CN110200729B

CN110200729B - A special composite bone crushing device for spinal surgery

Info

Publication number: CN110200729B
Application number: CN201910649286.9A
Authority: CN
Inventors: 刘汝银; 岳宗进; 于露; 王新立; 冯仲锴; 王西彬; 邵同德
Original assignee: Henan University of Traditional Chinese Medicine HUTCM
Current assignee: Henan University of Traditional Chinese Medicine HUTCM
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2021-04-06
Anticipated expiration: 2039-07-18
Also published as: CN110200729A

Abstract

The invention provides a special composite bone crushing device for spinal surgery, which solves the problem that the bone particles cut out in the prior art are not uniform and have spurs; the bone powder cannot be obtained. The utility model includes a main body and a knife holder shell, and is characterized in that a rotating rod is arranged in the main body, an L-shaped knife rest is arranged on the rotating rod, and the L-shaped knife rest is provided with a reamer rest, a cutter rest, a knife sharpening rest, and the rotating shafts of the three tool rests. There is a driven connecting plate on the top, a motor base on the rotating rod, a motor on the motor base, an active connecting plate on the motor shaft, a driving bevel gear on the rotating rod, a driven bevel gear in the main body, and the right side of the driven bevel gear There is a one-way wheel and a cam, a torsion spring is installed between the cam and the main body, a positioning groove is arranged on the top of the main body, and a positioning block is arranged in the positioning groove. The invention can quickly crush the bones through the rotating tool holder, and obtain broken bone powder; the cam and the positioning block can make the tool holder accurately position; Bone work just got easier.

Description

Special compound bone crushing device of spinal surgery

Technical Field

The invention relates to the technical field of medical instruments, in particular to a special composite bone crushing device for spinal surgery.

Background

The spine is formed by the joining of different vertebral bodies by an anterior disc and two posterior facet joints that allow the spine to bend and twist, which may become worn or degenerate with age or trauma, causing pain. It is necessary to stabilize the arthritic site of the spine by medication or surgery, and if physical and medical treatment fails to control pain, surgical treatment is necessary, but various internal fixations, which establish temporary stabilization, must be gradually weakened over time, and the stability established by the internal fixations must be lost, which requires permanent stabilization by spinal fusion surgery.

In the spine fusion operation, the bone taken out from other parts of the patient needs to be cut into small particles, the obtained bone particles are used for filling and supporting between adjacent vertebras, and finally, small gaps among the bone particles are filled with bone powder so as to achieve the aim of curing and relieving the patient.

However, the above-mentioned method of crushing the spine has the following disadvantages:

1. bone that is cut using rongeurs or surgical scissors is not uniform in particle size;

2. some particles cut by the existing bone-breaking method have spurs, and the particles can cause pain to patients after being filled into the spine;

3. the existing bone crushing device has single function, only can be cut into granular bone fragments, and can obtain bone powder by using other tools;

4. when the bone breaking forceps or the surgical scissors are used for breaking bones, the bone breaking forceps or the surgical scissors need to be held tightly by hands, so that time and labor are wasted, and broken bones are easy to splash around;

therefore, the invention provides a special composite bone crushing device for spinal surgery to solve the problems.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the special composite bone crushing device for the spinal surgery, which effectively solves the problem that bone particles are not uniform under the condition of bone crushing forceps or operation shearing in the prior art; the cut bone particles have spurs; the function is single, and the bone powder cannot be obtained; waste time and labor, and easily cause the problem that broken bones are scattered all around.

