Medical abrasive drill handle and medical abrasive drill device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a medical abrasive drill handle and a medical abrasive drill device.The medical abrasive drill handle comprises a power output shaft, a cutter containing hole used for containing a cutter is formed in the power output shaft in the axial direction, and a cutter locking hole penetrating into the cutter containing hole from the outer wall in the radial direction is formed in the power output shaft; the cutter locking piece is movably arranged in the cutter locking hole and can partially enter or retreat from the cutter containing hole so as to lock or unlock the cutter; the sliding sleeve is sleeved outside the power output shaft in an axial moving manner, and the moving positions of the sliding sleeve comprise a locking stroke position and an unlocking stroke position; the power output shaft is sleeved with the sliding sleeve elastic piece, the sliding sleeve elastic piece abuts against the sliding sleeve so that the sliding sleeve can be kept at the locking stroke position, the sliding sleeve elastic piece is arranged at the far end of the sliding sleeve, the power output shaft is provided with an extension section axially extending towards the far end, an extension hole section of a cutter containing hole is correspondingly formed in the extension section, and the extension section is sleeved with the sliding sleeve elastic piece. According to the utility model, the supporting length of the power output shaft to the cutter is prolonged, and the deformation degree and the chattering amplitude of the cutter in the operation process are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a medical drill handle and a medical drill device. Background Technology

[0002] The handle of a medical grinding drill connects to and drives a compatible cutting tool (grinding head) to rotate, enabling operations such as cutting, grinding, and repairing bone tissue.

[0003] To achieve power transmission, the medical drill handle has a power output shaft inside, and a sliding sleeve outside the power output shaft. The power output shaft also has a tool receiving hole for inserting the tool. The inner wall of the tool receiving hole has a locking hole extending to the outer wall of the power output shaft. A locking element is installed in the locking hole. The sliding sleeve can move axially along the power output shaft under the drive of the operating element on the handle, thereby pushing the locking element into the tool receiving hole to lock the tool, or avoiding the locking element so that the locking element can be pushed out of the tool receiving hole by the tool, thus unlocking the tool.

[0004] However, the axial length of the tool receiving hole on the existing power output shaft is relatively short. For slender tools, there is a problem that the support length of the power output shaft for the tool is insufficient. This not only makes it easy for the tool to deform during surgery, but also makes it difficult to control the vibration amplitude of the tool during surgery. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a medical drill handle and a medical drill device to solve the problem that the power output shaft of the medical drill handle in the prior art does not provide sufficient support length for the cutter, thereby reducing the degree of cutter deformation and reducing the amplitude of cutter vibration during surgery.

[0006] To achieve the above and other related objectives, the technical solution of this utility model is as follows:

[0007] A medical drill handle for connecting a drive tool, the medical drill handle comprising:

[0008] The power output shaft has a tool receiving hole along its axial direction for accommodating a tool, and the power output shaft has a tool locking hole that penetrates radially from the outer wall of the power output shaft into the tool receiving hole;

[0009] A tool locking member is movably disposed within the tool locking hole. The tool locking member can partially enter or exit the tool receiving hole along the extending direction of the tool locking hole to lock or unlock the tool.

[0010] A sliding sleeve is axially movable and sleeved outside the power output shaft. The sliding sleeve has a locking stroke position and an unlocking stroke position. When the sliding sleeve is in the locking stroke position, the sliding sleeve at least partially blocks the tool locking hole to push the tool locking member partially into the tool receiving hole. When the sliding sleeve is in the unlocking stroke position, the sliding sleeve avoids the tool locking member so that the tool locking member can exit the tool receiving hole.

[0011] A sliding sleeve elastic element is fitted onto the power output shaft, and the sliding sleeve elastic element abuts against the sliding sleeve to keep the sliding sleeve in the locking stroke position.

[0012] The elastic element of the sliding sleeve is located at the far end of the sliding sleeve, and the power output shaft has an extension section extending axially towards the far end. An extension hole section corresponding to the tool receiving hole is formed in the extension section, and the elastic element of the sliding sleeve is sleeved outside the extension section.

[0013] Optionally, the medical drill handle further includes a mounting sleeve, the mounting sleeve having an internal receiving space, the receiving space having an elastic abutment surface, and the sliding sleeve elastic element abutting between the elastic abutment surface and the sliding sleeve.

[0014] Optionally, the elastic element abutment surface is formed on the power output shaft;

[0015] or,

[0016] A ball bearing is provided between the power output shaft and the inner wall of the mounting sleeve, and the contact surface of the elastic element is the end face of the inner cage of the ball bearing.

[0017] or,

[0018] The elastic element abutment surface is formed on the mounting sleeve.

