CN114259275B - Drill bit device capable of stopping suddenly after drilling skull - Google Patents
Drill bit device capable of stopping suddenly after drilling skull Download PDFInfo
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- CN114259275B CN114259275B CN202111424862.3A CN202111424862A CN114259275B CN 114259275 B CN114259275 B CN 114259275B CN 202111424862 A CN202111424862 A CN 202111424862A CN 114259275 B CN114259275 B CN 114259275B
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- steel ball
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- 210000003625 skull Anatomy 0.000 title claims abstract description 74
- 238000005553 drilling Methods 0.000 title claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 94
- 238000005859 coupling reaction Methods 0.000 claims abstract description 94
- 230000008878 coupling Effects 0.000 claims abstract description 92
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 28
- 238000007906 compression Methods 0.000 claims abstract description 28
- 230000009471 action Effects 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 238000002591 computed tomography Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000002418 meninge Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention relates to the technical field of drill bit devices for neurosurgery, in particular to a drill bit device capable of stopping suddenly after a skull is penetrated by drilling, which comprises an output shaft, a coupling head assembly, a coupling sleeve assembly and a drill bit assembly; one end of the connecting head component is assembled with the end part of the output shaft of the electric drill in a plugging manner, the other end of the connecting head component is assembled with the connecting sleeve component in a plugging manner, and the other end of the connecting sleeve component is assembled with the drill bit component in a sleeving manner; the coupling sleeve assembly includes: the device comprises a connecting sleeve, an inverted conical hole, a first steel ball, a perforation, a first compression spring, an inner sleeve and an ejector rod; the circumference wall of the connecting sleeve is provided with an inverted conical hole in the circumferential direction, a first steel ball is assembled in the inverted conical hole, and the right end side wall of the connecting sleeve is axially provided with a perforation. When the drill bit drills through the skull, the axial direction and acting force of the skull on the drill bit disappear or are smaller than a certain value, the device does not transmit moment to the drill bit any more under the action of the internal mechanism, and the cutting moment of the drill bit is automatically cut off, so that the drill bit stops automatically after penetrating through the skull without damaging other purposes.
Description
Technical Field
The invention relates to the technical field of drill bit devices for neurosurgery, in particular to a drill bit device capable of stopping suddenly after a skull is penetrated by drilling.
Background
In the neurosurgical field, drilling of the skull is a common preoperative need. The operation requirements are as follows: 1. drilling a hole in the skull, and draining or operating at the hole; 2. 3 to 4 holes are drilled on the skull, then the skull is cut and removed by a wire saw or cutting method, and the operation is performed in the window area. Drilling holes in the skull is therefore a demanding and risky task (as little as possible to injure the meninges) and is a technical and physical challenge for neurosurgeons.
Aiming at the prior drilling on the skull, the outer layer of the drill bit is mainly provided with a protective sleeve, the protective sleeve is continuously adjusted when in drilling, and the drilling on the skull is completed by a progressive method. The operator is stressed and is easy to hurt when losing the spirit in the drilling process. The invention provides a drill bit device capable of stopping suddenly after a skull is penetrated by drilling, which solves the problem of drilling holes on the skull.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a drill bit device capable of stopping suddenly after the drill bit drills through the skull, when the axial direction and acting force of the skull on the drill bit are disappeared or smaller than a certain value after the drill bit drills through the skull, the device does not transmit moment to the drill bit any more under the action of an internal mechanism, and the cutting moment of the drill bit is automatically cut off, so that the drill bit stops automatically after the drill bit drills through the skull without damaging other purposes.
The invention is realized by the following technical scheme:
a drill bit device capable of stopping suddenly after drilling through skull comprises an output shaft, a coupling head assembly, a coupling sleeve assembly and a drill bit assembly;
one end of the coupling head assembly is assembled with the end part of the output shaft of the electric drill in a plugging manner, the other end of the coupling head assembly is assembled with the coupling sleeve assembly in a plugging manner, and the other end of the coupling sleeve assembly is assembled with the drill bit assembly in a sleeving manner;
the coupling sleeve assembly includes: the device comprises a connecting sleeve, an inverted conical hole, a first steel ball, a perforation, a first compression spring, an inner sleeve and an ejector rod; the circumference wall of the connecting sleeve is provided with the back taper hole in the circumferential direction, the first steel ball is assembled in the back taper hole, the through hole is axially formed in the side wall of the right end of the connecting sleeve, the inner sleeve is inserted in the connecting sleeve in a sliding manner, the ejector rod is inserted in the opening of the right end of the inner sleeve in a sliding manner, the ejector rod is connected with the inner sleeve through the first compression spring, and meanwhile, the right end of the ejector rod penetrates through the through hole;
the drill bit assembly includes: a drill bit protective sleeve and a drill bit; the drill bit protection sleeve is arranged on the outer circumferential wall of the connecting sleeve in a sliding and locking mode, and meanwhile the drill bit is arranged at the opening of the right end of the drill bit protection sleeve in a gap mode.
