CN219323463U - Support piece for grinding outer cutter tube of drill bit and grinding drill for operation - Google Patents
Support piece for grinding outer cutter tube of drill bit and grinding drill for operation Download PDFInfo
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- CN219323463U CN219323463U CN202320092640.4U CN202320092640U CN219323463U CN 219323463 U CN219323463 U CN 219323463U CN 202320092640 U CN202320092640 U CN 202320092640U CN 219323463 U CN219323463 U CN 219323463U
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- outer cutter
- support
- cutter tube
- grinding
- drill
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Abstract
The utility model provides a support piece for grinding an outer cutter tube of a drill bit and a grinding drill for operation, and belongs to the field of medical instruments. The support comprises: the avoidance part is provided with a head end and a tail end, a connecting part is used for being connected with the outer cutter pipe, is arranged on the tail end of the avoidance part, and is used for supporting the through hole, and the rod part of the drill bit body penetrates through the avoidance part and the connecting part along the connecting line direction of the head end and the tail end; in the opening direction of the supporting through hole, the radial size of the avoiding part is gradually reduced from the tail end to the head end. The support piece is provided with the support via hole, and when the drill bit body wears to establish in the support via hole, the support piece can support the drill bit body. The avoidance portion can reduce interference of the external contour of the avoidance portion on the visual field of the endoscope device. Meanwhile, the avoiding part is arranged in the supporting piece, the wall thickness of the outer cutter tube is not required to be increased to set the avoiding structure, and the wall thickness of the outer cutter tube and the overall weight of the grinding and drilling tool are reduced.
Description
Technical Field
The utility model belongs to the field of medical instruments, and particularly relates to a support piece for an outer cutter tube of a grinding bit and a grinding bit for operation.
Background
In medical surgery, a grinding tool is generally used to grind bone tissue in vivo, for example, to grind bone tissue lesions in minimally invasive otology surgery, skull base surgery, spinal surgery, and the like. Conventional abrasive drilling tools include abrasive drilling handles and abrasive drill bits. The grinding bit generally comprises an outer cutter tube assembly and a bit body, wherein the rod part of the bit body is sleeved in the outer cutter tube assembly, and the outer cutter tube assembly supports and constrains the bit body in the radial direction. The grinding part of the drill bit body penetrates through the outer cutter tube assembly so as to perform grinding operation.
When performing an operation in a region where the space of the spine, the cervical vertebra, or the like is relatively narrow, a drill is often used in combination with an endoscope apparatus such as an intervertebral foramoscope, an arthroscope, or the like, the endoscope provides an operation field of view, and the drill is used for grinding. Because the outer cutter tube assembly is required to provide radial support to the bit body, its outer diameter is typically large. The outer channel tube assembly is used for reducing the interference to the visual field of the endoscope equipment, and an avoidance structure such as an inclined plane, a step and the like is usually arranged on the outer wall of one end, close to the grinding part of the drill bit body, of the outer channel tube assembly. The traditional outer cutter pipe assembly has a thinner pipe wall, and is difficult to set an avoidance structure. Therefore, the current outer cutter tube assembly generally adopts a mode of increasing the wall thickness to meet the setting space of the avoidance structure, and the support strength requirement for the drill bit body is met after the avoidance structure is arranged at one end of the outer cutter tube assembly, which is close to the grinding part of the drill bit body. However, after the wall thickness of the outer cutter tube assembly is increased, the weight of the outer cutter tube assembly is increased, which is not beneficial to the light weight of the surgical instrument and also increases the operation difficulty of medical staff.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a support for an outer cutter tube of a drill bit and a drill for surgery, which are used for solving the problems of the prior art that the outer cutter tube assembly needs to be increased in wall thickness.
To achieve the above and other related objects, the present utility model provides a support for an outer cutter tube of a drill bit, the support comprising:
an avoiding part having a head end and a tail end,
a connecting part for connecting with the outer cutter tube and arranged at the tail end of the avoiding part, and
the supporting through hole is used for enabling the rod part of the drill bit body to pass through, and is arranged along the axial direction of the avoiding part and the connecting part and penetrates through the avoiding part and the connecting part;
the outer diameter of the head end of the avoiding part is smaller than that of the outer cutter tube.
Optionally, the outside diameter of the relief head end decreases progressively from the tail end toward the head end.
Optionally, the avoiding portion includes a first step near the head end and a second step near the tail end, and an outer diameter of the first step is smaller than an outer diameter of the second step.
Optionally, a transition area is formed between the first step and the second step, and the first step and the second step are connected through the transition area in a smooth transition manner.
Optionally, the avoiding portion is in a shape of a truncated cone, and an outer diameter of the head end is smaller than an outer diameter of the tail end.
Optionally, the connecting portion is straight tube-shape and follows the direction of seting up of supporting the via hole, the connecting portion is kept away from the outer fringe of the terminal surface of the one end of dodging portion tail end is the fillet.
Optionally, the connecting portion is connected to an end face of the tail end, and a radial dimension of the tail end is greater than a radial dimension of the connecting portion.
Optionally, the support member further includes a sheath, the sheath is disposed on the avoidance portion, a grinding position for grinding the grinding portion of the drill bit body is in front of the head end of the avoidance portion, and the sheath at least partially surrounds the grinding position in a lateral direction of the avoidance portion.
The utility model also provides a surgical abrasive drill, which comprises a drill body, an outer cutter pipe and any one of the supporting pieces, wherein the supporting piece is connected to one end of the outer cutter pipe, the rod part of the drill body is arranged in the supporting piece and the outer cutter pipe in a penetrating way, and the grinding part of the drill body is at least partially exposed out of the head end of the supporting piece.
Optionally, a support tube is disposed in the outer cutter tube, and the support tube is sleeved on the shaft portion of the drill bit body and supports the drill bit body in the radial direction of the drill bit body.
As described above, the support piece for the outer cutter tube of the grinding bit and the grinding bit for operation have the following beneficial effects: the support piece is provided with the support via hole, and when the drill bit body wears to establish in the support via hole, the support piece can support the drill bit body. Because the outer diameter of the head end of the avoiding part is smaller than that of the outer cutter pipe, after the supporting piece is connected to the outer cutter pipe, the avoiding part can reduce the interference of the outer contour of the avoiding part to the visual field of the endoscope equipment. The avoiding part is arranged in the supporting piece, the wall thickness of the outer cutter tube is not required to be increased to form an avoiding structure, and the wall thickness of the outer cutter tube and the overall weight of the grinding and drilling tool are reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a support member according to an embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view of a support member according to an embodiment of the present utility model;
FIG. 3 is a schematic cross-sectional view of a support member according to an embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of a support member and an outer cutter tube according to an embodiment of the present utility model;
FIG. 5 is a schematic cross-sectional view of a grinding bit according to an embodiment of the utility model;
FIG. 6 is a schematic view of a partial enlarged structure of a supporting member according to an embodiment of the present utility model;
FIG. 7 is a schematic view of a partial enlarged structure of a supporting member according to an embodiment of the present utility model;
FIG. 8 is a schematic cross-sectional view of FIG. 4;
fig. 9 is a schematic cross-sectional structure of fig. 5.
Reference numerals illustrate:
the tool comprises a support 1, an outer cutter tube 2, a drill bit body 3, a support tube 4, a support body 5, a relief portion 11, a connecting portion 12, a first step 13, a second step 14, a support via hole 15, a sheath 16, a grinding portion 31 and a rod portion 32.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Please refer to fig. 1 to 3. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
Referring to fig. 1 to 9, the present embodiment provides a support member 1 for an outer cutter tube 2 of a grinding bit, wherein the support member 1 includes an avoidance portion 11 and a connection portion 12, the avoidance portion 11 has a head end and a tail end, the connection portion 12 is used for connecting with the outer cutter tube 2, and is disposed on the tail end of the avoidance portion 11. The support 1 further includes a support via hole 15 through which the shaft portion 32 of the bit body 3 passes, and the support via hole 15 is provided along the axial direction of the relief portion 11 and the connection portion 12 and penetrates the relief portion 11 and the connection portion 12. Wherein, the outer diameter of the head end of the avoiding part 11 is smaller than the outer diameter of the outer cutter tube 2.
The support 1 is provided with a support via 15, and the support 1 is capable of supporting the bit body 3 when the bit body 3 is threaded in the support via 15. Since the outer diameter of the head end of the relief portion 11 is smaller than the outer diameter of the outer cutter tube 2, the relief portion 11 can reduce interference of the outer contour thereof with the view of the endoscope apparatus when the support member 1 is attached to the outer cutter tube 2. The avoiding part 11 is arranged in the supporting piece 1, and an avoiding structure is arranged without increasing the wall thickness of the outer cutter tube 2, so that the wall thickness of the outer cutter tube 2 and the overall weight of the grinding and drilling tool are reduced. In the present embodiment, the outer contour of the relief portion 11 is smooth and continuous in the opening direction of the support via hole 15. The outer contour of the avoidance portion 11 is smooth and continuous, so that the internal stress of the outer surface of the avoidance portion 11 can be reduced, and the strength of the support member 1 can be improved. Meanwhile, in some cases, the support piece 1 can enter a human body and possibly contact with human tissues, and the possibility of injury to the human body caused by the support piece 1 can be reduced due to the smooth continuous outer contour, so that the safety of the grinding tool is improved. In some embodiments, the outside diameter of the relief 11 decreases gradually from the trailing end toward the leading end in the opening direction of the support via 15. Specifically, as shown in fig. 2, the avoiding portion 11 may have a truncated cone shape, and an outer diameter of the head end is smaller than an outer diameter of the tail end. The truncated cone-shaped avoiding part 11 has a simple structure and is easy to process.
As shown in fig. 1 and 6, in the present embodiment, the relief portion 11 includes a first step 13 near the head end and a second step 14 near the tail end, and the outer diameter of the first step 13 is smaller than the outer diameter of the second step 14. Under the condition that the avoidance angles are the same, compared with the round table shape, the material of the avoidance part 11 adopting the first step 13 and the second step 14 can be less, and the weight of the support piece 1 is more beneficial to reduction.
Specifically, in this embodiment, a transition region is formed between the first step 13 and the second step 14, and the first step 13 and the second step 14 are connected through a smooth transition region.
As shown in fig. 8 and 9, in some embodiments, the connection portion 12 is in a straight cylindrical shape and is disposed along the opening direction of the supporting via hole 15, and an outer edge of an end surface of the connection portion 12, which is far from the tail end of the avoiding portion 11, is rounded. When connecting portion 12 is connected with outer sword pipe 2, straight tubular connecting portion 12 can insert outer sword pipe 2 in, can pass through interference fit connection between outer sword pipe 2 and the connecting portion 12, also can adopt laser welding, and laser welding has advantages such as deformation is little, fast. When the connecting part 12 is inserted into the outer cutter tube 2, the round corners of the outer edge of the end face can guide the connecting part 12, so that the insertion of the connecting part 12 is facilitated.
In the present embodiment, the connecting portion 12 is connected to the end face of the trailing end, and the radial dimension of the trailing end is larger than the radial dimension of the connecting portion 12. Since the radial dimension of the tail end is larger than that of the connecting part 12, when the connecting part 12 is inserted into the outer cutter tube 2, the end face of the tail end can limit the insertion depth of the connecting part 12, thereby ensuring the total length of the support 1 after being connected with the outer cutter tube 2.
As shown in fig. 3, 7 and 9, in some embodiments, the support member 1 further includes a sheath 16, where the sheath 16 is disposed on the relief portion 11, and a grinding position for grinding the grinding portion 31 of the bit body 3 is in front of the head end of the relief portion 11, and the sheath 16 at least partially surrounds the grinding position in a lateral direction of the relief portion 11. The leading end of the escape portion 11 is forward from the trailing end toward the leading end, that is, the direction in which the grinding portion 31 is located. The lateral direction of the avoidance portion 11 is perpendicular to the direction of the line between the trailing end and the leading end. Since sheath 16 at least partially surrounds the grinding site, when grinding portion 31 grinds the lesion tissue, sheath 16 is positioned between grinding portion 31 and other surrounding human tissue, and serves as a shield for the other human tissue.
As shown in fig. 5, the present embodiment further provides a surgical abrasive drill, which includes a drill body 3, an outer cutter tube 2 and the support member 1, wherein the support member 1 is connected to one end of the outer cutter tube 2, a rod portion 32 of the drill body 3 is inserted into the support member 1 and the outer cutter tube 2, and a grinding portion 31 of the drill body 3 is at least partially exposed from a head end of the support member 1.
As shown in fig. 4 and 5, in the present embodiment, a support pipe 4 is provided in the outer cutter pipe 2, and the support pipe 4 is fitted over the shaft portion 32 of the bit body 3 and supports the bit body 3 in the radial direction of the bit body 3.
Specifically, the surgical abrasive drill in this embodiment further includes a support body 5, and one ends of the outer cutter tube 2 and the support tube 4, which are far away from the support member 1, are inserted into the support body 5, and the support body 5 plays a role in supporting and fixing the outer cutter tube 2 and the support tube 4. The end of the shank 32 of the bit body 3 remote from the grinding portion 31 passes through and is exposed to the support body 5 so as to be connected to a power source for driving the bit body 3 to obtain power. At the same time, the supporting body 5 also plays a role of restraining and supporting the rod portion 32.
In summary, in the support member 1 for the drill outer cutter tube 2 and the surgical drill according to the present embodiment, since the outer diameter of the head end of the relief portion 11 is smaller than the outer diameter of the outer cutter tube 2, the relief portion 11 can reduce the interference of the outer contour of the support member 1 to the view of the endoscope apparatus after the support member is connected to the outer cutter tube 2. Meanwhile, the support member 1 is provided with a support via hole 15, and when the bit body 3 is penetrated in the support via hole 15, the support member 1 can support the bit body 3. The avoiding part 11 is arranged in the supporting piece 1, and an avoiding structure is arranged without increasing the wall thickness of the outer cutter tube 2, so that the wall thickness of the outer cutter tube 2 is reduced, and the overall weight of the grinding and drilling tool is reduced.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A support for an outer cutter tube of a drill bit, the support comprising:
an avoiding part having a head end and a tail end,
a connecting part for connecting with the outer cutter tube and arranged at the tail end of the avoiding part, and
the supporting through hole is used for enabling the rod part of the drill bit body to pass through, and is arranged along the axial direction of the avoiding part and the connecting part and penetrates through the avoiding part and the connecting part;
the outer diameter of the head end of the avoiding part is smaller than that of the outer cutter tube.
2. The support for an outer cutter tube of a drill bit of claim 1, wherein the relief head end has an outer diameter that decreases in size from the tail end toward the head end.
3. The support for a ground bit outer cutter tube of claim 1, wherein the relief portion comprises a first step proximate the head end and a second step proximate the tail end, the first step having an outer diameter less than an outer diameter of the second step.
4. A support for a drill bit outer cutter tube according to claim 3, wherein a transition region is provided between the first step and the second step, and wherein the first step and the second step are connected by a smooth transition of the transition region.
5. The support for an outer cutter tube of a drill bit of claim 2, wherein the relief is frustoconical and the head end has an outer diameter less than an outer diameter of the tail end.
6. The support member for an outer cutter tube of a drill bit according to claim 1, wherein the connecting portion is in a straight cylindrical shape and is arranged along the opening direction of the supporting via hole, and an outer edge of an end face of the connecting portion, which is far away from the tail end of the avoiding portion, is a rounded corner.
7. The support for an outer cutter tube of a drill bit of claim 6, wherein the connecting portion is connected to an end face of the trailing end, and wherein a radial dimension of the trailing end is greater than a radial dimension of the connecting portion.
8. The support for grinding bit outer cutter tube of any one of claims 1 to 7, further comprising a sheath disposed over the relief portion, the relief portion forward of the head end being a grinding location for grinding a grinding portion of the bit body, the sheath at least partially surrounding the grinding location laterally of the relief portion.
9. A surgical abrasive drill, comprising a drill body, an outer cutter tube and the support member according to any one of claims 1 to 8, wherein the support member is connected to one end of the outer cutter tube, the shaft portion of the drill body is inserted into the support member and the outer cutter tube, and the grinding portion of the drill body is at least partially exposed from the head end of the support member.
10. The surgical burr of claim 9, wherein a support tube is disposed within the outer cutter tube, the support tube being sleeved on a shank of the bit body and supporting the bit body in a radial direction of the bit body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320092640.4U CN219323463U (en) | 2023-01-31 | 2023-01-31 | Support piece for grinding outer cutter tube of drill bit and grinding drill for operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320092640.4U CN219323463U (en) | 2023-01-31 | 2023-01-31 | Support piece for grinding outer cutter tube of drill bit and grinding drill for operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219323463U true CN219323463U (en) | 2023-07-11 |
Family
ID=87067837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320092640.4U Active CN219323463U (en) | 2023-01-31 | 2023-01-31 | Support piece for grinding outer cutter tube of drill bit and grinding drill for operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219323463U (en) |
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2023
- 2023-01-31 CN CN202320092640.4U patent/CN219323463U/en active Active
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