CN203089276U - Axial force controllable surgical bone drill provided with step drill - Google Patents
Axial force controllable surgical bone drill provided with step drill Download PDFInfo
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- CN203089276U CN203089276U CN 201320020970 CN201320020970U CN203089276U CN 203089276 U CN203089276 U CN 203089276U CN 201320020970 CN201320020970 CN 201320020970 CN 201320020970 U CN201320020970 U CN 201320020970U CN 203089276 U CN203089276 U CN 203089276U
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Abstract
The utility model relates to an axial force controllable surgical bone drill provided with a step drill. The axial force controllable surgical bone drill provided with the step drill is high in control accuracy and capable of effectively avoiding injuries to brain tissues. The axial force controllable surgical bone drill provided with the step drill comprises a drill body and a drill bit. A direct current motor is arranged in a main case of the drill body and is connected with an intelligent integrated control system and a direct current power source. The output shaft of the direct current motor is connected with a gear transmission device. The gear transmission device is connected with a drill bit chuck through a transmission shaft. The drill bit is arranged on the drill bit chuck. A thrust bearing is arranged at the joint between the drill bit chuck and the transmission shaft and is tightly attached to a deforming element. The deforming element abuts against the main case and is positioned through an elastic element. A resistance strain gage is pasted on the inner surface of the deforming element and is connected with the intelligent integrated control system. A sealing device is arranged between the drill bit chuck and the main case. The first portion of the drill bit is a guiding portion, and the main body of the first portion of the drill bit is a twist drill. The second portion of the drill bit is a transition portion. The third portion of the drill bit is a broaching portion. Diamond abrasive particles are arranged on the spiral surface of the transition portion and the spiral surface of the broaching portion.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, and concrete is a kind of controlled surgery bone drill of axial force that adopts subland drill.Background technology
The apparatus of surgery skull boring at present is that hand electric bores, and the mode of operation that hand electric bores is: come the keyhole direction and the amount of feeding by the free-hand support electric drill of doctor.The electric drill design has one group of safety device, and power source is connected with drill bit by clutch, when drill bit bears pressure drill bit is linked to each other with power source by clutch, drives the drill bit running to carry out the bone drilling operation; When bit drills penetrator bone, because of can making drill bit, separates the counteracting force that no longer bears skull with power source, and electric drill is shut down.Yet these methods must rely on doctor's individual's abundant clinical experience and hand to feel to judge in the process of bone drilling whether passed through skull, and manually stop rapidly; If when carrying out via the doctor who lacks rich experiences, even the electric drill of above-mentioned specific safety device is arranged, the careless slightly meninges and the nervous tissue that also might when passing through skull, injure below the skull.Adopt free-hand mode to hole in addition, also may influence safety, accuracy and the comfortableness of boring procedure because the arm strength deficiency causes boring procedure to produce vibrations.
In order to increase surgery bone drilling process safe and accuracy, " a kind of intelligent bone drill and control method thereof " (China Patent No. is 2009101036423) utility model patent disclose the bone drill motor be provided with strain-type torque sensor, speed probe or pressure transducer any one, two or three senser element; On the bone drill motor, also be provided with the induced signal of embedded intelligence control module receiving sensor collection and judge control bone drill motor.But this method is speed probe, torque sensor and pressure transducer to be set drill speed, moment of torsion and pressure are measured in real time on the matrix of bone drill motor.The precision of obvious this measuring method and accuracy can not guarantee requirement, because be subjected to various signals and complexity thereof on the matrix of bone drill motor, the collection of signal and processing accuracy and accuracy are difficult to be guaranteed, add stress point from drill bit to power source motor, driving-chain is long, and the precision of test and accuracy can not meet the demands.
The utility model content
The purpose of this utility model provides a kind of controlled surgery bone drill of axial force that adopts subland drill exactly for addressing the above problem, and the degree of accuracy height of its control can effectively be avoided brain tissue injury.
