WO2024021655A1 - 医用磨削刀具及其动密封结构 - Google Patents

医用磨削刀具及其动密封结构 Download PDF

Info

Publication number
WO2024021655A1
WO2024021655A1 PCT/CN2023/084284 CN2023084284W WO2024021655A1 WO 2024021655 A1 WO2024021655 A1 WO 2024021655A1 CN 2023084284 W CN2023084284 W CN 2023084284W WO 2024021655 A1 WO2024021655 A1 WO 2024021655A1
Authority
WO
WIPO (PCT)
Prior art keywords
knife assembly
seal
ring
wall
grinding tool
Prior art date
Application number
PCT/CN2023/084284
Other languages
English (en)
French (fr)
Inventor
郭毅军
郭以宏
罗杰
Original Assignee
重庆西山科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 重庆西山科技股份有限公司 filed Critical 重庆西山科技股份有限公司
Publication of WO2024021655A1 publication Critical patent/WO2024021655A1/zh

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1671—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the spine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B2017/1602—Mills

Definitions

  • the present application relates to the technical field of medical devices, and in particular to a medical grinding tool and its dynamic sealing structure.
  • medical grinding tools such as minimally invasive spinal drills require continuous high-speed grinding of bone tissue in saline water with water pressure.
  • the inner cutter assembly drives the cutter head to rotate, thereby grinding the bone tissue.
  • foreign objects such as normal saline, blood or residue enter the handle through the gap between the inner knife assembly and the outer knife assembly, which may cause malfunctions and affect the normal operation.
  • a dynamic sealing structure of a medical grinding tool includes an outer knife assembly and an inner knife assembly rotatably disposed in the outer knife assembly.
  • Dynamic seal structure includes:
  • the bearing is arranged in the outer knife assembly, the bearing includes an inner ring and an outer ring that are rotationally connected, and the inner ring is sleeved on the outer wall of the inner knife assembly;
  • a first sealing member is disposed on the outer wall of the inner knife assembly and sealingly cooperates with the inner ring;
  • the second sealing member is sleeved on the outer side wall of the outer ring and sealingly cooperates with the outer knife assembly.
  • first seal and the second seal are disposed on the same side of the bearing.
  • first sealing member and the second sealing member are disposed on opposite sides of the bearing.
  • the first sealing member includes a first sealing portion and a second sealing portion connected to each other.
  • the first sealing portion is sleeved on the outer wall of the inner blade assembly and along the inner blade assembly.
  • the second sealing portion extends axially along the radial direction of the inner knife assembly and sealingly fits with one side of the inner ring.
  • the second sealing member includes a third sealing portion and a fourth sealing portion connected to each other.
  • the third sealing portion is sleeved on the outer wall of the outer ring and along the inner blade assembly. Extends axially and seals with the outer knife assembly
  • the fourth sealing portion extends along the radial direction of the inner knife assembly and sealingly cooperates with one side of the outer ring.
  • the dynamic sealing structure further includes a first axial limiter, the first axial limiter is disposed in the outer knife assembly and is movably connected with the outer knife assembly, and the The first axial stopper can reciprocate along the axial direction of the inner cutter assembly to adjust the axial preload force applied to the outer ring.
  • the inner side wall of the outer cutter assembly is provided with internal threads
  • the outer side wall of the first axial limiter is provided with external threads capable of cooperating with the internal threads.
  • the outer knife assembly includes an outer knife tube handle with an inner cavity, and the inner wall of the inner cavity is provided with a first installation groove for installing the second seal, and the inner knife
  • the assembly includes an inner cutter shank, which is rotatably arranged in the inner cavity.
  • the outer wall of the inner cutter shank is provided with a second mounting groove, and the first sealing member is sleeved on the inner cutter shank.
  • the outer side wall is arranged in the second mounting groove, and the inner ring is sleeved on the outer side wall of the inner tool holder.
  • a third sealing member is further included.
  • the third sealing member is disposed between the inner ring and the inner knife assembly.
  • the third sealing member seals the inner ring and the inner knife assembly. Gap between knife components.
  • a third installation groove for installing the third seal is provided on the outer wall of the inner knife assembly.
  • a fourth sealing member is further included, the fourth sealing member is disposed between the outer ring and the outer knife assembly, and the fourth sealing member seals the gap between the outer ring and the outer knife assembly. Clearance.
  • a fourth installation groove for installing the fourth seal is provided on the inner wall of the outer knife assembly.
  • a first connecting sleeve is further included.
  • the first connecting sleeve is sleeved on the outer wall of the inner knife assembly and sealingly cooperates with the inner blade assembly.
  • the inner ring is sleeved on the first connecting sleeve.
  • the first sealing member is arranged on the outer side wall of the first connecting sleeve and sealingly cooperates with the inner ring.
  • a dynamic sealing structure of a medical grinding tool in another aspect of the present application, includes an outer blade assembly and an inner blade assembly rotatably disposed in the outer blade assembly.
  • the dynamic sealing structure includes :
  • the bearing is arranged in the outer knife assembly, the bearing includes an inner ring and an outer ring that are rotationally connected, the inner ring is sleeved on the outer side wall of the inner knife assembly, the outer ring and the outer ring The inner wall of the knife assembly is directly sealed and matched;
  • a fifth sealing member is provided on the outer wall of the inner knife assembly and sealingly cooperates with the inner ring.
  • the inner cutter assembly includes an inner cutter shank and a second connecting sleeve.
  • the second connecting sleeve is sleeved on the outer wall of the inner cutter shank and sealingly fits with the inner cutter shank.
  • the trap is provided on the outer wall of the second connecting sleeve, the fifth sealing member is provided between the outer wall of the second connecting sleeve and the inner ring, and the inner ring and the second connecting sleeve All are sealingly matched with the fifth seal.
  • a dynamic sealing structure of a medical grinding tool includes The outer knife assembly and the inner knife assembly are rotatably arranged in the outer knife assembly.
  • the dynamic sealing structure includes:
  • the bearing is arranged in the outer knife assembly.
  • the bearing includes an inner ring and an outer ring that are rotationally connected.
  • the inner ring is sleeved on the outer wall of the inner knife assembly and is directly sealed with the inner knife assembly.
  • a fifth sealing member is sleeved on the outer wall of the outer ring and sealingly cooperates with the outer knife assembly.
  • a second connecting sleeve is further included.
  • the second connecting sleeve is sleeved on the outer wall of the inner knife assembly and sealingly cooperates with the inner blade assembly.
  • the inner ring is sleeved on the second connecting sleeve.
  • the outer wall of the sleeve is sealingly matched with the second connecting sleeve, the fifth sealing member is provided between the outer ring and the outer knife assembly, and the outer ring and the outer knife assembly are both connected with the outer ring.
  • the fifth seal is a sealing fit.
  • a sealing gasket is further included.
  • a limiting flange is provided on the side of the second connecting sleeve away from the cutter head.
  • the sealing gasket is sleeved on the outer wall of the second connecting sleeve and located on the limiting flange. Between the flange and the inner ring, the sealing gasket and the inner ring form an end face seal.
  • a second axial limiter is further included.
  • the second connecting sleeve is provided with a limit groove on one side close to the cutter head, and the second axial limiter is partially disposed on the limiter. in the slot and in conflicting fit with the inner ring.
  • a medical grinding tool including an outer knife assembly, an inner knife assembly and the dynamic sealing structure.
  • the dynamic sealing structure is used to connect the outer knife assembly with the inner knife. Components fit sealingly.
  • Figure 1 is a schematic structural diagram of a medical grinding tool according to an embodiment
  • Figure 2 is a cross-sectional view of the medical grinding tool A-A of Figure 1;
  • Figure 3 is a partial enlarged view of an embodiment of part B of the medical grinding tool of Figure 2;
  • Figure 4 is a partial enlarged view of another embodiment of part B of the medical grinding tool of Figure 2;
  • Figure 5 is a partial enlarged view of part B of the medical grinding tool of Figure 2 according to another embodiment
  • Figure 6 is a partial enlarged view of part B of the medical grinding tool of Figure 2 according to another embodiment
  • FIG. 7 is an exploded view of the medical grinding tool of FIG. 1 .
  • a medical grinding tool 10 which includes an outer knife assembly 100, an inner knife assembly 200, and is disposed between the outer knife assembly 100 and the inner knife assembly 200.
  • the dynamic sealing structure uses the dynamic sealing structure to seal the outer knife assembly 100 and the inner knife assembly 200, thereby preventing foreign objects such as physiological saline, blood or residue from entering through the gap between the inner knife assembly 200 and the outer knife assembly 100. In the handle, it can avoid malfunction and ensure the normal progress of the operation. In addition, the dynamic sealing structure will not affect the rotation of the inner knife assembly 200 relative to the outer knife assembly 100, and the bone tissue can be smoothly ground.
  • the outer blade assembly 100 may include an outer blade tube, a support tube, an outer blade tube handle body 110 and other components, which may serve as an external support structure.
  • the inner cutter assembly 200 may include an inner cutter bar 210, an inner cutter tube and other components, which may serve as a power transmission component to drive the cutter head 900 to rotate.
  • the inner knife assembly 200 is disposed inside the outer knife assembly 100, and the inner knife assembly 200 can rotate relative to the outer knife assembly 100, so that the inner knife assembly 200 drives the cutter head 900 to rotate.
  • a dynamic sealing structure including a bearing 300 , a first seal 400 and a second seal 500 .
