Bone-taking girdling drill

Abstract

The utility model discloses a bone taking girdling drill which comprises a drill handle and a hollow tubular drill bit, a connecting seat is arranged at one end of the drill handle, external threads are arranged on the peripheral side of the connecting seat, a connecting sleeve is arranged at one end of the drill bit, internal threads corresponding to the external threads are arranged on the inner side of the connecting sleeve, and the connecting sleeve is connected with the drill bit. The drill bit and the drill handle are detachably connected through matching of the external threads and the internal threads, cutting sawteeth annularly distributed around the axis of the drill bit are arranged at the end, away from the connecting sleeve, of the drill bit, a plurality of grooves extending in the inclined direction are formed in the peripheral side surface of the drill bit, and the grooves extend to the outer sides of the cutting sawteeth. Due to the fact that the grooves extending to the outer sides of the cutting sawteeth are formed in the peripheral side of the drill bit, cutting fluid can be guided through the grooves, the cutting fluid can smoothly flow into the cutting sawteeth to cool and lubricate the cutting sawteeth, and cutting edge abrasion and notch damage are avoided.

Description

Technical Field

[0001] The utility model relates to a dental implant medical device, in particular to a bone-taking ring-cutting drill. Background Art

[0002] The bone extraction circumcision drill is a circumcision tool used in the dental implant process. It has a simple structure and is easy to operate. Its appearance can facilitate people's use. The bone extraction circumcision drill includes a drill handle and a hollow tubular drill bit. The drill bit and the drill handle are detachably connected. Drill bits or drill handles of different specifications and models can be selected according to needs to further better control the cutting depth and flatness. The drill bit of the existing bone extraction circumcision drill has a smooth surface on the side of the drill bit. During use, the side of the drill bit is easy to fit tightly with the side wall of the hole, resulting in the cutting fluid being unable to reach the cutting edge of the drill bit, resulting in cutting edge wear and incision damage. Utility Model Content

[0003] The utility model aims at the defects of the prior art and provides a bone-taking trepanning drill, which can ensure that the cutting fluid can reach the cutting edge during operation, thereby avoiding cutting edge wear and incision damage.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A bone cutting drill comprises a drill shank and a hollow tubular drill bit, one end of the drill shank is provided with a connection seat, the peripheral side of the connection seat is provided with an external thread, one end of the drill bit is provided with a connection sleeve, the inner side of the connection sleeve is provided with an internal thread corresponding to the external thread, the drill bit and the drill shank are detachably connected through the cooperation of the external thread and the internal thread, the end of the drill bit away from the connection sleeve is provided with cutting teeth distributed in an annular manner around the axis of the drill bit, and the peripheral surface of the drill bit is provided with a plurality of grooves extending obliquely, and the grooves extend to the outside of the cutting teeth. By providing the grooves extending to the outside of the cutting teeth on the peripheral side of the drill bit, the cutting fluid can be guided through the grooves, so that the cutting fluid can flow smoothly into the cutting teeth, cool down and lubricate the cutting teeth, and avoid edge wear and incision damage.

[0006] As a preferred technical solution, the groove extends obliquely in a spiral shape on the circumference of the drill bit.

[0007] As a preferred technical solution, the grooves are evenly distributed on the peripheral surface of the drill bit.

[0008] As a preferred technical solution, the extending direction of the groove is opposite to the rotation direction of the drill bit when it is working.

[0009] As a preferred technical solution, the arc of each groove extending along the circumference of the drill bit is 45° to 60°.

[0010] As a preferred technical solution, the groove is arc-shaped and recessed on the peripheral surface of the drill bit, and the depth of the groove is 0.15 to 0.50 mm.

[0011] As a preferred technical solution, the outer diameter of the connecting sleeve is larger than the outer diameter of the drill bit, and the drill bit is integrally connected to the connecting sleeve.

[0012] As a preferred technical solution, a chisel blade is provided at the central position of one end of the drill bit provided with the cutting sawtooth, a first chamfered surface and a second chamfered surface are provided at the upper end of the chisel blade, and a ridge is formed at the intersection of the first chamfered surface and the second chamfered surface. By providing the chisel blade, the bone or biological tissue inside the cutting sawtooth can be cut by the chisel blade to ensure that bone chips can be cleaned up.

[0013] As a preferred technical solution, a stop ring protruding radially outward is provided at one end of the connecting seat close to the drill shank.

[0014] As a preferred technical solution, a gasket is further sleeved on the outside of the connecting seat. During assembly, the gasket is clamped between the lower end surface of the connecting sleeve and the stop ring.

[0015] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, by arranging a groove extending to the outside of the cutting teeth on the peripheral side of the drill bit, the cutting fluid can be guided through the groove, so that the cutting fluid can smoothly flow into the cutting teeth, cool down and lubricate the cutting teeth, and avoid edge wear and incision damage.

[0016] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an assembly structure diagram of an embodiment of the utility model;

[0018] Figure 2 It is an exploded structural diagram of an embodiment of the utility model;

[0019] Figure 3 yes Figure 1 A magnified schematic diagram of center A.

