Reciprocating cutting tool

Abstract

The present invention provides a reciprocating cutting tool, comprising a cutting head assembly and a drive assembly. The drive assembly is in transmission connection to the cutting head assembly, and the drive assembly drives the cutting head assembly to perform a reciprocating motion. By means of integrating the cutting head assembly and the drive assembly into one product and driving the product by an external drive component, the overall structure is compact and easy to maintain, and the rotary motion of a unidirectional motor can be converted into reciprocating rotary motion, oscillating motion, or linear reciprocating motion at a working portion of the cutting head assembly. Further, the product can be integrated with a water injection channel to flush and cool the cutting head assembly, thereby improving the service life of the cutting head assembly.

Description

Reciprocating tool Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a reciprocating cutter. Background Art

[0002] Currently, surgical operations usually involve grinding, planing, or drilling patients' soft tissues, bones, etc. with the help of cutting tools.

[0003] The existing Chinese patent application document with publication number CN214017702U discloses a water-cooled reciprocating grinding head for surgery. The grinding head is driven to rotate back and forth by a reciprocating device and cooled by a cooling device, thereby grinding bone tissue. However, the driving structure of this technical solution is complex, and the motor and transmission device are both arranged in the housing, which is inconvenient to maintain.

[0004] The existing Chinese patent application document with publication number CN205913375U discloses a surgical burr, which includes a burr device and a reciprocating device. The reciprocating device drives the burr device to perform reciprocating rotational motion under the drive device. The reciprocating device connected to the grinding handle drives the rotating grinding head to perform reciprocating grinding of bone tissue under various usage conditions. The grinding head cannot be cooled, which is a problem that needs to be improved.

[0005] The existing Chinese patent application document with publication number CN105832378B discloses a bone surgery grinding drill, which includes a grinding head and a grinding handle connected to the grinding head. The grinding head is inserted into a support rod through the grinding handle, and a supporting ring is provided on the support rod. The transmission structure is inconvenient to operate.

[0006] A Chinese patent application with publication number CN208769904U discloses an eccentric reciprocating surgical burr, comprising a burr assembly and a reciprocating mechanism. The burr assembly includes a grinding head and a support rod. The grinding head is inserted into the support rod via a shank. The reciprocating mechanism, connected to the shank, drives the rotating grinding head to reciprocate and grind bone tissue. This reciprocating burr lacks water cooling, resulting in a short service life for the grinding head.

[0007] The existing Chinese patent application document with publication number CN208769903U discloses a surgical burr with a reciprocating drive structure, including a burr device and a reciprocating device. The burr device includes a grinding head and a support rod. The grinding head is inserted into the support rod through a burr handle. The reciprocating device connected to the burr handle drives the rotating grinding head to perform a reciprocating grinding operation on bone tissue. The reciprocating burr does not have a water cooling solution, and the service life of the grinding head is short.

[0008] The existing Chinese patent application document with publication number CN209450602U discloses a burr for transforaminal endoscopic surgery. The position of the operating sleeve is moved to adjust the grinding depth of the grinding head. A reciprocating device connected to the grinding handle drives the rotating grinding head to perform a reciprocating grinding operation on bone tissue. The burr technology solution does not have a water cooling solution, and the service life of the grinding head is short.

[0009] Currently, the market is in urgent need of an integrated product that can stably convert the unidirectional rotation of the motor into the reciprocating motion of the cutter head. Summary of the Invention

[0010] In view of the defects in the prior art, an object of the present invention is to provide a reciprocating tool.

[0011] A reciprocating tool provided according to the present invention includes a cutter head assembly and a drive assembly, wherein the drive assembly is transmission-connected to the cutter head assembly, and the drive assembly drives the cutter head assembly to perform reciprocating motion.

[0012] According to the present invention, a reciprocating tool includes a housing, a cutter head assembly, and a drive assembly. The drive assembly includes an eccentric shaft, an articulated connector, and a transmission rod. The eccentric shaft, articulated connector, transmission rod, and cutter head assembly are all disposed within the housing, and a working end of the cutter head assembly extends out of the housing.

[0013] The articulated connector includes a connecting frame and a swinging lever, the articulated connector is rotatably mounted in the housing, one end of the eccentric shaft extends into the connecting frame and rotatably engages with the connecting frame, the swinging lever is hingedly connected to one end of the transmission rod, and the other end of the transmission rod is transmission-connected to the cutter head assembly;

[0014] The rotation of the eccentric shaft drives the articulated connector to swing back and forth around its articulated axis, and the swing rod on the articulated connector drives the transmission rod to perform reciprocating linear motion along the transmission rod axis.

[0015] Preferably, the cutter head assembly includes a saw blade, a cutter head seat and a connecting rod, one end of the connecting rod is coaxially fixedly connected to the transmission rod, the other end of the connecting rod is coaxially fixedly connected to the cutter head seat, the saw blade is fixedly mounted on the end of the cutter head seat away from the connecting rod, and the saw blade extends out of the housing.

[0016] Preferably, a mounting sleeve is provided at one end of the shell away from the cutter head assembly, the eccentric shaft and the articulated connector are both arranged in the mounting sleeve, a first water injection channel is formed between the mounting sleeve and the shell, a second water injection channel is formed between the connecting rod and the shell, and a third water injection channel is formed between the cutter head seat and the shell, and the first water injection channel, the second water injection channel and the third water injection channel are connected in sequence.

[0017] Preferably, a support sleeve is provided between the housing and the connecting rod, and a sealing sleeve is provided on one end of the support sleeve away from the articulated connector, and the sealing sleeve seals the connection between the support sleeve and the connecting rod.

[0018] Preferably, the saw blade body is of uniform thickness, the cutter head seat is provided with an axial mounting groove, and one end of the saw blade is embedded in the axial mounting groove;

[0019] The outer surface of the cutter head seat is provided with a rectangular section, a connecting sleeve is provided between the cutter head seat and the shell, and a third water injection channel is formed between the rectangular section of the cutter head seat and the connecting sleeve.

[0020] According to the present invention, a reciprocating tool comprises a housing, a cutter head assembly, and a drive assembly. The cutter head assembly comprises an oscillating blade and an oscillating blade seat. The oscillating blade is fixedly connected to the oscillating blade seat. The oscillating blade and / or the oscillating blade seat are hingedly connected to the housing. The end of the oscillating blade away from the oscillating blade seat extends out of the housing.

[0021] The driving assembly includes an eccentric shaft, and a connecting frame is formed at one end of the swinging blade seat away from the swinging blade. The eccentric shaft extends into the connecting frame and rotates with the connecting frame. The rotation of the eccentric shaft drives the end of the swinging blade extending out of the shell to swing back and forth around the hinge shaft.

[0022] Preferably, the driving assembly further comprises a rotating shaft and a transmission shaft, the rotating shaft is coaxially fixedly connected to the transmission shaft, and one end of the transmission shaft away from the rotating shaft is coaxially fixedly connected to one end of the eccentric shaft away from the swinging knife seat.

[0023] Preferably, a mounting sleeve is provided at one end of the housing away from the cutter head assembly, the rotating shaft is provided in the mounting sleeve, a structural support sleeve is provided between the transmission shaft and the housing, and a sealing sleeve is provided between the transmission shaft and the structural support sleeve;

[0024] The end of the structural support sleeve away from the rotating shaft is connected to a connecting sleeve, and the eccentric shaft is rotatably arranged in the connecting sleeve;

[0025] A communicating water injection channel is formed between the mounting sleeve, the structural support sleeve and the connecting sleeve and the shell. The opening of the water injection channel is located at one end of the connecting sleeve close to the cutter head assembly.

[0026] According to the present invention, a reciprocating tool comprises a housing, a cutter head assembly, and a drive assembly, wherein the cutter head assembly comprises a ring saw, the drive assembly comprises an eccentric shaft, a transmission rocker, and a central transmission shaft, the transmission rocker comprising a connecting frame and a transmission rod, the connecting frame being located at one end of the transmission rod axis, the eccentric shaft extending into the connecting frame and rotatably cooperating with the connecting frame, and the transmission rod having an end away from the connecting frame and coaxially fixedly connected to one end of the central transmission shaft;

[0027] The other end of the central transmission shaft is fixedly connected to the ring saw, and the working part of the ring saw extends out of the housing;

[0028] The rotation of the eccentric shaft drives the transmission rocker to swing back and forth, and the transmission rocker drives the ring saw to rotate back and forth through the central transmission shaft.

[0029] Preferably, a mounting sleeve is provided at one end of the housing away from the cutter head assembly, the eccentric shaft is arranged in the mounting sleeve, a structural support sleeve is provided between the central transmission shaft and the housing, and a sealing sleeve is provided between the central transmission shaft and the structural support sleeve;

[0030] A failure protection sleeve is provided between the central transmission shaft and the housing;

[0031] A water injection channel is formed between the mounting sleeve and the shell, a through hole is provided on the central transmission shaft to connect the inner cavity of the central transmission shaft with the water injection channel, and a water injection hole is provided inside the ring saw, and the water injection hole is connected to the inner cavity of the central transmission shaft.

[0032] Preferably, the cutter head of the ring saw is a hollow ring, and the main body of the ring saw is provided with a weight-reducing window.

[0033] According to the present invention, a reciprocating tool includes a housing, a cutter head assembly, and a drive assembly, wherein the drive assembly includes an eccentric shaft, a transmission collar, an eccentric transmission shaft, and a connecting shaft, the cutter head assembly includes a milling cutter head, the transmission collar includes a first ring portion and a second ring portion, the first ring portion is sleeved on the eccentric shaft and rotatably engaged with the eccentric shaft, the eccentric transmission shaft extends into the second ring portion and rotatably engaged with the second ring portion, and the end of the eccentric transmission shaft away from the transmission collar is transmission-connected to the connecting shaft;

[0034] One end of the connecting shaft away from the transmission shaft is transmission-connected to the milling cutter head;

[0035] The rotation of the eccentric shaft drives the eccentric transmission shaft to rotate through the transmission collar, and then drives the milling cutter head to rotate back and forth through the connecting shaft.

[0036] Preferably, the end face and side face of the milling cutter head are provided with grinding teeth, and a connecting arc surface is provided between the grinding teeth on the end face of the milling cutter head and the grinding teeth on the side face of the milling cutter head;

[0037] The middle portion of the end surface of the milling cutter head is concave.

[0038] Preferably, a mounting sleeve is provided at one end of the housing away from the cutter head assembly, the eccentric shaft and the transmission collar are both provided in the mounting sleeve, the eccentric transmission shaft is transmission-connected to the connecting shaft via a structural tube, a structural support sleeve is provided between the structural tube and the housing, and a sealing sleeve is provided between the central transmission shaft and the structural support sleeve;

[0039] A first water injection channel is formed between the mounting sleeve and the shell, a second water injection channel is formed between the structural support sleeve and the shell, and a third water injection channel is arranged between the structural pipe and the shell. The first water injection channel, the second water injection channel and the third water injection channel are connected in sequence, and the water outlet of the third water injection channel is located at one end of the structural pipe close to the milling cutter head.

