CN219306837U - Tool Connection Structure and Surgical Grinding Tool - Google Patents

Abstract

The utility model provides a tool connection structure and a surgical grinding tool. The tool connection structure includes a handle body and a transmission shaft. The handle body is provided with an installation channel passing through the handle body; Inside the shank; the bearing is overlaid on the transmission shaft, and the transmission shaft is provided with a first limit step and an inner ring limit piece located outside the two ends of the inner ring of the bearing, and the inner ring of the bearing passes through the first limit step and the inner ring limit piece Axial limit: The outer ring of the bearing is closely matched with the installation channel, and the second limit step and the outer ring limit assembly for the axial limit of the bearing outer ring are arranged on the installation channel, and the outer ring of the bearing passes through the second limit step and the outer ring limit assembly axially limit; the outer ring limit assembly includes a gasket and a blocking part embedded in the side wall of the installation channel. Compared with the prior art, in this solution, the bearing is installed in the handle body through a simple structure, so that the overall transmission structure of the grinding tool is relatively simple, and the transmission is stable.

Description

Tool Connection Structure and Surgical Grinding Tool

technical field

The utility model belongs to the technical field of medical equipment, in particular to a knife connection structure and an operation grinding knife.

Background technique

In surgery, grinding tools are usually used to finely grind and cut bone tissue. The current grinding tools mainly include a handle body and a grinding head, and the front end of the handle body is connected to the grinding head; The rear end of the body is connected to 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 achieve the functions of grinding, cutting tissue and bone.

The current connection method between the grinding head and the power module adopts a mechanical transmission. The structure of the mechanical transmission is too complicated and the volume and weight are too large, which affects the surgical effect and efficiency. At the same time, more fixing parts are required for positioning the connection position between the grinding head and the handle body, which has the problems of difficult to define the position and weak connection.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a tool connection structure and a surgical grinding tool, which is used to solve the limitation of the structural connection position in the handle body for driving the grinding head part in the prior art. Difficult and weak connections.

In order to achieve the above purpose and other related purposes, the technical solution of the utility model is as follows:

A tool connection structure, comprising:

The handle body is provided with an installation channel passing through the handle body;

The transmission shaft is rotatably installed in the handle body through a bearing;

The bearing is overlaid on the transmission shaft, and the transmission shaft is provided with a first limiting step and an inner ring limiting member located outside both ends of the inner ring of the bearing, and the inner ring of the bearing passes through the first The limit step and the inner ring limit member are axially limited;

The outer ring of the bearing is closely matched with the installation channel, and the second limit step and the outer ring limit assembly for the axial limit of the outer ring of the bearing are arranged on the installation channel, and the outer ring of the bearing passes through The second limiting step and the outer ring limiting component are axially limited;

The outer ring limiting assembly includes a washer and a blocking component embedded in the side wall of the installation channel, and the blocking component presses the outer ring on the second limiting step through the washer.

Optionally, the structure of the blocking member includes a baffle plate located on the periphery of the transmission shaft and a cantilever connected to the baffle plate, the cantilever is distributed at intervals along the circumference of the baffle plate, and the end of the cantilever is embedded in the The side wall of the installation channel.

Optionally, the cantilever is inclined in a direction away from the washer relative to the baffle plate.

Optionally, the cantilever has elasticity, and shrinks along the radial direction of the installation channel when it is installed in the installation channel, and when installed in place, the cantilever extends outward and inserts into the side wall of the installation channel.

Optionally, the inner ring limiter is a locking sleeve, and the transmission shaft is provided with an annular groove ring, and the locking sleeve is deformed and embedded in the groove ring so that the locking sleeve It is fixed in the axial direction of the transmission shaft.

Optionally, the inner ring limiter is a locking sleeve, and the transmission shaft is provided with an annular groove ring, and the locking sleeve is deformed and embedded in the groove ring so that the locking sleeve It is fixed in the axial direction of the transmission shaft.

