Planing cutter

Abstract

The present invention provides a planing cutter, comprising a cutter tube assembly. The cutter tube assembly comprises an inner cutter tube and an outer cutter tube, and the inner cutter tube can rotate relative to the outer cutter tube. In the present application, the cutter tube assembly, a power assembly, a negative-pressure suction assembly, and a water injection assembly are integrated in a housing to form an integrated structure, which requires no additional handles, thus facilitating cleaning and maintenance. The cutter tube assembly can be driven by the power assembly to rotate to perform planing operation on a target position of a patient; the negative-pressure suction assembly can suck out fragmented tissues generated by the planing. The water injection assembly can inject a liquid to the target position of the patient. The integration of multiple functions on the planing cutter of the integrated structure provides good adaptation to more working situations. The contact surface of a transverse mounting part of a mounting base with a motor is configured into a concave arc surface, so as to increase the contact area between the motor and the transverse mounting part of the mounting base and thereby improve the cooling effect on the motor.

Description

Planing tools Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to a planing tool. Background Art

[0002] In spinal surgery, orthopedics, and neurosurgery, rotational planing and grinding are required to remove diseased bone tissue and open internal channels. Traditionally, the outer blade of a medical planer tool is fixed to a drive handle. The drive handle drives the inner blade to rotate at a high frequency relative to its own axis, causing the inner blade to rotate relative to the outer blade to remove cartilage tissue.

[0003] A Chinese patent application, published under the publication number CN116269661A, discloses a medical soft tissue planing blade assembly comprising a blade assembly, a reducer assembly, an outer housing, a suction device, and an interface. The blade assembly comprises a hollow outer blade assembly and an inner blade assembly, and the suction device includes a negative pressure suction tube that communicates with the cavity of the inner blade assembly. While this medical soft tissue planing blade assembly separates the blade assembly from the driver, altering the path of the negative pressure suction tube, effectively protecting the motor from damage, it suffers from poor cooling and prevents active water injection into the working area.

[0004] The Chinese patent application document with the existing publication number CN116370036A discloses a medical soft tissue planing tool, including a planing blade assembly, a reducer assembly, an outer shell, a motor, and a suction device. The planing blade assembly includes a hollow outer blade assembly and an inner blade assembly, the inner blade assembly being mounted within the outer blade assembly, the reducer assembly being fixed within the outer shell, the reducer assembly including a reducer housing and a transmission gear set, the other end of the outer blade assembly being connected to the reducer housing, the transmission gear set being respectively connected to the other end of the inner blade assembly and the output end of the motor, and the suction device including a suction valve and a suction tube. The reducer assembly drives the planing blade assembly to rotate back and forth, and uses the suction device to aspirate the soft tissue. An adjustment device is also provided to adjust the suction state, making it more suitable for specific surgical operating environments. However, the cooling effect is poor, and water cannot be actively injected into the working position.

[0005] The existing Chinese patent application document with publication number CN221205577U discloses a planing handle, comprising a handle with a motor mounted thereon, and a male connector for a wiring harness connected to the handle. A tool identification device is provided at one end of the handle, and a buckle is provided at the other end. A water pipe groove is provided on the handle at a position corresponding to the position between the tool identification device and the buckle. The tool identification device facilitates identification of tool information and improves efficiency of use. The buckle facilitates connection to a housing with a tool mounted thereon, and the water pipe groove facilitates heat dissipation from the handle. The structure is simple, compact, and easy to use. However, the split structure is inconvenient to clean and has poor cooling effect.

[0006] A Chinese patent application, published under the publication number CN221469949U, discloses a planer head assembly and a planer. The head assembly comprises an outer cutter head and an inner cutter head. The outer cutter head is provided with an outer planing window, and the inner cutter head is provided with an inner planing window. The outer planing window is provided with outer planing teeth, and the inner planing window is provided with inner planing teeth. The inner planing teeth comprise a first inner tooth edge, a first outer tooth edge, and a first tooth top intersection line, wherein the inner vertex of the first tooth top intersection line is lower than the outer vertex. The outer planing teeth comprise a second inner tooth edge, a second outer tooth edge, and a second tooth top intersection line, wherein the inner vertex of the second tooth top intersection line is higher than the outer vertex. The planer also comprises an inner tube, an outer tube, and a handle. The handle houses a power mechanism for rotating the inner tube and a front adapter sleeve, and the outer tube is fixedly connected to the front adapter sleeve. The inner tube is fixedly connected to the inner cutter head, and the outer tube is fixedly connected to the outer cutter head. This planer head assembly facilitates tissue cutting and improves surgical efficiency. However, the cooling effect is poor.

[0007] At present, the market is in urgent need of an integrated planing tool with good cooling effect and the ability to actively inject water into the working position. Summary of the Invention

[0008] In view of the defects in the prior art, an object of the present invention is to provide a planing tool.

[0009] A planing tool provided according to the present invention includes a blade tube assembly, wherein the blade tube assembly includes an inner blade tube and an outer blade tube, and the inner blade tube is rotatable relative to the outer blade tube.

[0010] Preferably, it also includes a housing, a power component, and a negative pressure suction component;

[0011] The power assembly is arranged in the housing, one end of the knife tube assembly extends into the interior of the housing, the outer knife tube is fixedly connected to the housing, and the inner knife tube is transmission-connected to the output end of the power assembly;

[0012] One end of the negative pressure suction component extends into the interior of the shell and is communicated with the cavity of the inner knife tube, and the other end of the negative pressure suction component extends from the shell.

[0013] Preferably, it also includes a water injection assembly, wherein the end of the knife tube assembly away from the shell has a water outlet, a water injection gap is formed between the inner wall of the outer knife tube and the outer wall of the inner knife tube, and the water injection gap is connected to the water outlet, one end of the water injection assembly extends into the shell and is connected to the water injection gap between the outer knife tube and the inner knife tube, and the other end of the water injection assembly extends from the shell.

[0014] Preferably, the power assembly includes a mounting base, a motor, and a gear speed change structure, wherein the mounting base is fixedly mounted in the housing, the motor is placed on the horizontal mounting portion of the mounting base, the output end of the motor is in contact with the vertical mounting portion of the mounting base, and the output shaft of the motor passes through the vertical mounting portion of the mounting base;

[0015] The gear speed change structure includes a driving gear, a double transmission gear and a driven gear. The driving gear is coaxially fixedly connected to the output shaft of the motor. The double transmission gear is rotatably mounted on the vertical mounting portion of the mounting base through a rotating shaft. The driven gear is transmission-connected to the inner knife tube. The double transmission gear transmission-connects the driving gear and the driven gear.

[0016] Preferably, the negative pressure suction assembly includes a negative pressure suction pipe and a regulating valve, one end of the inner knife tube extending into the shell extends into the transverse mounting portion of the mounting base, one end of the negative pressure suction pipe extends into the transverse mounting portion of the mounting base, and the other end of the negative pressure suction pipe extends out of the shell;

[0017] The regulating valve is rotatably mounted on the transverse mounting portion of the mounting base, and is used to connect or disconnect the negative pressure suction pipe and the inner knife pipe, and the regulating portion of the regulating valve is located outside the housing;

[0018] A sealing ring is provided at the connection between the inner knife tube and the transverse mounting portion of the mounting base, and at the rotation connection between the regulating valve and the transverse mounting portion of the mounting base.

[0019] Preferably, a limiting tube is sleeved on the negative pressure suction tube, one end of the limiting tube abuts against the rear end surface of the transverse mounting portion of the mounting base, and the other end of the limiting tube abuts against the rib plate in the shell.

[0020] Preferably, the contact surface between the transverse mounting portion of the mounting base and the motor is a concave arc surface.

[0021] Preferably, the outer blade tube is fixedly connected to the front end of the transverse mounting portion of the mounting base via a fixed connecting sleeve;

[0022] The water injection assembly includes a water injection pipe, one end of which is located inside the shell, and the other end of which extends out of the shell. The fixed connecting sleeve is provided with a water injection hole, and the end of the water injection pipe located inside the shell is connected to the water injection hole, and the water injection hole is connected to the water injection gap between the outer knife tube and the inner knife tube;

[0023] A sealing ring and a bearing are provided between the end of the fixed connection sleeve close to the mounting base and the inner knife tube.

[0024] According to a drill bit structure for planing provided by the present invention, a drill bit is coaxially fixedly connected to one end of the inner cutter tube, the drill bit rotates relative to the outer cutter tube, and the internal channel of the drill bit is connected to the internal pipe of the inner cutter tube;

[0025] The drill bit is provided with radial suction channels, which are evenly distributed along the circumference of the drill bit, and any of the radial suction channels is communicated with the internal channel of the drill bit.

[0026] According to the present invention, a planing drill bit assembly includes a cutter tube assembly, wherein the cutter tube assembly includes an inner cutter tube and an outer cutter tube, and the inner cutter tube is rotatable relative to the outer cutter tube;

[0027] The outer blade tube comprises a double-layer tube wall, a water injection gap is formed between the double-layer tube walls of the outer blade tube, and a water outlet hole is provided on the drill bit connecting tube, and the water outlet hole is communicated with the water injection gap between the double-layer tube walls;

[0028] The rotary drill bit is provided with a suction hole, and the suction hole is communicated with the inner cavity of the inner cutter tube.

[0029] Preferably, it further comprises a rotary drill bit, a drill bit connecting tube and a power adapter sleeve, wherein one end of the drill bit connecting tube extends into the outer cutter tube and is fixedly connected to the outer cutter tube, one end of the rotary drill bit passes through the interior of the drill bit connecting tube and extends into the inner cutter tube, the rotary drill bit is coaxially fixedly connected to the inner cutter tube via the power adapter sleeve, and the rotary drill bit rotates in conjunction with the drill bit connecting tube;

[0030] The power adapter sleeve abuts against one end of the drill bit connecting tube for limiting position, and the other end of the rotary drill bit has an abutting surface abutting against the other end of the drill bit connecting tube for limiting position.

