Planing / grinding handle, cutter assembly, and surgical power apparatus

Abstract

The present application provides a planing / grinding handle, a cutter assembly (20), and a surgical power apparatus, and relates to the technical field of surgical devices. The planing / grinding handle comprises a motor assembly (10), a handle body (40), and an output tube (30). The handle body (40) is provided with an internal cavity. The motor assembly (10) is arranged in the internal cavity, and the motor assembly (10) comprises a motor housing and an inner tube (11) rotatably arranged in the motor housing. The output tube (30) is fixedly arranged relative to the motor housing. The rear end of the output tube (30) extends out of the rear end of the handle body (40). The output tube (30) is configured for connecting to an external tube. The front end of the output tube (40) is inserted into and in sealed communication with the rear end of the inner tube (11). The planing / grinding handle is adapted to the cutter assembly (20). The cutter assembly (20) comprises an outer cutter tube (21) and an inner cutter tube (22). The outer cutter tube (21) is connected to the handle body (40). The inner cutter tube (22) rotatably penetrates through the outer cutter tube (21). The rear end of the inner cutter tube (22) is coaxial with and in transmission connection with the inner tube (11).

Description

Planing / grinding handles, tool assemblies, surgical power units

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on September 2, 2024, with application number 2024112215224, entitled "Planking / Grinding Handle, Tool Assembly, Surgical Power Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of surgical equipment technology, and in particular to a planing / grinding handle, a cutting tool assembly, and a surgical power device. Background Technology

[0004] Planing tools typically consist of an outer tube and an inner tube housed within it. The outer tube has a cutting opening at its front end, allowing a cutting window at the front end of the inner tube to be exposed. When the inner tube rotates, the cutting edge formed by the cutting window can cut the tissue to complete the surgery. Some grinding tools have an inner tube connected to a grinding head, with the front ends of both the grinding head and the inner tube exposed at the front end of the outer tube. The front end of the inner tube has a tissue inlet for tissue to enter. During surgery, the tail end of the inner tube can be connected to an output channel, which in turn connects to a negative pressure device to aspirate the cut tissue, facilitating subsequent testing such as pathological classification.

[0005] In some existing planing / grinding surgical handpieces, the output channel and the inner blade tube are coaxially arranged, and the rotation axis of the drive motor is offset from the extension direction of the inner blade tube. The drive motor needs to drive the inner blade tube through an additional transmission mechanism such as a gear set, which makes the entire surgical power device complex. Furthermore, in existing planing / grinding surgical handpieces, many adapter parts are configured in order to drain the tissue and waste fluid in the output channel from the device, which makes the entire device not only complex in structure but also prone to clogging. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a planing / grinding handle, a cutting tool assembly, and a surgical power device.

[0007] To achieve the above and other related objectives, this application provides a planing / grinding handle adapted to a tool assembly, the tool assembly including an outer tool tube and an inner tool tube rotatably disposed within the outer tool tube, and the planing / grinding handle including:

[0008] The handle has a connected motor mounting cavity and a tool mounting channel;

[0009] A motor assembly is disposed in the motor mounting cavity, the motor assembly including a motor housing and an inner tube rotatably disposed within the motor housing;

[0010] An output tube is fixedly disposed relative to the motor housing. The rear end of the output tube extends out of the rear end of the handle. The output tube is used to connect to an external pipeline. The front end of the output tube is inserted into and sealed to the rear end of the inner tube.

[0011] When the tool assembly is installed in the tool mounting channel, the rear end of the inner tool tube is coaxial with and driven by the inner tube, and the inner tube and the inner tool tube are connected by the front end of the inner tube abutting or inserting with the rear end of the inner tool tube.

[0012] Optionally, the inner tube has a hollow channel extending along the axial direction of the inner tube, and when the tool assembly is installed in the tool mounting channel, the rear end of the inner tool tube is inserted into the hollow channel at the front end of the inner tube.

[0013] The inner diameter of the rear end of the inner knife tube is equal at each cross-section, and the inner diameter of the front end of the inner tube is equal at each cross-section. Furthermore, the inner diameter of the inner knife tube is smaller than the inner diameter of the inner tube.

[0014] Optionally, a first connector is provided at the rear end of the inner tube, and a second connector is provided at the front end of the inner tube;

[0015] When the tool assembly is installed in the tool mounting 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 is formed between the first connector and the second connector, which communicates with the connection gap. A first sealing ring is provided in the first sealing cavity to seal the connection gap.

[0016] Optionally, a torque transmission structure is provided between the first connector and the second connector, and the inner tube drives the inner knife tube to rotate through the torque transmission structure.

[0017] Optionally, the front end of the output tube has a docking hole communicating with the interior of the output tube, the rear end of the inner tube is inserted into the docking hole, and there is a first rotational clearance between the rotational profile of the rear end of the inner tube and the inner wall of the docking hole.

[0018] Optionally, the end of the inner tube extends through the rear end of the motor housing and forms a rear extension section. The outer wall of the rear extension section has a second rotational gap with the motor housing. A second sealing ring is provided on the rear extension section to simultaneously seal the first rotational gap and the second rotational gap.

[0019] Optionally, a mounting hole coaxial with the axis of the drive motor is provided on the motor housing near one end of the output tube, and the front end of the output tube is connected to the mounting hole;

[0020] The inner wall of the mounting hole is threaded, and the front end of the output tube is threaded into the mounting hole; and / or, the inner wall of the mating hole, the inner wall of the mounting hole, and the outer wall of the inner tube together form a sealing space including a second sealing cavity and the first rotation gap, and the second sealing ring is disposed in the second sealing cavity.

[0021] Optionally, the motor housing includes a housing body and a detachable rear fixing sleeve fitted onto the rear end of the housing body, wherein the mounting hole is formed on the rear fixing sleeve.

[0022] Optionally, the handle includes a handle body and a rear end cap at the rear end of the handle body, and a locking sleeve is threaded onto the output tube, the locking sleeve pressing the rear end cap against the rear end of the handle body.

[0023] Optionally, the output tube has a main channel communicating with the docking hole, the inner diameter of the main channel being greater than or equal to the inner diameter of the inner tube; and / or, the outer diameter of the inner tube being greater than the inner diameter of the main channel.