Preferably, the coupling sleeve comprises: the frustum connecting part and the connecting inner sleeve; the frustum connecting part and the connecting inner sleeve are integrally formed.
Preferably, a first circular arc groove and a second circular arc groove are respectively formed on the left side of the outer circumferential wall of the inner sleeve and the inner circumferential wall of the drill bit protective sleeve, and are respectively matched with the protruding surface of the first steel ball.
Preferably, the coupling head assembly comprises: the device comprises a coupling head, a clamping hole, a second steel ball, a second compression spring, a coupling head jacket and a clamping piece; the outer sliding sleeve of the coupling head is provided with the coupling head outer sleeve, the inner wall of the left end of the coupling head outer sleeve is embedded with the clamping piece, the clamping piece is connected with the right end shoulder of the coupling head through the second compression spring, the left circumferential wall of the coupling head is provided with the clamping hole, the second steel ball is assembled in the clamping hole, and meanwhile the clamping piece is matched with the protruding surface of the second steel ball.
Preferably, the inside of the coupling head further comprises an axially opened key slot, a key shaft piece is assembled in a sliding insertion manner in the key slot, and a third circular arc slot is formed in the circumferential shaft wall of the key shaft piece and matched with the protruding surface of the second steel ball.
Preferably, the method further comprises the following steps:
when the right end head of the drill bit is propped against the skull, under the axial reaction of the skull, the drill bit overcomes the pressure of the first compression spring to axially displace, the end face teeth at the tail part of the left end of the drill bit are meshed with the end face teeth at the right end of the connecting inner sleeve, the rotation moment on the output shaft of the electric drill is transmitted to the drill bit, and the drill bit drills the skull;
when the axial reaction force of the skull is disappeared or is smaller than a certain value, the end face tooth at the tail part of the left end of the drill bit and the end face tooth at the right end of the connecting inner sleeve are in a separation state under the action of the ejector rod and the first compression spring, the separation gap is 0.2mm, the rotation moment on the output shaft cannot be transmitted to the drill bit, and the drill bit cannot drill the skull.
Preferably, the method further comprises the following steps:
the connecting inner sleeve is provided with three inverted conical holes on the circumference of the outer ring, the aperture of each inverted conical hole is arranged in an inner large and outer small way, in an assembled state, the protruding surface of the first steel ball is just matched with the second circular arc groove on the drill bit protecting sleeve, so that the axial positioning is realized, and meanwhile, the drill bit and the drill bit protecting sleeve do not rotate together with the connecting inner sleeve;
when the key shaft piece is inserted into the key groove on the connecting head and falls relatively, at the moment, the right end face of the key shaft piece pushes the inner sleeve open and moves rightwards for a certain distance, so that the first circular arc groove on the inner sleeve just falls onto the protruding circular arc surface of the first steel ball, and at the moment, the first steel ball moves inwards in the radial direction, and the purpose of separating the drill bit from the drill bit protecting sleeve is achieved.
Preferably, the method further comprises the following steps:
the drill bit protective sleeve has a double protection function; on the one hand, the function of positioning and protecting the drill bit and on the other hand, the function of avoiding the axial excessive impact of the drill bit;
the distance between the right end head of the drill bit and the right end head of the drill bit protective sleeve is determined according to the thickness of the skull; ensuring that the distance between the two is 1.5mm thicker than the thickness of the skull, stopping rotating the drill bit after the drill bit drills through the skull, wherein the whole drill bit device is also axially pushed, and the right end head end of the drill bit protective sleeve is clamped on the outer surface of the skull to offset the axial pushing force so as to realize the function of double protection; meanwhile, the drill bit protective sleeve is of various specifications, and the difference of the various specifications is that the setting lengths of the end parts of the right end head are different.