[0031] According to a planer head for a planing tool provided by the present invention, an outer planing window is provided at one end of the outer blade tube, and outer planing teeth are provided on the outer planing window. The outer planing teeth include a plurality of continuous tooth portions, and the tooth portions of any of the outer planing teeth are inclined outward; an inner planing window is provided at one end of the inner blade tube, and inner planing teeth are provided on the inner planing window. The inner planing teeth include a plurality of continuous tooth portions, and the tooth portions of any of the inner planing teeth are inclined inward.

[0032] According to a planer head for a planing tool provided by the present invention, an outer planing window is provided at one end of the outer blade tube, and a continuous and smooth cutting edge is formed around the opening of the outer planing window; an inner planing window is provided at one end of the inner blade tube, and a tooth portion is respectively provided on two opposite axial sides of the inner planing window, and the two tooth portions are arranged opposite to each other, and a smooth cutting edge is formed around the opening of the inner planing window.

[0033] According to the present invention, a rotary drive handle is provided for being sleeved on a knife tube assembly, wherein the knife tube assembly comprises an inner knife tube and an outer knife tube sleeved on the inner knife tube, comprising:

[0034] A drive assembly is used to drive the outer blade tube to rotate relative to the inner blade tube. The drive assembly includes a drive sleeve and a handwheel. The drive sleeve is mounted on the outer blade tube to drive the outer blade tube to rotate. The handwheel is mounted on the drive sleeve to drive the drive sleeve to rotate.

[0035] A limit assembly is used to limit the rotation of the drive sleeve and provide a gear sense for the rotation of the outer knife tube. The limit assembly is fixedly mounted on the knife tube assembly, and one end of the limit assembly is inserted into the handwheel and engaged with the drive sleeve.

[0036] The elastic member is used to drive the handwheel to rotate and reset, and is installed between the driving sleeve and the handwheel.

[0037] Preferably, the limiting member includes an adapter sleeve, a plurality of limiting grooves are circumferentially and equidistantly arranged on the outer wall of the adapter sleeve, the driving sleeve has an elastic limiting cylinder, the limiting cylinder is adapted to the limiting groove, the hand wheel has a limiting protrusion inside, and when the driving sleeve is in a limit locking state, the limiting cylinder is embedded in one of the limiting grooves, and the limiting protrusion contacts and abuts against the limiting cylinder;

[0038] The outer wall of the driving sleeve is provided with an elastic member installation groove and a protrusion sliding groove, the elastic member is located in the elastic member installation groove, and the limiting protrusion is slidably arranged in the protrusion sliding groove;

[0039] A front limiting sleeve is installed between the driving sleeve and the knife tube assembly, the front limiting sleeve is arranged on the knife tube assembly, the bushing is located in the driving sleeve, a rear limiting sleeve is installed between the limiting assembly and the knife tube assembly, the rear limiting sleeve is arranged on the knife tube assembly, a fixing sleeve is installed between the rear limiting sleeve and the front limiting sleeve, and the fixing sleeve is arranged on the knife tube assembly;

[0040] The proximal end of the outer knife tube is located in the limiting assembly, and the inner knife tube passes through the limiting assembly and is connected to the external power mechanism.

[0041] According to the present invention, a cutter head steering structure is provided, which is used to be sleeved on a cutter tube assembly, wherein the cutter tube assembly includes an inner cutter tube and an outer cutter tube sleeved on the inner cutter tube. The cutter head steering structure includes a handwheel, a fixed sleeve, a drive sleeve assembly and a steel ball. The drive sleeve assembly is fixedly sleeved on the outer cutter tube and is used to drive the outer cutter tube to rotate relative to the inner cutter tube.

[0042] The handwheel is in transmission connection with the drive sleeve assembly, and the rotation of the handwheel drives the drive sleeve assembly to rotate. The handwheel is sleeved on the fixed sleeve;

[0043] The steel ball is located inside the handwheel and is used to limit the rotation of the drive sleeve assembly;

[0044] The fixed sleeve is fixedly arranged, and is used to maintain the position of the steel ball and limit the axial sliding of the driving sleeve assembly; a spring is arranged between the handwheel and the fixed sleeve, and is used to drive the handwheel to slide and reset.

[0045] Preferably, the driving sleeve assembly includes a directional sleeve and a retaining ring, the retaining ring is fixedly sleeved on the directional sleeve, and the rotation of the retaining ring drives the directional sleeve to rotate, the directional sleeve is sleeved on the outer knife tube, and the rotation of the directional sleeve drives the outer knife tube to rotate;

[0046] The outer wall of one end of the directional sleeve is uniformly provided with a plurality of arc grooves along the circumferential direction, and the interior of the hand wheel has a tapered cavity. When the outer knife tube is in a locked state, one end of the steel ball is located in one of the arc grooves, and the inner wall of the tapered cavity contacts and abuts against the steel ball.

[0047] A mounting ring is provided on the outer wall of one end of the directional sleeve, and a plurality of arc-shaped grooves are arranged on the mounting ring. A clamping ring is provided on the end of the fixing sleeve close to the directional sleeve. The mounting ring is located inside the fixing sleeve, and the clamping ring contacts and abuts against one end of the mounting ring.

[0048] The outer wall of the retaining ring is provided with a slot, the hand wheel has a through hole at a position corresponding to the slot, a pin is passed through the through hole, and the pin is slidably arranged in the slot;

[0049] The fixing sleeve is provided with a steel ball hole, and the steel ball is inserted into the steel ball hole;

[0050] The knife tube assembly is provided with an adapter sleeve, the proximal end of the outer knife tube is located in the adapter sleeve, the proximal end of the inner knife tube passes through the adapter sleeve, the fixed sleeve is provided on the adapter sleeve, and one end of the adapter sleeve contacts and abuts against the driving sleeve assembly.

[0051] According to a power handle provided by the present invention, the power handle is sleeved on a knife tube assembly, and the knife tube assembly includes an inner knife tube and an outer knife tube sleeved on the inner knife tube, including:

[0052] A drive assembly is used to drive the outer knife tube to rotate relative to the inner knife tube. The drive assembly includes a handwheel, a stop sleeve and a steering sleeve. The steering sleeve is mounted on the outer knife tube to drive the outer knife tube to rotate. The stop sleeve is mounted on the steering sleeve to drive the steering sleeve to rotate. The handwheel is mounted on the stop sleeve to drive the stop sleeve to rotate.

[0053] Steel ball, used to limit the rotation of the steering sleeve;

[0054] A torsion spring is used to drive the handwheel to reset and rotate, and the torsion spring is located between the stop sleeve and the handwheel;

[0055] The fixed sleeve is used to maintain the position of the steel ball and limit the steering sleeve from sliding in the axial direction. The fixed sleeve is fixedly arranged inside the handwheel.

[0056] Preferably, a plurality of steel ball grooves are evenly distributed circumferentially on the outer wall of the steering sleeve, and a steel ball clearance groove is provided on the inner wall of the handwheel, and both the steel ball grooves and the steel ball clearance groove are adapted to the steel balls;

[0057] A ball pressing protrusion is provided on the inner wall of the hand wheel for pressing the steel ball, and the ball pressing protrusion is located beside the steel ball yielding groove;

[0058] The retaining sleeve includes a baffle and a connecting pipe that are coaxially fixedly connected, the baffle has a limiting notch, the inner wall of the hand wheel has a limiting protrusion, the limiting protrusion is slidably arranged in the limiting notch, the connecting pipe is located in the hand wheel, and the torsion spring is sleeved on the connecting pipe;

[0059] The connecting pipe has a limiting groove, and the steering sleeve is provided with a limiting post at a position corresponding to the limiting groove, and the limiting post is inserted into the limiting groove;

[0060] The steering sleeve is provided with a slotted ring, the steel ball groove is provided on the slotted ring, the slotted ring is located in the fixed sleeve, one end of the fixed sleeve is provided with a limiting ring, one end of the limiting ring contacts and abuts against one end of the slotted ring;

[0061] The fixed sleeve has a steel ball hole, and the steel ball is inserted into the steel ball hole. The power handle also includes a reducer. The proximal end of the inner knife tube is connected to the reducer, and the proximal end of the outer knife tube is located outside the reducer. The hollow interior of the inner knife tube constitutes a liquid suction channel, and the gap between the inner knife tube and the outer knife tube constitutes a water injection channel.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] 1. This application integrates the knife tube assembly, power assembly, negative pressure suction assembly and water injection assembly into the shell to form an integrated structure. No additional handle is required, and cleaning and maintenance are convenient. The power assembly can drive the knife tube assembly to rotate to perform planing operations on the target position of the patient, the negative pressure suction assembly can suck out the broken tissue produced by planing, and the water injection assembly can inject liquid into the target position of the patient, thereby integrating multiple functions into the planing tool with an integrated structure, being able to cope with more work scenarios and having strong applicability.

[0064] 2. In this application, the contact surface between the lateral mounting portion of the mounting base and the motor is formed into a concave arc surface, thereby increasing the contact area between the motor and the lateral mounting portion of the mounting base and improving the cooling effect on the motor.

[0065] 3. The driving gear and the double transmission gear of the present application are both single-sided support structures. Compared with the double-sided support structure, the single-sided support structure of the present application needs to consider the coaxial positioning problem during assembly, and the assembly is simple.

[0066] 4. The present application provides sealing rings at the connection between the inner knife tube and the transverse mounting part of the mounting base, and at the rotational connection between the regulating valve and the transverse mounting part of the mounting base, respectively, to prevent the sucked liquid from flowing out from the connection between the regulating valve and the mounting base, and the connection between the inner knife tube and the mounting base during the negative pressure suction process, which helps to improve the suction effect of the negative pressure suction channel.

[0067] 5. The present application achieves positioning installation of the limiting tube by abutting one end of the limiting tube against the rear end surface of the transverse mounting portion of the mounting base and the other end of the limiting tube against the rib plate inside the shell, thereby improving the stability of the negative pressure suction channel structure.

[0068] 6. In this application, the inner cutter head blade is tilted inward and the outer cutter head blade is tilted outward, and the peripheral surface of the outer cutter head tooth portion is reduced, so that the cutting edge is sharper and the cutting is sharper.

[0069] 7. The present application provides a grip for shearing through the single tooth structure on the two opposite sides of the inner planing window, and the blades of the inner planing window structure and the outer planing window structure are continuous, with few burrs, sharp blades, and easy processing.

