Quick release chuck of orthopedic tool

Abstract

The utility model relates to the technical field of surgical instruments, in particular to a quick-release chuck of an orthopedic tool, the orthopedic tool comprises a main machine and a cutter, the cutter is connected with the main machine through a quick-release connector, the quick-release chuck comprises a holder, a clamping module, an unlocking ferrule and an unlocking module, the holder is provided with an inner cavity, and the clamping module is connected with the unlocking ferrule. The clamping module is rotationally arranged in the inner cavity through a sliding bearing and is provided with a clamping hole capable of containing a cutter, the unlocking ferrule is arranged outside the retainer in a sleeving mode, an operation cavity capable of containing the unlocking module is formed, the clamping module comprises a shaft sleeve, a lock sleeve and cutter locking steel balls, a plurality of steel ball holes are formed in the output section in the circumferential direction, and the cutter locking steel balls are arranged in the steel ball holes. The shaft sleeve is in sliding fit with the lock sleeve through the pressure spring, and the lock sleeve is in sliding fit with the retainer through the unlocking module. According to the quick-release chuck, the quick-release chuck is additionally arranged between the main machine and the cutter, stable clamping of the cutter is achieved, unlocking is convenient, exposed rotating pieces are reduced as much as possible, and tissue damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to a quick-release chuck of an orthopedic tool. Background Art

[0002] With the continuous development of orthopedic power tools, many tools with interfaces have been developed. The tools not only need to be firmly clamped on the interface, but also need to be able to be quickly removed to facilitate surgical personnel to replace tools of different sizes or functions. In spinal surgery, orthopedics and neurosurgery, it is necessary to rotate the scalpel to drill, grind and file the bone to grind and cut the diseased bone tissue and open the internal channel; therefore, it is necessary to drive the cutter head to rotate and have a certain degree of operability, so it is necessary to be equipped with a control host and a handle that transmits power to the cutter head. The control host drives and controls the cutter head by controlling the motor built into the power handle to successfully complete the surgical process. The two commonly used rotating interfaces, the large AO interface and the Hudson interface, both lock the positioning groove surface on the tool with a steel ball, and push the outer ring sleeve to lock the steel ball through the compression spring. When unlocking, the outer ring sleeve is retracted to unlock the steel ball and remove the tool. Therefore, during use, the outer ring sleeve will rotate with the rotation of the tool. During use, due to the long length of the rotating section, the increased rotating section during the operation will not only affect the rotation accuracy of the tool, but also affect the surgical operation, and wear the normal bone and flesh tissue. The backward unlocking method requires a larger unlocking force, and the force required for unlocking is also larger. Utility Model Content

[0003] In order to solve the problem that the existing tool chuck is difficult to disassemble and is prone to tissue damage, the utility model provides a quick-release chuck for orthopedic tools. By adding a quick-release chuck between the main machine and the tool, the tool can be stably clamped and unlocked easily, and the exposed rotating parts are reduced as much as possible to avoid tissue damage.

[0004] The utility model provides a quick-release chuck for orthopedic tools. The orthopedic tools include a main machine and a tool. The tool is connected to the main machine through a quick-release joint. The quick-release chuck includes a holder, a clamping module, an unlocking ring and an unlocking module. The holder is provided with an inner cavity. The clamping module is rotatably arranged in the inner cavity through a sliding bearing. The clamping module is provided with a clamping hole that can accommodate the tool. The unlocking ring is sleeved on the outside of the holder to form an operating cavity that can accommodate the unlocking module. The tool is stably clamped by the clamping module, and then the unlocking ring drives the unlocking module to move, so as to release the clamping state and facilitate the replacement of the tool.

[0005] Furthermore, the clamping module includes a shaft sleeve, a locking sleeve and a knife-locking steel ball. The shaft sleeve has an input section close to the main machine and an output section far from the main machine. The diameter of the input section is smaller than the diameter of the output section. The output section is circumferentially provided with a plurality of steel ball holes. The knife-locking steel ball is placed in the steel ball holes. The shaft sleeve slides with the locking sleeve through a compression spring, so that the knife-locking steel ball is radially displaced in the steel ball holes. The locking sleeve slides with the retaining frame through the unlocking module. The locking sleeve drives the knife-locking steel ball to move. After the knife is locked, the locking sleeve will return to its original position under the rebound effect of the compression spring.