[0040] According to the present invention, a surgical reciprocating sharpener is provided, comprising a cutter head and a drive conversion assembly for driving the cutter 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 cutter head, and a first eccentric column is fixed to 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 to 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.

[0041] Preferably, the reciprocating knife sharpener further comprises a housing, the transmission shaft is passed through the housing, a pin is plugged into the housing, and the shift fork is rotatably mounted on the pin;

[0042] The conversion link has plug holes at opposite ends, a connecting column is fixed on one fork tip of the shift fork, the connecting column is plugged into one plug hole, and the first eccentric column is plugged into the other plug hole;

[0043] The transmission shaft and the input shaft are coaxially arranged;

[0044] The reciprocating knife sharpener further comprises an interface housing and a housing sleeve, wherein the input shaft is inserted into the interface housing, one end of the housing sleeve is sleeved on the outer shell, and the other end is sleeved on the interface housing;

[0045] 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;

[0046] 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.

[0047] According to the present invention, a reciprocating drive structure for a surgical tool is provided, which is used to connect to a tool assembly and drive the tool assembly to rotate reciprocally. The reciprocating drive structure includes:

[0048] an eccentric rocker fixedly connected to the tool assembly and driving the tool assembly to rotate back and forth, the eccentric rocker comprising a first connecting rod and a first eccentric rod fixedly connected, the first connecting rod and the first eccentric rod being eccentrically arranged;

[0049] an eccentric shaft, drivingly connected to the drive motor, the eccentric shaft comprising a second connecting rod and a second eccentric rod fixedly connected, the second connecting rod being eccentrically arranged to the second eccentric rod, and the second connecting rod being drivingly connected to the rotating shaft of the drive motor;

[0050] 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 rotate reciprocatingly.

[0051] Preferably, the second connecting rod is connected to a transmission shaft, and the transmission shaft is in transmission connection with a shaft of a driving motor;

[0052] The reciprocating drive structure further includes a cutter head seat, wherein the first connecting rod is provided in the cutter head seat and can reciprocate in the cutter head seat while keeping the axis unchanged, and the first eccentric rod is located outside the cutter head seat;

[0053] 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;

[0054] A bearing seat is provided 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.

[0055] According to a surgical tool provided by the present invention, the surgical tool further comprises a water injection pipe, the water injection pipe is provided in the cutter head seat, and the water outlet end of the water injection pipe is located on the end surface of the cutter head seat facing the cutter assembly;

[0056] The surgical tool further includes an adapter sleeve assembly, a second support tube and a spiral water cooling jacket, wherein one end of the second support tube is connected to the cutter head seat and the other end is connected to the adapter sleeve assembly, the spiral water cooling jacket is located within the adapter sleeve assembly, and the outer wall of the spiral water cooling jacket has a spiral channel, the spiral channel is connected to a water injection pipe, and the water injection pipe is disposed within the second support tube;

[0057] 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 inside 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. The transmission shaft is passed through the adapter tube.

[0058] According to the present invention, a medical reciprocating drill bit for orthopedic drilling is provided, comprising:

[0059] A drill assembly, used for performing reciprocating rotational motion to drill holes in bone tissue;

[0060] A drive assembly is used to drive the drill assembly to perform reciprocating rotational motion. The drive assembly includes a reciprocating conversion rod, a connecting sleeve, and an input rod. The reciprocating conversion rod is connected to the drill assembly. One end of the connecting sleeve is sleeved on the reciprocating conversion rod, and the other end is sleeved on the input rod. The input rod and the reciprocating conversion rod are eccentrically arranged. The rotation of the input rod drives the reciprocating conversion rod to perform reciprocating rotational motion.

[0061] The water injection channel is used to spray water onto the punching position on the bone tissue. An outer tube is sleeved on the reciprocating conversion rod, and the gap between the outer tube and the reciprocating conversion rod constitutes the water injection channel.

[0062] Preferably, the drill bit assembly comprises a connecting rod and a drill body fixedly connected to the connecting rod, and the drill body comprises a cone and a cylinder fixedly connected;

[0063] The side walls of the cone and the cylinder are both provided with drill teeth; the end of the connecting rod close to the drill body is connected to the cylinder, and the end of the connecting rod away from the drill body is inserted into the reciprocating conversion rod;

[0064] The reciprocating conversion rod includes a transmission rod and an eccentric column, the eccentric column is eccentrically arranged with the transmission rod, an eccentric shaft is fixed to one end of the input rod close to the reciprocating conversion rod, the eccentric shaft is eccentrically arranged with the input rod, one end of the connecting sleeve has a connecting hole, and the other end has a mounting hole, the eccentric column is passed through the connecting hole, the eccentric shaft is mounted in the mounting hole, a bearing is installed in the mounting hole, and the bearing sleeve is mounted on the eccentric shaft;

[0065] The reciprocating drill bit further includes a front housing, a spiral water-cooling jacket, and a rear housing. The outer tube and the reciprocating conversion rod are both disposed within the front housing. The outer wall of the spiral water-cooling jacket has a spiral channel. The front housing has a water inlet connected to the interior. The water outlet end of the spiral channel is connected to the water inlet. The water inlet is connected to the gap between the outer tube and the reciprocating conversion rod. The rear housing is sleeved on the spiral water-cooling jacket and connected to the front housing.

[0066] The outer tube has a water groove at one end away from the drill bit assembly, the water groove is communicated with the interior of the outer tube, and the water inlet hole is communicated with the water groove;

[0067] A sealing sleeve is sleeved on one end of the transmission rod away from the drill bit assembly, and a retaining sleeve is sleeved between the sealing sleeve and the transmission rod;

[0068] A water pipe is sleeved on one end of the transmission rod close to the drill bit assembly, wherein the outer wall of one side of the water pipe contacts the inner wall of the outer tube, and the outer wall of the other side forms a channel communicating with the outside with the inner wall of the outer tube;

[0069] A clamping groove is provided on the circumferential outer wall of the front shell, and a clamping ring is provided on the rear shell. The clamping ring is embedded in the clamping groove to form a seal.

[0070] Compared with the prior art, the present invention has the following beneficial effects:

[0071] 1. The present invention integrates the cutter head assembly and the drive assembly into one product and drives it through an external drive member. The overall structure is compact and maintenance is convenient. It can also convert the rotation of the unidirectional motor into reciprocating rotation, reciprocating swing or linear reciprocating motion of the working part of the cutter head assembly.

[0072] 2. The present invention is made into a product by a saw blade and a drive assembly. The drive assembly can convert the unidirectional rotation of the external input into the linear reciprocating motion of the saw blade with the help of the cooperation of the eccentric shaft, the articulated connector and the transmission rod. The structure is compact and a water cooling channel is integrated in the product. The water cooling channel can be connected to an external water source to flush and cool the saw blade, thereby increasing the service life of the saw blade.

[0073] 3. The present invention uses an eccentric shaft and a connecting frame on the swinging blade seat to convert the swinging blade into a reciprocating swing around the hinge axis, thus achieving the reciprocating cutting operation of the swinging blade. In addition, the eccentric shaft is positioned close to the swinging blade, which can improve the stability of the swinging blade's reciprocating motion.

[0074] 4. The present invention converts the reciprocating rotation of the central transmission shaft into reciprocating rotation through the eccentric shaft and the transmission rocker, thereby realizing the reciprocating rotation of the ring saw, and the ring saw can be cooled by injecting external cooling water.

[0075] 5. The present invention converts the reciprocating rotation of the connecting shaft into a reciprocating rotation through the cooperation of the eccentric shaft, the transmission sleeve and the eccentric transmission shaft, thereby driving the reciprocating rotation of the milling cutter head; a water injection channel is also provided to flush and cool the milling cutter head, thereby increasing the service life of the milling cutter head; and the milling cutter head structure design with the middle part of the end face being concave improves the cutting effect.

[0076] 6. The present invention drives the input shaft to rotate unidirectionally under the drive of an external motor, so that the second eccentric column rotates eccentrically. With the cooperation of the first bearing, the shift fork swings back and forth in the circumferential direction, driving the conversion connecting rod to swing back and forth, and then driving the transmission shaft to make reciprocating rotation motion under the action of the first eccentric column, and then driving the cutter head to make reciprocating rotation motion to grind bone tissue. The reciprocating rotation motion of the cutter head is conducive to uniform force when grinding bone tissue, and the grinding wound surface is neat and stable, which makes it smoother when processing bone tissue, effectively improves the grinding effect, and is beneficial to wound recovery.

[0077] 7. The present invention injects water into the spiral channel on the outer wall of the spiral water-cooling jacket, enters the water injection pipe through the connecting hole on the front shell, and flows out from the end face of the cutter head seat through the water injection pipe to achieve flushing, cooling and lowering of the temperature of the tool assembly.

[0078] 8. The present invention uses an external water injection mechanism to inject water into the reciprocating drill bit, and then flows out through the outer tube. Specifically, the injected water enters the water inlet through the spiral channel, flows into the gap between the outer tube and the transmission rod through the water inlet and the water trough, and finally flows out from the end of the outer tube close to the drill body, flushing and cooling the drilling position, thereby improving the drilling efficiency.

[0079] 9. The present invention uses a water injection channel integrated on the product. When the coolant passes through the position of the reciprocating conversion mechanism, it can absorb the heat generated by the reciprocating conversion mechanism, cool the reciprocating conversion mechanism, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0081] FIG1 is a schematic cross-sectional view of the overall structure of a reciprocating tool in a first embodiment of the present invention;

[0082] FIG2 is a schematic diagram of the overall structure of a reciprocating tool in the first embodiment of the present invention;

[0083] FIG3 is a diagram showing the parts of the reciprocating tool in the first embodiment of the present invention;

[0084] FIG4 is a cross-sectional view of the overall structure of a short-handled swinging knife in a second embodiment of the present invention;

[0085] FIG5 is a cross-sectional view of the overall structure of the long-handled swinging knife in the second embodiment of the present invention;

[0086] FIG6 is a schematic diagram of the structure of a swinging knife tool in the second embodiment of the present invention;

[0087] FIG7 is a schematic diagram of the structure of the short-handled swing knife housing in the second embodiment of the present invention;

[0088] FIG8 is a cross-sectional view of the overall structure of the reciprocating tool in the third embodiment of the present invention;

[0089] FIG9 is a schematic diagram of the overall structure of the ring saw in the third embodiment of the present invention;

[0090] 10 is a diagram showing the parts of the ring saw according to the third embodiment of the present invention;

[0091] FIG11 is a cross-sectional view of the overall structure of the reciprocating tool in the fourth embodiment of the present invention;

[0092] FIG12 is a schematic diagram of the overall structure of the milling tool in the fourth embodiment of the present invention;

[0093] FIG13 is a diagram showing the parts of the milling tool in the fourth embodiment of the present invention;

[0094] FIG14 is a schematic diagram of the eccentric shaft structure in the fourth embodiment of the present invention;

[0095] FIG15 is a cross-sectional view of a surgical reciprocating sharpener according to a fifth embodiment of the present invention;