[0070] 8. In this application, the outer knife tube semi-encloses the drill bit to act as a sheath, thereby isolating the drill bit from normal tissue and reducing damage to normal tissue.

[0071] 9. This application achieves the limitation of the rotating cutter head by abutting and limiting the power adapter sleeve with one end of the cutter head connecting tube, and the other end of the rotating cutter head has an abutting surface that abuts and limits the other end of the cutter head connecting tube.

[0072] 10. The planing tool of the present application, on the one hand, can realize the relative rotation of the outer blade tube with respect to the inner blade tube by turning the hand wheel; on the other hand, the setting of the water injection channel can flush and cool the planing part, and the setting of the suction channel can extract and suck away the waste liquid in the planing part, which can effectively improve the planing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0074] FIG1 is a cross-sectional view showing the overall structure of an integrated planing tool according to a first embodiment of the present invention;

[0075] FIG2 is a cross-sectional view mainly showing the internal structure of the integrated planing tool housing in the first embodiment of the present invention;

[0076] FIG3 is a schematic diagram showing the overall structure of the power assembly according to the first embodiment of the present invention;

[0077] FIG4 is a schematic diagram of an integrated planing tool water injection assembly according to the first embodiment of the present invention;

[0078] FIG5 is a schematic diagram of a cutter head structure of a planing tool according to the first embodiment of the present invention;

[0079] FIG6 is an exploded schematic diagram of another cutter head structure of a planing tool according to the first embodiment of the present invention;

[0080] FIG7 is a schematic diagram of another cutter head structure of a planing tool according to the first embodiment of the present invention;

[0081] FIG8 is a schematic diagram of the overall structure of the drill bit according to the first embodiment of the present invention;

[0082] FIG9 is a cross-sectional view showing the overall structure of the planing cutter head according to the second embodiment of the present invention;

[0083] FIG10 is a cross-sectional view of a rotating cutter head mounting structure according to a second embodiment of the present invention;

[0084] FIG11 is a schematic diagram showing the structure of the rotating cutter head and the cutter head connecting cylinder according to the second embodiment of the present invention;

[0085] FIG12 is a schematic diagram of an exploded structure of a rotary drive handle according to a third embodiment of the present invention;

[0086] FIG13 is a schematic cross-sectional view of the rotary drive handle according to the third embodiment of the present invention;

[0087] FIG14 is a schematic structural diagram of a rotary drive handle according to a third embodiment of the present invention;

[0088] FIG15 is an enlarged structural diagram of the hand wheel according to the third embodiment of the present invention;

[0089] FIG16 is an enlarged structural diagram of the driving sleeve in the third embodiment of the present invention;

[0090] FIG17 is an enlarged structural diagram of the adapter sleeve according to the third embodiment of the present invention;

[0091] FIG18 is a schematic cross-sectional view of a cutter head steering structure according to a fourth embodiment of the present invention;

[0092] FIG19 is a schematic diagram of an enlarged structure of point A in FIG18 according to a fourth embodiment of the present invention;

[0093] FIG20 is a schematic structural diagram of a tool head steering structure according to a fourth embodiment of the present invention;

[0094] FIG21 is a schematic diagram of an exploded structure mainly showing a cutter head steering structure in the fourth embodiment of the present invention;

[0095] FIG22 is a schematic cross-sectional view of the power handle according to the fifth embodiment of the present invention;

[0096] FIG23 is a schematic diagram of an enlarged structure of point A in FIG22 according to a fifth embodiment of the present invention;

[0097] FIG24 is a schematic diagram of the explosion structure of the power handle according to the fifth embodiment of the present invention;

[0098] FIG25 is an enlarged structural diagram of the retaining sleeve in the fifth embodiment of the present invention;

[0099] FIG26 is an enlarged structural diagram of the hand wheel according to the fifth embodiment of the present invention;

[0100] FIG27 is an enlarged structural diagram of a steering sleeve according to the fifth embodiment of the present invention;

[0101] FIG28 is an enlarged structural diagram of the fixing sleeve according to the fifth embodiment of the present invention;

[0102] FIG29 is a schematic diagram showing the structure of a planing tool according to a fifth embodiment of the present invention;

[0103] FIG30 is a schematic cross-sectional view of the planing tool according to the fifth embodiment of the present invention.

[0104] The figure shows:

[0105] Inner blade tube 110, outer blade tube 120, housing 1001, mounting base 1002, motor 1003, driving gear 1004, double transmission gear 1005, driven gear 1006, fixed connection sleeve 1007, bearing 1008, sealing ring 1009, negative pressure suction pipe 1010, regulating valve 1011, limit pipe 1012, water injection pipe 1013, water injection connection hole 1014, outer planing window 1015, inner planing window 1016, drill bit 1017, radial suction channel 1018, soft spring segment 1019 , rotating cutter head 2001, cutter head connecting tube 2002, power adapter sleeve 2003, abutment surface 2004, water outlet 2005, suction channel 2006, drive sleeve 3210, limiting cylinder 3211, elastic member mounting groove 3212, protruding sliding groove 3213, block 3214, hand wheel 3220, limiting protrusion 3221, adapter sleeve 3310, limiting groove 3311, elastic member 3400, front limiting sleeve 3510, bushing 3520, rear limiting sleeve 3530, fixing sleeve 3540, sealing ring 3 550, handwheel 4010, tapered cavity 4011, through hole 4012, fixing sleeve 4020, snap ring 4021, steel ball hole 4022, steel ball 4030, spring 4040, directional sleeve 4051, mounting ring 4511, arc groove 4512, retaining ring 4052, retaining groove 40521, pin 4060, adapter sleeve 4070, handwheel 5210, steel ball clearance groove 5211, ball pressing protrusion 5212, limiting protrusion 5213, retaining sleeve 5220, baffle 5221, limiting notch 52211, connecting rod Connecting pipe 5222, limiting groove 5223, steering sleeve 5230, steel ball groove 5231, slotted ring 5232, limiting ring 5520, steel ball 5300, torsion spring 5400, fixing sleeve 5500, steel ball hole 5510, reducer 5600, adapter sleeve 5610, sealing ring 5620, front shell 5710, rear shell 5720, suction channel 5800, suction joint 5810, suction pipe 5820, water injection channel 5900, water injection joint 5910, water injection pipe 5920, right-angle joint 5930. DETAILED DESCRIPTION

[0106] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0107] Example 1

[0108] According to a planing tool provided by the present invention, as shown in Figures 1 to 8, it includes a blade tube assembly, and the blade tube assembly includes an inner blade tube 110 and an outer blade tube 120, and the inner blade tube 110 can rotate relative to the outer blade tube 120. Specifically, it also includes a shell 1001, a power assembly, a negative pressure suction assembly and a water injection assembly. The power assembly is arranged in the shell 1001, one end of the blade tube assembly extends into the interior of the shell 1001, and the outer blade tube 120 is fixedly connected to the shell 1001, and the inner blade tube 110 is transmission-connected to the output end of the power assembly. One end of the negative pressure suction assembly extends into the interior of the shell 1001 and is connected to the cavity of the inner blade tube 110, and the other end of the negative pressure suction assembly extends from the shell 1001. The end of the knife tube assembly away from the shell 1001 has a water outlet, and a water injection gap is formed between the inner wall of the outer knife tube 120 and the outer wall of the inner knife tube 110. The water injection gap is connected to the water outlet. One end of the water injection assembly extends into the shell 1001 and is connected to the water injection gap between the outer knife tube 120 and the inner knife tube 110, and the other end of the water injection assembly extends from the shell 1001.

[0109] The planing tool of the present invention integrates the blade tube assembly, power assembly, negative pressure suction assembly, and water injection assembly into the housing 1001, forming an integrated structure. This eliminates the need for an additional handle and facilitates cleaning and maintenance. Furthermore, the power assembly drives the blade tube assembly to rotate and plan the target area on the patient, the negative pressure suction assembly removes the broken tissue produced by planing, and the water injection assembly injects fluid into the target area on the patient. This achieves the integration of multiple functions into a single-piece planing tool, enabling it to cope with a wide range of work scenarios and offering strong applicability.

[0110] Specifically, the housing 1001 of the present application is composed of two half-shells, which are arranged opposite each other. The opposing sides of the two half-shells are concave and form a receiving cavity. Furthermore, ribs are provided in the cavities of the two half-shells to limit the position of the components integrated into the housing 1001, and the ribs also increase the structural strength of the housing 1001.

[0111] More specifically, the power assembly includes a mounting base 1002, a motor 1003 and a gear speed change structure. The mounting base 1002 is fixedly installed in the shell 1001. It should be noted that the installation of the mounting base 1002 in the shell 1001 can be fixed by a rib plate or by means of fasteners. The present application preferably uses a rib plate to limit the installation of the mounting base 1002.

[0112] The mounting base 1002 includes a transverse mounting portion and a vertical mounting portion. The transverse mounting portion of the mounting base 1002 mainly supports the motor 1003, and the vertical mounting portion of the mounting base 1002 mainly provides a mounting position and support for the gear speed change structure. The overall structure is simple and easy to process. The interior of the mounting base 1002 is provided with a through hole along the axial direction, and the through hole allows the negative pressure suction component to perform suction. When the negative pressure suction component is suctioning, the crushed tissue is sequentially extracted through the cavity of the inner knife tube 110, the through hole inside the mounting base 1002, and the negative pressure suction tube 1010. On the one hand, it realizes the suction of the crushed tissue, and on the other hand, it can cool the mounting base 1002 and then cool the motor 1003.

[0113] Specifically, motor 1003 is placed on the horizontal mounting portion of mounting base 1002, with the output end of motor 1003 abutting against the vertical mounting portion of mounting base 1002, and the output shaft of motor 1003 passes through the vertical mounting portion of mounting base 1002. In one feasible embodiment, the output end of motor 1003 is fastened to the vertical mounting portion of mounting base 1002 via fasteners. Furthermore, the contact surface between the horizontal mounting portion of mounting base 1002 and motor 1003 is a concave arc surface, which increases the contact area between motor 1003 and the horizontal mounting portion of mounting base 1002 and improves the cooling effect on motor 1003.

