft is used to be assembled with the cutter body.

2. The rotary reciprocating drive structure based on the cutting tool according to claim 1, characterized in that: The reset block includes a block body and a block column. The block body is arranged in a cylindrical shape and extends radially along the rotating shaft. The block column is arranged in a columnar shape. The inner end of the block column is butt-jointed with the block body, and the outer end of the block column is embedded with the rotating groove.

3. The rotary reciprocating drive structure based on the cutting tool according to claim 2, characterized in that: The block body has a block surface, the inner end of the block column is butted against the middle of the block surface; and the block surface is butted against the outer surface of the rotating shaft.

4. The rotary reciprocating drive structure based on the cutting tool according to claim 3, characterized in that: Along the direction away from the rotation axis, the block surface is arranged in an arched arc shape.

5. The rotary reciprocating drive structure based on a cutting tool according to any one of claims 1 to 4, characterized in that: The transmission shaft includes a transmission tooth portion and a transmission groove portion, the driving gear is meshed with the transmission tooth portion, the reset shell has a shell opening, and the transmission groove portion penetrates the reset shell through the shell opening; the transmission tooth portion and the transmission groove portion are butt-jointedly arranged along a straight line, the cross-section of the transmission tooth portion is larger than the diameter of the shell opening, and a groove plate is formed at the end of the transmission groove portion, and the groove plate is used to limit the reset shell from being separated from the transmission groove portion.

6. The rotary reciprocating drive structure based on the cutting tool according to claim 5, characterized in that: The rotary reciprocating drive structure based on the cutting tool includes a locking plate, which is assembled to the transmission groove portion. The locking plate and the transmission tooth portion clamp and position the reset shell, and the groove plate is used to limit the locking plate from being separated from the transmission groove portion.

7. The rotary reciprocating drive structure based on a cutting tool according to any one of claims 1 to 4, characterized in that: The rotary reciprocating drive structure based on the cutting tool comprises a lower stopper, the rotary shaft passes through the lower stopper, the lower stopper is fixedly arranged, and the lower stopper is used to limit the further movement of the reset shell in the axial direction.

8. The rotary reciprocating drive structure based on the cutting tool according to claim 7, characterized in that: The transmission shaft comprises an upper stopper, the upper stopper is arranged correspondingly to the lower stopper, the upper stopper is fixedly arranged, and the upper stopper and the lower stopper are used to synchronously limit the reset shell from continuing to move in the axial direction.

9. The rotary reciprocating drive structure based on a cutting tool according to any one of claims 1 to 4, characterized in that: The rotary reciprocating drive structure based on the cutting tool includes a fixing block, which is fixedly arranged, and the tool body and the transmission shaft are respectively embedded with the fixing blocks, and the fixing block is used to fix the tool body and the transmission shaft.

10. The rotary reciprocating drive structure based on a cutting tool according to any one of claims 1 to 4, characterized in that: The knife body includes an outer knife and an inner knife, the outer knife and the inner knife are arranged in a sleeve arrangement, the inner knife and the transmission shaft are assembled, and the transmission shaft is used to drive the inner knife to reciprocate and rotate; the rotary reciprocating drive structure based on the cutting tool includes a knife fixing block, the knife fixing block is fixedly arranged, the outer knife is embedded in the knife fixing block, and the inner knife passes through the knife fixing block.

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