Optionally, a protruding ring is integrally provided on the outer ring of the bearing, and the protruding ring is pressed against the second limiting step;

or

The end of the outer end of the bearing is in close contact with the second limiting step for limiting.

Optionally, a support rod is connected in the body of the handle handle, and the rear end of the support rod extends into the installation channel and is fixedly connected with the inner wall of the installation channel.

Optionally, the part of the support rod protruding into the installation channel is a support rod connection part, the outer surface of the support rod connection part is provided with a knurled structure, and the inner wall of the installation channel is bonded to the The knurled structure achieves a sealed connection.

Optionally, the part of the support rod close to the handle body outside the installation channel is a support rod support part, and the outer diameter of the support rod support part is consistent with the outer diameter of the support rod connecting part.

Optionally, the end of the connecting part of the support rod and the end of the outer ring of the bearing are directly or indirectly abutted against each other in the installation channel.

Correspondingly, the utility model also provides a surgical grinding tool, including:

A tool connection structure, the tool connection structure being any one of the tool connection structures described above;

The grinding head assembly includes 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 installation channel to communicate with the transmission Shaft fixed connection;

A power module, the power module is connected to the rear end of the handle body, and the power module drives the grinding head assembly to rotate through the transmission shaft.

In the utility model, the inner ring of the bearing is axially limited by the first limit step and the inner ring limit piece located outside the two ends of the inner ring of the bearing on the transmission shaft, and the installation channel is provided with a The second limit step and the outer ring limit assembly of the bearing outer ring axially limit the axial limit of the outer ring of the bearing, wherein the outer ring limit assembly uses the gasket to press the outer ring to the second limit It makes the connection and positioning of the bearing simpler, facilitates the setting and connection of the transmission shaft, effectively reduces the volume of the transmission part, and quickly and firmly limits the position of the transmission part, which is convenient for the use of grinding tools. Compared with the prior art, in this solution, the bearing is installed in the handle body through the structure of steps and stoppers, and the transmission shaft is installed in the bearing, so that the overall transmission structure of the grinding tool is relatively simple, and the transmission Stablize.

Description of drawings

Fig. 1 is a schematic structural view of an exemplary surgical grinding tool of the present invention;

Fig. 2 is an exploded view of the structure of an exemplary surgical grinding tool of the present invention;

Fig. 3 is a structural sectional view of an exemplary surgical grinding tool of the present invention;

Fig. 4 is the enlarged view of place A in Fig. 3;

Fig. 5 is the enlarged view of place B in Fig. 3;

Figure 6 is an enlarged view at C in Figure 2;

Fig. 7 is a structural cross-sectional view of another exemplary surgical grinding tool of the present invention.

The description of reference numerals in the embodiment includes:

The handle body 100, the installation channel 110, the first channel section 111, the second channel section 112, the second limit step 113, the connecting part 120,

Bearing 200, inner ring 210, outer ring 220, protruding ring 221, locking sleeve 230, blocking member 240, stop disc 241, cantilever 242, washer 250,

Transmission shaft 300, groove ring 301, first limit step 302,

Grinding head assembly 400, rod portion 401, blade portion 402,

The support rod 500 , the support rod connection part 510 , the knurl structure 511 , the support rod support part 520 , and the sleeve 530 .

Detailed ways

In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

It should be understood that the invention can be embodied in different 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 invention to those skilled in the art. In the drawings, like reference numerals refer to like components throughout.

In the utility model, the tool connection structure is a part of the surgical grinding tool, and the tool connection structure is used to fix the transmission shaft 300 connected with the power module to the inside of the handle body 100, so as to facilitate the grinding of the surgical grinding tool. Assembly 400 is installed. Specifically, the specific structure of the surgical grinding tool is combined with reference to Figure 1 and Figure 2, the surgical grinding tool includes a tool connection structure, a grinding head assembly 400 and a power module, and the tool connection structure can be implemented in any of the following embodiments According to the tool connection structure of the example, the grinding head assembly 400 includes a rod part 401 and a grinding part 402 arranged at the front end of the rod part 401, the support rod 500 is placed outside the rod part 401, and the rear end of the rod part 401 It is fixedly connected to the transmission shaft 300 in the installation channel 110 of the handle body 100; the power module is connected to the rear end of the handle body 100, and the power module drives the grinding head through the transmission shaft 300 Assembly 400 rotates.