[0114] The gear shifting structure includes a driving gear 1004, a double transmission gear 1005, and a driven gear 1006. The driving gear 1004 is coaxially fixedly connected to the output shaft of the motor 1003. The double transmission gear 1005 is rotatably mounted on the vertical mounting portion of the mounting base 1002 via a rotating shaft. The driven gear 1006 is in transmission connection with the inner knife tube 110. The double transmission gear 1005 transmission-connects the driving gear 1004 and the driven gear 1006. It should be noted that one end of the rotating shaft of the double transmission gear 1005 is connected to the vertical mounting portion of the mounting base 1002, and the other end of the rotating shaft of the double transmission gear 1005 is fixedly connected to a limiting sleeve, and the double transmission gear 1005 rotates in conjunction with the rotating shaft. It should be further noted that the driving gear 1004 and the double transmission gear 1005 of the present application are both single-sided support structures. Compared with the double-sided support structure, the single-sided support structure of the present application needs to consider the coaxial positioning problem during assembly, which simplifies assembly.

[0115] More specifically, the outer blade tube 120 is fixedly connected to the front end of the transverse mounting portion of the mounting base 1002 via a fixed connecting sleeve 1007. One end of the fixed connecting sleeve 1007 extends into the interior of the front end of the transverse mounting portion of the mounting base 1002 and is fixedly connected thereto. The other end of the fixed connecting sleeve 1007 extends to the front end of the housing 1001 and is fixedly connected thereto. The end of the outer blade tube 120 that extends into the housing 1001 extends into the interior of the fixed connecting sleeve 1007 and is fixedly connected thereto. The fixed connecting sleeve 1007 has an axial through-hole through which the inner blade tube 110 can pass and rotate relative to the fixed connecting sleeve 1007. The mounting base 1002 is provided with an escape groove that allows the dual transmission gear 1005 to mesh with the driven gear 1006 and ensures that the movement of the gear transmission structure does not interfere with the mounting base 1002.

[0116] The fixed connection sleeve 1007 is located at the front side of the avoidance groove. A sealing ring 1009 and a bearing 1008 are disposed between the end of the fixed connection sleeve 1007 near the mounting base 1002 and the inner blade tube 110. The sealing ring 1009 and the bearing 1008 are both disposed within the axial through-hole of the fixed connection sleeve 1007. The bearing 1008 and the sealing ring 1009 are disposed between the portion of the inner blade tube 110 located at the rear side of the avoidance groove and the axial through-hole within the mounting base 1002. These provide stable support for the inner blade tube 110 and improve the stability of its rotation. The sealing rings 1009 located at the front and rear sides of the avoidance groove prevent external liquids from entering the gear transmission structure, thereby helping to increase the service life of the gear transmission structure.

[0117] The negative pressure suction assembly includes a negative pressure suction tube 1010 and a regulating valve 1011. The negative pressure suction tube 1010 is a straight tube. One end of the inner knife tube 110 extending into the shell 1001 extends into the horizontal mounting portion of the mounting base 1002, that is, one end of the inner knife tube 110 extending into the shell 1001 extends into the axial through hole of the mounting base 1002, one end of the negative pressure suction tube 1010 extends into the horizontal mounting portion of the mounting base 1002, that is, one end of the negative pressure suction tube 1010 extending into the shell 1001 extends into the axial through hole of the mounting base 1002, and the other end of the negative pressure suction tube 1010 extends out of the shell 1001, thereby realizing the connection between the cavity of the inner knife tube 110 and the cavity of the negative pressure suction tube 1010.

[0118] A regulating valve 1011 is pivotally mounted on the transverse mounting portion of the mounting base 1002, used to connect or disconnect the negative pressure suction tube 1010 and the inner blade tube 110. The regulating portion of the regulating valve 1011 is located outside the housing 1001. Seal rings 1009 are provided at the connection between the inner blade tube 110 and the transverse mounting portion of the mounting base 1002, and at the pivotal connection between the regulating valve 1011 and the transverse mounting portion of the mounting base 1002. These seals prevent the suctioned liquid from escaping from the connection between the regulating valve 1011 and the mounting base 1002, and from the connection between the inner blade tube 110 and the mounting base 1002, during negative pressure suction, thereby improving the suction efficiency of the negative pressure suction channel.

[0119] Since the negative pressure suction tube 1010 needs to be connected to external equipment in actual use, a certain pulling force will be generated on the negative pressure suction tube 1010. In order to prevent the connection between the negative pressure suction tube 1010 and the mounting base 1002 from failing, the technical solution of the present application provides a feasible installation method: a coaxial sleeve is provided on the negative pressure suction tube 1010. A limiting tube 1012 is abutted against the rear end face of the horizontal mounting portion of the mounting base 1002 at one end of the limiting tube 1012, and the other end of the limiting tube 1012 abuts against the rib plate inside the shell 1001, thereby realizing the positioning installation of the limiting tube 1012 and improving the stability of the negative pressure suction channel structure.

[0120] The water injection assembly includes a water injection pipe 1013, one end of which is located inside the shell 1001, and the other end of the water injection pipe 1013 extends out of the shell 1001. A water injection connection hole 1014 is provided on the fixed connecting sleeve 1007. The end of the water injection pipe 1013 located inside the shell 1001 is connected to the water injection connection hole 1014, and the water injection connection hole 1014 is connected to the water injection gap between the outer knife tube 120 and the inner knife tube 110.

[0121] A water outlet is provided at the end of the knife tube assembly away from the shell 1001, and the water outlet is connected to the water injection gap. The water injection pipe 1013 can be connected to an external water source. The external water source first passes through the water injection pipe 1013, then enters the water injection gap between the outer knife tube 120 and the inner knife tube 110, and then flows out from the water outlet at the end of the knife tube assembly away from the shell 1001.

[0122] The present application proposes a planer head for a planing tool: an outer planing window 1015 is provided at one end of the outer blade tube 120, and outer planing teeth are provided on the outer planing window 1015. The outer planing teeth include a plurality of continuous tooth portions, and the tooth portions of any outer planing teeth are inclined outward. An inner planing window 1016 is provided at one end of the inner blade tube 110, and inner planing teeth are provided on the inner planing window 1016. The inner planing teeth include a plurality of continuous tooth portions, and the tooth portions of any inner planing teeth are inclined inward. The tooth portions of the outer planing teeth and the tooth portions of the inner planing teeth are staggered. The staggered tooth portions of the inner planing teeth and the outer planing teeth help to increase the shear force of the blade tube assembly. In this embodiment, the inner blade portion of the inner blade head is inclined inward, and the outer blade portion of the outer blade head is inclined outward. The peripheral surface of the outer blade head tooth portion is reduced, the cutting edge is sharper, and the cutting effect is sharper. The knife tube assembly of this embodiment is mainly used for soft tissue. During negative pressure suction, the broken tissue enters the cavity of the inner knife tube 110 through the outer planing window 1015 and the inner planing window 1016, and is then discharged through the cavity of the negative pressure suction tube 1010.

[0123] This application proposes another planing tool head for a planing tool: an outer planing window 1015 is provided at one end of the outer blade tube 120, with a continuous, smooth blade formed at the opening of the outer planing window 1015. An inner planing window 1016 is provided at one end of the inner blade tube 110, with a tooth portion disposed on each of the two opposing sides of the inner planing window 1016. The two teeth are arranged in an opposing manner, and the blade portion at the opening of the inner planing window 1016 is smooth and continuous. The single tooth structure on the two opposing sides of the inner planing window 1016 provides a grip for shearing. The blade portions of the inner planing window 1016 and the outer planing window 1015 are both continuous, with minimal burrs, a sharp edge, and easy processing. The blade tube assembly of this embodiment is primarily intended for soft tissue. During vacuum suction, the crushed tissue enters the cavity of the inner blade tube 110 through the outer planing window 1015 and the inner planing window 1016, and is then discharged through the cavity of the vacuum suction tube 1010.

[0124] The present application also proposes a drill bit structure that can replace the planer head in the above-mentioned embodiment. A drill bit 1017 is coaxially fixedly connected to one end of the inner cutter tube 110. The drill bit 1017 rotates relative to the outer cutter tube 120, and the internal channel of the drill bit 1017 is connected to the internal pipeline of the inner cutter tube 110. The drill bit 1017 is provided with radial suction channels 1018. The radial suction channels 1018 are evenly distributed along the circumference of the drill bit 1017. Any radial suction channel 1018 is connected to the internal channel of the drill bit 1017. The outer cutter tube 120 semi-surrounds the drill bit 1017. In a preferred embodiment, two symmetrical radial suction channels 1018 are provided on the drill bit 1017. Both radial suction channels 1018 are connected to the internal channel of the drill bit 1017, which helps to improve the rotation stability of the drill bit 1017 and improve dynamic balance. The drill bit 1017 of this embodiment is primarily designed for harder tissue, such as bone. During vacuum suction, the broken tissue enters the internal channel of the drill bit 1017 through the radial suction channel 1018, then enters the lumen of the inner blade tube 110, and is then discharged through the cavity of the vacuum suction tube 1010. The outer blade tube 120 semi-encloses the drill bit 1017 and acts as a sheath, isolating the drill bit 1017 from normal tissue and reducing damage to normal tissue. It should be noted that the drill bit 1017 of this embodiment does not need to have a water injection function.

[0125] The integrated planing tool of the technical solution of the present application can plane the tissue at the target position of the patient, and can extract the broken tissue produced by planing by means of negative pressure suction, and can inject water into the target position. With the help of the regulating valve 1011, when working in a confined space, such as the knee, the negative pressure suction channel can be blocked to prevent the liquid in the sealed space from accidentally flowing out through the negative pressure suction channel, thereby achieving controllable suction and being adaptable to more work scenarios. The design of the tooth edges of the inner knife tube 110 and the outer knife tube 120 improves the planing effect. The radial suction channels 1018 are evenly distributed along the circumference of the drill bit 1017, thereby improving the dynamic balance of the drill bit 1017.

[0126] It should be noted that the blade tube assembly of the present application can have a straight configuration, or it can have a straight configuration on the side close to the housing 1001 and a curved configuration on the side away from the housing 1001. The straight configuration can make negative pressure suction smoother. When the blade tube assembly adopts a curved configuration on the side away from the housing 1001, the curved section of the inner conduit needs to be configured as a flexible pipe structure that can transmit torque. For example, the curved section adopts a soft spring section 1019 with a soft spring structure. Furthermore, a protective cover can be provided on the outside of the soft spring section 1019.

