An eccentric speed-increasing tool

Abstract

This utility model relates to the field of medical devices and discloses an eccentric speed-increasing blade, including a base, a support housing, a blade head, and a transmission mechanism. The support housing is mounted on the base and has a suction channel inside. The blade head is rotatably mounted on the end of the support housing away from the base. The transmission mechanism includes a transmission shaft and a drive shaft. The transmission shaft is rotatably mounted inside the support housing, with one end connected to the blade head and the other end fitted with a first gear. The drive shaft is rotatably mounted inside the base and has a second gear mounted on one end. The second gear meshes with the first gear, and the number of teeth on the second gear is greater than the number of teeth on the first gear. This utility model, through its rational structural design, can increase the rotation speed of the blade head, thereby improving surgical efficiency and reducing surgical risks.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an eccentric speed-increasing tool. Background Technology

[0002] In clinical surgery, medical staff often rely on various specialized surgical instruments to ensure the smooth progress of the procedure. For example, planing tools are used for cutting soft tissues, while grinding tools are used for grinding bone tissue. These special instruments are generally equipped with negative pressure suction functions, which can promptly remove waste fluids and tissue debris generated during surgery, providing an important guarantee for the orderly conduct of the operation.

[0003] For example, application number 202310395927.9 discloses a medical soft tissue planing tool assembly, including a planing tool assembly, a reducer assembly, a housing, a suction device, and an interface portion. This type of tool facilitates the grinding of patient tissue during clinical surgery and can use negative pressure suction to remove waste fluids and tissues generated during the procedure. However, the blade rotation speed of this type of tool is relatively slow, resulting in lower surgical efficiency and increased surgical risks. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide an eccentric speed-increasing blade to solve the problem, as pointed out in the background art, that the blade head rotation speed of the prior art is relatively slow, resulting in low surgical efficiency.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] An eccentric speed-increasing tool, comprising:

[0007] Base;

[0008] A support housing is mounted on the base and has a suction channel inside.

[0009] A cutting head, the cutting head being rotatably mounted at one end of the support housing away from the base; and

[0010] The transmission mechanism includes a transmission shaft and a drive shaft. The transmission shaft is rotatably mounted in the support housing. One end of the transmission shaft is connected to the cutter head, and the other end is equipped with a first gear. The drive shaft is rotatably mounted in the base, and one end is equipped with a second gear. The second gear meshes with the first gear, and the number of teeth of the second gear is greater than the number of teeth of the first gear.

[0011] In one possible implementation, the transmission mechanism further includes an input shaft, one end of which extends into the base and is detachably coaxially connected to the drive shaft, and the other end is provided with a connection end for connecting to an external drive source.

[0012] In one possible implementation, the input shaft has a coupling hole at one end away from the connecting end for the drive shaft to be inserted, and a through hole communicating with the coupling hole is provided on the side wall of the input shaft; one end of the drive shaft has a connecting hole, and a pin is inserted into the connecting hole; when the drive shaft is inserted into the coupling hole, the pin can be inserted into both the connecting hole and the through hole at the same time.

[0013] In one possible implementation, when the drive shaft is inserted into the coupling hole, the input shaft can move axially relative to the drive shaft; the through hole is designed as an oblong hole structure extending axially along the input shaft, and the pin can move within the through hole; a spring is sleeved on the drive shaft, one end of the spring abutting against the base and the other end abutting against the input shaft.

[0014] In one possible implementation, a retaining sleeve is installed inside the base, the retaining sleeve being fitted over the outside of the input shaft to cover the through hole.

[0015] In one possible implementation, the support housing includes a first eccentric support, a second eccentric support, an outer tube, and an inner tube; the first eccentric support and the second eccentric support are respectively installed at both ends of the outer tube; the inner tube passes through the outer tube, and both ends of the inner tube are respectively connected to the first eccentric support and the second eccentric support.

[0016] In one possible implementation, the suction channel is disposed between the inner tube and the outer tube, the first eccentric support has a suction inlet communicating with the suction channel, and the second eccentric support has a suction outlet communicating with the suction channel.

[0017] In one possible implementation, the inner tube is placed eccentrically relative to the outer tube.

[0018] In one possible implementation, at least a portion of the drive shaft is disposed inside the inner tube, and a plastic tube is sleeved between the inner tube and the drive shaft.

[0019] In one possible implementation, at least a portion of the blade head is disposed inside the inner tube, and a connecting tube is sleeved between the inner tube and the blade head.

[0020] The beneficial effects of this utility model are:

[0021] 1. This application separates the suction channel from the drive shaft, so that the rotation speed of the drive shaft does not affect the function of the suction channel. In addition, with the first gear, second gear and other speed-increasing structures, the rotation speed of the blade head is increased, thereby improving surgical efficiency and reducing surgical risks.

