Planing / grinding handle, cutter assembly and surgical power device

Abstract

The utility model provides a planing / grinding handle, a cutter assembly and an operation power device, and relates to the technical field of operation equipment, the planing / grinding handle comprises a handle body and an output pipe, and the handle body is provided with an inner cavity; the motor assembly is arranged in the inner cavity and comprises a motor shell and an inner pipe rotationally arranged in the motor shell. The output pipe is fixedly arranged relative to the motor shell, the rear end of the output pipe extends out of the rear end of the handle body, the output pipe is used for being connected with an external pipeline, and the front end of the output pipe is inserted and hermetically communicated with the rear end of the inner pipe; the cutter assembly comprises an outer cutter tube and an inner cutter tube, the outer cutter tube is connected with the handle body, the inner cutter tube is rotatably arranged in the outer cutter tube in a penetrating mode, and the rear end of the inner cutter tube is coaxial with the inner tube and is in transmission connection with the inner tube. According to the planing / grinding operation handle, additional transmission mechanisms such as a gear set do not need to be additionally arranged, an additional switching structure does not need to be arranged between the inner knife tube and the output channel, the structure is simple, and the whole structure of the planing / grinding operation handle can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical equipment, in particular to a shaving / grinding handle, a tool assembly and a surgical power device. Background Art

[0002] A shaving tool generally includes an outer cutter tube and an inner cutter tube sleeved in the outer cutter tube. A cutting opening is arranged at the front end of the outer cutter tube, so that the cutting window at the front end of the inner cutter tube can be exposed. When the inner cutter tube rotates, the cutting edge formed by the edge of the cutting window of the inner cutter tube can cut tissues to complete the operation; for some grinding tools, the inner cutter tube is connected with a grinding head, and the front ends of the grinding head and the inner cutter tube are exposed at the front end of the outer cutter tube. A tissue inlet for tissues to enter the inner cutter tube is arranged at the front end of the inner cutter tube. During the operation, the tail end of the inner cutter tube can be connected with an output channel, and the output channel is further connected with a negative pressure device to suck the cut tissues for subsequent detection such as pathological grading.

[0003] In some existing shaving / grinding surgical handles, the output channel and the inner cutter tube are coaxially arranged, and the rotation axis of the motor assembly is offset from the extending direction of the inner cutter tube. The motor assembly needs to drive the inner cutter tube through an additional transmission mechanism such as a gear set, resulting in a complex structure of the entire surgical power device; furthermore, in the existing shaving / grinding surgical handles, in order to discharge the tissues and waste liquid in the output channel from the device, a lot of adapter parts are configured, resulting in a complex structure of the entire device and easy blockage. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a shaving / grinding handle, a tool assembly and a surgical power device, which are used to solve the problems of complex structure and easy blockage of the electric surgical cutting tool in the prior art.

[0005] To achieve the above purpose and other related purposes, the present utility model provides a shaving / grinding handle adapted to a tool assembly. The tool assembly includes an outer cutter tube and an inner cutter tube rotatably arranged in the outer cutter tube. The shaving / grinding handle includes:

[0006] A handle body having a motor installation cavity and a tool installation channel communicating with each other;

[0007] A motor assembly arranged in the motor installation cavity. The motor assembly includes a motor housing and an inner tube rotatably arranged in the motor housing;

[0008] An output tube fixedly arranged relative to the motor housing. The rear end of the output tube extends out of the rear end of the handle body. The output tube is used to connect with an external pipeline, and the front end of the output tube is plugged and sealed with the rear end of the inner tube;

[0009] Wherein, when the tool assembly is installed in the tool installation channel, the rear end of the inner tool tube is coaxial with and drivingly connected to the inner tube, and the inner tube and the inner tool tube are communicated through abutting or inserting of the front end of the inner tube against the rear end of the inner tool tube.

[0010] Optionally, the inner tube has a hollow channel extending along the axis direction of the inner tube. When the tool assembly is installed in the tool installation channel, the rear end of the inner tool tube is inserted into the hollow channel at the front end of the inner tube.

[0011] The inner diameters corresponding to the rear end of the inner tool tube at each cross-section are equal, the inner diameters corresponding to the front end of the inner tube at each cross-section are equal, and the inner diameter of the inner tool tube is smaller than the inner diameter of the inner tube.

[0012] Optionally, a first connecting member is provided on the rear end of the inner tool tube, and a second connecting member is provided on the front end of the inner tube.

[0013] When the tool assembly is installed in the tool installation channel, a connection gap is formed between the inner tube and the inner tool tube. The connection gap is an annular gap. A first sealing cavity communicating with the connection gap is formed between the first connecting member and the second connecting member, and a first sealing ring for blocking the connection gap is arranged in the first sealing cavity.

[0014] A torque transmission structure is arranged between the first connecting member and the second connecting member, and the inner tube drives the inner tool tube to rotate through the torque transmission structure.

[0015] Optionally, the front end of the output tube has a docking hole communicating with the inside of the output tube. The rear end of the inner tube is inserted into the docking hole, and a first rotation gap is formed between the rotation profile at the rear end of the inner tube and the inner wall of the docking hole.

[0016] Optionally, the end of the inner tube extends out of the rear end of the motor housing and forms a rear extension section. A second rotation gap is formed between the outer wall of the rear extension section and the motor housing, and a second sealing ring for blocking both the first rotation gap and the second rotation gap is arranged on the rear extension section.

[0017] Optionally, an installation hole coaxial with the axis direction of the motor assembly is provided on the motor housing near one end of the output tube, and the front end of the output tube is connected in the installation hole.

[0018] Wherein, the inner wall of the installation hole is provided with threads, and the front end of the output tube is in threaded fit with the installation hole; and / or, a sealing space including the second sealing cavity and the first rotation gap is jointly formed by the inner wall of the docking hole, the inner wall of the installation hole and the outer wall of the inner tube, and the second sealing ring is arranged in the second sealing cavity.

[0019] Optionally, the motor housing includes a housing body and a rear fixing sleeve detachably sleeved on the rear end of the housing body, and the mounting hole is formed in the rear fixing sleeve.

[0020] Optionally, the handle body includes a handle main body and a rear end cover at the rear end of the handle main body. A locking nut sleeve is sleeved on the output pipe through a thread, and the locking nut sleeve presses the rear end cover against the rear end of the handle main body.

[0021] Optionally, the output pipe has a main channel communicating with the docking hole, and the inner diameter of the main channel is greater than or equal to the inner diameter of the inner pipe; and / or, the outer diameter of the inner pipe is greater than the inner diameter of the main channel.