A special composite bone crushing device for spinal surgery comprises a main body with a cavity inside and a knife rest shell fixed above the main body, and is characterized in that a rotating rod is installed in the main body in a rotating mode, one end of the rotating rod extends into the knife rest shell and is fixedly provided with three L-shaped knife rests, a reamer rest, a cutter rest and a grinder rest are installed on the three L-shaped knife rests in a rotating mode and in a sliding mode respectively, driven connecting discs located on the inner sides of the L-shaped knife rests are fixedly installed on rotating shafts of the reamer rest, the cutter rest and the grinder rest respectively, a motor base located above the L-shaped knife rest is sleeved on the rotating rod, a motor is fixedly installed on the motor base, a driving connecting disc is installed on a rotating shaft of the motor, a driving bevel gear located in the main body is fixedly installed on the rotating rod, a driven bevel gear meshed with the driving bevel gear is installed on the inner wall of the main body, the right side coaxial arrangement of one-way wheel has the cam, installs the reset torsion spring between cam and the main part, and open at the top of main part has the constant head tank that is located the cam top and runs through knife rest housing bottom, and slidable mounting has the locating piece in the constant head tank.

Preferably, the three L-shaped tool rests comprise tool rest sleeves fixedly mounted on the rotating rod, the three L-shaped tool rests are integrally connected to the outer contour surface of each tool rest sleeve, and the top of each three L-shaped tool rest is respectively and integrally connected with a tool rest cross beam.

Preferably, a plurality of protrusions are integrally connected to the contact surfaces of the driven connecting disc and the driving connecting disc, and the plurality of protrusions can connect the driven connecting disc and the driving connecting disc.

Preferably, the reamer frame, including the reamer shell, two reamers, two are installed to reamer shell internal rotation the one end of the pivot of reamer is run through the reamer shell and is rotated respectively and slidable mounting in the knife rest crossbeam, installs driven connection pad in one of them reamer pivot, two coaxial mounting has reamer driving gear and reamer driven gear respectively in the left side of reamer, all overlaps in two reamer pivots to have the knife rest reset spring who is located between reamer shell and the knife rest crossbeam, and the right side an organic whole of reamer shell is connected with the circular arc briquetting.

Preferably, the cutter frame comprises a cutter shell, wherein two cutters are installed in the cutter shell in a rotating mode, one ends of rotating shafts of the cutters penetrate through the cutter shell to rotate respectively and are installed in a cutter frame cross beam in a sliding mode, a driven connecting disc is installed on one cutter rotating shaft, the two cutters are coaxially installed on the left side of each cutter, a cutter driving gear and a cutter driven gear are installed on the left side of each cutter, a cutter frame reset spring located between the cutter shell and the cutter frame cross beam is sleeved on each cutter rotating shaft, and an arc pressing block is integrally connected to the right side of the cutter shell.

Preferably, the knife sharpening frame comprises a sharpening shell, two sharpening rollers and two sharpening driving pulleys are installed in the sharpening shell in a rotating mode, one end of a rotating shaft of each sharpening roller runs through the sharpening shell to rotate and be installed in a knife rest cross beam in a sliding mode respectively, a driven connecting disc and two driven connecting discs are installed in one sharpening rotating shaft, a sharpening driving pulley and a sharpening driven pulley are coaxially installed on the left side of each sharpening roller respectively, a driving belt is installed on each sharpening driving pulley and each sharpening driven pulley, a knife rest reset spring located between the sharpening shell and the knife rest cross beam is sleeved on each sharpening rotating shaft, and an arc pressing block is integrally connected to the right side of the.

Preferably, two positioning rods are installed at the top in the main body, the positioning blocks are boss-shaped and are slidably installed on the two positioning rods, and return springs located between the positioning blocks and the main body are installed on the two positioning rods.

Preferably, motor base is last to be opened there is the motor mounting groove, and slidable mounting has the motor mounting panel in the motor mounting groove, installs the motor on the motor mounting panel, installs motor reset spring between motor mounting panel and the motor mounting groove.

Preferably, install circular-arc fixed pressing block on the knife rest shell inner wall, open at the top of knife rest shell has the feed inlet, and it has the receiver installing port to open on the right-hand member face of knife rest shell, and the receiver has been placed to the slip in the receiver installing port, rotatory handle is installed at the top of bull stick.

According to the invention, through the three tool rests which can be rotatably adjusted, bones can be rapidly and uniformly crushed, and powdery crushed bones can be obtained; through the one-way wheel, the cam and the positioning block, each tool rest can be accurately connected with the motor; through the cooperation of the fixed pressing block, the arc pressing block and the connecting disc, the connection and disconnection between each tool rest and the motor are realized, and the bone crushing work can be more easily and conveniently carried out.

Drawings

Fig. 1 is a first perspective view of the present invention.

Fig. 2 is a perspective view of the second embodiment of the present invention.

FIG. 3 is a schematic cross-sectional perspective view of the present invention.

Fig. 4 is a third perspective view of the present invention.

Fig. 5 is a perspective view of the reamer head of the present invention.

Fig. 6 is a perspective view of the cutting blade holder of the present invention.

Fig. 7 is a perspective view of a blade carrier according to the present invention.

Fig. 8 is a perspective view of the L-shaped tool holder of the present invention.

Fig. 9 is a perspective view of the motor base of the present invention.

Fig. 10 is a perspective view illustrating the motor installation according to the present invention.

Fig. 11 is a perspective view of the positioning block of the present invention.

FIG. 12 is a perspective view of a cartridge housing of the present invention.

Detailed Description

The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 12. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The invention discloses a special composite bone crushing device for spinal surgery, which comprises a main body 1 with a cavity inside and a knife rest shell 2 fixed above the main body 1, wherein the main body 1 and the knife rest shell 2 can be fixed by welding or other connection modes, and is characterized in that a rotating rod 3 which is vertical and penetrates through the knife rest shell 2 is rotatably installed in the main body 1, the rotating rod 3 can rotate in the main body 1 and the knife rest shell 2, three L-shaped knife rests 5 are uniformly and fixedly installed on the rotating rod 3, the three L-shaped knife rests 5 can rotate along with the rotating rod 3, a reamer rest 7, a cutter rest 8 and a grinding rest 9 are respectively rotatably and slidably installed on the three L-shaped knife rests 5, rotating shafts of the reamer rest 7, the cutter rest 8 and the grinding rest 9 can rotate in the L-shaped knife rest 5 and can also slide in the L-shaped knife rest 5, and the reamer rest 7, The rotary shafts of the cutter frame 8 and the grinder frame 9 are respectively fixedly provided with a driven connecting disc 10 positioned at the inner side of the L-shaped cutter frame 5, the rotary shafts of the cutter frame 7, the cutter frame 8 and the grinder frame 9 can rotate together by rotating the driven connecting disc 10, the rotary rod 3 is sleeved with a motor base 11 positioned above the L-shaped cutter frame 5, the motor base 11 is fixedly connected with the cutter frame shell 2, a plurality of fixing rods can be fixed on the upper end surface of the motor base 11, the other ends of the fixing rods can be fixed on the cutter frame shell 2, welding can be adopted at the position, other common connection modes can be adopted, a motor 12 is fixedly arranged on the motor base 11, bolt fixing can be adopted at the position, other connection modes can be adopted, the motor 12 is connected with a power supply source, a driving connecting disc 13 is arranged on the rotary shaft of the motor 12, the driving connecting disc 13 rotates along with the rotary shaft of the motor, the connecting and disconnecting of the driving connecting disc 13 and the driven connecting disc 10 can be realized, when the driving connecting disc 13 is connected with the driven connecting disc 10, the motor 12 can drive the reamer holder 7 or the cutter holder 8 or the grinding cutter holder 9 to rotate, the rotating rod 3 is fixedly provided with the driving bevel gear 17 positioned in the main body 1, the driving bevel gear 17 rotates along with the rotating rod 3, the inner wall of the main body 1 is rotatably provided with the driven bevel gear 18 meshed with the driving bevel gear 17, the driving bevel gear 17 drives the driven bevel gear 18 to rotate, the axis of the driven bevel gear 18 is vertical to the axis of the driving bevel gear 17, the right side of the driven bevel gear 18 is coaxially provided with the one-way wheel 19, the one-way wheel 19 only can rotate along with the driven bevel gear 18 in one direction and can rotate in the other direction, the right side of the one-way wheel 19 is coaxially provided with the cam 20, and the cam 20 can, the cam 20 is connected with the one-way wheel 19, the one-way wheel 19 can drive the cam 20 to rotate together with the driven bevel gear 18 when rotating, a reset torsion spring 21 is arranged between the cam 20 and the main body 1, after the cam 20 rotates along with the one-way wheel 19, the cam 20 drives the one-way wheel 19 to rotate in the opposite direction under the action of the reset torsion spring 21, so as to realize the reset of the cam 20, the top of the main body 1 is provided with a positioning groove 22 which is positioned above the cam 20 and penetrates through the bottom of the knife rest shell 2, a positioning block 23 is arranged in the positioning groove 22 in a sliding manner, the positioning block 23 can slide up and down in the positioning groove 22, the cam 20 is positioned below the positioning block 23, the cam 20 is matched with the positioning block 23, so as to realize the up-and-down motion of the positioning block 23, when the rotating rod 3 is rotated, the rotating rod 3 drives the L-shaped knife, when one L-shaped tool rest 5 reaches a required position, the cam 20 simultaneously jacks up the positioning block 23, the positioning block 23 abuts against the L-shaped tool rest 5, so that the tool rest is quickly and accurately positioned, when the positioning block 23 abuts against the L-shaped tool rest 5, the switched driven connecting disc 10 on the tool rest rotating shaft is simultaneously connected with the driving connecting disc 13 on the motor rotating shaft, and at the moment, the cam 20 drives the one-way wheel 19 to reversely reset under the action of the reset torsion spring 21.

In the second embodiment, on the basis of the first embodiment, three L-shaped tool rests 5 include a tool rest sleeve 4 fixedly mounted on the rotating rod 3, the tool rest sleeve 4 rotates along with the rotating rod 3, three L-shaped tool rests 5 are integrally connected to the outer contour surface of the tool rest sleeve 4, the three L-shaped tool rests 5 are uniformly distributed on the outer contour surface of the tool rest sleeve 4, the top portions of the three L-shaped tool rests 5 are respectively and integrally connected with a tool rest cross beam 6, two tool rest shaft mounting holes are formed in the tool rest cross beam 6, and rotating shafts of the three tool rests can rotate in the tool rest shaft mounting holes and can slide in the tool rest shaft mounting holes.

In the third embodiment, on the basis of the first embodiment, a plurality of protrusions are uniformly connected to the contact surfaces of the driven connecting disc 10 and the driving connecting disc 13, the protrusions are arc-shaped, when the driven connecting disc 10 is connected with the driving connecting disc 13, the protrusions are engaged with each other in a staggered manner, the planes on the protrusions are contacted with each other, the driving connecting disc 13 rotates to drive the driven connecting disc 10 to rotate, so that power transmission is realized, when a tool rest needs to be switched, the motor 12 is stopped first, the driving connecting disc 13 stops rotating, the driven connecting disc 10 continues to rotate for a certain time due to inertia, the arc surfaces of the protrusions are contacted with each other at the moment, so that the driving connecting disc 13 is separated from the driven connecting disc 10, and at the moment, the rotating rod 3 is rotated to switch the.

In the fourth embodiment, on the basis of the third embodiment, the reamer holder 7 includes a reamer housing 701, the reamer housing 701 is a square housing which is through from top to bottom, two reamers 702 are rotatably installed in the reamer housing 701, the two reamers 702 can rotate in the reamer housing 701, and the two reamers 702 are mutually matched and leave a small gap, when the two reamers 702 rotate, the bone can be twisted into powder, so as to obtain powdered broken bone, one end of the rotating shaft of the two reamers 702 penetrates through the reamer housing 701 to respectively rotate and be slidably installed in a holder shaft installation hole on a holder beam 6, the rotating shaft of the two reamers 702 can only rotate in the reamer housing 701, the rotating shaft of the two reamers 702 can both rotate in the holder shaft installation hole and can drive the reamer housing 701 to slide in the holder shaft installation hole, a driven connection disc 10 is installed on the rotating shaft of one of the reamers 702, a reamer driving gear 704 and a reamer driven gear 705 are coaxially installed on the left sides of the two reamers 702 respectively, when one reamer rotating shaft is driven by the driven connecting disc 10 to rotate clockwise, the reamer driving gear 704 also rotates clockwise, the reamer driven gear 705 meshed with the reamer driving gear 704 drives the other reamer 702 to rotate anticlockwise, the rotating directions of the two reamers 702 are opposite, so that bones are extruded towards the middle, the effect of mincing bones is achieved, tool rest reset springs 15 located between the reamer shell 701 and the tool rest cross beam 6 are sleeved on the rotating shafts of the two reamers 702, when the reamer shell 701 slides towards the tool rest cross beam 6 in the tool rest shaft installing hole along with the rotating shafts of the two reamers 702, the driven connecting disc 10 is meshed with the driving connecting disc 13, the tool rest reset springs compress and accumulate force, when the driven connecting disc 10 is separated from the driving connecting disc 13, the reamer shell 701 resets under the action of the tool, the right side of the reamer shell 701 is integrally connected with an arc pressing block 16, and the reamer shell 701 can slide in the tool rest cross beam 6 by pushing the arc pressing block 16.

In the fifth embodiment, on the basis of the third embodiment, the cutting knife rest 8 includes a cutting knife housing 801, the cutting knife housing 801 is a square casing which is through from top to bottom, two cutting knives 802 are rotatably installed in the cutting knife housing 801, the two cutting knives 802 are provided with a plurality of cutting blades at equal intervals, the two cutting knives 802 are matched with each other, the plurality of cutting blades are installed in a staggered manner, one end of a rotating shaft of the two cutting knives 802 penetrates through the cutting knife housing 801 and is respectively rotatably and slidably installed in a knife rest shaft installation hole on a knife rest cross beam 6, the rotating shaft of the two cutting knives 802 can only rotate in the cutting knife housing 801, the rotating shaft of the two cutting knives 802 can rotate in the knife rest shaft installation hole and can drive the cutting knife housing 801 to slide in the knife rest shaft installation hole, a driven connecting disc 10 is installed on the rotating shaft of one of the cutting knives 802, the left sides of the two cutters 802 are respectively and coaxially provided with a cutter driving gear 804 and a cutter driven gear 805, the driven connecting disc 10 drives one of the cutter rotating shafts to rotate clockwise, the cutter driving gear 804 also rotates clockwise, the cutter driven gear 805 meshed with the cutter driving gear 804 drives the other cutter 802 to rotate anticlockwise, the rotating directions of the two cutters 802 are opposite, so that bones are cut towards the middle to achieve the effect of cutting bones, the rotating shafts of the two cutters 802 are sleeved with a cutter rest return spring 15 positioned between a cutter shell 801 and a cutter rest cross beam 6, when the cutter shell 801 slides towards the cutter rest cross beam 6 in a cutter rest shaft mounting hole along with the rotating shafts of the two cutters 802, the driven connecting disc 10 is meshed with the driving connecting disc 13, the cutter rest return spring compresses the stored force, when the driven connecting disc 10 is separated from the driving connecting disc 13, the cutter shell 801 is reset under the action of the cutter rest return spring, the right side of the cutter shell 801 is integrally connected with an arc pressing block 16, and the arc pressing block 16 is pushed, so that the cutter shell 801 can slide in the cutter rest cross beam 6.