[0024] Optionally, the end of the inner tube extends through the front extension section of the front end of the motor housing, and there is a third rotational clearance between the outer wall of the front extension section and the motor housing. A sealing component is sleeved on the front extension section, and the sealing component makes sealing contact with the outer wall of the front extension section and the inner wall of the motor mounting cavity, respectively.

[0025] Optionally, the sealing assembly includes:

[0026] The first component is sleeved outside the protruding section and at least covers the corresponding end of the motor housing. The first component is disposed 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 component and the motor housing.

[0027] A third sealing ring is disposed in the third sealing cavity. The inner wall of the third sealing ring is in sealing contact with the outer wall of the front extension section, and the outer wall of the third sealing ring is in sealing contact with the inner wall of the first component.

[0028] A fourth sealing ring is disposed on the first component and makes 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 component.

[0029] Optionally, the third sealing ring includes a main sealing part and a secondary sealing part, the main sealing part and the secondary sealing part are integrally formed, the main sealing part is radially disposed between the secondary sealing part and the outer wall of the inner tube, and the secondary sealing part is located between the first component and the motor housing.

[0030] Optionally, the main sealing part includes a first sealing lip and a second sealing lip. The first sealing lip is in sealing contact with the outer wall of the inner tube and extends circumferentially along the third sealing ring and is arranged around the rotation axis of the third sealing ring. The second sealing lip is in sealing contact with the inner wall of the first component and extends circumferentially along the third sealing ring and is arranged around the rotation axis of the third sealing ring.

[0031] Optionally, the third sealing ring further includes a connecting portion that connects the first sealing lip and the second sealing lip, and the first sealing lip, the connecting portion, and the second sealing lip form an annular groove with an opening.

[0032] Optionally, an elastic support is provided in the annular groove, which presses the first sealing lip against the outer wall of the inner tube in the radial direction of the third sealing ring, and presses the second sealing lip against the inner wall of the first component.

[0033] Optionally, the end of the inner tube extends through the end structure of the motor housing, and a fifth sealing ring is provided between the end structure of the motor housing and the inner tube, which is sleeved on the inner tube to seal the gap between the end structure and the inner tube.

[0034] Optionally, a plurality of sealing protrusions are sequentially arranged along the axial direction on the inner wall of the fifth sealing ring, the sealing protrusions being arranged around the axis of the fifth sealing ring, and the sealing protrusions fitting against the outer wall of the inner tube; and / or,

[0035] The fifth sealing ring is provided with a skeleton, which is annular and surrounds the axis of the fifth sealing ring.

[0036] This application also provides a surgical power device, including a planing / grinding handle as described in any of the preceding claims and a tool assembly adapted to the planing / grinding handle.

[0037] This application also provides a tool assembly adapted to a planing / grinding handle as described in any of the preceding claims. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0039] Figure 1 is a cross-sectional structural diagram of the surgical power device in an embodiment of this application;

[0040] Figure 2 is a schematic cross-sectional view of the handle in an embodiment of this application;

[0041] Figure 3 is a schematic cross-sectional view of the handle in an embodiment of this application;

[0042] Figure 4 is a cross-sectional view of the motor assembly in an embodiment of this application;

[0043] Figure 5 is a cross-sectional structural diagram of the tool assembly in an embodiment of this application;

[0044] Figure 6 is a structural schematic diagram of the connection between the first connector and the second connector in an embodiment of this application;

[0045] Figure 7 is a schematic diagram of the structure of the first sealing cavity in an embodiment of this application;

[0046] Figure 8 is a structural schematic diagram of the first connector in an embodiment of this application;

[0047] Figure 9 is a schematic diagram of the motor assembly at the third sealing ring in an embodiment of this application;

[0048] Figure 10 is a schematic diagram of the structure of the first sealing cavity in an embodiment of this application;

[0049] Figure 11 is a schematic diagram of the structure of the motor assembly and output tube in the embodiment of this application;

[0050] Figure 12 is a schematic diagram of the output tube in an embodiment of this application;

[0051] Figure 13 is a schematic diagram of the structure of the docking hole in an embodiment of this application;

[0052] Figure 14 is a schematic diagram of the structure of the second sealing ring in an embodiment of this application;

[0053] Figure 15 is a schematic diagram of the structure of the second sealing cavity in an embodiment of this application;

[0054] Figure 16 is a schematic diagram of the structure of the rear fixing sleeve in an embodiment of this application;

[0055] Figure 17 is a partially enlarged structural diagram of the motor assembly at the second sealing ring in an embodiment of this application;

[0056] Figure 18 is a partially enlarged structural schematic diagram of the third sealing ring in an embodiment of this application;

[0057] Figure 19 is a schematic diagram of the structure of the fifth sealing ring in the embodiment of this application;

[0058] Figure 20 is a partially enlarged structural diagram of the fifth sealing ring in an embodiment of this application;

[0059] Figure 21 is a partially enlarged structural schematic diagram of the second sealing ring in an embodiment of this application.

[0060] Explanation of reference numerals in the attached drawings: 1. First sealing ring; 2. First sealing cavity; 3. Second sealing ring; 3a. First sealing part; 3b. Second sealing part; 4. Second sealing cavity; 5. Third sealing ring; 5a. First sealing lip; 5b. Second sealing lip; 5c. Annular structure groove; 5d. Elastic support; 5e. Main sealing part; 5f. Secondary sealing part; 6. Third sealing cavity; 7. First rotation clearance; 8. Second rotation clearance; 9. Third rotation clearance; 10. Motor assembly; 11. Inner tube; 12. Second connector; 13. First component; 14. Second component. 15. Rear fixing sleeve, 16. Rear end cover, 17. Locking screw sleeve, 18. Mounting hole, 19. Fourth sealing ring, 20. Tool assembly, 21. Outer tool tube, 22. Inner tool tube, 22. Hollow channel, 22a. Cutting opening, 23. First connecting piece, 24. Slot, 25. Connecting sleeve, 26. Anti-disengagement slot, 27. Output tube, 30. Main channel, 31. First hole section, 32. Second hole section, 33. Butt hole, 34. Handle body, 40. Mounting channel, 41. Locking ball, 42. Motor mounting cavity, 43. Fifth sealing ring, 50. Frame, 51. Sealing protrusion, 52. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0063] It should be noted that the illustrations provided in one embodiment are merely schematic representations of the basic concept of this application. Therefore, the drawings only show components relevant to this application and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, and sizes shown in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this application, should still fall within the scope of the technical content disclosed in this application. It should also be noted that in the description of this specification, "rear" refers to the position of the instrument or component closer to the operator, and "front" refers to the position of the instrument or component farther from the operator. The terms "before" and "after" are merely for clarity of description and are not intended to limit the scope of this application. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered as part of the scope of this application.

