A special conical drill bit for orthopedics

Abstract

This utility model discloses a tapered drill bit for orthopedics, comprising a tapered drill bit body, a connecting rod on the tapered drill bit body, an extension rod on the connecting rod, a clamping plate on the extension rod, and a clamping sleeve on the connecting rod. A clamping ring is fitted onto the outer wall of the clamping sleeve, and the clamping ring moves axially toward the clamping sleeve along the connecting rod, causing the clamping sleeve to contract inward and lock onto the outer wall of the extension rod. The beneficial effects of this utility model are: by releasing the radial constraint of the clamping ring on the clamping sleeve, the locking state between the extension rod and the connecting rod is released, thereby allowing the original extension rod to be axially pulled away. When it is necessary to adjust the length of the extension rod according to the depth of bone tissue, an extension rod of suitable length can be replaced, so as to achieve rapid and compatible replacement of extension rods of different specifications.

Description

Technical Field

[0001] This utility model relates to a conical drill bit specifically designed for orthopedics. Background Technology

[0002] In orthopedic surgery, tapered drill bits are key tools for drilling into bone tissue, and their performance directly affects surgical precision and efficiency.

[0003] Traditional orthopedic drills are typically designed with a fixed length, which cannot be flexibly adjusted according to the depth of the patient's bone tissue. This leads to the risk of insufficient drilling depth or excessive penetration during surgery. In view of this, this utility model proposes a tapered drill specifically for orthopedics to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a tapered drill bit specifically for orthopedics to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A tapered drill bit for orthopedics includes a tapered drill bit body, on which a connecting rod is provided;

[0007] An extension rod is provided on the connecting rod, a clamping plate is provided on the extension rod, and a clamping sleeve is also provided on the connecting rod. A clamping ring is fitted on the outer wall of the clamping sleeve. The clamping ring moves along the axial direction of the connecting rod toward the clamping sleeve, so that the clamping sleeve contracts inward and locks itself onto the outer wall of the extension rod.

[0008] As an improvement to the above technical solution, a limiting groove is provided on the connecting rod, and a limiting rod is provided on the extended rod, wherein the limiting rod is adapted to the limiting groove;

[0009] The cross-sections of both the limiting groove and the limiting rod are polygonal.

[0010] As an improvement to the above technical solution, the clamping sleeve includes multiple sets of elastic arc plates, which are arranged in a ring array on the connecting rod.

[0011] All of the aforementioned elastic arc-shaped plates are arranged inside the clamping ring.

[0012] As an improvement to the above technical solution, a deformation groove is provided between the two sets of elastic arc plates;

[0013] The wall thickness of the elastic arc plate gradually increases from the connecting rod to the extension rod. The elastic arc plate is provided with a guide slope, which contacts the inner wall of the clamping ring.

[0014] As an improvement to the above technical solution, the clamping ring is provided with a positioning through hole, and the connecting rod is provided with a connecting through hole;

[0015] The positioning through hole and the connecting through hole are matched in position, and a positioning bolt with threaded connection is provided between the positioning through hole and the connecting through hole.

[0016] As an improvement to the above technical solution, a limiting through hole is provided on the limiting rod, and the limiting through hole is matched in position and size with the connecting through hole;

[0017] The positioning bolt is threaded into the limiting through hole.

[0018] As an improvement to the above technical solution, two sets of positioning through holes and two sets of connecting through holes are provided, and the two sets of positioning through holes and the two sets of connecting through holes are symmetrically arranged.

[0019] As an improvement to the above technical solution, a placement groove is provided at the positioning through hole;

[0020] The positioning bolt is provided with a placement block, which is adapted to the placement groove, and the placement block is provided with an internal hexagonal hole.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By releasing the radial constraint of the clamping ring on the clamping sleeve, the locking state of the extension rod and the connecting rod is released, and the original extension rod can be axially pulled away. When it is necessary to adjust the length of the extension rod according to the depth of bone tissue, an extension rod of appropriate length can be replaced to achieve quick and compatible replacement of extension rods of different specifications.

[0023] The radial contraction force is generated by the axial relative displacement between the clamping sleeve and the clamping ring, forming a multi-point contact locking structure. The axial displacement is converted into radial clamping force, thus constructing a composite locking mechanism with enhanced radial torsional stiffness and axial tensile strength. This significantly improves the radial torsional stiffness and axial tensile strength of the connection structure and effectively prevents the connection from loosening during surgery. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This utility model Figure 1 A schematic diagram of the three-dimensional structure;

[0026] Figure 3 This is a schematic diagram of the connecting rod of this utility model;

[0027] Figure 4 This is a side view of the connecting rod of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the extension rod of this utility model;

[0029] Figure 6 This is a schematic diagram of the clamping ring of this utility model;

[0030] Figure 7 This is a schematic diagram of the positioning bolt of this utility model.

