Medical soft tissue planing blade assembly

Abstract

This invention discloses a medical soft tissue shaving razor assembly, including a shaving blade assembly, a reducer assembly, a housing, a suction device, and an interface portion. The shaving blade assembly comprises a hollow outer blade assembly and an inner blade assembly, with the inner blade assembly nested within the outer blade assembly. Both the outer and inner blade assemblies have an opening at one end for soft tissue suction. The reducer assembly is fixed within the housing and includes a reducer housing and a transmission gear set. The other end of the outer blade assembly is connected to the reducer housing, and the other end of the inner blade assembly is connected to the transmission gear set. The interface portion includes an inner interface and an outer interface. The inner interface is connected to the transmission gear set, and the outer interface is fixedly connected to the reducer housing. The suction device includes a negative pressure suction tube that communicates with the cavity of the inner blade assembly. This medical soft tissue shaving razor assembly, by separating the shaving blade assembly from the driver and altering the communication path of the negative pressure suction tube, effectively protects the motor from damage.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical soft tissue planing tool assembly. Background Technology

[0002] A shaving blade is a commonly used tool in minimally invasive endoscopic surgery, primarily used for shaving soft tissues in surgical procedures such as ENT, joint, urological, and gynecological surgeries. It connects to a negative pressure suction device via a suction tube, and negative pressure is transmitted through the hollow blade to the tip, drawing the soft tissue into the incision. The outer blade barrel remains stationary, while the blade rotates reciprocally driven by a motor, thus cutting the soft tissue with its cutting edge. Most existing shaving blades have a single-use design with an integrated blade and handle. The blade has a simple interface for connection to the handle. Because the blade is a disposable product, and the suction tube passes through the handle to connect to the blade, cleaning the suction channel after use is difficult, leading to blockage after repeated use. Furthermore, leakage is prone to occur when the suction tube passes through the handle, potentially damaging the motor inside the handle, thus increasing the product's operating costs. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a medical soft tissue planing shaving ...

[0004] To solve the above-mentioned technical problems, the present invention provides a medical soft tissue shaving ...

[0005] Furthermore, the housing has an assembly cavity for assembling the reducer assembly and the planer assembly. An inner interface for connecting the driver to the transmission gear set is provided on one side of the housing facing the driver. A first insertion hole for inserting the planer assembly is provided on one side of the housing facing the planer assembly. The insertion ends of the outer blade assembly pass through the first insertion hole and are fixed in the assembly cavity. The insertion end of the inner blade assembly protrudes from the insertion end of the outer blade assembly and is exposed outside the outer blade assembly. This exposed portion is connected to the output end of the transmission gear set.

[0006] Furthermore, the reducer housing includes a left reduction gearbox and a right reduction gearbox disposed within the assembly cavity, and the transmission gear set includes an input shaft that passes laterally through the left and right reduction gearboxes and is rotatable about its axis, a primary drive gear shafted to the input shaft, a transmission shaft that passes laterally through the left and right reduction gearboxes and is rotatable about its own axis, a primary driven gear shafted to the transmission shaft and meshing with the primary drive gear, a secondary drive gear shafted to the primary driven gear, and a secondary driven gear sleeved on a section of the outer periphery exposed outside the outer blade assembly and meshing with the secondary drive gear.

[0007] Furthermore, both the left and right gearboxes include a cylindrical body coaxially arranged with the planer assembly. The left end of the cylindrical body of the left gearbox is fitted into the first insertion hole. The insertion end of the outer cutter assembly extends into the cylindrical body of the left gearbox. The insertion end of the inner cutter assembly passes through the insertion end of the outer cutter assembly and extends into the cylindrical body of the right gearbox. The secondary driven gear is sleeved on the inner cutter assembly at a position between the left and right gearboxes.