[0022] Optionally, the end of the inner pipe extends out of the front end of the motor housing to form a front extension section. There is a third rotational clearance between the outer wall of the front extension section and the motor housing. A sealing assembly is sleeved on the front extension section, and the sealing assembly is in sealing contact with the outer wall of the front extension section and the inner wall of the motor installation cavity respectively.

[0023] Optionally, the sealing assembly includes:

[0024] A first component, which is sleeved outside the extension section and at least covers the corresponding end of the motor housing. The first component is arranged in the motor installation cavity, and a third sealing cavity communicating with the third rotational clearance is formed between the inner wall of the first component and the motor housing.

[0025] A third sealing ring, which is arranged in the third sealing cavity. The inner side wall of the third sealing ring is in sealing contact with the outer wall of the front extension section, and the outer side wall of the third sealing ring is in sealing contact with the inner wall of the first component.

[0026] A fourth sealing ring, which is arranged on the first component and is in sealing contact with the inner wall of the motor installation cavity to seal the gap between the inner wall of the motor installation cavity and the first component.

[0027] The present utility model further provides a surgical power device, which includes a shaving / grinding handle as described in any one of the above and a tool assembly adapted to the shaving / grinding handle.

[0028] The present utility model further provides a tool assembly, and the tool assembly is adapted to the shaving / grinding handle as described in any one of the above.

[0029] As described above, the planing / grinding handle, tool assembly, and surgical power device of the present invention have the following beneficial effects: since an inner tube is provided inside the rotor, the inner tube is coaxially arranged with the rotor and rotates with the rotor, the rear end of the inner knife tube is coaxial with the inner tube, the front end of the inner tube is transmission-connected and sealed to the rear end of the inner knife tube, and the rear end of the inner tube is directly and sealedly connected to the front end of the output tube.

[0030] Therefore, the inner tube of the planing / grinding surgical handle of the present invention can directly drive the inner blade tube to rotate. Compared with the technical solution in the prior art in which the rotation axis of the motor assembly is offset from the extension direction of the inner blade tube, there is no need to set up additional transmission mechanisms such as gear sets, resulting in a simple structure and a simplified overall structure of the planing / grinding surgical handle. At the same time, waste liquid, cut tissue, etc. in the inner blade tube of the planing / grinding surgical handle of the present invention can be directly transferred through the inner tube and output tube arranged in sequence. Compared with the technical solution in the prior art in which the output channel and the inner blade tube are offset, there is no additional transfer structure between the inner blade tube and the output channel, resulting in a simple structure and a simplification of the overall structure of the planing / grinding surgical handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic cross-sectional view of the surgical power device in an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the cross-sectional structure of the handle in the embodiment of the present utility model;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of the handle body in an embodiment of the present utility model;

[0034] Figure 4 This is a schematic cross-sectional view of the motor assembly in an embodiment of the present utility model;

[0035] Figure 5 This is a schematic cross-sectional view of the tool assembly in an embodiment of the present utility model;

[0036] Figure 6 This is a schematic structural diagram of the connection between the first connecting member and the second connecting member in an embodiment of the present utility model;

[0037] Figure 7 This is a schematic structural diagram of the first sealed cavity in an embodiment of the present utility model;

[0038] Figure 8 This is a structural diagram of the first connecting member in an embodiment of the present utility model;

[0039] Figure 9 This is a structural diagram of the motor assembly at the third sealing ring in an embodiment of the present utility model;

[0040] Figure 10 Structural schematic diagram of the first sealing cavity in the embodiment of the present utility model;

[0041] Figure 11 Structural schematic diagram of the motor assembly and the output pipe in the embodiment of the present utility model;

[0042] Figure 12 Structural schematic diagram of the output pipe in the embodiment of the present utility model;

[0043] Figure 13 Structural schematic diagram of the docking hole in the embodiment of the present utility model;

[0044] Figure 14 Structural schematic diagram of the second sealing ring in the embodiment of the present utility model;

[0045] Figure 15 Structural schematic diagram of the second sealing cavity in the embodiment of the present utility model;

[0046] Figure 16 Structural schematic diagram of the rear fixing sleeve in the embodiment of the present utility model;

[0047] Figure 17 Partial enlarged structural schematic diagram of the motor assembly at the second sealing ring in the embodiment of the present utility model;

[0048] Figure 18 Partial enlarged structural schematic diagram of the third sealing ring in the embodiment of the present utility model;

[0049] Figure 19 Structural schematic diagram of the fifth sealing ring in the embodiment of the present utility model;

[0050] Figure 20 Partial enlarged structural schematic diagram of the fifth sealing ring in the embodiment of the present utility model;

[0051] Figure 21 Partial enlarged structural schematic diagram of the second sealing ring in the embodiment of the present utility model.

[0052] Explanation of reference numerals: first sealing ring 1, first sealing cavity 2, second sealing ring 3, first blocking portion 3a, second blocking portion 3b, second sealing cavity 4, third sealing ring 5, first sealing lip 5a, second sealing lip 5b, annular structural groove 5c, elastic support 5d, primary sealing portion 5e, secondary sealing portion 5f, third sealing cavity 6, first rotating gap 7, second rotating gap 8, third rotating gap 9, motor assembly 10, inner tube 11, first connecting member 12, first component 13, second component 14 , rear fixing sleeve 15, rear end cover 16, locking screw sleeve 17, mounting hole 18, fourth sealing ring 19, tool assembly 20, outer tool tube 21, inner tool tube 22, hollow channel 22a, cutting opening 23, second connecting piece 24, card slot 25, connecting sleeve 26, anti-slip groove 27, output pipe 30, main channel 31, first hole section 32, second hole section 33, docking hole 34, handle body 40, mounting channel 41, card bead 42, motor mounting cavity 43, fifth sealing ring 50, skeleton 51, sealing protrusion 52. DETAILED DESCRIPTION

[0053] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0054] It should be noted that the diagrams provided in the present embodiment are only for schematic illustration of the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the restrictive conditions that can be implemented in this utility model. Therefore, they have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the effect and purpose that can be achieved by the present invention. It should also be noted that in the description of this specification, "rear" refers to the direction of the device or component close to the operator, and "front" refers to the direction of the device or component away from the operator. “Before” and “after” are only used for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments to their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0055] See alsoFigures 1 to 2 This embodiment provides a planing / grinding handle, including a motor assembly 10, a handle body 40, and an output tube 30. The handle body 40 has a tool installation channel 41 and a motor installation cavity 43 for installing the motor assembly 10, and the tool installation channel 41 is connected to the motor installation cavity 43.