[0019] Optionally, the distal end of the sliding sleeve is provided with a groove, and the rear end of the elastic element of the sliding sleeve is located in the groove and axially abuts against the bottom of the groove.

[0020] Optionally, a bushing is fixedly sleeved on the power output shaft, and the bushing is located at the proximal end of the sliding sleeve. The bushing and the elastic element of the sliding sleeve together limit the travel of the sliding sleeve.

[0021] Optionally, the power output shaft is provided with a tool positioning hole extending from the outer wall of the power output shaft to the inner wall of the tool receiving hole. A tool positioning member is provided in the tool positioning hole. The tool positioning member is used to abut against the tail plane of the tool to limit the tool in the circumferential direction. The bushing is provided at the tool positioning hole to limit the radial displacement of the tool positioning member.

[0022] Optionally, the medical drill handle further includes:

[0023] A push sleeve is axially movable and sleeved outside the power output shaft. The push sleeve abuts against the sliding sleeve to apply a force to the sliding sleeve in the opposite direction to the elastic element of the sliding sleeve.

[0024] A locking sleeve is fitted over the mounting sleeve and is operably rotatable about the axial direction of the mounting sleeve. A transmission structure is provided between the locking sleeve and the sliding sleeve to convert the rotational motion of the locking sleeve into the movement motion of the pushing sleeve.

[0025] Optionally, the transmission structure includes:

[0026] A guide groove is provided on the inner wall of the lock sleeve and extends along the axial direction of the lock sleeve;

[0027] A spiral groove is provided on the side wall of the mounting sleeve and extends through the wall thickness direction of the mounting sleeve; the spiral groove is a cylindrical groove.

[0028] A limiting annular groove is coaxially disposed on the outer peripheral wall of the push sleeve;

[0029] A power transmission component is provided in the guide groove, the spiral groove and the limiting ring groove, so that the circumferential rotation of the locking sleeve is converted into the axial movement of the push sleeve, thereby driving the axial movement of the sliding sleeve.

[0030] Optionally, the distal and proximal ends of the power output shaft are respectively disposed within the receiving space of the mounting sleeve via a first bearing and a second bearing. The sliding sleeve and the push sleeve are located between the first bearing and the second bearing. The distal end of the push sleeve abuts against the first bearing via a push sleeve elastic member. The push sleeve elastic member is sleeved on the outside of the sliding sleeve elastic member. The push sleeve elastic member and the second bearing together limit the travel of the push sleeve.

[0031] Based on the same concept, this utility model also provides a medical grinding drill device, including the medical grinding drill handle as described above and a cutting tool adapted to the medical grinding drill handle, wherein the outer wall of the cutting tool is provided with a locking groove for the cutting tool locking member to be inserted.

[0032] As described above, the present invention has the following beneficial effects:

[0033] By setting a sliding sleeve elastic element that is fitted onto the power output shaft and placing the sliding sleeve elastic element at the distal end of the sliding sleeve, the power output shaft has an extended section that extends axially to the distal end. An extended section with a corresponding extended hole for the tool receiving hole is formed in this extended section, and the sliding sleeve elastic element is fitted outside the extended section. In this way, the length of the tool receiving hole of the power output shaft is extended, thereby extending the support length of the power output shaft for the tool. This helps to reduce the degree of tool deformation and reduce the amplitude of tool vibration during surgery. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the external structure of the knife and medical drill handle assembly according to an embodiment of the present utility model;

[0035] Figure 2 This is a cross-sectional view of the assembly of the cutting tool and the handle of the medical grinding drill according to an embodiment of the present invention;

[0036] Figure 3 A partial structural cross-section of the medical drill handle according to an embodiment of this utility model. Figure 1 ;

[0037] Figure 4 This is a partial cross-sectional view of the medical drill handle in an embodiment of the present invention. Figure 2 ;

[0038] Figure 5 This is a partial structural diagram of the medical drill handle in an embodiment of the present invention (excluding the locking sleeve);

[0039] Figure 6 This is a schematic diagram of the structure of the mounting sleeve in an embodiment of this utility model;

[0040] Figure 7 This is a cross-sectional view of the power output shaft in an embodiment of the present invention. Figure 1 ;

[0041] Figure 8 This is a cross-sectional view of the power output shaft in an embodiment of the present invention. Figure 2 (AA direction);

[0042] Figure 9 This is a schematic diagram of the lock sleeve in an embodiment of the present utility model;

[0043] Figure 10 This is a cross-sectional view of the lock sleeve in an embodiment of this utility model;

[0044] Figure 11 This is a schematic diagram of the push sleeve structure in an embodiment of this utility model;

[0045] Figure 12 This is a schematic diagram of the tool structure in an embodiment of the present utility model. Figure 1 ;

[0046] Figure 13 This is a schematic diagram of the tool structure in an embodiment of the present utility model. Figure 2 .