[0127] It should be noted that the integrated planer blade structure of the present application can be integrated with a cable and / or a plug, and the motor 1003 can be powered and controlled by the cable and plug integrated in the housing of the integrated planer blade structure. In a feasible embodiment, the integrated planer blade structure of the present application is connected to the host machine via a cable and / or a plug, and the integrated planer blade structure is controlled by a foot pedal to start or stop the planing operation.

[0128] Example 2

[0129] Based on the first embodiment, a planing drill bit assembly provided by the present invention is mainly improved with respect to the water injection gap on the blade tube assembly and the blade head assembly. As shown in Figures 9 to 11, it includes a blade tube assembly, which includes an inner blade tube 110 and an outer blade tube 120, and the inner blade tube 110 can rotate relative to the outer blade tube 120. It also includes a rotary drill bit 2001, a drill bit connecting tube 2002, and a power adapter sleeve 2003. One end of the drill bit connecting tube 2002 extends into the outer blade tube 120 and is fixedly connected to the outer blade tube 120. One end of the rotary drill bit 2001 passes through the interior of the drill bit connecting tube 2002 and extends into the inner blade tube 110. The rotary drill bit 2001 is coaxially fixedly connected to the inner blade tube 110 through the power adapter sleeve 2003, and the rotary drill bit 2001 rotates in conjunction with the drill bit connecting tube 2002. The power adapter sleeve 2003 abuts against one end of the drill bit connecting tube 2002 for limiting position, and the other end of the rotary drill bit 2001 has an abutting surface 2004 abutting against the other end of the drill bit connecting tube 2002 for limiting position.

[0130] The rotary drill bit 2001 in this embodiment primarily acts on harder tissues. The technical solution of this application utilizes a drill bit connection tube 2002 fixedly connected to the outer tube to support the rotary drill bit 2001. The rotary drill bit 2001 is connected to the inner cutter tube 110 via a power adapter sleeve 2003. The power adapter sleeve 2003 abuts and limits one end of the drill bit connection tube 2002. The other end of the rotary drill bit 2001 has an abutment surface 2004 that abuts and limits the other end of the drill bit connection tube 2002, thereby limiting the position of the rotary drill bit 2001. In particular, when the cutter tube assembly is curved on the side away from the housing, the curved section from the inner tube to the tube needs to transmit torque. This curved section is configured as a soft spring section. Because the soft spring section is easily stretched axially, if the rotary drill bit 2001 is not axially limited, the rotary drill bit 2001 will experience axial deviation during surgery, affecting the surgical effect.

[0131] It should be noted that the outer blade tube 120 comprises a double-walled tube, with a water injection gap formed between the double-walled tubes. A water outlet 2005 is provided on the drill bit connecting tube 2002, communicating with the water injection gap between the double-walled tubes. A suction channel 2006 is provided on the rotating drill bit 2001. The suction channel 2006 is coaxial with the rotating drill bit 2001 and is a through hole. The suction channel 2006 opens on the working end face of the rotating drill bit 2001 and communicates with the inner cavity of the inner blade tube 110. Water is injected through the water injection gap of the double-walled outer blade tube 120, isolating the water injection channel from the soft spring section of the inner blade tube 110. This prevents liquid from being drawn away from the water injection gap during negative pressure suction, thereby improving the reliability and stability of water injection.

[0132] It should be further explained that the portion of the drill connecting tube 2002 extending out of the outer knife tube 120 is configured to be contracted from one end close to the outer knife tube 120 to the other end away from the outer knife tube 120, which can reduce visual obstruction and improve the field of view during surgery.

[0133] Example 3

[0134] Referring to Figures 12 to 17 , the rotary drive handle of this embodiment is configured to be mounted on a blade tube assembly. The blade tube assembly of this embodiment is equivalent to the blade tube assembly of Example 1 or Example 2. The blade tube assembly includes an inner blade tube 110 and an outer blade tube 120 mounted on the inner blade tube 110. The rotary drive handle comprises a drive assembly, a stop assembly, and an elastic member 3400. The elastic member 3400 is preferably a U-shaped elastic steel sheet. The drive assembly is configured to drive the outer blade tube 120 to rotate relative to the inner blade tube 110. The drive assembly comprises a drive sleeve 3210 and a handwheel 3220. The drive sleeve 3210 is mounted on the outer blade tube 120. Rotation of the drive sleeve 3210 causes the outer blade tube 120 to rotate accordingly. The handwheel 3220 is mounted on the drive sleeve 3210 to rotate the drive sleeve 3210. The limiter assembly is used to limit the rotation of the drive sleeve 3210 and provide a sense of gear for the rotation of the outer blade tube 120. The limiter assembly is mounted on the blade tube assembly. One end of the limiter assembly is inserted into the handwheel 3220 and engages with the drive sleeve 3210, limiting the rotation of the drive sleeve 3210. An elastic member 3400 is installed between the drive sleeve 3210 and the handwheel 3220 to control the rotation and reset of the handwheel 3220. The proximal end of the outer blade tube 120 is located within the limiter assembly, and the inner blade tube 110 passes through the limiter assembly and is connected to the external power mechanism.

[0135] Specifically, referring to Figure 17 , the limiting member includes an adapter sleeve 3310, with a plurality of arc-shaped limiting grooves 3311 circumferentially and equidistantly arranged on the outer wall of one end of the adapter sleeve 3310. Referring to Figure 5 , the drive sleeve 3210 includes an elastic limiting cylinder 3211, which mates with the limiting grooves 3311. The cooperation of the limiting cylinder 3211 and the limiting grooves 3311 allows the limiting assembly to be engaged with the drive sleeve, while the limiting cylinder 3211 is pressed tightly into the limiting grooves 3311, locking the drive sleeve and preventing it from rotating, thereby locking the outer blade tube. Please refer to Figure 4. The handwheel 3220 has a limiting protrusion 3221 inside. When the driving sleeve 3210 is in a limiting locked state, the limiting cylinder 3211 is embedded in one of the limiting grooves 3311, and the limiting protrusion 221 contacts and abuts against the limiting cylinder 3211. That is, the limiting protrusion 221 tightly presses the limiting cylinder 3211 in the limiting groove 3311, preventing the driving sleeve 3210 from rotating, and thus preventing the outer knife tube 120 from rotating.

[0136] 5 , the outer wall of the drive sleeve 3210 is provided with an elastic member mounting groove 3212 and a protrusion sliding groove 3213. Preferably, the elastic member mounting groove 3212 and the protrusion sliding groove 3213 are positioned opposite each other, the elastic member 3400 is positioned within the elastic member mounting groove 3212, and the limiting protrusion 3221 is slidably disposed within the protrusion sliding groove 3213. Specifically, four clamping blocks 3214 are arranged on the outer wall of the drive sleeve 3210. The four clamping blocks 3214 are arranged in pairs axially symmetrically. Two of the clamping blocks 3214 form the elastic member mounting groove 3212 with the outer wall of the drive sleeve 3210, while the other two clamping blocks 3214 form the protrusion sliding groove 3213 with the outer wall of the drive sleeve 3210. When the hand wheel 3220 is turned to a certain angle, the limiting protrusion 3221 disengages from the limiting cylinder 3211. When the limiting protrusion 3221 inside the hand wheel 3220 contacts and abuts the side wall of the protruding sliding groove 3213, the hand wheel 3220 is continued to be turned. The hand wheel 3220 will drive the driving sleeve 3210 to rotate, and then drive the outer knife tube 120 to rotate relative to the inner knife tube 110. After rotating to a suitable angle, the limiting cylinder 3211 is embedded in another limiting groove 3311. The hand wheel 3220 is released, and the hand wheel 3220 rotates and returns to its original position under the action of the elastic member 3400. At this time, the limiting protrusion 3221 is used to press the limiting cylinder 3211 into the other limiting groove 3311, thereby realizing automatic locking of the driving sleeve 3210 to prevent it from rotating easily.

[0137] To ensure a more secure and stable connection between the drive sleeve 3210 and the blade tube assembly, a front stop sleeve 3510 is installed between the drive sleeve 3210 and the blade tube assembly. The front stop sleeve 3510 is mounted on the blade tube assembly. A bushing 3520 is mounted on the front stop sleeve 3510 and positioned within the drive sleeve 3210. To ensure a more secure and stable connection between the stop assembly and the blade tube assembly, a rear stop sleeve 3530 is installed between the stop assembly and the blade tube assembly. A fixing sleeve 3540 is installed between the rear stop sleeve 3530 and the front stop sleeve 3510. The fixing sleeve 3540 is mounted on the blade tube assembly. The fixing sleeve 3540 and the rear limiting sleeve 3530 also serve to limit the axial sliding of the adapter sleeve 3310 along the knife tube assembly. A sealing ring 3550 is provided on the fixing sleeve 3540 and is located between the bushing 3520 and the adapter sleeve 3310.

[0138] When the position of the planer window on the outer blade tube 120 needs to be adjusted, that is, when the outer blade tube 120 needs to be rotated relative to the inner blade tube 110, the hand wheel 3220 is turned. During the rotation process, the limiting protrusion 3221 gradually separates from the limiting cylinder 3211 and rotates until the limiting protrusion 3221 inside the hand wheel 3220 contacts the side wall of the protruding sliding groove 3213. The hand wheel 3220 is continued to be turned, and the hand wheel 3220 will drive the driving sleeve 3210 to rotate, thereby driving the outer blade tube 120 relative to the inner blade tube 110. As the blade tube 110 rotates, the drive sleeve 3210 rotates, causing the limiting cylinder 3211 to disengage the limiting groove 3311. After rotating to the appropriate angle, the limiting cylinder 3211 engages the other limiting groove 3311. The handwheel 3220 is released, and the handwheel 3220 rotates back to its original position under the action of the elastic member 3400. At this time, the limiting protrusion 3221 presses the limiting cylinder 3211 into the other limiting groove 3311, automatically locking the drive sleeve 3210 and preventing it from rotating easily. The rotary drive handle of this embodiment can achieve relative rotation of the outer blade tube 120 relative to the inner blade tube 110 by rotating the handwheel 3220. The multiple limiting grooves 3311 provided on the adapter sleeve 3310 can achieve multiple rotation gears, making operation convenient and quick.