[0031] In the diagram: 10. Drill bit body; 11. Connecting rod; 12. Connecting through hole; 13. Limiting groove; 20. Clamping ring; 21. Placement groove; 22. Positioning through hole; 30. Clamping sleeve; 31. Deformation groove; 32. Elastic arc plate; 33. Guide slope; 40. Extension rod; 41. Clamping plate; 42. Limiting rod; 43. Limiting through hole; 50. Positioning bolt; 51. Placement block; 52. Internal hexagonal hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example:

[0034] like Figure 1-7 As shown, this embodiment proposes a conical drill bit for orthopedics, including a conical drill bit body 10, on which a connecting rod 11 is provided;

[0035] An extension rod 40 is provided on the connecting rod 11, a clamping plate 41 is provided on the extension rod 40, and a clamping sleeve 30 is also provided on the connecting rod 11. A clamping ring 20 is sleeved on the outer wall of the clamping sleeve 30. The clamping ring 20 moves along the axial direction of the connecting rod 11 toward the clamping sleeve 30, so that the clamping sleeve 30 retracts inward and locks itself onto the outer wall of the extension rod 40.

[0036] In this case, the clamping plate 41 on the extension rod 40 is connected to the drill bit clamp of the drilling rig, thereby driving the extension rod 40 to rotate through the drilling rig;

[0037] In this embodiment, when the tapered drill bit body 10 and the extension rod 40 are modularly assembled, the extension rod 40 is placed in the clamping sleeve 30 and the extension rod 40 is coaxially arranged with the connecting rod 11. Then, the clamping ring 20 is displaced toward the clamping sleeve 30, so that the clamping sleeve 30 retracts inward and locks itself on the outer wall of the extension rod 40, thereby connecting the extension rod 40 and the connecting rod 11 together to complete the assembly process.

[0038] By releasing the radial constraint of the clamping ring 20 on the clamping sleeve 30, the locking state of the extension rod 40 and the connecting rod 11 is released, so that the original extension rod 40 can be axially pulled away. When it is necessary to adjust the length of the extension rod 40 according to the depth of bone tissue, an extension rod 40 of appropriate length can be replaced to achieve quick and compatible replacement of extension rods 40 of different specifications.

[0039] The radial contraction force is generated by the axial relative displacement between the clamping sleeve 30 and the clamping ring 20, forming a multi-point contact locking structure. The axial displacement is converted into radial clamping force, thus constructing a composite locking mechanism with enhanced radial torsional stiffness and axial tensile strength. This significantly improves the radial torsional stiffness and axial tensile strength of the connection structure and effectively prevents the connection from loosening during surgery.

[0040] Specifically, a limiting groove 13 is provided on the connecting rod 11, and a limiting rod 42 is provided on the extension rod 40, the limiting rod 42 being adapted to the limiting groove 13;

[0041] The cross-sections of the limiting groove 13 and the limiting rod 42 are both polygonal.

[0042] In this embodiment, the torque transmission path between the connecting rod 11 and the extension rod 40 is upgraded from a single friction surface of a traditional circular cross section to a multi-sided collaborative bearing by utilizing the multi-plane contact characteristics of the polygonal cross section. This significantly improves torsional stiffness and avoids the risk of slippage when drilling in high bone density areas such as cortical bone.

[0043] Specifically, the clamping sleeve 30 includes multiple sets of elastic arc plates 32, which are arranged in a ring array on the connecting rod 11;

[0044] Multiple sets of the elastic arc-shaped plates 32 are all arranged inside the clamping ring 20.

[0045] Specifically, a deformation groove 31 is provided between the two sets of elastic arc plates 32;

[0046] The wall thickness of the elastic arc plate 32 gradually increases from the connecting rod 11 to the extension rod 40. The elastic arc plate 32 is provided with a guide slope 33, which contacts the inner wall of the clamping ring 20.

[0047] In this embodiment, when the extension rod 40 is modularly assembled, the limiting rod 42 is inserted into the limiting groove 13, and the extension rod 40 contacts the connecting rod 11. Then, the clamping ring 20 moves towards the extension rod 40 on the outer wall of the connecting rod 11. Under the contact between the inner wall of the clamping ring 20 and the guide slope 33, multiple sets of elastic arc plates 32 contract towards the axis of the connecting rod 11, so that multiple sets of elastic arc plates 32 are clamped and wrapped around the outer wall of the extension rod 40.

[0048] Through the coordinated design of multiple sets of annular arrayed elastic arc plates 32 and deformation grooves 31 in the clamping sleeve 30, combined with the gradient structure of the elastic arc plate 32 wall thickness gradually changing from the connecting rod 11 to the extension rod 40 and the guiding effect of the guiding slope 33, multiple sets of elastic arc plates 32 are driven to elastically contract towards the axis when the clamping ring 20 is axially displaced. The deformation grooves 31 provide space for plate deformation, and the gradual wall thickness design effectively disperses the contraction stress, avoiding plastic deformation caused by stress concentration, and achieving uniform and stable multi-point contact clamping. This structure converts axial displacement into radial clamping force, forming a composite locking mechanism, which significantly improves the connection The radial torsional stiffness and axial tensile strength between the connecting rod 11 and the extension rod 40 prevent the connection from loosening during drilling in high bone density areas. Simultaneously, the multi-plane synergistic bearing characteristics of the polygonal cross-section limiting groove 13 and the limiting rod 42 optimize the torque transmission path, further enhancing torsional performance and ensuring the stability of drilling power transmission. Its elastic clamping mechanism supports rapid intraoperative assembly and compatible replacement of the extension rod 40 length, meeting the flexible adjustment needs for different bone tissue depths. This fundamentally solves the technical defects of traditional orthopedic drill bit connection structures, such as easy loosening and insufficient torsional stiffness, demonstrating significant clinical practicality and operational safety.