[0047] Explanation of reference numerals in the attached figures

[0048] 100-Medical drill handle;

[0049] 11-Mounting sleeve; 111-Helical groove;

[0050] 12-Power output shaft; 120-Elastic element contact surface; 121-Tool receiving hole; 122-Tool locking hole; 123-Tool positioning hole;

[0051] 13-Sliding sleeve; 131-Groove portion;

[0052] 14-Bushing;

[0053] 15-Push sleeve; 151-Limiting ring groove;

[0054] 16-Locking sleeve; 161-Guide groove;

[0055] 17-Tool locking component; 18-Power transmission component; 19-Tool positioning component;

[0056] 20 - First bearing; 21 - Second bearing;

[0057] 22-Sliding sleeve elastic element; 23-Push sleeve elastic element;

[0058] 24-Locking threaded sleeve; 25-Connecting threaded sleeve;

[0059] 200 - Cutting tool; 210 - Locking groove; 220 - Power unit. Detailed Implementation

[0060] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model 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 utility model.

[0061] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0062] In the description of the following embodiments, "axial direction" refers to the axial direction of the entire medical drill handle; in the description of the following embodiments, the directional terms "distal end" and "proximal end" are relative directions, with "distal end" referring to the direction of the drill bit that is axially close to the cutting tool and "proximal end" referring to the direction of the drill bit that is axially away from the cutting tool.

[0063] Please combine Figures 1 to 5 As shown, this utility model provides a medical drill handle 100 for connecting a cutting tool 200 and driving the cutting tool 200 to rotate. The medical drill handle 100 includes: a power output shaft 12, a cutting tool locking member 17, a sliding sleeve 13, and a sliding sleeve elastic member 22. The power output shaft 12 has an axially oriented cutting tool receiving hole 121 for accommodating the cutting tool 200. The power output shaft 12 also has a cutting tool locking hole 122 that radially penetrates from the outer wall of the power output shaft 12 into the cutting tool receiving hole 121. The cutting tool locking member 17 is movably disposed within the cutting tool locking hole 122 and can partially enter or exit the cutting tool receiving hole 121 along the extending direction of the cutting tool locking hole 122 to lock or unlock the cutting tool 200. The sliding sleeve 13 is axially movably sleeved outside the power output shaft 12. The movement of the sliding sleeve 13... The positions include a locking stroke position and an unlocking stroke position. When the sliding sleeve 13 is in the locking stroke position, the sliding sleeve 13 at least partially blocks the tool locking hole 122 to partially push the tool locking member 17 into the tool receiving hole 121. When the sliding sleeve 13 is in the unlocking stroke position, the sliding sleeve 13 avoids the tool locking member 17 so that the tool locking member 17 can exit the tool receiving hole 121. The sliding sleeve elastic member 22 is sleeved on the power output shaft 12. The sliding sleeve elastic member 22 abuts against the sliding sleeve 13 to keep the sliding sleeve 13 in the locking stroke position. The sliding sleeve elastic member 22 is located at the distal end of the sliding sleeve 13. The power output shaft 12 has an extension section extending axially to the distal end. An extension hole section corresponding to the tool receiving hole 121 is formed in the extension section. The sliding sleeve elastic member 22 is sleeved on the outside of the extension section.

[0064] Specifically, the tail of the cutting tool 200 is provided with a locking groove 210 for the cutting tool locking member 17 to be inserted (see reference). Figure 12 and Figure 13 In this example, the locking groove 210 is an annular groove arranged around the circumference of the tool 200. A tool locking member 17 is movably embedded in the tool locking hole 122 provided on the peripheral side wall of the power output shaft 12. The tool receiving hole 121 is located at the center of the power output shaft 12 and is used to receive the tool 200. When the tool 200 is locked in the power output shaft 12, it can rotate synchronously with the power output shaft 12.

[0065] When the tool locking member 17 enters the tool receiving hole 121 and is restricted from radial movement, the tool locking member 17 can be embedded in the locking groove 210 of the tool 200, and the tool 200 is axially locked and cannot be pulled out; when the tool locking member 17 exits the tool receiving hole 121, even if the tool locking member 17 exits the locking groove 210 of the tool 200, the tool 200 can move axially and can be freely dislodged.

