CN219306837U - Cutter connection structure and operation grinding cutter - Google Patents
Cutter connection structure and operation grinding cutter Download PDFInfo
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- CN219306837U CN219306837U CN202320698841.9U CN202320698841U CN219306837U CN 219306837 U CN219306837 U CN 219306837U CN 202320698841 U CN202320698841 U CN 202320698841U CN 219306837 U CN219306837 U CN 219306837U
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- bearing
- limiting
- transmission shaft
- outer ring
- mounting channel
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- 238000000227 grinding Methods 0.000 title claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 48
- 230000000903 blocking effect Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 238000003801 milling Methods 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
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Abstract
The utility model provides a cutter connecting structure and a surgical grinding cutter, wherein the cutter connecting structure comprises a handle body and a transmission shaft, and the handle body is provided with a mounting channel penetrating through the handle body; the transmission shaft is rotatably arranged in the handle body through a bearing; the bearing is sleeved on the transmission shaft, a first limiting step and an inner ring limiting piece are arranged on the transmission shaft and are positioned outside two ends of the inner ring of the bearing, and the inner ring of the bearing is axially limited through the first limiting step and the inner ring limiting piece; the outer ring of the bearing is tightly matched with the mounting channel, the mounting channel is provided with a second limiting step and an outer ring limiting assembly for axially limiting the outer ring of the bearing, and the outer ring of the bearing is axially limited through the second limiting step and the outer ring limiting assembly; the outer race stop assembly includes a washer and a blocking member embedded in a sidewall of the mounting channel. Compared with the prior art, in this scheme through simple structure with the bearing installation handle body in, make the conveying structure of grinding cutter wholly comparatively simple, and the transmission is stable.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a cutter connecting structure and a surgical grinding cutter.
Background
In the surgical operation, a grinding cutter is generally adopted to finely grind and cut bone tissues, and the current grinding cutter mainly comprises a handle body and a grinding head, wherein the front end of the handle body is connected with the grinding head; when the grinding head is used, the rear end of the handle body is connected with the power module, and the power module transmits power to the grinding head part through the inside of the handle body, so that the grinding head rotates to realize the functions of grinding and cutting tissues and bones.
The existing connection mode of the grinding head and the power module adopts mechanical transmission, and the mechanical transmission structure is too complex, the volume and the weight are too large, so that the operation effect and the efficiency are affected. Meanwhile, more fixing pieces are needed for positioning the connection positions of the grinding heads and the handle body, and the problems that the positions are difficult to limit and the connection is unstable exist.
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 tool connecting structure and a surgical grinding tool, which are used for solving the problems of difficult limitation and unstable connection of a structural connecting position for transmitting a grinding head part in a handle body in the prior art.
To achieve the above object and other related objects, the present utility model provides the following technical solutions:
a tool coupling structure comprising:
the handle body is provided with a mounting channel penetrating through the handle body;
the transmission shaft is rotatably arranged in the handle body through a bearing;
the bearing is sleeved on the transmission shaft, a first limiting step and an inner ring limiting piece are arranged on the transmission shaft and are positioned outside two ends of the bearing inner ring, and the bearing inner ring is axially limited through the first limiting step and the inner ring limiting piece;
the outer ring of the bearing is tightly matched with the mounting channel, a second limiting step and an outer ring limiting assembly for axially limiting the outer ring of the bearing are arranged on the mounting channel, and the outer ring of the bearing is axially limited through the second limiting step and the outer ring limiting assembly;
the outer ring limiting assembly comprises a gasket and a blocking part embedded into the side wall of the installation channel, and the blocking part compresses the outer ring on the second limiting step through the gasket.
Optionally, the structure of blocking part includes being located the fender dish of transmission shaft periphery and with the cantilever that keeps off the dish and be connected, the cantilever is followed fender dish circumference interval distribution, the tip embedding of cantilever installation passageway lateral wall.
Optionally, the cantilever is inclined relative to the baffle plate in a direction away from the gasket.
Optionally, the cantilever arms are resilient, contract radially of the mounting channel when installed therein, and extend outwardly and insert into the mounting channel side walls when installed in place.
Optionally, the inner ring limiting part is a locking sleeve, an annular groove ring is arranged on the transmission shaft, and the locking sleeve is pressed and deformed and embedded into the groove ring so that the locking sleeve is fixed in the axial direction of the transmission shaft.