[0056] The motor assembly 10 includes a motor housing and an inner tube 11 rotatably disposed within the motor housing. The motor housing typically also houses a rotor and stator (not shown), which cooperate with the rotor to enable rotation. In this embodiment, the inner tube 11 is disposed within the rotor, coaxially arranged with the rotor and rotating therewith. The output tube 30 is fixed relative to the motor housing. The front end of the output tube 30 is in direct, sealed communication with the rear end of the inner tube 11, and the rear end of the output tube 30 is connected to an external pipeline.

[0057] In this embodiment, the motor assembly 10 is fixedly disposed in the motor mounting cavity 43 , and the rear end of the output tube 30 extends out of the rear end of the handle body 40 .

[0058] In this embodiment, the tool assembly 20 includes an outer blade tube 21 and an inner blade tube 22. The outer blade tube 21 is connected to the motor housing, and the inner blade tube 22 is rotatably inserted into the outer blade tube 21. When the tool assembly 20 is installed in the tool installation channel 41 and the handle 40 is connected to the tool assembly 20, the rear end of the inner blade tube 22 is coaxial with the inner tube 11, and the front end of the inner tube 11 is drivingly connected to the rear end of the inner blade tube 22 and is sealed.

[0059] Therefore, in this embodiment, the inner tube 11 can directly drive the inner blade tube 22 to rotate, eliminating the need for additional transmission mechanisms such as gear sets. This simplifies the structure and simplifies the overall structure of the surgical power unit. Furthermore, waste fluids and cut tissue in the inner blade tube 22 of the surgical power unit can be directly transferred through the sequentially arranged inner tube 11 and output tube 30. No additional transition structure is required between the inner blade tube 22 and the output channel, resulting in a simple structure that helps simplify the overall structure of the surgical power unit.

[0060] In this embodiment, the tool installation passage 41 communicates with the motor installation cavity 43. This passage 41 is located in front of the inner tube 11. One end of the passage 41 has an opening for the entry and exit of the tool assembly 20. The other end of the passage 41 connects to the motor assembly 10, allowing the tool assembly 20 to connect to the motor assembly 10. The handle 40 connects and supports the motor assembly 10, tool assembly 20, and output tube 30, providing protection and making it easier for the operator to grip.

[0061] The blade assembly is removably inserted into the tool installation channel 41 of the handle body 40 for installation within the handle body 40. The motor assembly 10 in the handle body 40 drives the inner blade tube 22 of the blade assembly 20 to rotate to perform cutting operations. When the blade assembly is inserted into the tool installation channel 41 and the motor assembly 10 is connected to the blade assembly 20, the outer blade tube 21 is connected to the handle body 40 via the outer tool handle. The inner tube 11 is at least coaxial with the rear end of the inner blade tube 22 and is transmission-connected thereto. The inner tube 11 and the inner blade tube 22 are connected by abutting or plugging the front end of the inner tube 11 with the rear end of the inner blade tube 22.

[0062] It is worth mentioning that the above-mentioned "tool assembly 20" can be a planer, and a cutting opening 23 is provided at the front end of the outer tool tube 21 of the planer, so that the cutting window at the front end of the inner tool tube 22 can leak out. When the inner tool tube 22 rotates, the cutting edge formed by the edge of the cutting window of the inner tool tube 22 can cut the tissue, and the tissue enters the inner tool tube 22 through the cutting window and is drawn out through the inner tube 11; the above-mentioned "tool assembly 20" can also be a drill bit with a tissue channel (not shown in the figure), and a cutting head is provided at the front end of the inner tool tube 22 of the drill bit, and a tissue entrance is provided on the side wall of the inner tool tube 22, and the cutting head is at least partially exposed at the front end of the outer tool tube 21. When the inner tool tube 22 rotates, the cutting head grinds the tissue for tissue cutting, and the tissue enters the inner tool tube 22 through the tissue entrance and is drawn out through the inner tube 11.

[0063] It should be noted that the above-mentioned "connection between the handle body 40 and the outer blade tube 21" can be carried out in various ways. For example, in some embodiments, the outer blade tube 21 and the handle body 40 are relatively fixedly connected. In other embodiments, the handle body 40 is provided with an adjustment structure for adjusting the rotation direction of the outer blade tube 21, so that the outer blade tube 21 rotates relative to the inner blade tube 22, thereby adjusting the cutting direction.

[0064] It should be noted that the aforementioned "inner tube 11 is at least coaxial with the rear end of the inner blade tube 22" can be achieved in at least two ways: for example, in some embodiments, the central axis of the tool assembly 20 is divided into two sections, front and rear, with the central axis forming a bend angle between the two sections. The inner blade tube 22 can be rotated within the curved outer blade tube 21 by using a structure such as a multi-layer hose. In this case, the inner tube 11 is coaxial with the rear end of the inner blade tube 22, but not with the front end of the inner blade tube 22. In this embodiment, the tool assembly 20 adapted to the handle 40 is linear, and the inner blade tube 22 is coaxial with the outer blade tube 21, thereby making the entire inner blade tube 22 coaxial with the inner tube 11.

[0065] In this embodiment, since the inner knife tube 22 is directly connected to the inner tube 11 without an additional transition structure, it is beneficial to simplify the overall structure of the surgical power device.

[0066] like Figures 1 to 8As shown, in this embodiment, the inner tube 11 has a hollow channel 22a extending along the axial direction of the inner tube 11. When the tool assembly 20 is installed in the tool installation channel 41 and the shank 40 is connected to the tool assembly 20, the rear end of the inner cutter tube 22 is inserted into the hollow channel 22a, so that the inner channel of the inner cutter tube 22 is directly communicated with the hollow channel 22a inside the inner tube 11. In this way, the inner diameter of the inner tube 11 is larger, and under the action of negative pressure, the waste liquid and tissue fluid in the inner cutter tube 22 can directly enter the inner tube 11 and be discharged, which is beneficial to reducing the possibility of blockage when substances such as tissue and waste liquid in the inner cutter tube 22 pass through the connection part between the inner cutter tube 22 and the inner tube 11.