  • the bearing 300 is disposed in the outer knife assembly 100, and the bearing 300 includes an inner ring 310 and an outer ring 320 that are sleeved and rotationally connected to each other. Moreover, the inner ring 310 is sleeved on the outer wall of the inner knife assembly 200, so that the inner ring 310 can rotate synchronously with the inner knife assembly 200.
  • the bearing 300 can be a waterproof bearing 300 with good waterproof effect.
  • the bearing 300 also includes balls or needle rollers located between the inner ring 310 and the outer ring 320. Since they belong to the prior art, they will not be described again here.
  • the first seal 400 is sleeved on the outer wall of the inner knife assembly 200, and the first seal 400 is sealingly matched with the inner ring 310, so that the first seal 400 can be used to seal the inner ring 310 and the inner knife assembly 200.
  • the gap between them is sealed to prevent foreign objects such as physiological saline, blood or residue from entering the handle through the gap.
  • the first seal 400 may be in the form of a sealing ring or a sealing sleeve, and may be made of medical silicone or medical rubber.
  • the second seal 500 is sleeved on the outer wall of the outer ring 320, and the second seal 500 is sealingly matched with the outer knife assembly 100, so that the second seal 500 can be used to seal the outer ring 320 and the outer knife assembly 100. Seal the gap between the handles to prevent foreign objects such as saline, blood or residue from entering the handle through the gap.
  • the second seal 500 may be in the form of a sealing ring or a sealing sleeve, and may be made of medical silicone or medical rubber.
  • the setting position of the dynamic sealing structure can be flexibly designed or adjusted according to the assembly conditions, etc., as long as it does not affect the rotation of the inner knife assembly 200 relative to the outer knife assembly 100, and can avoid physiological saline, blood or residue, etc.
  • the object can enter the handle through the gap between the inner knife assembly 200 and the outer knife assembly 100 .
  • the outer knife assembly 100 includes an outer knife tube handle 110 having an inner cavity.
  • the inner wall of the inner cavity is provided with a first hole for installing the second seal 500 .
  • the inner cutter assembly 200 includes an inner cutter shank 210 that is rotatably disposed in the inner cavity, and a second mounting groove is provided on the outer wall of the inner cutter shank 210 . In this way, the first seal 400 is sleeved on the outer wall of the inner cutter bar 210 and arranged in the second installation groove.
  • the inner ring 310 of the bearing 300 is placed on the outer wall of the inner tool bar 210, the inner ring 310 is sealingly matched with the first seal 400, so that the first seal 400 can be used to seal the inner ring 310 and the inner tool bar 210. Seal the gap between them.
  • the second sealing member 500 is sealingly matched with the inner wall of the inner cavity and is disposed in the first installation groove, so that the gap between the outer ring 320 and the outer knife tube handle body 110 can be sealed by the second sealing member 500 .
  • the inner knife assembly 200 can rotate smoothly relative to the outer knife assembly 100 and synchronously drive the inner ring 310 of the bearing 300 to rotate, and the outer ring 320 of the bearing 300, the first seal 400 and the second seal 500 remain stationary, so that neither the first seal 400 nor the second seal 500 will generate high-speed friction, and a good sealing effect can be ensured.
  • both the first sealing member 400 and the second sealing member 500 remain stationary relative to the outer blade assembly 100, conventional general-purpose medical materials can be used to save costs.
  • first seal 400 and the second seal 500 are used to respectively seal the gap between the inner ring 310 and the inner knife assembly 200 and the gap between the outer ring 320 and the outer knife assembly 100, which can effectively prevent physiological saline Foreign objects such as blood or residue enter the handle through this gap, which can avoid corrosion and rust on the inside of the handle, as well as prevent leakage, short circuit and other faults, ensuring the safety and normal operation of the operation.
  • first seal 400 and the second seal 500 can be disposed on the same side of the bearing 300, for example, the first seal 400 and the second seal 500 can be disposed on the left or right side of the bearing 300 at the same time, whereby, the gap between the inner knife assembly 200, the outer knife assembly 100 and the bearing 300 can be sealed from one side to avoid physiological saline, blood Or foreign objects such as debris enter the handle through the gap.
  • the first seal 400 and the second seal 500 can also be disposed on opposite sides of the bearing 300 .
  • the first seal 400 can be disposed on the left side of the bearing 300 Or the right side, correspondingly, the second seal 500 is provided on the right or left side of the bearing 300, so that the gaps between the inner knife assembly 200, the outer knife assembly 100 and the bearing 300 can be sealed from both sides to avoid Foreign objects such as physiological saline, blood or residue enter the handle through the gap.
  • the first seal 400 includes a first sealing part 410 and a second sealing part 420 that are connected to each other.
  • the first sealing part 410 may be provided in the form of a sealing sleeve or a sealing ring, and the first sealing part 410 is sleeved on the outer wall of the inner blade assembly 200 , and the A sealing portion 410 extends along the axial direction of the inner knife assembly 200, which can increase the contact area with the inner knife assembly 200 and ensure the sealing effect.
  • the second sealing part 420 may be provided in the form of a sealing gasket or the like. The second sealing part 420 extends along the radial direction of the inner knife assembly 200 , and the second sealing part 420 and one side of the inner ring 310 are mutually bonded to achieve sealing. Cooperation can increase the contact area with the inner ring 310 and ensure the sealing effect. This further enhances the sealing effect of the first seal 400 on the gap between the inner knife assembly 200 and the inner ring 310 .
  • the first sealing portion 410 is sleeved in the second mounting groove on the outer wall of the inner tool bar 210 and extends along the axial direction of the inner tool bar 210 , and the second sealing portion 420 protrudes from the second mounting groove. And extending along the radial direction of the inner cutter bar 210, the second sealing portion 420 is in contact with the left side wall of the inner ring 310 to achieve sealing fit.
  • the depth of the second installation groove may be the same as or slightly smaller than the thickness of the first sealing part 410 , so that the inner ring 310 can be sleeved on the outer wall of the inner tool bar 210 and connected with the first sealing part 410 .
  • Part 410 is sealed and fitted.
  • the second sealing member 500 includes a third sealing part 510 and a fourth sealing part 520 that are connected to each other.
  • the third sealing part 510 may be provided in the form of a sealing sleeve or a sealing ring, and the third sealing part 510 is sleeved on the outer side wall of the outer ring 320 , and the third sealing part 510 is The sealing portion 510 extends along the axial direction of the inner knife assembly 200 and sealingly cooperates with the outer knife assembly 100, thereby increasing the contact area with the outer knife assembly 100 and ensuring the sealing effect.
  • the fourth sealing part 520 may be provided in the form of a sealing gasket or the like.
  • the fourth sealing part 520 extends along the radial direction of the inner knife assembly 200, and the fourth sealing part 520 sealingly cooperates with one side of the outer ring 320, thereby increasing the The large contact area with the outer ring 320 ensures the sealing effect. This further enhances the sealing effect of the second seal 500 on the gap between the outer knife assembly 100 and the outer ring 320 .
  • the third sealing portion 510 is sleeved in the first mounting groove on the inner wall of the inner cavity and extends along the axial direction of the inner tool bar 210 , and the fourth sealing portion 520 protrudes from the first mounting groove and extends along the first mounting groove. Radial extension of inner tool bar 210, fourth seal The portion 520 is in contact with the right side wall of the outer ring 320 to achieve a sealing fit.
  • the depth of the first installation groove may be the same as or slightly smaller than the thickness of the third sealing part 510 so that the outer ring 320 can be installed in the inner cavity.
  • the dynamic sealing structure further includes a first axial limiter 600 .
  • the first axial limiting member 600 is used to axially limit the bearing 300 in the axial direction, ensuring that the bearing 300 will not move axially and ensuring a continuous and reliable sealing effect.
  • the first axial limiter 600 is disposed in the outer knife assembly 100 and is movably connected with the outer knife assembly 100, so that the first axial limiter 600 can reciprocate along the axial direction of the inner knife assembly 200. Movement, thereby adjusting the axial preload force applied to the outer ring 320, thereby limiting the position of the entire bearing 300, so that the outer ring 320 can stably and reliably seal with the second seal 500, and also make the inner ring 310 It can seal with the first seal 400 stably and reliably. Moreover, it will not affect the synchronous rotation of the inner ring 310 with the inner knife assembly 200 .
  • the movable connection between the first axial limiter 600 and the outer knife assembly 100 can be realized by a threaded connection or a plug-in fit, as long as the first axial limiter 600 can It is sufficient to adjust the axial preload force applied to the outer ring 320 by reciprocating the inner knife assembly 200 in the axial direction.
  • the inner side wall of the outer cutter assembly 100 is provided with internal threads
  • the outer side wall of the first axial limiter 600 is provided with external threads capable of mating with the internal threads. In this way, the combination of internal threads and external threads is used.
  • the threaded connection between the first axial limiter 600 and the outer knife assembly 100 is connected and fixed. By twisting the first axial limiter 600, the first axial limiter 600 can be made to move along the inner knife assembly 200. Move axially to adjust the resistance force exerted by the end of the first axial stopper 600 on the outer ring 320 .
  • the first axial limiting member 600 may be in the form of an end cap and may be disposed on a side of the outer cutter assembly 100 away from the cutter head 900 .
  • the dynamic sealing structure further includes a third seal 700 .
