Reciprocating knife sharpener for operation

Abstract

The utility model relates to the technical field of orthopedic surgical instruments, in particular to a reciprocating grinding knife for surgery, which comprises a knife head and a driving conversion component, the driving conversion component comprises a transmission shaft, an input shaft and an adapter, a first eccentric column is fixed on the transmission shaft, the adapter comprises a shifting fork and a conversion connecting rod, and the first eccentric column is mounted at one end of the conversion connecting rod. One fork tip of the shifting fork is connected with the other end of the conversion connecting rod, a first bearing is installed in a fork opening of the shifting fork, a second eccentric column is fixed to one end of the input shaft, the second eccentric column and the input shaft are eccentrically arranged, and the second eccentric column is inserted into the first bearing. The shifting fork is matched with the first bearing and the conversion connecting rod to convert one-way rotating motion of the input shaft into reciprocating rotating motion of the transmission shaft. According to the reciprocating grinding knife for the operation, the knife head rotating in the reciprocating mode grinds bone tissue, stress is even, a ground wound surface is neat and stable, the grinding knife is more stable when the bone tissue is processed, the grinding effect is effectively improved, and wound recovery is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic surgical instruments, in particular to a reciprocating knife sharpener for surgery. Background Art

[0002] In orthopedic surgery, sharpeners are often used to grind the surgical site of the bone. Existing sharpeners used in orthopedic surgery usually use the unidirectional rotation of the blade to grind the bone tissue. The unidirectional rotation of the blade causes a large instantaneous grinding amount on the bone tissue, resulting in a large wound surface and slow bone tissue recovery. In addition, the unidirectional rotation of the blade may injure the soft tissue in the non-treated area, or the soft tissue in the non-treated area may be entangled on the unidirectional rotation of the blade, resulting in secondary injury. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a reciprocating knife sharpener for surgery, so as to at least solve the problem that the existing unidirectional rotating knife head has a large instantaneous grinding amount on bone tissue, a large wound surface, and may injure soft tissue in non-treated areas, causing secondary injuries.

[0004] The utility model solves the above technical problems through the following technical means:

[0005] The utility model discloses a surgical reciprocating knife sharpener, comprising a knife head and a drive conversion assembly for driving the knife head to perform reciprocating rotational motion, the drive conversion assembly comprising a transmission shaft, an input shaft and an adapter, one end of the transmission shaft is connected to the knife head, and a first eccentric column is fixed on the other end, the adapter comprises a shift fork and a conversion connecting rod, the first eccentric column is installed at one end of the conversion connecting rod, a fork tip of the shift fork is connected to the other end of the conversion connecting rod, a first bearing is installed in the fork mouth of the shift fork, a second eccentric column is fixed at one end of the input shaft, the second eccentric column is eccentrically arranged with the input shaft, the second eccentric column is inserted in the first bearing, the shift fork cooperates with the first bearing and the conversion connecting rod to convert the unidirectional rotational motion of the input shaft into the reciprocating rotational motion of the transmission shaft.

[0006] In some embodiments, the reciprocating knife sharpener further comprises a housing, the transmission shaft is passed through the housing, a pin is inserted into the housing, and the shift fork is rotatably mounted on the pin.

[0007] In some embodiments, both opposite ends of the conversion link have plug-in holes, a connecting column is fixed on one fork tip of the shift fork, the connecting column is plugged into one plug-in hole, and the first eccentric column is plugged into the other plug-in hole.

[0008] In some embodiments, the transmission shaft and the input shaft are coaxially arranged.

[0009] In some embodiments, the reciprocating grinding tool further includes an interface housing and a housing sleeve. The input shaft is disposed through the interface housing. One end of the housing sleeve is sleeved on the outer housing, and the other end is sleeved on the interface housing.

[0010] In some embodiments, a second bearing is installed in the interface housing. The second bearing is sleeved on one end of the input shaft close to the second eccentric column.

[0011] In some embodiments, an outer cutter tube is sleeved on the transmission shaft. One end of the outer cutter tube away from the cutter head is inserted into the outer housing.