[0066] The axial movement of the sliding sleeve 13 allows the tool locking member 17 to enter or exit the tool receiving hole 121, thereby locking or unlocking the tool 200. Two tool locking holes 122 are symmetrically formed radially on the peripheral sidewall of the power output shaft 12. Each tool locking hole 122 communicates with the tool receiving hole 121 inside the power output shaft 12. The tool locking holes 122 are located near the proximal end of the power output shaft 12, and the tool locking member 17 is movably installed within the tool locking hole 122. When the sliding sleeve 13 moves to the locking stroke position, it at least partially covers the tool locking hole 122, allowing the tool locking member 17 to be pushed into the tool receiving hole 121 (and thus into the locking groove 210). At this time, the tool 200 is locked and cannot be dislodged. When the sliding sleeve 13 moves to the unlocking stroke position, the tool locking hole 122 is exposed, allowing the tool locking member 17 to move freely radially and exit the tool receiving hole 121 (and also exit the locking groove 210). At this time, the tool 200 can be freely inserted or removed. The axial movement of the sliding sleeve 13 achieves the opening and closing of the tool locking hole 122. When the tool locking hole 122 is partially or completely covered by the sliding sleeve 13, the tool 200 is locked and cannot be dislodged. When the sliding sleeve 13 moves to expose the tool locking hole 122, the tool 200 is unlocked and can be dislodged. The above structure allows for a detachable connection between the cutting tool 200 and the medical drill handle 100, making it convenient for users to replace different types of cutting tools 200 as needed. This improves the versatility and flexibility of cutting tool replacement and ensures a reliable connection between the cutting tool 200 and the medical drill handle 100, preventing the cutting tool 200 from coming off.

[0067] The elastic element 22 of the sliding sleeve abuts against the distal end of the sliding sleeve 13, thereby limiting the sliding sleeve 13 in its natural state. That is, in its natural state, the sliding sleeve 13 is kept in the locked stroke position to ensure that the tool 200 is in the locked state. Since the elastic element 22 of the sliding sleeve is located at the distal end of the sliding sleeve 13, the power output shaft 12 has an extension section extending axially to the distal end. An extension section of the tool receiving hole 121 is formed in the extension section, and the elastic element 22 of the sliding sleeve is sleeved outside the extension section. In this way, the length of the tool receiving hole 121 of the power output shaft 12 is extended, thereby extending the support length of the power output shaft 12 for the tool 200. This helps to reduce the degree of deformation of the tool 200 and reduce the vibration amplitude of the tool 200 during surgery.

[0068] In some embodiments, the medical drill handle 100 further includes a mounting sleeve 11, the mounting sleeve 11 having an internal receiving space, and an elastic abutment surface 120 formed within the receiving space. The sliding sleeve elastic element 22 abuts between the elastic abutment surface 120 and the sliding sleeve 13. Specifically, the mounting sleeve 11 has an internal receiving space, and the receiving space has an elastic abutment surface 120. The power output shaft 12 is rotatably disposed within this receiving space, and the sliding sleeve 13 is also located within this receiving space. The two ends of the sliding sleeve elastic element 22 abut against the elastic abutment surface 120 and the sliding sleeve 13, respectively.

[0069] In the above embodiments, the elastic element abutment surface 120 is formed on the power output shaft 12; or, a ball bearing is provided between the power output shaft 12 and the inner wall of the mounting sleeve 11, and the elastic element abutment surface 120 is the end face of the inner cage of the ball bearing; or, the elastic element abutment surface 120 is formed on the mounting sleeve 11. Specifically, the elastic element abutment surface 120 is formed in the accommodating space inside the mounting sleeve 11, the distal end of the sliding sleeve elastic element 22 abuts against the elastic element abutment surface 120, and the proximal end of the sliding sleeve elastic element 22 abuts against the sliding sleeve 13. The elastic abutment surface 120 may be formed on the power output shaft 12. For example, the elastic abutment surface 120 may be formed on the distal shoulder of the power output shaft 12; or, a ball bearing is provided between the distal end of the power output shaft 12 and the mounting sleeve 11, and the elastic abutment surface 120 may be formed on the end face of the inner cage of the ball bearing; or, the elastic abutment surface 120 may be formed on the inner wall of the receiving space of the mounting sleeve 11. For example, a protrusion structure is provided on the inner wall of the receiving space of the mounting sleeve 11, and the elastic abutment surface 120 is formed on the protrusion structure.

