Reciprocating driving structure for surgical knife and surgical knife

Abstract

The utility model relates to the technical field of medical instruments, in particular to a reciprocating driving structure for a surgical knife and the surgical knife, the reciprocating driving structure comprises an eccentric rocker, an eccentric shaft and a reciprocating conversion connecting rod, the eccentric rocker comprises a first connecting rod and a first eccentric rod which are eccentrically arranged, and the eccentric shaft is in transmission connection with a driving motor; the eccentric shaft comprises a second connecting rod and a second eccentric rod which are eccentrically arranged. The eccentric rocker and the eccentric shaft are both installed on the reciprocating conversion connecting rod, the first connecting rod and the second connecting rod are located on the two opposite sides of the reciprocating conversion connecting rod respectively, and the eccentric shaft rotates unidirectionally to drive the reciprocating conversion connecting rod to rotate to drive the eccentric rocker to rotate in a reciprocating mode. According to the reciprocating driving structure, under the driving of the driving motor, one-way rotation of the second connecting rod can be converted into reciprocating rotation of the first connecting rod through mutual matching of the eccentric shaft, the reciprocating conversion connecting rod and the eccentric rocker, reciprocating rotation of the cutter assembly is effectively achieved, and operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a reciprocating drive structure for surgical tools and a surgical tool. Background Art

[0002] With the progress of medical technology, the application of minimally invasive technology is becoming more and more extensive. Minimally invasive technology is a technology that achieves the best surgical efficacy with the least invasion and physiological interference, and has the advantages of small surgical incisions, short recovery time and few complications. When orthopedic doctors perform surgical treatments on orthopedic patients, they usually need to use tools that make reciprocating motions, such as bone drills, grinders, etc., to achieve purposes such as drilling and grinding by making reciprocating motions, and improve the surgical operation efficiency.

[0003] However, in existing reciprocating drive surgical tools, the reciprocating conversion mechanism is usually arranged at the interface end, resulting in a longer cutter head transmission rod. Due to market demand, the diameter of the tool rod cannot be too large. When the reciprocating conversion mechanism is close to the input shaft, that is, close to the interface and far from the cutter head, since the driving shaft of the cutter head is long and has a small diameter, the small stiffness of the driving shaft will cause the cutter head to rotate incompletely during work, resulting in a reduction in work efficiency. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a reciprocating drive structure for surgical tools and a surgical tool, so as to at least solve the problem that in existing reciprocating drive surgical tools, when the reciprocating conversion mechanism is close to the input shaft, that is, close to the interface and far from the cutter head, the small stiffness of the driving shaft causes the cutter head to rotate incompletely during work, resulting in a reduction in work efficiency.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In the first aspect, the utility model provides a reciprocating drive structure for surgical tools, which is used to connect with a tool assembly and drive the tool assembly to reciprocate and rotate. The reciprocating drive structure includes:

[0007] An eccentric rocker, fixedly connected to the tool assembly and driving the tool assembly to reciprocate and rotate. The eccentric rocker includes a first connecting rod and a first eccentric rod fixedly connected, and the first connecting rod and the first eccentric rod are eccentrically arranged;

[0008] An eccentric shaft, drivingly connected to a driving motor. The eccentric shaft includes a second connecting rod and a second eccentric rod fixedly connected, and the second connecting rod and the second eccentric rod are eccentrically arranged. The second connecting rod is drivingly connected to the rotating shaft of the driving motor;

[0009] A reciprocating conversion connecting rod, the eccentric rocker and the eccentric shaft are both installed on the reciprocating conversion connecting rod, and the first connecting rod and the second connecting rod are respectively located on opposite sides of the reciprocating conversion connecting rod. The unidirectional rotation of the eccentric shaft drives the reciprocating conversion connecting rod to rotate and drives the eccentric rocker to make a reciprocating rotation.

[0010] For the reciprocating drive structure of the surgical tool adopting the above technical solution, under the rotation of the drive motor, the transmission rotating shaft rotates, and then drives the eccentric shaft to rotate, drives the second eccentric rod to make an eccentric rotation, drives the reciprocating conversion connecting rod to rotate, the reciprocating conversion connecting rod drives the first eccentric rod to rotate, and then drives the first connecting rod to make a reciprocating rotation. The first connecting rod is connected to the tool assembly, and the tool assembly follows the first connecting rod to make a reciprocating rotation. The reciprocating drive structure of the present invention can install the reciprocating conversion connecting rod at a position close to the tool assembly, directly transmit the reciprocating rotation of the first connecting rod to the tool assembly, so that the tool assembly also makes a reciprocating rotation, improving the surgical efficiency.

[0011] Combined with the first aspect, in some embodiments, the second connecting rod is connected with a transmission rotating shaft, and the transmission rotating shaft is connected with the rotating shaft of the drive motor.

[0012] Combined with the first aspect, in some embodiments, the reciprocating drive structure further includes a tool head seat. The first connecting rod is inserted into the tool head seat and can reciprocate and rotate in the tool head seat while keeping the axis unchanged. The first eccentric rod is located outside the tool head seat.

[0013] Combined with the first aspect, in some embodiments, a first support tube is sleeved on one end of the first connecting rod close to the tool assembly, and one end of the first support tube is inserted into the tool head seat.

[0014] Combined with the first aspect, in some embodiments, a bearing seat is arranged on the outside of the eccentric shaft, a first bearing is installed on the second connecting rod, and the first bearing is installed in the bearing seat.

[0015] In the second aspect, the present invention further provides a surgical tool, including the reciprocating drive structure described in the first aspect and a tool assembly, and the tool assembly is fixedly connected with the eccentric rocker.

[0016] Combined with the second aspect, in some embodiments, the surgical tool further includes a water injection pipe. The water injection pipe is inserted into the tool head seat, and the water outlet end of the water injection pipe is located on the end face of the tool head seat facing the tool assembly.

[0017] In combination with the second aspect, in some embodiments, the surgical tool further includes an adapter sleeve assembly, a second support tube, and a spiral water cooling sleeve. One end of the second support tube is connected to the tool head seat, and the other end is connected to the adapter sleeve assembly. The spiral water cooling sleeve is located inside the adapter sleeve assembly. A spiral channel is provided on the outer wall of the spiral water cooling sleeve, and the spiral channel is communicated with a water injection pipe. The water injection pipe is arranged inside the second support tube.

[0018] In combination with the second aspect, in some embodiments, the adapter sleeve assembly includes a transfer pipe and a housing. The housing is mounted on the transfer pipe. The spiral water cooling sleeve is located inside the housing. The spiral channel on the outer wall of the spiral water cooling sleeve and the inner wall of the housing form part of the water injection channel. The transmission rotating shaft is arranged inside the transfer pipe.

[0019] For the surgical tool of the present utility model, during the operation, water can be injected into the spiral channel on the outer wall of the spiral water cooling sleeve, enter the water injection pipe through the connection hole on the front housing, and flow out from the end face of the tool head seat through the water injection pipe, so as to realize the flushing, cooling, and temperature reduction of the tool assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of the reciprocating drive structure for the surgical tool of Embodiment 1;

[0021] Figure 2 is a structural schematic diagram of the eccentric rocker, the reciprocating conversion link, and the eccentric shaft;

[0022] Figure 3 is a cross-section of the surgical tool of Embodiment 2 Figure 1 ;

[0023] Figure 4 is Figure 3 an enlarged view of part A in

[0024] Figure 5 is a structural schematic diagram of the surgical tool of Embodiment 2;

[0025] Figure 6 is a cross-section of the surgical tool of Embodiment 2 Figure 2 ;

[0026] Among them, the eccentric rocker 100, the first connecting rod 110, the first eccentric rod 120, the eccentric shaft 200, the second connecting rod 210, the second eccentric rod 220, the transmission rotating shaft 230, the reciprocating conversion link 300, the insertion hole 310, the input shaft 400, the tool head seat 510, the first support tube 520, the bearing seat 530, the first bearing 540, the water injection pipe 600, the adapter sleeve assembly 710, the transfer pipe 711, the front housing 712, the connection hole 7120, the rear housing 713, the second support tube 720, the spiral water cooling sleeve 730, the spiral channel 731, the second bearing 800, the tool assembly 001. Specific Embodiments

[0027] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Embodiment 1

[0030] Please refer to Figure 1 - Figure 2 , the reciprocating drive structure for a surgical tool in this embodiment is used to connect with the tool assembly 001 and drive the tool assembly 001 to rotate reciprocally. The reciprocating drive structure in this embodiment includes an eccentric rocker 100, an eccentric shaft 200, and a reciprocating conversion link 300. The eccentric rocker 100 is fixedly connected to the tool assembly 001 and drives the tool assembly 001 to rotate reciprocally. The eccentric rocker 100 includes a first connecting rod 110 and a first eccentric rod 120 fixedly connected, and the first connecting rod 110 and the first eccentric rod 120 are eccentrically arranged. The eccentric shaft 200 is in transmission connection with the driving motor. The eccentric shaft 200 includes a second connecting rod 210 and a second eccentric rod 220 fixedly connected, and the second connecting rod 210 and the second eccentric rod 220 are eccentrically arranged. The second connecting rod 210 is in transmission connection with the rotating shaft of the driving motor. Both the eccentric rocker 100 and the eccentric shaft 200 are installed on the reciprocating conversion link 300, and the first connecting rod 110 and the second connecting rod 210 are respectively located on opposite sides of the reciprocating conversion link 300. The unidirectional rotation of the eccentric shaft 200 drives the reciprocating conversion link 300 to rotate and drives the eccentric rocker 100 to rotate reciprocally.

[0031] In the present utility model, the first connecting rod 110 rotates reciprocally, driving the tool assembly 001 connected to the first connecting rod 110 to rotate reciprocally. Herein, the reciprocal rotation refers to that after the tool assembly 001 or the first connecting rod 110 rotates a certain angle around its own axis, it rotates in the reverse direction by a certain angle, then rotates in the reverse direction by a certain angle again, and so on in a cyclic and repeated manner.

[0032] In this embodiment, when the eccentric rocker 100 and the eccentric shaft 200 are both installed on the reciprocating conversion link 300, the axis lines of the first connecting rod 110 and the second connecting rod 210 are parallel to each other and do not coincide. The reciprocating conversion link 300 connected to the eccentric rocker 100 and the eccentric shaft 200 simultaneously has two insertion holes 310, and the two insertion holes 310 are respectively located at the opposite ends of the reciprocating conversion link 300, and are respectively used for inserting the first eccentric rod 120 and the second eccentric rod 220. By inserting the first eccentric rod 120 and the second eccentric rod 220 into the corresponding insertion holes 310 respectively, the eccentric rocker 100 and the eccentric shaft 200 are both installed on the reciprocating conversion link 300. Of course, the connection manner between the eccentric rocker 100 and the eccentric shaft 200 and the reciprocating conversion link 300 can also be selected in other ways, as long as it can realize that the unidirectional rotation of the eccentric shaft 200 drives the reciprocating conversion link 300 to rotate and drives the eccentric rocker 100 to rotate reciprocally.

[0033] In this embodiment, the reciprocating conversion link 300 has a simple structure, and the connection and cooperation structure between it and the eccentric rocker 100 and the eccentric shaft 200 is also simple. The reciprocating conversion link 300 can be installed at a position close to the tool assembly 001, and the first connecting rod 110 in the eccentric rocker 100 is directly connected to the tool assembly 001, so as to shorten the distance of the reciprocal rotation transmission on the first connecting rod 110, directly transmit the reciprocal rotation on the first connecting rod 110 to the tool assembly 001, and more effectively realize the reciprocal rotation of the tool assembly 001.

[0034] In this embodiment, the second connecting rod 210 is connected with a transmission rotating shaft 230, and the transmission rotating shaft 230 is in transmission connection with the rotating shaft of the driving motor. Specifically, the transmission rotating shaft 230 is a hollow tubular structure, the second connecting rod 210 is fixedly inserted at one end of the transmission rotating shaft 230, and an input shaft 400 is connected to the end of the transmission rotating shaft 230 far from the eccentric shaft 200. The input shaft 400 is connected to the rotating shaft of the driving motor through a coupling. When the driving motor rotates, it drives the input shaft 400 to rotate, and then drives the transmission rotating shaft 230 to rotate. The rotation of the transmission rotating shaft 230 drives the eccentric shaft 200 to rotate.

[0035] In this embodiment, the first connecting rod 110 is fixedly connected to the tool assembly 001. The specific connection method between the first connecting rod 110 and the tool assembly 001 is not limited in this embodiment. As long as the first connecting rod 110 can be fixedly connected to the tool assembly 001 and the first connecting rod 110 can drive the tool assembly 001 to rotate reciprocally, the connecting rod of the tool assembly 001 can be fixedly inserted on the first connecting rod 110, or the connecting rod of the tool assembly 001 can be sleeved on the first connecting rod 110.

[0036] In this embodiment, the reciprocating drive structure further includes a tool head seat 510. The first connecting rod 110 is inserted into the tool head seat 510 and can rotate reciprocally in the tool head seat 510 while keeping the axis unchanged. The first eccentric rod 120 is located outside the tool head seat 510. Specifically, the tool head seat 510 has a through hole. The first connecting rod 110 is inserted into the through hole. One end of the first connecting rod 110 passes through the tool head seat 510 for connecting the tool assembly 001, and the other end passes through the tool head seat 510 for connecting the first eccentric rod 120. A first support tube 520 is sleeved on the end of the first connecting rod 110 close to the tool assembly 001, and one end of the first support tube 520 is inserted into the tool head seat 510.

[0037] In this embodiment, a bearing seat 530 is arranged on the outer side of the eccentric shaft 200, and a first bearing 540 is installed on the second connecting rod 210. The first bearing 540 is installed in the bearing seat 530.

[0038] Under the rotation of the drive motor, the input shaft 400 rotates to drive the transmission rotating shaft 230 to rotate, and then drives the eccentric shaft 200 to rotate, drives the second eccentric rod 220 to perform eccentric rotation, drives the reciprocating conversion link 300 to rotate, the reciprocating conversion link 300 drives the first eccentric rod 120 to rotate, and then drives the first connecting rod 110 to perform reciprocating rotation. The first connecting rod 110 is connected to the tool assembly 001, and the tool assembly 001 follows the first connecting rod 110 to perform reciprocating rotation.

[0039] Embodiment 2

[0040] The surgical tool in this embodiment is mainly an orthopedic tool, which is used to perform operations such as drilling and grinding on bones or tissues. Please refer to Figure 3 - Figure 6 The surgical tool in this embodiment includes the reciprocating drive structure and the tool assembly 001 in Embodiment 1. The tool assembly 001 is fixedly connected to the first connecting rod 110 in the eccentric rocker 100. The surgical tool in this embodiment further includes a water injection pipe 600. The water injection pipe 600 is inserted into the tool head seat 510, and the water outlet end of the water injection pipe 600 is located on the end face of the tool head seat 510 facing the tool assembly 001. By injecting water into the water injection pipe 600, the operating tool assembly 001 can be flushed and cooled, which is beneficial to improving the surgical efficiency to a certain extent.

[0041] The surgical tool further includes an adapter sleeve assembly 710, a second support tube 720, and a spiral water-cooling sleeve 730. One end of the second support tube 720 is connected to the tool head seat 510, and the other end is connected to the adapter sleeve assembly 710. The spiral water-cooling sleeve 730 is located inside the adapter sleeve assembly 710. A spiral channel 731 is provided on the outer wall of the spiral water-cooling sleeve 730, and the spiral channel 731 communicates with the water injection pipe 600. The water injection pipe 600 is disposed inside the second support tube 720.

[0042] In this embodiment, the adapter sleeve assembly 710 includes an adapter pipe 711 and a housing, and the housing is mounted on the adapter pipe 711. One end of the second support tube 720 is sleeved on the adapter pipe 711, and the other end is sleeved on the tool head seat 510. The bearing seat 530 is mounted inside the second support tube 720. The spiral water-cooling sleeve 730 is located inside the housing. The spiral channel 731 on the outer wall of the spiral water-cooling sleeve 730 and the inner wall of the housing form part of the water injection channel. The transmission rotating shaft 230 is disposed inside the adapter pipe 711. Specifically, the housing includes a front housing 712 and a rear housing 713. One end of the front housing 712 is inserted into the rear housing 713, and one end of the rear housing 713 is clamped on the outer wall of the front housing 712. The rear housing 713 is sleeved on the spiral water-cooling sleeve 730. The front housing 712 has a connection hole 7120 at a position corresponding to the outlet end of the spiral channel 731. The inlet end of the water injection pipe 600 is inserted into the connection hole 7120 and communicates with the spiral channel 731. A second bearing 800 is mounted on the input shaft 400, and the second bearing 800 is located inside the adapter pipe 711.