[0139] Continuing with Figures 12 to 17 , the planing tool of this embodiment includes the rotary drive handle and blade tube assembly described in Example 1. Connecting the proximal end of the inner blade tube 110 of the blade tube assembly to a power mechanism enables rotational control of the inner blade tube 110. Rotating the drive handle controls the rotation of the outer blade tube 120 relative to the inner blade tube 110. This planing tool is convenient and flexible to use.

[0140] It should be noted that the distal end in the above embodiment refers to the end of the blade head of the blade tube assembly used for planing bone tissue, and the proximal end is the end away from the distal end (handheld).

[0141] Example 4

[0142] Referring to Figures 18 to 21 , this embodiment discloses a tool head steering structure, which is configured to be mounted on a tool tube assembly. The tool tube assembly of this embodiment is equivalent to the tool tube assembly of Embodiments 1 or 2. The tool tube assembly includes an inner tool tube 110 and an outer tool tube 120 mounted on the inner tool tube 110. The tool head steering structure is configured to drive the outer tool tube 120 to rotate relative to the inner tool tube 110.

[0143] The tool head steering mechanism includes a handwheel 4010, a fixed sleeve 4020, a drive sleeve assembly, and a steel ball 4030. The drive sleeve assembly is fixedly mounted on the outer blade tube 120 and is used to drive the outer blade tube 120 to rotate relative to the inner blade tube 110. Rotation of the drive sleeve assembly causes the outer blade tube 120 to rotate accordingly. The handwheel 4010 is in transmission connection with the drive sleeve assembly, so that rotation of the handwheel 4010 drives the drive sleeve assembly. The handwheel 4010 is mounted on the fixed sleeve 4020. To facilitate rotation of the handwheel 4010, an anti-slip groove is formed on its outer circumference. The steel ball 4030 is located within the handwheel 4010 and limits rotation of the drive sleeve assembly. The fixed sleeve 4020 is fixedly mounted to maintain the position of the steel ball 4030 and limit axial slippage of the drive sleeve assembly. A spring 4040 is interposed between the handwheel 4010 and the fixed sleeve 4020 to drive the handwheel 4010 to slide and return.

[0144] Specifically, the drive sleeve assembly includes an orientation sleeve 4051 and a retaining ring 4052. The retaining ring 4052 is fixedly mounted on the orientation sleeve 4051. When the retaining ring 4052 rotates, the orientation sleeve 4051 rotates. The orientation sleeve 4051 is mounted on the outer blade tube 120. When the orientation sleeve 4051 rotates, the outer blade tube 120 rotates, thereby realizing that the rotation of the drive sleeve assembly drives the outer blade tube 120. A plurality of arcuate grooves 4512 are evenly distributed along the circumference on the outer wall of one end of the orientation sleeve 4051. Specifically, a mounting ring 4511 is provided on the outer wall of one end of the orientation sleeve 4051 for the fixed sleeve 4020. A plurality of arcuate grooves 4512 are evenly distributed on the mounting ring 4511 at equal distances. The arcuate grooves 4512 are adapted to fit the steel balls 4030. The handwheel 4010 has a tapered cavity 4011 within it. When the outer blade tube 120 is locked, one end of the steel ball 4030 is located in one of the arcuate grooves 4512, and the inner wall of the tapered cavity 4011 contacts and abuts the steel ball 4030. The outer wall of the retaining ring 4052 has a retaining groove 4521. The handwheel 4010 has a through hole 4012 corresponding to the retaining groove 4521. A pin 4060 is inserted through the through hole 4012 and slides in the retaining groove 4521. The end of the retaining ring 4052, facing away from the blade, contacts and abuts the end of the fixing sleeve 4020, which is closer to the blade, further limiting the axial movement of the drive sleeve assembly. Slide the hand wheel 4010 in the direction away from the cutter head and rotate the hand wheel 4010, the hand wheel 4010 slides in the direction away from the cutter head, the pin 4060 slides in the slot 4521, and the cavity wall of the tapered cavity 4011 inside the hand wheel 4010 is separated from the steel ball 4030, that is, there is no pressure on the steel ball 4030, and the directional sleeve 4051 can rotate at this time; because one end of the pin 4060 is set in the slot 4521, the rotation of the hand wheel 4010 will drive the retaining ring 4052 to rotate, and the retaining ring 4052 The rotation drives the directional sleeve 4051 to rotate, and the rotation of the directional sleeve 4051 drives the outer knife tube 120 to rotate. When the outer knife tube 120 rotates to a suitable position, the steel ball 4030 enters another arc groove 4512 and is released at this time. Under the action of the restoring force of the spring 4040, the handwheel 4010 slides back to the direction close to the cutter head, and the cavity wall of the conical cavity 4011 in the handwheel 4010 presses the steel ball 4030 again, thereby locking the directional sleeve 4051 and then locking the outer knife tube 120.

[0145] To prevent the directional sleeve 4051 in the drive sleeve assembly from sliding axially, a retaining ring 4021 is provided at one end of the fixed sleeve 4020 near the directional sleeve 4051. The mounting ring 4511 is located inside the fixed sleeve 4020, and the retaining ring 4021 contacts and abuts against one end of the mounting ring 4511. An adapter sleeve 4070 is provided on the knife tube assembly. The adapter sleeve 4070 is used to connect to an external reduction gearbox, which is a conventional reduction gearbox. The proximal end of the outer knife tube 120 is located in the adapter sleeve 4070, and the proximal end of the inner knife tube 110 passes through the adapter sleeve 4070. The fixed sleeve 4020 is located on the adapter sleeve 4070, and one end of the adapter sleeve 4070 contacts and abuts against the drive sleeve assembly. The retaining ring 4021 and the adapter sleeve 4070 fix the axial position of the directional sleeve 4051 to prevent it from sliding axially during use. It should be noted that, in this embodiment, the distal end refers to the cutter head end of the knife tube assembly, and the proximal end refers to the end away from the cutter head.

[0146] The fixing sleeve 4020 has a steel ball hole 4022, and the steel ball 4030 is inserted into the steel ball hole 4022. The setting of the steel ball hole 4022 is used to stabilize the steel ball 4030, prevent the steel ball 4030 from sliding and dislocating, and affect the rotation of the outer knife tube 120.

[0147] In the cutter head steering mechanism of this embodiment, when the outer cutter tube 120 needs to rotate relative to the inner cutter tube 110, the handwheel 4010 is slid away from the cutter head until it stops sliding. At this time, the pin 4060 slides in the retaining groove 4521, the spring 4040 is compressed, and the cavity wall of the tapered cavity 4011 inside the handwheel 4010 is separated from the steel ball 4030, that is, there is no pressure on the steel ball 4030, and the directional sleeve 4051 can now rotate. The handwheel 4010 is rotated, and under the action of the pin 4060, the handwheel 4010 rotates, driving the retaining ring 4052 to rotate, and then driving the directional sleeve 4051 to rotate. The rotation of the directional sleeve 4051 drives the outer cutter tube 120 to rotate, thereby achieving the outer cutter tube 120 rotation relative to the inner cutter tube 110. During the rotation of the directional sleeve 4051, the steel ball 4030 disengages from the original arcuate groove 4512. When the outer blade tube 120 rotates to the appropriate position, the steel ball 4030 enters the corresponding arcuate groove 4512. At this time, the handwheel 4010 is released. Under the restoring force of the spring 4040, the handwheel 4010 slides back toward the blade head. The wall of the tapered cavity 4011 in the handwheel 4010 presses the steel ball 4030 again, locking the directional sleeve 4051 and then the outer blade tube 120. The operation is simple and quick, which improves surgical efficiency to a certain extent and shortens surgical time.

[0148] Continuing with Figures 18 to 21 , this embodiment provides a planing tool comprising the cutter head steering structure and a blade tube assembly of Example 1. By connecting the proximal end of the inner blade tube 110 of the blade tube assembly to an external power mechanism, the rotation of the inner blade tube 110 can be controlled. By sliding and turning the handwheel 4010, the rotation of the outer blade tube 120 relative to the inner blade tube 110 can be controlled. This planing tool offers the advantages of convenient and flexible operation.

[0149] Example 5

[0150] Referring to Figures 22 to 30 , this embodiment discloses a power handle that is mounted on a blade tube assembly. The blade tube assembly of this embodiment is equivalent to the blade tube assembly of Example 1 or Example 2. The blade tube assembly of this application includes an inner blade tube 110 and an outer blade tube 120 mounted on the inner blade tube 110. The power handle includes a drive assembly, a steel ball 5300, a fixing sleeve 5500, and a torsion spring 5400. The drive assembly is used to drive the outer blade tube 120 to rotate relative to the inner blade tube 110. The drive assembly includes a handwheel 5210, a stopper sleeve 5220, and a steering sleeve 5230. The steering sleeve 5230 is mounted on the outer blade tube 120 to drive the outer blade tube 120 to rotate. The stopper sleeve 5220 is mounted on the steering sleeve 5230 to drive the steering sleeve 5230 to rotate. The handwheel 5210 is mounted on the stopper sleeve 5220 to drive the stopper sleeve 5220 to rotate. The steel ball 5300 is used to limit the rotation of the steering sleeve 5230. The torsion spring 5400 is used to drive the hand wheel 5210 to reset and rotate. The torsion spring 5400 is located between the stop sleeve 5220 and the hand wheel 5210. The fixed sleeve 5500 is used to maintain the position of the steel ball 5300 and limit the steering sleeve 5230 from sliding axially. The fixed sleeve 5500 is fixedly arranged inside the hand wheel 5210.

[0151] Specifically, referring to Figures 27 and 28, a plurality of steel ball grooves 5231 are evenly distributed circumferentially on the outer wall of the steering sleeve 5230, and a steel ball clearance groove 211 is provided on the inner wall of the handwheel 5210. Both the steel ball grooves 5231 and the steel ball clearance groove 211 are adapted to accommodate the steel ball 5300. The provision of multiple steel ball grooves 5231 enables multiple gear settings for the rotation of the outer blade tube 120. A ball pressing protrusion 5212 is provided on the inner wall of the handwheel 5210 for pressing the steel ball 5300. The ball pressing protrusion 5212 is located next to the steel ball clearance groove 211. When the outer blade tube 120 is locked and cannot rotate, the ball pressing protrusion 5212 presses the steel ball 5300 into one of the steel ball grooves 5231.