Preferably, the method further comprises the steps of installing the drill bit and the drill bit protective sleeve,
namely: when the key shaft piece is inserted into the key groove of the connecting head and is relatively located, the right end face of the key shaft piece pushes the inner sleeve to move rightwards for a certain distance, the first circular arc groove on the outer surface of the inner sleeve just corresponds to the protruding circular arc surface of the first steel ball, the first steel ball moves inwards in the radial direction, and the drill bit protecting sleeve are separated from the drill bit device;
on the contrary, only after the key shaft piece is inserted into the key groove of the coupling head and is relatively located, the drill bit and the drill bit protecting sleeve can be installed in place, then the coupling head outer sleeve is pushed towards the drill bit, the key shaft piece is pulled out, and the coupling head outer sleeve is released, so that the drill bit is replaced.
Preferably, the method further comprises the following steps:
before the key shaft piece is inserted into the key groove of the coupling head, the coupling head outer sleeve is pushed to move rightwards, so that the second compression spring is compressed, at the moment, the elastic bulge of the clamping piece is separated from the second steel ball, and when the subsequent key shaft piece is inserted into the key groove of the coupling head, the second circular arc groove on the key shaft piece just corresponds to the protruding circular arc surface of the second steel ball.
The beneficial effects of the invention are as follows:
1. only when the head of the drill head is propped against the skull, under the axial reaction of the skull, the drill head overcomes the pressure of the first compression spring to generate axial micro displacement (about 1 mm), at the moment, the rear end face teeth of the drill head are meshed with the front end face teeth of the connecting inner sleeve, at the moment, the rotation moment of the electric drill is transmitted to the drill head, and the skull can be drilled;
2. when the drill point of the drill bit drills through the skull, the axial reaction force of the skull to the drill bit descends or disappears, the drill bit is ejected rightwards by the ejector rod under the action of the first compression spring, the end face teeth at the rear part of the drill bit are separated from the end face teeth at the front part of the connecting inner sleeve, a gap of about 0.2mm is reserved between the two planes, the drill bit is automatically cut off by the rotation moment of the output shaft of the electric drill, and the drill bit immediately stops rotating, so that the purpose of protection is achieved;
3. when the drill bit drills through the skull, the drill bit stops rotating, but the whole drill bit device is axially pushed, but the front end of the drill bit protective sleeve is clamped on the outer surface of the skull to offset the axial pushing force, so that double protection is realized;
4. only after the key shaft piece is inserted into the key slot of the coupling head and is relatively located, other drill bits and drill bit protective sleeves can be installed in place, after that, the coupling head jacket is pushed towards the drill bit, the key shaft piece is pulled out, and the coupling head jacket is released, so that the drill bit is replaced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of the structure of the present invention;
fig. 2 is a cross-sectional view of the key shaft member of the present invention.
In the figure: 11-connecting sleeve, 111-frustum connecting part, 112-connecting inner sleeve, 12-inverted taper hole, 13-first steel ball, 14-perforation, 15-first compression spring, 16-inner sleeve and 17-ejector rod; 21-a drill bit protective sleeve and 22-a drill bit; 31-a first arc groove and 32-a second arc groove; 41-coupling head, 411-key slot, 412-key shaft piece, 413-third circular arc slot, 42-clamping hole, 43-second steel ball, 44-second compression spring, 45-coupling head jacket, 46-clamping piece.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
referring to fig. 1-2, the embodiment specifically discloses a technical scheme of a drill bit device capable of stopping suddenly after drilling through skull, which comprises an output shaft, a coupling head assembly, a coupling sleeve assembly and a drill bit assembly;
one end of the connecting head component is assembled with the end part of the output shaft of the electric drill in a plugging manner, the other end of the connecting head component is assembled with the connecting sleeve component in a plugging manner, and the other end of the connecting sleeve component is assembled with the drill bit component in a sleeving manner;
the coupling sleeve assembly includes: the connecting sleeve, the back taper hole 12, the first steel ball 13, the perforation 14, the first compression spring 15, the inner sleeve 16 and the ejector rod 17; the circumference wall of the connecting sleeve is circumferentially provided with an inverted conical hole 12, a first steel ball 13 is arranged in the inverted conical hole 12, the right end side wall of the connecting sleeve is axially provided with a through hole 14, the inside of the connecting sleeve is slidably inserted with an inner sleeve 16, the opening of the right end of the inner sleeve 16 is slidably inserted with a push rod 17, the push rod 17 is connected with the inner sleeve 16 through a first compression spring 15, and the right end of the push rod 17 passes through the through hole 14;
the drill bit assembly includes: a bit protection sleeve 21 and a bit 22; the drill bit protective sleeve 21 is slidably and lockingly sleeved on the outer circumferential wall of the connecting sleeve, and a drill bit 22 is arranged at the opening of the right end of the drill bit protective sleeve 21 in a clearance manner.