For achieving the above object, this utility model adopts following technical scheme:
A kind of controlled surgery bone drill of axial force that adopts subland drill, it comprises drill body and drill bit, described drill body comprises casing, in casing, be provided with direct current generator, direct current generator is connected with dc source with intelligent integration control system, the output shaft of direct current generator is connected with gear drive, and gear drive is connected with drill bushing by power transmission shaft, and drill bit is installed on the drill bushing; Junction at drill bushing and power transmission shaft is provided with thrust bearing, thrust bearing is close to deformation element, deformation element abuts against on the casing, deformation element is located with flexible member, resistance strain gage sticks on the deformation element inner surface, resistance strain gage also is connected with intelligent integration control system, then is provided with sealing device between drill bushing and casing; Described drill bit adopts the step drill structure, and the working portion of drill bit is divided into three parts, and first is a targeting part, its main body is a fluted drill, second portion is a transition portion, and third part is the reaming part, on the helical surface of transition portion and reaming part diamond abrasive grain is installed.
The total length L of described drill bit
4, working portion length is l
4, the working portion l of drill bit
4Be divided into three sections; Drill bit is selected rustless steel for use, and drill tip is the drillstock part, adopts the staight shank shape.Manufacture process: be d at first with diameter
4The rustless steel cylinder process three parts of working portion, partly process thread groove, helixangle at transition portion and reaming then
4Scope is between 18 °-30 °; The targeting part l of working portion
04Be the standard fluted drill, outside diameter d
04Scope is at 1mm-5mm, drift angle 2 φ of drill bit
4Excursion between 90 °-120 °, helixangle
4Scope is between 18 °-30 °, and the anterior angle of drill bit obtains maximal rake angle γ in external diameter edge
4=30 °, the relief angle of drill bit is obtaining maximum α near the chisel edge place
4=20 °-26 °; The transition portion l of working portion
14With reaming part l
24Be used for carrying out braze welding diamond abrasive grain, wherein transition portion l
14Length can suitably adjust according to bit diameter size; Diamond abrasive grain is designed to two row, and the granularity of diamond abrasive grain difference is as required selected 20#-80# for use, the average diameter D of drill bit behind the soldering abrasive particle
4Scope is determined at 2mm-10mm; Line-spacing H between the abrasive particle
4With row apart from h
4Scope is between 2-3 times abrasive particle particle diameter.
Described intelligent integration control system comprises single-chip microcomputer, and single-chip microcomputer is connected with gauge tap with direct current generator by ON-OFF control circuit; Single-chip microcomputer also is connected with A/D converter, signal picker, amplifier, wave filter, bridge circuit successively simultaneously, and bridge circuit is connected with resistance strain gage; Signal picker is gathered the voltage signal of measuring, and converts digital quantity to through A/D converter then and is input in the single-chip microcomputer, and single-chip microcomputer is analyzed, judged digital quantity, sends control signal:
Judge whether to satisfy the automatic stop condition: drill bit is drilling the decline suddenly of bone moment axial force, and later axial force can remain unchanged very little and substantially, so judging the foundation drill is exactly that the slope of the voltage signal that collected is less than a very little value that configures and remain unchanged substantially, single-chip microcomputer was promptly judged and was satisfied the automatic stop condition this moment, promptly can send the signal cut ON-OFF control circuit, thereby realize the automatic stop function;
Simultaneously, the voltage signal that single-chip microcomputer is gathered according to signal pickup assembly judges whether axial force is excessive, judges that the excessive foundation of axial force is: the voltage signal of being gathered is greater than certain value that configures, and at this moment single-chip microcomputer judges that promptly axial force is excessive at this moment.
Described gear drive comprises a driving gear shaft that is connected by tongue and groove with the direct current generator output shaft, the driving gear shaft two ends are connected with the deep groove ball bearing II with the deep groove ball bearing I respectively and position, and two bearings are all realized the location by the shaft shoulder and casing; Driving gear shaft and driven gear engagement, driven gear is connected with driven shaft by flat key, driven gear is realized axial location by the shaft shoulder and axle sleeve I, the driven shaft two ends are symmetrically installed with deep groove ball bearing III and deep groove ball bearing IV, the deep groove ball bearing III is located with retainer nut's II, the shaft shoulder and casing, and the deep groove ball bearing IV is located with axle sleeve I, retainer nut's I and casing; Driven shaft links to each other by tongue and groove with power transmission shaft.
Described power transmission shaft is provided with the axle sleeve II, and the driven shaft two ends are installed in respectively on deep groove ball bearing V and the deep groove ball bearing VI.
Described sealing device is the sealing ring that is embedded on the casing.
This utility model provides a kind of controlled surgery bone drill and drill bit thereof of axial force that adopts subland drill, in the process of boring, the axial force transmission route is that bone acts on the drill bit, drill bit passes to drill bushing, and drill bushing passes to power transmission shaft, and power transmission shaft passes to thrust bearing, thrust bearing passes to deformation element, so just cause deformation element generation deformation, cause the deformation of resistance strain gage, the axial force size just is converted into the size of resistance strain gage deformation quantity like this.The deformation meeting of resistance strain gage changes its resistance value, be converted to small magnitude of voltage through behind the bridge circuit, carry out filtering through wave filter then, after discharging interfering signal, after amplifier amplification, signal picker acquired signal and A/D converter 36 conversions, can be discerned again, operating mode is judged by single-chip microcomputer.
When boring, may cause temperature to raise owing to the plastic deformation and the frictional force between drill bit and bone of bone fragments.May cause osteonecrosis in the bone drilling process, the osteocyte of boring adjacent domain can cause permanent death when surpassing 50 ℃ of marginal values owing to borehole temperature.In order to reduce borehole temperature, boring procedure has prevented that as far as possible soon heat from importing in the bone adjacent tissue.By increasing axial force penetration rate is improved.Yet axial force is excessive, may cause the raising of patient's further fracture and drilling temperature.Drilling parameter is adjusted axial force and borehole temperature obviously can not tackle the problem at its root by changing.This utility model adopts braze welding diamond on the bone drill matrix surface, and realizes the controlled ordered arrangement of diamond abrasive grain.The exposed height of abrasive particle can reach 70 ﹪-80 ﹪, and the cutting edge that therefore is equivalent to act on behalf of with diamond abrasive grain bone drill is finished drilling operation, therefore can reduce drill thrust greatly, thereby reduce the drilling temperature.
The beneficial effects of the utility model are: the fore bearing of bone drill power transmission shaft is that thrust bearing is provided with deformation element and resistance strain gage, thereby the drill thrust in the monitoring drilling process, because fore bearing is directly near bit force point, the monitoring and the transfer ratio of signal are more accurate, the precision height can effectively prevent when the excessive or bone drill of axial force from wearing the injury to osseous tissue; The targeting part of drill bit is thin fluted drill part, and the anterior angle of drill bit obtains maximal rake angle γ in external diameter edge
4=30 °, make cutting edge sharper, reduced axial force, the relief angle of drill bit is obtaining maximum α near the chisel edge place
4=20 °-26 °, effectively reduced the friction of knife face and machined surface behind the drill bit, reduce the generation of frictional heat, thereby reduced the temperature rise of boring procedure; The drill bit transition portion is a conical transition stage, can reduce the injury of drill bit to the bone surrounding tissue; Reamer is divided into the thread groove stage of fixed diameter, is mainly the reaming function, can process thicker osseous tissue and the bigger boring of processing, and the form of this step drill can effectively reduce the temperature rise of boring procedure; Braze welding diamond on transition portion and the reaming part matrix surface, and the controlled ordered arrangement of realization diamond abrasive grain, soldering two row diamond abrasive grains, and with the line-spacing of abrasive particle and row apart from being controlled between 2-3 times of abrasive particle particle diameters, cutter life and boring surface quality have so not only been prolonged, and improved working (machining) efficiency, shorten drilling time, thereby reduced the temperature rise of boring procedure; The exposed height of diamond abrasive grain can reach 70 ﹪-80 ﹪, and with the line-spacing of abrasive particle and row apart from being controlled between 2-3 times of abrasive particle particle diameters, guarantee that drill bit has enough chip spaces, prevent that drill bit from stopping up and timely scrap fallaway, take away the heat of generation, reduce temperature rise; The helical angle of helical flue of drill is controlled between 18 °-30 °, can guarantee that smear metal can in time discharge smoothly, takes away heat, reduces temperature rise; This cutting edge with diamond abrasive grain replacement bone drill is finished drilling operation, can reduce drill thrust greatly, thereby reduce the drilling temperature.
Description of drawings
Fig. 1 is the cutaway view of surgery bone drilling automatic stop cooling electric drill;
Fig. 2 is the intelligent integration control system parts;
Fig. 3 is the axial force transmission block diagram;
Fig. 4 detects the control block diagram for axial force;
Fig. 5 is for drilling automatic stop function control block diagram;
Fig. 6 is the excessive control block diagram of axial force;
Fig. 7 is the bone drilling drill bit;
Fig. 7 a is the apex point structure chart;
Fig. 7 b is the apex point construction profile;
Fig. 7 c is Fig. 7 partial enlarged drawing I;
Fig. 7 d is that the D-D of Fig. 7 is to view;
Fig. 7 e is the partial enlarged drawing II of Fig. 7 d.
Wherein, 1-dc source, 2-gauge tap, 3-driving gear shaft, the 4-casing, 5-direct current generator, 6-driven shaft, 7-intelligent integration control system, the 8-flat key, 9-driven gear, 10-axle sleeve I, 11-axle sleeve II, 12-retainer nut's I, 13-power transmission shaft, 14-resistance strain gage, the 15-flexible member, 16-deformation element, 17-thrust bearing, the 18-sealing ring, 19-drill bushing, 20-drill bit, 21-deep groove ball bearing I, 22-deep groove ball bearing II, 23-deep groove ball bearing III, 24-deep groove ball bearing IV, 25-deep groove ball bearing V, 26-deep groove ball bearing VI, 27-retainer nut's II, 28-retainer nut's III, 29-direct current generator base, 30-dc source bottom, 31-screwed hole, 32-bridge circuit, the 33-wave filter, 34-amplifier, 35-signal picker, the 36-A/D transducer, 37-single-chip microcomputer, 38-ON-OFF control circuit.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment this utility model is described further.
Fig. 1 has shown each ingredient of surgery bone drilling automatic stop cooling electric drill, and wherein casing 4 is made of symmetric two halves up and down, and is fixed by screwed hole 31 by screw.Dc source 1 links to each other with gauge tap 2 usefulness leads, and in conjunction with Fig. 2 as can be known, gauge tap 2 links to each other with ON-OFF control circuit 38 usefulness leads in the intelligent integration control system 7, and ON-OFF control circuit 38 is connected with direct current generator 5 usefulness leads.Direct current generator 5 is fixed on the direct current generator base 29.Direct current generator 5 and driving gear shaft 3 link to each other by tongue and groove, driving gear shaft 3 is installed in and realizes the location on deep groove ball bearing I 21 and the deep groove ball bearing II 22, and two bearings are all realized the location by the shaft shoulder and casing 4, driving gear shaft 3 and driven gear 9 are meshed, and driven gear 9 matches by flat key 8 and driven shaft 6.Driven gear 9 is realized axial location by the shaft shoulder and axle sleeve I 10, driven shaft 6 two ends are symmetrically installed with deep groove ball bearing III 23 and deep groove ball bearing IV 24, deep groove ball bearing III 23 usefulness retainer nut II 27, the shaft shoulder and casing 4 are located, deep groove ball bearing IV 24 usefulness axle sleeve I 10, retainer nut's I and casing 4 location.Driven shaft 6 links to each other with power transmission shaft 13 tongue and grooves, deep groove ball bearing V 25 is installed at power transmission shaft 6 two ends and deep groove ball bearing VI 26 realizes the location, deep groove ball bearing V 25 relies on retainer nut's III 28, axle sleeve II 11 and casing 4 location, the deep groove ball bearing VI 26 usefulness shaft shoulders, axle sleeve II 11 and casing 4 location.The shaft shoulder place of the other end of power transmission shaft 13 is equipped with a thrust bearing 17, thrust bearing 17 is close to deformation element 16, deformation element 16 other ends abut against on the casing 4, deformation element 16 usefulness flexible members 15 location, and resistance strain gage 14 sticks on deformation element 16 inner surfacies.Can get in conjunction with Fig. 2, resistance strain gage 14 links to each other with lead with bridge circuit in the intelligent integration control system 7.Drill bushing 19 is fixed on the power transmission shaft end, and drill bushing 19 is used for clamping drill bit 20.Sealing ring 18 is embedded in the casing and seals, and dc source bottom 30 is held on the casing 4.
As shown in Figure 2, intelligent integration control system 7 is by bridge circuit 32, wave filter 33, and amplifier 34, signal picker 35, A/D converter 36, single-chip microcomputer 37, ON-OFF control circuit 38 set form.Wherein, resistance strain gage 14 links to each other with bridge circuit 32 usefulness leads, bridge circuit 32 and wave filter 33 are communicated with, wave filter 33 links to each other with amplifier 34, amplifier 34 links to each other with signal picker 35, and signal picker 35 links to each other with A/D converter 36, and A/D converter 36 links to each other with single-chip microcomputer 37, single-chip microcomputer 37 with link to each other with ON-OFF control circuit 38, ON-OFF control circuit 38 links to each other with gauge tap 2 usefulness leads with direct current generator 5 respectively.
Can get by Fig. 3, in the process of boring, the axial force transmission route is that bone acts on the drill bit 20, drill bit 20 passes to drill bushing 19, and drill bushing 19 passes to power transmission shaft 13, and power transmission shaft passes 13 and passes to thrust bearing 17, thrust bearing 17 passes to deformation element 16, so just cause that deformation takes place deformation element 16, cause the deformation of resistance strain gage 14, the axial force size just is converted into the size of resistance strain gage 14 deformation quantities like this.
The deformation meeting that can be got resistance strain gage 14 by Fig. 4 changes its resistance value, be converted to small magnitude of voltage through behind the bridge circuit 32, carry out filtering through wave filter 33 then, after discharging interfering signal, after amplifier 34 amplifications, signal picker 35 acquired signal and A/D converter 36 conversions, can be discerned again, operating mode is judged by single-chip microcomputer 37.
As shown in Figure 5, in the electric drill work, signal picker is gathered the voltage signal of measuring, converting digital quantity to through A/D converter 36 then is input to and judges whether to satisfy the automatic stop condition in the single-chip microcomputer 37, if satisfy the automatic stop condition, single-chip microcomputer 37 can send to instruct ON-OFF control circuit 38 is opened circuit so, realizes the automatic stop function.Because drill bit is drilling the decline suddenly of bone moment axial force, and later axial force can remain unchanged very little and substantially, so judging the foundation drill is exactly that the slope of the voltage signal that collected is less than a very little value that configures and remain unchanged substantially, single-chip microcomputer 37 was promptly judged and was satisfied the automatic stop condition this moment, promptly can send signal cut ON-OFF control circuit 38, thereby realize the automatic stop function.
As shown in Figure 6, the voltage signal that collects is received by single-chip microcomputer 37 after A/D converter 36 conversions, and axial force is excessive if single-chip microcomputer 37 is judged this moment, and single-chip microcomputer will send instruction to ON-OFF control circuit 38, reduce electric current, thereby axial force was controlled in normal range.Judge the excessive foundation of axial force be the voltage signal gathered greater than certain value that configures, at this moment single-chip microcomputer 37 judges that promptly axial force is excessive at this moment.
Shown in Fig. 7, Fig. 7 a-7e, drill-shape is similar to step drill, the total length L of drill bit
4, working portion length is l
4, the working portion l of drill bit
4Can be divided into three parts.Drill bit material is selected rustless steel for use, and drill tip is the drillstock part, adopts the staight shank shape.Its processing method: be d at first with diameter
4The rustless steel cylinder process three parts of working portion, partly process thread groove, helixangle at transition portion and reaming then
4Scope is between 18 °-30 °.Targeting part l with working portion
04Be processed as the standard fluted drill, its form parameter is identical with standard fluted drill parameter, outside diameter d
04Scope is at 1mm-5mm, drift angle 2 φ of drill bit
4Excursion between 90 °-120 °, helixangle
4Scope is between 18 °-30 °, and the anterior angle of drill bit obtains maximal rake angle γ in external diameter edge
4=30 ° of (N
4-N
4Section), the relief angle of drill bit is obtaining maximum α near the chisel edge place
4=20 ° of-26 ° of (O
4-O
4Section), this thin fluted drill part can reduce axial force, thereby reduces the temperature rise of boring procedure.The transition portion l of working portion
14With reaming part l
24Thread groove be used for carrying out braze welding diamond abrasive grain, wherein transition portion l
14Can reduce the injury of drill bit to surrounding tissue, length can suitably be adjusted according to the bit diameter size.Then to the transition portion l of working portion
14With reaming part l
24Carry out the controlled braze welding diamond abrasive grain of arranging, this controlled arranging not only prolonged cutter life and boring surface quality, and improved working (machining) efficiency, shortened drilling time, thereby reduced the temperature rise of boring procedure.Diamond abrasive grain is designed to two row, and exposed 70 ﹪-80 ﹪ that highly accounts for whole abrasive particle height of single abrasive particle controls line-spacing H between the abrasive particle artificially with controlled method of arranging manufacturing
4With row apart from h
4Scope is between 2-3 times abrasive particle particle diameter, and these guarantee that all drill bit has enough chip spaces, prevents that drill bit from stopping up and the timely scrap fallaway of energy, takes away the heat of generation, reduces temperature rise.According to the matrix diameter d that is adopted
4Exposed height h with single abrasive particle
T4, can be behind the soldering abrasive particle with the average diameter D of drill bit
4Scope is determined at 2mm-10mm.The granularity of diamond abrasive grain difference as required can be selected 20#-80# for use.