Wherein, the rear end of the handle handle body 100 is provided with a connecting portion 120 that matches the power module, and the connecting portion 120 is connected to the power module by snap-fitting. One end of 402 is the front end, and the end facing the power module is the rear end.

The specific structure of the tool connection structure in the utility model is combined with reference to Fig. 3 to Fig. 7, and the tool connection structure includes:

The handle body 100 is provided with an installation channel 110 passing through the handle body 100;

The transmission shaft 300 is rotatably installed in the handle body 100 through the bearing 200;

The bearing 200 is overlaid on the transmission shaft 300, and the transmission shaft 300 is provided with a first limiting step 302 and a limiting member of the inner ring 210 located outside the two ends of the inner ring 210 of the bearing 200. The bearing 200 The inner ring 210 is axially limited by the first limiting step 302 and the inner ring 210 limiting member;

The outer ring 220 of the bearing 200 is closely matched with the installation channel 110, and the installation channel 110 is provided with a second limit step 113 for the axial limit of the outer ring 220 of the bearing 200 and the limit of the outer ring 220. Assemblies, the outer ring 220 of the bearing 200 is axially limited by the second limiting step 113 and the outer ring 220 limiting assembly;

The limiting assembly of the outer ring 220 includes a washer 250 and a blocking member 240 embedded in the side wall of the installation channel 110 , the blocking member 240 presses the outer ring 220 on the second limiting step 113 through the washer 250 .

Wherein, the installation channel 110 includes a first channel section 111 and a second channel section 112, the inner diameter of the first channel section 111 is smaller than the inner diameter of the second channel section 112, and the second channel section 112 and the second channel section 112 is the second limit step 113; the first channel section 111 is located at the front end of the second channel section 112 (the left end in Figure 3 and Figure 4), in order to facilitate the installation of the transmission shaft 300 and the power module, the installation channel 110 The diameter of the rear end (the right end in Fig. 3 and Fig. 4) of the second channel section 112 is greater than the diameter of the front end of the second channel section 112, and the inner ring 210 limiter and the outer ring 220 limiter are located in the second channel segment 112 in the front end. The left end of the transmission shaft 300 is a step, and the step is a first limiting step 302 , and the left end of the inner ring 210 of the bearing 200 is pressed against the first limiting step 302 .

In actual implementation, the rear end of the transmission shaft 300 is connected to the power module, and the front end of the transmission shaft 300 is connected to the grinding head assembly 400 , and the power module can be activated by holding the handle body 100 to make the grinding head assembly 400 rotate. The transmission shaft 300 and the handle body 100 are connected through the bearing 200. While the transmission shaft 300 transmits power, the outside of the handle body 100 is not affected. By connecting the inner ring 210 and the outer ring 220 of the bearing 200 The position limit fixes the position of the transmission shaft 300 in the axial direction, so as to facilitate the power transmission of the power module.

In some embodiments, the structure of the blocking member 240 includes a stopper 241 located on the periphery of the transmission shaft 300 and a cantilever 242 connected to the stopper 241, and the cantilever 242 is spaced along the circumference of the stopper 241 Distribution, the end of the cantilever 242 is embedded in the side wall of the installation channel 110 . For example, as shown in FIG. 4 and FIG. 6 , a cantilever 242 is arranged around the baffle plate 241. By embedding the cantilever 242 into the side wall of the installation channel 110, the blocking member 240 is pressed against the washer 250 and the axial position does not move any more. That is, the positioning of the right end of the outer ring 220 of the bearing 200 is realized.

In some embodiments, the cantilever 242 is inclined in a direction away from the washer 250 relative to the stop plate 241 . For example, as shown in FIG. 4 , in an actual implementation process, the cantilever 242 is inclined to the right side of the stop plate 241 , which is convenient for the cantilever 242 to embed into the side wall of the installation channel 110 during installation.