Sixth embodiment, on the basis of the third embodiment, the sharpening holder 9 includes a sharpening housing 901, the sharpening housing 901 is a square casing which is through from top to bottom, two grinding rollers 902 are rotatably mounted in the sharpening housing 901, a gap is left between the two grinding rollers 902, the two grinding rollers 902 can rotate in the sharpening housing 901, one ends of rotating shafts of the two grinding rollers 902 penetrate through the sharpening housing 901 and are respectively rotatably and slidably mounted in a holder shaft mounting hole on a holder beam 6, the rotating shafts of the two grinding rollers 902 can only rotate in the sharpening housing 901, the rotating shafts of the two grinding rollers 902 can both rotate in the holder shaft mounting hole and can drive the sharpening housing 901 to slide in the holder shaft mounting hole, one of the sharpening rotating shafts is mounted with a driven connection disc 10, a sharpening driving pulley 904 and a sharpening driven pulley 905 are respectively and coaxially mounted on the left sides of the two grinding rollers 902, the transmission belt 906 is installed on the sharpening driving pulley 904 and the sharpening driven pulley 905, when the driven connecting disc 10 drives the rotating shaft of one of the grinding rollers 902 to rotate clockwise, the sharpening driving pulley 904 also rotates clockwise, the sharpening driven pulley 905 connected with the sharpening driving pulley 904 through the transmission belt 906 drives the other grinding roller 902 to rotate clockwise, the rotating directions of the two grinding rollers 902 are the same, so that bones can rotate on the two grinding rollers 902 to achieve the effect of grinding burs, when the bone fragments are ground to proper sizes, the bone fragments can fall into a container from a gap between the two grinding rollers 902, the two sharpening rotating shafts are both sleeved with a knife rest return spring 15 between the sharpening shell 901 and the knife rest cross beam 6, when the sharpening shell 901 slides towards the knife rest cross beam 6 in the knife rest shaft installing hole along with the rotating shafts of the two grinding rollers 902, the driven connecting disc 10 is connected with the driving connecting disc 13 in an occlusion mode, the tool rest return spring compresses to store force, when the driven connecting disc 10 is separated from the driving connecting disc 13, the sharpening shell 901 is reset under the action of the tool rest return spring 15, the arc pressing block 16 is integrally connected to the right side of the sharpening shell 901 to push the arc pressing block 16, and the sharpening shell 901 can slide in the tool rest cross beam 6.

Seventh embodiment, on the basis of the first embodiment, two positioning rods 24 are installed at the top in the main body 1, the positioning rods 24 can be welded in the main body 1 and can also be connected by bolts, the positioning block 23 is in a boss shape and is slidably installed on the two positioning rods 24, the positioning block 23 is in a T-shaped boss shape, the protruding part slides in the positioning groove 22, through holes are respectively formed at two sides of the positioning block 23, the two positioning rods 24 are placed in the through holes, so that the positioning block 23 can slide up and down in the positioning groove 22 along the positioning rods 24, a return spring 25 located between the positioning block 23 and the main body 1 is installed on the two positioning rods 24, when the positioning block 23 is pushed up by the cam 20 to abut against the L-shaped knife rest 5, the return spring 25 compresses the stored force, and when the cam 20 is reset, the positioning block 23 also resets simultaneously under the action.

In the eighth embodiment, on the basis of the first embodiment, the motor base 11 is provided with a motor mounting groove 26, the bottom of the motor mounting groove 26 is provided with a sliding groove, a motor mounting plate 27 is slidably mounted in the motor mounting groove 26, the bottom of the motor mounting plate 27 is integrally connected with a sliding block, the sliding block is mounted in the sliding groove, so that the motor mounting plate 27 can slide in the motor mounting groove 26, the motor 12 is mounted on the motor mounting plate 27, and can be fixed by bolts or by other common connection methods, a motor return spring 28 is mounted between the motor mounting plate 27 and the motor mounting groove 26, when the motor mounting plate 27 slides inwards, the motor return spring 28 compresses to store power, when a tool rest is switched, the motor stops rotating, the driven connecting disc 10 rotates for a period of time due to inertia effect, and at this time, the driving connecting disc 13 contacts, the motor 12 is moved rearwardly and the motor mounting plate 27 is slid rearwardly to compress the motor return spring 28, and when the tool holder is moved out of engagement with the motor 12, the motor 12 is returned by the motor return spring 28.