[0064] Please refer to Figures 1 to 21. One embodiment of this application provides a planing / grinding handle adapted to a tool assembly 20. The planing / grinding handle includes a motor assembly 10, a handle body 40, and an output tube 30. The handle body 40 has a tool mounting channel 41 and a motor mounting cavity 43 for mounting the motor assembly 10. The tool mounting channel 41 and the motor mounting cavity 43 are connected.

[0065] Referring to Figure 1, 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 a stator (not shown), which cooperate with the rotor to enable rotation. In one embodiment, the inner tube 11 is disposed within the rotor, coaxially aligned with the rotor and rotating together with it. An output pipe 30 is fixedly disposed relative to the motor housing, with its front end directly and sealed to the rear end of the inner tube 11, and its rear end used for connection to an external pipeline.

[0066] In one 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 40.

[0067] In one embodiment, the tool assembly 20 includes an outer tool tube 21 and an inner tool tube 22. The outer tool tube 21 is connected to the motor housing, and the inner tool tube 22 is rotatably inserted into the outer tool tube 21. When the tool assembly 20 is installed in the tool mounting channel 41 and the shank 40 is connected to the tool assembly 20, the rear end of the inner tool tube 22 is coaxial with the inner tube 11, and the front end of the inner tube 11 is connected to the rear end of the inner tool tube 22 in a driving and sealed manner.

[0068] Therefore, in one embodiment, the inner tube 11 can directly drive the inner blade tube 22 to rotate without the need for additional transmission mechanisms such as gear sets, resulting in a simple structure and simplifying the overall structure of the surgical power device. Simultaneously, waste fluid and cut tissue in the inner blade tube 22 of the surgical power device can be directly transferred via the sequentially arranged inner tube 11 and output tube 30, without any additional connecting structure between the inner blade tube 22 and the output channel, further simplifying the overall structure of the surgical power device.

[0069] Referring to Figures 2 and 3, in one embodiment, the tool mounting channel 41 communicates with the motor mounting cavity 43. The tool mounting channel 41 is located in front of the inner tube 11. One end of the tool mounting channel 41 has an opening for the tool assembly 20 to enter and exit, and the other end of the tool mounting channel 41 leads 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, the tool assembly 20, and the output tube 30, provides protection, and facilitates gripping by the operator.

[0070] The tool assembly is detachably inserted into the tool mounting channel 41 of the shank 40 for mounting within the shank 40. The motor assembly 10 in the shank 40 drives the inner tool tube 22 of the tool assembly 20 to rotate to achieve cutting operations. When the tool assembly is inserted into the tool mounting channel 41 and the motor assembly 10 is connected to the tool assembly 20, the outer tool tube 21 is connected to the shank 40 via the outer tool holder, and the inner tube 11 is at least coaxial with and drivenly connected to the rear end of the inner tool tube 22. The inner tube 11 and the inner tool tube 22 are connected by the front end of the inner tube 11 abutting or inserting with the rear end of the inner tool tube 22.

[0071] It is worth mentioning that the aforementioned "tool assembly 20" can be a planer. The outer tube 21 of the planer is provided with a cutting opening 23 at its front end, which allows the cutting window at the front end of the inner tube 22 to be exposed. When the inner tube 22 rotates, the cutting edge formed by the edge of the cutting window of the inner tube 22 can cut the tissue. The tissue enters the inner tube 22 through the cutting window and is extracted through the inner tube 11. The aforementioned "tool assembly 20" can also be a drill bit (not shown in the figure) with a tissue channel. The inner tube 22 of the drill bit is provided with a cutting head at its front end. The side wall of the inner tube 22 is provided with a tissue inlet. The cutting head is at least partially exposed at the front end of the outer tube 21. When the inner tube 22 rotates, the cutting head grinds the tissue and performs tissue cutting. The tissue enters the inner tube 22 through the tissue inlet and is extracted through the inner tube 11.

[0072] It should be noted that the above-mentioned "connection between the shank 40 and the outer tool tube 21" can be in various ways. For example, in some embodiments, the outer tool tube 21 and the shank 40 are relatively fixedly connected. In other embodiments, the shank 40 is provided with an adjustment structure for adjusting the rotation direction of the outer tool tube 21, so that the outer tool tube 21 rotates relative to the inner tool tube 22, thereby adjusting the cutting position.

[0073] It should be noted that there are at least two possible ways to achieve the above-mentioned "inner tube 11 is at least coaxial with the rear end of the inner blade tube 22": For example, in some embodiments, the central axis of the tool assembly 20 is divided into front and rear segments, and the central axis between the front and rear segments forms a bending angle. The inner blade tube 22 can be rotated within the bent outer blade tube 21 by using a structure such as multi-layer flexible tubing. In this case, the rear end of the inner tube 11 and the inner blade tube 22 are coaxial, but the front end of the inner tube 11 and the inner blade tube 22 are not coaxial; in one embodiment, the tool assembly 20 adapted to the shank 40 is straight, and the inner blade tube 22 and the outer blade tube 21 are coaxially arranged, which makes the entire inner blade tube 22 and the inner tube 11 coaxial.

[0074] In one embodiment, since the inner blade tube 22 and the inner tube 11 are directly connected without any additional connecting structure, it is beneficial to simplify the overall structure of the surgical power device.