  • the third seal 700 is disposed between the inner ring 310 and the inner knife assembly 200, and the inner ring 310, the inner knife assembly 200 and the third seal 700 are The gap between the inner ring 310 and the inner knife assembly 200 is further sealed by the third seal 700 .
  • the third seal 700 is located between the first seal 400 and the second seal 500.
  • the third seal 700 can further strengthen the connection between the inner ring 310 and the inner knife assembly 200. sealing performance.
  • a third installation groove for installing the third seal 700 can be opened on the outer wall of the inner knife assembly 200 to prevent the third seal 700 from axial movement and ensure sealing performance.
  • the number of the third sealing member 700 can be flexibly designed or adjusted according to actual sealing needs, for example, it can be one, two or more.
  • the third seal 700 may be a sealing element such as an O-ring.
  • the dynamic sealing structure further includes a fourth seal 800 .
  • the fourth seal 800 is disposed between the outer ring 320 and the outer knife assembly 100, and the outer ring 320, the outer knife assembly 100 and the fourth seal 800 are The gap between the outer ring 320 and the outer knife assembly 100 is further sealed by the fourth seal 800 .
  • the fourth seal 800 is located between the first seal 400 and the second seal 500.
  • the fourth seal 800 can further strengthen the connection between the outer ring 320 and the outer knife assembly 100. sealing performance.
  • a fourth installation groove for installing the fourth seal 800 can be opened on the inner wall of the outer knife assembly 100 to avoid axial movement of the fourth seal 800 and ensure sealing performance.
  • the number of the fourth sealing member 800 can be flexibly designed or adjusted according to actual sealing needs, for example, it can be one, two or more.
  • the fourth seal 800 may be a sealing element such as an O-ring.
  • the dynamic sealing structure further includes a first connecting sleeve 1100 .
  • the first connecting sleeve 1100 is set on the outer wall of the inner knife assembly 200 and is sealed with the inner knife assembly 200 by welding or sealant bonding, so that the first connecting sleeve 1100 and the inner knife assembly 200 can be sealed. Seal the gap between the handles to prevent foreign objects such as saline, blood or residue from entering the handle through the gap.
  • the inner ring 310 is sleeved on the outer wall of the first connecting sleeve 1100
  • the first sealing member 400 is sleeved on the outer wall of the first connecting sleeve 1100 and sealingly fits with the inner ring 310 to achieve sealing fit, thereby utilizing the first sealing member 400.
  • the seal 400 can seal the gap between the inner ring 310 and the first connecting sleeve 1100 to prevent foreign objects such as physiological saline, blood or residue from entering the handle through the gap.
  • a dynamic sealing structure including the bearing and the fifth seal of any of the above embodiments.
  • the outer ring of the bearing and the inner wall of the outer knife assembly are welded, glued, etc.
  • the method is a direct sealing fit.
  • the inner cutter assembly includes an inner cutter shank and a second connecting sleeve.
  • the second connecting sleeve is set on the outer wall of the inner cutter shank and sealingly cooperates with the inner cutter shank.
  • the inner ring is set on the outer side wall of the second connecting sleeve.
  • the fifth sealing member is provided between the outer wall of the second connecting sleeve and the inner ring, and both the inner ring and the second connecting sleeve are sealingly matched with the fifth seal.
  • a dynamic sealing structure is also provided, including the bearing 300 and the fifth seal 1200 of any of the above embodiments.
  • the fifth seal 1200 is sleeved on the outer wall of the inner knife assembly 200 and sealingly cooperates with the inner ring 310, so that the fifth seal 1200 can be used to seal the gap between the inner ring 310 and the inner knife assembly 200 to avoid Foreign objects such as physiological saline, blood or residue enter the handle through this gap.
  • the fifth seal 1200 is sleeved on the outer wall of the outer ring 320 and sealingly cooperates with the outer knife assembly 100, so that the fifth seal 1200 can be used to seal the gap between the outer ring 320 and the outer knife assembly 100 to avoid physiological problems. Foreign objects such as salt water, blood or debris can enter the handle through this gap.
  • the fifth seal 1200 may be in the form of a sealing ring or a sealing sleeve, and may be made of medical silicone or medical rubber.
  • the dynamic sealing structure further includes a second connecting sleeve 1300 .
  • the second connecting sleeve 1300 is set on the outer wall of the inner knife assembly 200 and is sealed with the inner knife assembly 200 by welding or sealant bonding, so that the second connecting sleeve 1300 and the inner knife assembly 200 can be sealed.
  • the gap between the handles is sealed to prevent foreign objects such as physiological saline, blood or residue from entering the handle through the gap, and also allows the second connecting sleeve 1300 to rotate synchronously with the inner knife assembly 200.
  • the inner ring 310 is sleeved on the outer wall of the second connecting sleeve 1300 and is sealed with the second connecting sleeve 1300 by welding or sealant bonding, so that the inner ring 310 and the second connecting sleeve 1300 can be sealed.
  • the gap is sealed to prevent foreign objects such as physiological saline, blood or residue from entering the handle through the gap, and also allows the inner ring 310 to rotate synchronously with the second connecting sleeve 1300.
  • the fifth seal 1200 is disposed between the outer ring 320 and the outer knife assembly 100, and the outer ring 320 and the outer knife assembly 100 are sealingly matched with the fifth seal 1200, so that the outer ring 320 can be sealed by using the fifth seal 1200.
  • the gap between the handle and the outer blade assembly 100 is sealed to prevent foreign objects such as physiological saline, blood or residue from entering the handle through the gap.
  • the inner knife assembly 200, the second connecting sleeve 1300 and the inner ring 310 can smoothly rotate relative to the outer knife assembly 100, the outer ring 320 and the fifth seal 1200, that is, the outer ring 320 and the fifth seal 1200 of the bearing 300 can rotate smoothly. Keep still, so that the fifth seal 1200 will not generate high-speed friction, and a good sealing effect can be ensured.
  • since the fifth seal 1200 remains stationary relative to the outer blade assembly 100, conventional general-purpose medical materials can be used to save costs.
  • a fifth installation groove for installing the fifth seal 1200 can be provided on the inner wall of the inner cavity of the outer blade assembly 100, and the depth of the fifth installation groove can be slightly less than the thickness of the fifth seal 1200, so that the fifth seal 1200 can be sealed and fitted with the outer ring 320 after being installed in the fifth installation groove.
  • a step groove for installing the inner ring 310 may be formed on the outer wall of the second connecting sleeve 1300 .
  • the dynamic sealing structure also includes a sealing gasket 1400.
  • a limiting flange 1310 is provided on the side of the second connecting sleeve 1300 away from the cutter head.
  • the sealing gasket 1400 can be sleeved on the outer wall of the second connecting sleeve 1300 so that the sealing gasket 1400 is located between the limiting flange 1310 and the inner ring, so that the sealing gasket 1400 fits the end surface of the inner ring 310.
  • the sealing gasket 1400 and the inner ring 310 form an end face seal, thereby further ensuring the sealing effect between the inner ring 310 and the second connecting sleeve 1300 .
  • the dynamic sealing structure also includes a second axial limiter 1500.
  • the second connecting sleeve 1300 is provided with a limiting groove on one side close to the cutter head, and the second axial limiting member 1500 is partially disposed in the limiting groove and conflicts with the inner ring 310, so that the inner ring 310 is located on the second axis. between the stopper 1500 and the sealing washer 1400, thereby preventing the bearing 300 from axially moving on the second connecting sleeve 1300 and causing sealing failure, and also making the sealing washer 1400 and the end surface of the inner ring 310 fit more closely. Ensure end face sealing effect.
  • the second axial limiting member 1500 may be in the form of a clamp ring or a clamp.
  • a certain body and “a certain part” can be part of the corresponding “component”, that is, “a certain body” and “a certain part” are integrally formed with the “other parts of the component”; they can also be integrated with the “component”
  • An independent component that can be separated from “other parts”, that is, “a certain body” or “a certain part” can be manufactured independently, and then combined with “other parts of the component” to form a whole.
  • the expressions "a certain body” and “a certain part” mentioned above in this application are only one of the embodiments. They are for the convenience of reading and are not intended to limit the scope of protection of this application. As long as the above features are included and the functions are the same, it should be understood as The equivalent technical solution of this application.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
  • connection In this application, unless otherwise clearly stated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified limitations. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
  • a first feature "on” or “under” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • an element when an element is referred to as being “fixed to”, “disposed on”, “anchored to” or “mounted on” another element, it can be directly on the other element or intervening elements may also be present. . When an element is said to be “connected” to another element, it can be directly connected to the other element or there may also be intervening elements present. Furthermore, when one element is considered to be a "fixed transmission connection” to another element, the two can be fixed in a detachable connection, or they can be fixed in a non-detachable connection, as long as they can realize power transmission, such as socket and snap connection. , integrated molding fixation, welding, etc. can be realized in the existing technology, and will not be redundant here.
  • connection relationship or positional relationship of elements although not explicitly described, the connection relationship and positional relationship are interpreted to include an error range, which error range should be acceptable for a specific value determined by a person skilled in the art. within the deviation range. For example, “about,” “approximately,” or “substantially” may mean within one or more standard deviations, without limitation.