In some embodiments, referring to FIG. 4 , the cantilever 242 has elasticity, and shrinks along the radial direction of the installation channel 110 when installed in the installation channel 110 , and the cantilever 242 stretches outward and Insert into the side wall of the installation channel 110 . That is, the outer edge of the blocking part 240 has a certain degree of elasticity, and the corresponding tool can be used to shrink the cantilever 242 to the right. When the blocking part 240 is in a proper position, the cantilever 242 is released, and the cantilever 242 stretches under the action of elasticity and can be inserted into the installation channel 110 In this way, the determination of the position of the blocking member 240 in the installation channel 110 is realized.

In some embodiments, the limiting part of the inner ring 210 is a locking sleeve 230, and the transmission shaft 300 is provided with an annular groove ring 301, and the locking sleeve 230 is deformed under pressure and embedded in the groove ring. In 301 , the lock 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 arranged at the front section of the transmission shaft 300, and the lock sleeve 230 is made of metal. After the lock sleeve 230 is under pressure, it will be deformed and embedded in the groove ring 301, so as to realize the connection with the transmission shaft 300. Fixed, the left end surface of the locking sleeve 230 can press the right end surface of the inner ring 210 of the bearing 200 tightly, and cooperate with the first limiting step 302 to fix the inner ring 210 of the bearing 200 on the transmission shaft 300 .

In some embodiments, a protruding ring 221 is integrally provided on the outer ring 220 of the bearing 200 , and the protruding 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, and the change of the outer diameter of the outer ring 220 of the bearing 200 is the convex ring 221 , and the convex ring 221 cooperates with the second limiting step 113 to resist tight, the outer ring 220 of the bearing 200 can be limited. In some other embodiments, the end of the outer end of the bearing 200 is in close contact with the second limiting step 113 for limiting. Specifically, the diameter of the outer ring 220 of the bearing 200 is consistent, and the left end of the outer ring 220 of the bearing 200 is pressed 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 inside the handle body 100 , and the rear end of the support rod 500 protrudes into the installation channel 110 and is fixedly connected with the inner wall of the installation channel 110 . For example, as shown in FIG. 3 , the right end of the support rod 500 protrudes into the first channel section 111 of the installation channel 110 and is fixedly connected with the inner wall of the installation channel 110 .

In some embodiments, the part of the support rod 500 protruding into the installation channel 110 is a support rod connection part 510, and the outer surface of the support rod connection part 510 is provided with a knurled structure 511, and the installation channel 110 The inner wall of the inner wall is sealed and connected with the knurled structure 511 by heat fusion. For example, as shown in Figure 5, the support rod 500 in this embodiment adopts metal structural parts, and the handle handle body 100 adopts plastic structural parts; 300 is immersed in the liquid, and the knurled structure 511 is processed on the outer surface of the connecting part 510 of the support rod. By heating the inner wall of the first channel section 111 of the handle body 100, it is melted and wrapped on the knurled structure 511, and the support rod 500 is realized. Sealed connection with the handle body 100.

In some embodiments, the part of the support rod 500 that is close to the handle body outside the first passage section 111 is a support rod support part 520, and the outer diameter of the support rod support part 520 and the support rod The outer diameter of the connection part 510 is kept consistent, and the end of the support rod connection part 510 and the end of the outer ring 220 of the bearing 200 are directly or indirectly abutted in the first channel section 111 to limit the position. Specifically, the end of the support rod connecting portion 520 may be in direct or indirect contact with the outer ring of the bearing 200 in the installation channel 110 , or may not be in contact.

In some other embodiments, the end of the support rod connecting portion 520 does not directly or indirectly contact the bearing 200 in the installation channel 110 . For example, as shown in FIG. 7, the rear end of the support rod 500 extends into the installation channel 110, so that the support rod connecting portion 520 is not located in the first channel section 111, and the support rod 500 can be controlled to extend through the installation tool when the support rod 500 is assembled. Into the first channel end 111, at this time, the end of the support rod connecting part 510 and the end of the bearing 200 do not need to be pressed against each other in the first channel section 111, neither directly nor indirectly Connect or contact.