[0067] In this embodiment, the inner diameter of the inner cutter tube 22 corresponding to each cross-section is equal, the inner diameter of the inner tube 11 corresponding to each cross-section is equal, and the inner diameter of the inner cutter tube 22 is smaller than the inner diameter of the inner tube 11, that is, the radial dimension of the inner hollow channel of the inner cutter tube 22 is smaller than the radial dimension of the hollow channel 22a of the inner tube 11. In this way, along the suction direction from front to back, the suction channel jointly formed by the inner cutter tube 22 and the inner tube 11 as a whole presents a channel that is smaller in the front and larger in the back, which is beneficial to avoiding blockage. Of course, it is not excluded that the inner diameter of the inner cutter tube 22 gradually increases in the front-to-back direction and / or the inner diameter of the inner tube 11 gradually increases in the front-to-back direction, both of which are beneficial to avoiding blockage.

[0068] In this embodiment, when the tool assembly 20 is installed in the tool installation channel 41 and the shank 40 is connected to the tool assembly 20, a connection gap is formed between the inner tube 11 and the inner cutter tube 22, and a sealing structure for forming a sealed connection gap is formed between the inner tube 11 and the inner cutter tube 22.

[0069] Specifically, as Figures 6 to 8 shown, in this embodiment, a first connecting member 12 is provided at the rear end of the inner cutter tube 22, and a second connecting member 24 is provided at the front end of the inner tube 11. The connection gap is formed between the first connecting member 12 and the second connecting member 24, and the sealing structure includes a first sealing ring 1 provided between the first connecting member 12 and the second connecting member 24, and the first sealing ring 1 seals the connection gap.

[0070] In the existing tool assembly 20, the rear end of the first connecting member 12 is further back than the rear end of the inner cutter tube 22. Using the inner cavity of the first connecting member 12 as a part of the suction channel, in order to enable the rear end of the inner cutter tube 22 to be inserted into the hollow channel 22a when the shank 40 is connected to the tool assembly 20, so as to achieve the purpose of reducing the blockage when substances such as tissue and waste liquid in the inner cutter tube 22 pass through the connection part between the inner cutter tube 22 and the inner tube 11, the tool assembly 20 is improved in this embodiment, and the tool assembly 20 adopts the following structure:

[0071] In this embodiment, the inner cutter tube 22 receives rotational power from the motor assembly 10 through the first connecting member 12. The first connecting member 12 rotates together with the inner cutter tube 22. The inner cutter tube 22 has a connecting section that extends backward out of the first connecting member 12. In such a cutter assembly 20, since the connecting section extends out of the first connecting member 12, the inner cutter tube 22 can directly extend into the inner tube 11, thereby reducing the possibility of blockage at the connection between the inner cutter tube 22 and the inner tube 11.

[0072] In some embodiments, when the handle body 40 is connected to the cutter assembly 20, the end faces of the inner cutter tube 22 and the inner tube 11 are butted (abutted) against each other, and the connection gap includes the gap between the end faces of the inner cutter tube 22 and the inner tube 11. In other embodiments, when the handle body 40 is connected to the cutter assembly 20, the inner tube 11 and the inner cutter tube 22 are inserted into each other, and the connection gap is an annular gap. For example, in this embodiment, the inner cutter tube 22 is inserted into the inner tube 11, and the connection gap is the gap between the inner wall of the inner tube 11 and the outer wall of the inner cutter tube 22.

[0073] In this embodiment, the sealing structure further includes a first sealing cavity 2 formed between the first connecting member 12 and the second connecting member 24. The first sealing cavity 2 communicates with the connection gap. The first sealing ring 1 is disposed in the first sealing cavity 2 and seals the connection gap.

[0074] In this embodiment, a torque transmission structure is provided between the first connecting member 12 and the second connecting member 24. When the handle body 40 is connected to the cutter assembly 20, the inner tube 11 drives the inner cutter tube 22 to rotate through the torque transmission structure. In some embodiments, the torque transmission structure can be a toothed structure, that is, end faces of teeth that mesh with each other are provided between the first connecting member 12 and the second connecting member 24 to achieve torque transmission between the inner tube 11 and the inner cutter tube 22. In other embodiments, a mating tenon and rivet are respectively provided on the first connecting member 12 and the second connecting member 24. The tenon and the rivet are non-circular, and torque is transmitted through the tenon and the rivet to achieve torque transmission between the first connecting member 12 and the second connecting member 24, thereby achieving torque transmission between the inner tube 11 and the inner cutter tube 22.

[0075] As Figure 5 shown, in this embodiment, a clamping groove 25 is provided on the first connecting member 12, and a key that cooperates with the clamping groove 25 is provided on the second connecting member 24. Torque is transmitted between the inner tube 11 and the inner cutter tube 22 through the clamping groove 25 and the key.

[0076] As Figure 5As shown, in this embodiment, the tool mounting channel 41 is coaxial with the inner tube 11. The tool assembly 20 further includes a connecting sleeve 26 fixedly sleeved outside the outer tool tube 21. When the handle body 40 is connected to the tool assembly 20, the connecting sleeve 26 is inserted into the tool mounting channel 41 in a mating manner. Of course, in the actual implementation process, the central axis of the tool mounting channel 41 may also have a certain offset relative to the central axis of the inner tube 11. However, whether there is an offset or not, when the tool assembly 20 is inserted into the tool mounting channel 41, it is ensured that the inner tube 11 is at least coaxial with the rear end of the inner tool tube 22.

[0077] In this embodiment, within the handle body 40, that is, on the inner wall of the mounting channel 41, there are radially movable detent balls 42. At positions on the connecting sleeve 26 corresponding to the detent balls 42, there are anti - detachment grooves 27 that cooperate with the detent balls 42. The cooperation between the detent balls 42 and the anti - detachment grooves 27 realizes the axial limit of the tool assembly 20.

[0078] In some embodiments, an elastic member such as a spring is provided between the detent ball 42 and the handle body 40. The elastic member abuts against the detent ball 42, provides a force acting radially towards the inside of the tool mounting channel 41 for the detent ball 42, and makes the detent ball 42 protrude from the tool mounting channel 41. When the tool assembly 20 is inserted into the tool mounting channel 41, the elastic member presses the detent ball 42 into the anti - detachment groove 27 of the tool assembly 20 to prevent the tool assembly 20 from accidentally coming out. When the tool assembly 20 is pulled out and the pulling force is sufficient, the anti - detachment groove 27 pushes the detent ball 42 to compress the elastic member, causing the detent ball 42 to disengage from the anti - detachment groove 27, and the tool assembly 20 is pulled out. In some other embodiments, the detent ball 42 can be made of an elastic material, and the tool assembly 20 compresses the detent ball 42 during the process of entering and exiting the tool mounting channel 41 to realize the axial limit of the tool assembly 20.

[0079] In this embodiment, there is a gap between the inner tool tube 22 and the outer tool tube 21, and this gap communicates with the cutting opening 23. Normal saline can be supplied to the cutting opening 23 through the gap between the inner tool tube 22 and the outer tool tube 21 to wash the cutting area during the operation.

[0080] As described above, the handle body 40 and the tool assembly 20 in this embodiment are components of the surgical power device, providing a structural basis for directly transferring the tissue cut in the inner tool tube 22 into the inner tube 11.

[0081] As Figure 4 、 Figures 8 to 16 shown, the end of the inner tube 11 can protrude from the front end of the motor housing, or can protrude from the rear end of the motor housing, or both ends of the inner tube 11 can respectively protrude from the front end and the rear end of the motor housing.

[0082] As Figure 4As shown, in this embodiment, both ends of the inner tube 11 extend out of the front end and the rear end of the motor housing respectively, forming a front extension section at the front end of the motor housing and a rear extension section at the rear end of the motor housing. The front extension section can be docked with the inner knife tube 22 of the tool assembly 20, that is, the docking position of the inner tube 11 and the inner knife tube 22 is outside the motor housing, which is beneficial to preventing the scattered waste liquid, tissues, etc. from entering the interior of the motor housing. Correspondingly, the extension section at the rear end of the motor housing can be used for docking with the output pipe 30. The docking position of the inner tube 11 and the output pipe 30 is outside the motor housing, which is also beneficial to preventing the scattered waste liquid, tissues, etc. from entering the interior of the motor housing.

[0083] In this embodiment, there is a third rotation gap 9 between the outer wall of the front extension section and the motor housing, and a second rotation gap 8 between the outer wall of the rear extension section and the motor housing, so that the inner tube 11 can rotate flexibly. In this embodiment, a sealing assembly is sleeved on the front extension section, and the sealing assembly is in sealing contact with the outer wall of the front extension section and the inner wall of the motor installation cavity 43 in the handle body 40 respectively.

[0084] In this embodiment, since the inner tube 11 is hollow, its internal cavity is the hollow channel 22a for fluid passage in the motor assembly 10, and the fluid in the inner tube 11 flows into the inner tube 11 from the front extension section. Since a sealing assembly is sleeved on the front extension section, the sealing assembly is in sealing contact with the outer wall of the front extension section and the inner wall of the motor installation cavity 43 in the handle body 40, and blocks the path from the outer end of the front extension section to the third rotation gap 9. The sealing assembly can block the scattered fluid at the extension section, prevent the waste liquid, cutting tissues, etc. from flowing into the interior of the motor housing through the third rotation gap 9, and can also block the waste liquid and cutting tissues from flowing into the interior of the motor housing along the gap between the outer wall of the motor housing and the inner wall of the motor installation cavity 43 in the handle body 40, which is beneficial to improving the reliability of the motor assembly 10.

[0085] In a possible implementation manner, with reference to Figure 4 、 Figure 9 、 Figure 10 、 Figure 18 ,the sealing assembly includes a first member 13 and a third sealing ring 5. The first member 13 is sleeved on the outer side of the front extension section and at least covers the corresponding end of the motor housing. The first member 13 is cooperatively arranged in the motor installation cavity 43 in the handle body 40. An annular third sealing cavity 6 communicating with the third rotation gap 9 is formed between the inner wall of the first member 13 and the motor housing. The third sealing ring 5 is arranged in the third sealing cavity 6 and sleeved on the front extension section. The inner side wall of the third sealing ring 5 is in sealing contact with the outer wall of the extension section of the inner tube 11, and the outer side wall of the third sealing ring 5 is in sealing contact with the inner wall of the first member 13.

[0086] With reference to Figure 10The sealing assembly further includes a fourth sealing ring 19, which is disposed on the first member 13. The fourth sealing ring 19 is used to seal the gap between the inner wall of the motor mounting cavity 43 in the handle body 40 and the first member 13. In the illustrated embodiment, the fourth sealing ring 19 is only disposed on the front extension. In actual implementation, a similar structure can also be used on the rear end.

[0087] like Figure 9 、 Figure 18 As shown, in some embodiments, the third sealing ring 5 includes a main sealing portion 5e and a secondary sealing portion 5f. The main sealing portion 5e and the secondary sealing portion 5f are integrally arranged, that is, the main sealing portion 5e and the secondary sealing portion 5f are connected as a whole, and there is no gap at the connection between the two to prevent liquid from flowing between the main sealing portion 5e and the secondary sealing portion 5f. The main sealing portion 5e is radially arranged between the secondary sealing portion 5f and the outer wall of the inner tube 11. The inner side wall of the main sealing portion 5e is in sealing contact with the outer wall of the inner tube 11 to prevent liquid from flowing between the inner side wall of the main sealing portion 5e and the outer wall of the inner tube 11. The secondary sealing portion 5f is located between the first component 13 and the motor housing to block the escape of waste liquid and tissue.

[0088] Specifically, the first member 13 compresses the secondary seal 5f between the first member 13 and the motor housing along the motor axis. This means that the secondary seal 5f is in sealing contact with both the first member 13 and the motor housing. The secondary seal seals the gap between the first member 13 and the motor housing, preventing waste fluids from passing through the gap between the first member 13 and the motor housing and the secondary seal 5f, thereby enhancing the sealing effect on the third rotating gap 9. Simultaneously, the primary seal 5e is in sealing contact with the first member 13, preventing waste fluids from passing through the primary seal 5e.

[0089] Specifically, such as Figure 18 As shown, in this embodiment, the third sealing ring 5 includes a first sealing lip 5a and a second sealing lip 5b. The first sealing lip 5a is in sealing contact with the outer wall of the inner tube 11, extending circumferentially along the third sealing ring 5 and surrounding the axis of rotation of the third sealing ring 5. The second sealing lip 5b is in sealing contact with the inner wall of the first component 13, extending circumferentially along the third sealing ring 5 and surrounding the axis of rotation of the third sealing ring 5. The first and second sealing lips 5a, 5b have low structural strength and are easily deformed, so they can fit well with other components, improving the sealing effect.

[0090] Specifically, the third sealing ring 5 further includes a connecting portion connecting the first sealing lip 5a and the second sealing lip 5b, and the first sealing lip 5a, the connecting portion, and the second sealing lip 5b enclose an annular structural groove 5c with an opening. The annular structural groove 5c can reduce the strength of the sealing ring in the radial direction, enabling the sealing ring to better fit the inner wall of the first component 13 and the outer wall of the inner tube 11 in the radial direction, and also facilitating the installation of the sealing ring.