[0070] See Figure 4 In the above embodiment, the distal end of the sliding sleeve 13 is provided with a groove 131, and the rear end of the sliding sleeve elastic member 22 is located in the groove 131 and axially abuts against the bottom of the groove 131. Specifically, by providing a groove 131 with an opening parallel to the axial direction of the sliding sleeve 13 at the distal end of the sliding sleeve 13, a limiting space is formed between the groove 131 and the power output shaft 12. The sliding sleeve elastic member 22 is sleeved on the outside of the power output shaft 12, and the rear end (proximal end) of the sliding sleeve elastic member 22 is located in the groove 131 and abuts against the bottom of the groove 131. This can enhance the installation reliability of the sliding sleeve elastic member 22, ensure the positioning stability of the sliding sleeve elastic member 22, and thus make the sliding sleeve elastic member 22 more stable and reliable when exerting elastic force on the sliding sleeve 13.

[0071] Continue reading Figure 4In the above embodiment, a bushing 14 is fixedly sleeved on the power output shaft 12, and the bushing 14 is located at the proximal end of the sliding sleeve 13. The bushing 14 and the sliding sleeve elastic member 22 together limit the travel of the sliding sleeve 13. Specifically, the bushing 14 and the sliding sleeve elastic member 22 limit the axial movement of the sliding sleeve 13 between the bushing 14 and the elastic member abutment surface 120. When no external force is applied, the sliding sleeve elastic member 22 causes the proximal end of the sliding sleeve 13 to abut against the distal end of the bushing 14, and causes the sliding sleeve 13 to cover the tool locking hole 122.

[0072] See Figure 4 , Figure 7 and Figure 8 In the above embodiment, the power output shaft 12 is provided with a tool positioning hole 123 extending from the outer wall of the power output shaft 12 to the inner wall of the tool receiving hole 121. A tool positioning member 19 is provided in the tool positioning hole 123. The tool positioning member 19 is used to abut against the tail plane of the tool 200 to circumferentially limit the tool 200. The bushing 14 is covered at the tool positioning hole 123 to limit the radial displacement of the tool positioning member 19. Specifically, two tool positioning holes 123 are symmetrically opened radially on the peripheral sidewall of the power output shaft 12. Each tool positioning hole 123 communicates with the tool receiving hole 121 of the power output shaft 12. The tool positioning holes 123 are closer to the proximal end of the power output shaft 12 than the tool locking holes 122, and the center lines of the two tool positioning holes 123 are perpendicular to the center lines of the two tool locking holes 122. Each tool positioning hole 123 is provided with a tool positioning element 19. A bushing 14 is fixedly sleeved on the power output shaft 12 and corresponds to the tool positioning hole 123. The bushing 14 is elastic and can limit the radial movement of the tool positioning element 19. A power unit 220 is provided at the tail of the tool 200 (see...). Figure 12 and Figure 13 The power unit 220 transmits power when the cutting tool 200 is connected to the medical drill handle 100. The cutting tool positioning member 19 abuts against the power unit 220 at the tail of the cutting tool 200 when the cutting tool 200 is inserted into the cutting tool receiving hole 121. The power unit 220, for example, has a flat rectangular structure. The abutment between the power unit 220 and the two symmetrically arranged cutting tool positioning members 19 restricts the circumferential rotation of the cutting tool 200 and transmits torque. Through the circumferential locking effect of the cutting tool positioning members 19, the power output shaft 12 can more effectively transmit power to the cutting tool 200. Thus, by circumferentially locking the cutting tool 200 with the cutting tool positioning member 19 and axially locking the cutting tool 200 with the cutting tool locking member 17, the cutting tool 200 is locked onto the medical drill handle 100.

[0073] See Figure 3It should be noted that the medical drill handle 100 further includes a push sleeve 15 and a locking sleeve 16. The push sleeve 15 is axially movable and sleeved outside the power output shaft 12. The push sleeve 15 abuts against the sliding sleeve 13 to apply a force to the sliding sleeve 13 in the opposite direction to the elastic element 22 of the sliding sleeve. The locking sleeve 16 is sleeved outside the mounting sleeve 11 and is operably rotatable about the axial direction of the mounting sleeve 11. A transmission structure is provided between the locking sleeve 16 and the sliding sleeve 13 to convert the rotational action of the locking sleeve 16 into the movement action of the push sleeve 15. Specifically, the locking sleeve 16 is sleeved outside the mounting sleeve 11, and the push sleeve 15 is disposed inside the mounting sleeve 11. The push sleeve 15 is located near the end of the sliding sleeve 13. By operating the locking sleeve 16 to rotate in different directions, the push sleeve 15 can be reciprocated on the power output shaft 12 by relying on the transmission structure, which can enable the tool locking member 17 to enter or exit the tool receiving hole 121, thereby realizing the locking or unlocking of the tool 200.