[0006] Furthermore, the inner wall of the lock sleeve is provided with an unlocking surface and a locking surface which cooperate with the outer wall of the output section in sequence, and the diameter of the unlocking surface is larger than the diameter of the locking surface. The unlocking and locking of the clamping module are achieved through the cooperation of the unlocking surface and the locking surface.

[0007] Furthermore, a transition slope is formed between the input section and the output section, and the inner wall of the lock sleeve is also provided with a limit protrusion that abuts against the transition slope. The transition slope and the limit protrusion cooperate to ensure that the shaft sleeve and the lock sleeve return to their proper positions under the action of the compression spring.

[0008] Furthermore, a flange sleeve is provided at the end of the input section, and a compression spring is sleeved outside the input section and arranged between the limiting protrusion and the flange sleeve, so that the limiting protrusion abuts against the transition slope. The flange sleeve is used to achieve stable installation of the compression spring.

[0009] Furthermore, the unlocking module includes a manual lock ring, a sliding pin and a knob steel ball. The manual lock ring is set on the retaining frame and can slide along the length direction of the operating cavity. The manual lock ring drives the lock sleeve to move through the sliding pin, and the manual lock ring drives the unlocking ring to rotate through the knob steel ball. The manual lock ring drives the lock sleeve to axially move through the sliding pin, and the manual lock ring drives the unlocking ring to rotate through the knob steel ball.

[0010] Furthermore, the manual lock ring is provided with a pin hole for the sliding pin to pass through and a steel ball groove for accommodating the knob steel ball, the inner wall of the unlocking ring is provided with a strip groove for cooperating with the knob steel ball, the retaining frame is provided with a retreat groove for cooperating with the sliding pin, and the outer wall of the lock sleeve is provided with a retreat ring for cooperating with the sliding pin. The strip groove cooperates with the knob steel ball to drive the unlocking ring to rotate, and the retreat groove cooperates with the sliding pin to drive the lock sleeve to retreat.

[0011] Furthermore, an end cap is provided at one end of the operating chamber, the end cap is fixedly connected with the retaining frame, a limiting ring is provided at the other end of the operating chamber, and the manual locking ring moves between the end cap and the limiting ring. The setting of the end cap limits the manual locking ring and the unlocking ring on the retaining frame.

[0012] Furthermore, a mounting groove is provided on the inner wall of the end cover, and a mounting ring matching the mounting groove is provided at the end of the retainer, and the mounting ring is clamped into the mounting groove. The mounting groove and the mounting ring are clamped and fixed to achieve the installation of the end cover.

[0013] Furthermore, a groove ring is provided on the inner wall of the unlocking ring corresponding to the limiting ring, so that a gap is formed between the limiting ring and the groove ring, and an arc-shaped tension spring is provided in the gap, one end of the tension spring is fixedly connected to the retaining frame, and the other end is fixedly connected to the unlocking ring. One end of the tension spring fixed to the retaining frame is stationary, and one end of the tension spring fixed to the unlocking ring will stretch along with the unlocking ring, and the unlocking ring will be reset when the tension spring is restored.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a quick-release chuck for orthopedic tools, which makes unlocking more labor-saving through the cooperation of an unlocking ring and an unlocking module. During the rotation of the tool, the clamping module will not rotate together, thereby reducing the exposed rotating parts as much as possible, protecting the outer tissue from damage during the operation, thereby ensuring the normal operation of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of orthopedic tools;

[0018] Figure 2 It is an external schematic diagram of the quick release chuck;

[0019] Figure 3 yes Figure 2 Schematic diagram after removing the unlocking ring;

[0020] Figure 4 yes Figure 3 Schematic diagram after removing the manual locking ring;

[0021] Figure 5 is a structural schematic diagram of the clamping module;

[0022] Figure 6 yes Figure 5 Schematic diagram of the internal structure;

[0023] Figure 7 This is the first angle internal diagram of the quick release chuck;

[0024] Figure 8 This is a second angle internal diagram of the quick release chuck;

[0025] Fig. 9 This is the first angle exploded view of the quick release chuck;

[0026] Fig.10 This is the second angle exploded view of the quick release chuck;