Specifically, the coupling sleeve includes: a frustum coupling portion 111 and a coupling inner sleeve 112; the frustum coupling portion 111 and the coupling inner sleeve 112 are integrally formed.
Specifically, a first circular arc groove 31 and a second circular arc groove 32 are respectively formed on the left side of the outer circumferential wall of the inner sleeve 16 and the inner circumferential wall of the drill bit protective sleeve 21, and are respectively matched with the protruding surfaces of the first steel ball 13.
Specifically, the coupling head assembly includes: the coupling head 41, the clamping hole 42, the second steel ball 43, the second compression spring 44, the coupling head jacket 45 and the clamping piece 46; the outer sliding sleeve of the coupling head 41 is provided with a coupling head outer sleeve 45, a clamping piece 46 is embedded on the inner wall of the left end of the coupling head outer sleeve 45, the clamping piece 46 is connected with the shoulder of the right end of the coupling head 41 through a second compression spring 44, a clamping hole 42 is formed in the circumferential wall of the left side of the coupling head 41, a second steel ball 43 is assembled in the clamping hole 42, and meanwhile, the clamping piece 46 is matched with the protruding surface of the second steel ball 43.
Specifically, the inside of the coupling head 41 further includes an axially opened key slot 411, and at the same time, the key slot 411 is slidably inserted and assembled with a key shaft member 412, and the circumferential shaft wall of the key shaft member 412 further includes an opened third circular arc slot 413, which is matched with the protruding surface of the second steel ball 43.
Specifically, the method further comprises the following steps:
when the right end head of the drill bit 22 is propped against the skull, under the axial reaction of the skull, the drill bit 22 overcomes the pressure of the first compression spring 15 to axially displace, the end face teeth at the tail part of the left end of the drill bit 22 are meshed with the end face teeth at the right end of the connecting inner sleeve 112, the rotation moment on the output shaft of the electric drill is transmitted to the drill bit 22, and the drill bit 22 drills the skull;
when the axial reaction force of the skull is disappeared or is smaller than a certain value, the end face tooth at the tail part of the left end of the drill bit 22 and the end face tooth at the right end of the connecting inner sleeve 112 are in a separated state under the action of the ejector rod 17 and the first compression spring 15, the separation gap is 0.2mm, the rotation moment on the output shaft cannot be transmitted to the drill bit 22, and the drill bit 22 cannot drill the skull.
Specifically, the method further comprises the following steps:
the coupling inner sleeve 112 is provided with three back taper holes 12 on the circumference of the outer ring, the aperture of the back taper holes 12 is arranged in a large inner side and a small outer side, in the assembled state, the protruding surface of the first steel ball 13 is just matched with the second circular arc groove 32 on the drill bit protecting sleeve 21, so that the axial positioning is realized, and meanwhile, the drill bit 22 and the drill bit protecting sleeve 21 do not rotate together with the coupling inner sleeve 112;
when the key shaft member 412 is inserted into the key slot 411 on the coupling head 41 and is located relatively, at this time, the right end face of the key shaft member 412 pushes the inner sleeve 16 open and moves rightward for a certain distance, so that the first circular arc groove 31 on the inner sleeve 16 just falls onto the protruding circular arc surface of the first steel ball 13, and at this time, the first steel ball 13 moves radially inward, so as to achieve the purpose of separating the drill bit 22 and the drill bit protection sleeve 21 from the drill bit device.
Specifically, the method further comprises the following steps:
the drill bit protective sleeve 21 has a double protection function; on the one hand, the function of positioning and protecting the drill bit 22 and on the other hand, the function of avoiding the axial excessive impact of the drill bit 22;
the distance between the right end head of the drill bit 22 and the right end head of the drill bit protective sleeve 21 is determined according to the thickness of the skull; ensuring that the distance between the two is 1.5mm thicker than the thickness of the skull, stopping the rotation of the drill bit 22 after the drill bit 22 drills through the skull, but axially pushing the whole drill bit device, clamping the right end head of the drill bit protective sleeve 21 on the outer surface of the skull to counteract the axial pushing force, and realizing the double protection effect;
meanwhile, the drill protective sleeve 21 has various specifications, and the difference between the specifications is that the setting lengths of the right end part are different.