Abstract

本申请涉及一种医用磨削刀具(10)及其动密封结构，内刀组件(200)能够顺畅的相对外刀组件(100)转动并同步带动轴承(300)的内圈(310)转动，而轴承(300)的外圈(320)、第一密封件(400)以及第二密封件(500)均保持静止，从而使得第一密封件(400)和第二密封件(500)均不会产生高速摩擦，能够保证良好的密封效果。并且，由于第一密封件(400)和第二密封件(500)均相对外刀组件(100)保持静止，可选用常规的通用型医用材质，节省成本。而且，利用第一密封件(400)和第二密封件(500)分别对内圈(310)与内刀组件(200)之间的间隙以及外圈(320)与外刀组件(100)之间的间隙进行密封，能够有效的避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中，进而能够避免对手柄的内部造成腐蚀、锈蚀，也能避免发生漏电、短路等故障，保证手术的安全、正常进行。

Description

医用磨削刀具及其动密封结构
相关申请
本申请要求2022年07月29申请的，申请号为2022109106699，名称为“医用磨削刀具及其动密封结构”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及医疗器械技术领域，特别是涉及一种医用磨削刀具及其动密封结构。
背景技术
微创脊柱钻头等医用磨削刀具在使用过程中需要持续在带水压的生理盐水中进行高速磨削骨组织的手术操作。具体地，通过内刀组件带动刀头转动，从而对骨组织进行磨削。在进行手术时，生理盐水、血液或残渣等外物通过内刀组件与外刀组件之间的间隙进入到手柄中，易发生故障，影响手术的正常进行。
发明内容
根据本申请的各自实施例，一方面，提供了一种医用磨削刀具的动密封结构，所述医用磨削刀具包括外刀组件和可转动设置于外刀组件内的内刀组件，所述动密封结构包括：
轴承，所述轴承设置于所述外刀组件内，所述轴承包括转动连接的内圈及外圈，所述内圈套设于所述内刀组件的外侧壁；
第一密封件，所述第一密封件设置于所述内刀组件的外侧壁并与所述内圈密封配合；及
第二密封件，所述第二密封件套设于所述外圈的外侧壁并与所述外刀组件密封配合。
在一个实施例中，所述第一密封件及所述第二密封件设置于所述轴承的同一侧。
在一个实施例中，所述第一密封件及所述第二密封件设置于所述轴承相对的两侧。
在一个实施例中，所述第一密封件包括相互连接的第一密封部和第二密封部，所述第一密封部套设于所述内刀组件的外侧壁并沿所述内刀组件的轴向延伸，所述第二密封部沿所述内刀组件的径向延伸并与所述内圈的一侧密封配合。
在一个实施例中，所述第二密封件包括相互连接的第三密封部和第四密封部，所述第三密封部套设于所述外圈的外侧壁并沿所述内刀组件的轴向延伸且与所述外刀组件密封 配合，所述第四密封部沿所述内刀组件的径向延伸并与所述外圈的一侧密封配合。
在一个实施例中，所述动密封结构还包括第一轴向限位件，所述第一轴向限位件设置于所述外刀组件内并与所述外刀组件活动连接，所述第一轴向限位件能够沿所述内刀组件的轴向往复移动以调节施加至所述外圈的轴向预紧力。
在一个实施例中，所述外刀组件的内侧壁设有内螺纹，所述第一轴向限位件的外侧壁设有能够与所述内螺纹螺纹配合的外螺纹。
在一个实施例中，所述外刀组件包括具有内腔的外刀管柄体，所述内腔的内侧壁设有用于供所述第二密封件安装的第一安装槽，所述内刀组件包括内刀杆，所述内刀杆可转动设置于所述内腔内，所述内刀杆的外侧壁设有第二安装槽，所述第一密封件套设于所述内刀杆的外侧壁并设置于所述第二安装槽内，所述内圈套设于所述内刀杆的外侧壁。
在一个实施例中，还包括第三密封件，所述第三密封件设置于所述内圈与所述内刀组件之间，通过所述第三密封件密封所述内圈与所述内刀组件之间的间隙。
在一个实施例中，所述内刀组件的外侧壁上设置有用于供所述第三密封件安装的第三安装槽。
在一个实施例中，还包括第四密封件，所述第四密封件设置于所述外圈与所述外刀组件之间，通过第四密封件密封所述外圈与外刀组件之间的间隙。
在一个实施例中，所述外刀组件的内侧壁上设置有用于供所述第四密封件安装的第四安装槽。
在一个实施例中，还包括第一连接套，所述第一连接套套设于所述内刀组件的外侧壁并与所述内刀组件密封配合，所述内圈套设于所述第一连接套的外侧壁，所述第一密封件设置于所述第一连接套的外侧壁并与所述内圈密封配合。
本申请的另一方面，提供了一种医用磨削刀具的动密封结构，所述医用磨削刀具包括外刀组件和可转动设置于外刀组件内的内刀组件，所述动密封结构包括：
轴承，所述轴承设置于所述外刀组件内，所述轴承包括转动连接的内圈及外圈，所述内圈套设于所述内刀组件的外侧壁，所述外圈与所述外刀组件的内壁直接密封配合；
第五密封件，所述第五密封件设置于所述内刀组件的外侧壁并与所述内圈密封配合。
在一个实施例中，所述内刀组件包括内刀杆和第二连接套，所述第二连接套套设于所述内刀杆的外侧壁并与所述内刀杆密封配合，所述内圈套设于所述第二连接套的外侧壁，所述第五密封件设置于所述第二连接套的外侧壁与所述内圈之间，且所述内圈及所述第二连接套均与所述第五密封件密封配合。
本申请的再一方面，提供了一种医用磨削刀具的动密封结构，所述医用磨削刀具包括 外刀组件和可转动设置于外刀组件内的内刀组件，所述动密封结构包括：
轴承，所述轴承设置于所述外刀组件内，所述轴承包括转动连接的内圈及外圈，所述内圈套设于所述内刀组件的外侧壁并与所述内刀组件直接密封配合；
第五密封件，所述第五密封件套设于所述外圈的外侧壁并与所述外刀组件密封配合。
在一个实施例中，还包括第二连接套，所述第二连接套套设于所述内刀组件的外侧壁并与所述内刀组件密封配合，所述内圈套设于所述第二连接套的外侧壁并与所述第二连接套密封配合，所述第五密封件设置于所述外圈与所述外刀组件之间，且所述外圈及所述外刀组件均与所述第五密封件密封配合。
在一个实施例中，还包括密封垫圈，所述第二连接套背离刀头的一侧设有限位凸缘，所述密封垫圈套设于所述第二连接套的外侧壁并位于所述限位凸缘与所述内圈之间，使所述密封垫圈与所述内圈形成端面密封。
在一个实施例中，还包括第二轴向限位件，所述第二连接套靠近所述刀头的一侧设有限位槽，所述第二轴向限位件部分设置于所述限位槽内并与所述内圈抵触配合。
本申请的又一方面，提供了一种医用磨削刀具，包括外刀组件、内刀组件及所述的动密封结构，所述动密封结构用于使所述外刀组件与所述内刀组件密封配合。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例或传统技术中的技术方案，下面将对实施例或传统技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据公开的附图获得其他的附图。
图1为一个实施例的医用磨削刀具的结构示意图；
图2为图1的医用磨削刀具A-A的剖视图；
图3为图2的医用磨削刀具B部分一个实施例的局部放大图；
图4为图2的医用磨削刀具B部分另一个实施例的局部放大图；
图5为图2的医用磨削刀具B部分再一个实施例的局部放大图；
图6为图2的医用磨削刀具B部分又一个实施例的局部放大图；
图7为图1的医用磨削刀具的爆炸图。
附图标记：
10、医用磨削刀具；100、外刀组件；110、外刀管柄体；200、内刀组件；210、内刀杆；300、轴承；310、内圈；320、外圈；400、第一密封件；410、第一密封部；420、第二密封部；500、第二密封件；510、第三密封部；520、第四密封部；600、第一轴向限位 件；700、第三密封件；800、第四密封件；900、刀头；1100、第一连接套；1200、第五密封件；1300、第二连接套；1310、限位凸缘；1400、密封垫圈；1500、第二轴向限位件。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1及图2所示，在一个实施例中，提供了一种医用磨削刀具10，其包括外刀组件100、内刀组件200及设置于外刀组件100与内刀组件200之间的动密封结构，利用动密封结构使得外刀组件100与内刀组件200密封配合，从而能够避免生理盐水、血液或残渣等外物通过内刀组件200与外刀组件100之间的间隙进入到手柄中，进而能够避免发生故障，保证手术的正常进行。另外，动密封结构也不会影响内刀组件200相对外刀组件100进行转动，能够顺利的对骨组织进行磨削。