[0096] FIG16 is an enlarged structural diagram of point A in FIG15 in the fifth embodiment of the present invention;

[0097] FIG17 is a schematic diagram of the structure of a reciprocating surgical sharpener according to a fifth embodiment of the present invention;

[0098] FIG18 is an enlarged structural diagram of the adapter, the transmission shaft, and the input shaft in the fifth embodiment of the present invention;

[0099] FIG19 is a schematic diagram of the assembly structure of the adapter and the transmission shaft in the fifth embodiment of the present invention;

[0100] FIG20 is a cross-sectional view of a reciprocating drive structure for a surgical tool according to a sixth embodiment of the present invention;

[0101] FIG21 is a schematic structural diagram of an eccentric rocker arm, a reciprocating connecting rod, and an eccentric shaft in a sixth embodiment of the present invention;

[0102] FIG22 is a cross-sectional view of the surgical tool in the sixth embodiment of the present invention;

[0103] FIG23 is an enlarged view of point A in FIG22 in Embodiment 6 of the present invention;

[0104] FIG24 is a schematic structural diagram of a surgical tool according to a sixth embodiment of the present invention;

[0105] FIG25 is a second cross-sectional view of the surgical tool in the sixth embodiment of the present invention;

[0106] FIG26 is a schematic diagram of the exploded structure of the orthopedic medical reciprocating drill bit according to the seventh embodiment of the present invention;

[0107] FIG27 is a schematic structural diagram of a medical reciprocating drill bit for orthopedic drilling in accordance with a seventh embodiment of the present invention;

[0108] FIG28 is a cross-sectional view of a medical reciprocating drill bit for orthopedic drilling according to a seventh embodiment of the present invention;

[0109] FIG29 is an enlarged structural diagram of point A in FIG28 in Embodiment 7 of the present invention;

[0110] FIG30 is an enlarged structural diagram of the drill bit assembly in the seventh embodiment of the present invention.

[0111] As shown in the figure: housing 1001, eccentric shaft 1002, hinged connector 1003, transmission rod 1004, connecting frame 1005, swing rod 1006, saw blade 1007, cutter head seat 1008, connecting rod 1009, mounting sleeve 1010, support sleeve 1011, sealing sleeve 1012, connecting sleeve 1013, mounting cylinder 1014, sealing ring 1015, housing 2001, swing blade 2002, swing blade seat 2003, eccentric shaft 2004, connecting frame 2005, rotating shaft 2006, transmission shaft 2007, mounting sleeve 2008, structural support sleeve 2009, sealing sleeve 2010, connecting sleeve 2011, mounting cylinder 2012, sealing ring 2013, housing 3001, ring saw 3002, eccentric shaft 300 3. Transmission rocker 3004, central transmission shaft 3005, mounting sleeve 3006, mounting cylinder 3007, sealing ring 3008, structural support sleeve 3009, sealing sleeve 3010, failure protection sleeve 3011, weight reduction window 3012, housing 4001, eccentric shaft 4002, transmission collar 4003, eccentric transmission shaft 4004, connecting shaft 4005, milling cutter head 4006, mounting sleeve 4007, mounting cylinder 4008, sealing ring 4009, structural tube 4010, structural support sleeve 4011, sealing sleeve 4012, connecting arc surface 4013, cutter head 5100, cutter handle 5110, transmission shaft 5210, first eccentric column 5211, connecting hole 5212, input shaft 5220, second eccentric column 5221, Shift fork 5230, mounting hole 5231, connecting column 5232, conversion connecting rod 5240, plug hole 5241, first bearing 5250, pin 5260, second bearing 5270, housing 5310, interface housing 5320, housing sleeve 5330, outer blade tube 5410, support tube 5420, eccentric rocker 6100, first connecting rod 6110, first eccentric rod 6120, eccentric shaft 6200, second connecting rod 6210, second eccentric rod 6220, transmission shaft 6230, reciprocating conversion connecting rod 6300, plug hole 6310, input shaft 6400, cutter head seat 6510, first support tube 6520, bearing seat 6530, first bearing 6540, water injection pipe 6600, adapter sleeve assembly 671 0, transfer tube 6711, front housing 6712, connecting hole 67120, rear housing 6713, second support tube 6720, spiral water cooling jacket 6730, spiral channel 6731, second bearing 6800, tool assembly 6001, connecting rod 7110, drill body 7120, cone 7121, drill tooth 7130, reciprocating conversion rod 7210, transmission rod 7211, eccentric column 7212, connecting sleeve 7220, connecting hole 7221, mounting hole 7222, input rod 7230, eccentric shaft 7231, water injection channel 7300, outer tube 7400, water trough 7410, water pipe 7420, bearing 7500, front housing 7610, water inlet hole 7611, slot 7612, spiral water cooling jacket 7620,Spiral channel 7622, ​​water injection groove 7621, rear housing 7630, snap ring 7631, sealing sleeve 7710, stopper sleeve 7720, bushing 7730, interface housing 7800, bearing spacer 7810. DETAILED DESCRIPTION

[0112] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0113] Example 1

[0114] As shown in Figures 1 to 3, a reciprocating tool provided according to the present invention includes a cutter head assembly and a drive assembly, which is connected to the cutter head assembly in a transmission manner, and the drive assembly drives the cutter head assembly to perform reciprocating motion. It should be noted that the cutter head assembly and the drive assembly of the technical solution of the present application are integrated into one product and driven by an external drive member. The overall structure is compact and easy to maintain. In addition, the technical solution of the present application can convert the rotation of the unidirectional motor into reciprocating rotation, reciprocating swing or linear reciprocating motion of the working part of the cutter head assembly.

[0115] In one feasible embodiment: a reciprocating tool comprises a housing 1001, a cutter head assembly, and a drive assembly, wherein the drive assembly comprises an eccentric shaft 1002, an articulated connector 1003, and a transmission rod 1004. The eccentric shaft 1002, the articulated connector 1003, the transmission rod 1004, and the cutter head assembly are all disposed within the housing 1001, and the working end of the cutter head assembly extends out of the housing 1001. The articulated connector 1003 comprises a connecting frame 1005 and a swinging rod 1006. The articulated connector 1003 is rotatably mounted within the housing 1001. One end of the eccentric shaft 1002 extends into the connecting frame 1005 and rotatably engages with the connecting frame 1005. The swinging rod 1006 is hingedly connected to one end of the transmission rod 1004, and the other end of the transmission rod 1004 is in transmission connection with the cutter head assembly. The rotation of the eccentric shaft 1002 drives the articulated connector 1003 to swing back and forth around its articulated axis, and the swing rod 1006 on the articulated connector 1003 drives the transmission rod 1004 to perform reciprocating linear motion along the axis of the transmission rod 1004.

[0116] Specifically, the housing 1001 is composed of an outer shell and an outer tube. One end of the outer tube extends into the outer shell and is securely connected to the outer shell. The working end of the cutter head assembly extends from the end of the outer tube away from the outer shell. A mounting sleeve 1010 is provided at the end of the housing 1001 away from the cutter head assembly. The eccentric shaft 1002 and the articulated connector 1003 are both disposed within the mounting sleeve 1010. A mounting barrel 1014 is fixedly disposed within the mounting sleeve 1010 on the side away from the cutter head assembly. The eccentric shaft 1002 is rotatably mounted within the mounting barrel 1014 via a bearing, with the eccentric end of the eccentric shaft 1002 extending out of the mounting barrel 1014. The other end of the eccentric shaft 1002 is provided with a connector capable of being connected to an external motor. A first water injection channel is formed between the mounting sleeve 1010 and the housing 1001. The water inlet of the first water injection channel is located at the end of the mounting sleeve 1010 away from the cutter head assembly. A sealing ring 1015 is embedded on the inner wall of the mounting sleeve 1010 at the water inlet, and a sealing ring 1015 is also provided on the outer wall of the mounting cylinder 1014. It should be noted that the technical solution of the present application does not limit the shape of the first water injection channel formed between the mounting sleeve 1010 and the housing 1001. The first water injection channel can be linear or spiral, preferably spiral. In actual use, the housing 1001 of the external drive device can be extended between the mounting sleeve 1010 and the mounting cylinder 1014 for connection, and an external water source can enter the interior of the first water injection channel through the water inlet of the first water injection channel. The two sealing rings 1015 can prevent the water source from entering the interior of the drive assembly, thereby protecting the drive assembly.

[0117] More specifically, the articulated connector 1003 includes a connecting frame 1005 and a swinging rod 1006. An angle is formed between the connecting frame 1005 and the swinging rod 1006, preferably 90 degrees. The axis of the transmission rod 1004 is parallel to the axis of the eccentric shaft 1002. The articulated connector 1003 is hingedly connected to the mounting sleeve 1010 via a connecting shaft. The connecting frame 1005 and the eccentric shaft 1002 are rotatably engaged. When the eccentric shaft 1002 rotates under the action of an external drive, the connecting frame 1005 swings a certain angle around the axis of the connecting shaft between the articulated connector 1003 and the mounting sleeve 1010, thereby driving the transmission rod 1004 to reciprocate along its axial direction for a certain length via the swinging rod 1006.

[0118] The cutter head assembly includes a saw blade 1007, a cutter head seat 1008, and a connecting rod 1009. One end of the connecting rod 1009 is coaxially fixedly connected to the transmission rod 1004, and the other end of the connecting rod 1009 is coaxially fixedly connected to the cutter head seat 1008. The saw blade 1007 is fixedly mounted on the end of the cutter head seat 1008 away from the connecting rod 1009, and the saw blade 1007 extends out of the housing 1001. It should be emphasized that the saw blade 1007 of the technical solution of the present application has a uniform thickness structure. The uniform thickness structure can be achieved by making the saw blade 1007 from a monolithic plate. An axial mounting groove is provided on the cutter head seat 1008, and one end of the saw blade 1007 is embedded and mounted in the axial mounting groove. The monolithic saw blade 1007 has a high structural strength.

[0119] More specifically, a second water injection channel is formed between the connecting rod 1009 and the housing 1001, and a third water injection channel is formed between the cutter head seat 1008 and the housing 1001. The first water injection channel, the second water injection channel, and the third water injection channel are connected in sequence, enabling water to be injected from the outside into the working area through the cutter, thereby flushing and cooling the cutter head. Furthermore, preferably, a support sleeve 1011 is provided between the housing 1001 and the connecting rod 1009, and a sealing sleeve 1012 is provided on the end of the support sleeve 1011 away from the articulated connector 1003. The sealing sleeve 1012 seals the connection between the support sleeve 1011 and the connecting rod 1009. The sealing sleeve 1012 seals the connection between the support sleeve 1011 and the connecting rod 1009, thereby preventing cooling water from entering the drive assembly and providing waterproof protection for the drive assembly.

[0120] In a feasible embodiment, regarding the third water injection channel, the outer surface of the cutter head seat 1008 is provided with a rectangular cross-section, and a connecting sleeve 1013 is provided between the cutter head seat 1008 and the outer shell. The third water injection channel is formed between the rectangular cross-section of the cutter head seat 1008 and the connecting sleeve 1013, and the water outlet of the third water injection channel is located at one end of the connecting sleeve 1013 close to the working part of the saw blade 1007.