Specifically, the method also comprises the steps of installing the drill bit 22 and the drill bit protective sleeve 21,
namely: when the key shaft member 412 is inserted into the key slot 411 of the coupling head 41 and is relatively located, the right end face of the key shaft member 412 pushes the inner sleeve 16 to move rightward for a certain distance, at this time, the first circular arc groove 31 on the outer surface of the inner sleeve 16 just corresponds to the protruding circular arc surface of the first steel ball 13, the first steel ball 13 moves radially inwards, and at this time, the drill bit 22 and the drill bit protecting sleeve 21 are separated from the drill bit device;
on the contrary, only after the key shaft member 412 is inserted into the key slot 411 of the coupling head 41 and is relatively positioned, the bit 22 and the bit protection sleeve 21 are mounted in place, and then the coupling head housing 45 is pushed toward the bit 22, the key shaft member 412 is withdrawn, and the coupling head housing 45 is released, so that the bit 22 is completely replaced.
Specifically, the method further comprises the following steps:
before the key shaft member 412 is inserted into the key slot 411 of the coupling head 41, the coupling head jacket 45 is pushed to move rightward, so that the second compression spring 44 is compressed, and at this time, the elastic protrusion of the clamping member 46 is separated from the second steel ball 43, so that when the subsequent key shaft member 412 is inserted into the key slot 411 of the coupling head 41, the second circular arc slot 32 on the key shaft member 412 just corresponds to the protruding circular arc surface of the second steel ball 43.
Working principle: before the operation, the hole of the coupling head 41 is matched with the electric drill output shaft for guiding, and the flat guide is noted, and the installation is completed after the relative positioning. When the drill output rotational torque is transmitted to the coupling sleeve, only the coupling sleeve, coupling head 41 and drill output shaft rotate together, and the drill bit 22 and bit protective sheath 21 do not rotate or do not rotate with a small drag torque. Only when the head of the drill 22 is propped against the skull, the drill 22 generates axial tiny displacement of about 1mm against the pressure of the first compression spring 15 under the axial reaction of the skull, at this time, the rear end face teeth of the drill 22 are meshed with the front end face teeth of the coupling inner sleeve 112, at this time, the rotation moment of the electric drill is transmitted to the drill 22, and the skull can be drilled.
After the drill tip of the drill bit 22 drills through the skull, the axial reaction force of the skull to the drill bit 22 is reduced or eliminated, the drill bit 22 is ejected rightward by the ejector rod 17 under the action of the first compression spring 15, the end face teeth at the rear part of the drill bit 22 are separated from the end face teeth at the front part of the connecting inner sleeve 112, a gap of about 0.2mm is reserved between the two planes, the drill bit 22 is automatically cut off by the rotation moment of the electric drill output shaft, and the drill bit 22 immediately stops rotating, so that the purpose of protection is achieved.
The drill bit protective sleeve 21 has a double protection function, the distance between the front part of the drill bit 22 and the front end of the drill bit protective sleeve 21 can be measured on a CT (computed tomography) film according to the thickness of the skull, various specifications of the front end part of the drill bit protective sleeve 21 can be set, various choices can be made, the distance between the front end and the front end is about 1.5mm thicker than the thickness of the skull, after the drill bit 22 drills through the skull, the drill bit 22 stops rotating, but the whole drill bit device is axially pushed, but the front end of the drill bit protective sleeve 21 is clamped on the outer surface of the skull to offset the axial pushing force, and double protection is realized.
The steps of installing the drill bit 22 and the drill bit protective sheath 21 are as follows:
when the key shaft member 412 has a flat guide inserted into the key slot 411 of the coupling head 41 and is located opposite to the key slot, the front end surface of the key shaft member 412 pushes the inner sleeve 16 forward to move a distance, at this time, the first circular arc slot 31 on the outer surface of the inner sleeve 16 just corresponds to the circular arc surface of the first steel ball 13, the first steel ball 13 can move radially inward, and at this time, the drill bit 22 and the drill bit protecting sleeve 21 can be separated from the drill bit device. On the contrary, only after the key shaft member 412 is inserted into the key slot 411 of the coupling head 41 and is relatively positioned, the other bit 22 and the bit protection sleeve 21 can be mounted in place, and then the coupling head jacket 45 is pushed toward the bit 22, the key shaft member 412 is withdrawn, and the coupling head jacket 45 is released, so that the bit 22 is completely replaced.
