Integrated reciprocating grinding head for orthopedic surgery

Abstract

The utility model relates to the technical field of medical instruments, in particular to an integrated reciprocating grinding head for orthopedic surgery, which comprises a cutter component and a power input component which are connected with each other, the power input component comprises a shell and a motor, the motor is mounted in the shell, a water injection pipe is further mounted in the shell, and the water injection pipe is tightly attached to the outer wall of the motor; the cutter assembly comprises a sharpening head, a transmission shaft and a supporting pipe, the transmission shaft penetrates through the supporting pipe and is connected with the sharpening head, the end, away from the sharpening head, of the supporting pipe is located in the shell, and a water injection channel is formed in the supporting pipe and communicates with the water injection pipe; a reciprocating driving part is connected between the transmission shaft and the rotating shaft, and the motor rotates to drive the transmission shaft to swing in a reciprocating mode through the reciprocating driving part. Due to the adoption of the integrated design, the assembly time of the cutter is shortened, the fault risk is effectively reduced, the disinfection and the operation are convenient, and the clean and sterile state of an operation area is favorably kept.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an integrated reciprocating grinding head for orthopedic surgery. Background Technology

[0002] In orthopedic surgery, grinding heads are widely used in trauma medicine, sports medicine, and spinal repair surgery to grind and shape bone. Orthopedic surgery often requires grinding and correcting overgrown or fractured bone tissue. Currently, the cutting tool and handle of orthopedic surgical grinding heads are generally designed as separate parts. Before use, the tool and handle need to be assembled and connected, and the handle is often reused, posing a risk of cross-infection. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an integrated reciprocating grinding head for orthopedic surgery, so as to at least solve the problem of cross-infection risk of existing grinding heads with separate cutting tools and handles.

[0004] This utility model solves the above-mentioned technical problems through the following technical means:

[0005] This utility model discloses an integrated reciprocating grinding head for orthopedic surgery, comprising a cutting tool assembly and a power input assembly connected to each other. The power input assembly includes a housing and a motor, with the motor installed inside the housing. A water injection pipe is also installed inside the housing, and the water injection pipe is installed close to the outer wall of the motor. The cutting tool assembly includes a grinding head, a drive shaft, and a support tube. The drive shaft passes through the support tube and is connected to the grinding head. The end of the support tube away from the grinding head is located inside the housing. The support tube has a water injection channel inside, which communicates with the water injection pipe. The drive shaft is eccentrically positioned with respect to the motor's shaft, and a reciprocating drive is connected between the drive shaft and the motor shaft. The rotation of the motor drives the drive shaft to reciprocate through the reciprocating drive.

[0006] In some embodiments, a first eccentric shaft is fixed to the power output end of the rotating shaft, and the first eccentric shaft is eccentrically disposed with respect to the rotating shaft; a second eccentric shaft is fixed to the end of the transmission shaft away from the grinding head, and the second eccentric shaft is eccentrically disposed with respect to the transmission shaft; the reciprocating drive has a second mounting hole and a first mounting hole distributed vertically, a bearing is installed in the first mounting hole, the first eccentric shaft is inserted into the bearing, and the second eccentric shaft is inserted into the second mounting hole.

[0007] In some embodiments, a mounting base is also installed inside the housing, one end of which is connected to the motor, and the end of the support tube away from the grinding head passes through the interior of the mounting base.

[0008] In some embodiments, a water injection adapter is installed on the outer wall of the support pipe inside the outer casing. One end of the water injection adapter is connected to the water injection pipe, and the other end is connected to the water injection channel inside the support pipe.

[0009] In some embodiments, the side wall of the water injection adapter has a first water injection hole communicating with the interior, the water injection pipe is inserted into the first water injection hole and communicates with the hollow interior of the water injection adapter; the support pipe has a second water injection hole, the outlet end of the water injection adapter is located at the second water injection hole, and the hollow interior of the water injection adapter communicates with the interior of the support pipe through the second water injection hole.

[0010] In some embodiments, the end of the support tube away from the grinding head has a stepped hole, the drive shaft passes through the stepped hole, the drive shaft has a sealing assembly, the sealing assembly seals one end of the stepped hole, the interior of the stepped hole has a water injection cavity, the water injection cavity communicates with a second water injection hole, and the water injection cavity communicates with a water injection channel.

[0011] In some embodiments, the sealing assembly includes a sealing sleeve, a sealing tube, and a sealing sleeve. The sealing sleeve is tightly fitted onto the drive shaft. One end of the sealing tube is fitted onto the sealing sleeve, and the other end is fitted onto the sealing sleeve. The middle outer wall of the sealing sleeve is fitted and sealed to the inner wall of the support tube.

[0012] In some embodiments, a water pipe is sleeved on the drive shaft, and the gap formed between the water pipe sleeved on the drive shaft and the support pipe constitutes a water injection channel.