其中，外刀组件100可以包括外刀管、支撑管、外刀管柄体110等元件，可以作为外部支撑结构。
其中，内刀组件200可以包括内刀杆210、内刀管等元件，可以作为动力传输部件而带动刀头900转动。
其中，内刀组件200设置于外刀组件100内，并且，内刀组件200能够相对外刀组件100进行转动，从而利用内刀组件200带动刀头900转动。
如图3及图7所示，在一个实施例中，提供了一种动密封结构，包括轴承300、第一密封件400及第二密封件500。
其中，轴承300设置在外刀组件100内，并且，轴承300包括相互套接并转动连接的内圈310和外圈320。而且，内圈310套设于内刀组件200的外侧壁上，从而使得内圈310能够随内刀组件200同步转动。
其中，轴承300可以选用防水效果好的防水轴承300。
可以理解的是，轴承300还包括位于内圈310与外圈320之间的滚珠或滚针，由于其属于现有技术，在此不再赘述。
其中，第一密封件400套设于内刀组件200的外侧壁上，并且，第一密封件400与内圈310密封配合，从而利用第一密封件400能够对内圈310与内刀组件200之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。
在一个实施例中，第一密封件400可以为密封圈或密封套的形式，可以采取医用硅胶或医用橡胶等材质。
其中，第二密封件500套设于外圈320的外侧壁上，并且，第二密封件500与外刀组件100密封配合，从而利用第二密封件500能够对外圈320与外刀组件100之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。
在一个实施例中，第二密封件500可以为密封圈或密封套的形式，可以采取医用硅胶或医用橡胶等材质。
其中，动密封结构的设置位置可以根据装配条件等进行灵活的设计或调整，只需满足不会影响内刀组件200相对外刀组件100进行转动，并且，能够避免生理盐水、血液或残渣等外物通过内刀组件200与外刀组件100之间的间隙进入到手柄中即可。
如图3及图7所示，在一个实施例中，外刀组件100包括具有内腔的外刀管柄体110，内腔的内侧壁上设有用于供第二密封件500安装的第一安装槽。内刀组件200包括内刀杆210，内刀杆210可转动设置在内腔内，并且，内刀杆210的外侧壁上设有第二安装槽。如此，将第一密封件400套设在内刀杆210的外侧壁上并设置在第二安装槽内，将第二密封件500套设在轴承300的外圈320的外侧壁上后，将轴承300的内圈310套设在内刀杆210的外侧壁上时，使得内圈310与第一密封件400密封配合，从而利用第一密封件400能够对内圈310与内刀杆210之间的间隙进行密封。并且，使得第二密封件500与内腔的内侧壁密封配合并设置于第一安装槽内，从而利用第二密封件500能够对外圈320与外刀管柄体110之间的间隙进行密封。
上述实施例的动密封结构，内刀组件200能够顺畅的相对外刀组件100转动并同步带动轴承300的内圈310转动，而轴承300的外圈320、第一密封件400以及第二密封件500均保持静止，从而使得第一密封件400和第二密封件500均不会产生高速摩擦，能够保证良好的密封效果。并且，由于第一密封件400和第二密封件500均相对外刀组件100保持静止，可选用常规的通用型医用材质，节省成本。而且，利用第一密封件400和第二密封件500分别对内圈310与内刀组件200之间的间隙以及外圈320与外刀组件100之间的间隙进行密封，能够有效的避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中，进而能够避免对手柄的内部造成腐蚀、锈蚀，也能避免发生漏电、短路等故障，保证手术的安全、正常进行。
其中，可以将第一密封件400和第二密封件500设置在轴承300的同一侧，例如，可以同时将第一密封件400和第二密封件500设置在轴承300的左侧或右侧，从而能够从单侧对内刀组件200、外刀组件100及轴承300之间的间隙进行密封，避免生理盐水、血液 或残渣等外物通过间隙进入到手柄中。
如图3及图7所示，当然，还可以将第一密封件400和第二密封件500设置在轴承300相对的两侧，例如，可以将第一密封件400设置在轴承300的左侧或右侧，对应地，将第二密封件500设置在轴承300的右侧或左侧，从而能够从两侧对内刀组件200、外刀组件100及轴承300之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过间隙进入到手柄中。
如图3所示，为了保证密封效果，第一密封件400包括相互连接的第一密封部410和第二密封部420。
如图3所示，在一个实施例中，第一密封部410可以设置为密封套或密封圈等形式，并且，第一密封部410套设于内刀组件200的外侧壁上，而且，第一密封部410沿内刀组件200的轴向延伸，能够增大与内刀组件200的接触面积，保证密封效果。同时，第二密封部420可以设置为密封垫等形式，第二密封部420沿内刀组件200的径向延伸，并且，第二密封部420与内圈310的一侧相互贴合而实现密封配合，能够增大与内圈310的接触面积，保证密封效果。进而加强了第一密封件400对内刀组件200与内圈310之间的间隙的密封效果。
在一个实施例中，第一密封部410套设于内刀杆210的外侧壁上的第二安装槽内并沿内刀杆210的轴向延伸，第二密封部420凸出第二安装槽并沿内刀杆210的径向延伸，第二密封部420与内圈310的左侧壁贴合而实现密封配合。
其中，第二安装槽的深度可以与第一密封部410的厚度相同或略小于第一密封部410的厚度，使得内圈310能够套设在内刀杆210的外侧壁上并与第一密封部410密封贴合。
如图3所示，为了保证密封效果，第二密封件500包括相互连接的第三密封部510和第四密封部520。
如图3所示，在一个实施例中，第三密封部510可以设置为密封套或密封圈的形式，并且，第三密封部510套设于外圈320的外侧壁上，而且，第三密封部510沿内刀组件200的轴向延伸并与外刀组件100密封配合，从而能够增大与外刀组件100的接触面积，保证密封效果。同时，第四密封部520可以设置为密封垫等形式，第四密封部520沿内刀组件200的径向延伸，并且，第四密封部520与外圈320的一侧密封配合，从而能够增大与外圈320的接触面积，保证密封效果。进而加强了第二密封件500对外刀组件100与外圈320之间的间隙的密封效果。
在一个实施例中，第三密封部510套设于内腔的内侧壁上的第一安装槽内并沿内刀杆210的轴向延伸，第四密封部520凸出第一安装槽并沿内刀杆210的径向延伸，第四密封 部520与外圈320的右侧壁贴合而实现密封配合。
其中，第一安装槽的深度可以与第三密封部510的厚度相同或略小于第三密封部510的厚度，使得外圈320能够安装在内腔内。
如图3及图7所示，另外，为了避免轴承300在外刀组件100内发生轴向窜动而引起密封失效。在一个实施例中，动密封结构还包括第一轴向限位件600。如此，利用第一轴向限位件600在轴向上对轴承300进行轴向限位，保证轴承300不会发生轴向窜动，保证密封效果的持续、可靠。
在一个实施例中，第一轴向限位件600设置于外刀组件100内并与外刀组件100活动连接，从而使得第一轴向限位件600能够沿内刀组件200的轴向往复移动，进而能够调节施加至外圈320的轴向预紧力，从而能够对整个轴承300进行限位，使得外圈320能够稳定、可靠的与第二密封件500密封配合，也使得内圈310能够稳定、可靠的与第一密封件400密封配合。并且，也不会影响内圈310随内刀组件200同步转动。