[0022] 2. This application increases the maximum width of the suction channel's cross-sectional area by placing the inner tube eccentrically relative to the outer tube, thereby ensuring the smooth passage of large-diameter impurities and reducing the risk of large-diameter impurities clogging the suction channel.

[0023] 3. By designing the input shaft as a flexible and dynamic structure, this application enables a tighter connection between the motor's mating end and the input shaft's connection end, thereby making the transmission between the motor and the input shaft more stable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of an eccentric speed-increasing tool in an embodiment of this application;

[0026] Figure 2 This is an embodiment of the present application. Figure 1 Enlarged view of point B in the middle;

[0027] Figure 3 This is an embodiment of the present application. Figure 1 Enlarged view of point A in the middle;

[0028] Figure 4 This is an exploded view of the drive shaft, input shaft, and retaining sleeve in this embodiment of the application to show their interaction.

[0029] Reference numerals: 100, Base; 110, Front housing; 120, Rear housing; 130, Motor interface; 140, Suction tube; 141, Suction connector; 150, Transition channel; 160, Suction rotary valve; 161, Sealing ring; 170, Baffle; 210, Suction channel; 220, First eccentric support; 221, Suction inlet; 230, Second eccentric support; 231, Suction outlet; 2 40. Outer tube; 250. Inner tube; 251. Adapter tube; 252. Plastic tube; 300. Cutter head; 410. Drive shaft; 411. First gear; 412. First bearing; 420. Drive shaft; 421. Second gear; 422. Connecting hole; 423. Pin; 424. Second bearing; 430. Input shaft; 431. Connecting end; 432. Coupling hole; 433. Through hole; 440. Spring. Detailed Implementation

[0030] 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.

[0031] 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 terms can be understood according to the specific circumstances.

[0032] like Figures 1-4 As shown, this application embodiment provides an eccentric speed-increasing cutting tool, including a base 100, a support housing, a cutting head 300, and a transmission mechanism. The base 100 is equipped with a front housing 110, a rear housing 120, and a motor interface 130. The base 100, front housing 110, and rear housing 120 are combined to form a tightly connected structure, serving as the foundation of the entire cutting tool. The motor interface 130 is mainly used to connect an external drive handle motor.

[0033] The support housing is mounted on the base 100 and has a suction channel 210 inside. Specifically, the support housing includes a first eccentric support 220, a second eccentric support 230, an outer tube 240, and an inner tube 250. The first eccentric support 220 and the second eccentric support 230 are respectively fixedly mounted at both ends of the outer tube 240, while the second eccentric support 230 is fixed to the base 100 by insertion. The base 100 has insertion holes for mounting the second eccentric support 230. The inner tube 250 passes through the outer tube 240, and its two ends are connected to the first eccentric support 220 and the second eccentric support 230, respectively. The first eccentric support 220 has a gourd-shaped through hole, which is mainly used for inserting one end of the inner tube 250, allowing the user to install the inner tube 250. The second eccentric support 230 is designed with an eccentric hole, and one end of the outer tube 240 can be inserted into the eccentric hole. The second eccentric support 230 is also provided with an installation hole for inserting the inner tube 250.

[0034] The outer diameter of the inner tube 250 is smaller than the inner diameter of the outer tube 240. The suction channel 210 is located between the inner tube 250 and the outer tube 240. The first eccentric support 220 has a suction inlet 221 that communicates with the suction channel 210. The suction inlet 221 is also part of the gourd-shaped through hole structure, meaning that the gourd-shaped through hole serves the dual functions of installing the inner tube 250 and the suction inlet 221. The second eccentric support 230 has a suction outlet 231 that communicates with the suction channel 210. In addition, a suction tube 140 is connected to the base 100. The base 100 has a transition channel 150 that connects the suction outlet 231 and the suction tube 140. A suction connector 141 is installed at the end of the suction tube 140 away from the base 100. During the operation, an external negative pressure device can be connected through the suction connector 141. Waste generated during the operation can flow out of the patient's body through the suction inlet 221, suction channel 210, suction outlet 231, transition channel 150, suction tube 140 and other structures, which facilitates the normal implementation of the operation.

[0035] To allow larger-diameter impurities to pass through the suction channel 210, the inner tube 250 is eccentrically positioned relative to the outer tube 240. Because the suction channel 210 is located between the inner tube 250 and the outer tube 240, this eccentric positioning of the inner tube 250 relative to the outer tube 240 increases the maximum width of the cross-sectional area of ​​the suction channel 210, thereby ensuring the smooth passage of large-diameter impurities and reducing the risk of large-diameter impurities clogging the suction channel 210.