[0075] As shown in Figures 1 to 8, in one embodiment, the inner tube 11 has a hollow channel 22a extending axially along the inner tube 11. When the tool assembly 20 is installed in the tool mounting channel 41 and the shank 40 is connected to the tool assembly 20, the rear end of the inner blade tube 22 is inserted into the hollow channel 22a, so that the inner channel of the inner blade tube 22 is directly connected to the hollow channel 22a in the inner tube 11. In this way, the inner diameter of the inner tube 11 is larger, and under negative pressure, the waste fluid and tissue fluid in the inner blade tube 22 can directly enter the inner tube 11 and be discharged, which helps to reduce the possibility of blockage when the tissue, waste fluid and other substances in the inner blade tube 22 pass through the connection between the inner blade tube 22 and the inner tube 11.

[0076] In one embodiment, the inner diameter of the inner blade tube 22 is equal at all cross-sections, and the inner diameter of the inner tube 11 is equal at all cross-sections. Furthermore, the inner diameter of the inner blade tube 22 is smaller than that of the inner tube 11. That is, the radial dimension of the hollow channel within the inner blade tube 22 is smaller than the radial dimension of the hollow channel 22a within the inner tube 11. Thus, along the suction direction from front to back, the suction channel formed by the inner blade tube 22 and the inner tube 11 presents an overall shape that is smaller at the front and larger at the back, which helps to avoid blockage. Of course, it is also possible for the inner diameter of the inner blade tube 22 to gradually increase from front to back, and / or for the inner diameter of the inner tube 11 to gradually increase from front to back; both of these situations help to avoid blockage.

[0077] In one embodiment, when the tool assembly 20 is installed in the tool mounting 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 blade tube 22, and a sealing structure is formed between the inner tube 11 and the inner blade tube 22 to form a sealed connection gap.

[0078] Specifically, as shown in Figures 6 to 8, in one embodiment, a first connector 24 is provided on the rear end of the inner tube 22, and a second connector 12 is provided on the front end of the inner tube 11. A connection gap is formed between the first connector 24 and the second connector 12. The sealing structure includes a first sealing ring 1 disposed between the first connector 24 and the second connector 12, and the first sealing ring 1 seals the connection gap.

[0079] In the existing tool assembly 20, the rear end of the first connector 24 is further back than the rear end of the inner blade tube 22. The inner cavity of the first connector 24 serves as part of the suction channel. To ensure that the rear end of the inner blade tube 22 can be inserted into the hollow channel 22a when the shank 40 is connected to the tool assembly 20, thereby reducing blockage of tissue, waste fluid, and other substances in the inner blade tube 22 at the connection point between the inner blade tube 22 and the inner tube 11, an improvement is made to the tool assembly 20 in one embodiment. The tool assembly 20 adopts the following structure:

[0080] In one embodiment, the inner cutter tube 22 receives rotational power from the motor assembly 10 via a first connector 24. The first connector 24 rotates together with the inner cutter tube 22, and the inner cutter tube 22 has a connecting section that extends rearward through the first connector 24. In this type of cutter assembly 20, because the connecting section extends out of the first connector 24, 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.

[0081] In some embodiments, when the shank 40 is connected to the tool assembly 20, the end face of the inner blade tube 22 abuts (bears) with the end face of the inner tube 11, and the connection gap includes the gap between the end face of the inner blade tube 22 and the end face of the inner tube 11. In other embodiments, when the shank 40 is connected to the tool assembly 20, the inner tube 11 and the inner blade tube 22 are inserted into each other, and the connection gap is an annular gap. For example, in one embodiment, the inner blade 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 blade tube 22.

[0082] In one embodiment, the sealing structure further includes a first sealing cavity 2 formed between the first connector 24 and the second connector 12, the first sealing cavity 2 communicating with the connection gap, and the first sealing ring 1 disposed in the first sealing cavity 2 and sealing the connection gap.

[0083] In one embodiment, a torque transmission structure is provided between the first connecting member 24 and the second connecting member 12. When the shank 40 is connected to the tool assembly 20, the inner tube 11 drives the inner tool tube 22 to rotate through the torque transmission structure. In some embodiments, the torque transmission structure can be a toothed structure, that is, the first connecting member 24 and the second connecting member 12 are provided with meshing end face teeth to realize the torque transmission between the inner tube 11 and the inner tool tube 22. In other embodiments, the first connecting member 24 and the second connecting member 12 are respectively provided with mutually cooperating tenons and rivets. The tenons and rivets are non-circular, and the torque is transmitted through the tenons and rivets to realize the torque transmission between the first connecting member 24 and the second connecting member 12, thereby realizing the torque transmission between the inner tube 11 and the inner tool tube 22.

[0084] As shown in Figure 5, in one embodiment, the first connector 24 is provided with a slot 25, and the second connector 12 is provided with a key that cooperates with the slot 25. The inner tube 11 and the inner knife tube 22 transmit torque through the slot 25 and the key.

[0085] As shown in Figure 5, in one embodiment, the tool mounting channel 41 is coaxial with the inner tube 11. The tool assembly 20 also includes a connecting sleeve 26 fixedly sleeved on the outer tool tube 21. When the shank 40 is connected to the tool assembly 20, the connecting sleeve 26 is inserted into the tool mounting channel 41. Of course, in actual implementation, the central axis of the tool mounting channel 41 may be offset relative to the central axis of the inner tube 11 by a certain amount. However, regardless of the offset, when the tool assembly 20 is inserted into the tool mounting channel 41, it satisfies that the inner tube 11 is at least coaxial with the rear end of the inner tool tube 22.

[0086] In one embodiment, a radially movable retaining bead 42 is provided inside the handle 40, that is, on the inner wall of the mounting channel 41. A non-disengagement groove 27 is provided on the connecting sleeve 26 at the position corresponding to the retaining bead 42. The retaining bead 42 cooperates with the non-disengagement groove 27 to limit the axial movement of the tool assembly 20.