[0013] In some embodiments, the water pipe includes an outlet end and a lead end, the outlet end is close to the grinding head, the opposite sides of the outlet end have flat surfaces, and the lead end is C-shaped in general.

[0014] In some embodiments, the grinding head includes an adapter shaft and a grinding blade. The grinding blade includes a base and a plurality of cutting edges, which are evenly distributed on the outer circumference of the base. The base is fixedly connected to the adapter shaft. The end of the adapter shaft away from the grinding blade is inserted into a drive shaft.

[0015] This invention relates to an integrated reciprocating grinding head for orthopedic surgery. The water injection pipe is installed close to the outer wall of the motor, allowing water to be injected into the water channel for cooling the grinding area, and also absorbing heat generated by the motor during operation. In this invention, the interconnected cutting tool assembly and power input assembly form an integrated design of the cutting tool and handle, allowing for use as a disposable surgical instrument. It is sterile packaged and discarded after use, eliminating the need for handle sterilization and reuse, thus avoiding the risk of cross-infection. Furthermore, the integrated design reduces tool assembly time, effectively lowering the risk of malfunction, facilitating sterilization and operation, and helping to maintain a clean and sterile surgical area. In this invention, the drive shaft is eccentrically positioned relative to the motor shaft. The reciprocating drive converts the unidirectional rotation of the motor shaft into a left-right reciprocating oscillating motion of the drive shaft and grinding head, improving grinding efficiency, shortening surgical time, and facilitating control of the grinding position to avoid secondary injury. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of an integrated reciprocating grinding head used in orthopedic surgery;

[0017] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0018] Figure 3 yes Figure 1 Enlarged structural diagram at point B;

[0019] Figure 4 This is a schematic diagram of the structure of an integrated reciprocating grinding head used in orthopedic surgery;

[0020] Figure 5 It is an enlarged structural schematic diagram of the motor, reciprocating drive components, and transmission shaft;

[0021] Figure 6 This is an enlarged schematic diagram of the water pipe structure;

[0022] Figure 7 This is an enlarged structural schematic diagram of the water injection transfer pipe;

[0023] The components include: outer shell 110, motor 120, rotating shaft 121, first eccentric shaft 122, mounting base 130, water injection pipe 200, water injection connector 210, water injection adapter pipe 220, first water injection hole 221, grinding head 310, adapter shaft 311, grinding blade 312, base 3121, cutting edge 3122, transmission shaft 320, second eccentric shaft 321, support pipe 330, second water injection hole 331, water pipe 340, water outlet 341, flat surface 3411, water inlet 342, reciprocating drive component 400, first mounting hole 410, bearing 411, second mounting hole 420, sealing sleeve 510, sealing pipe 520, sealing sleeve 530, and water injection cavity 001. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0025] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0026] Please refer to Figure 1-7 As shown:

[0027] The orthopedic surgical reciprocating grinding head of this application includes an interconnected cutting tool assembly and a power input assembly. The power input assembly includes a housing 110 and a motor 120. The motor 120 is installed inside the housing 110, and a water injection pipe 200 is also installed inside the housing 110, with the water injection pipe 200 mounted close to the outer wall of the motor 120. The cutting tool assembly includes a grinding head 310, a drive shaft 320, and a support tube 330. The drive shaft 320 passes through the support tube 330 and is connected to the grinding head 310. The end of the support tube 330 away from the grinding head 310 is located inside the housing 110, and the support tube 330 has a water injection channel that communicates with the water injection pipe 200. The drive shaft 320 is eccentrically positioned with respect to the rotating shaft 121 of the motor 120, and a reciprocating drive component 400 connects the drive shaft 320 and the rotating shaft 121. The rotation of the motor 120 drives the drive shaft 320 to reciprocate through the reciprocating drive component 400.

[0028] The outlet of the water injection channel is close to the grinding head 310. Water in the water injection channel is sprayed onto the grinding head 310 at the location where bone tissue is being ground, thus cooling the grinding area and improving the cooling efficiency and effect, thereby further improving the grinding quality. A water injection connector 210 is connected to the water injection pipe 200 for connection to an external water injection mechanism, enabling water to flow into the water injection pipe 200. In this application, a built-in battery can be installed in the outer casing 110 to provide power to the motor 120, or the motor 120 can be powered by connecting wires to an external power source.