[0012] For the reciprocating grinding tool for surgery of the present utility model, the input shaft rotates unidirectionally driven by an external motor, so that the second eccentric column makes an eccentric rotation. With the cooperation of the first bearing, the fork swings back and forth in the circumferential direction, driving the conversion link to swing back and forth. Then, under the action of the first eccentric column, the transmission shaft makes a reciprocating rotational motion, and further drives the cutter head to make a reciprocating rotational motion to grind bone tissue. The cutter head making a reciprocating rotational motion to grind bone tissue is beneficial to uniform force application, the grinding wound surface is neat and stable, the treatment of bone tissue is more stable, the grinding effect is effectively improved, and the wound recovery is facilitated. Description of the Drawings

[0013] Figure 1 is a cross-sectional view of the reciprocating grinding tool for surgery of the present utility model;

[0014] Figure 2 is Figure 1 the enlarged structural view at A in

[0015] Figure 3 is a structural schematic diagram of the reciprocating grinding tool for surgery of the present utility model;

[0016] Figure 4 is the enlarged structural schematic diagram of the adapter, the transmission shaft and the input shaft;

[0017] Figure 5 is the assembled structural schematic diagram of the adapter and the transmission shaft;

[0018] Among them, the cutter head 100, the cutter handle 110,

[0019] the transmission shaft 210, the first eccentric column 211, the connection hole 212, the input shaft 220, the second eccentric column 221, the fork 230, the mounting hole 231, the connection column 232, the conversion link 240, the insertion hole 241, the first bearing 250, the pin shaft 260, the second bearing 270, the outer housing 310, the interface housing 320, the housing sleeve 330, the outer cutter tube 410, the support tube 420. Detailed Embodiments

[0020] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0021] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] Please refer to Figures 1-5 The surgical reciprocating sharpener of the utility model comprises a cutter head 100 and a drive conversion assembly for driving the cutter head 100 to perform reciprocating rotational motion, the drive conversion assembly comprising a transmission shaft 210, an input shaft 220 and an adapter, one end of the transmission shaft 210 is connected to the cutter head 100, and a first eccentric column 211 is fixed on the other end, the adapter comprises a shift fork 230 and a conversion connecting rod 240, the first eccentric column 211 is installed at one end of the conversion connecting rod 240, a fork tip of the shift fork 230 is connected to the other end of the conversion connecting rod 240, a first bearing 250 is installed in the fork of the shift fork 230, a second eccentric column 221 is fixed at one end of the input shaft 220, the second eccentric column 221 is eccentrically arranged with the input shaft 220, and the second eccentric column 221 is inserted in the first bearing 250, the shift fork 230 cooperates with the first bearing 250 and the conversion connecting rod 240 to convert the unidirectional rotational motion of the input shaft 220 into the reciprocating rotational motion of the transmission shaft 210.

[0023] For the reciprocating grinding tool for surgery adopting the above technical solution, one end of the input shaft 220 away from the second eccentric column 221 is connected to the rotating shaft of an external motor. When the external motor is started, the input shaft 220 rotates unidirectionally under the drive of the external motor, causing the second eccentric column 221 to perform eccentric rotation. With the cooperation of the first bearing 250, the fork 230 swings back and forth in the circumferential direction, driving the conversion link 240 to swing back and forth. Then, under the action of the first eccentric column 211, the transmission shaft 210 performs a reciprocating rotational motion, and further drives the tool head 100 to perform a reciprocating rotational motion to grind bone tissue. Performing a reciprocating rotational motion to grind bone tissue is beneficial to uniform force application, with a neat and stable grinding wound surface, smoother handling of bone tissue during processing, effectively improving the grinding effect, and facilitating wound recovery. In the present utility model, the reciprocating rotational motion refers to the transmission shaft 210 or the tool head 100 rotating a certain angle in the positive direction, then rotating a certain angle in the reverse direction, and then rotating a certain angle in the positive direction... and so on, rotating back and forth in a cycle.

[0024] In this embodiment, the tool head 100 has a tool handle 110, and one end of the transmission shaft 210 close to the tool head 100 has a connection hole 212. The tool handle 110 is fixedly inserted into the connection hole 212 to achieve the fixed connection between the transmission shaft 210 and the tool head 100.

[0025] In this embodiment, the reciprocating grinding tool further includes a housing 310. The transmission shaft 210 is arranged inside the housing 310. A pin shaft 260 is inserted into the housing 310, and the fork 230 is rotatably mounted on the pin shaft 260. Specifically, the top of the fork opening of the fork 230 has a mounting hole 231, and the pin shaft 260 is inserted into the mounting hole 231 to achieve the rotational mounting of the fork 230 on the pin shaft 260.