In some embodiments, the end of the support rod connecting portion 520 and the end of the outer ring of the bearing 200 are directly or indirectly abutted against each other in the installation channel 110 . For example, as shown in FIG. 5 , the outer diameter of the supporting part 520 of the supporting rod is consistent with the outer diameter of the connecting part 510 of the supporting rod. The left end of the outer ring 220 is pressed against by the sleeve 530 , and the positioning of the support rod 500 can be realized when the support rod 500 is assembled.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (11)

1. A tool connection structure, characterized in that it comprises: The handle body is provided with an installation channel passing through the handle body; The transmission shaft is rotatably installed in the handle body through a bearing; The bearing is overlaid on the transmission shaft, and the transmission shaft is provided with a first limiting step and an inner ring limiting member located outside both ends of the inner ring of the bearing, and the inner ring of the bearing passes through the first The limit step and the inner ring limit member are axially limited; The outer ring of the bearing abuts against the installation channel, and the second limit step and the outer ring limit assembly for the axial limit of the outer ring of the bearing are arranged on the installation channel, and the outer ring of the bearing passes through The second limiting step and the outer ring limiting component are axially limited; The outer ring limiting assembly includes a washer and a blocking component embedded in the side wall of the installation channel, and the blocking component presses the outer ring on the second limiting step through the washer. 2. The tool connection structure according to claim 1, characterized in that: the structure of the blocking member includes a stopper located on the periphery of the transmission shaft and a cantilever connected to the stopper, and the cantilever moves along the stopper. The disks are distributed at intervals in the circumferential direction, and the ends of the cantilevers are embedded in the side walls of the installation channel. 3. The tool connection structure according to claim 2, wherein the cantilever is inclined in a direction away from the washer relative to the stop plate. 4. The tool connection structure according to claim 3, characterized in that: the cantilever has elasticity, and when it is installed in the installation channel, it shrinks along the radial direction of the installation channel, and when it is installed in place, the cantilever is outward Extend and insert into the side wall of the mounting channel. 5. The tool connection structure according to claim 1, characterized in that: the inner ring limiter is a locking sleeve, the transmission shaft is provided with an annular groove ring, and the locking sleeve is deformed under pressure Embedding in the groove ring fixes the locking sleeve in the axial direction of the transmission shaft. 6. The tool connecting structure according to any one of claims 1-5, characterized in that: A protruding ring is integrally provided on the outer ring of the bearing, and the protruding ring abuts against the second limiting step; or The end of the outer end of the bearing is in close contact with the second limiting step for limiting. 7. The tool connecting structure according to claim 6, characterized in that: a support rod is connected in the body of the handle handle, and the rear end of the support rod extends into the installation channel and is fixed to the inner wall of the installation channel connect. 8. The tool connection structure according to claim 7, characterized in that: the part where the support rod extends into the installation channel is a support rod connection part, and the outer surface of the support rod connection part is provided with a knurled structure , the inner wall of the installation channel is sealed and connected with the knurled structure by heat fusion. 9. The tool connecting structure according to claim 8, characterized in that: the part of the support rod close to the handle body outside the installation channel is a support rod support part, and the outer diameter of the support rod support part is Keep consistent with the outer diameter of the connecting part of the support rod. 10. The tool connecting structure according to claim 9, characterized in that: the end of the connecting part of the support rod and the end of the outer ring of the bearing are directly or indirectly abutted against each other in the installation channel. 11. A surgical grinding tool, characterized in that it comprises: A tool connection structure, the tool connection structure is the tool connection structure described in any one of claims 1-10; The grinding head assembly includes 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 installation channel to communicate with the transmission Shaft fixed connection; A power module, the power module is connected to the rear end of the handle body, and the power module drives the grinding head assembly to rotate through the transmission shaft.

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