[0027] In the figure, 1. retaining frame, 11. inner cavity, 12. sliding bearing, 13. operating cavity, 14. withdrawal groove, 15. limiting ring, 16. mounting ring, 2. unlocking ring, 21. strip groove, 22. groove ring, 23. screw hole, 3. shaft sleeve, 31. input section, 32. output section, 33. steel ball hole, 34. flange sleeve, 35. transition slope, 36. clamping hole, 4. locking sleeve, 41. locking knife steel ball, 42. compression spring, 43. unlocking surface, 44. locking surface, 45. limiting protrusion, 46. withdrawal ring, 5. manual locking ring, 51. sliding pin, 52. knob steel ball, 53. pin hole, 54. steel ball groove, 6. end cover, 61. mounting groove, 7. tension spring, 8. main machine. DETAILED DESCRIPTION

[0028] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0029] The traditional orthopedic power tool includes a main unit 8 and a tool. The tool is driven to rotate by the main unit 8. The commonly used tool interface is to push the locking steel ball 41 into the positioning groove on the tool, and push the outer ring sleeve to lock the steel ball through the compression spring 42. When unlocking, the outer ring sleeve is retreated to achieve the function of unlocking the steel ball and taking out the tool. During use, the outer ring sleeve will rotate with the rotation of the tool. Due to the long length of the rotating section, it will affect the rotation accuracy of the tool, and will also affect the surgical operation and wear the normal bone and flesh tissue. In addition, the unlocking method of retreating the outer ring sleeve requires a large unlocking force value, and the force required for unlocking is also large, which will cause great fatigue.

[0030] In order to ensure the normal rotation of the tool, in order to reduce the exposed rotating parts as much as possible, reduce surgical injuries caused by misoperation, and facilitate the replacement of the tool, a quick-release chuck for orthopedic tools is designed, such as Figure 1 and 2 As shown, the quick-release chuck includes a retaining frame 1, a clamping module, an unlocking ring 2 and an unlocking module. The retaining frame 1 is provided with an inner cavity 11. The clamping module is rotatably arranged in the inner cavity 11 through a sliding bearing 12. The clamping module is provided with a clamping hole 36 for accommodating a tool. The unlocking ring 2 is mounted on the outside of the retaining frame 1 to form an operating cavity 13 for accommodating the unlocking module.

[0031] When the tool needs to be inserted into the chuck, the tension spring 7 is stretched by rotating the unlocking collar 2, and the unlocking collar 2 drives the manual locking collar 5 to rotate through the knob steel ball 52. The sliding pin 51 in the manual locking collar 5 will move toward the main machine 8 end along the retreat groove 14 on the retaining frame 1. The sliding pin 51 pushes against the retreat ring 46 during the retreat process to drive the locking sleeve 4 to retreat. The retreat of the locking sleeve 4 makes the knife locking steel ball 41 withdraw from the inner surface of the shaft sleeve 3 and compresses the compression spring 42, so that the tool can be smoothly inserted into the clamping hole 36 of the shaft sleeve 3. When the tool is locked, the unlocking collar 2 is released, and the stretched tension spring 7 will pull the unlocking collar 2 back to the initial state. At the same time, the compressed compression spring 42 will also push the locking sleeve 4 to reset. The knife locking steel ball 41 is locked by the locking sleeve 4, and the knife locking steel ball 41 locks the tool to ensure that the tool will not be pulled out axially, and the tool is locked. The input section 31 of the sleeve 3 is connected to the main machine 8 through a gear box. When the gear box input power rotates, the input section 31 is driven to rotate, and the locking sleeve 4 will also rotate together. Since the sliding bearing 12 separates the clamping module and the retaining frame 1, the retaining frame 1 will not rotate with the transmission part.

[0032] like Figure 5 and 6 As shown, the clamping module includes a sleeve 3, a locking sleeve 4 and a knife-locking steel ball 41. The sleeve 3 has an input section 31 close to the main machine 8 and an output section 32 away from the main machine 8. The diameter of the input section 31 is smaller than the diameter of the output section 32. The output section 32 is circumferentially provided with a plurality of steel ball holes 33. The sleeve 3 slides with the locking sleeve 4 through a compression spring 42, so that the knife-locking steel ball 41 is radially displaced in the steel ball holes 33. The locking sleeve 4 slides with the retaining frame 1 through an unlocking module, and the knife-locking steel ball 41 is placed in the steel ball holes 33. The inner wall of the locking sleeve 4 is provided with an unlocking surface 43 and a locking surface 44 that are matched with the outer wall of the output section 32 in sequence, and the diameter of the unlocking surface 43 is larger than the diameter of the locking surface 44. A transition slope 35 is formed between the input section 31 and the output section 32, and a limiting protrusion 45 that abuts against the transition slope 35 is also provided on the inner wall of the locking sleeve 4.

[0033] In order to fix the compression spring 42, a flange sleeve 34 is provided at the end of the input section 31. The compression spring 42 is sleeved outside the input section 31 and arranged between the limiting protrusion 45 and the flange sleeve 34, so that the limiting protrusion 45 abuts against the transition slope 35. Through the cooperation between the limiting protrusion 45 and the transition slope 35, the locking sleeve 4 can be restored to its original position under the rebound action of the compression spring 42.

[0034] When the lock sleeve 4 retreats, the locking surface 44 on the lock sleeve 4 is at the position of the steel ball hole 33, and the knife-locking steel ball 41 in the steel ball hole 33 is protruding from the inner surface of the sleeve 3 and presses into the positioning groove on the tool, and the tool is locked in the output section 32; the lock sleeve 4 retreats to the position where the unlocking surface 43 is at the steel ball hole 33, and the knife-locking steel ball 41 can fall into the unlocking surface 43, that is, the knife-locking steel ball 41 withdraws from the inner surface of the sleeve 3, and the tool can be inserted and pulled out normally. The compression spring 42 will press the lock sleeve 4 to prevent the knife-locking steel ball 41 from falling off, and the entire clamping module will rotate with the tool during use.

[0035] like Figure 3 and 4 As shown, the unlocking module includes a manual locking ring 5, a sliding pin 51 and a knob steel ball 52. The manual locking ring 5 is sleeved on the retaining frame 1 and can slide along the length direction of the operating cavity 13. The manual locking ring 5 drives the locking sleeve 4 to move through the sliding pin 51, and the manual locking ring 5 drives the unlocking ring 2 to rotate through the knob steel ball 52.

[0036] The manual lock ring 5 is provided with a pin hole 53 for the sliding pin 51 to pass through and a steel ball groove 54 for accommodating the knob steel ball 52. The inner wall of the unlocking ring 2 is provided with a strip groove 21 that cooperates with the knob steel ball 52. The retaining frame 1 is provided with a retreat groove 14 that cooperates with the sliding pin 51. The outer wall of the lock sleeve 4 is provided with a retreat ring 46 that cooperates with the sliding pin 51. The retreat groove 14 provides a retreat limit for the sliding pin 51. By rotating the unlocking ring 2, the sliding pin 51 reaches the required retreat distance according to the set rotation angle. The retreat groove 14 with different angles can be set according to the actual retreat requirements to change the rotation angle of the sliding pin 51, that is, change the retreat distance of the sliding pin 51.

[0037] There are a steel ball groove 54 and a pin hole 53 on the manual lock ring 5. The two grooves are used to fix the corresponding knob steel ball 52 and the sliding pin 51 on the manual lock ring 5. The steel ball groove 54 is used to rotate synchronously with the unlocking ring 2 through the knob steel ball 52; the sliding pin 51 is used to allow the sliding pin 51 to rotate synchronously with the lock sleeve 4. When the sliding pin 51 retreats in the retreat groove 14 of the retaining frame 1, it will also drive the lock sleeve 4 to retreat.

[0038] like Figure 7-10 As shown, in order to limit the manual lock ring 5, an end cover 6 is provided at one end of the operating cavity 13, and the end cover 6 is fixedly engaged with the retaining frame 1, and a limiting ring 15 is provided at the other end of the operating cavity 13, and the manual lock ring 5 moves between the end cover 6 and the limiting ring 15. An installation groove 61 is provided on the inner wall of the end cover 6, and an installation ring 16 matching the installation groove 61 is provided at the end of the retaining frame 1, and the installation ring 16 is inserted into the installation groove 61.

[0039] The inner wall of the unlocking ring 2 is provided with a groove ring 22 corresponding to the limiting ring 15, so that a gap is formed between the limiting ring 15 and the groove ring 22, and an arc-shaped tension spring 7 is provided in the gap, one end of the tension spring 7 is fixedly connected to the retaining frame 1, and the other end is fixedly connected to the unlocking ring 2. In the initial state, the tension spring 7 is fixed to the retaining frame 1 and the unlocking ring 2 by screws, respectively. The retaining frame 1 and the unlocking ring 2 are provided with screw holes 23. The screws on the retaining frame 1 are fixed, and the screws on the unlocking ring 2 will rotate with the ring, pulling the tension spring 7 during the rotation. After the unlocking ring 2 is released, the tension spring 7 recovers and pulls the unlocking ring 2 back to the initial state.