[0026] In this embodiment, both opposite ends of the conversion link 240 have insertion holes 241. A connecting column 232 is fixed on one fork tip of the fork 230, and the connecting column 232 is inserted into one insertion hole 241, and the first eccentric column 211 is inserted into the other insertion hole 241. So that when the fork 230 swings back and forth in the circumferential direction, it can drive the conversion link 240 to swing back and forth at the same time. Then, under the action of the first eccentric column 211, the transmission shaft 210 is driven to perform a reciprocating rotational motion.

[0027] In this embodiment, the transmission shaft 210 and the input shaft 220 are coaxially arranged.

[0028] In this embodiment, the reciprocating grinding tool further includes an interface housing 320 and a housing sleeve 330. The input shaft 220 is arranged inside the interface housing 320. One end of the housing sleeve 330 is sleeved on the housing 310, and the other end is sleeved on the interface housing 320. To make the rotation of the input shaft 220 more stable, a second bearing 270 is installed inside the interface housing 320, and the second bearing 270 is sleeved on one end of the input shaft 220 close to the second eccentric column 221.

[0029] In this embodiment, in order to strengthen the rigidity of the transmission shaft 210 and protect the transmission shaft 210, an outer cutter tube 410 is sleeved on the transmission shaft 210, and one end of the outer cutter tube 410 away from the cutter head 100 is inserted into the housing 310. A support tube 420 is also sleeved on one end of the transmission shaft 210 close to the cutter head 100, and one end of the support tube 420 away from the cutter head 100 is inserted into the outer cutter tube 410.

[0030] One end of the input shaft 220 away from the second eccentric column 221 is connected to the rotating shaft of an external motor. When the external motor is started, the input shaft 220 rotates in one direction, driving the second eccentric column 221 to perform eccentric rotation. The second eccentric column 221 is inserted into the first bearing 250, enabling the first bearing 250 to slide and fit within the fork opening of the fork 230, driving the fork 230 to swing back and forth in the circumferential direction. One fork tip of the fork 230 is connected to the conversion link 240, driving the conversion link 240 to swing reciprocally. The first eccentric column 211 is inserted into the conversion link 240, causing the transmission shaft 210 to perform reciprocating rotational motion and transmitting it to the cutter head 100, causing the cutter head 100 to also perform reciprocating rotational motion to grind bone tissue.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A reciprocating knife sharpener for surgery, characterized in that: The invention comprises a drive conversion assembly for driving a cutter head and the cutter head to make reciprocating rotational motion, the drive conversion assembly comprises a transmission shaft, an input shaft and an adapter, one end of the transmission shaft is connected to the cutter head, and a first eccentric column is fixed on the other end, the adapter comprises a shift fork and a conversion connecting rod, the first eccentric column is installed at one end of the conversion connecting rod, a fork tip of the shift fork is connected to the other end of the conversion connecting rod, a first bearing is installed in the fork mouth of the shift fork, a second eccentric column is fixed at one end of the input shaft, the second eccentric column is eccentrically arranged with respect to the input shaft, the second eccentric column is inserted in the first bearing, the shift fork cooperates with the first bearing and the conversion connecting rod to convert the unidirectional rotational motion of the input shaft into the reciprocating rotational motion of the transmission shaft.

2. The surgical reciprocating sharpener according to claim 1, characterized in that: The reciprocating knife sharpener also includes a shell, the transmission shaft is inserted into the shell, a pin is inserted into the shell, and the shift fork is rotatably mounted on the pin.

3. The surgical reciprocating sharpener according to claim 2, characterized in that: The conversion connecting rod has plugging holes at both opposite ends, a connecting column is fixed on one fork tip of the shift fork, the connecting column is plugged into one plugging hole, and the first eccentric column is plugged into the other plugging hole.

4. The surgical reciprocating sharpener according to claim 3, characterized in that: The transmission shaft and the input shaft are coaxially arranged.

5. The surgical reciprocating sharpener according to claim 4, characterized in that: The reciprocating knife sharpener further comprises an interface shell and a shell sleeve, the input shaft is inserted into the interface shell, one end of the shell sleeve is sleeved on the outer shell, and the other end is sleeved on the interface shell.

6. The surgical reciprocating sharpener according to claim 5, characterized in that: A second bearing is installed in the interface housing, and the second bearing is sleeved on one end of the input shaft close to the second eccentric column.

7. The surgical reciprocating sharpener according to claim 6, characterized in that: An outer knife tube is sleeved on the transmission shaft, and one end of the outer knife tube away from the knife head is plugged into the outer shell.

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