[0091] In this embodiment, an elastic support 5d is disposed in the annular structural groove 5c. The elastic support 5d presses the first sealing lip 5a against the outer wall of the inner tube 11 in the radial direction of the sealing ring, and presses the second sealing lip 5b against the inner wall of the first component 13, respectively increasing the degree of fit of the first sealing lip 5a and the second sealing lip 5b and enhancing the sealing effect. At the same time, when the first sealing lip 5a and the second sealing lip 5b are worn, the elastic support 5d can still press the remaining parts of the first sealing lip 5a and the second sealing lip 5b against their respective corresponding components, playing a role in compensating for wear. In this embodiment, the opening direction of the annular structural groove 5c faces away from the motor housing, which is conducive to preventing the main sealing portion 5e of the sealing lip from curling when it is sleeved on the protruding section, thereby facilitating the reduction of the assembly difficulty of the sealing ring.

[0092] Specifically, the elastic support 5d is usually a metal elastic member such as a metal spring. The metal elastic member can be coated with a plastic coating such as silicone to protect the metal elastic member and provide the weather resistance and service life of the metal spring.

[0093] Such as Figure 4 、 Figure 9 、 Figure 10 As shown in

[0094] In this embodiment, the third sealing ring 5 cooperates with the first component 13 and the second component 14 to form a sealing structure for sealing the third rotating gap 9. The third sealing ring 5 does not need to be in direct contact with the motor housing, reducing the machining accuracy requirements of the motor housing and facilitating the reduction of the overall cost of the motor. Both the first component 13 and the second component 14 are positioned and connected to the motor housing, defining the relative position between the annular sealing cavity and the motor housing, and further defining the relative position between the third sealing ring 5 and the motor housing to ensure the sealing effect.

[0095] Specifically, in this embodiment, the annular accommodation space includes a main space and a secondary space that are connected and communicated. The main space is arranged in the radial direction between the secondary space and the outer wall of the inner tube 11. The sealing ring includes a main sealing portion 5e and a secondary sealing portion 5f that are integrally provided. The main sealing portion 5e is arranged in the main space, and the main sealing portion 5e is at least in sealing contact with the outer wall of the inner tube 11 to prevent external liquid from flowing into the third rotating gap 9 through the gap between the main sealing portion 5e and the inner tube 11. In this embodiment, the outer side surface of the main sealing portion 5e is also in sealing contact with the inner wall of the main space to prevent external liquid from flowing over the third sealing ring 5 from the outer side surface of the main sealing portion 5e and into the third rotating gap 9. The secondary sealing portion 5f is located in the secondary space, and the secondary sealing portion 5f is in sealing contact with the first positioning portion and the second positioning portion respectively to prevent external liquid from flowing over the outer edge of the secondary sealing portion 5f and into the third rotating gap 9.

[0096] The main space accommodates the main sealing portion 5e, and the secondary space accommodates the secondary sealing portion 5f, which respectively play a role in restricting and defining the main sealing portion 5e and the secondary sealing portion 5f to prevent the sealing ring from flipping and moving. The main sealing portion 5e and the secondary sealing portion 5f play a multi-stage sealing role to improve the sealing effect.

[0097] The end of the inner tube 11 extends out of the end structure of the motor housing, such as Figure 19 and Figure 20 shown. In some embodiments, a fifth sealing ring 50 sleeved on the inner tube 11 is provided between the end structure of the motor housing and the inner tube 11, and the fifth sealing ring 50 seals the gap between the end structure and the inner tube 11.

[0098] In some embodiments, a plurality of sealing protrusions 52 are sequentially arranged along the axial direction on the inner wall of the fifth sealing ring 50. The sealing protrusions 52 are arranged in a circle around the axis of the fifth sealing ring 50. The sealing protrusions 52 are beneficial to fit with the outer wall of the inner tube 11 to improve the sealing effect. The plurality of sealing protrusions 52 form a multi-stage sealing to increase the sealing of the gap between the end cover and the inner tube 11.

[0099] Specifically, as Figure 20As shown, in some embodiments, a skeleton 51 is provided inside the fifth sealing ring 50. The skeleton 51 is annular and is arranged around the axis of the fifth sealing ring 50 for one week. The skeleton 51 plays a supporting role for the fifth sealing ring 50 to prevent the fifth sealing ring 50 from being deformed too much and causing sealing failure.

[0100] As Figures 11 to 13 shown, in this embodiment, the output pipe 30 is fixedly arranged relative to the motor housing. The rear end of the output pipe 30 is used to connect with an external pipeline, and the front end of the output pipe 30 is inserted and sealedly communicated with the inner pipe 11. Since the rear end of the output pipe 30 is used to connect with an external pipeline and the front end of the output pipe 30 is directly and sealedly communicated with the inner pipe 11, thus, substances such as lesion tissues and flushing waste liquid in the inner pipe 11 of the motor assembly 10 can directly enter the output pipe 30 from the inner pipe 11 and then be discharged from the output pipe 30. There is no additional transfer structure between the inner pipe 11 and the output pipe 30, which is beneficial to simplifying the structure of the surgical power device and reducing costs.

[0101] Specifically, as Figure 12 shown, in this embodiment, the front end of the output pipe 30 has a docking hole 34 communicated with the inside of the output pipe 30. The rear end of the inner pipe 11, that is, the rear protruding section, is inserted into the docking hole 34. The rotation profile of the rear protruding section has a gap with the docking hole 34, so that the inner pipe 11 can rotate smoothly in the docking hole 34.

[0102] In the above description, "the rotation profile of the rear end of the inner pipe 11 has a gap with the docking hole 34" means that the inner pipe 11 does not contact the inner wall of the docking hole 34 during the rotation process, so as to avoid interference between the inner pipe 11 and the inner wall of the docking hole 34 when the inner pipe 11 rotates relative to the output pipe 30, and make the rotation between the inner pipe 11 and the output pipe 30 flexible.

[0103] As Figures 11 to 17 shown, in this embodiment, the motor assembly 10 further includes a second sealing ring 3. The second sealing ring 3 is at least partially located in the first rotation gap 7 between the outer wall of the inner pipe 11 and the inner wall of the docking hole 34. The second sealing ring 3 seals the first rotation gap 7 to play a sealing role and prevent substances such as waste liquid in the inner pipe 11 from flowing out from the first rotation gap 7 between the inner pipe 11 and the docking hole 34. In this embodiment, the second sealing ring 3 seals both the first rotation gap 7 and the second rotation gap 8 at the same time.