[0121] In a feasible embodiment, the connection method between the cutter head seat 1008 and the connecting rod 1009 is: the connecting rod 1009 is a hollow rod, the end of the cutter head seat 1008 away from the saw blade is a round rod, and the end of the cutter head seat 1008 away from the saw blade extends into the interior of the connecting rod 1009 and is coaxially fixed by glue or welding.

[0122] This embodiment integrates the saw blade and the drive assembly into a single product. The drive assembly, through the cooperation of the eccentric shaft 1002, the articulated connector 1003, and the transmission rod 1004, can convert the unidirectional rotation input from the external input into the linear reciprocating motion of the saw blade. The structure is compact, and a water cooling channel is also integrated into the product. The water cooling channel can be connected to an external water source to rinse and cool the saw blade, thereby increasing the service life of the saw blade. It should be noted that the reciprocating conversion mechanism formed by the cooperation of the eccentric shaft 1002, the articulated connector 1003, and the transmission rod 1004 in this embodiment will generate high temperatures when operated for a long time. The coolant in the water cooling channel can absorb the heat generated by the reciprocating conversion mechanism when passing through the position of the reciprocating conversion mechanism, thereby improving the user experience.

[0123] Example 2

[0124] As shown in Figures 4 to 7, the reciprocating tool includes a housing 2001, a cutter head assembly, and a drive assembly. The cutter head assembly includes an oscillating blade 2002 and an oscillating blade seat 2003. The oscillating blade 2002 is fixedly connected to the oscillating blade seat 2003. The oscillating blade 2002 and / or the oscillating blade seat 2003 are hingedly connected to the housing 2001. The end of the oscillating blade 2002 away from the oscillating blade seat 2003 extends out of the housing 2001. The drive assembly includes an eccentric shaft 2004. A connecting frame 2005 is formed at the end of the oscillating blade seat 2003 away from the oscillating blade 2002. The eccentric shaft 2004 extends into the connecting frame 2005 and rotates in conjunction with the connecting frame 2005. The rotation of the eccentric shaft 2004 drives the end of the oscillating blade 2002 extending out of the housing 2001 to reciprocate about the hinge axis.

[0125] Different from the technical solution of embodiment 1, in this embodiment, the unidirectional rotation of the external input is converted into the swinging blade 2002 within a certain angular range around the hinge axis between it and the shell 2001 through the driving component, and the swinging angle can be designed according to actual conditions.

[0126] Specifically, one end of the oscillating blade 2002 extends into the connecting groove of the oscillating blade seat 2003 and is fixedly connected via a fixed connection method such as hinged connection, welding, or fasteners. The housing 2001 includes an outer shell and an outer tube. One end of the outer tube extends into the outer shell and is fixedly connected to the outer shell. The oscillating blade 2002 and / or the oscillating blade seat 2003 are hingedly connected to the outer tube via a rotating shaft 2006. A mounting sleeve 2008 is provided at the end of the housing 2001 away from the oscillating blade 2002. A mounting barrel 2012 is fixedly provided within the mounting sleeve 2008 on a side away from the cutter head assembly. An eccentric shaft 2004 is rotatably mounted within the mounting barrel 2012 via a bearing, with the eccentric end of the eccentric shaft 2004 extending out of the mounting barrel 2012. The other end of the eccentric shaft 2004 is provided with a connector capable of being connected to an external motor by transmission. The working portion of the oscillating blade 2002 is located at the end of the oscillating blade 2002 away from the oscillating blade seat 2003. A connecting frame 2005 is provided at the end of the swinging blade seat 2003, away from the swinging blade 2002. This connecting frame 2005 rotatably engages the eccentric end of the eccentric shaft 2004. An external motor applies unidirectional rotation to the eccentric shaft 2004, which in turn drives the swinging blade seat 2003 to reciprocate, thereby driving the swinging blade head to reciprocate about its hinge axis.

[0127] Different usage scenarios require different lengths for the swinging blade. For example, in a long-handled swinging blade, the eccentric shaft 2004 is rotatably mounted on the end of the outer tube near the cutter head assembly. The drive assembly further includes a rotating shaft 2006 and a transmission shaft 2007. The rotating shaft 2006 is coaxially fixedly connected to the transmission shaft 2007. The end of the transmission shaft 2007 remote from the rotating shaft 2006 is coaxially fixedly connected to the end of the eccentric shaft 2004 remote from the swinging blade seat 2003. A mounting sleeve 2008 is provided at the end of the housing 2001 remote from the cutter head assembly. The rotating shaft 2006 is disposed within the mounting sleeve 2008. A mounting cylinder 2012 is fixedly disposed within the mounting sleeve 2008 on the side remote from the cutter head assembly. The rotating shaft 2006 is rotatably mounted within the mounting cylinder 2012 via a bearing. A structural support sleeve 2009 is provided between the transmission shaft 2007 and the housing 2001. A sealing sleeve 2010 is provided between the transmission shaft 2007 and the structural support sleeve 2009. One end of the structural support sleeve 2009 away from the rotating shaft 2006 is connected to a connecting sleeve 2011, and the eccentric shaft 2004 is rotatably arranged in the connecting sleeve 2011 through a bearing. The eccentric shaft 2004 is arranged at a position close to the cutter head assembly, which can improve the stability of the swing blade 2002 movement.

[0128] In a preferred embodiment: a water cooling channel is also integrated into the long-handled swing knife product, and a water injection channel is formed between the mounting sleeve 2008, the structural support sleeve 2009 and the connecting sleeve 2011 and the housing 2001. The opening of the water injection channel is located at the end of the connecting sleeve 2011 close to the cutter head assembly. The sealing sleeve 2010 arranged between the transmission shaft 2007 and the structural support sleeve 2009 can prevent cooling water from entering the drive assembly, thereby providing waterproof protection for the drive assembly. The water inlet of the water injection channel is located at the end of the mounting sleeve 2008 away from the cutter head assembly. A sealing ring 2013 is embedded on the inner wall of the mounting sleeve 2008 at the water inlet, and a sealing ring 2013 is also provided on the outer wall of the mounting cylinder 2012. It should be noted that the technical solution of this application does not limit the shape of the water injection channel formed between the mounting sleeve 2008 and the housing 2001. The first water injection channel can be linear or spiral, preferably spiral. In actual use, the shell 2001 of the external driving device can be extended between the mounting sleeve 2008 and the mounting tube 2012 for connection, and the external water source can enter the water injection channel through the water inlet of the water injection channel. The two sealing rings 2013 can prevent the water source from entering the driving component and protect the driving component.

[0129] In a preferred embodiment: in the short-handled swing knife, the water cooling channel is provided between the mounting sleeve 2008 and the shell 2001, and the water outlet of the water cooling channel can be directly provided on the outer tube.

[0130] In this embodiment, the unidirectional drive of the motor is converted into the reciprocating swing of the swing blade 2002 around the hinge axis through the eccentric shaft 2004 and the connecting frame 2005 on the swing blade seat 2003, thereby achieving the reciprocating cutting operation of the swing blade 2002. In addition, the eccentric shaft 2004 is positioned near the swing blade 2002, which can improve the stability of the reciprocating motion of the swing blade 2002. It should be noted that the reciprocating conversion mechanism formed by the eccentric shaft 2004 and the swing blade seat 2003 in the product of this embodiment will generate high temperatures when operated for a long time. When the coolant in the water-cooling channel passes through the position of the reciprocating conversion mechanism, it can absorb the heat generated by the reciprocating conversion mechanism, thereby improving the user experience.

[0131] Example 3

[0132] As shown in Figures 8 to 10, the reciprocating tool comprises a housing 3001, a cutter head assembly, and a drive assembly. The cutter head assembly includes a ring saw 3002. The drive assembly comprises an eccentric shaft 3003, a transmission rocker 3004, and a central transmission shaft 3005. The transmission rocker 3004 comprises a connecting frame and a transmission rod. The connecting frame is located at one end of the transmission rod axis. The eccentric shaft 3003 extends into the connecting frame and rotates with the connecting frame. The end of the transmission rod, distal from the connecting frame, is coaxially fixedly connected to one end of the central transmission shaft 3005. The other end of the central transmission shaft 3005 is fixedly connected to the ring saw 3002, and the working part of the ring saw 3002 extends out of the housing 3001. The rotation of the eccentric shaft 3003 drives the transmission rocker 3004 to swing back and forth. The transmission rocker 3004 drives the ring saw 3002 to swing back and forth through the central transmission shaft 3005.

[0133] Specifically, the housing 3001 consists of an outer shell and an outer tube. One end of the outer tube extends into the outer shell and is securely connected to the outer shell. The working end of the cutter head assembly extends from the end of the outer tube away from the outer shell. A mounting sleeve 3006 is provided at the end of the housing 3001 away from the cutter head assembly. The eccentric shaft 3003 and the transmission rocker 3004 are both disposed within the mounting sleeve 3006. A mounting barrel 3007 is fixedly disposed within the mounting sleeve 3006 on the side away from the cutter head assembly. The eccentric shaft 3003 is rotatably mounted within the mounting barrel 3007 via a bearing, with the eccentric end of the eccentric shaft 3003 extending out of the mounting barrel 3007. The other end of the eccentric shaft 3003 is provided with a connector capable of transmission connection with an external motor.

[0134] A water injection channel is formed between the mounting sleeve 3006 and the housing 3001. The water inlet of the water injection channel is located at the end of the mounting sleeve 3006 away from the cutter head assembly. A sealing ring 3008 is embedded and installed on the inner wall of the mounting sleeve 3006 at the water inlet. A sealing ring 3008 is also provided on the outer wall of the mounting cylinder 3007. It should be noted that the technical solution of this application does not limit the shape of the water injection channel formed between the mounting sleeve 3006 and the housing 3001. The water injection channel can be linear or spiral, preferably spiral. In actual use, the housing 3001 of the external drive device can be extended between the mounting sleeve 3006 and the mounting cylinder 3007 for connection, and an external water source can enter the water injection channel through the water inlet of the water injection channel. The two sealing rings 3008 can prevent the water source from entering the interior of the drive assembly, thereby protecting the drive assembly.

[0135] A mounting sleeve 3006 is provided at the end of the housing 3001 away from the cutter head assembly. The eccentric shaft 3003 is mounted within the mounting sleeve 3006. A structural support sleeve 3009 is provided between the central drive shaft 3005 and the housing 3001. A sealing sleeve 3010 is provided between the central drive shaft 3005 and the structural support sleeve 3009. The sealing sleeve 3010 seals the connection between the central drive shaft 3005 and the structural support sleeve 3009, providing waterproof protection for the drive assembly. A failure protection sleeve 3011 is provided between the central drive shaft 3005 and the housing 3001. The failure protection sleeve 3011 prevents the ring saw 3002 from falling if a failure occurs between the ring saw 3002 and the central drive shaft 3005, thereby improving user safety.