Optionally, the inner ring limiting part is a locking sleeve, an annular groove ring is arranged on the transmission shaft, and the locking sleeve is pressed and deformed and embedded into the groove ring so that the locking sleeve is fixed in the axial direction of the transmission shaft.
Optionally, a convex ring is integrally arranged on the bearing outer ring, and the convex ring abuts against the second limiting step;
or (b)
The end part of the outer end of the bearing is tightly propped against the second limiting step to limit.
Optionally, the handle is connected with the bracing piece in the handle body, the rear end of bracing piece stretches into in the installation passageway and with the inner wall fixed connection of installation passageway.
Optionally, the part that the bracing piece stretches into in the installation passageway is bracing piece connecting portion, the surface of bracing piece connecting portion is provided with the annular knurl structure, the inner wall of installation passageway through the mode of hot melt with annular knurl structure realizes sealing connection.
Optionally, a portion of the support rod, which is located outside the mounting channel and is close to the handle body, is a support rod supporting portion, and an outer diameter of the support rod supporting portion is consistent with an outer diameter of the support rod connecting portion.
Optionally, the end of the supporting rod connecting part and the end of the outer ring of the bearing are directly or indirectly abutted against the limit in the mounting channel.
Correspondingly, the utility model also provides a surgical grinding tool, which comprises:
the cutter connecting structure is any one of the cutter connecting structures;
the grinding head assembly comprises a rod part and a blade part arranged at the front end of the rod part, the support rod is sleeved outside the rod part, and the rear end of the rod part extends into the mounting channel and is fixedly connected with the transmission shaft;
the power module is connected to the rear end of the handle body and drives the grinding head assembly to rotate through the transmission shaft.
According to the utility model, the inner ring of the bearing is axially limited by the first limiting steps and the inner ring limiting parts which are arranged outside two ends of the inner ring of the bearing, and the outer ring of the bearing is axially limited by the second limiting steps and the outer ring limiting components which are arranged on the mounting channel and used for axially limiting the outer ring of the bearing, wherein the outer ring limiting components compress the outer ring on the second limiting steps by adopting gaskets; the bearing is simple to connect and position, the transmission shaft is convenient to set and connect, the volume of the transmission part is effectively reduced, the position of the transmission part is rapidly limited firmly, and the grinding tool is convenient to use. Compared with the prior art, through the structure of step and locating part in this scheme, install the handle body with the bearing in, the transmission shaft then installs in the bearing, makes grinding cutter's conveying structure whole comparatively simple, and the transmission is stable.
Drawings
FIG. 1 is a schematic view of an exemplary surgical milling tool of the present utility model;
FIG. 2 is an exploded view of an exemplary surgical milling cutter according to the present utility model;
FIG. 3 is a cross-sectional view of an exemplary surgical milling tool of the present utility model;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is an enlarged view at B in FIG. 3;
FIG. 6 is an enlarged view at C in FIG. 2;
fig. 7 is a structural cross-sectional view of another exemplary surgical grinding tool of the present utility model.
The reference numerals in the embodiments include:
the handle body 100, the mounting channel 110, the first channel section 111, the second channel section 112, the second limiting step 113, the connecting part 120,
Bearing 200, inner race 210, outer race 220, collar 221, locking sleeve 230, blocking member 240, baffle 241, cantilever 242, washer 250,
A transmission shaft 300, a groove ring 301, a first limiting step 302,
Grinding head assembly 400, rod 401, blade 402,
The support bar 500, the support bar connection portion 510, the knurled structure 511, the support bar support portion 520, the abutment 530.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.
It should be understood that the present utility model may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, like numbers refer to like elements throughout.
In the present utility model, the cutter coupling structure is a part of the surgical grinding cutter, and the cutter coupling structure is used to fixedly couple the transmission shaft 300 coupled with the power module to the inside of the handle body 100, so that the installation of the grinding head assembly 400 in the surgical grinding cutter is facilitated. Specifically, referring to fig. 1 and 2 in combination, the surgical grinding tool includes a tool connection structure, a grinding head assembly 400, and a power module, where the tool connection structure may be any one of the following embodiments, the grinding head assembly 400 includes a rod portion 401 and a grinding portion 402 disposed at a front end of the rod portion 401, a support rod 500 is sleeved on the rod portion 401, and a rear end of the rod portion 401 extends into the mounting channel 110 of the handle body 100 and is fixedly connected with the transmission shaft 300; the power module is connected to the rear end of the handle body 100, and drives the grinding head assembly 400 to rotate through the transmission shaft 300.