[0152] Referring to Figure 4 , the stopper sleeve 5220 includes a coaxially fixed baffle 5221 and a connecting tube 5222. The baffle 5221 has a limiting notch 52211. The inner wall of the handwheel 5210 has a limiting protrusion 5213, which slides within the limiting notch 52211. Using the above technical solution, when the handwheel 5210 is rotated to a certain angle, i.e., until the limiting protrusion 5213 abuts the inner wall of the limiting notch 52211, the handwheel 5210 drives the stopper sleeve 5220 to rotate, thereby driving the steering sleeve 5230 to rotate. The connecting tube 5222 is located within the handwheel 5210, and a torsion spring 5400 is mounted on the connecting tube 5222. The connecting tube 5222 has a limiting slot 5223, and the steering sleeve 5230 is provided with a limiting post corresponding to the limiting slot 5223, which is inserted into the limiting slot 5223. By inserting the limiting post into the limiting groove 5223 , the connection between the stopper sleeve 5220 and the steering sleeve 5230 is achieved, thereby enabling the steering sleeve 5230 to rotate when the stopper sleeve 5220 rotates.

[0153] Referring to Figure 28 , one end of the fixed sleeve 5500 is sleeved onto the end of the steering sleeve 5230 having the steel ball groove 5231. Specifically, the steering sleeve 5230 is provided with a slotted ring 5232, with the steel ball groove 5231 defined therein. The slotted ring 5232 is located within the fixed sleeve 5500. A retaining ring 5520 is located within one end of the fixed sleeve 5500, with one end of the retaining ring 5520 contacting and abutting against one end of the slotted ring 5232. The retaining ring 5520 within the fixed sleeve 5500 and the slotted ring 5232 on the steering sleeve 5230 prevent axial slippage of the steering sleeve 5230, further stabilizing the rotational movement of the outer blade tube 120 relative to the inner blade tube 110. The fixed sleeve 5500 also has a steel ball hole 5510, into which the steel ball 5300 is inserted. The steel ball hole 5510 on the fixing sleeve 5500 is provided to stabilize the steel ball 5300 and prevent the steel ball 5300 from sliding and being dislocated, thereby affecting the rotation of the outer blade tube 120 .

[0154] The power handle of this embodiment also includes a reducer 5600. The proximal end of the inner blade tube 110 is connected to the reducer 5600, and the proximal end of the outer blade tube 120 is located outside the reducer 5600. The proximal end here refers to the end away from the blade head for planing bone tissue. The reducer 5600 of this embodiment can be a conventional reducer.

[0155] The power handle of this embodiment further includes a front shell 5710 and a rear shell 5720 , which are connected to form the shell of the power handle, and the shell is connected to both the hand wheel 5210 and the fixing sleeve 5500 .

[0156] The hollow interior of the inner blade tube 110 forms a liquid suction channel 5800, and the gap between the inner blade tube 110 and the outer blade tube 120 forms a water injection channel 5900. Water can be injected into the cutter head through the water injection channel 5900 and flow out of the cutter head to cool and flush the planing operation area of ​​the cutter head assembly. Waste liquid is then extracted from the cutter head through the suction channel 5800.

[0157] When it is necessary to rotate the outer knife tube 120, the hand wheel 5210 is turned, and the hand wheel 5210 rotates until a part of the steel ball 5300 is embedded in the steel ball yield groove 211. The hand wheel 5210 is continued to be turned, and the limiting protrusion 5213 slides until it is against the inner wall of the limiting notch 52211. The hand wheel 5210 will drive the stop sleeve 5220 to rotate, and the stop sleeve 5220 drives the steering sleeve 5230 to rotate, and the steering sleeve 5230 drives the outer knife tube 120 to rotate. When the steering sleeve 5230 rotates until the steel ball 5300 jumps into the other steel ball groove 5231, the hand wheel 5210 is released, and the hand wheel 5210 rotates in the opposite direction and resets under the action of the torque of the torsion spring 5400. The ball pressing protrusion reset to the inner wall of the hand wheel 5210 presses the steel ball 5300 into the other steel ball groove 5231 into which it jumps, thereby locking the outer knife tube 120. During the entire process of turning the hand wheel, the fixed sleeve is fixed.

[0158] The fixed sleeve in the power handle of this embodiment can maintain the position of the steel ball 5300 through the steel ball hole 5510, preventing the steel ball 5300 from sliding freely in the handwheel 5210; in the process of rotating the handwheel 5210 to drive the steering sleeve 5230 to rotate, a rotational damping sense is provided, and the gear sense of the rotation of the outer knife tube 120 is realized by cooperating with the steel ball groove 5231 on the steering sleeve 5230; the limiting ring 5520 inside the fixed sleeve 5500 and the slotted ring 5232 on the steering sleeve 5230 are in contact and abutment with each other, thereby preventing the steering sleeve 5230 from sliding axially, making the rotational movement of the outer knife tube 120 relative to the inner knife tube 110 more stable. When the position of the planer window needs to be adjusted, rotating the handwheel 5210 can drive the outer knife tube 120 to rotate relative to the inner knife tube 110, which is very convenient to operate. When the outer knife tube 120 is in a locked state, the ball pressing protrusion 5212 presses the steel ball 5300 tightly against the steel ball groove 5231, so that the outer knife tube 120 cannot be easily rotated directly, and it is safe and reliable to use.

[0159] 29 and 30 , this embodiment provides a planing tool, comprising the power handle and blade barrel assembly of Embodiment 1, and further comprising a suction connector 5810, a suction pipe 5820, a water injection connector 910, and a water injection pipe 5920. The suction connector 5810 communicates with the hollow interior of the inner blade barrel 110 via the suction pipe 5820, and the water injection connector 910 communicates with the water injection channel 5900 via the water injection pipe 5920. An adapter sleeve 5610 is sleeved on the proximal end of the blade barrel assembly. One end of the adapter sleeve 5610 is inserted into the fixed sleeve 5500, and a sealing ring 5620 is disposed within the end of the adapter sleeve 5610 proximal to the steel ball 5300. The sealing ring 5620 is sleeved on the outer blade barrel 120. The end of the adapter sleeve 5610 distal from the steel ball 5300 has a water injection hole, which communicates with the water injection channel. The water injection hole is connected to a right-angle joint 5930, which is in communication with the water injection pipe 5920. The proximal end of the outer blade tube 120 is located in the adapter sleeve 5610, and the proximal end of the inner blade tube 110 passes through the adapter sleeve 5610.

[0160] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0161] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A planing tool, characterized in that, It includes a cutter tube assembly, which includes an inner cutter tube and an outer cutter tube, and the inner cutter tube can rotate relative to the outer cutter tube.

2. The planing tool according to claim 1, characterized in that, It further includes a housing, a power assembly, and a negative pressure suction assembly; The power assembly is arranged in the housing. One end of the cutter tube assembly extends into the interior of the housing, and the outer cutter tube is fixedly connected to the housing, and the inner cutter tube is in transmission connection with the output end of the power assembly; One end of the negative pressure suction assembly extends into the interior of the housing and is communicated with the cavity of the inner cutter tube, and the other end of the negative pressure suction assembly extends out of the housing.

3. The planing tool according to claim 2, characterized in that, It further includes a water injection assembly. One end of the cutter tube assembly away from the housing has a water outlet. A water injection gap is formed between the inner wall of the outer cutter tube and the outer wall of the inner cutter tube, and the water injection gap is communicated with the water outlet. One end of the water injection assembly extends into the housing and is communicated with the water injection gap between the outer cutter tube and the inner cutter tube, and the other end of the water injection assembly extends out of the housing.

4. The planing tool according to claim 2, characterized in that, The power assembly includes a mounting base, a motor, and a gear speed change structure. The mounting base is fixedly installed in the housing. The motor is placed on the horizontal mounting part of the mounting base. The output end of the motor is attached to the vertical mounting part of the mounting base, and the output shaft of the motor passes through the vertical mounting part of the mounting base; The gear speed change structure includes a driving gear, a double-link transmission gear, and a driven gear. The driving gear is coaxially and fixedly connected to the output shaft of the motor. The double-link transmission gear is rotatably installed on the vertical mounting part of the mounting base through a rotating shaft. The driven gear is in transmission connection with the inner cutter tube, and the double-link transmission gear transmits the driving gear and the driven gear.

5. The planing tool according to claim 4, characterized in that, The negative pressure suction assembly includes a negative pressure suction pipe and a regulating valve. One end of the inner cutter tube extending into the housing extends into the horizontal mounting part of the mounting base. One end of the negative pressure suction pipe extends into the horizontal mounting part of the mounting base, and the other end of the negative pressure suction pipe extends out of the housing; The regulating valve is rotatably arranged on the horizontal mounting part of the mounting base for connecting or disconnecting the negative pressure suction pipe and the inner cutter tube, and the adjusting part of the regulating valve is located outside the housing; At the connection between the inner cutter tube and the horizontal mounting part of the mounting base, and at the rotating connection between the regulating valve and the horizontal mounting part of the mounting base, sealing rings are respectively arranged.

6. The planing tool according to claim 5, characterized in that, A limiting tube is sleeved on the negative pressure suction pipe. One end of the limiting tube abuts against the rear end face of the horizontal mounting part of the mounting base, and the other end of the limiting tube abuts against the rib plate in the housing.

7. The planing tool according to claim 4, characterized in that, The contact surface between the horizontal mounting part of the mounting base and the motor is an inwardly concave arc surface.

8. The planing tool according to claim 4, characterized in that, The outer cutter tube is fixedly connected to the front end of the horizontal mounting part of the mounting base through a fixed connection sleeve; The water injection assembly includes a water injection pipe. One end of the water injection pipe is located inside the housing, and the other end of the water injection pipe extends out of the housing. The fixed connection sleeve is provided with a water injection connection hole. One end of the water injection pipe located inside the housing is communicated with the water injection connection hole, and the water injection connection hole is communicated with the water injection gap between the outer cutter tube and the inner cutter tube; A sealing ring and a bearing are arranged between the end of the fixed connection sleeve close to the mounting base and the inner cutter tube.