[0136] A water injection channel is formed between the mounting sleeve 3006 and the housing 3001. A through hole is provided on the central transmission shaft 3005, connecting the inner cavity of the central transmission shaft 3005 with the water injection channel. A water injection hole is provided inside the ring saw 3002, which communicates with the inner cavity of the central transmission shaft 3005. This allows water to be injected from the outside and then flow through the inside of the product to flush and cool the environment, thereby extending the service life of the ring saw 3002.

[0137] In a preferred embodiment, the blade head of the ring saw 3002 is a hollow ring, and the main body of the ring saw 3002 is provided with a weight-reducing window 3012 , which improves the stability of the movement of the ring saw 3002 .

[0138] In the technical solution of this embodiment, the unidirectional rotation of the motor input is converted into reciprocating rotation of the central transmission shaft 3005 via the eccentric shaft 3003 and the transmission rocker 3004, thereby achieving the reciprocating rotation of the ring saw 3002. The ring saw 3002 can also be cooled by injecting external cooling water. It should be noted that the reciprocating conversion mechanism formed by the eccentric shaft 3003, the transmission rocker 3004, and the central transmission shaft 3005 in this embodiment can generate high temperatures during long-term operation. The coolant in the water-cooling channel can absorb the heat generated by the reciprocating conversion mechanism when passing through the position of the reciprocating conversion mechanism, thereby improving the user experience.

[0139] Example 4

[0140] As shown in Figures 11 to 13, the reciprocating tool includes a shell 4001, a cutter head assembly and a drive assembly, the drive assembly includes an eccentric shaft 4002, a transmission collar 4003, an eccentric transmission shaft 4004 and a connecting shaft 4005, the cutter head assembly includes a milling cutter head 4006, the transmission collar 4003 includes a first ring portion and a second ring portion, the first ring portion is sleeved on the eccentric shaft 4002 and rotates with the eccentric shaft 4002, the eccentric transmission shaft 4004 extends into the second ring portion and rotates with the second ring portion, the end of the eccentric transmission shaft 4004 away from the transmission collar 4003 is transmission-connected to the connecting shaft 4005, the end of the connecting shaft 4005 away from the transmission shaft is transmission-connected to the milling cutter head 4006, the eccentric shaft 4002 rotates through the transmission collar 4003 to drive the eccentric transmission shaft 4004 to rotate, and then drives the milling cutter head 4006 to rotate reciprocatingly through the connecting shaft 4005.

[0141] Specifically, the housing 4001 is composed of an outer shell and an outer tube. One end of the outer tube extends into the outer shell and is tightly connected to the outer shell. The working end of the cutter head assembly extends from the end of the outer tube away from the outer shell. A mounting sleeve 4007 is provided at the end of the housing 4001 away from the cutter head assembly. The eccentric shaft 4002 and the transmission collar 4003 are both disposed within the mounting sleeve 4007. A mounting barrel 4008 is fixedly disposed within the mounting sleeve 4007 on the side away from the cutter head assembly. The eccentric shaft 4002 is rotatably mounted within the mounting barrel 4008 via a bearing, and the eccentric end of the eccentric shaft 4002 extends out of the mounting barrel 4008. The other end of the eccentric shaft 4002 is provided with a connector capable of being connected to an external motor. A first water injection channel is formed between the mounting sleeve 4007 and the housing 4001. The water inlet of the first water injection channel is located at the end of the mounting sleeve 4007 away from the cutter head assembly. A sealing ring 4009 is embedded and installed on the inner wall of the mounting sleeve 4007 at the water inlet. A sealing ring 4009 is also provided on the outer wall of the mounting tube 4008. It should be noted that the technical solution of this application does not limit the shape of the first water injection channel formed between the mounting sleeve 4007 and the housing 4001. The first water injection channel can be linear or spiral, preferably spiral. In actual use, the housing 4001 of the external drive device can be extended between the mounting sleeve 4007 and the mounting tube 4008 for connection, and an external water source can enter the interior of the first water injection channel through the water inlet of the first water injection channel. The two sealing rings 4009 can prevent the water source from entering the interior of the drive assembly, thereby protecting the drive assembly.

[0142] More specifically, a mounting sleeve 4007 is provided at one end of the housing 4001 away from the cutter head assembly. The eccentric shaft 4002 and the transmission collar 4003 are both disposed within the mounting sleeve 4007. The eccentric transmission shaft 4004 is transmission-connected to the connecting shaft 4005 via a structural tube 4010. A structural support sleeve 4011 is provided between the structural tube 4010 and the housing 4001. A sealing sleeve 4012 is provided between the central transmission shaft and the structural support sleeve 4011. The sealing sleeve 4012 seals the connection between the central transmission shaft and the structural support sleeve 4011, thereby providing sealed protection for the drive assembly.

[0143] A first water injection channel is formed between the mounting sleeve 4007 and the housing 4001, a second water injection channel is formed between the structural support sleeve 4011 and the housing 4001, and a third water injection channel is provided between the structural pipe 4010 and the housing 4001. The first, second, and third water injection channels are sequentially connected, and the outlet of the third water injection channel is located at the end of the structural pipe 4010 near the milling head 4006. This enables water injection from the outside, and water flows through the product internally to flush and cool the milling head 4006.

[0144] In a preferred embodiment: the end face and side face of the milling cutter head 4006 are provided with grinding teeth, and a connecting arc surface 4013 is provided between the grinding teeth on the end face of the milling cutter head 4006 and the grinding teeth on the side face of the milling cutter head 4006. The connecting arc surface 4013 can protect the patient's normal tissue during cutting and reduce the occurrence of miscutting. The middle part of the end face of the milling cutter head 4006 is concave, which improves the cutting effect of the milling cutter head 4006.

[0145] In this embodiment, the unidirectional rotation input by the external motor is converted into reciprocating rotation of the connecting shaft 4005 through the cooperation of the eccentric shaft 4002, the transmission collar 4003, and the eccentric transmission shaft 4004, thereby driving the reciprocating rotation of the milling cutter head 4006. A water injection channel is also provided to flush and cool the milling cutter head 4006, thereby increasing the service life of the milling cutter head 4006. The milling cutter head 4006 is designed with a concave structure in the middle of the end face, which improves the cutting effect. It should be noted that the reciprocating conversion mechanism formed by the cooperation of the eccentric shaft 4002, the transmission collar 4003, the eccentric transmission shaft 4004, and the connecting shaft 4005 in this embodiment will generate high temperature when operated for a long time. When the coolant in the water cooling channel passes through the position of the reciprocating conversion mechanism, it can absorb the heat generated by the reciprocating conversion mechanism, thereby improving the user experience.

[0146] Example 5

[0147] Please refer to Figures 15 to 19. The reciprocating sharpener for surgery in this application is the reciprocating tool in Example 1, including a cutter head 5100 and a drive conversion assembly for driving the cutter head 5100 to perform reciprocating rotational motion. The drive conversion assembly includes a transmission shaft 5210, an input shaft 5220 and an adapter. One end of the transmission shaft 5210 is connected to the cutter head 5100, and the other end is fixed with a first eccentric column 5211. The adapter includes a shift fork 5230 and a conversion connecting rod 5240. The first eccentric column 5211 is installed on the conversion connecting rod 52 40, a fork tip of the shift fork 5230 is connected to the other end of the conversion link 5240, a first bearing 5250 is installed in the fork mouth of the shift fork 5230, and a second eccentric column 5221 is fixed to one end of the input shaft 5220. The second eccentric column 5221 is eccentrically arranged with respect to the input shaft 5220, and the second eccentric column 5221 is inserted into the first bearing 5250. The shift fork 5230 cooperates with the first bearing 5250 and the conversion link 5240 to convert the unidirectional rotational motion of the input shaft 5220 into the reciprocating rotational motion of the transmission shaft 5210.

[0148] In a surgical reciprocating knife sharpener employing the above-described technical solution, the end of the input shaft 5220, distal from the second eccentric post 5221, is connected to the rotating shaft of an external motor. Upon activation of the external motor, the input shaft 5220 is driven by the external motor to rotate unidirectionally, causing the second eccentric post 5221 to rotate eccentrically. With the cooperation of the first bearing 5250, the shift fork 5230 swings back and forth in the circumferential direction, driving the conversion link 5240 to swing back and forth. This, in turn, drives the drive shaft 5210 to perform reciprocating rotational motion under the action of the first eccentric post 5211, thereby driving the cutter head 5100 to perform reciprocating rotational motion to grind bone tissue. This reciprocating rotational motion for grinding bone tissue facilitates uniform force distribution, a neat and stable grinding wound surface, smoother bone tissue treatment, effectively improving the grinding effect, and facilitating wound recovery. In the present invention, reciprocating rotational motion refers to the drive shaft 5210 or cutter head 5100 rotating in the forward direction for a certain angle, then in the reverse direction for a certain angle, then in the forward direction for a certain angle, and so on in a cycle.

[0149] In this embodiment, the cutter head 5100 has a handle 5110 , and the end of the transmission shaft 5210 close to the cutter head 5100 has a connecting hole 5212 , and the handle 5110 is fixedly inserted into the connecting hole 5212 to achieve a fixed connection between the transmission shaft 5210 and the cutter head 5100 .

[0150] In this embodiment, the reciprocating knife sharpener further includes a housing 5310, a transmission shaft 5210 passing through the housing 5310, a pin 5260 being inserted into the housing 5310, and a shift fork 5230 being rotatably mounted on the pin 5260. Specifically, a mounting hole 5231 is defined at the top of the fork opening of the shift fork 5230, and the pin 5260 is passed through the mounting hole 5231, so that the shift fork 5230 can be rotatably mounted on the pin 5260.

[0151] In this embodiment, the conversion link 5240 has insertion holes 5241 at opposite ends. A connecting post 5232 is fixed to one prong of the shift fork 5230. The connecting post 5232 is inserted into one insertion hole 5241, and the first eccentric post 5211 is inserted into the other insertion hole 5241. Therefore, when the shift fork 5230 swings back and forth in the circumferential direction, it can simultaneously drive the conversion link 5240 back and forth, and further, under the action of the first eccentric post 5211, drive the transmission shaft 5210 to reciprocate.

[0152] In this embodiment, the transmission shaft 5210 and the input shaft 5220 are coaxially arranged.

[0153] In this embodiment, the reciprocating knife sharpener further includes an interface housing 5320 and a housing sleeve 5330. The input shaft 5220 is disposed within the interface housing 5320. One end of the housing sleeve 5330 is sleeved onto the outer shell 5310, and the other end is sleeved onto the interface housing 5320. To ensure more stable rotation of the input shaft 5220, a second bearing 5270 is installed within the interface housing 5320. The second bearing 5270 is sleeved onto the end of the input shaft 5220 near the second eccentric post 5221.