[0029] In this application, the water injection pipe 200 is installed close to the outer wall of the motor 120. This allows water to be injected into the water injection channel for spraying water onto the grinding position for cooling, and also absorbs the heat generated by the motor 120 during operation. In this application, the interconnected tool assembly and power input assembly form an integrated design of the tool and handle, allowing for use as a disposable surgical instrument. It is sterile packaged and discarded after use, eliminating the need for handle sterilization and reuse, thus avoiding the risk of cross-infection. Furthermore, the integrated design reduces tool assembly time, effectively lowering the risk of malfunction, facilitating sterilization and operation, and helping to maintain a clean and sterile surgical area. In this application, the drive shaft 320 is eccentrically positioned with the rotating shaft 121 of the motor 120. The reciprocating drive component 400 converts the unidirectional rotational motion of the motor 120 into the left-right reciprocating oscillating motion of the drive shaft 320 and the grinding head 310. This improves grinding efficiency, shortens surgical time, and facilitates control of the grinding position, preventing secondary injuries.

[0030] Please refer to Figure 5 A first eccentric shaft 122 is fixed to the power output end of the rotating shaft 121 of the motor 120, and the first eccentric shaft 122 is eccentrically positioned relative to the rotating shaft 121. A second eccentric shaft 321 is fixed to the end of the transmission shaft 320 away from the grinding head 310, and the second eccentric shaft 321 is eccentrically positioned relative to the transmission shaft 320. Specifically, a connecting plate is fixed to the end of the transmission shaft 320 away from the grinding head 310, and the second eccentric shaft 321 and the transmission shaft 320 are respectively fixed on opposite sides of the connecting plate. The reciprocating drive component 400 has a second mounting hole 420 and a first mounting hole 410 distributed vertically. A bearing 411 is installed in the first mounting hole 410, the first eccentric shaft 122 is inserted into the bearing 411, and the second eccentric shaft 321 is inserted into the second mounting hole 420.

[0031] The housing 110 also houses a mounting base 130, one end of which is connected to the motor 120. The end of the support tube 330 away from the grinding head 310 passes through the interior of the mounting base 130. The reciprocating drive 400 is located inside one end of the mounting base 130.

[0032] A water injection adapter 220 is installed on the outer wall of the support pipe 330 inside the outer casing 110. One end of the water injection adapter 220 is connected to the water injection pipe 200, and the other end is connected to the water injection channel inside the support pipe 330. Please refer to... Figure 7 The water injection adapter 220 has a first water injection hole 221 on its side wall, which communicates with the interior. The water injection pipe 200 is inserted into the first water injection hole 221 and communicates with the hollow interior of the water injection adapter 220. The support pipe 330 has a second water injection hole 331. The outlet end of the water injection adapter 220 is installed at the second water injection hole 331, and the hollow interior of the water injection adapter 220 communicates with the interior of the support pipe 330 through the second water injection hole 331.

[0033] The support tube 330 has a stepped hole at the end away from the grinding head 310. The drive shaft 320 passes through the stepped hole and has a sealing assembly on it. The sealing assembly seals one end of the stepped hole. The interior of the stepped hole has a water injection chamber 001, which communicates with the second water injection hole 331 and the water injection channel. The sealing assembly includes a sealing sleeve 510, a sealing tube 520, and a plugging sleeve 530. The sealing sleeve 510 is tightly fitted onto the drive shaft 320. One end of the sealing tube 520 is fitted onto the sealing sleeve 510, and the other end is fitted onto the plugging sleeve 530. The middle outer wall of a portion of the sealing tube 520 is fitted and sealed against the inner wall of the support tube 330, and the middle outer wall of the plugging sleeve 530 is fitted and sealed against the inner wall of the support tube 330. One end of the stepped hole is sealed by a sealing component to form a closed water injection chamber 001 inside the stepped hole, preventing the injected water from flowing to the motor 120 and affecting the use of the motor 120.

[0034] A water pipe 340 is sleeved on the drive shaft 320 inside the support pipe 330. The gap between the water pipe 340 and the drive shaft 320 forms a water injection channel. Please refer to... Figure 6 The water pipe 340 includes an outlet end 341 and a lead end 342. The outlet end 341 is close to the grinding head 310, and both sides of the outlet end 341 have flat surfaces 3411. The lead end 342 is C-shaped. There is a first unobstructed gap between the C-shaped lead end 342 and the inner wall of the support pipe 330. There is also a second gap between the outlet end 341 with flat surfaces 2411 and the inner wall of the support pipe 330. The first gap and the second gap are interconnected, forming a water injection channel. That is, the water in the water injection chamber 001 enters the outlet end 341 through the lead end 342 and is finally sprayed onto the grinding position.

[0035] Please refer to Figure 2The grinding head 310 includes a connecting shaft 311 and a grinding blade 312. The grinding blade 312 includes a base 3121 and multiple cutting edges 3122, which are evenly distributed on the outer circumference of the base 3121. The base 3121 is fixedly connected to the connecting shaft 311. The end of the connecting shaft 311 away from the grinding blade 312 is inserted into a drive shaft 320. The reciprocating oscillation of the drive shaft 320 will drive the grinding blade 312 to reciprocate.