[0008] Furthermore, the left gearbox has an outer blade assembly mounting hole with a larger inner diameter at one end near the first insertion hole for assembling the outer blade assembly. The outer wall of the insertion end of the outer blade assembly is connected to the wall of the outer blade assembly mounting hole. Both the left and right gearboxes have inner blade assembly mounting holes with a smaller inner diameter for assembling the inner blade assembly. The inner diameter of the inner blade assembly mounting hole is larger than the outer diameter of the inner blade assembly so that the inner blade assembly can rotate within the inner blade assembly mounting hole.

[0009] Furthermore, the adjacent ends of the cylinders of the left and right gearboxes are each provided with bearing mounting holes, and a first bearing is mounted in each of the two bearing mounting holes. The secondary driven gear is located between the two first bearings and connected to the inner rings of the two first bearings. The inner cutter assembly passes through the inner rings of the two first bearings mounted on the two cylinders, and a sealing ring is provided between the first bearing and the inner cutter assembly.

[0010] Furthermore, both the left and right gearboxes include blocks vertically mounted on the cylindrical body. Each block has a horizontally opened assembly hole, and a second bearing is mounted in each of the two assembly holes. An assembly ring groove is also formed between the assembly hole of the right gearbox and the second bearing. A sleeve is inserted into the assembly ring groove, and the outer end of the sleeve extends out of the housing. The input shaft passes through the sleeve and is connected to the inner rings of the two second bearings.

[0011] Furthermore, the negative pressure suction tube is disposed within the outer shell, with one end of the negative pressure suction tube extending into the outer shell and communicating with the insertion end of the inner knife assembly, and the other end of the negative pressure suction tube communicating with the negative pressure suction device.

[0012] Furthermore, the negative pressure suction tube is coaxially arranged with the inner knife assembly, and there is a gap between the negative pressure suction tube and the inner knife assembly. A suction stop valve is inserted on the housing at a position corresponding to the gap space. The suction stop valve has a communication hole coaxially arranged with the inner knife assembly and the negative pressure suction tube. The two ends of the communication hole can communicate with the inner knife assembly and the negative pressure suction tube after the suction stop valve is rotated.

[0013] Furthermore, the outer casing includes a left housing and a right housing that is detachably coupled to the left housing. The left gearbox and the right gearbox are respectively disposed inside the left housing and the right housing, and the right gearbox is disposed inside the right housing. The inner interface and the first insertion hole are respectively disposed on the left housing and the right housing.

[0014] The medical soft tissue planing shaving ... Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the soft tissue planing tool assembly for medical use according to the present invention.

[0016] Figure 2 This is an exploded view of one embodiment of the soft tissue planing tool assembly for medical use according to the present invention.

[0017] Figure 3 This is an assembly diagram of the blade body, the blade assembly, and the transmission gear set in one embodiment of the soft tissue planing tool assembly for medical use of the present invention.

[0018] Figure 4 This is a schematic diagram of the left and right gearboxes in one embodiment of the soft tissue planing tool assembly for medical use of the present invention.

[0019] Figure 5 This is a schematic diagram of the suction stop valve in one embodiment of the soft tissue planing tool assembly for medical use of the present invention.

[0020] The meanings of the labels in the attached diagram are as follows:

[0021] Outer shell 100; inner interface 101; first insertion hole 102; assembly cavity 110; left shell 120; mating step portion 121; right shell 130; complementary step portion 131; ring shell 132; right end shell 133; cylindrical shell 134; second insertion hole 1341; half-tube shell 135; support and limiting rib 1351; first transition hole 1352;

[0022] Transmission gear set 200; Left reduction gearbox 210; Left cylinder 211; Inner cutter assembly mounting hole 211a; Outer cutter assembly mounting hole 211b; Left bearing mounting hole 211c; First sealing ring 211d; Left block 212; Left mounting hole 212a; Left shaft hole 212b; Top stop block 213; First bearing 214; Second bearing 215; Spacer 216; Right reduction gearbox 220; Right cylinder 221; Inner cutter assembly mounting hole 221a; Right bearing mounting hole 221c; Second sealing ring 221d; Second transition hole 221e; Right block 222; Right mounting hole 222a; Right shaft hole 222b; First bearing 224; Second bearing 225; Input shaft 230; Assembly groove 231; First stage drive gear 240; Transmission shaft 250; First stage driven gear 260; Second stage drive gear 270; Second stage driven gear 280;

[0023] Planer blade assembly 300; outer blade assembly 310; inner blade assembly 320;

[0024] Negative pressure suction tube 400; spacer 410; suction stop valve 420; connecting hole 421; baffle 423; stop part 424; third annular groove 425; third sealing ring 426; ring plate 427. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] Please see Figures 1 to 5 The medical soft tissue shaving ... The other end of the inner blade assembly 320 is connected to the transmission gear set 200; the interface part includes an inner interface 101 and an outer interface (not shown in the figure). The inner interface 101 is connected to the transmission gear set 200, and the outer interface is fixedly connected to the gearbox housing. The interface assembly can be connected to the driver to transfer the kinetic energy provided by the driver to the inner blade. The suction device includes a negative pressure suction pipe 400, which communicates with the cavity of the inner blade assembly 310. When the driver is connected to the blade assembly 300, the outer side of the suction pipe contacts the driver and can remove some of the heat from the driver.

[0029] The housing 100 has an assembly cavity 110 for assembling the transmission gear set 200 and the planer assembly 300. The housing has an inner interface 101 on one side facing the driver for shaft connection between the driver and the transmission gear set 200. The housing has a first insertion hole 102 on one side facing the planer assembly 300 for inserting the planer assembly 300 therein. The first insertion hole 102 is for inserting the insertion end of the planer assembly 300 into the assembly cavity 110.

[0030] The outer casing includes a left shell 120 and a right shell 130 that is detachably coupled to the left shell 120. The left shell 120 is defined as a half-shell with its opening facing the negative pressure suction pipe 400 (hereinafter referred to as the right side) and is located near the side of the planer assembly 300. A mating step portion 121 is formed on the outer wall of the right end of the left shell 120. The right shell 130 is defined as a half-shell with its opening facing the left shell 120 and is located near the side of the negative pressure suction pipe 400. A complementary step portion 131 is formed on the inner wall of the left end of the right shell 130, which is aligned with the mating step portion 121. When the complementary step portion 131 and the mating step portion 121 are in complementary engagement, the outer wall of the right end of the left shell 120 and the outer wall of the left end of the right shell 130 smoothly transition to form an arc-shaped surface or a plane.

[0031] The left housing 120 has an overall cover structure that gradually increases in size from left to right. Its front view resembles a fish head, umbrella, or bullet shape, and its cross-section is approximately circular. Its left end is defined as a small end or a pointed end. The first insertion hole 102 extends laterally through the left end wall of the left housing 120. The bottom surface of the left housing 120 is nearly straight, and its top surface is curved upwards to the right. The space inside the left housing 120 occupies most of the space in the entire assembly cavity 110. This "most of the space" means occupying more than half of the entire assembly cavity 110, for example, 90% of the entire assembly cavity 110.

[0032] The right shell 130 has an annular shell 132 whose shape and size are adapted to the right end of the left shell 120, a right end shell 133 sealed to the right end of the annular shell 132, a cylindrical shell 134 (referring to a cylindrical shell) disposed on the right side of the right end shell 133, and a semi-tube shell 135 disposed on the right side of the cylindrical shell 134. The right end shell 133 has an inner interface 101. The internal space of the cylindrical shell 134 extends to the left through the cylindrical shell 134 and the right end shell 133 to communicate with the internal space of the annular shell 132. The cylindrical shell 134 is located below the inner interface 101 and is at the same horizontal level as the small end of the left shell 120. The right end wall of the cylindrical shell 134 has a second insertion hole 1341 for inserting the negative pressure suction tube 400. The semi-tube shell 135 is defined as a lower shell structure that is cut open along its longitudinal section and the upper shell is removed. The left end of the semi-tube shell 135 is connected to the right end of the cylindrical shell 134. The inner wall surface of the semi-tube shell 135 is provided with a support and limiting rib 1351 for supporting and limiting the negative pressure suction tube 400 (see...). Figure 1 ).

[0033] The reducer housing includes a left reduction gearbox 210 and a right reduction gearbox 220 disposed within the assembly cavity 110. The transmission gear set 200 includes an input shaft 230 that passes laterally through the left reduction gearbox 210 and the right reduction gearbox 220 and is rotatable about its axis; a first-stage drive gear 240 shafted to the input shaft 230; a transmission shaft 250 that passes laterally through the left reduction gearbox 210 and the right reduction gearbox 220 and is rotatable about its own axis; a first-stage driven gear 260 shafted to the transmission shaft 250 and meshing with the first-stage drive gear 240; a second-stage drive gear 270 shafted to the first-stage driven gear 260; and a gear sleeved on the planer assembly 3. A secondary driven gear 280 is inserted into the outer periphery of the assembly cavity 110. The outer end of the input shaft 230 passes outward into the inner interface 101 for detachable connection with the output end of the driver. A section of the input shaft 230 located between the left reduction gearbox 210 and the right reduction gearbox 220 is used to sleeve the primary drive gear 240 to transmit the rotational motion to the primary drive gear 240. The primary drive gear 240 transmits the rotational motion to the planer assembly 300 through the primary driven gear 260, the secondary drive gear 270, and the secondary driven gear 280, thereby causing the planer assembly 300 to reciprocate with the driver.

[0034] The left reduction gearbox 210 has a left cylindrical body 211 coaxially arranged with the first insertion hole 102 and a left block 212 forming the right end of the left cylindrical body 211. The right end face of the left block 212 and the right end face of the left cylindrical body 211 are located in the same plane. The left end outer wall of the left cylindrical body 211 is inserted into the first insertion hole 102. The left cylindrical body 211 has an inner blade assembly mounting hole 211a that extends through its axial direction for assembling the inner blade assembly of the planer assembly 300. The left end of the left cylindrical body 211 has an outer blade assembly mounting hole 211b with an inner diameter larger than the inner diameter of the inner blade assembly mounting hole 211a. The outer blade assembly mounting hole 211b is coaxial with the inner blade assembly mounting hole 211a. The right end of the left cylinder 211 has a left bearing assembly hole 211c that is coaxial with the inner knife assembly assembly hole 211a and has an inner diameter larger than that of the inner knife assembly assembly hole 211a. A first bearing 214 is assembled in the left bearing assembly hole 211c. The left end of the left bearing assembly hole 211c is also coaxially provided with a first annular groove with an inner diameter larger than that of the inner knife assembly assembly hole 211a and smaller than that of the left bearing assembly hole 211c. A first sealing ring 211d is assembled in the first annular groove.

[0035] The left block 212 is provided with a left mounting hole 212a and a left shaft hole 212b from top to bottom. The left mounting hole 212a is coaxially arranged with the inner interface 101. A second bearing 215 is installed in the left mounting hole 212a. The left shaft hole 212b is used to assemble the left end of the transmission shaft 250. The axes of the left mounting hole 212a and the left shaft hole 212b are parallel to the axis of the left cylinder 211. A top stop 213 extends to the right from the upper end of the left block 212. The right end face of the top stop 213 protrudes from the right end face of the left block 212. The right end face of the top stop 213 abuts against the left end face of the right gearbox 220 body, thereby forming a gap space 216 between the right end face of the left block 212 body and the left end face of the right gearbox 220 body. The first-stage driving gear 240, the first-stage driven gear 260, the second-stage driving gear 270, and the second-stage driven gear 280 are all assembled in the gap space 216.

[0036] The right gearbox 220 has a right cylinder 221 coaxially arranged with the left cylinder 211 and a right block 222 forming the left end of the right cylinder 221. The left end face of the right block 222 and the left end face of the right cylinder 221 are located in the same plane. The right end of the right cylinder 221 extends into the shell 134. The right cylinder 221 has an inner blade assembly mounting hole 221a that passes through it along its axial direction for assembling the inner blade assembly of the planer assembly 300. The left end of the right cylinder 221 forms a right bearing assembly hole 221c that is coaxial with the inner blade assembly mounting hole 221a and has an inner diameter larger than that of the inner blade assembly mounting hole 221a. A first bearing 224 is assembled in the right bearing assembly hole 221c. The right end of the right bearing assembly hole 221c is also coaxially provided with a second annular groove that has an inner diameter larger than that of the inner blade assembly mounting hole 221a and smaller than that of the right bearing assembly hole 221c. A second sealing ring 221d is assembled in the second annular groove.