Work process of the present utility model is as follows:
In conjunction with Fig. 1 as can be known, at first drill bit 20 is installed on the drill bushing 19, closed then gauge tap 2, intelligent integration control system 7 judges that meeting path condition realizes that promptly dc source 1 passes through ON-OFF control circuit 38 and gives direct current generator 5 power supplies, direct current generator produces power, the power that motor produces passes to driving gear shaft 3 by electric machine main shaft, driving gear 3 is given driven gear 9 by gear meshing with power transmission, interconnect function by flat key 8, driven gear 9 is given driven shaft 6 with transmission of power, driven shaft 6 is given power transmission shaft 13 with transmission of power again, power transmission shaft 13 is given drill bushing 19 with transmission of power, drill bushing 19 transmission of power is the most at last given drill bit 20, has so just realized the boring motion.Can get in conjunction with Fig. 3, the reaction force acts of bone is on drill bit 20 in the process of boring, drill bit 20 passes to drill bushing 19, drill bushing 19 passes to power transmission shaft 13, power transmission shaft passes 13 and passes to thrust bearing 17, and thrust bearing 17 passes to deformation element 16, so just causes that deformation takes place deformation element 16, cause the deformation of resistance strain gage 14, the axial force size just is converted into the size of resistance strain gage 14 deformation quantities like this.The deformation meeting that can get resistance strain gage 14 in conjunction with Fig. 4 changes its resistance value, be converted to small magnitude of voltage through behind the bridge circuit 32, carry out filtering through wave filter 33 then, after discharging interfering signal, after amplifier 34 amplifications, signal picker 35 acquired signal and A/D converter 36 conversions, can be discerned again, and operating mode is judged by single-chip microcomputer 37.Intelligence control system 7 can realize the axial force monitoring and drill two kinds of functions of automatic stop in the boring procedure.As shown in Figure 5, in the electric drill work, 35 pairs of voltage signals of signal picker are gathered, converting digital quantity to through A/D converter 36 then is input in the single-chip microcomputer 37, judge whether to satisfy the automatic stop condition, if satisfy the automatic stop condition, single-chip microcomputer 37 can send to instruct ON-OFF control circuit 38 is opened circuit so, realizes the automatic stop function.In conjunction with Fig. 6 as can be known, the voltage signal that collects is received by single-chip microcomputer 37 after A/D converter 36 conversions, and axial force is excessive if single-chip microcomputer 37 is judged this moment, will send instruction to ON-OFF control circuit 38, reduce electric current, thereby axial force was controlled in normal range.Boring is unloaded drill bit 20 after finishing, and equipment is carried out disinfection and keeps properly.
Claims (6)
1. controlled surgery bone drill of axial force that adopts subland drill, it comprises drill body and drill bit, it is characterized in that, described drill body comprises casing, be provided with direct current generator in casing, direct current generator is connected with dc source with intelligent integration control system, and the output shaft of direct current generator is connected with gear drive, gear drive is connected with drill bushing by power transmission shaft, and drill bit is installed on the drill bushing; Junction at drill bushing and power transmission shaft is provided with thrust bearing, thrust bearing is close to deformation element, deformation element abuts against on the casing, deformation element is located with flexible member, resistance strain gage sticks on the deformation element inner surface, resistance strain gage also is connected with intelligent integration control system, then is provided with sealing device between drill bushing and casing; Described drill bit adopts the step drill structure, and the working portion of drill bit is divided into three parts, and first is a targeting part, its main body is a fluted drill, second portion is a transition portion, and third part is the reaming part, on the helical surface of transition portion and reaming part diamond abrasive grain is installed.