When the drill bit 22 drills through the skull, the axial direction and the acting force of the skull on the drill bit 22 disappear or are smaller than a certain value, the device does not transmit moment to the drill bit 22 any more under the action of an internal mechanism, and the cutting moment of the drill bit 22 is automatically cut off, so that the drill bit 22 stops automatically after penetrating through the skull without damaging other purposes.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The drill bit device capable of stopping suddenly after the skull is penetrated by drilling is characterized by comprising an output shaft, a coupling head assembly, a coupling sleeve assembly and a drill bit assembly;
one end of the coupling head assembly is assembled with the end part of the output shaft of the electric drill in a plugging manner, the other end of the coupling head assembly is assembled with the coupling sleeve assembly in a plugging manner, and the other end of the coupling sleeve assembly is assembled with the drill bit assembly in a sleeving manner;
the coupling sleeve assembly includes: the device comprises a connecting sleeve, a back taper hole (12), a first steel ball (13), a perforation (14), a first compression spring (15), an inner sleeve (16) and a push rod (17); the circumference wall of the connecting sleeve is circumferentially provided with the back taper hole (12), the back taper hole (12) is internally provided with the first steel ball (13), the right end side wall of the connecting sleeve is axially provided with the through hole (14), the inside of the connecting sleeve is slidably inserted with the inner sleeve (16), the right end opening of the inner sleeve (16) is slidably inserted with the ejector rod (17), the ejector rod (17) is connected with the inner sleeve (16) through the first compression spring (15), and meanwhile, the right end of the ejector rod (17) penetrates through the through hole (14);
the drill bit assembly includes: a drill bit protective sleeve (21) and a drill bit (22); the drill bit protective sleeve (21) is arranged on the outer circumferential wall of the connecting sleeve in a sliding locking mode, and the drill bit (22) is arranged at the opening of the right end of the drill bit protective sleeve (21) in a gap mode;
the coupling sleeve comprises: a frustum coupling part (111) and a coupling inner sleeve (112); the frustum connecting part (111) and the connecting inner sleeve (112) are integrally formed;
a first circular arc groove (31) and a second circular arc groove (32) are respectively formed on the left side of the outer circumferential wall of the inner sleeve (16) and the inner circumferential wall of the drill bit protective sleeve (21), and are respectively matched with the convex surface of the first steel ball (13);
the coupling head assembly includes: the device comprises a coupling head (41), a clamping hole (42), a second steel ball (43), a second compression spring (44), a coupling head jacket (45) and a clamping piece (46); the outer sliding sleeve of the coupling head (41) is provided with the coupling head jacket (45), the inner wall of the left end of the coupling head jacket (45) is embedded with the clamping piece (46), the clamping piece (46) is connected with the shoulder of the right end of the coupling head (41) through the second compression spring (44), the left circumferential wall of the coupling head (41) is provided with the clamping hole (42), the second steel ball (43) is assembled in the clamping hole (42), and meanwhile, the clamping piece (46) is matched with the protruding surface of the second steel ball (43);
the inside of the coupling head (41) further comprises an axially arranged key slot (411), a key shaft piece (412) is assembled in a sliding insertion mode in the key slot (411), and a third circular arc slot (413) is formed in the circumferential shaft wall of the key shaft piece (412) and matched with the protruding surface of the second steel ball (43).
2. A drill bit assembly for enabling emergency stop after drilling through the skull as recited in claim 1, further comprising the following:
when the right end head of the drill bit (22) is propped against the skull, under the axial reaction of the skull, the drill bit (22) overcomes the pressure of the first compression spring (15) to axially displace, the end face teeth at the tail part of the left end of the drill bit (22) are meshed with the end face teeth at the right end of the connecting inner sleeve (112), the rotation moment on the output shaft of the electric drill is transmitted to the drill bit (22), and the drill bit (22) drills the skull;
when the axial reaction force of the skull is disappeared or smaller than a certain value, the end face teeth at the tail part of the left end of the drill bit (22) and the right end face teeth of the connecting inner sleeve (112) are in a separation state under the action of the ejector rod (17) and the first compression spring (15), the separation gap is 0.2mm, the rotation moment on the output shaft cannot be transmitted to the drill bit (22), and the drill bit (22) cannot drill the skull.