[0104] In this embodiment, the second sealing ring 3 is annular and sleeved on the inner pipe 11. The second sealing ring 3 has an annular first sealing part 3a. The first sealing part 3a is arranged in the first rotation gap 7. The inner surface of the first sealing part 3a is in sealing contact with the outer surface of the inner pipe 11, and the outer surface of the first sealing part 3a is in sealing contact with the inner surface of the docking hole 34, so as to seal the first rotation gap 7.

[0105] In this embodiment, a second sealing cavity 4 communicating with the first rotation gap 7 is formed between the front end face of the output pipe 30 and the motor assembly 10, and the second sealing ring 3 is partially disposed in the second sealing cavity 4. With this structure, the front end face of the output pipe 30 and the motor assembly 10 jointly position the second sealing ring 3 located in the second sealing cavity 4, playing an axial limiting role on the second sealing ring 3 disposed therein, and avoiding sealing failure caused by the movement of the second sealing ring 3.

[0106] Specifically, as Figure 16 shown, an installation hole 18 coaxial with the axis direction of the motor assembly 10 is provided on the end face of the motor assembly 10 close to one end of the output pipe 30. As Figure 15 shown, the front end of the output pipe 30 is connected in the installation hole 18, and the inner wall of the butt joint hole 34, the inner wall of the installation hole 18, and the outer wall of the inner pipe 11 jointly enclose a sealing space including the second sealing cavity 4 and the first rotation gap 7, and the second sealing ring 3 is disposed in the second sealing cavity 4. In this embodiment, a gap is formed between the end face of the output pipe 30 located inside the installation hole 18 and the bottom of the installation hole 18. As Figure 14 、 Figure 21 shown, the second sealing ring 3 has a second blocking portion 3b. The second blocking portion 3b is a circular ring-shaped sheet sleeved on the inner pipe 11. The second blocking portion 3b is located in the gap between the end face of the output pipe 30 and the bottom of the installation hole 18. One side of the second blocking portion 3b is in sealing contact with the bottom of the installation hole 18, and the other side of the second blocking portion 3b is in sealing fit with the end face of the output pipe 30. The second blocking portion 3b of the second sealing ring 3 surrounds the inner pipe 11 for one week, blocking the second sealing cavity 4, and thus forming a secondary seal for the first rotation gap 7, increasing the sealing effect of the second sealing ring 3 on the first rotation gap 7.

[0107] As Figure 16 shown, in this embodiment, the motor housing includes a housing body and a rear fixing sleeve 15 detachably sleeved on the rear end of the housing body. The installation hole 18 is formed on the rear fixing sleeve 15, and the fixing sleeve is used for the installation of the output pipe 30. In this embodiment, the second sealing ring 3 is pressed on the bottom of the installation hole 18, playing a role in blocking the first rotation gap 7 between the rear end of the motor housing and the inner pipe 11, and increasing the sealing effect on the first rotation gap 7 at the rear end of the motor housing.

[0108] In this embodiment, the inner wall of the mounting hole 18 is provided with threads, and the front end of the output pipe 30 is in threaded fit with the mounting hole 18. Of course, this embodiment does not exclude the output pipe 30 being fixed in the mounting hole 18 by welding, clamping or other means. The threaded connection facilitates the disassembly and assembly of the output pipe 30. The threads are arranged along the axial direction of the mounting hole 18. Through the threads, the size of the second sealing cavity 4 in the axial direction of the motor assembly 10 can be adjusted, and then the compression size of the part of the second sealing ring 3 between the end face of the output pipe 30 and the bottom of the mounting hole 18 can be adjusted to ensure the sealing effect of the second sealing ring 3.

[0109] In this embodiment, the handle body 40 includes a handle body 40 and a rear end cover 16 at the rear end of the handle body 40. A locking nut 17 is sleeved on the output pipe 30 through threads. The locking nut 17 presses the rear end cover 16 against the rear end of the handle body 40, and the locking nut 17 plays a role of limiting and locking the rear end cover 16.

[0110] In this embodiment, the output pipe 30 has a main channel 31 communicating with the docking hole 34. The inner diameter of the main channel 31 is greater than or equal to the inner diameter of the inner tube 11, so as to prevent tissues and waste liquid in the inner tube 11 from being blocked due to the reduction of the inner diameter of the output pipe 30 after entering the output pipe 30 from the inner tube 11.

[0111] In this embodiment, the outer diameter of the inner tube 11 is greater than the inner diameter of the main channel 31. In this way, the size of the inner tube 11 is relatively large, which is beneficial to making the inner tube 11 have better mechanical properties and improving the service life of the inner tube 11. Of course, this embodiment does not exclude the case where the outer diameter of the inner tube 11 is less than or equal to the inner diameter of the main channel 31.

[0112] As Figure 13 shown, in this embodiment, the docking hole 34 at least includes a first hole section 32 and a second hole section 33. The first hole section 32, the second hole section 33 and the main channel 31 are communicated in sequence from front to back. The inner diameter of the first hole section 32 is greater than that of the second hole section 33, and the inner diameter of the second hole section 33 is greater than that of the first hole section 32. The rear end of the inner tube 11 extends into the second hole section 33, and the second sealing ring 3 is at least partially arranged between the outer wall of the inner tube 11 and the inner wall of the first hole section 32. This structure enables the inner wall of the first hole section 32 and the outer wall of the inner tube 11 to have a sufficiently large gap in the radial direction, and the installation space of the second sealing ring 3 is larger, and the selection range is wider. Therefore, the sealing performance can be improved by selecting a suitable second sealing ring 3.

[0113] In some embodiments, only the front end section of the output tube 30 is coaxially arranged with the inner tube 11. The section of the output tube 30 forming the main channel 31 is offset from the inner tube 11. In this embodiment, the coaxial arrangement of the output tube 30 and the inner tube 11 ensures a sufficient communication area between the inner tube 11 and the output tube 30. After the discharge from the inner tube 11 enters the output tube 30 in each radial direction, the radial dimension changes are consistent and the flow rate is consistent or similar, which helps maintain the unobstructed flow of the output tube 30.

[0114] In this embodiment, the rear end of the output tube 30 is provided with an anti-detachment structure for connecting to a hose. In some embodiments, the anti-detachment structure is a clamp. In this embodiment, the anti-detachment structure is a barb. After an external pipe, such as a hose, is connected to the rear end of the output tube 30, the barb can reduce the chance of accidental detachment of the external pipe.

[0115] This embodiment also provides a surgical power device, including the above planing / grinding handle and a tool assembly 20 adapted to the planing / grinding handle. This embodiment also provides a tool assembly 20, which is adapted to the planing / grinding handle in this embodiment.