9. A drill bit structure for planing, characterized in that, One end of the inner cutter tube is coaxially and fixedly connected with a drill bit. The drill bit rotates relative to the outer cutter tube, and the internal hole of the drill bit is communicated with the internal pipeline of the inner cutter tube; The drill bit is provided with radial suction channels, which are evenly distributed along the circumferential side of the drill bit, and any one of the radial suction channels is communicated with the internal channel of the drill bit; 10. A planing drill bit assembly, characterized in that, It includes a cutter tube assembly, the cutter tube assembly includes an inner cutter tube and an outer cutter tube, and the inner cutter tube can rotate relative to the outer cutter tube; The outer cutter tube includes a double-layer tube wall, and a water injection gap is formed between the double-layer tube walls of the outer cutter tube. The drill bit connecting cylinder is provided with a water outlet hole, and the water outlet hole is communicated with the water injection gap between the double-layer tube walls; The rotating drill bit is provided with a suction channel, and the suction channel is communicated with the inner cavity of the inner cutter tube.

11. The planing bit assembly according to claim 10, wherein, It further includes a rotating drill bit, a drill bit connecting cylinder and a power transfer sleeve. One end of the drill bit connecting cylinder extends into the outer cutter tube and is fixedly connected with the outer cutter tube. One end of the rotating drill bit passes through the inside of the drill bit connecting cylinder and extends into the inner cutter tube. The rotating drill bit is coaxially fixedly connected with the inner cutter tube through the power transfer sleeve, and the rotating drill bit is rotationally matched with the drill bit connecting cylinder; The power transfer sleeve abuts against and limits one end of the drill bit connecting cylinder, and the other end of the rotating drill bit has an abutting surface that abuts against and limits the other end of the drill bit connecting cylinder.

12. A planer head for a planing tool, characterized in that, One end of the outer cutter tube is provided with an outer cutting window, and the outer cutting window is provided with outer cutting teeth. The outer cutting teeth include a plurality of continuous tooth parts, and the tooth parts of any one of the outer cutting teeth are inclined outwards; One end of the inner cutter tube is provided with an inner cutting window, and the inner cutting window is provided with inner cutting teeth. The inner cutting teeth include a plurality of continuous tooth parts, and the tooth parts of any one of the inner cutting teeth are inclined inwards.

13. A planer head for a planing tool, characterized in that, One end of the outer cutter tube is provided with an outer cutting window, and a continuous and smooth cutting edge is formed on the circumferential side of the opening of the outer cutting window; One end of the inner cutter tube is provided with an inner cutting window. One tooth part is respectively arranged on two opposite side surfaces in the axial direction of the inner cutting window, and the two tooth parts are arranged oppositely. A smooth cutting edge is formed on the circumferential side of the opening of the inner cutting window.

14. A rotary drive handle, characterized in that, It is used to be sleeved on the cutter tube assembly. The cutter tube assembly includes an inner cutter tube and an outer cutter tube sleeved on the inner cutter tube, and includes: A driving component for driving the outer cutter tube to rotate relative to the inner cutter tube. The driving component includes a driving sleeve and a hand wheel. The driving sleeve is sleeved on the outer cutter tube and is used to drive the outer cutter tube to rotate. The hand wheel is sleeved on the driving sleeve and is used to drive the driving sleeve to rotate; A limiting component for limiting the rotation of the driving sleeve and providing a gear feeling for the rotation of the outer cutter tube. The limiting component is fixedly sleeved on the cutter tube assembly, and one end of the limiting component is inserted into the hand wheel and is clamped with the driving sleeve; An elastic member for driving the hand wheel to rotate and reset, which is installed between the driving sleeve and the hand wheel.

15. A planing cutter head assembly according to claim 14, characterized in that, The limiting member includes an adapter sleeve. A plurality of limiting grooves are circumferentially and equidistantly arranged on the outer wall of the adapter sleeve. The driving sleeve is provided with an elastic limiting cylinder, and the limiting cylinder is adapted to the limiting groove. The hand wheel internally has a limiting protrusion. When the driving sleeve is in a limiting and locking state, the limiting cylinder is embedded in one of the limiting grooves, and the limiting protrusion contacts and abuts against the limiting cylinder; The outer wall of the driving sleeve is provided with an elastic member installation groove and a protrusion sliding groove. The elastic member is located in the elastic member installation groove, and the limiting protrusion is slidably arranged in the protrusion sliding groove; A front limit sleeve is installed between the driving sleeve and the knife tube assembly, the front limit sleeve is arranged on the knife tube assembly, the bushing is located in the driving sleeve, a rear limit sleeve is installed between the limit assembly and the knife tube assembly, the rear limit sleeve is arranged on the knife tube assembly, a fixing sleeve is installed between the rear limit sleeve and the front limit sleeve, and the fixing sleeve is arranged on the knife tube assembly; The proximal end of the outer knife tube is located in the limiting assembly, and the inner knife tube passes through the limiting assembly and is connected to the external power mechanism.

16. The cutter head steering structure is used to be sleeved on the cutter tube assembly, and the cutter tube assembly includes an inner cutter tube and an outer cutter tube sleeved on the inner cutter tube. It is characterized in that, The tool head steering structure includes a hand wheel, a fixed sleeve, a drive sleeve assembly and a steel ball. The drive sleeve assembly is fixedly mounted on the outer tool tube and is used to drive the outer tool tube to rotate relative to the inner tool tube. The hand wheel is in transmission connection with the driving sleeve assembly, and the rotation of the hand wheel drives the driving sleeve assembly to rotate, and the hand wheel is sleeved on the fixed sleeve; The steel ball is located inside the handwheel and is used to limit the rotation of the drive sleeve assembly; The fixing sleeve is fixedly arranged, and is used to maintain the position of the steel ball and limit the axial sliding of the driving sleeve assembly; a spring is arranged between the hand wheel and the fixing sleeve, and is used to drive the hand wheel to slide and reset.

17. The cutter head steering structure according to claim 16, characterized in that, The driving sleeve assembly includes an orientation sleeve and a retaining ring, wherein the retaining ring is fixedly sleeved on the orientation sleeve, and the rotation of the retaining ring drives the orientation sleeve to rotate, and the orientation sleeve is sleeved on the outer knife tube, and the rotation of the orientation sleeve drives the outer knife tube to rotate; The outer wall of one end of the directional sleeve is evenly provided with a plurality of arc grooves along the circumferential direction, and the hand wheel has a conical cavity inside. When the outer knife tube is in a locked state, one end of the steel ball is located in one of the arc grooves, and the inner wall of the conical cavity contacts and abuts against the steel ball. A mounting ring is provided on the outer wall of one end of the directional sleeve, a plurality of arc-shaped grooves are arranged on the mounting ring, a clamping ring is provided on one end of the directional sleeve close to the directional sleeve, the mounting ring is located inside the fixing sleeve, and the clamping ring contacts and abuts against one end of the mounting ring; The outer wall of the retaining ring is provided with a slot, the hand wheel is provided with a through hole at a position corresponding to the slot, a pin is passed through the through hole, and the pin is slidably arranged in the slot; The fixing sleeve is provided with a steel ball hole, and the steel ball is inserted into the steel ball hole; The knife tube assembly is provided with an adapter sleeve, the proximal end of the outer knife tube is located in the adapter sleeve, the proximal end of the inner knife tube passes through the adapter sleeve, the fixed sleeve is arranged on the adapter sleeve, and one end of the adapter sleeve contacts and abuts against the driving sleeve assembly.

18. Power handle, characterized in that, The power handle is sleeved on the knife tube assembly, and the knife tube assembly includes an inner knife tube and an outer knife tube sleeved on the inner knife tube, including: A driving assembly, used for driving the outer knife tube to rotate relative to the inner knife tube, the driving assembly comprises a hand wheel, a stopper sleeve and a steering sleeve, the steering sleeve is sleeved on the outer knife tube to drive the outer knife tube to rotate, the stopper sleeve is sleeved on the steering sleeve to drive the steering sleeve to rotate, and the hand wheel is sleeved on the stopper sleeve to drive the stopper sleeve to rotate; Steel ball, used to limit the rotation of the steering sleeve; A torsion spring is used to drive the hand wheel to reset and rotate, and the torsion spring is located between the stop sleeve and the hand wheel; The fixed sleeve is used to maintain the position of the steel ball and limit the steering sleeve from sliding along the axial direction. The fixed sleeve is fixedly arranged inside the hand wheel.

19. The power handle according to claim 18, wherein A plurality of steel ball grooves are circumferentially and uniformly arranged on the outer wall of the steering sleeve. The inner wall of the handwheel has steel ball relief grooves, and both the steel ball grooves and the steel ball relief grooves are adapted to the steel balls. The inner wall of the handwheel is provided with a ball pressing projection for pressing the steel balls, and the ball pressing projection is located beside the steel ball relief groove. The retaining sleeve includes a baffle plate and a connecting pipe that are coaxially and fixedly connected. The baffle plate has a limiting notch, and the inner wall of the handwheel has a limiting projection. The limiting projection is slidably arranged in the limiting notch. The connecting pipe is located inside the handwheel, and the torsion spring is sleeved on the connecting pipe. The connecting pipe has a limiting groove, and the steering sleeve is provided with a limiting post corresponding to the position of the limiting groove. The limiting post is inserted into the limiting groove. The steering sleeve is provided with a slotted ring, and the steel ball grooves are opened on the slotted ring. The slotted ring is located inside the fixed sleeve. One end of the fixed sleeve has a limiting ring, and one end of the limiting ring is in contact with and abuts against one end of the slotted ring. The fixed sleeve has a steel ball hole, and the steel balls are inserted through the steel ball holes. The power handle further includes a speed reducer. The proximal end of the inner cutter tube is connected to the speed reducer, and the proximal end of the outer cutter tube is located outside the speed reducer. The hollow interior of the inner cutter tube forms a liquid suction channel, and the gap between the inner cutter tube and the outer cutter tube forms a water injection channel.

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