[0036] To facilitate operation, a rotary suction valve 160 is installed on the base 100 to control the opening and closing of the transition channel 150. Furthermore, a sealing ring 161 is installed on the rotating part of the rotary suction valve 160 to reduce the risk of leakage.

[0037] The blade head 300 is rotatably mounted on the end of the support housing away from the base 100. Specifically, the shaft portion of the blade head 300 is rotatably mounted inside the inner tube 250, and the head of the blade head 300 is located outside the inner tube 250 and the first eccentric support 220. This part mainly contacts the patient's tissue. It should be noted that the head of the blade head 300 can be a grinding head, a planer, or other surgical instrument; this embodiment does not impose a specific limitation.

[0038] To ensure stable rotation of the shaft of the tool head 300, a transition tube 251 is fitted between the shaft of the tool head 300 and the inner tube 250. By setting the transition tube 251, the tool head 300 can be more stable during rotation, thereby further improving the overall stability of the tool.

[0039] The transmission mechanism includes a drive shaft 410, a drive shaft 420, and an input shaft 430. The drive shaft 410 is rotatably mounted within the support housing. Specifically, one end of the drive shaft 410 is rotatably mounted within the second eccentric support 230 via a first bearing 412, and the other end extends into the inner tube 250 and is fixed to the shaft portion of the cutter head 300. To ensure stable rotation of the drive shaft 410, a plastic tube 252 is sleeved between the inner tube 250 and the drive shaft 410. The end of the drive shaft 410 away from the cutter head 300 extends outside the second eccentric support 230 and is fitted with a first gear 411. The drive shaft 420 is rotatably mounted within the motor interface 130 of the base 100 via a second bearing 424; the motor interface 130 is a tubular structure. A second gear 421 is mounted at one end of the drive shaft 420, and the second gear 421 meshes with the first gear 411, with the number of teeth of the second gear 421 being greater than the number of teeth of the first gear 411. One end of the input shaft 430 extends into the motor interface 130 of the base 100 and is detachably coaxially connected to the drive shaft 420, while the other end is provided with a connection end 431 for connecting to an external drive source.

[0040] It should be noted that the external drive source is a drive handle, on which a motor is mounted. A mating end is mounted on the motor's shaft. When the drive handle is mated with the base 100, the motor's mating end mates with the connection end 431 of the input shaft 430, thereby driving the input shaft 430 to rotate. This rotation, in turn, drives the blade head 300 to rotate via the drive shaft 420, the first gear 411, the second gear 421, and the transmission shaft 410. Furthermore, the second gear 421 has more teeth than the first gear 411, increasing the rotational speed of the blade head 300, thus improving surgical efficiency and reducing surgical risks.

[0041] Furthermore, it should be noted that in existing technologies (such as the medical soft tissue planing tool assembly disclosed in application number 202310395927.9), the suction channel 210 is located inside the drive shaft 410, meaning the drive shaft 410 and the suction channel 210 are integrally formed. This structural design directly results in the drive shaft 410 being unable to rotate too quickly. If it rotates too fast, the sealing performance of the pipe connection will be affected. Therefore, this type of tool requires a speed reduction structure. In this embodiment, however, the suction channel 210 and the drive shaft 410 are designed separately, and the rotation speed of the drive shaft 410 does not affect the function of the suction channel 210. Therefore, this embodiment, through a rational structural design and equipped with speed-increasing structures such as the first gear 411 and the second gear 421, achieves a faster rotation speed of the blade head 300°, thereby improving surgical efficiency and reducing surgical risks.

[0042] In this embodiment, the input shaft 430 has a coupling hole 432 at the end away from the connecting end 431 for the drive shaft 420 to be inserted. A through hole 433 communicating with the coupling hole 432 is provided on the side wall of the input shaft 430. One end of the drive shaft 420 has a connecting hole 422, into which a pin 423 is inserted. When the drive shaft 420 is inserted into the coupling hole 432, the pin 423 can simultaneously insert into both the connecting hole 422 and the through hole 433, thereby achieving a coaxial connection between the input shaft 430 and the drive shaft 420. This allows the input shaft 430 to drive the drive shaft 420 to rotate, and also facilitates the replacement of other models of the input shaft 430 to accommodate more different drive handles.