[0037] The right block 222 is provided with a right assembly hole 222a and a right shaft hole 222b from top to bottom. The right assembly hole 222a and the right shaft hole 222b are symmetrically arranged with the left assembly hole 212a and the left shaft hole 212b. A second bearing 225 is assembled in the right assembly hole 222a. An assembly ring groove is formed between the second bearing 225 and the right assembly hole 222a. A sleeve is inserted in the assembly ring groove. The outer end of the sleeve extends out of the housing. The input shaft 230 passes through the sleeve and is connected to the inner rings of the two second bearings 215 and 225.

[0038] The input shaft 230 has a large-diameter section and a small-diameter section. The large-diameter section passes through the inner interface 101 and has an assembly groove 231 at its outer end that is detachably connected to the output shaft of the driver. The small-diameter section passes through the inner ring of the second bearing 225 in the right assembly hole 222a and the inner ring of the second bearing 215 in the left assembly hole 212a. The first-stage drive gear 240 is arranged around the outer periphery of a section of the small-diameter section located in the interval space 216. The left and right ends of the drive shaft 250 are respectively fitted into the left shaft hole 212b and the right shaft hole 222b. The secondary drive gear 270 is a section of the drive shaft 250 located in the interval space 216. The primary driven gear 260 is a ring fitted onto the secondary drive gear 270. The secondary driven gear 280 is a ring fitted onto the planer assembly 300 located in the interval space 216. That is, the secondary driven gear 280 is located between the two first bearings 214 and 224 and is connected to the inner rings of the two first bearings 214 and 224.

[0039] The planer assembly 300 includes an outer planer assembly 310 fixed to the planer body 100 and an inner planer assembly 320 disposed within the outer planer assembly 310 and rotatable about its axis. The outer planer assembly 310 and the inner planer assembly 320 are adapted to each other in shape and structure, except that the inner diameter of the outer planer assembly 310 is larger than the outer diameter of the inner planer assembly 320, and the length of the outer planer assembly 310 is smaller than the length of the inner planer assembly 320. This allows the inner planer assembly 320 to reciprocate when it is assembled within the outer planer assembly 310, so that the insertion end (right end) of the inner planer assembly 320 extends to the right beyond the outer planer assembly 310. The inner planer assembly 320 passes through the inner rings of the two first bearings 214 and 224 assembled within the two cylinders.

[0040] Both the outer blade assembly 310 and the inner blade assembly 320 have a cutting edge 330 at their open ends (left ends). The cutting edge 330 has teeth and communicates with the internal space of the blade cylinder. Both the outer blade assembly 310 and the inner blade assembly 320 have openings at their insertion ends. The inner blade assembly 320 extends from the opening of the outer blade assembly 310, and the opening of the inner blade assembly 320 allows the cutting edge 330 to communicate with the negative pressure suction pipe 400. The structure of the planer assembly 300 can refer to existing known structures and will not be described in detail here.

[0041] The insertion end of the outer cutter assembly 310 extends into the cylinder of the left gearbox 210, and the outer wall of the insertion end of the outer cutter assembly 310 is connected to the wall of the outer cutter assembly mounting hole 211b. The insertion end of the inner cutter assembly 320 passes through the insertion end of the outer cutter assembly 310 and extends into the inner cutter assembly mounting hole 221a of the left gearbox 210 and the right gearbox 220. The inner diameter of the inner cutter assembly mounting hole 221a is larger than the outer diameter of the inner cutter assembly 320 so that the inner cutter assembly 320 can rotate within the inner cutter assembly mounting hole 221a. The aforementioned secondary driven gear 280 is sleeved on the inner cutter assembly 320 at a position (space 216) between the left gearbox 210 and the right gearbox 220.