[0074] See Figure 4 and Figure 5 In the above embodiment, the transmission structure includes a power transmission component 18, which cooperates with the locking sleeve 16, the mounting sleeve 11, and the push sleeve 15. The circumferential rotation of the locking sleeve 16 is converted into the axial movement of the push sleeve 15 through the power transmission component 18, thereby driving the sliding sleeve 13 to move axially. Specifically, the locking sleeve 16 is sleeved outside the mounting sleeve 11, and the push sleeve 15 is disposed inside the mounting sleeve 11. The circumferential rotation of the power output shaft 12 and the locking sleeve 16 is converted into the axial movement of the push sleeve 15 by the transmission action of the power transmission component 18. The axial movement of the push sleeve 15 will drive the sliding sleeve 13 to move axially along the power output shaft 12, thereby realizing the locking or unlocking of the tool 200. When the locking sleeve 16 is rotated in the first direction, the push sleeve 15 can be pushed by the power transmission member 18 to move the sliding sleeve 13 toward the far end of the power output shaft 12 (at this time, the elastic member 22 of the sliding sleeve is compressed), thereby exposing the tool locking hole 122, allowing the tool locking member 17 to exit the tool receiving hole 121, and the tool 200 can be freely inserted into or removed from the tool receiving hole 121 of the power output shaft 12; when the locking sleeve 16 is rotated in the second direction, the push sleeve 15 can be moved by the power transmission member 18 toward the proximal end of the power output shaft 12, and the sliding sleeve 13 also moves toward the proximal end of the power output shaft 12 under the elastic force of the sliding sleeve elastic member 22, thereby allowing the sliding sleeve 13 to block the tool locking hole 122, pressing the tool locking member 17 into the tool receiving hole 121, and locking the tool 200.

[0075] In the above embodiment, the transmission structure further includes a guide groove 161, a spiral groove 111, and a limiting buffer 151, wherein the guide groove 161 is disposed on the inner wall of the locking sleeve 16 and extends along the axial direction of the locking sleeve 16 (see...). Figure 9 and Figure 10The spiral groove 111 is provided on the peripheral sidewall of the mounting sleeve 11 and extends through the wall thickness direction (see...). Figure 6 The spiral groove 111 is a cylindrical groove, meaning that the axial direction of the spiral groove 111 overlaps with the axial direction of the mounting sleeve 11. The spiral groove 111 roughly resembles an inclined groove relative to the axial direction of the mounting sleeve 11. The limiting ring groove 151 is coaxially disposed on the outer peripheral wall of the push sleeve 15 (see...). Figure 11 The power transmission component 18 is located simultaneously in the guide groove 161, the spiral groove 111 and the limiting ring groove 151, so that the circumferential rotation of the locking sleeve 16 is converted into the axial movement of the push sleeve 15, thereby driving the sliding sleeve 13 to move axially. Specifically, the locking sleeve 16 is fitted outside the mounting sleeve 11, and the push sleeve 15 is located inside the mounting sleeve 11. In this embodiment, two guide grooves 161 are symmetrically arranged on the locking sleeve 16. The guide grooves 161 extend along the axial direction of the locking sleeve 16, and the guide grooves 161 are arc-shaped along the cross section perpendicular to the locking sleeve 16. The groove opening of the guide groove 161 communicates with the interior of the locking sleeve 16. The guide grooves 161 allow the power transmission component 18 to move axially inside the locking sleeve 16. Two spiral grooves 111 are also correspondingly arranged on the mounting sleeve 11. When the locking sleeve 16 rotates relative to the mounting sleeve 11, the power transmission component 18 located in the spiral groove 111 will gradually change along the spiral path and can convert the circumferential rotation of the locking sleeve 16 into the axial movement of the push sleeve 15. The limiting ring groove 151 is arranged circumferentially at the rear end of the push sleeve 15, and the front end of the push sleeve 15 is close to the sliding sleeve 13. Because the spiral groove 111 extends in a spiral shape, when the locking sleeve 16 is rotated, the power transmission component 18 moves along the spiral groove 111 with the rotation of the locking sleeve 16, and is converted into axial movement along the mounting sleeve 11 under the action of the guide groove 161 of the mounting sleeve 11. Since the power transmission component 18 is also within the limiting ring groove 151 of the push sleeve 15, it can synchronously drive the push sleeve 15 to move axially on the power output shaft 12. The power transmission component 18 is simultaneously located within the guide groove 161, the spiral groove 111, and the limiting ring groove 151. This multi-constraint and guiding mechanism makes the locking process more precise and reliable. Through synergistic action, they jointly realize the conversion of the rotation of the locking sleeve 16 into the axial movement of the push sleeve 15, thereby achieving the axial movement of the sliding sleeve 13.