Ninth embodiment, on the basis of first embodiment, install circular-arc fixed pressing block 201 on the 2 inner walls of knife rest shell, when fixed pressing block 201 and circular arc briquetting 16 contact cooperation, can make reamer 7, cutter saddle 8, the knife rest 9 slide in knife rest crossbeam 6 and realize being connected with motor 12, open at the top of knife rest shell 2 has feed inlet 202, it has receiver installing port 203 to open on the right-hand member face of knife rest shell 2, slide in the receiver installing port 203 and have placed receiver 204, bone through smashing can fall into in the receiver 204, rotatory handle 29 is installed at the top of bull stick 3, rotatory handle 3 of operating personnel accessible rotates bull stick 3.

During the operation, when the reamer rest 7 is in a state of being connected with the motor, the reamer rest 8 needs to be switched to, firstly, the motor 12 is stopped, the driven connecting disc 10 is disconnected with the driving connecting disc 13, then the rotating handle 29 is rotated, the rotating rod 3 drives the reamer rest to rotate, when the arc pressing block 16 on the reamer rest 7 is gradually separated from the fixed pressing block 201, the reamer rest 7 is reset by the reamer rest reset spring 15, the motor 12 is opened, the rotating rod 3 is continuously rotated, the driving bevel gear 17 drives the driven bevel gear 18, the one-way wheel 19 and the cam 20 to rotate, the cam 20 drives the positioning block 23 to be upwards pushed when rotating, when the L-shaped reamer rest 5 where the reamer rest 8 is located reaches the fixed pressing block 201, the cam 20 just pushes the positioning block 23 to the lower end face of the L-shaped reamer rest 5, the positioning block 23 pushes against the L-shaped reamer rest 5, at the rotating rod 3 cannot rotate, and the fixed pressing block 201 pushes the arc pressing block 16 on the reamer rest, when the driving connecting disc 13 on the rotating shaft of the motor 12 rotates, the driving connecting disc gradually engages with the driven connecting disc 10 on the cutter frame 8, so that the cutter 802 rotates to work, and similarly, if the cutter frame 9 is switched, the operation can be performed.

Claims

1. A special composite bone crushing device for spinal surgery, comprising a main body (1) with a cavity inside and a knife holder housing (2) fixed above the main body (1), characterized in that the main body (1) is A rotating rod (3) is rotatably installed, one end of the rotating rod (3) extends into the tool holder housing (2), and three L-shaped tool holders (5) are fixedly installed. The three L-shaped tool holders (5) A reamer stand (7), a cutter stand (8), and a sharpening stand (9) are respectively rotated and slidably installed on the top of the reamer stand (7), the cutting stand (8), and the sharpening stand (9). A driven connecting plate (10) located on the inner side of the L-shaped tool rest (5) is fixedly installed on the rotating shaft of the rotary rod (3), and a motor base (11) located above the L-shaped tool rest (5) is sleeved on the rotating rod (3). , a motor (12) is fixedly installed on the motor base (11), an active connecting plate (13) is installed on the rotating shaft of the motor (12), and the rotating rod (3) is fixedly installed in the main body (1). The driving bevel gear (17), a driven bevel gear (18) meshing with the driving bevel gear (17) is rotatably mounted on the inner wall of the main body (1), and a one-way coaxially mounted on the right side of the driven bevel gear (18) A cam (20) is coaxially installed on the right side of the wheel (19) and the one-way wheel (19), a return torsion spring (21) is installed between the cam (20) and the main body (1), and the top of the main body (1) opens. There is a positioning groove (22) located above the cam (20) and passing through the bottom of the tool holder housing (2), and a positioning block (23) is slidably installed in the positioning groove (22).

2 . The composite bone crushing device for spinal surgery according to claim 1 , wherein the three L-shaped tool holders ( 5 ) comprise a tool holder cover fixedly installed on the rotating rod ( 3 ). 3 . Three L-shaped tool rests (5) are integrally connected to the outer contour surface of the cylinder (4) and the tool rest sleeve (4), and the tops of the three L-shaped tool rests (5) are integrally connected with tool rest beams ( 6).