其中，第一轴向限位件600与外刀组件100的活动连接，可以通过螺纹连接的方式实现，也可以通过插接配合的方式实现，只需满足使得第一轴向限位件600能够沿内刀组件200的轴向往复移动而调节施加至外圈320的轴向预紧力即可。
在一个实施例中，外刀组件100的内侧壁设有内螺纹，第一轴向限位件600的外侧壁设有能够与内螺纹螺纹配合的外螺纹，如此，利用内螺纹与外螺纹之间的螺纹连接实现第一轴向限位件600与外刀组件100的连接固定，通过拧动第一轴向限位件600即可使得第一轴向限位件600沿内刀组件200的轴向移动，从而调节第一轴向限位件600的端部施加至外圈320上的抵触力。
其中，第一轴向限位件600可以为端盖形式，可以设置于外刀组件100远离刀头900的一侧。
此外，为了加强密封效果。在一个实施例中，动密封结构还包括第三密封件700。
如图3及图7所示，在一个实施例中，第三密封件700设置于内圈310与内刀组件200之间，并且，内圈310及内刀组件200与第三密封件700均密封配合，从而通过第三密封件700进一步密封内圈310与内刀组件200之间的间隙。如此，沿内刀组件200的轴向，第三密封件700位于第一密封件400和第二密封件500之间，利用第三密封件700能够进一步加强内圈310与内刀组件200之间的密封性能。
其中，可以在内刀组件200的外侧壁上开设出供第三密封件700安装的第三安装槽，避免第三密封件700发生轴向窜动，保证密封性能。第三密封件700的数量可以根据实际密封需要进行灵活的设计或调整，例如可以为一个、两个或更多。
其中，第三密封件700可以为O型密封圈等密封元件。
此外，为了加强密封效果。在一个实施例中，动密封结构还包括第四密封件800。
如图3及图7所示，在一个实施例中，第四密封件800设置于外圈320与外刀组件100之间，并且，外圈320及外刀组件100与第四密封件800均密封配合，从而通过第四密封件800进一步密封外圈320与外刀组件100之间的间隙。如此，沿内刀组件200的轴向，第四密封件800位于第一密封件400和第二密封件500之间，利用第四密封件800能够进一步加强外圈320与外刀组件100之间的密封性能。
其中，可以在外刀组件100的内侧壁上开设出供第四密封件800安装的第四安装槽，避免第四密封件800发生轴向窜动，保证密封性能。第四密封件800的数量可以根据实际密封需要进行灵活的设计或调整，例如可以为一个、两个或更多。
其中，第四密封件800可以为O型密封圈等密封元件。
如图4所示，在一个实施例中，动密封结构还包括第一连接套1100。其中，第一连接套1100套设在内刀组件200的外侧壁并与内刀组件200采取焊接或密封胶粘接等方式实现密封配合，从而能够对第一连接套1100与内刀组件200之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。并且，内圈310套设于第一连接套1100的外侧壁，第一密封件400套设于第一连接套1100的外侧壁并与内圈310密封贴合而实现密封配合，从而利用第一密封件400能够对内圈310与第一连接套1100之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。
在一个实施例中(图中未示出)，提供了一种动密封结构，包括上述任意实施例的轴承及第五密封件，轴承的外圈与外刀组件的内壁通过焊接、胶粘等方式直接密封配合。内刀组件包括内刀杆和第二连接套，第二连接套套设于内刀杆的外侧壁并与内刀杆密封配合，内圈套设于第二连接套的外侧壁，第五密封件设置于第二连接套的外侧壁与内圈之间，且内圈及第二连接套均与第五密封件密封配合。
如图5所示，在另一个实施例中，还提供了一种动密封结构，包括上述任意实施例的轴承300及第五密封件1200。
其中，第五密封件1200套设于内刀组件200的外侧壁并与内圈310密封配合，从而利用第五密封件1200能够对内圈310与内刀组件200之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。或者，第五密封件1200套设于外圈320的外侧壁并与外刀组件100密封配合，从而利用第五密封件1200能够对外圈320与外刀组件100之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。
其中，第五密封件1200可以为密封圈或密封套的形式，可以采取医用硅胶或医用橡胶等材质。
如图5所示，在一个实施例中，该动密封结构还包括第二连接套1300。其中，第二连接套1300套设于内刀组件200的外侧壁并与内刀组件200采取焊接或密封胶粘接等方式实现密封配合，从而能够对第二连接套1300与内刀组件200之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中，也使得第二连接套1300能够随内刀组件200同步转动。并且，内圈310套设于第二连接套1300的外侧壁并与第二连接套1300采取焊接或密封胶粘接等方式实现密封配合，从而能够对内圈310与第二连接套1300之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中，也使得内圈310能够随第二连接套1300同步转动。而且，第五密封件1200设置于外圈320与外刀组件100之间，且外圈320及外刀组件100均与第五密封件1200密封配合，从而利用第五密封件1200能够对外圈320与外刀组件100之间的间隙进行密封，避免生理盐水、血液或残渣等外物通过该间隙进入到手柄中。同时，内刀组件200、第二连接套1300及内圈310能够顺畅的相对外刀组件100、外圈320及第五密封件1200转动，即轴承300的外圈320及第五密封件1200均保持静止，从而使得第五密封件1200不会产生高速摩擦，能够保证良好的密封效果。并且，由于第五密封件1200相对外刀组件100保持静止，可选用常规的通用型医用材质，节省成本。
其中，可以在外刀组件100的内腔的内侧壁上设置供第五密封件1200安装的第五安装槽，第五安装槽的深度可以略小于第五密封件1200的厚度，使得第五密封件1200安装在第五安装槽内后能够与外圈320密封贴合。第二连接套1300的外侧壁上可以形成供内圈310安装的台阶槽。
如图6所示，另外，动密封结构还包括密封垫圈1400。并且，第二连接套1300背离刀头的一侧设有限位凸缘1310。如此，可以将密封垫圈1400套设于第二连接套1300的外侧壁，并使得密封垫圈1400位于限位凸缘1310与内圈之间，进而使得密封垫圈1400贴合于内圈310的端面而使得密封垫圈1400与内圈310形成端面密封，从而能够进一步保证内圈310与第二连接套1300之间的密封效果。
如图6所示，此外，动密封结构还包括第二轴向限位件1500。其中，第二连接套1300靠近刀头的一侧设有限位槽，第二轴向限位件1500部分设置于限位槽内并与内圈310抵触配合，从而使得内圈310位于第二轴向限位件1500与密封垫圈1400之间，进而避免轴承300在第二连接套1300上发生轴向窜动而引起密封失效，也使得密封垫圈1400与内圈310的端面贴合的更加紧密，保证端面密封效果。
其中，第二轴向限位件1500可以为卡圈或卡箍的形式。
需要说明的是，“某体”、“某部”可以为对应“构件”的一部分，即“某体”、“某部”与该“构件的其他部分”一体成型制造；也可以与“构件的其他部分”可分离的一个独立的构件，即“某体”、“某部”可以独立制造，再与“构件的其他部分”组合成一个整体。本申请对上述“某体”、“某部”的表达，仅是其中一个实施例，为了方便阅读，而不是对本申请的保护的范围的限制，只要包含了上述特征且作用相同应当理解为是本申请等同的技术方案。