[0036] The aforementioned integrated reciprocating grinding head for orthopedic surgery uses a water injection pipe 200. Water from the water injection pipe 200 flows through the water injection adapter 220 into the water injection chamber 001 within the support pipe 330, then flows into the water injection channel. It is sprayed from the end of the support pipe 330 near the grinding head towards the grinding position to cool the grinding area. The motor 120 is started, and its rotating shaft 121 rotates in one direction. Driven by the first eccentric shaft 122 and the reciprocating drive component 400, this rotation is converted into a reciprocating oscillation of the transmission shaft 320, which in turn drives the grinding head to perform a reciprocating oscillation motion, thereby grinding bone tissue and improving grinding efficiency.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. An integrated reciprocating burr head for orthopedic surgery, characterized in that, It includes an interconnected tool assembly and a power input assembly. The power input assembly includes a housing and a motor. The motor is installed inside the housing. A water injection pipe is also installed inside the housing and is installed close to the outer wall of the motor. The tool assembly includes a sharpening head, a drive shaft, and a support tube. The drive shaft passes through the support tube and is connected to the sharpening head. The end of the support tube away from the sharpening head is located inside the housing. The support tube has a water injection channel inside, which is connected to a water injection pipe. The drive shaft is eccentrically positioned to the motor shaft, and a reciprocating drive is connected between the drive shaft and the motor shaft. The rotation of the motor drives the drive shaft to oscillate back and forth through the reciprocating drive.

2. The integrated reciprocating grinding head for orthopedic surgery according to claim 1, characterized in that, The power output end of the rotating shaft is fixed with a first eccentric shaft, which is eccentrically positioned relative to the rotating shaft; the end of the transmission shaft away from the grinding head is fixed with a second eccentric shaft, which is eccentrically positioned relative to the transmission shaft; the reciprocating drive component has a second mounting hole and a first mounting hole distributed vertically, a bearing is installed in the first mounting hole, the first eccentric shaft is inserted into the bearing, and the second eccentric shaft is inserted into the second mounting hole.

3. The integrated reciprocating grinding head for orthopedic surgery according to claim 1, characterized in that, The housing also has a mounting base installed inside, one end of which is connected to the motor, and the end of the support tube away from the grinding head passes through the interior of the mounting base.

4. The integrated reciprocating grinding head for orthopedic surgery according to claim 1, characterized in that, A water injection adapter is installed inside the outer shell on the outer wall of the support pipe. One end of the water injection adapter is connected to the water injection pipe, and the other end is connected to the water injection channel inside the support pipe.

5. The integrated reciprocating grinding head for orthopedic surgery according to claim 4, characterized in that, The side wall of the water injection adapter has a first water injection hole that communicates with the interior. The water injection pipe is inserted into the first water injection hole and communicates with the hollow interior of the water injection adapter. The support pipe has a second water injection hole. The outlet end of the water injection adapter is located at the second water injection hole. The hollow interior of the water injection adapter communicates with the interior of the support pipe through the second water injection hole.

6. The integrated reciprocating grinding head for orthopedic surgery according to claim 5, characterized in that, The support tube has a stepped hole at the end away from the grinding head. The drive shaft passes through the stepped hole and has a sealing assembly on it. The sealing assembly seals one end of the stepped hole. The interior of the stepped hole has a water injection chamber, which communicates with a second water injection hole and a water injection channel.

7. The integrated reciprocating grinding head for orthopedic surgery according to claim 6, characterized in that, The sealing assembly includes a sealing sleeve, a sealing tube, and a sealing sleeve. The sealing sleeve is tightly fitted onto the drive shaft. One end of the sealing tube is fitted onto the sealing sleeve, and the other end is fitted onto the sealing sleeve. The middle outer wall of the sealing sleeve is fitted and sealed to the inner wall of the support tube.

8. The integrated reciprocating grinding head for orthopedic surgery according to claim 1, characterized in that, A water pipe is fitted onto the drive shaft, and the gap between the water pipe fitted onto the drive shaft and the support pipe forms a water injection channel.

9. The integrated reciprocating grinding head for orthopedic surgery according to claim 8, characterized in that, The water pipe includes an outlet end and a water inlet end. The outlet end is close to the grinding head, and both sides of the outlet end have flat surfaces. The water inlet end is C-shaped in general.

10. The integrated reciprocating grinding head for orthopedic surgery according to any one of claims 1-9, characterized in that, The grinding head includes an adapter shaft and a grinding blade. The grinding blade includes a base and multiple cutting edges. The multiple cutting edges are evenly distributed on the outer circumference of the base. The base is fixedly connected to the adapter shaft. The end of the adapter shaft away from the grinding blade is inserted into a drive shaft.

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