[0049] Specifically, the clamping ring 20 is provided with a positioning through hole 22, and the connecting rod 11 is provided with a connecting through hole 12;

[0050] The positioning through hole 22 and the connecting through hole 12 are matched in position, and a positioning bolt 50 with threaded connection is provided between the positioning through hole 22 and the connecting through hole 12.

[0051] Specifically, the limiting rod 42 has a limiting through hole 43, and the limiting through hole 43 is matched in position and size with the connecting through hole 12;

[0052] The positioning bolt 50 is threaded into the limiting through hole 43.

[0053] In this embodiment, when the limiting rod 42 is placed in the limiting groove 13, the limiting through hole 43, the connecting through hole 12 and the positioning through hole 22 are matched, and then the positioning bolt 50 is connected between the limiting through hole 43, the connecting through hole 12 and the positioning through hole 22.

[0054] By using the threaded connection structure of the positioning bolt 50 through the positioning through hole 22 and the connecting through hole 12, a multi-stage mechanical locking is constructed. The thread preload eliminates the connection gap, ensures the coaxiality of the extension rod 40 and the connecting rod 11, improves the shear load resistance, and prevents the connection from loosening or failing due to eccentric load during drilling.

[0055] Specifically, the positioning through holes 22 and the connecting through holes 12 are provided in two sets, and the two sets of positioning through holes 22 are symmetrically arranged, and the two sets of connecting through holes 12 are symmetrically arranged.

[0056] In this embodiment, a symmetrical force transmission path is formed by two sets of symmetrically arranged positioning through holes 22 and connecting through holes 12, which evenly distributes the dynamic torque and axial tension during the drilling process, avoids local deformation or fracture caused by stress concentration on one side, and improves the reliability and durability of the overall structure.

[0057] Specifically, a placement groove 21 is provided at the positioning through hole 22;

[0058] The positioning bolt 50 is provided with a placement block 51, which is adapted to the placement groove 21, and the placement block 51 is provided with an internal hexagonal hole 52.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bone surgery specific taper drill bit characterized by: It includes a tapered drill bit body (10), on which a connecting rod (11) is provided; An extension rod (40) is provided on the connecting rod (11), a clamping plate (41) is provided on the extension rod (40), and a clamping sleeve (30) is also provided on the connecting rod (11). A clamping ring (20) is sleeved on the outer wall of the clamping sleeve (30). The clamping ring (20) moves along the axial direction of the connecting rod (11) toward the clamping sleeve (30), so that the clamping sleeve (30) retracts inward and locks itself on the outer wall of the extension rod (40).

2. The bone surgery specific conical drill bit of claim 1, wherein: A limiting groove (13) is provided on the connecting rod (11), and a limiting rod (42) is provided on the extension rod (40). The limiting rod (42) is adapted to the limiting groove (13). The cross-sections of the limiting groove (13) and the limiting rod (42) are both polygonal.

3. The conical drill bit as claimed in claim 1, wherein: The clamping sleeve (30) includes multiple sets of elastic arc plates (32), which are arranged in a ring array on the connecting rod (11); Multiple sets of the elastic arc plates (32) are all arranged inside the clamping ring (20).

4. The bone surgery specific tapered drill bit of claim 3, wherein: A deformation groove (31) is provided between the two sets of elastic arc plates (32); The wall thickness of the elastic arc plate (32) gradually increases from the connecting rod (11) to the extension rod (40). The elastic arc plate (32) is provided with a guide slope (33), which contacts the inner wall of the clamping ring (20).

5. The bone surgery specific conical drill bit of claim 2, wherein: The clamping ring (20) has a positioning through hole (22), and the connecting rod (11) has a connecting through hole (12). The positioning through hole (22) and the connecting through hole (12) are matched in position, and a positioning bolt (50) with threaded connection is provided between the positioning through hole (22) and the connecting through hole (12).

6. A tapered drill bit for orthopedics as described in claim 5, characterized in that: The limiting rod (42) has a limiting through hole (43), and the limiting through hole (43) matches the position and size of the connecting through hole (12); The positioning bolt (50) is threaded into the limiting through hole (43).

7. The bone surgery specific tapered drill bit of claim 6, wherein: The positioning through hole (22) and the connecting through hole (12) are provided in two sets, and the two sets of positioning through holes (22) are symmetrically arranged, and the two sets of connecting through holes (12) are symmetrically arranged.

8. The bone surgery specific tapered drill bit of claim 5, wherein: A placement groove (21) is provided at the positioning through hole (22); The positioning bolt (50) is provided with a placement block (51), which is adapted to the placement groove (21), and the placement block (51) is provided with an internal hexagonal hole (52).

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