[0043] Furthermore, to ensure a tighter connection between the input shaft 430 and the external drive handle, the input shaft 430 in this embodiment employs a flexible and dynamic design. Specifically, when the drive shaft 420 is inserted into the coupling hole 432, the input shaft 430 can move axially relative to the drive shaft 420. The through hole 433 is designed as an oblong hole structure extending axially along the input shaft 430, allowing the pin 423 to move axially within the through hole 433. A spring 440 is fitted onto the drive shaft 420, with one end of the spring 440 abutting against the base 100 and the other end abutting against the input shaft 430. Under the elastic force of the spring 440, the input shaft 430 tends to move away from the drive shaft 420. Without the external drive handle connected, the pin 423 can abut against the end of the through hole 433 of the waist-shaped structure near the drive shaft 420 under the elastic force of the spring 440. When the external drive handle is connected, the motor docking end on the drive handle can dock with the connection end 431 of the input shaft 430 and push the input shaft 430 to move a distance closer to the drive shaft 420, thereby compressing the spring 440 and increasing the force of the spring 440 on the input shaft 430. Then, under the elastic force of the spring 440, the docking end of the motor and the connection end 431 of the input shaft 430 are more tightly connected, thereby making the transmission between the motor and the input shaft 430 more stable.

[0044] In this embodiment, a retaining sleeve 170 is installed inside the motor interface 130 of the base 100. The retaining sleeve 170 is fitted over the input shaft 430, covering the through hole 433. By designing the retaining sleeve 170, the rotation of the input shaft 430 can be made more stable, and the movement of the pin 423 can be restricted to prevent the pin 423 from dislodging from the through hole 433, so that the connection between the structures is tighter.

[0045] 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 eccentric speed-increasing cutting tool, characterized in that, include: Base (100); A support housing is mounted on the base (100) and has a suction channel (210) inside. A blade head (300), said blade head (300) being rotatably mounted on one end of the support housing away from the base (100); and The transmission mechanism includes a transmission shaft (410) and a drive shaft (420). The transmission shaft (410) is rotatably mounted in the support housing. One end of the transmission shaft (410) is connected to the cutter head (300), and the other end is equipped with a first gear (411). The drive shaft (420) is rotatably mounted in the base (100), and one end is equipped with a second gear (421). The second gear (421) meshes with the first gear (411), and the number of teeth of the second gear (421) is greater than the number of teeth of the first gear (411).

2. The eccentric speed-increasing tool according to claim 1, characterized in that, The transmission mechanism also includes an input shaft (430), one end of which extends into the base (100) and is detachably coaxially connected to the drive shaft (420), and the other end is provided with a connection end (431) for connecting an external drive source.

3. The eccentric speed-increasing tool according to claim 2, characterized in that, The input shaft (430) has a coupling hole (432) at one end away from the connecting end (431) for the drive shaft (420) to be inserted. The side wall of the input shaft (430) has a through hole (433) communicating with the coupling hole (432). One end of the drive shaft (420) has a connecting hole (422), and a pin (423) is inserted into the connecting hole (422). When the drive shaft (420) is inserted into the coupling hole (432), the pin (423) can be inserted into both the connecting hole (422) and the through hole (433) at the same time.

4. The eccentric speed-increasing tool according to claim 3, characterized in that, When the drive shaft (420) is inserted into the coupling hole (432), the input shaft (430) can move axially relative to the drive shaft (420); the through hole (433) is designed as an oblong hole structure extending axially along the input shaft (430), and the pin (423) can move within the through hole (433); a spring (440) is sleeved on the drive shaft (420), one end of the spring (440) abuts against the base (100), and the other end abuts against the input shaft (430).

5. An eccentric speed-increasing tool according to claim 4, characterized in that, A retainer (170) is installed inside the base (100). The retainer (170) is fitted over the outside of the input shaft (430) to cover the through hole (433).

6. An eccentric speed-increasing tool according to any one of claims 1-5, characterized in that, The supporting shell includes a first eccentric support (220), a second eccentric support (230), an outer tube (240), and an inner tube (250); the first eccentric support (220) and the second eccentric support (230) are respectively installed at both ends of the outer tube (240); the inner tube (250) passes through the outer tube (240), and both ends of the inner tube (250) are respectively connected to the first eccentric support (220) and the second eccentric support (230).

7. An eccentric speed-increasing tool according to claim 6, characterized in that, The suction channel (210) is disposed between the inner tube (250) and the outer tube (240). The first eccentric support (220) has a suction inlet (221) communicating with the suction channel (210), and the second eccentric support (230) has a suction outlet (231) communicating with the suction channel (210).

8. An eccentric speed-increasing tool according to claim 7, characterized in that, The inner tube (250) is placed eccentrically relative to the outer tube (240).

9. An eccentric speed-increasing tool according to claim 6, characterized in that, At least a portion of the structure of the drive shaft (410) is disposed inside the inner tube (250), and a plastic tube (252) is sleeved between the inner tube (250) and the drive shaft (410).

10. An eccentric speed-increasing tool according to claim 6, characterized in that, At least a portion of the structure of the blade head (300) is disposed inside the inner tube (250), and a transfer tube (251) is sleeved between the inner tube (250) and the blade head (300).

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