[0043] The surgical tool of this embodiment can form a grinding tool by connecting a grinding tool assembly 001 to the first connecting rod 110, or can form a drilling tool by connecting a drilling tool assembly 001 to the first connecting rod 110. The surgical tool of this embodiment can, under the interaction of the eccentric shaft 200, the reciprocating conversion link 300, and the eccentric rocker 100, achieve the reciprocating rotation of the first connecting rod 110, and further achieve the reciprocating rotation of the tool assembly 001, and further achieve operations such as grinding and drilling of bones and tissues. The first connecting rod 110 is directly connected to the tool assembly 001, and the reciprocating conversion link 300 can be installed at a position close to the tool assembly 001, which is beneficial to the effective transmission of the reciprocating rotation to the tool assembly 001. The surgical tool of this embodiment can, during the operation, inject water into the spiral channel 731 on the outer wall of the spiral water-cooling sleeve 730, enter the water injection pipe 600 through the connection hole 7120 on the front housing 712, and flow out from the end face of the tool head seat 510 through the water injection pipe 600 to achieve flushing, cooling, and temperature reduction of the tool assembly 001.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention rather than 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 spirit 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 drive structure for a surgical tool, characterized in that: Used to connect with the tool assembly and drive the tool assembly to reciprocate, the reciprocating drive structure includes: An eccentric rocker, fixedly connected to the tool assembly and driving the tool assembly to reciprocate, the eccentric rocker comprising a first connecting rod and a first eccentric rod that are fixedly connected, the first connecting rod and the first eccentric rod being eccentrically arranged; An eccentric shaft is transmission-connected to the driving motor, the eccentric shaft comprises a second connecting rod and a second eccentric rod which are fixedly connected, the second connecting rod is eccentrically arranged with the second eccentric rod, and the second connecting rod is transmission-connected to the rotating shaft of the driving motor; The reciprocating conversion connecting rod, the eccentric rocker and the eccentric shaft are both installed on the reciprocating conversion connecting rod, and the first connecting rod and the second connecting rod are respectively located on the opposite sides of the reciprocating conversion connecting rod. The unidirectional rotation of the eccentric shaft drives the reciprocating conversion connecting rod to rotate and drive the eccentric rocker to reciprocate.

2. The reciprocating drive structure for a surgical tool according to claim 1, characterized in that: The second connecting rod is connected with a transmission shaft, and the transmission shaft is transmission-connected to a shaft of a driving motor.

3. The reciprocating drive structure for a surgical tool according to claim 1, characterized in that: The reciprocating drive structure also includes a cutter head seat, the first connecting rod is inserted into the cutter head seat, and can reciprocate in the cutter head seat to keep the axis unchanged, and the first eccentric rod is located on the outside of the cutter head seat.

4. The reciprocating drive structure for a surgical tool according to claim 3, characterized in that: A first supporting tube is sleeved on one end of the first connecting rod close to the tool assembly, and one end of the first supporting tube is inserted into the tool head seat.

5. The reciprocating drive structure for a surgical tool according to claim 1, characterized in that: A bearing seat is arranged on the outer side of the eccentric shaft, a first bearing is installed on the second connecting rod, and the first bearing is installed in the bearing seat.

6. A surgical knife, characterized in that: It comprises a reciprocating drive structure and a tool assembly as described in any one of claims 1 to 5.

7. The surgical knife according to claim 6, characterized in that: The surgical tool also includes a water injection pipe, which is inserted into the tool head seat, and the water outlet end of the water injection pipe is located on the end surface of the tool head seat facing the tool assembly.

8. The surgical knife according to claim 7, characterized in that: The surgical tool also includes an adapter sleeve assembly, a second support tube and a spiral water cooling jacket, one end of the second support tube is connected to the tool head seat, and the other end is connected to the adapter sleeve assembly, the spiral water cooling jacket is located in the adapter sleeve assembly, and a spiral channel is provided on the outer wall of the spiral water cooling jacket, the spiral channel is connected to a water injection pipe, and the water injection pipe is passed through the second support tube.

9. The surgical knife according to claim 8, characterized in that: The adapter sleeve assembly includes an adapter tube and an outer shell, the outer shell is installed on the adapter tube, the spiral water cooling jacket is located in the outer shell, the spiral channel on the outer wall of the spiral water cooling jacket and the inner wall of the outer shell constitute a partial water injection channel, and the transmission shaft is passed through the adapter tube.

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