[0087] In some embodiments, an elastic element, such as a spring, is provided between the retaining bead 42 and the shank 40. The elastic element abuts against the retaining bead 42, providing a radial force to the retaining bead 42 toward the tool mounting channel 41, causing the retaining bead 42 to protrude from the tool mounting channel 41. When the tool assembly 20 is inserted into the tool mounting channel 41, the elastic element presses the retaining bead 42 into the anti-disengagement groove 27 of the tool assembly 20, preventing the tool assembly 20 from accidentally disengaging. When the tool assembly 20 is pulled out and the pulling force is sufficient, the anti-disengagement groove 27 pushes the retaining bead 42 to compress the elastic element, causing the retaining bead 42 to disengage from the anti-disengagement groove 27, and the tool assembly 20 is pulled out. In other embodiments, the retaining bead 42 may be made of an elastic material, and the tool assembly 20 compresses the retaining bead 42 during the process of entering and exiting the tool mounting channel 41, thereby limiting the axial movement of the tool assembly 20.

[0088] In one embodiment, a gap is left between the inner blade tube 22 and the outer blade tube 21, which communicates with the cutting opening 23. Physiological saline can be supplied to the cutting opening 23 through the gap between the inner blade tube 22 and the outer blade tube 21 so as to rinse the cutting area during the operation.

[0089] As shown in the above embodiment, the handle 40 and the blade assembly 20 are components of the surgical power device, providing a structural basis for directly transferring the tissue cut in the inner blade tube 22 to the inner tube 11.

[0090] As shown in Figures 4 and 8 to 16, the end of the inner tube 11 can extend through the front end of the motor housing, or through the rear end of the motor housing, or the two ends of the inner tube 11 can extend through the front end and the rear end of the motor housing respectively.

[0091] As shown in Figure 4, in one embodiment, the two ends of the inner tube 11 extend out from the front and rear ends of the motor housing, respectively, forming a front extension section at the front end and a rear extension section at the rear end. The front extension section can connect with the inner blade tube 22 of the tool assembly 20. That is, the connection position between the inner tube 11 and the inner blade tube 22 is outside the motor housing, which helps to prevent spilled waste liquid, tissue, etc. from entering the interior of the motor housing. Correspondingly, the extension section at the rear end of the motor housing can be used to connect with the output pipe 30. The connection position between the inner tube 11 and the output pipe 30 is outside the motor housing, which also helps to prevent spilled waste liquid, tissue, etc. from entering the interior of the motor housing.

[0092] In one embodiment, referring to Figure 9, a third rotational clearance 9 is provided between the outer wall of the front extension section and the motor housing; referring to Figure 14, a second rotational clearance 8 is provided between the outer wall of the rear extension section and the motor housing, so that the inner tube 11 can rotate flexibly. In one embodiment, a sealing assembly is fitted on the front extension section, and the sealing assembly makes sealing contact with the outer wall of the front extension section and the inner wall of the motor mounting cavity 43 in the handle 40, respectively.

[0093] In one embodiment, since the inner tube 11 is hollow, its internal cavity is the hollow channel 22a in the motor assembly 10 for fluid passage. Fluid flows into the inner tube 11 from the front extension section. Since a sealing component is sleeved on the front extension section, the sealing component is in sealed contact with the outer wall of the front extension section and the inner wall of the motor mounting cavity 43 in the handle 40, and blocks the path from the outer end of the front extension section to the third rotation gap 9. The sealing component can block the fluid escaping at the extension section, preventing waste liquid, cutting materials, etc. from flowing into the motor housing through the third rotation gap 9. It can also prevent waste liquid and cutting materials from flowing into the motor housing along the gap between the outer wall of the motor housing and the inner wall of the motor mounting cavity 43 in the handle 40, which is beneficial to improving the reliability of the motor assembly 10.

[0094] In one possible implementation, referring to Figures 4, 9, 10, and 18, the sealing assembly includes a first component 13 and a third sealing ring 5. The first component 13 is fitted over the front extension section and at least covers the corresponding end of the motor housing. The first component 13 is fitted into the motor mounting cavity 43 in the handle 40. The inner wall of the first component 13 and the motor housing form an annular third sealing cavity 6 that communicates with the third rotational clearance 9. The third sealing ring 5 is disposed in the third sealing cavity 6 and fitted over the front extension section. The inner 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 wall of the third sealing ring 5 is in sealing contact with the inner wall of the first component 13.

[0095] Referring to Figure 10, the sealing assembly also includes a fourth sealing ring 19, which is disposed on the first component 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 component 13. In the illustrated embodiment, the fourth sealing ring 19 is only provided on the protruding section at the front end. In actual implementation, a similar structure can also be used at the rear end.

[0096] As shown in Figures 9 and 18, in some embodiments, the third sealing ring 5 includes a main sealing part 5e and a secondary sealing part 5f. The main sealing part 5e and the secondary sealing part 5f are integrally formed, meaning they are connected as one unit without gaps to prevent liquid from flowing between them. The main sealing part 5e is radially disposed between the secondary sealing part 5f and the outer wall of the inner tube 11. The inner wall of the main sealing part 5e is in sealing contact with the outer wall of the inner tube 11, preventing liquid from flowing between them. The secondary sealing part 5f is located between the first component 13 and the motor housing, acting as a barrier against leaked waste liquid and tissue.

[0097] Specifically, the first component 13 presses the secondary sealing part 5f between the first component 13 and the motor housing along the axial direction of the motor. That is, the secondary sealing part 5f makes sealing contact with both the first component 13 and the motor housing. The secondary sealing body seals the gap between the first component 13 and the motor housing, preventing waste liquid and the like from passing through the secondary sealing part 5f through the gap between the first component 13 and the motor housing, thus increasing the sealing effect on the third rotational gap 9. At the same time, the main sealing part 5e also makes sealing contact with the first component 13, preventing waste liquid and the like from passing through the main sealing part 5e.

[0098] Specifically, as shown in Figure 18, in one 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, and extends circumferentially around 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, and extends circumferentially around the axis of rotation of the third sealing ring 5. The first sealing lip 5a and the second sealing lip 5b have low structural strength and are easily deformed, thus they can fit well with other components and improve the sealing effect.

[0099] Specifically, the third sealing ring 5 also includes a connecting portion that connects 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 form an annular groove 5c with an opening. The annular groove 5c can reduce the radial strength of the third sealing ring 5, so that the third sealing ring 5 can better fit against the inner wall of the first component 13 and the outer wall of the inner tube 11 in the radial direction, which is also beneficial to the installation of the third sealing ring 5.

[0100] In one embodiment, an elastic support 5d is provided within the annular groove 5c. The elastic support 5d presses the first sealing lip 5a against the outer wall of the inner tube 11 and the second sealing lip 5b against the inner wall of the first component 13 in the radial direction of the third sealing ring 5, thereby increasing the fit of the first sealing lip 5a and the second sealing lip 5b and enhancing the sealing effect. Simultaneously, when the first sealing lip 5a and the second sealing lip 5b wear down, the elastic support 5d can still press the remaining portions of the first sealing lip 5a and the second sealing lip 5b against their respective corresponding components, thus compensating for wear. In one embodiment, the opening direction of the annular groove 5c faces away from the motor housing, which helps prevent the main sealing part 5e of the sealing lip from rolling up when it is fitted into the protruding section, thereby reducing the assembly difficulty of the third sealing ring 5.

[0101] Specifically, the elastic support 5d is usually a metal elastic component such as a metal spring. The metal elastic component can be covered with a plastic coating such as silicone to protect the metal elastic component and provide the metal spring with weather resistance and service life.

[0102] As shown in Figures 4, 9, and 10, in some embodiments, the motor assembly includes a first component 13 and a second component 14. The first component 13 and the second component 14 are respectively fitted over the inner tube 11. The second component 14 is connected to the motor housing, and the first component 13 is directly or indirectly connected to the motor housing. The second component 14 has a second positioning portion positioned at one end of the motor housing, and the first component 13 has a first positioning portion located on the side of the second positioning portion facing away from the motor housing. The first positioning portion, the second positioning portion, and the outer wall of the inner tube 11 form a third sealing cavity 6, and a third sealing ring 5 makes sealing contact with the first positioning portion, the second positioning portion, and the outer wall of the inner tube 11.

[0103] In one embodiment, the third sealing ring 5, together with the first component 13 and the second component 14, forms a sealing structure to seal the third rotational gap 9. The third sealing ring 5 does not need to directly contact the motor housing, reducing the machining precision requirements of the motor housing and thus helping to reduce 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, thereby defining the relative position between the third sealing ring 5 and the motor housing, ensuring a sealing effect.

[0104] Specifically, in one embodiment, the annular receiving space includes a main space and a secondary space that are connected. The main space is radially disposed between the secondary space and the outer wall of the inner tube 11. The third sealing ring 5 includes an integrally formed main sealing part 5e and a secondary sealing part 5f. The main sealing part 5e is disposed within the main space and is in sealing contact with at least the outer wall of the inner tube 11, preventing external liquid from flowing into the third rotation gap 9 from the gap between the main sealing part 5e and the inner tube 11. In one embodiment, the outer surface of the main sealing part 5e is also in sealing contact with the inner wall of the main space, preventing external liquid from flowing into the third rotation gap 9 from the outer surface of the main sealing part 5e over the third sealing ring 5. The secondary sealing part 5f is located within the secondary space and is in sealing contact with the first positioning part and the second positioning part, respectively, preventing external liquid from flowing into the third rotation gap 9 from the outer edge of the secondary sealing part 5f over the outer edge of the secondary sealing part 5f.

[0105] The main space accommodates the main sealing part 5e, and the secondary space accommodates the secondary sealing part 5f. These spaces respectively constrain and limit the main sealing part 5e and the secondary sealing part 5f, preventing the sealing ring from flipping or shifting. The main sealing part 5e and the secondary sealing part 5f provide multi-stage sealing, enhancing the sealing effect.

[0106] The end of the inner tube 11 protrudes through the end structure of the motor housing, as shown in Figures 19 and 20. In some embodiments, a fifth sealing ring 50 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.

[0107] In some embodiments, a plurality of sealing protrusions 52 are sequentially arranged axially on the inner wall of the fifth sealing ring 50. The sealing protrusions 52 are arranged around the axis of the fifth sealing ring 50, which facilitates their fit with the outer wall of the inner tube 11 and improves the sealing effect. The plurality of sealing protrusions 52 form a multi-stage seal, increasing the sealing of the gap between the end cap and the inner tube 11.

[0108] Specifically, as shown in Figure 20, in some embodiments, a skeleton 51 is provided inside the fifth sealing ring 50. The skeleton 51 is annular and surrounds the axis of the fifth sealing ring 50. The skeleton 51 supports the fifth sealing ring 50 and prevents the fifth sealing ring 50 from deforming too much and failing to seal.

[0109] As shown in Figures 11-13, in one embodiment, the output pipe 30 is fixedly disposed relative to the motor housing. The rear end of the output pipe 30 is used to connect to an external pipeline, and the front end of the output pipe 30 is inserted into and sealed to the inner pipe 11. Since the rear end of the output pipe 30 is used to connect to an external pipeline, and the front end of the output pipe 30 is directly and sealed to the inner pipe 11, substances such as lesion tissue and irrigation waste fluid 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 connecting structure between the inner pipe 11 and the output pipe 30, which simplifies the structure of the surgical power device and reduces costs.

[0110] Specifically, as shown in Figure 12, in one embodiment, the front end of the output tube 30 has a docking hole 34 that communicates with the interior of the output tube 30, and the rear end of the inner tube 11, i.e. the rear extension section, is inserted into the docking hole 34. The rotation profile of the rear extension section has a gap with the docking hole 34 so that the inner tube 11 can rotate smoothly within the docking hole 34.

[0111] In the above description, "the rotation profile of the rear end of the inner tube 11 has a gap with the docking hole 34" means that the inner tube 11 does not contact the inner wall of the docking hole 34 during rotation, so as to avoid interference between the inner tube 11 and the inner wall of the docking hole 34 when the inner tube 11 rotates relative to the output tube 30, so that the inner tube 11 and the output tube 30 can rotate flexibly.

[0112] As shown in Figures 11-17, in one 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 rotational gap 7 between the outer wall of the inner tube 11 and the inner wall of the docking hole 34. The second sealing ring 3 seals the first rotational gap 7, thereby providing a seal and preventing waste liquid or other substances in the inner tube 11 from flowing out through the first rotational gap 7 between the inner tube 11 and the docking hole 34. In one embodiment, the second sealing ring 3 simultaneously seals both the first rotational gap 7 and the second rotational gap 8.