[0076] See Figure 3 and Figure 4In the above embodiment, the distal and proximal ends of the power output shaft 12 are respectively disposed within the receiving space of the mounting sleeve 11 via a first bearing 20 and a second bearing 21. The sliding sleeve 13 and the push sleeve 15 are located between the first bearing 20 and the second bearing 21. The distal end of the push sleeve 15 abuts against the first bearing 20 via a push sleeve elastic member 23. The push sleeve elastic member 23 is sleeved on the outside of the sliding sleeve elastic member 22. The push sleeve elastic member 23 and the second bearing 21 together limit the travel of the push sleeve 15. Specifically, the first bearing 20 is sleeved on the front end of the power output shaft 12, and the second bearing 21 is sleeved on the rear end of the power output shaft 12. The power output shaft 12 is rotatably connected to the mounting sleeve 11 via the first bearing 20 and the second bearing 21, ensuring stable support and accurate positioning of the power output shaft 12 within the mounting sleeve 11. In this embodiment, the two ends of the sliding sleeve elastic element 22 abut against the front shoulder of the power output shaft 12 and the far end of the sliding sleeve 13, so that the sliding sleeve 13 always covers the tool locking hole 122 when there is no external force; the push sleeve elastic element 23 makes the near end of the push sleeve 15 contact the outer ring of the second bearing 21 in the natural state. When there is no external force, there is an axial gap between the push sleeve 15 and the sliding sleeve 13. When the power output shaft 12 rotates, the push sleeve elastic element 23 and the push sleeve 15 remain stationary.

[0077] It should be noted that the bushing 14 is located between the power output shaft 12 and the push sleeve 15, and the proximal end of the bushing 14 abuts against the second bearing 21. When no external force is applied, the proximal end of the sliding sleeve 13 abuts against the distal end of the bushing 14 under the action of the sliding sleeve elastic element 22. The length of the bushing 14 along the axial direction of the power output shaft 12 is greater than the length of the push sleeve 15 along the axial direction of the power output shaft 12, so that when no external force is applied, the distal end of the bushing 14 can abut against the proximal end of the sliding sleeve 13, so that there is an axial gap between the push sleeve 15 and the sliding sleeve 13.

[0078] See Figure 3 In some embodiments, the medical drill handle 100 further includes a locking sleeve 24 and a connecting sleeve 25. The locking sleeve 24 is fitted onto the mounting sleeve 11 and axially abuts against the interior of the locking sleeve 16. The connecting sleeve 25 is fitted onto the mounting sleeve 11 and abuts against the rear end of the locking sleeve 16. The locking sleeve 24 and the connecting sleeve 25 together axially limit the locking sleeve 16. Specifically, the locking sleeve 24 is located near the front end of the mounting sleeve 11 and is threadedly connected to the mounting sleeve 11. The connecting sleeve 25 is located at the rear end of the locking sleeve 16 and is threadedly connected to the mounting sleeve 11. The locking sleeve 24 and the connecting sleeve 25 together restrict the axial movement of the locking sleeve 16, but allow the locking sleeve 16 to rotate axially around the mounting sleeve 11. This helps the locking sleeve 16 maintain its predetermined position and stability during installation and use, thereby ensuring the precise operation and reliability of the medical drill handle 100.

[0079] Based on the same concept, this utility model also provides a medical grinding drill device, including the medical grinding drill handle 100 as described above and a cutting tool 200 adapted to the medical grinding drill handle 100. The outer wall of the cutting tool 200 is provided with a locking groove 210 for the cutting tool locking member 17 to be inserted (see reference). Figure 12 and Figure 13 Specifically, in this example, the locking groove 210 is an annular groove arranged around the circumference of the tool 200. The locking groove 210 can be adapted to the tool locking member 17. When the tool locking member 17 enters the locking groove 210, the tool 200 can be locked; when the tool locking member 17 exits the locking groove 210, the tool 200 can be unlocked.

[0080] In summary, the medical drill handle 100 and medical drill device provided by this utility model, by setting a sliding sleeve elastic member 22 sleeved on the power output shaft 12, and the sliding sleeve elastic member 22 abutting against the elastic member contact surface 120 and the sliding sleeve 13 respectively, and the sliding sleeve elastic member 22 is located at the far end of the sliding sleeve 13, so that the power output shaft 12 forms a part of the tool receiving hole 121 in the axial position corresponding to the sliding sleeve elastic member 22, thereby extending the support length of the power output shaft 12 for the tool 200, thereby reducing the degree of deformation of the tool 200 during the operation, and also reducing the vibration amplitude of the tool 200 during the operation.