The rear end of the handle body 100 is provided with a connecting portion 120 matching with the power module, the connecting portion 120 is connected with the power module in a clamping manner, and for the surgical grinding tool and all the components inside the surgical grinding tool, one end facing the blade 402 is a front end, and one end facing the power module is a rear end.
Referring to fig. 3 to 7 in combination, the specific structure of the tool connecting structure in the present utility model includes:
a handle grip body 100 provided with a mounting passage 110 penetrating the handle grip body 100;
a transmission shaft 300 rotatably installed in the handle grip body 100 through a bearing 200;
the bearing 200 is sleeved on the transmission shaft 300, a first limiting step 302 and an inner ring 210 limiting piece are arranged on the transmission shaft 300 and are positioned outside two ends of the inner ring 210 of the bearing 200, and the inner ring 210 of the bearing 200 is axially limited by the first limiting step 302 and the inner ring 210 limiting piece;
the outer ring 220 of the bearing 200 is tightly matched with the mounting channel 110, a second limiting step 113 and an outer ring 220 limiting component for axially limiting the outer ring 220 of the bearing 200 are arranged on the mounting channel 110, and the outer ring 220 of the bearing 200 is axially limited through the second limiting step 113 and the outer ring 220 limiting component;
the outer ring 220 limiting assembly comprises a gasket 250 and a blocking part 240 embedded in the side wall of the mounting channel 110, wherein the blocking part 240 presses the outer ring 220 on the second limiting step 113 through the gasket 250.
The installation channel 110 comprises a first channel section 111 and a second channel section 112, wherein the inner diameter of the first channel section 111 is smaller than that of the second channel section 112, and the connection part between the second channel section 112 and the second channel section 112 is a second limit step 113; the first channel section 111 is located at the front end (left end in fig. 3 and 4) of the second channel section 112, and in order to facilitate the installation of the propeller shaft 300 and the power module, the rear end (right end in fig. 3 and 4) of the second channel section 112 in the installation channel 110 has a larger diameter than the front end of the second channel section 112, and the inner ring 210 stopper and the outer ring 220 stopper are both located in the front end of the second channel section 112. The left end of the transmission shaft 300 is a step, a first limiting step 302 is arranged at the step, and the left end of the inner ring 210 of the bearing 200 is abutted against the first limiting step 302.
In an actual implementation process, the rear end of the transmission shaft 300 is connected with the power module, the front end of the transmission shaft 300 is connected with the grinding head assembly 400, and the hand-held handle body 100 starts the power module to enable the grinding head assembly 400 to rotate. The transmission shaft 300 is connected with the handle body 100 through the bearing 200, the transmission shaft 300 is not affected outside the handle body 100 while transmitting power, and the positions of the transmission shaft 300 are fixed in the axial direction by limiting the two ends of the inner ring 210 and the outer ring 220 of the bearing 200 respectively, so that the power transmission of the power module is facilitated.
In some embodiments, the blocking member 240 includes a blocking plate 241 disposed at the periphery of the driving shaft 300 and a plurality of cantilever arms 242 connected to the blocking plate 241, the cantilever arms 242 being circumferentially spaced apart along the blocking plate 241, and the end portions of the cantilever arms 242 being embedded in the side walls of the mounting channel 110. For example, as shown in fig. 4 and 6, the cantilever 242 is disposed around the baffle plate 241, and the cantilever 242 is embedded into the sidewall of the mounting channel 110, so that the blocking member 240 presses the gasket 250 and the axial position is not moved, that is, the right end of the outer ring 220 of the bearing 200 is positioned.
In some embodiments, the cantilever 242 is inclined relative to the baffle 241 in a direction away from the gasket 250. For example, as shown in fig. 4, in actual implementation, the cantilever 242 is inclined to the right of the baffle plate 241, which facilitates the embedding of the cantilever 242 into the sidewall of the mounting channel 110 during mounting.
In some embodiments, referring to fig. 4 in combination, the cantilever arms 242 are resilient, and when installed into the mounting channel 110, contract in a radial direction of the mounting channel 110, and when installed in place, the cantilever arms 242 extend outwardly and are inserted into the side walls of the mounting channel 110. I.e. the outer edge of the blocking member 240 has a certain elasticity, the cantilever 242 can be contracted to the right by a corresponding tool, and when the blocking member 240 is positioned at a proper position, the cantilever 242 is released, and the cantilever 242 can be stretched under the action of elasticity to be embedded into the mounting channel 110, i.e. the position of the blocking member 240 in the mounting channel 110 is determined.