[0113] Referring to Figure 21, in one embodiment, the second sealing ring 3 is annular and sleeved on the inner tube 11. The second sealing ring 3 has an annular first sealing part 3a, which is disposed 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 tube 11, and the outer surface of the first sealing part 3a is in sealing contact with the inner surface of the mating hole 34, thereby sealing the first rotation gap 7.

[0114] In one embodiment, a second sealing cavity 4, communicating with the first rotational 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 within the second sealing cavity 4. In this structure, the front end face of the output pipe 30 and the motor assembly 10 jointly position the second sealing ring 3 located within the second sealing cavity 4, thereby providing axial restraint for the second sealing ring 3 disposed therein and preventing sealing failure caused by the movement of the second sealing ring 3.

[0115] Specifically, as shown in Figure 16, a mounting hole 18 coaxial with the axis of the motor assembly 10 is provided on the end face of the motor assembly 10 near the output tube 30. As shown in Figure 15, the front end of the output tube 30 is connected to the mounting hole 18, and the inner wall of the mating hole 34, the inner wall of the mounting hole 18, and the outer wall of the inner tube 11 together form a sealing space including the second sealing cavity 4 and the first rotation gap 7. The second sealing ring 3 is disposed in the second sealing cavity 4. In one embodiment, a gap is formed between the end face of the output tube 30 located in the mounting hole 18 and the bottom of the mounting hole 18, as shown in Figures 14 and 21. The second sealing ring 3 has a second sealing part 3b, which is an annular plate sleeved on the inner tube 11. The second sealing part 3b is distributed in the gap between the end face of the output tube 30 and the bottom of the mounting hole 18. One side of the second sealing part 3b is in sealing contact with the bottom of the mounting hole 18, and the other side of the second sealing part 3b is in sealing contact with the end face of the output tube 30. The second sealing part 3b of the second sealing ring 3 surrounds the inner tube 11, isolating the second sealing cavity 4, thereby forming a secondary seal on the first rotation gap 7 and increasing the sealing effect of the second sealing ring 3 on the first rotation gap 7.

[0116] As shown in Figure 16, in one embodiment, the motor housing includes a housing body and a detachable rear fixing sleeve 15 that fits over the rear end of the housing body. A mounting hole 18 is formed on the rear fixing sleeve 15, which is used for mounting the output pipe 30. In one embodiment, a second sealing ring 3 presses against the bottom of the mounting hole 18, sealing the first rotational gap 7 between the rear end of the motor housing and the inner tube 11, thus increasing the sealing effect on the first rotational gap 7 at the rear end of the motor housing.

[0117] In one embodiment, the inner wall of the mounting hole 18 is provided with threads, and the front end of the output pipe 30 is threaded into the mounting hole 18. Of course, this embodiment does not exclude the possibility that the output pipe 30 is fixed in the mounting hole 18 by welding, snap-fitting, 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. The size of the second sealing cavity 4 in the axial direction of the motor assembly 10 can be adjusted by the threads, thereby adjusting the compression size of the second sealing ring 3 in the gap between the end face of the output pipe 30 and the bottom of the mounting hole 18, ensuring the sealing effect of the second sealing ring 3.

[0118] In one embodiment, the handle 40 includes the handle 40 and the rear end cover 16 at the rear end of the handle 40. The output pipe 30 is provided with a locking sleeve 17 by means of threads. The locking sleeve 17 presses the rear end cover 16 against the rear end of the handle 40. The locking sleeve 17 plays a limiting and locking role on the rear end cover 16.

[0119] In one embodiment, the output tube 30 has a main channel 31 that communicates 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 the tissue and waste liquid in the inner tube 11 from entering the output tube 30 from the inner tube 11 and becoming blocked due to the smaller inner diameter of the output tube 30.

[0120] In one embodiment, the outer diameter of the inner tube 11 is larger than the inner diameter of the main channel 31. This results in a relatively large inner tube 11, which is beneficial for its better mechanical properties and extended service life. Of course, this embodiment does not exclude the possibility that the outer diameter of the inner tube 11 may be less than or equal to the inner diameter of the main channel 31.

[0121] As shown in Figure 13, in one embodiment, the mating hole 34 includes at least a first hole segment 32 and a second hole segment 33. The first hole segment 32, the second hole segment 33, and the main channel 31 are connected sequentially from front to back. The inner diameter of the first hole segment 32 is larger than the inner diameter of the second hole segment 33, and the inner diameter of the second hole segment 33 is larger than the inner diameter of the first hole segment 32. The rear end of the inner tube 11 extends into the second hole segment 33. The second sealing ring 3 is at least partially disposed between the outer wall of the inner tube 11 and the inner wall of the first hole segment 32. This structure allows for a sufficiently large gap in the radial direction between the inner wall of the first hole segment 32 and the outer wall of the inner tube 11, providing a larger installation space for the second sealing ring 3 and a wider range of options. Therefore, by selecting a suitable second sealing ring 3, the sealing performance can be improved.

[0122] In some embodiments, only the front section of the output pipe 30 is coaxially arranged with the inner pipe 11, while the section of the output pipe 30 forming the main channel 31 is off-axis from the inner pipe 11. In one embodiment, the output pipe 30 and the inner pipe 11 are coaxially arranged to ensure the communication area between the inner pipe 11 and the output pipe 30. The discharge from the inner pipe 11 has a consistent radial dimension change and a consistent or similar flow velocity after entering the output pipe 30 in all radial directions, which helps to keep the output pipe 30 unobstructed.

[0123] In one embodiment, the rear end of the output pipe 30 is provided with an anti-detachment structure for connection with a flexible hose. In some embodiments, the anti-detachment structure is a clamp. In one embodiment, the anti-detachment structure is an anti-detachment barb, which can reduce the probability of accidental detachment of the external pipeline, such as a flexible hose, after it is connected to the rear end of the output pipe 30.

[0124] This embodiment also provides a surgical power device, including the planing / grinding handle as described above and a tool assembly 20 adapted to the planing / grinding handle. This embodiment also provides a tool assembly 20 adapted to the planing / grinding handle in one embodiment.