[0154] In this embodiment, to enhance the rigidity and protect the transmission shaft 5210, an outer blade tube 5410 is sleeved over the transmission shaft 5210. The end of the outer blade tube 5410 away from the cutter head 5100 is inserted into the housing 5310. A support tube 5420 is also sleeved over the end of the transmission shaft 5210 near the cutter head 5100. The end of the support tube 5420 away from the cutter head 5100 is inserted into the outer blade tube 5410.

[0155] One end of the input shaft 5220 away from the second eccentric column 5221 is connected to the rotating shaft of the external motor. When the external motor is started, the input shaft 5220 performs unidirectional rotational motion, driving the second eccentric column 5221 to rotate eccentrically. The second eccentric column 5221 is inserted into the first bearing 5250, so that the first bearing 5250 slides in the fork of the shift fork 5230, driving the shift fork 5230 to swing back and forth in the circumferential direction. One fork tip of the shift fork 5230 is connected to the conversion link 5240, driving the conversion link 5240 to swing back and forth. The first eccentric column 5211 is inserted into the conversion link 5240, causing the transmission shaft 5210 to perform reciprocating rotational motion, and transmit it to the cutter head 5100 so that the cutter head 5100 also performs reciprocating rotational motion to grind bone tissue.

[0156] Example 6

[0157] Referring to Figures 20 to 25 , the reciprocating drive structure for a surgical tool of the present application, namely the reciprocating tool in Example 1, is configured to connect to a tool assembly 6001 and drive the tool assembly 6001 in reciprocating rotation. The reciprocating drive structure of this embodiment includes an eccentric rocker 6100, an eccentric shaft 6200, and a reciprocating conversion connecting rod 6300. The eccentric rocker 6100 is fixedly connected to the tool assembly 6001 and drives the tool assembly 6001 in reciprocating rotation. The eccentric rocker 6100 includes a first connecting rod 6110 and a first eccentric rod 6120, which are fixedly connected. The first connecting rod 6110 is eccentrically arranged relative to the first eccentric rod 6120. The eccentric shaft 6200 is in transmission connection with a drive motor. The eccentric shaft 6200 includes a second connecting rod 6210 and a second eccentric rod 6220, which are fixedly connected. The second connecting rod 6210 is eccentrically arranged relative to the second eccentric rod 6220, and the second connecting rod 6210 is in transmission connection with the rotating shaft of the drive motor. The eccentric rocker 6100 and the eccentric shaft 6200 are both installed on the reciprocating conversion link 6300, and the first connecting rod 6110 and the second connecting rod 6210 are respectively located on opposite sides of the reciprocating conversion link 6300. The unidirectional rotation of the eccentric shaft 6200 drives the reciprocating conversion link 6300 to rotate and drive the eccentric rocker 6100 to rotate reciprocatingly.

[0158] In this embodiment, the first connecting rod 6110 rotates back and forth, driving the tool assembly 6001 connected to the first connecting rod 6110 to rotate back and forth. The reciprocating rotation here means that the tool assembly 6001 or the first connecting rod 6110 rotates a certain angle around its own axis, then rotates a certain angle in the opposite direction, and then rotates a certain angle in the opposite direction, and so on, and the rotation is repeated in this cycle.

[0159] In this embodiment, when the eccentric rocker 6100 and the eccentric shaft 6200 are both mounted on the reciprocating conversion link 6300, the axis lines of the first connecting rod 6110 and the second connecting rod 6210 are parallel and do not overlap. The reciprocating conversion link 6300, which is connected to both the eccentric rocker 6100 and the eccentric shaft 6200, has two insertion holes 6310 located at opposite ends of the reciprocating conversion link 6300 for receiving the first eccentric rod 6120 and the second eccentric rod 6220, respectively. By inserting the first eccentric rod 6120 and the second eccentric rod 6220 into the corresponding insertion holes 6310, the eccentric rocker 6100 and the eccentric shaft 6200 are both mounted on the reciprocating conversion link 6300. Of course, other connection methods between the eccentric rocker 6100, the eccentric shaft 6200 and the reciprocating conversion connecting rod 6300 can also be selected, as long as the eccentric shaft 6200 can rotate in one direction to drive the reciprocating conversion connecting rod 6300 to rotate and drive the eccentric rocker 6100 to rotate reciprocatingly.

[0160] In this embodiment, the reciprocating conversion link 6300 has a simple structure, and the connection and matching structure between the eccentric rocker 6100 and the eccentric shaft 6200 is also simple. The reciprocating conversion link 6300 can be installed at a position close to the tool assembly 6001, and the first connecting rod 6110 in the eccentric rocker 6100 is directly connected to the tool assembly 6001 to shorten the distance of the reciprocating rotation transmission on the first connecting rod 6110, and the reciprocating rotation on the first connecting rod 6110 is directly transmitted to the tool assembly 6001, thereby more effectively realizing the reciprocating rotation of the tool assembly 6001.

[0161] In this embodiment, the second connecting rod 6210 is connected to a transmission shaft 6230, which is in driving connection with the shaft of the drive motor. Specifically, the transmission shaft 6230 is a hollow tubular structure, with the second connecting rod 6210 fixedly plugged into one end of the transmission shaft 6230. The end of the transmission shaft 6230 away from the eccentric shaft 6200 is connected to the input shaft 6400. The input shaft 6400 is connected to the shaft of the drive motor via a coupling. Rotation of the drive motor drives rotation of the input shaft 6400, which in turn drives rotation of the transmission shaft 6230. Rotation of the transmission shaft 6230, in turn, drives rotation of the eccentric shaft 6200.

[0162] In this embodiment, the first connecting rod 6110 is fixedly connected to the tool assembly 6001. This embodiment does not specifically limit the connection method between the first connecting rod 6110 and the tool assembly 6001. As long as the first connecting rod 6110 can be fixedly connected to the tool assembly 6001 and the reciprocating rotation of the first connecting rod 6110 can be realized to drive the reciprocating rotation of the tool assembly 6001, the connecting rod of the tool assembly 6001 can be fixedly inserted into the first connecting rod 6110, or the connecting rod of the tool assembly 6001 can be sleeved on the first connecting rod 6110.

[0163] In this embodiment, the reciprocating drive structure further includes a cutter head seat 6510. A first connecting rod 6110 is disposed within the cutter head seat 6510 and is capable of reciprocating within the cutter head seat 6510 while maintaining its axis. A first eccentric rod 6120 is located outside the cutter head seat 6510. Specifically, the cutter head seat 6510 has a through hole, and the first connecting rod 6110 is disposed within the through hole. One end of the first connecting rod 6110 extends through the cutter head seat 6510 for connection to the cutter assembly 6001, while the other end extends through the cutter head seat 6510 for connection to the first eccentric rod 6120. A first support tube 6520 is sleeved on the end of the first connecting rod 6110 that is closest to the cutter assembly 6001, and one end of the first support tube 6520 is inserted into the cutter head seat 6510.

[0164] In this embodiment, a bearing seat 6530 is provided on the outer side of the eccentric shaft 6200 , and a first bearing 6540 is installed on the second connecting rod 6210 , and the first bearing 6540 is installed in the bearing seat 6530 .

[0165] Under the rotation of the driving motor, the input shaft 6400 rotates to drive the transmission shaft 6230 to rotate, and then drives the eccentric shaft 6200 to rotate, drives the second eccentric rod 6220 to rotate eccentrically, drives the reciprocating conversion connecting rod 6300 to rotate, and the reciprocating conversion connecting rod 6300 drives the first eccentric rod 6120 to rotate, and then drives the first connecting rod 6110 to rotate reciprocatingly. The first connecting rod 6110 is connected to the tool assembly 6001, and the tool assembly 6001 follows the first connecting rod 6110 to rotate reciprocatingly.

[0166] The surgical tool of this embodiment is mainly an orthopedic tool, which is used to perform operations such as drilling and grinding on bones or tissues. Referring to Figures 22 to 25, the surgical tool of this embodiment includes a reciprocating drive structure and a tool assembly 6001, and the tool assembly 6001 is fixedly connected to the first connecting rod 6110 in the eccentric rocker 6100. The surgical tool of this embodiment also includes a water injection pipe 6600, which is inserted into the blade head seat 6510, and the water outlet end of the water injection pipe 6600 is located on the end surface of the blade head seat 6510 facing the tool assembly 6001. By passing water into the water injection pipe 6600, the tool assembly 6001 being operated can be rinsed and cooled, which is beneficial to improving the efficiency of the operation to a certain extent.

[0167] The surgical tool also includes an adapter sleeve assembly 710, a second support tube 6720 and a spiral water-cooling jacket 6730. One end of the second support tube 6720 is connected to the blade head seat 6510, and the other end is connected to the adapter sleeve assembly 710. The spiral water-cooling jacket 6730 is located inside the adapter sleeve assembly 710. A spiral channel 6731 is provided on the outer wall of the spiral water-cooling jacket 6730. The spiral channel 6731 is connected to the water injection pipe 6600, and the water injection pipe 6600 is arranged inside the second support tube 6720.

[0168] In this embodiment, the adapter sleeve assembly 710 includes an adapter tube 6711 and an outer shell, and the outer shell is mounted on the adapter tube 6711. One end of the second support tube 6720 is sleeved on the adapter tube 6711, and the other end is sleeved on the cutter head seat 6510. The bearing seat 6530 is mounted in the second support tube 6720. The spiral water cooling jacket 6730 is located in the outer shell, and the spiral channel 6731 on the outer wall of the spiral water cooling jacket 6730 and the inner wall of the outer shell constitute a partial water injection channel, and the transmission shaft 6230 is passed through the adapter tube 6711. Specifically, the outer shell includes a front shell 6712 and a rear shell 6713, one end of the front shell 6712 is inserted into the rear shell 6713, and one end of the rear shell 6713 is clamped on the outer wall of the front shell 6712. The rear housing 6713 is mounted on the spiral water-cooling jacket 6730. The front housing 6712 has a connecting hole 67120 at a position corresponding to the outlet of the spiral channel 6731. The water inlet end of the water injection pipe 6600 is inserted into the connecting hole 67120 and communicates with the spiral channel 6731. A second bearing 6800 is mounted on the input shaft 6400 and is located within the transfer tube 6711.

[0169] The surgical tool of this embodiment can be formed into a grinding tool by connecting a grinding tool assembly 6001 to a first connecting rod 6110, or can be formed into a drilling tool by connecting a drilling tool assembly 6001 to the first connecting rod 6110. The surgical tool of this embodiment, through the interaction of the eccentric shaft 6200, the reciprocating conversion link 6300, and the eccentric rocker 6100, can achieve reciprocating rotation of the first connecting rod 6110, thereby achieving reciprocating rotation of the tool assembly 6001, thereby performing operations such as grinding and drilling of bone and tissue. The first connecting rod 6110 is directly connected to the tool assembly 6001, and the reciprocating conversion link 6300 can be installed in a position close to the tool assembly 6001, which facilitates the effective transmission of the reciprocating rotation to the tool assembly 6001. During surgery, the surgical tool of this embodiment can be flushed, cooled and lowered by injecting water into the spiral channel 6731 on the outer wall of the spiral water-cooling jacket 6730, and then entering the water injection pipe 6600 through the connecting hole 67120 on the front shell 6712, and flowing out from the end face of the tool head seat 6510 through the water injection pipe 6600.