需要说明的是，本申请“单元”、“组件”、“机构”、“装置”所包含的构件亦可灵活进行组合，即可根据实际需要进行模块化生产，以方便进行模块化组装。本申请对上述构件的划分，仅是其中一个实施例，为了方便阅读，而不是对本申请的保护的范围的限制，只要包含了上述构件且作用相同应当理解是本申请等同的技术方案。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。本申请中使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”、“设置于”、“固设于”或“安设于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。进一步地，当一个元件被认为是“固定传动连接”另一个元件，二者可以是可拆卸连接方式的固定，也可以不可拆卸连接的固定，能够实现动力传递即可，如套接、卡接、一体成型固定、焊接等，在现有技术中可以实现，在此不再累赘。当元件与另一个元件相互垂直或近似垂直是指二者的理想状态是垂直，但是因制造及装配的影响，可以存在一定的垂直误差。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
还应当理解的是，在解释元件的连接关系或位置关系时，尽管没有明确描述，但连接关系和位置关系解释为包括误差范围，该误差范围应当由本领域技术人员所确定的特定值可接受的偏差范围内。例如，“大约”、“近似”或“基本上”可以意味着一个或多个标准偏差内，在此不作限定。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种医用磨削刀具的动密封结构，所述医用磨削刀具包括外刀组件和可转动设置于外刀组件内的内刀组件，其特征在于，所述动密封结构包括：
    轴承，所述轴承设置于所述外刀组件内，所述轴承包括转动连接的内圈及外圈，所述内圈套设于所述内刀组件的外侧壁；
    第一密封件，所述第一密封件设置于所述内刀组件的外侧壁并与所述内圈密封配合；及
    第二密封件，所述第二密封件套设于所述外圈的外侧壁并与所述外刀组件密封配合。
  2. 根据权利要求1所述的医用磨削刀具的动密封结构，其特征在于，所述第一密封件及所述第二密封件设置于所述轴承的同一侧。
  3. 根据权利要求1所述的医用磨削刀具的动密封结构，其特征在于，所述第一密封件及所述第二密封件设置于所述轴承相对的两侧。
  4. 根据权利要求1所述的医用磨削刀具的动密封结构，其特征在于，所述第一密封件包括相互连接的第一密封部和第二密封部，所述第一密封部套设于所述内刀组件的外侧壁并沿所述内刀组件的轴向延伸，所述第二密封部沿所述内刀组件的径向延伸并与所述内圈的一侧密封配合。
  5. 根据权利要求1所述的医用磨削刀具的动密封结构，其特征在于，所述第二密封件包括相互连接的第三密封部和第四密封部，所述第三密封部套设于所述外圈的外侧壁并沿所述内刀组件的轴向延伸且与所述外刀组件密封配合，所述第四密封部沿所述内刀组件的径向延伸并与所述外圈的一侧密封配合。
  6. 根据权利要求1至5任一项所述的医用磨削刀具的动密封结构，其特征在于，所述动密封结构还包括第一轴向限位件，所述第一轴向限位件设置于所述外刀组件内并与所述外刀组件活动连接，所述第一轴向限位件能够沿所述内刀组件的轴向往复移动以调节施加至所述外圈的轴向预紧力。
  7. 根据权利要求6所述的医用磨削刀具的动密封结构，其特征在于，所述外刀组件的内侧壁设有内螺纹，所述第一轴向限位件的外侧壁设有能够与所述内螺纹螺纹配合的外螺纹。
  8. 根据权利要求1至5任一项所述的医用磨削刀具的动密封结构，其特征在于，所述外刀组件包括具有内腔的外刀管柄体，所述内腔的内侧壁设有用于供所述第二密封件安装的第一安装槽，所述内刀组件包括内刀杆，所述内刀杆可转动设置于所述内腔内，所述 内刀杆的外侧壁设有第二安装槽，所述第一密封件套设于所述内刀杆的外侧壁并设置于所述第二安装槽内，所述内圈套设于所述内刀杆的外侧壁。
  9. 根据权利要求1至5任一项所述的医用磨削刀具的动密封结构，其特征在于，还包括第三密封件，所述第三密封件设置于所述内圈与所述内刀组件之间，通过所述第三密封件密封所述内圈与所述内刀组件之间的间隙。
  10. 根据权利要求9所述的医用磨削刀具的动密封结构，其特征在于，所述内刀组件的外侧壁上设置有用于供所述第三密封件安装的第三安装槽。
  11. 根据权利要求1至5任一项所述的医用磨削刀具的动密封结构，其特征在于，还包括第四密封件，所述第四密封件设置于所述外圈与所述外刀组件之间，通过第四密封件密封所述外圈与外刀组件之间的间隙。
  12. 根据权利要求11所述的医用磨削刀具的动密封结构，其特征在于，所述外刀组件的内侧壁上设置有用于供所述第四密封件安装的第四安装槽。
  13. 根据权利要求1至5任一项所述的医用磨削刀具的动密封结构，其特征在于，还包括第一连接套，所述第一连接套套设于所述内刀组件的外侧壁并与所述内刀组件密封配合，所述内圈套设于所述第一连接套的外侧壁，所述第一密封件设置于所述第一连接套的外侧壁并与所述内圈密封配合。
  14. 一种医用磨削刀具的动密封结构，所述医用磨削刀具包括外刀组件和可转动设置于外刀组件内的内刀组件，其特征在于，所述动密封结构包括：
    轴承，所述轴承设置于所述外刀组件内，所述轴承包括转动连接的内圈及外圈，所述内圈套设于所述内刀组件的外侧壁，所述外圈与所述外刀组件的内壁直接密封配合；
    第五密封件，所述第五密封件设置于所述内刀组件的外侧壁并与所述内圈密封配合。
  15. 根据权利要求14所述的医用磨削刀具的动密封结构，其特征在于，所述内刀组件包括内刀杆和第二连接套，所述第二连接套套设于所述内刀杆的外侧壁并与所述内刀杆密封配合，所述内圈套设于所述第二连接套的外侧壁，所述第五密封件设置于所述第二连接套的外侧壁与所述内圈之间，且所述内圈及所述第二连接套均与所述第五密封件密封配合。
  16. 一种医用磨削刀具的动密封结构，所述医用磨削刀具包括外刀组件和可转动设置于外刀组件内的内刀组件，其特征在于，所述动密封结构包括：
    轴承，所述轴承设置于所述外刀组件内，所述轴承包括转动连接的内圈及外圈，所述内圈套设于所述内刀组件的外侧壁并与所述内刀组件直接密封配合；
    第五密封件，所述第五密封件套设于所述外圈的外侧壁并与所述外刀组件密封配合。
  17. 根据权利要求16所述的医用磨削刀具的动密封结构，其特征在于，还包括第二连接套，所述第二连接套套设于所述内刀组件的外侧壁并与所述内刀组件密封配合，所述内圈套设于所述第二连接套的外侧壁并与所述第二连接套密封配合，所述第五密封件设置于所述外圈与所述外刀组件之间，且所述外圈及所述外刀组件均与所述第五密封件密封配合。
  18. 根据权利要求15或17所述的医用磨削刀具的动密封结构，其特征在于，还包括密封垫圈，所述第二连接套背离刀头的一侧设有限位凸缘，所述密封垫圈套设于所述第二连接套的外侧壁并位于所述限位凸缘与所述内圈之间，使所述密封垫圈与所述内圈形成端面密封。
  19. 根据权利要求18所述的医用磨削刀具的动密封结构，其特征在于，还包括第二轴向限位件，所述第二连接套靠近所述刀头的一侧设有限位槽，所述第二轴向限位件部分设置于所述限位槽内并与所述内圈抵触配合。
  20. 一种医用磨削刀具，其特征在于，包括外刀组件、内刀组件及如权利要求1至19任一项所述的动密封结构，所述动密封结构用于使所述外刀组件与所述内刀组件密封配合。
PCT/CN2023/084284 2022-07-29 2023-03-28 医用磨削刀具及其动密封结构 WO2024021655A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210910669.9A CN115068050A (zh) 2022-07-29 2022-07-29 医用磨削刀具及其动密封结构
CN202210910669.9 2022-07-29