[0020] Description of the accompanying drawings:

[0021] 10. Drill handle 11. Connecting seat 12. External thread

[0022] 13. Stop ring 20, drill bit 21, connecting sleeve

[0023] 22. Internal thread 23. Cutting teeth 24. Groove

[0024] 25, chisel edge 26, first chamfered surface 27, second chamfered surface

[0025] 28. Blade ridge 30. Washer. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] like Figure 1-3 As shown, a bone cutting drill of the utility model comprises a drill shank 10 and a hollow tubular drill bit 20, wherein a connecting seat 11 is provided at one end of the drill shank 10, and an external thread 12 is provided on the circumferential side of the connecting seat 11, and a connecting sleeve 21 is provided at one end of the drill bit 20, and an internal thread 22 corresponding to the external thread 12 is provided on the inner side of the connecting sleeve 21, and the drill bit 20 and the drill shank 10 are detachably connected through the cooperation of the external thread 12 and the internal thread 22, and the end of the drill bit 20 away from the connecting sleeve 21 is provided with cutting teeth 23 distributed in an annular manner around the axis of the drill bit 20, and a plurality of obliquely extending grooves 24 are provided on the circumferential surface of the drill bit 20, and the grooves 24 extend to the outside of the cutting teeth 23. By setting a groove 24 extending to the outside of the cutting teeth 23 on the peripheral side of the drill bit 20, the cutting fluid can be guided through the groove 24 so that the cutting fluid can smoothly flow into the cutting teeth 23, cool down and lubricate the cutting teeth 23, and avoid edge wear and incision damage.

[0029] In the utility model, the groove 24 extends obliquely in a spiral shape on the circumferential side of the drill bit 20, and the groove 24 is evenly distributed on the circumferential surface of the drill bit 20. The extension direction of the groove 24 is opposite to the rotation direction of the drill bit 20 when working. The arc of each groove 24 extending along the circumference of the drill bit 20 is 45°~60°. The groove 24 is arc-shaped and concave on the circumferential surface of the drill bit 20. The depth of the groove 24 is 0.15~0.50mm, preferably 0.2~0.3mm.

[0030] Specifically, the outer diameter of the connecting sleeve 21 is larger than the outer diameter of the drill bit 20, and the drill bit 20 is integrally connected with the connecting sleeve 21. The end of the connecting seat 11 close to the drill handle 10 is provided with a stop ring 13 protruding radially outward. A chisel edge 25 is provided at the central position of one end of the drill bit 20 provided with the cutting saw teeth 23, and a first chamfered surface 26 and a second chamfered surface 27 are provided at the upper end of the chisel edge 25. A ridge 28 is formed at the intersection of the first chamfered surface 26 and the second chamfered surface 27. By providing the chisel edge 25, the bone or biological tissue inside the cutting saw teeth 23 can be cut by the chisel edge 25, ensuring that the bone chips can be cleaned up.

[0031] In the present invention, a washer 30 is sleeved on the outside of the connecting seat 11 . During assembly, the washer 30 is clamped between the lower end surface of the connecting sleeve 21 and the stop ring 13 .

[0032] In summary, the utility model provides a groove extending to the outside of the cutting teeth on the circumference of the drill bit, so that the cutting fluid can be guided through the groove, so that the cutting fluid can smoothly flow into the cutting teeth, cool down and lubricate the cutting teeth, and avoid edge wear and incision damage.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical practice of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A bone cutting drill, characterized in that: The drill bit comprises a drill shank and a hollow tubular drill bit, wherein a connecting seat is provided at one end of the drill shank, an external thread is provided on the circumferential side of the connecting seat, a connecting sleeve is provided at one end of the drill bit, an internal thread corresponding to the external thread is provided on the inner side of the connecting sleeve, the drill bit and the drill shank are detachably connected through the cooperation of the external thread and the internal thread, the end of the drill bit away from the connecting sleeve is provided with cutting teeth distributed in an annular manner around the axis of the drill bit, a plurality of obliquely extending grooves are provided on the circumferential surface of the drill bit, and the grooves extend to the outer sides of the cutting teeth.

2. A bone cutting drill according to claim 1, characterized in that: The groove extends obliquely in a spiral shape on the circumference of the drill bit.

3. A bone cutting drill according to claim 1, characterized in that: The grooves are evenly distributed on the peripheral surface of the drill bit.

4. The bone cutting drill according to claim 1, characterized in that: The extending direction of the groove is opposite to the rotation direction of the drill bit when it is working.

5. The bone cutting drill according to claim 1, characterized in that: The arc angle of each groove extending along the circumference of the drill bit is 45° to 60°.

6. The bone cutting drill according to claim 1, characterized in that: The groove is arc-shaped and is concavely arranged on the peripheral side surface of the drill bit. The depth of the groove is 0.15-0.50 mm.

7. The bone cutting drill according to claim 1, characterized in that: The outer diameter of the connecting sleeve is greater than the outer diameter of the drill bit, and the drill bit is integrally formed and connected with the connecting sleeve.

8. The bone cutting drill according to claim 1, characterized in that: A chisel edge is provided at the central position of one end of the drill bit provided with cutting teeth, a first chamfered surface and a second chamfered surface are provided at the upper end of the chisel edge, and a ridge is formed at the intersection of the first chamfered surface and the second chamfered surface.

9. The bone cutting drill according to claim 1, characterized in that: A stop ring protruding radially outwards is provided at one end of the connecting seat close to the drill handle.

10. The bone cutting drill according to claim 9, characterized in that: A gasket is also sleeved on the outside of the connecting seat. During assembly, the gasket is clamped between the lower end surface of the connecting sleeve and the stop ring.

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