3. The composite bone crushing device for spinal surgery according to claim 1, characterized in that, the contact surfaces of the driven connecting plate (10) and the active connecting plate (13) are integrally connected with a plurality of Protrusions, a plurality of the protrusions can connect the driven connecting plate (10) and the active connecting plate (13).

The composite bone crushing device for spinal surgery according to claim 3, characterized in that the reamer holder (7) comprises a reamer housing (701), and the reamer housing (701) Two reamers (702) are rotatably installed, and one end of the rotating shafts of the two reamers (702) pass through the reamer casing (701) and are respectively rotated and slidably installed in the tool rest beam (6). One of the reamer rotating shafts A driven connecting plate (10) is installed on the upper side, the left side of the two reamers (702) are respectively coaxially mounted with a reamer driving gear (704) and a reamer driven gear (705), and two reamer rotating shafts A tool rest return spring (15) located between the reamer housing (701) and the tool rest beam (6) is sleeved on the upper part, and an arc pressure block (16) is integrally connected to the right side of the reamer housing (701).

5 . The composite bone crushing device for spinal surgery according to claim 3 , wherein the cutter frame ( 8 ) comprises a cutter housing ( 801 ), and the cutter housing ( 801 ) Two cutting knives (802) are rotatably installed, and one end of the rotating shaft of the two cutting knives (802) passes through the cutting knife casing (801) and is respectively rotated and slidably installed in the beam (6) of the knife rest. One of the rotating shafts of the cutting knives A driven connecting plate (10) is installed on the upper, and the left sides of the two cutters (802) are respectively coaxially mounted with a cutter driving gear (804) and a cutter driven gear (805), and the two cutter rotating shafts A tool rest return spring (15) located between the cutter housing (801) and the tool rest beam (6) is sleeved on the upper part, and an arc pressure block (16) is integrally connected to the right side of the cutter housing (801).

6. The special composite bone crushing device for spinal surgery according to claim 3, wherein the sharpening frame (9) comprises a sharpening shell (901), wherein the sharpening shell (901) Two grinding rollers (902) are rotatably installed, and one end of the rotating shafts of the two grinding rollers (902) pass through the sharpening casing (901) and are respectively rotated and slidably installed in the tool rest beam (6), one of which is a sharpening shaft. A driven connecting plate (10) is installed on the top, and a sharpening driving pulley (904) and a sharpening driven pulley (905) are respectively installed on the left side of the two grinding rollers (902) coaxially. A transmission belt (906) is installed on the pulley (904) and the driven pulley (905) for sharpening, and a knife located between the sharpening shell (901) and the cross beam (6) of the knife rest is sleeved on the two sharpening shafts. The frame return spring (15) is integrally connected to the right side of the sharpening shell (901) with an arc pressure block (16).

The composite bone crushing device for spinal surgery according to claim 1, characterized in that, two positioning rods (24) are installed on the top of the main body (1), and the positioning block (23) It is in the shape of a boss and is slidably installed on the two positioning rods (24), and a return spring (25) between the positioning block (23) and the main body (1) is installed on the two positioning rods (24). .

8 . The composite bone crushing device for spinal surgery according to claim 1 , wherein the motor base ( 11 ) is provided with a motor installation groove ( 26 ), and the motor installation groove ( 26 ) is slidably installed in the motor installation groove ( 26 ). There is a motor installation plate (27), the motor (12) is installed on the motor installation plate (27), and a motor return spring (28) is installed between the motor installation plate (27) and the motor installation groove (26).

9 . The composite bone crushing device for spinal surgery according to claim 1 , wherein an arc-shaped fixed pressure block ( 201 ) is installed on the inner wall of the tool holder housing ( 2 ), and the tool holder housing A feeding port (202) is opened at the top of (2), a storage box installation port (203) is opened on the right end surface of the knife holder shell (2), and a storage box (204) is slidably placed in the storage box installation port (203). , a rotating handle (29) is installed on the top of the rotating rod (3).