[0040] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A quick-release chuck for an orthopedic tool, the orthopedic tool comprising a main machine (8) and a tool, the tool being connected to the main machine (8) via a quick-release joint, characterized in that: The quick-release chuck comprises a retaining frame (1), a clamping module, an unlocking ring (2) and an unlocking module, wherein the retaining frame (1) is provided with an inner cavity (11), the clamping module is rotatably arranged in the inner cavity (11) via a sliding bearing (12), the clamping module is provided with a clamping hole (36) capable of accommodating a tool, and the unlocking ring (2) is sleeved on the outside of the retaining frame (1) to form an operating cavity (13) capable of accommodating the unlocking module.

2. The quick-release chuck of an orthopedic tool according to claim 1, characterized in that: The clamping module comprises A shaft sleeve (3), the shaft sleeve (3) having an input section (31) close to the main machine (8) and an output section (32) far from the main machine (8), the diameter of the input section (31) being smaller than the diameter of the output section (32), and the output section (32) being provided with a plurality of steel ball holes (33) in the circumferential direction, A locking sleeve (4), and a knife locking steel ball (41), wherein the knife locking steel ball (41) is placed in the steel ball hole (33). The shaft sleeve (3) is slidably matched with the locking sleeve (4) via a compression spring (42), so that the knife locking steel ball (41) is radially displaced in the steel ball hole (33), and the locking sleeve (4) is slidably matched with the retaining frame (1) via an unlocking module.

3. The quick-release chuck of an orthopedic tool according to claim 2, characterized in that: The inner wall of the lock sleeve (4) is provided with an unlocking surface (43) and a locking surface (44) which cooperate with the outer wall of the output section (32) in sequence, and the diameter of the unlocking surface (43) is larger than the diameter of the locking surface (44).

4. The quick-release chuck of an orthopedic tool according to claim 3, characterized in that: A transition slope (35) is formed between the input section (31) and the output section (32), and the inner wall of the locking sleeve (4) is also provided with a limiting protrusion (45) that abuts against the transition slope (35).

5. The quick-release chuck of an orthopedic tool according to claim 4, characterized in that: A flange sleeve (34) is provided at the end of the input section (31), and the compression spring (42) is sleeved outside the input section (31) and arranged between the limiting protrusion (45) and the flange sleeve (34), so that the limiting protrusion (45) abuts against the transition inclined surface (35).

6. The quick-release chuck of an orthopedic tool according to claim 2, characterized in that: The unlocking module comprises a manual locking ring (5), a sliding pin (51) and a knob steel ball (52); the manual locking ring (5) is sleeved on the retaining frame (1) and can slide along the length direction of the operating cavity (13); the manual locking ring (5) drives the locking sleeve (4) to move through the sliding pin (51); and the manual locking ring (5) drives the unlocking ring (2) to rotate through the knob steel ball (52).

7. The quick-release chuck of an orthopedic tool according to claim 6, characterized in that: The manual lock ring (5) is provided with a pin hole (53) for a sliding pin (51) to pass through and a steel ball groove (54) for accommodating a knob steel ball (52); the inner wall of the unlocking ring (2) is provided with a strip groove (21) cooperating with the knob steel ball (52); the retaining frame (1) is provided with a retreat groove (14) cooperating with the sliding pin (51); and the outer wall of the lock sleeve (4) is provided with a retreat ring (46) cooperating with the sliding pin (51).

8. The quick-release chuck of an orthopedic tool according to claim 6, characterized in that: An end cover (6) is provided at one end of the operating chamber (13), and the end cover (6) is fixedly connected to the retaining frame (1). A limiting ring (15) is provided at the other end of the operating chamber (13), and the manual locking ring (5) moves between the end cover (6) and the limiting ring (15).

9. The quick-release chuck of an orthopedic tool according to claim 8, characterized in that: The inner wall of the end cover (6) is provided with a mounting groove (61), and the end of the retaining frame (1) is provided with a mounting ring (16) that matches the mounting groove (61), and the mounting ring (16) is snapped into the mounting groove (61).

10. The quick-release chuck of an orthopedic tool according to claim 8, characterized in that: The inner wall of the unlocking ring (2) is provided with a groove ring (22) corresponding to the limiting ring (15), so that a gap is formed between the limiting ring (15) and the groove ring (22), and an arc-shaped tension spring (7) is provided in the gap, one end of the tension spring (7) is fixedly connected to the retaining frame (1), and the other end is fixedly connected to the unlocking ring (2).

Images