[0116] In summary, the planing / grinding surgical handle of this embodiment has an inner tube disposed within the rotor, the inner tube being coaxially disposed with the rotor and rotating therewith. The rear end of the inner blade tube is coaxial with the inner tube, the front end of the inner tube is transmission-connected and sealed to the rear end of the inner blade tube, and the rear end of the inner tube is directly and sealedly connected to the front end of the output tube. Therefore, the inner tube of the planing / grinding surgical handle of this utility model can directly drive the inner blade tube to rotate. Compared to the prior art technical solution in which the rotation axis of the motor assembly is offset from the extension direction of the inner blade tube, no additional transmission mechanism such as a gear set is required, resulting in a simple structure and a simplified overall structure of the planing / grinding surgical handle. Furthermore, waste liquid, cut tissue, etc. in the inner blade tube of this utility model can be directly transferred via the sequentially disposed inner tube and output tube. Compared to the prior art technical solution in which the output channel and the inner blade tube are offset, no additional transition structure is required between the inner blade tube and the output channel, resulting in a simple structure and a simplified overall structure of the planing / grinding surgical handle.

[0117] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A planing / grinding handle adapted to a tool assembly, the tool assembly comprising an outer tool tube and an inner tool tube rotatably disposed within the outer tool tube, characterized in that, The planing / grinding handle includes: A handle body having a motor mounting cavity and a tool mounting channel communicating with each other; A motor assembly disposed in the motor mounting cavity, the motor assembly including a motor housing and an inner tube rotatably disposed within the motor housing; An output tube fixedly disposed relative to the motor housing, the rear end of the output tube extending out of the rear end of the handle body, the output tube being adapted to be connected to an external pipeline, and the front end of the output tube being plugged and sealingly communicated with the rear end of the inner tube; Wherein, when the tool assembly is mounted in the tool mounting channel, the rear end of the inner cutter tube is coaxial with and drivingly connected to the inner tube, and the inner tube and the inner cutter tube are communicated by abutting or plugging the front end of the inner tube against the rear end of the inner cutter tube.

2. The planing / grinding handle according to claim 1, characterized in that: The inner tube has a hollow channel extending along the axis of the inner tube. When the tool assembly is mounted in the tool mounting channel, the rear end of the inner cutter tube is plugged into the hollow channel at the front end of the inner tube; The inner diameter of the rear end of the inner cutter tube is equal at each cross-section, the inner diameter of the front end of the inner tube is equal at each cross-section, and the inner diameter of the inner cutter tube is smaller than the inner diameter of the inner tube.

3. The planing / grinding handle according to claim 2, wherein: A first connecting member is provided at the rear end of the inner cutter tube, and a second connecting member is provided at the front end of the inner tube; When the tool assembly is mounted in the tool mounting channel, a connection gap is formed between the inner tube and the inner cutter tube. The connection gap is an annular gap, and a first sealing cavity communicating with the connection gap is formed between the first connecting member and the second connecting member. A first sealing ring for blocking the connection gap is disposed in the first sealing cavity; A torque transmission structure is provided between the first connecting member and the second connecting member, and the inner tube drives the inner cutter tube to rotate through the torque transmission structure.

4. The planing / grinding handle according to claim 1, characterized in that, The front end of the output tube has a docking hole communicating with the inside of the output tube. The rear end of the inner tube is inserted into the docking hole, and a first rotation gap is provided between the rotation profile of the rear end of the inner tube and the inner wall of the docking hole.

5. The planing / grinding handle according to claim 4, characterized in that, The end of the inner tube extends out of the rear end of the motor housing and forms a rear extension section. A second rotation gap is provided between the outer wall of the rear extension section and the motor housing. A second sealing ring for simultaneously blocking the first rotation gap and the second rotation gap is disposed on the rear extension section.

6. The planing / grinding handle according to claim 5, wherein, An installation hole coaxial with the axis direction of the motor assembly is provided at one end of the motor housing close to the output tube, and the front end of the output tube is connected in the installation hole; Wherein, the inner wall of the installation hole is provided with threads, and the front end of the output tube is in threaded engagement with the installation hole; and / or, a sealing space including a second sealing cavity and the first rotation gap is jointly formed by the inner wall of the docking hole, the inner wall of the installation hole, and the outer wall of the inner tube, and the second sealing ring is disposed in the second sealing cavity.

7. The planing / grinding handle according to claim 6, characterized in that: The motor housing includes a housing body and a rear fixing sleeve detachably sleeved on the rear end of the housing body, and the mounting hole is formed on the rear fixing sleeve.

8. The planing / grinding handle according to claim 4, characterized in that: The handle body includes a handle main body and a rear end cover at the rear end of the handle main body. A locking nut is sleeved on the output pipe through a thread, and the locking nut presses the rear end cover against the rear end of the handle main body.

9. The planing / grinding handle according to claim 4, characterized in that: The output pipe has a main channel communicating with the docking hole, and the inner diameter of the main channel is greater than or equal to the inner diameter of the inner pipe; and / or, the outer diameter of the inner pipe is greater than the inner diameter of the main channel.

10. The planing / grinding handle according to claim 1, characterized in that, The end of the inner pipe extends out of the front end of the motor housing to form a front extension section. There is a third rotational clearance between the outer wall of the front extension section and the motor housing. A sealing assembly is sleeved on the front extension section, and the sealing assembly is in sealing contact with the outer wall of the front extension section and the inner wall of the motor mounting cavity respectively.

11. The planing / grinding handle according to claim 10, characterized in that, The sealing assembly includes: A first member, which is sleeved outside the extension section and at least covers the corresponding end of the motor housing. The first member is arranged in the motor mounting cavity, and a third sealing cavity communicating with the third rotational clearance is formed between the inner wall of the first member and the motor housing. A third sealing ring, which is arranged in the third sealing cavity. The inner side wall of the third sealing ring is in sealing contact with the outer wall of the front extension section, and the outer side wall of the third sealing ring is in sealing contact with the inner wall of the first member. A fourth sealing ring, which is arranged on the first member and is in sealing contact with the inner wall of the motor mounting cavity to seal the gap between the inner wall of the motor mounting cavity and the first member.

12. A surgical power device, characterized in that, It includes a planing / grinding handle according to any one of claims 1-10 and a tool assembly adapted to the planing / grinding handle.

13. A cutting tool assembly, characterized in that, The tool assembly is adapted to the planing / grinding handle according to any one of claims 1-11.

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