[0125] In summary, the planing / grinding surgical handle of this embodiment has an inner tube inside the rotor, which is coaxial with the rotor and rotates with it. The rear end of the inner blade tube is coaxial with the inner tube, and the front end of the inner tube is connected to the rear end of the inner blade tube in a transmission and sealed manner. The rear end of the inner tube is directly connected to the front end of the output tube in a sealed manner. Therefore, the inner tube of the planing / grinding surgical handle of this application can directly drive the rotation of the inner blade tube. Compared with the prior art, where the rotation axis of the drive motor 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 simpler structure and simplifying the overall structure of the planing / grinding surgical handle. Furthermore, waste fluid and cut tissue in the inner blade tube of the planing / grinding surgical handle of this application can be directly transferred through the sequentially arranged inner tube and output tube. Compared with the prior art, where the output channel is offset from the inner blade tube, there is no additional connecting structure between the inner blade tube and the output channel, resulting in a simpler structure and simplifying the overall structure of the planing / grinding surgical handle.

[0126] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

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: The handle has a connected motor mounting cavity and a tool mounting channel; A motor assembly is 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 is fixedly disposed relative to the motor housing. The rear end of the output tube extends out of the rear end of the handle. The output tube is used to connect to an external pipeline. The front end of the output tube is inserted into and sealed to the rear end of the inner tube. When the tool assembly is installed in the tool mounting channel, the rear end of the inner tool tube is coaxial with and driven by the inner tube, and the inner tube and the inner tool tube are connected by the front end of the inner tube abutting or inserting with the rear end of the inner tool tube.

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

3. The planing / grinding handle according to claim 2, characterized in that: A first connector is provided at the rear end of the inner tube, and a second connector is provided at the front end of the inner tube. When the tool assembly is installed in the tool mounting 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 is formed between the first connector and the second connector, which communicates with the connection gap. A first sealing ring is provided in the first sealing cavity to seal the connection gap.

4. The planing / grinding handle according to claim 3, characterized in that: A torque transmission structure is provided between the first connector and the second connector, and the inner tube drives the inner knife tube to rotate through the torque transmission structure.

5. The planing / grinding handle according to claim 1, characterized in that, The front end of the output tube has a docking hole that communicates with the interior of the output tube. The rear end of the inner tube is inserted into the docking hole, and there is a first rotational clearance between the rotational profile of the rear end of the inner tube and the inner wall of the docking hole.

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

7. The planing / grinding handle according to claim 6, characterized in that, The motor housing has a mounting hole coaxial with the axis of the motor assembly near one end of the output tube, and the front end of the output tube is connected to the mounting hole. The inner wall of the mounting hole is threaded, and the front end of the output tube is threaded into the mounting hole; and / or, the inner wall of the mating hole, the inner wall of the mounting hole, and the outer wall of the inner tube together form a sealing space including a second sealing cavity and the first rotation gap, and the second sealing ring is disposed in the second sealing cavity.

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

9. The planing / grinding handle according to claim 5, characterized in that: The handle includes a handle body and a rear end cap at the rear end of the handle body. A locking sleeve is threaded onto the output tube, and the locking sleeve presses the rear end cap tightly against the rear end of the handle body.

10. The planing / grinding handle according to claim 5, characterized in that: The output tube has a main channel communicating with the docking hole, the inner diameter of the main channel being greater than or equal to the inner diameter of the inner tube; and / or, the outer diameter of the inner tube being greater than the inner diameter of the main channel.

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

12. The planing / grinding handle according to claim 11, characterized in that, The sealing assembly includes: The first component is sleeved outside the protruding section and at least covers the corresponding end of the motor housing. The first component is disposed 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 component and the motor housing. A third sealing ring is disposed in the third sealing cavity. The inner wall of the third sealing ring is in sealing contact with the outer wall of the front extension section, and the outer wall of the third sealing ring is in sealing contact with the inner wall of the first component. A fourth sealing ring is disposed on the first component and makes 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 component.

13. The planing / grinding handle according to claim 12, characterized in that, The third sealing ring includes a main sealing part and a secondary sealing part, which are integrally formed. The main sealing part is radially disposed between the secondary sealing part and the outer wall of the inner tube, and the secondary sealing part is located between the first component and the motor housing.

14. The planing / grinding handle according to claim 13, characterized in that, The main sealing part includes a first sealing lip and a second sealing lip. The first sealing lip is in sealing contact with the outer wall of the inner tube and extends circumferentially along the third sealing ring and is arranged around the rotation axis of the third sealing ring. The second sealing lip is in sealing contact with the inner wall of the first component and extends circumferentially along the third sealing ring and is arranged around the rotation axis of the third sealing ring.

15. The planing / grinding handle according to claim 14, characterized in that, The third sealing ring further includes a connecting portion that connects the first sealing lip and the second sealing lip, and the first sealing lip, the connecting portion, and the second sealing lip form an annular groove with an opening.

16. The planing / grinding handle according to claim 15, characterized in that, An elastic support is provided inside the annular groove. The elastic support presses the first sealing lip against the outer wall of the inner tube in the radial direction of the third sealing ring, and presses the second sealing lip against the inner wall of the first component.

17. The planing / grinding handle according to claim 1, characterized in that, The end of the inner tube extends through the end structure of the motor housing. A fifth sealing ring is provided between the end structure of the motor housing and the inner tube, and the fifth sealing ring seals the gap between the end structure and the inner tube.

18. The planing / grinding handle according to claim 17, characterized in that, The inner wall of the fifth sealing ring is provided with a plurality of sealing protrusions arranged sequentially along the axial direction. The sealing protrusions are arranged around the axis of the fifth sealing ring, and the sealing protrusions are in contact with the outer wall of the inner tube; and / or, The fifth sealing ring is provided with a skeleton, which is annular and surrounds the axis of the fifth sealing ring.

19. A surgical power device, characterized in that, Includes a planing / grinding handle as described in any one of claims 1-18 and a tool assembly adapted to the planing / grinding handle.

20. A cutting tool assembly, characterized in that, The tool assembly is adapted to the planing / grinding handle of any one of claims 1-18.

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