Publications (1)

Publication Number Publication Date
WO2024021655A1 true WO2024021655A1 (zh) 2024-02-01

Family

ID=83242945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/084284 WO2024021655A1 (zh) 2022-07-29 2023-03-28 医用磨削刀具及其动密封结构

Country Status (2)

Country Link
CN (1) CN115068050A (zh)
WO (1) WO2024021655A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115068050A (zh) * 2022-07-29 2022-09-20 重庆西山科技股份有限公司 医用磨削刀具及其动密封结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1456130A (zh) * 2002-05-10 2003-11-19 株式会社莫利嗒制作所 牙科用切削装置
WO2016042579A2 (en) * 2014-09-18 2016-03-24 Veol Medical Technologies Pvt. Ltd. Biomedical device for harvesting grafts
CN113576626A (zh) * 2021-07-21 2021-11-02 英姿医疗科技(苏州)有限公司 一种刀管组件、刨削器和刨削系统
CN215960157U (zh) * 2021-07-28 2022-03-08 重庆西山科技股份有限公司 医用刀具的内外刀支撑结构
CN115068050A (zh) * 2022-07-29 2022-09-20 重庆西山科技股份有限公司 医用磨削刀具及其动密封结构

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194601B (en) * 1986-08-30 1990-04-25 William Hay Smith Rolling bearing assembly
US20050081499A1 (en) * 2003-10-17 2005-04-21 Capitol Stampings Corp. Spindle assembly
US8109956B2 (en) * 2008-03-07 2012-02-07 Medtronic Xomed, Inc. Systems and methods for surgical removal of tissue
CN204158449U (zh) * 2014-09-01 2015-02-18 重庆西山科技有限公司 可调窗口脊柱钻头
CN204698643U (zh) * 2015-03-31 2015-10-14 重庆西山科技有限公司 医用手术高速磨削动力手柄
WO2017071633A1 (zh) * 2015-10-30 2017-05-04 重庆西山科技股份有限公司 电凝型动力手柄、电凝型刨削刀具及刨削组件
CN211398619U (zh) * 2019-09-24 2020-09-01 张家港富瑞阀门有限公司 一种氢气用截止阀
CN216908056U (zh) * 2021-03-30 2022-07-08 重庆西山科技股份有限公司 内刀组件与外刀组件的连接结构及医用刀具
CN215384446U (zh) * 2021-07-27 2022-01-04 重庆西山科技股份有限公司 具有注水功能的医用刀具
CN215306459U (zh) * 2021-07-29 2021-12-28 重庆西山科技股份有限公司 医用磨钻刀具
CN114451963B (zh) * 2022-01-26 2023-11-28 重庆西山科技股份有限公司 防止负压流失的刨削刀具
CN217744521U (zh) * 2022-06-20 2022-11-08 安徽万维医疗科技有限公司 一种用于医用刨刀的密封结构
CN218943427U (zh) * 2022-07-29 2023-05-02 重庆西山科技股份有限公司 医用磨削刀具及其动密封结构
CN219289589U (zh) * 2022-09-30 2023-07-04 江苏邦士医疗科技有限公司 一种微创手术用可冷却磨钻

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1456130A (zh) * 2002-05-10 2003-11-19 株式会社莫利嗒制作所 牙科用切削装置
WO2016042579A2 (en) * 2014-09-18 2016-03-24 Veol Medical Technologies Pvt. Ltd. Biomedical device for harvesting grafts
CN113576626A (zh) * 2021-07-21 2021-11-02 英姿医疗科技(苏州)有限公司 一种刀管组件、刨削器和刨削系统
CN215960157U (zh) * 2021-07-28 2022-03-08 重庆西山科技股份有限公司 医用刀具的内外刀支撑结构
CN115068050A (zh) * 2022-07-29 2022-09-20 重庆西山科技股份有限公司 医用磨削刀具及其动密封结构

Also Published As

Publication number Publication date
CN115068050A (zh) 2022-09-20

Similar Documents

Publication Publication Date Title
WO2024021655A1 (zh) 医用磨削刀具及其动密封结构
JP2013056170A (ja) 手持ち式医療装置
CN103637834B (zh) 具有磁控预载力的切割工具
CN107405047A (zh) 管路控制装置
CN103261766A (zh) 一种电动阀
CN107374734B (zh) 传动组件、手术机器人的手术器械和手术机器人
CN206112333U (zh) 一种旋转接头
CN218943427U (zh) 医用磨削刀具及其动密封结构
CN212106518U (zh) 一种弹性紧固膨胀螺栓
CN108233601A (zh) 一种电动推杆的防水结构和电动推杆
CN211834689U (zh) 持针器的卡口结构及持针器控制组件
CN215213360U (zh) 一种高效抗震内冷钻杆
CN109719677A (zh) 一种随钻仪器的骨架拆装工具
CN211715789U (zh) 加密型浮球式截止阀
CN217685210U (zh) 驱动组件、抽油烟机
CN105849409B (zh) 偏心螺杆泵、销式铰链和用于制造销式铰链的方法
CN210602932U (zh) 一种热管及其封头
CN110081193B (zh) 一种衬塑调节阀
CN108113753B (zh) 一种手术机器人电凝钳连接装置
CN218943426U (zh) 医用磨削刀具及其密封结构
CN116999172B (zh) 具有滑动双重防水结构及夹具快换结构的末端执行器
CN207139863U (zh) 一种理发剪电机输出轴密封结构及其理发剪
CN216843571U (zh) 一种医用连接器、内窥镜及手术器械
CN216933513U (zh) 一种密封型后盖及牙科手机
US20100172768A1 (en) Oil Pump with Improved Structure

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23844873

Country of ref document: EP

Kind code of ref document: A1