[0042] The negative pressure suction tube 400 is disposed in the semi-tube shell 135 and supported and limited by the supporting and limiting rib 1351. The negative pressure suction tube 400 is coaxially arranged with the inner knife assembly 320. One end of the negative pressure suction tube 400 extends into the shell and communicates with the insertion end of the inner knife assembly 320, and the other end of the negative pressure suction tube 400 communicates with the negative pressure suction device (not shown in the figure). Specifically, one end of the negative pressure suction tube 400 passes through the second insertion hole 1341 on the right end wall and the opening of the right cylinder 221 in sequence and extends into the right cylinder 221, with a gap space 410 between it and the inner knife assembly 320 inside the right cylinder 221. Corresponding to the interval space 410, a suction stop valve 420 is inserted on the housing at a position corresponding to the interval space 410. The suction stop valve 420 has a communication hole 421 coaxially arranged with the inner knife assembly 320 and the negative pressure suction tube 400. The two ends of the communication hole 421 can communicate with the inner knife assembly 320 and the negative pressure suction tube 400 after the suction stop valve 420 is rotated. Specifically, the right housing 130 has a first adapter hole 1352 on its half-tube shell 135 for connecting the suction stop valve 420. The axis of the first adapter hole 1352 is perpendicular to the axis of the half-tube shell 135. The right cylinder 221 has a second adapter hole 221e coaxial with the first adapter hole 1352. The suction stop valve 420 has an adapter shaft 422 passing through the first adapter hole 1352 and the second adapter hole 221e, a baffle 423 on the outer end face of the adapter shaft 422 to block the first adapter hole 1352, an annular piece 427 on the adapter shaft 422 and located in the second adapter hole 221e, and a stop portion 424 on the inner end of the adapter shaft 422. The connecting hole 421 is provided on the stop portion 424. The outer end face of the stop portion 424, a section of the adapter shaft 422 located between the stop portion 424 and the ring piece 427, and the ring piece 427 together form a third annular groove 425. A third sealing ring 426 for sealing the second adapter hole 221e is assembled in the third annular groove 425.

[0043] The medical soft tissue planing shaving ...

[0044] The above are merely embodiments of the present invention, and common knowledge such as specific structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention, without affecting the effectiveness of the implementation of the present invention or its practicality.

Claims

1. A medical soft tissue planing blade assembly, characterized by: The shaver assembly comprises a shaver assembly, a reducer assembly, an outer housing, a suction device, an interface part, the shaver assembly comprises a hollow outer cutter assembly and an inner cutter assembly, the inner cutter assembly is sleeved in the outer cutter assembly, one end of the outer cutter assembly and the inner cutter assembly is provided with a soft tissue inhalable opening, the reducer assembly is fixed in the outer housing, the reducer assembly comprises a reducer housing and a transmission gear set, the other end of the outer cutter assembly is connected with the reducer housing, and the other end of the inner cutter assembly is connected with the transmission gear set; the interface part comprises an inner interface and an outer interface, the inner interface is connected with the transmission gear set, and the outer interface is fixedly connected with the reducer housing; the interface assembly can be connected with the driver to transmit the kinetic energy provided by the driver to the inner cutter assembly; the suction device comprises a negative pressure suction pipe, the negative pressure suction pipe is communicated with the cavity of the inner cutter assembly, and the outer side of the negative pressure suction pipe is in contact with the driver after the driver is connected to the shaver assembly to take away part of the heat of the driver; the outer housing is formed with an assembly cavity for assembling the reducer assembly and the shaver assembly, one side of the outer housing towards the driver is provided with an inner interface for connecting the driver with the transmission gear set, one side of the outer housing towards the shaver assembly is provided with a first insertion hole for inserting the shaver assembly therein, the insertion end of the outer cutter assembly is fixed in the assembly cavity after penetrating through the first insertion hole, the insertion end of the inner cutter assembly penetrates through the insertion end of the outer cutter assembly to be exposed outside the outer cutter assembly, and the exposed part outside the outer cutter assembly is connected with the output end of the transmission gear set; the negative pressure suction pipe is arranged in the outer housing, one end of the negative pressure suction pipe extends into the outer housing and is communicated with the insertion end of the inner cutter assembly, and the other end of the negative pressure suction pipe is communicated with the negative pressure suction device; the negative pressure suction pipe is coaxially arranged with the inner cutter assembly, and there is a spacing space between the negative pressure suction pipe and the inner cutter assembly, a suction valve is inserted into the spacing space of the outer housing, the suction valve has a communication hole coaxially arranged with the inner cutter assembly and the negative pressure suction pipe, and the two ends of the communication hole can be communicated with the inner cutter assembly and the negative pressure suction pipe after the suction valve rotates.