[0170] Example 7

[0171] 26 to 30, the orthopedic medical reciprocating drill bit of this embodiment is the reciprocating tool of the first embodiment, including a drill bit assembly, a drive assembly and a water injection channel 7300. The drill bit assembly is used to perform reciprocating rotation to punch bone tissue; the drive assembly is used to drive the drill bit assembly to perform reciprocating rotation. The drive assembly includes a reciprocating conversion rod 7210, a connecting sleeve 7220 and an input rod 7230. The reciprocating conversion rod 7210 is connected to the drill bit assembly, and the connecting sleeve 7220 is connected to the input rod 7230. One end of 0 is sleeved on the reciprocating conversion rod 7210, and the other end is sleeved on the input rod 7230. The input rod 7230 and the reciprocating conversion rod 7210 are eccentrically arranged. The rotation of the input rod 7230 drives the reciprocating conversion rod 7210 to perform reciprocating rotational motion; the water injection channel 7300 is used to spray water onto the punching position on the bone tissue. The reciprocating conversion rod 7210 is sleeved with an outer tube 7400, and the gap between the outer tube 7400 and the reciprocating conversion rod 7210 constitutes the water injection channel 7300.

[0172] Referring to Figure 30, the drill assembly includes a connecting rod 7110 and a drill body 7120 fixedly connected to the connecting rod 7110. The drill body 7120 includes a cone 7121 and a cylinder fixedly connected thereto. Preferably, the cone 7121 and the cylinder are integrally formed. The sidewalls of the cone 7121 and the cylinder are both provided with drill teeth 7130, and the end of the cone 7121 away from the cylinder has a tip. With the above technical solution, when drilling, the tip surface of the cone 7121 with the tip has a smaller contact area with the bone tissue, making it easier to achieve drilling. Since the sidewalls of the cone 7121 and the cylinder are both provided with drill teeth 7130, when the driving assembly drives the drill assembly to perform reciprocating rotational motion, drilling can be achieved quickly while avoiding entanglement with the surrounding soft tissue.

[0173] The end of the connecting rod 7110 closest to the drill body 7120 is connected to the cylindrical body, and the end of the connecting rod 7110 away from the drill body 7120 is inserted into the reciprocating conversion rod 7210. When the reciprocating conversion rod 7210 reciprocates, the connecting rod 7110 also reciprocates with the reciprocating conversion rod 7210, thereby reciprocating the drill body 7120. Specifically, the end of the reciprocating conversion rod 7210 closest to the drill body 7120 has an internal insertion hole, and the connecting rod 7110 is inserted into the insertion hole.

[0174] The reciprocating conversion rod 7210 includes a transmission rod 7211 and an eccentric column 7212. The eccentric column 7212 is eccentrically arranged with respect to the transmission rod 7211. An eccentric shaft 7231 is fixed to one end of the input rod 7230 close to the reciprocating conversion rod 7210. The eccentric shaft 7231 is eccentrically arranged with respect to the input rod 7230. One end of the connecting sleeve 7220 has a connecting hole 7221, and the other end has a mounting hole 7222. The eccentric column 7212 is tightly inserted into the connecting hole 7221, and the eccentric shaft 7231 is installed in the mounting hole 7222. A bearing 7500 is installed in the mounting hole 7222, and the bearing 7500 is fixedly sleeved on the eccentric shaft 7231. The input rod 7230 is connected to an external power mechanism, for example, the input rod 7230 is connected to a reducer connected to a motor. When the input rod 7230 rotates, the eccentric shaft 7231 at its end follows it to rotate eccentrically, driving the bearing 7500 in the mounting hole 7222 to slide in the mounting hole 7222 of the connecting sleeve 7220, thereby driving the connecting sleeve 7220 to make left and right reciprocating movements in the circumferential direction, and then transmitting power to the transmission rod 7211 through the eccentric column 7212, driving the transmission rod 7211 to perform reciprocating rotational motion, thereby realizing the reciprocating rotational motion of the drill bit assembly and preventing the drill body 7120 from rotating in one direction.

[0175] The reciprocating drill bit also includes a front shell 7610, a spiral water-cooling jacket 7620 and a rear shell 7630. The outer tube 7400 and the reciprocating conversion rod 7210 are both inserted into the front shell 7610. The outer wall of the spiral water-cooling jacket 7620 is provided with a spiral channel 7622 and a water injection groove 7621. The spiral channel 7622 and the water injection groove 7621 are connected. The front shell 7610 is provided with a water inlet hole 7611 connected to the interior. The water outlet end of the spiral channel 7622 is connected to the water inlet hole 7611. The water inlet hole 7611 is connected to the gap between the outer tube 7400 and the reciprocating conversion rod 7210. The rear shell 7630 is sleeved on the spiral water-cooling jacket 7620 and connected to the front shell 7610. The end of the outer tube 7400 away from the drill bit assembly has a water channel 7410. The water channel 7410 communicates with the interior of the outer tube 7400, and the water inlet 7611 communicates with the water channel 7410. Specifically, the water inlet 7611 is located within the range corresponding to the position of the water channel 7410. That is, water flowing through the water inlet 7611 passes through the water channel 7410 and enters the gap between the outer tube 7400 and the transmission rod 7211.

[0176] To enhance the sealing performance of the reciprocating drill bit of this embodiment, a sealing sleeve 7710 is mounted on the end of the transmission rod 7211 away from the drill bit assembly. A stopper sleeve 7720 and a bushing 7730 are mounted between the sealing sleeve 7710 and the transmission rod 7211. The stopper sleeve 7720 and the bushing 7730 are tightly mounted on the transmission rod 7211 to form a tight seal. The bushing 7730 is located close to the eccentric post 7212. The bushing 7730 also supports the sealing sleeve 7710.

[0177] To enhance the strength and toughness of the transmission rod 7211, a water pipe 7420 is sleeved onto the end of the transmission rod 7211 near the drill bit assembly. To facilitate water injection into the drill hole, one outer wall of the water pipe 7420 contacts the inner wall of the outer tube 7400, while the other outer wall forms a channel connecting to the outside. Specifically, a recessed groove can be provided on the other outer wall of the water pipe 7420, through which water flows. Alternatively, the water pipe can be formed into an arc-shaped sleeve and sleeved onto the transmission rod 7211, forming a structure with a notch on one side, through which water flows. The end of the water pipe 7420, remote from the drill body 7120, is inserted into the front housing 7610 and sealed to the front housing 7610 with glue.

[0178] In order to further enhance the sealing performance of the reciprocating drill bit of this embodiment, a groove 7612 is provided on the circumferential outer wall of the front shell 7610, and a retaining ring 7631 is provided on the rear shell 7630. The retaining ring 7631 is embedded in the groove 7612 to form a seal.

[0179] The reciprocating drill bit of this embodiment also includes an interface housing 7800, which is located in the spiral water-cooling jacket 7620 and is sleeved on the input rod 7230. In order to enable the input rod 7230 to achieve more stable rotational motion, a bearing spacer 7810 is provided in the input rod 7230 and the interface housing 7800. Bearings 7500 are installed at both ends of the bearing spacer 7810, and the bearings 7500 here are sleeved on the input rod 7230.

[0180] When the reciprocating drill bit of this embodiment is drilling, the input rod 7230 rotates under the drive of the external power mechanism, and the eccentric shaft at its end rotates eccentrically with it, driving the bearing in the mounting hole to slide in the mounting hole 7222 of the connecting sleeve 7220, thereby driving the connecting sleeve 7220 to make left and right reciprocating movements in the circumferential direction, and then transmitting power to the transmission rod 7211 through the eccentric column 7212, driving the transmission rod 7211 to make reciprocating rotational motion, thereby realizing the reciprocating rotational motion of the drill bit assembly, avoiding the problem of easy entanglement of the surrounding soft tissue due to unidirectional rotation of the drill body 7120.

[0181] The reciprocating drill bit of this embodiment can inject water into the interior of the reciprocating drill bit through the water injection groove 7621 through an external water injection mechanism during drilling operation, and then flow out through the outer tube 7400. Specifically, the water in the water injection groove 7621 enters the water inlet through the spiral channel 7622, ​​flows into the gap between the outer tube 7400 and the transmission rod 7211 through the water inlet hole and the water groove, and finally flows out from the end of the outer tube 7400 close to the drill body 7120, flushing and cooling the drilling position, thereby improving the drilling efficiency.

[0182] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0183] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A reciprocating tool, characterized in that: It includes a cutter head assembly and a driving assembly. The driving assembly is transmission-connected to the cutter head assembly, and the driving assembly drives the cutter head assembly to perform reciprocating motion.

2. A reciprocating tool, characterized in that: The utility model comprises a housing, a cutter head assembly and a drive assembly, wherein the drive assembly comprises an eccentric shaft, an articulated connector and a transmission rod, wherein the eccentric shaft, the articulated connector, the transmission rod and the cutter head assembly are all disposed in the housing, and the working end of the cutter head assembly extends out of the housing; The articulated connector includes a connecting frame and a swinging lever, the articulated connector is rotatably mounted in the housing, one end of the eccentric shaft extends into the connecting frame and rotatably engages with the connecting frame, the swinging lever is hingedly connected to one end of the transmission rod, and the other end of the transmission rod is transmission-connected to the cutter head assembly; The rotation of the eccentric shaft drives the articulated connector to swing back and forth around its articulated axis, and the swing rod on the articulated connector drives the transmission rod to perform reciprocating linear motion along the transmission rod axis.

3. The reciprocating tool according to claim 2, wherein: The cutter head assembly includes a saw blade, a cutter head seat and a connecting rod, one end of the connecting rod is coaxially fixedly connected to the transmission rod, the other end of the connecting rod is coaxially fixedly connected to the cutter head seat, the saw blade is fixedly mounted on the end of the cutter head seat away from the connecting rod, and the saw blade extends out of the shell.

4. The reciprocating tool according to claim 3, wherein: A mounting sleeve is provided at one end of the shell away from the cutter head assembly, and the eccentric shaft and the articulated connector are both arranged in the mounting sleeve. A first water injection channel is formed between the mounting sleeve and the shell, a second water injection channel is formed between the connecting rod and the shell, and a third water injection channel is formed between the cutter head seat and the shell. The first water injection channel, the second water injection channel and the third water injection channel are connected in sequence.

5. The reciprocating tool according to claim 3, wherein: A support sleeve is provided between the housing and the connecting rod. A sealing sleeve is provided on one end of the support sleeve away from the hinged connector. The sealing sleeve seals the connection between the support sleeve and the connecting rod.

6. The reciprocating tool according to claim 3, wherein: The saw blade body is of uniform thickness, and the cutter head seat is provided with an axial mounting groove, in which one end of the saw blade is embedded; The outer surface of the cutter head seat is provided with a rectangular section, a connecting sleeve is provided between the cutter head seat and the shell, and a third water injection channel is formed between the rectangular section of the cutter head seat and the connecting sleeve.