2. the surgery bone drill that the axial force of employing subland drill as claimed in claim 1 is controlled is characterized in that, the total length L of described drill bit
4, working portion length is l
4, the working portion l of drill bit
4Be divided into three parts; Drill bit is selected rustless steel for use, and drillstock partly adopts the staight shank shape, is d by diameter
4The rustless steel cylinder process; At transition portion and reaming thread groove is arranged partly, its helixangle
4Scope is between 18 °-30 °; Targeting part l
04Be the standard fluted drill, outside diameter d
04Scope is at 1mm-5mm, the drift angle of drill bit
Excursion between 90 °-120 °, helixangle
4Scope is between 18 °-30 °; The anterior angle of drill bit obtains maximal rake angle γ in external diameter edge
4=30 °, the relief angle of drill bit is obtaining maximum α near the chisel edge place
4=20 °-26 °; Transition portion l
14With reaming part l
24The helical surface braze welding diamond abrasive grain, transition portion l wherein
14Length is suitably adjusted according to the bit diameter size; Diamond abrasive grain is designed to two row, and the granularity of diamond abrasive grain difference is as required selected 20#-80# for use, the average diameter D of drill bit behind the soldering abrasive particle
4Scope is determined at 2mm-10mm; Line-spacing H between the abrasive particle
4With row apart from h
4Scope is between 2-3 times abrasive particle particle diameter.
3. the surgery bone drill that the axial force of employing subland drill as claimed in claim 1 is controlled is characterized in that described intelligent integration control system comprises single-chip microcomputer, and single-chip microcomputer is connected with gauge tap with direct current generator by ON-OFF control circuit; Single-chip microcomputer also is connected with A/D converter, signal picker, amplifier, wave filter, bridge circuit successively simultaneously, and bridge circuit is connected with resistance strain gage; Signal picker is gathered the voltage signal of measuring, and converts digital quantity to through A/D converter then and is input in the single-chip microcomputer, and single-chip microcomputer is analyzed, judged digital quantity, sends control signal.
4. the surgery bone drill that the axial force of employing subland drill as claimed in claim 1 is controlled, it is characterized in that, described gear drive comprises a driving gear shaft that is connected by tongue and groove with the direct current generator output shaft, the driving gear shaft two ends are connected with the deep groove ball bearing II with the deep groove ball bearing I respectively and position, and two bearings are all realized the location by the shaft shoulder and casing; Driving gear shaft and driven gear engagement, driven gear is connected with driven shaft by flat key, driven gear is realized axial location by the shaft shoulder and axle sleeve I, the driven shaft two ends are symmetrically installed with deep groove ball bearing III and deep groove ball bearing IV, the deep groove ball bearing III is located with retainer nut's II, the shaft shoulder and casing, and the deep groove ball bearing IV is located with axle sleeve I, retainer nut's I and casing; Driven shaft links to each other by tongue and groove with power transmission shaft.
5. the surgery bone drill that the axial force of employing subland drill as claimed in claim 1 is controlled is characterized in that described power transmission shaft is provided with the axle sleeve II, and the driven shaft two ends are installed in respectively on deep groove ball bearing V and the deep groove ball bearing VI.
6. the surgery bone drill that the axial force of employing subland drill as claimed in claim 1 is controlled is characterized in that, described sealing device is the sealing ring that is embedded on the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020970 CN203089276U (en) | 2013-01-12 | 2013-01-12 | Axial force controllable surgical bone drill provided with step drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020970 CN203089276U (en) | 2013-01-12 | 2013-01-12 | Axial force controllable surgical bone drill provided with step drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203089276U true CN203089276U (en) | 2013-07-31 |
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ID=48840729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320020970 Expired - Fee Related CN203089276U (en) | 2013-01-12 | 2013-01-12 | Axial force controllable surgical bone drill provided with step drill |
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| Country | Link |
|---|---|
| CN (1) | CN203089276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006290A (en) * | 2013-01-12 | 2013-04-03 | 青岛理工大学 | Axial force controllable surgical bone drill with stepped bit |
| CN103976772A (en) * | 2014-05-27 | 2014-08-13 | 梁红所 | Bone drill capable of stopping rotating automatically |
-
2013
- 2013-01-12 CN CN 201320020970 patent/CN203089276U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006290A (en) * | 2013-01-12 | 2013-04-03 | 青岛理工大学 | Axial force controllable surgical bone drill with stepped bit |
| CN103976772A (en) * | 2014-05-27 | 2014-08-13 | 梁红所 | Bone drill capable of stopping rotating automatically |
| CN103976772B (en) * | 2014-05-27 | 2016-03-23 | 梁红所 | Automatic stall formula bone drill |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20140112 |