2. The medical soft tissue planing blade assembly of claim 1, wherein: The reducer housing comprises left and right reducer boxes arranged in the assembly cavity, the transmission gear set comprises an input shaft transversely arranged on the left and right reducer boxes and capable of rotating around the axis, a primary driving gear shaft-connected to the input shaft, a transmission shaft transversely arranged on the left and right reducer boxes and capable of rotating around the axis, a primary driven gear shaft-connected to the transmission shaft and engaged with the primary driving gear, a secondary driving gear shaft-connected to the primary driven gear, and a secondary driven gear sleeved on the outer periphery of the exposed part outside the outer cutter assembly and engaged with the secondary driving gear.

3. The medical soft tissue planing blade assembly of claim 2, wherein: The left reduction box and the right reduction box each include a barrel coaxial with the planing tool assembly, the left end of the barrel of the left reduction box is fitted into the first insertion hole, the insertion end of the outer tool assembly extends into the barrel of the left reduction box, the insertion end of the inner tool assembly extends out of the insertion end of the outer tool assembly and extends into the barrel of the right reduction box, and the secondary driven gear is sleeved on the inner tool assembly at a position between the left reduction box and the right reduction box.

4. The medical soft tissue planing blade assembly of claim 3, wherein: The barrel of the left reduction box has an outer tool assembly fitting hole with a larger inner diameter at an end close to the first insertion hole for fitting the outer tool assembly, the outer wall of the insertion end of the outer tool assembly is connected with the hole wall of the outer tool assembly fitting hole, the barrels of the left reduction box and the right reduction box each have an inner tool assembly fitting hole with a smaller inner diameter for fitting the inner tool assembly, and the inner diameter of the inner tool assembly fitting hole is larger than the outer diameter of the inner tool assembly so that the inner tool assembly can rotate in the inner tool assembly fitting hole.

5. The medical soft tissue planing blade assembly of claim 3, wherein: The adjacent ends of the barrels of the left reduction box and the right reduction box each have a bearing fitting hole, the first bearings are fitted in the bearing fitting holes, the secondary driven gear is located between the first bearings and is connected with the inner rings of the first bearings, the inner tool assembly is arranged in the inner rings of the first bearings fitted on the barrels, and a sealing ring is arranged between the first bearings and the inner tool assembly.

6. The medical soft tissue planing blade assembly of claim 3, wherein: The left reduction box and the right reduction box each further include a block vertically arranged on the barrel, the blocks each have a fitting hole transversely formed therein, the second bearings are fitted in the fitting holes, the fitting hole of the right reduction box and the second bearing form a fitting ring groove therebetween, a sleeve is inserted in the fitting ring groove, the outer end of the sleeve extends out of the outer shell, and the input shaft is arranged in the sleeve and is connected with the inner rings of the second bearings.

7. The medical soft tissue planing blade assembly of claim 2, wherein: The outer shell includes a left shell and a right shell detachably coupled with the left shell, the left reduction box and the right reduction box are arranged in the left shell and the right shell respectively, the right reduction box is arranged in the right shell, and the inner interface and the first insertion hole are arranged on the left shell and the right shell respectively.

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