7. A reciprocating tool, characterized in that: The utility model comprises a housing, a cutter head assembly and a drive assembly, wherein the cutter head assembly comprises an oscillating blade and an oscillating blade seat, wherein the oscillating blade is fixedly connected to the oscillating blade seat, the oscillating blade and / or the oscillating blade seat are hingedly connected to the housing, and the end of the oscillating blade away from the oscillating blade seat extends out of the housing; The driving assembly includes an eccentric shaft, and a connecting frame is formed at one end of the swinging blade seat away from the swinging blade. The eccentric shaft extends into the connecting frame and rotates with the connecting frame. The rotation of the eccentric shaft drives the end of the swinging blade extending out of the shell to swing back and forth around the hinge shaft.

8. The reciprocating tool according to claim 7, wherein: The driving assembly further comprises a rotating shaft and a transmission shaft, wherein the rotating shaft is coaxially fixedly connected to the transmission shaft, and an end of the transmission shaft away from the rotating shaft is coaxially fixedly connected to an end of the eccentric shaft away from the swinging knife seat.

9. The reciprocating tool according to claim 8, wherein: A mounting sleeve is provided at one end of the housing away from the cutter head assembly, the rotating shaft is provided in the mounting sleeve, a structural support sleeve is provided between the transmission shaft and the housing, and a sealing sleeve is provided between the transmission shaft and the structural support sleeve; The end of the structural support sleeve away from the rotating shaft is connected to a connecting sleeve, and the eccentric shaft is rotatably arranged in the connecting sleeve; A communicating water injection channel is formed between the mounting sleeve, the structural support sleeve and the connecting sleeve and the shell. The opening of the water injection channel is located at one end of the connecting sleeve close to the cutter head assembly.

10. A reciprocating tool, characterized in that: It includes a housing, a cutter head assembly and a drive assembly, wherein the cutter head assembly includes a ring saw, the drive assembly includes an eccentric shaft, a transmission rocker and a central transmission shaft, the transmission rocker includes a connecting frame and a transmission rod, the connecting frame is located at one end of the transmission rod axis, the eccentric shaft extends into the connecting frame and rotates with the connecting frame, and the end of the transmission rod away from the connecting frame is coaxially fixedly connected to one end of the central transmission shaft; The other end of the central transmission shaft is fixedly connected to the ring saw, and the working part of the ring saw extends out of the housing; The rotation of the eccentric shaft drives the transmission rocker to swing back and forth, and the transmission rocker drives the ring saw to rotate back and forth through the central transmission shaft.

11. The reciprocating tool according to claim 10, wherein: A mounting sleeve is provided at one end of the housing away from the cutter head assembly, the eccentric shaft is provided in the mounting sleeve, a structural support sleeve is provided between the central transmission shaft and the housing, and a sealing sleeve is provided between the central transmission shaft and the structural support sleeve; A failure protection sleeve is provided between the central transmission shaft and the housing; A water injection channel is formed between the mounting sleeve and the shell, a through hole is provided on the central transmission shaft to connect the inner cavity of the central transmission shaft with the water injection channel, and a water injection hole is provided inside the ring saw, and the water injection hole is connected to the inner cavity of the central transmission shaft.

12. The reciprocating tool according to claim 11, wherein: The cutter head of the ring saw is hollow and annular, and the main body of the ring saw is provided with a weight-reducing window.

13. A reciprocating tool, characterized in that: It includes a housing, a cutter head assembly and a drive assembly, the drive assembly includes an eccentric shaft, a transmission collar, an eccentric transmission shaft and a connecting shaft, the cutter head assembly includes a milling cutter head, the transmission collar includes a first ring portion and a second ring portion, the first ring portion is sleeved on the eccentric shaft and rotates with the eccentric shaft, the eccentric transmission shaft extends into the second ring portion and rotates with the second ring portion, and the end of the eccentric transmission shaft away from the transmission collar is transmission-connected to the connecting shaft; One end of the connecting shaft away from the transmission shaft is transmission-connected to the milling cutter head; The rotation of the eccentric shaft drives the eccentric transmission shaft to rotate through the transmission collar, and then drives the milling cutter head to rotate back and forth through the connecting shaft.

14. The reciprocating tool according to claim 13, wherein: The end face and side face of the milling cutter head are provided with grinding teeth, and a connecting arc surface is provided between the grinding teeth on the end face of the milling cutter head and the grinding teeth on the side face of the milling cutter head; The middle portion of the end surface of the milling cutter head is concave.

15. The reciprocating tool according to claim 13, wherein: A mounting sleeve is provided at one end of the housing away from the cutter head assembly, the eccentric shaft and the transmission collar are both provided in the mounting sleeve, the eccentric transmission shaft is transmission-connected to the connecting shaft via a structural tube, a structural support sleeve is provided between the structural tube and the housing, and a sealing sleeve is provided between the central transmission shaft and the structural support sleeve; A first water injection channel is formed between the mounting sleeve and the shell, a second water injection channel is formed between the structural support sleeve and the shell, and a third water injection channel is arranged between the structural pipe and the shell. The first water injection channel, the second water injection channel and the third water injection channel are connected in sequence, and the water outlet of the third water injection channel is located at one end of the structural pipe close to the milling cutter head.

16. A surgical reciprocating knife sharpener, characterized in that: The drive conversion assembly includes a cutter head and a driving cutter head for performing reciprocating rotational motion, the drive conversion assembly includes 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 includes 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.

17. The surgical reciprocating sharpener according to claim 16, wherein: The reciprocating knife sharpener further comprises a housing, the transmission shaft is passed through the housing, a pin is plugged into the housing, and the shift fork is rotatably mounted on the pin; The conversion link has plug holes at opposite ends, a connecting column is fixed on one fork tip of the shift fork, the connecting column is plugged into one plug hole, and the first eccentric column is plugged into the other plug hole; The transmission shaft and the input shaft are coaxially arranged; The reciprocating knife sharpener further comprises an interface housing and a housing sleeve, wherein the input shaft is inserted into the interface housing, one end of the housing sleeve is sleeved on the outer shell, and the other end is sleeved on the interface housing; 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; 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.

18. A reciprocating drive structure for a surgical tool, characterized in that: Used to connect with the tool assembly and drive the tool assembly to rotate back and forth, the reciprocating drive structure includes: an eccentric rocker fixedly connected to the tool assembly and driving the tool assembly to rotate back and forth, the eccentric rocker comprising a first connecting rod and a first eccentric rod fixedly connected, the first connecting rod and the first eccentric rod being eccentrically arranged; an eccentric shaft, drivingly connected to the drive motor, the eccentric shaft comprising a second connecting rod and a second eccentric rod fixedly connected, the second connecting rod being eccentrically arranged to the second eccentric rod, and the second connecting rod being drivingly connected to the rotating shaft of the drive 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 rotate reciprocatingly.

19. The reciprocating drive structure for a surgical tool according to claim 18, wherein: The second connecting rod is connected to a transmission shaft, and the transmission shaft is in transmission connection with a shaft of a driving motor; The reciprocating drive structure further includes a cutter head seat, wherein the first connecting rod is provided in the cutter head seat and can reciprocate in the cutter head seat while keeping the axis unchanged, and the first eccentric rod is located outside the cutter head seat; 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; A bearing seat is provided 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.

20. A surgical tool, characterized in that: The surgical tool comprises a reciprocating drive structure and a tool assembly according to any one of claims 18 or 19, wherein the surgical tool further comprises a water injection pipe, the water injection pipe being passed through the tool head seat, the water outlet end of the water injection pipe being located on the end surface of the tool head seat facing the tool assembly; The surgical tool further includes an adapter sleeve assembly, a second support tube and a spiral water cooling jacket, wherein one end of the second support tube is connected to the cutter head seat and the other end is connected to the adapter sleeve assembly, the spiral water cooling jacket is located within the adapter sleeve assembly, and the outer wall of the spiral water cooling jacket has a spiral channel, the spiral channel is connected to a water injection pipe, and the water injection pipe is disposed within the second support tube; 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 inside 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. The transmission shaft is passed through the adapter tube.

21. Orthopedic medical reciprocating drill bit, characterized by: include: A drill assembly, used for performing reciprocating rotational motion to drill holes in bone tissue; A drive assembly is used to drive the drill assembly to perform reciprocating rotational motion. The drive assembly includes a reciprocating conversion rod, a connecting sleeve, and an input rod. The reciprocating conversion rod is connected to the drill assembly. One end of the connecting sleeve is sleeved on the reciprocating conversion rod, and the other end is sleeved on the input rod. The input rod and the reciprocating conversion rod are eccentrically arranged. The rotation of the input rod drives the reciprocating conversion rod to perform reciprocating rotational motion. The water injection channel is used to spray water onto the punching position on the bone tissue. An outer tube is sleeved on the reciprocating conversion rod, and the gap between the outer tube and the reciprocating conversion rod constitutes the water injection channel.

22. The orthopedic medical reciprocating drill bit according to claim 21, wherein: The drill bit assembly includes a connecting rod and a drill body fixedly connected to the connecting rod, and the drill body includes a cone and a cylinder fixedly connected; The side walls of the cone and the cylinder are both provided with drill teeth; the end of the connecting rod close to the drill body is connected to the cylinder, and the end of the connecting rod away from the drill body is inserted into the reciprocating conversion rod; The reciprocating conversion rod includes a transmission rod and an eccentric column, the eccentric column is eccentrically arranged with the transmission rod, an eccentric shaft is fixed to one end of the input rod close to the reciprocating conversion rod, the eccentric shaft is eccentrically arranged with the input rod, one end of the connecting sleeve has a connecting hole, and the other end has a mounting hole, the eccentric column is passed through the connecting hole, the eccentric shaft is mounted in the mounting hole, a bearing is installed in the mounting hole, and the bearing sleeve is mounted on the eccentric shaft; The reciprocating drill bit further includes a front housing, a spiral water-cooling jacket, and a rear housing. The outer tube and the reciprocating conversion rod are both disposed within the front housing. The outer wall of the spiral water-cooling jacket has a spiral channel. The front housing has a water inlet connected to the interior. The water outlet end of the spiral channel is connected to the water inlet. The water inlet is connected to the gap between the outer tube and the reciprocating conversion rod. The rear housing is sleeved on the spiral water-cooling jacket and connected to the front housing. The outer tube has a water groove at one end away from the drill bit assembly, the water groove is communicated with the interior of the outer tube, and the water inlet hole is communicated with the water groove; A sealing sleeve is sleeved on one end of the transmission rod away from the drill bit assembly, and a retaining sleeve is sleeved between the sealing sleeve and the transmission rod; A water pipe is sleeved on one end of the transmission rod close to the drill bit assembly, wherein the outer wall of one side of the water pipe contacts the inner wall of the outer tube, and the outer wall of the other side forms a channel communicating with the outside with the inner wall of the outer tube; A clamping groove is provided on the circumferential outer wall of the front shell, and a clamping ring is provided on the rear shell. The clamping ring is embedded in the clamping groove to form a seal.

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