In some embodiments, the inner ring 210 is a locking sleeve 230, the transmission shaft 300 is provided with an annular groove ring 301, and the locking sleeve 230 is pressed and deformed to be embedded in the groove ring 301, so that the locking sleeve 230 is fixed in the axial direction of the transmission shaft 300. For example, as shown in fig. 4, the groove ring 301 is disposed at the front section of the transmission shaft 300, the locking sleeve 230 is made of metal, and the locking sleeve 230 is deformed and embedded into the groove ring 301 after being pressed, so as to fix the bearing 200 to the transmission shaft 300, the right end face of the inner ring 210 of the bearing 200 can be abutted against the left end face of the locking sleeve 230, and the inner ring 210 of the bearing 200 can be fixed to the transmission shaft 300 in cooperation with the first limiting step 302.
In some embodiments, a convex ring 221 is integrally provided on the outer ring 220 of the bearing 200, and the convex ring 221 abuts against the second limiting step 113. For example, as shown in fig. 4, the outer diameter of the left end of the outer ring 220 of the bearing 200 is smaller than the outer diameter of the right end, the outer diameter variation of the outer ring 220 of the bearing 200 is a convex ring 221, and the convex ring 221 is matched with the second limiting step 113 to abut tightly, so that the outer ring 220 of the bearing 200 can be limited. In other embodiments, the end of the outer end of the bearing 200 abuts against the second limiting step 113. The diameter of the outer ring 220 of the specific bearing 200 is kept consistent, and the left end of the outer ring 220 of the bearing 200 abuts against the second limiting step 113, so that the left end of the outer ring 220 of the bearing 200 can be limited.
In some embodiments, a support rod 500 is connected to the handle body 100, and a rear end of the support rod 500 extends into the mounting channel 110 and is fixedly connected to an inner wall of the mounting channel 110. For example, as shown in fig. 3, the right end of the support rod 500 extends into the first channel section 111 of the mounting channel 110 and is fixedly connected to the inner wall of the mounting channel 110.
In some embodiments, the portion of the support rod 500 extending into the mounting channel 110 is a support rod connection portion 510, a knurled structure 511 is disposed on an outer surface of the support rod connection portion 510, and an inner wall of the mounting channel 110 is in sealing connection with the knurled structure 511 by means of heat fusion. For example, as shown in fig. 5, in the present embodiment, the support rod 500 is made of a metal structural member, and the handle body 100 is made of a plastic structural member; in order to make the connection between the support rod connection portion 510 and the handle body 100 more firm and to avoid the immersion of the transmission shaft 300 into the liquid, a knurling structure 511 is formed on the outer surface of the support rod connection portion 510, and the inner wall of the first channel section 111 of the handle body 100 is heated to melt and wrap the knurling structure 511, so as to realize the sealing connection between the support rod 500 and the handle body 100.
In some embodiments, the portion of the support rod 500 located outside the first channel section 111 near the handle body is a support rod supporting portion 520, the outer diameter of the support rod supporting portion 520 is consistent with the outer diameter of the support rod connecting portion 510, and the end portion of the support rod connecting portion 510 and the end portion of the outer ring 220 of the bearing 200 directly or indirectly abut against and are limited in the first channel section 111. Specifically, the end of the support rod connection portion 520 may or may not directly contact with the outer ring of the bearing 200 in the mounting channel 110.
In other embodiments, the end of the support bar connection 520 is not in direct or indirect contact with the bearing 200 in the mounting channel 110. For example, as shown in fig. 7, the rear end of the supporting rod 500 extends into the mounting channel 110, so that the supporting rod connecting portion 520 is located in the first channel section 111, and the position of the supporting rod 500 extending into the first channel end 111 can be controlled by an installation tool when the supporting rod 500 is assembled, at this time, the end of the supporting rod connecting portion 510 and the end of the bearing 200 do not need to be tightly limited in the first channel section 111, and are not directly or indirectly connected or contacted.
In some embodiments, the end of the support rod connection 520 and the outer ring end of the bearing 200 directly or indirectly abut against a limit in the mounting channel 110. For example, as shown in fig. 5, the outer diameter of the support bar supporting part 520 is consistent with the outer diameter of the support bar connecting part 510, and the rear end of the support bar 500 is inserted into the installation channel 110 to be abutted against the left end of the outer ring 220 of the bearing 200 through the abutment 530 in the first channel section 111, so that the support bar 500 can be positioned when the support bar 500 is assembled.