3. A drill bit assembly for emergency stop after drilling through the skull according to claim 2, further comprising the following:
the connecting inner sleeve (112) is provided with three inverted cone holes (12) on the circumference of the outer ring, the aperture of each inverted cone hole (12) is arranged in a large inner side and a small outer side, in an assembled state, the protruding surface of the first steel ball (13) is just matched with the second circular arc groove (32) on the drill bit protecting sleeve (21) to realize axial positioning, and meanwhile, the drill bit (22) and the drill bit protecting sleeve (21) do not rotate together with the connecting inner sleeve (112);
when the key shaft piece (412) is inserted into the key slot (411) on the coupling head (41) and is located relatively, at this time, the right end face of the key shaft piece (412) pushes up the inner sleeve (16) and moves rightwards for a certain distance, so that the first circular arc slot (31) on the inner sleeve (16) just falls onto the protruding circular arc face of the first steel ball (13), and at this time, the first steel ball (13) moves inwards in the radial direction, thereby achieving the purpose of separating the drill bit (22) and the drill bit protective sleeve (21) from the drill bit device.
4. A drill bit assembly for enabling emergency stop after drilling through the skull according to claim 3, further comprising the following:
the drill bit protective sleeve (21) has a double protection function; on the one hand, functions to locate and protect the drill bit (22) and, on the other hand, to avoid axial overshock of the drill bit (22);
the distance between the right end head of the drill bit (22) and the right end head of the drill bit protecting sleeve (21) is determined according to the thickness of the skull; ensuring that the distance between the two is 1.5mm thicker than the thickness of the skull, stopping rotating the drill bit (22) after the drill bit (22) drills through the skull, wherein the whole drill bit device is also axially pushed, and the right end head end of the drill bit protective sleeve (21) is clamped on the outer surface of the skull to counteract the axial pushing force so as to realize the function of double protection;
meanwhile, the drill bit protective sleeve (21) is in various specifications, and the difference of the various specifications is that the setting lengths of the end parts of the right end head are different.
5. A drill bit device capable of emergency stop after drilling through the skull according to claim 4, characterized by further comprising the steps of mounting the drill bit (22) and the drill bit protective sleeve (21), namely: when the key shaft piece (412) is inserted into the key slot (411) of the coupling head (41) and is located relatively, the right end face of the key shaft piece (412) pushes the inner sleeve (16) to move rightwards for a certain distance, at the moment, the first circular arc slot (31) of the outer surface of the inner sleeve (16) just corresponds to the protruding circular arc surface of the first steel ball (13), the first steel ball (13) moves inwards in the radial direction, and at the moment, the drill bit (22) and the drill bit protecting sleeve (21) are separated from the drill bit device;
conversely, the bit (22) and the bit protection sleeve (21) can be mounted in place only after the key shaft (412) is inserted into the key slot (411) of the coupling head (41) and is relatively dropped, and then the coupling head jacket (45) is pushed in the direction of the bit (22), the key shaft (412) is pulled out, and the coupling head jacket (45) is released, so that the bit (22) is completely replaced.
6. A drill bit assembly for enabling emergency stop after drilling through the skull as recited in claim 5, further comprising the following:
before the key shaft piece (412) is inserted into the key slot (411) of the coupling head (41), the coupling head jacket (45) is pushed to move rightwards, so that the second compression spring (44) is compressed, at the moment, the elastic bulge of the clamping piece (46) is separated from the second steel ball (43), and when the subsequent key shaft piece (412) is inserted into the key slot (411) of the coupling head (41), the second circular arc slot (32) on the key shaft piece (412) just corresponds to the protruding circular arc surface of the second steel ball (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111424862.3A CN114259275B (en) | 2021-11-26 | 2021-11-26 | Drill bit device capable of stopping suddenly after drilling skull |
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| CN202111424862.3A CN114259275B (en) | 2021-11-26 | 2021-11-26 | Drill bit device capable of stopping suddenly after drilling skull |
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| CN114259275B true CN114259275B (en) | 2024-04-09 |
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| CN202111424862.3A Active CN114259275B (en) | 2021-11-26 | 2021-11-26 | Drill bit device capable of stopping suddenly after drilling skull |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114259275A (en) | 2022-04-01 |
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