[0081] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A medical grinding drill handle for connecting a driving tool, characterized in that, The medical drill handle includes: The power output shaft has a tool receiving hole along its axial direction for accommodating a tool, and the power output shaft has a tool locking hole that penetrates radially from the outer wall of the power output shaft into the tool receiving hole; A tool locking member is movably disposed within the tool locking hole. The tool locking member can partially enter or exit the tool receiving hole along the extending direction of the tool locking hole to lock or unlock the tool. A sliding sleeve is axially movable and sleeved outside the power output shaft. The sliding sleeve has a locking stroke position and an unlocking stroke position. When the sliding sleeve is in the locking stroke position, the sliding sleeve at least partially blocks the tool locking hole to push the tool locking member partially into the tool receiving hole. When the sliding sleeve is in the unlocking stroke position, the sliding sleeve avoids the tool locking member so that the tool locking member can exit the tool receiving hole. A sliding sleeve elastic element is fitted onto the power output shaft, and the sliding sleeve elastic element abuts against the sliding sleeve to keep the sliding sleeve in the locking stroke position. The elastic element of the sliding sleeve is located at the far end of the sliding sleeve, and the power output shaft has an extension section extending axially towards the far end. An extension hole section corresponding to the tool receiving hole is formed in the extension section, and the elastic element of the sliding sleeve is sleeved outside the extension section.

2. The medical drill handle according to claim 1, characterized in that, The medical drill handle also includes a mounting sleeve, the mounting sleeve having an internal accommodating space, and an elastic abutting surface formed within the accommodating space, the sliding sleeve elastic element abutting between the elastic abutting surface and the sliding sleeve.

3. The medical drill handle according to claim 2, characterized in that, The elastic element abutment surface is formed on the power output shaft; or, A ball bearing is provided between the power output shaft and the inner wall of the mounting sleeve, and the contact surface of the elastic element is the end face of the inner cage of the ball bearing. or, The elastic element abutment surface is formed on the mounting sleeve.

4. The medical drill handle according to claim 1, characterized in that, The distal end of the sliding sleeve is provided with a groove, and the rear end of the elastic element of the sliding sleeve is located in the groove and axially abuts against the bottom of the groove.

5. The medical drill handle according to claim 1, characterized in that, A bushing is fixedly sleeved on the power output shaft, and the bushing is located at the proximal end of the sliding sleeve. The bushing and the elastic element of the sliding sleeve together limit the travel of the sliding sleeve.

6. The medical drill handle according to claim 5, characterized in that, The power output shaft is provided with a tool positioning hole extending from the outer wall of the power output shaft to the inner wall of the tool receiving hole. A tool positioning member is provided in the tool positioning hole. The tool positioning member is used to abut against the tail plane of the tool to limit the tool in the circumferential direction. The bushing is provided at the tool positioning hole to limit the radial displacement of the tool positioning member.

7. The medical drill handle according to claim 2, characterized in that, The medical drill handle also includes: A push sleeve is axially movable and sleeved outside the power output shaft. The push sleeve abuts against the sliding sleeve to apply a force to the sliding sleeve in the opposite direction to the elastic element of the sliding sleeve. A locking sleeve is fitted over the mounting sleeve and is operably rotatable about the axial direction of the mounting sleeve. A transmission structure is provided between the locking sleeve and the sliding sleeve to convert the rotational motion of the locking sleeve into the movement motion of the pushing sleeve.

8. The medical drill handle according to claim 7, characterized in that, The transmission structure includes A guide groove is provided on the inner wall of the lock sleeve and extends along the axial direction of the lock sleeve; A spiral groove is provided on the side wall of the mounting sleeve and extends through the wall thickness direction of the mounting sleeve; the spiral groove is a cylindrical groove. A limiting annular groove is coaxially disposed on the outer peripheral wall of the push sleeve; A power transmission component is provided in the guide groove, the spiral groove and the limiting ring groove, so that the circumferential rotation of the locking sleeve is converted into the axial movement of the push sleeve, thereby driving the axial movement of the sliding sleeve.

9. The medical drill handle according to claim 7, characterized in that, The distal and proximal ends of the power output shaft are respectively disposed in the receiving space of the mounting sleeve via the first bearing and the second bearing. The sliding sleeve and the push sleeve are located between the first bearing and the second bearing. The distal end of the push sleeve abuts against the first bearing via the push sleeve elastic element. The push sleeve elastic element is sleeved on the outside of the sliding sleeve elastic element. The push sleeve elastic element and the second bearing together limit the movement stroke of the push sleeve.

10. A medical grinding and drilling device, characterized in that, The invention includes a medical drill handle as described in any one of claims 1-9 and a cutting tool adapted to the medical drill handle, wherein the outer wall of the cutting tool is provided with a locking groove for the cutting tool locking member to be inserted.

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