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 (11)
1. A tool attachment structure, comprising:
the handle body is provided with a mounting channel penetrating through the handle body;
the transmission shaft is rotatably arranged in the handle body through a bearing;
the bearing is sleeved on the transmission shaft, a first limiting step and an inner ring limiting piece are arranged on the transmission shaft and are positioned outside two ends of the bearing inner ring, and the bearing inner ring is axially limited through the first limiting step and the inner ring limiting piece;
the outer ring of the bearing is abutted with the mounting channel, a second limiting step and an outer ring limiting assembly for axially limiting the outer ring of the bearing are arranged on the mounting channel, and the outer ring of the bearing is axially limited through the second limiting step and the outer ring limiting assembly;
the outer ring limiting assembly comprises a gasket and a blocking part embedded into the side wall of the installation channel, and the blocking part compresses the outer ring on the second limiting step through the gasket.
2. The tool attachment structure of claim 1, wherein: the structure of the blocking part comprises a blocking disc positioned at the periphery of the transmission shaft and cantilevers connected with the blocking disc, wherein the cantilevers are distributed at intervals along the circumferential direction of the blocking disc, and the end parts of the cantilevers are embedded into the side wall of the mounting channel.
3. The tool attachment structure according to claim 2, wherein: the cantilever is inclined relative to the baffle plate in a direction away from the gasket.
4. A tool attachment structure according to claim 3, wherein: the cantilever arms are resilient and contract radially of the mounting channel when installed therein, and extend outwardly and insert into the mounting channel side walls when installed in place.
5. The tool attachment structure of claim 1, wherein: the inner ring limiting part is a locking sleeve, an annular groove ring is arranged on the transmission shaft, and the locking sleeve is pressed and deformed and embedded into the groove ring so that the locking sleeve is fixed in the axial direction of the transmission shaft.
6. The tool attachment structure according to any one of claims 1-5, wherein:
a convex ring is integrally arranged on the bearing outer ring and is abutted with the second limiting step;
or (b)
The end part of the outer end of the bearing is tightly propped against the second limiting step to limit.
7. The tool attachment structure of claim 6, wherein: the handle is characterized in that a supporting rod is connected in the handle body, and the rear end of the supporting rod stretches into the mounting channel and is fixedly connected with the inner wall of the mounting channel.
8. The tool attachment structure of claim 7, wherein: the part of the support rod extending into the installation channel is a support rod connecting part, the outer surface of the support rod connecting part is provided with a knurling structure, and the inner wall of the installation channel is in sealing connection with the knurling structure in a hot melting mode.
9. The tool attachment structure of claim 8, wherein: the part of the support rod, which is close to the handle body and is positioned outside the installation channel, is a support rod supporting part, and the outer diameter of the support rod supporting part is consistent with the outer diameter of the support rod connecting part.
10. The tool attachment structure of claim 9, wherein: the end part of the supporting rod connecting part and the end part of the outer ring of the bearing are directly or indirectly abutted and limited in the mounting channel.
11. A surgical grinding tool, comprising:
a tool coupling arrangement according to any one of claims 1-10;
the grinding head assembly comprises a rod part and a blade part arranged at the front end of the rod part, the support rod is sleeved outside the rod part, and the rear end of the rod part extends into the mounting channel and is fixedly connected with the transmission shaft;
the power module is connected to the rear end of the handle body and drives the grinding head assembly to rotate through the transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320698841.9U CN219306837U (en) | 2023-03-31 | 2023-03-31 | Cutter connection structure and operation grinding cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320698841.9U CN219306837U (en) | 2023-03-31 | 2023-03-31 | Cutter connection structure and operation grinding cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219306837U true CN219306837U (en) | 2023-07-07 |
Family
ID=87032683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320698841.9U Active CN219306837U (en) | 2023-03-31 | 2023-03-31 | Cutter connection structure and operation grinding cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219306837U (en) |
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2023
- 2023-03-31 CN CN202320698841.9U patent/CN219306837U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 401121 Jupiter science and technology development center, Gaoxin Park, northern New District, Yubei District, Chongqing (No. 9, middle section of Huangshan Avenue) Patentee after: CHONGQING XISHAN SCIENCE & TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 401121 Jupiter Science and Technology Development Center, High tech Park, New North Zone, Beibei District, Chongqing (No. 9, Middle Section of Mount Huangshan Avenue) Patentee before: CHONGQING XISHAN SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |