CN210408533U - Flexible direction-changing medical grinding cutter - Google Patents
Flexible direction-changing medical grinding cutter Download PDFInfo
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- CN210408533U CN210408533U CN201920254020.XU CN201920254020U CN210408533U CN 210408533 U CN210408533 U CN 210408533U CN 201920254020 U CN201920254020 U CN 201920254020U CN 210408533 U CN210408533 U CN 210408533U
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- 238000000227 grinding Methods 0.000 title claims abstract description 186
- 238000005452 bending Methods 0.000 claims abstract description 98
- 230000005540 biological transmission Effects 0.000 claims description 36
- 238000003801 milling Methods 0.000 claims 1
- 230000003044 adaptive effect Effects 0.000 abstract description 4
- 230000007704 transition Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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Abstract
The utility model relates to a flexible and direction-changing medical grinding tool, which comprises a grinding head component; the grinding head assembly is arranged in a mode of being capable of being bent upwards and downwards; the grinding head assembly comprises a grinding head and a bending adjusting support sleeve; one end of the bending adjusting support sleeve is provided with an upper end portion and a lower end portion, the corresponding cutter bar assembly is provided with an upper avoidance notch opposite to the upper end portion and a lower avoidance notch opposite to the lower end portion, when the grinding head assembly bends downwards, the lower end portion is contained in the lower avoidance notch, and when the grinding head assembly bends upwards, the upper end portion is contained in the upper avoidance notch. Its advantages are: the grinding head is enabled to flexibly turn, adaptive operation after the grinding part is changed can be achieved, operation steps are reduced, the angle needing to be rotated is reduced, operation is convenient, and the grinding head is more convenient to use.
Description
Technical Field
The utility model belongs to the technical field of the medical instrument technique and specifically relates to a medical grinding cutter of nimble diversion.
Background
In some orthopedic or other surgical procedures, it is sometimes necessary to grind bone tissue within a patient; the grinding head arranged at the front end of the cutter is driven by the power handle to rotate for grinding, but the grinding direction of the grinding head cannot be controlled due to external force when the operation part is deep and the surrounding side direction needs to be ground, so that the operation is very inconvenient; in order to overcome the problems, a medical lateral-bendable grinding tool capable of controlling the bending of the grinding head and revolving around the axis of the tool appears, and the lateral grinding of a deeper operation part is facilitated.
However, the medical grinding tool capable of lateral bending in practical use has the following defects and shortcomings:
the grinding head of the medical grinding tool capable of lateral bending in the prior art can be realized only in one way, namely, upward bending or downward bending can be realized, the grinding head cannot flexibly change the direction, the adaptive operation after the grinding part is changed cannot be realized, and the whole tool and the driving handle are only integrally turned, so that the use is very inconvenient.
Chinese patent document CN204158459U, the patent names are: the surgical cutter is convenient for adjusting the bending degree of the cutter head, the cutter head is bent mainly in a pushing mode in the scheme, and when the control tube moves towards the direction of the auxiliary body, the auxiliary body is pushed by pushing the double-end hinge rod. I.e. by pushing the double-ended hinge rod to drive the bit to bend.
Chinese patent document CN204995535U, the patent names are: the cutter head transmission device of the bone tissue grinding cutter mainly realizes the bending of the cutter head in a pulling mode, namely, the reciprocating driving sleeve moves backwards through power to drive the cutter bar component and drive the cutter head to move, so that the cutter head is bent.
As can be seen from the above patent documents, the bending modes of the driver bit are mainly "push" and "pull", but no corresponding disclosure is found on how to combine the two and provide corresponding structures so that the bit can be bent both upwards and downwards.
In view of the above, there is a need for a medical grinding tool that can be bent both upward and downward, and no report on such a medical grinding tool is found at present.
Disclosure of Invention
The utility model aims at providing a medical grinding cutter that can upwards buckle, can buckle downwards again.
In order to achieve the purpose, the utility model adopts the technical proposal that:
the medical grinding tool capable of changing directions flexibly comprises a grinding head assembly, a cutter bar assembly and a driving handle assembly; one end of the cutter bar assembly is connected with the grinding head assembly, and the other end of the cutter bar assembly is connected with the driving handle assembly; wherein, the grinding head component can be arranged in a mode of being bent upwards and downwards; the grinding head assembly comprises a grinding head and a bending adjusting support sleeve; one end of the bending adjusting support sleeve is provided with an upper end portion and a lower end portion, the corresponding cutter bar assembly is provided with an upper avoidance notch opposite to the upper end portion and a lower avoidance notch opposite to the lower end portion, when the grinding head assembly bends downwards, the lower end portion is contained in the lower avoidance notch, and when the grinding head assembly bends upwards, the upper end portion is contained in the upper avoidance notch.
As a preferred technical scheme, the cutter bar assembly comprises an outer cutter tube and an inner cutter tube, and the inner cutter tube is coaxially and rotatably matched with the outer cutter tube and is in transmission fit with the grinding head.
As a preferred technical scheme, a hinge groove is arranged on the grinding head; the inner knife pipe is internally provided with a transmission piece, the front end part of the transmission piece is provided with a soft shaft universal joint, the soft shaft universal joint is matched with a hinge groove on the grinding head, and the soft shaft universal joint and the transmission piece are integrally formed at one time; a control hinge is arranged in the outer cutter tube; the front end of the control hinge is hinged with the upper end part or the lower end part of the bending adjusting support sleeve; the rear end of the control hinge is inserted with a control pull tube.
As a preferable technical scheme, the bending axis of the grinding head, the self-rotating axis of the grinding head and the axis of the flexible shaft universal joint are intersected at one point.
As a preferred technical scheme, the handle driving component comprises a bending adjusting toggle button and an outer support body shell; the bending adjusting shifting button and the outer support shell are respectively provided with a thread section for the grinding head component to bend upwards and downwards, and the bending adjusting shifting button and the outer support shell are matched through the thread section.
As a preferred technical scheme, a control pull pipe is connected in the outer support body shell, and when the bending adjusting toggle button moves on the outer support body shell, the control pull pipe is driven to reciprocate, so that the grinding head assembly is enabled to bend upwards or downwards.
As a preferred technical scheme, the grinding head assembly controls the grinding head assembly to be bent through the bending adjusting toggle button, and when the bending adjusting toggle button rotates forwards and pushes forwards relative to the grinding head assembly, the grinding head assembly bends downwards; when the bending adjusting toggle button of the grinding head component rotates reversely and is pulled backwards relative to the grinding head component, the grinding head component bends upwards.
As a preferred technical scheme, the bending angle of the grinding head relative to the axis of the cutter bar assembly ranges from +36 degrees to-36 degrees.
As a preferred technical scheme, the thread section between the bending adjusting toggle button and the outer support shell is of a multi-thread structure.
As a preferable technical scheme, the thread section between the bending adjusting toggle button and the outer support shell is a double thread structure or a triple thread structure.
The utility model has the advantages that:
1. the utility model discloses a flexible direction-changing medical grinding tool, a grinding head component is arranged in a mode of being bent upwards and downwards; one end of the bending adjusting support sleeve is provided with an upper end portion and a lower end portion, the corresponding cutter bar assembly is provided with an upper avoidance notch opposite to the upper end portion and a lower avoidance notch opposite to the lower end portion, when the grinding head assembly bends downwards, the lower end portion is contained in the lower avoidance notch, and when the grinding head assembly bends upwards, the upper end portion is contained in the upper avoidance notch. The design mode enables the grinding head to flexibly turn, can realize the adaptive operation after the grinding part is changed, reduces the operation steps, and needs the rotation angle to be reduced, thereby being convenient for operation and more convenient for use.
2. The bending axis of the grinding head, the self-rotating axis of the grinding head and the axis of the flexible shaft universal joint are intersected at one point; the design mode can realize that the grinding head can be smoothly driven to do bending action in the operation process.
3. The bending angle range of the grinding head relative to the axis of the cutter bar assembly is +36 degrees to-36 degrees, comprehensive multi-angle grinding is realized within the angle range, a grinding blind area can be effectively avoided, and the grinding effect is optimal.
4. The flexible shaft universal joint adopts a non-rigid structure, can effectively improve the stability of the transmission part along the radial direction, avoids the transmission part from shaking, ensures the stability of the transmission part, reduces vibration during transmission and avoids the phenomenon that the front end is hinged to cause interference and stop.
5. The outer support body shell is internally connected with a control pull tube, and when the bending adjusting toggle button moves on the outer support body shell, the control pull tube is driven to move in a reciprocating manner, so that the grinding head assembly is enabled to bend upwards or downwards. This design comes the power that the transmission bistrique was buckled through the control trombone slide, and transmission performance is good, and whole simple structure, it is small to occupy.
6. The grinding head component can control the grinding head component to bend through the bending adjusting toggle button, and when the bending adjusting toggle button rotates forwards and pushes forwards relative to the grinding head component, the grinding head component bends downwards; when the bending adjusting toggle button of the grinding head component rotates reversely and is pulled backwards relative to the grinding head component, the grinding head component bends upwards. According to the design mode, the bending of the grinding head assembly is realized through the pushing and pulling actions, and the pushing and pulling actions are combined, so that the direction control of the grinding head assembly is flexible.
7. The thread section between the bending adjusting shifting button and the outer support shell is in a multi-thread structure, the multi-thread has the advantages that the thread lead is multiple times of that of a single thread, the thread lead angle of the multi-thread is large, the component force of the comprehensive force in the axial direction is small, the friction force formed by screwing the threads is small, and the angle adjusting is labor-saving.
Drawings
Fig. 1 is a schematic structural diagram of the medical grinding tool capable of flexibly changing directions of the utility model.
Fig. 2 is a structural schematic diagram of the grinding head assembly and the cutter bar assembly.
Fig. 3 is a structural schematic diagram of the grinding head assembly and the cutter bar assembly in a bent state.
Figure 4 is a cross-sectional schematic view of the grater assembly connected to the knife bar assembly.
FIG. 5 is a cross-sectional schematic view of the knife bar assembly coupled to the drive handle assembly.
Detailed Description
The invention will be further described with reference to the following examples and with reference to the accompanying drawings.
The reference numerals and components referred to in the drawings are as follows:
1. grinding head assembly 11, grinding head
12. Bending adjusting support sleeve 13, semicircular key
14. Hinge groove 2. cutter bar component
21. Outer knife pipe 22. inner knife pipe
23. Upper end 24, lower end
25. Upper clearance gap 26, lower clearance gap
27. Flexible shaft universal joint 28, control hinge
29. Front end fixed supporting sleeve for controlling pull tube 291
292. Copper sleeve 293 supporting sleeve
3. Drive handle assembly 31, front insert
311. Outer support body nose piece 32, outer support body mandrel
33. Bending adjusting toggle button 34, direction adjusting toggle button
35. Spring 36 washer
37. Push sleeve 38, adjusting nut insert
39. Outer support body shell 391 rear end part of outer support body mandrel
392. 393 transition sleeve of locating sleeve
394. Inner planer tool support blank 395 sealing ring
396. Inner cutter transition connecting sleeve
For more clear understanding of the technical solution of the present invention, the following schemes use the terms of orientation such as "front end", "rear end", "upper", "lower", etc., and these terms of orientation are always named as reference according to the middle drawing direction of the present embodiment, and do not represent the actual orientation.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a flexible direction-changing medical grinding tool of the present invention. The medical grinding tool capable of changing directions flexibly comprises a grinding head assembly 1, a cutter bar assembly 2 and a driving handle assembly 3; one end of the cutter bar component 2 is connected with the grinding head component 1, and the other end is connected with the driving handle component 3; the driving handle component 3 is provided with a direction adjusting toggle button 34 and a bending adjusting toggle button 33.
Referring to fig. 2 and 3, fig. 2 is a schematic structural view of the grinding head assembly 1 connected with the tool bar assembly 2. Fig. 3 is a structural schematic view of the grinding head assembly 1 and the tool bar assembly 2 in a bent state. The grinding head assembly 1 can be arranged in an upward bending and downward bending mode; the grinding head assembly 1 comprises a grinding head 11 and a bending adjusting support sleeve 12; one end of the bending adjusting support sleeve 12 is provided with an upper end portion 23 and a lower end portion 24, the corresponding cutter bar assembly 2 is provided with an upper avoidance gap 25 opposite to the upper end portion 23 and a lower avoidance gap 26 opposite to the lower end portion 24, when the grinding head assembly 1 bends downwards, the lower end portion 24 is accommodated in the lower avoidance gap 26, and when the grinding head assembly 1 bends upwards, the upper end portion 23 is accommodated in the upper avoidance gap 25.
Referring to fig. 4, fig. 4 is a schematic sectional view of the grinding head assembly 1 and the tool bar assembly 2 connected together. The grinding head 11 is provided with a hinge groove 14; the cutter bar assembly 2 comprises an outer cutter tube 21 and an inner cutter tube 22, and the inner cutter tube 22 is coaxially and rotatably matched with the outer cutter tube 21 and is in transmission fit with the grinding head 11; a transmission member (not shown in the figure) is arranged in the inner cutter tube 22, a flexible shaft universal joint 27 is arranged at the front end part of the transmission member, the flexible shaft universal joint 27 is matched with the hinge groove 14 on the grinding head 11, and the flexible shaft universal joint 27 and the transmission member are integrally formed at one time; the bending axis of the grinding head 11, the self-rotating axis of the grinding head 11 and the axis of the flexible shaft universal joint 27 are intersected at one point; a control hinge 28 is arranged in the outer cutter tube 21; the front end of the control hinge 28 is hinged with the upper end part 23 or the lower end part 24 of the bending adjustment support sleeve 12; the rear end of the control hinge 28 is inserted with a control pull tube 29.
Referring to fig. 5, fig. 5 is a cross-sectional view illustrating the connection between the knife bar assembly 2 and the driving handle assembly 3. The handle driving component comprises a bending adjusting toggle button 33 and an outer support body shell 39; the bending adjusting toggle button 33 and the outer support shell 39 are both provided with thread sections for bending the grinding head component 1 upwards and downwards; the bending adjusting toggle button 33 is matched with the outer support body shell 39 through threads; the control pull tube 29 (see fig. 4) is connected in the outer support shell 39, and when the bending adjustment toggle button 33 moves on the outer support shell 39, the control pull tube 29 is driven to reciprocate, so that the grinding head assembly 1 is bent upwards or downwards.
In the embodiment, a semicircular key 13 is arranged, and the bending adjusting support sleeve 12 and the grinding head 11 are fixedly connected through the semicircular key 13. The design mode adopts the semicircular key 13, is convenient to manufacture and easy to disassemble and assemble, and simultaneously ensures that the connection between the bending adjusting support sleeve 12 and the grinding head 11 is compact and reliable.
In this embodiment, a front end fixing support sleeve 291 is provided, the front end fixing support sleeve 291 is provided on the outer peripheral surface of the control hinge 28, and the front end fixing support sleeve 291 is interposed between the control hinge 28 and the outer tube 21. This design has the supporting role to front end fixed support cover 291, has the fixed role to outer sword pipe 21.
In this embodiment, a copper sleeve 292 is provided, and the copper sleeve 292 is disposed on the outer peripheral surface of the transmission member and at the front end of the inner cutter tube 22. By utilizing the rigidity characteristic of the copper sleeve 292, the transmission part cannot deform in the radial direction during assembly, the stability of an assembly position can be effectively ensured, and the transmission efficiency is high; meanwhile, the copper sleeve 292 is high in structural strength, large torque can be output to the grinding head 11, the transmission structural strength for driving the grinding head 11 to rotate is high, the grinding efficiency can be increased, and the operation time is shortened.
In this embodiment, a support sleeve 293 is provided, and the support sleeve 293 is provided between the inner cutter tube 22 and the control pull tube 29. This design allows independent movement between the pull tube 29 and the inner cutter tube 22. In the use state, the inner cutter tube 22 rotates, the control pull tube 29 moves linearly, and the support sleeve 293 is arranged, so that a gap exists between the control pull tube 29 and the inner cutter tube 22, and the movement of the control pull tube 29 and the inner cutter tube 22 is not influenced.
In this embodiment, the handle driving assembly includes a front end insert 31, an outer support front end part 311, an outer support mandrel 32, a direction adjusting toggle button 34, a spring 35, a washer 36, a push sleeve 37, and an adjusting nut insert 38; the outer peripheral surface of the outer support body mandrel 32 is provided with an outer support body front end part 311; the front end insert 31 is arranged at the front end part of the front end part 311 of the outer support body; the direction adjusting dial button 34 is arranged on the outer peripheral surface of the outer support body front end part 311, a gap exists between the direction adjusting dial button 34 and the outer support body front end part 311, and a spring 35 is arranged in the gap; the rear end of the front end piece 311 of the outer support body is provided with a push sleeve 37; the push sleeve 37 is provided with an adjusting nut insert 38. In this embodiment, the direction adjustment dial 34 is rotated to transmit a rotational force to the outer support body nose piece 311, and the outer support body nose piece 311 transmits a force to the outer support body core shaft 32 and then to the inner cutter tube 22, thereby performing the function of rotational grinding of the grinder assembly 1. The front insert 31 mainly acts to seal the front end of the outer support mandrel 32. The spring 35 provides the functions of supporting and transferring force for the spring 35 between the direction adjusting dial button 34 and the front end piece 311 of the outer support body, and the maneuverability is good. The push sleeve 37 and the adjusting nut insert 38 are used for axial limiting of an outer support body shell 39.
In this embodiment, the drive assembly comprises an outer support mandrel rear end part 391, a locating sleeve 392, a transition sleeve 393, an inner planer tool support blank 394, a seal ring 395, and an inner tool transition connecting sleeve 396; the transition sleeve 393 is arranged on the peripheral surface of the cutter bar component 2; the outer peripheral surface of the transition sleeve 393 is provided with an outer support body mandrel rear end part 391; the end of the rear end part 391 of the mandrel of the outer support body is butted with an inner planer tool support body blank 394; an inner cutter transition connecting sleeve 396 is arranged at the rear end of the inner planer tool support body blank 394; and a sealing ring 395 is arranged on the peripheral surface of the inner cutter transition connecting sleeve 396.
It should be noted that:
the bending axis of the grinding head 11, the self-rotating axis of the grinding head 11 and the axis of the flexible shaft are intersected at one point; the bending axis of the grinding head 11, the self-rotating axis of the grinding head 11 and the flexible shaft universal joint 27 are intersected at one point under the driving of the inner cutter tube 22; the design mode can realize that the grinding head 11 can be smoothly driven to do bending action in the operation process, and the problem that the grinding head 11 is bent or self-rotated, blocked or shaken due to the fact that the axes do not intersect at one point is avoided; in the rotation process of the grinding head 11, the stable transmission of the grinding head 11 is ensured, the grinding efficiency of the grinding head 11 is ensured, and the working efficiency is increased.
The grinding head assembly 1 can be arranged in an upward bending and downward bending mode; an upper end part 23 and a lower end part 24 are arranged at one end of the bending adjusting support sleeve 12, an upper avoidance notch 25 opposite to the upper end part 23 and a lower avoidance notch 26 opposite to the lower end part 24 are arranged on the corresponding cutter bar assembly 2, when the grinding head assembly 1 is bent downwards, the lower end part 24 is accommodated in the lower avoidance notch 26, and when the grinding head assembly 1 is bent upwards, the upper end part 23 is accommodated in the upper avoidance notch 25; this design mode makes bistrique 11 turn to in a flexible way, can realize the adaptability operation after the grinding position changes, has reduced the operating procedure, and the angle that needs the rotation diminishes, and the operation of being convenient for is more convenient to use.
The bending angle range of the grinding head 11 relative to the axis of the cutter bar assembly 2 is +36 degrees to-36 degrees, comprehensive multi-angle grinding is realized within the angle range, a grinding blind area can be effectively avoided, and the grinding effect is optimal.
The cutter bar assembly 2 comprises an outer cutter tube 21 and an inner cutter tube 22, and the inner cutter tube 22 is coaxially and rotatably matched with the outer cutter tube 21 and is in transmission fit with the grinding head 11. This design enables the grinding heads 11 to be arranged in a self-rotating manner, and the grinding heads 11 perform grinding in a self-rotating manner.
The flexible shaft universal joint 27 and the hinge groove 14 form a hinge mechanism, so that the rotary power can be conveniently transmitted to the grinding head 11, the transmission performance is stable, and the processing and the installation are convenient.
The flexible shaft universal joint 27 adopts a non-rigid structure, can effectively improve the stability of the transmission part along the radial direction, avoids the transmission part from shaking, ensures the stability of the transmission part, reduces vibration during transmission and avoids the phenomenon that the front end is hinged to cause interference and stop.
The control hinge 28 is arranged in a reciprocating mode with a single degree of freedom along the axial direction, and the front end of the control hinge 28 is hinged on the bending adjustment support sleeve 12. The control hinge 28 is preferably arranged as an elastic section capable of bending along the radial direction, and the control hinge 28 is bent along the radial direction to ensure that the control hinge 28 is driven smoothly along the axial direction, so that the drive is prevented from being locked, and the surgical knife is ensured to be operated smoothly.
The control pull tube 29 is connected in the outer support shell 39, and when the bending adjusting toggle button 33 moves on the outer support shell 39, the control pull tube 29 is driven to move back and forth, so that the grinding head component 1 is bent upwards or downwards. This design comes the power that transmits bistrique 11 and buckle through control trombone slide 29, and transmission performance is good, and whole simple structure occupies smallly.
The grinding head assembly 1 can control the grinding head assembly 1 to bend through the bending adjusting toggle button 33, and when the bending adjusting toggle button 33 rotates in the positive direction and pushes forwards relative to the grinding head assembly 1, the grinding head assembly 1 bends downwards; when the bending adjustment dial 33 of the grinder assembly 1 is reversely rotated and pulled backward with respect to the grinder assembly 1, the grinder assembly 1 is bent upward. This design mode realizes the bending of bistrique subassembly 1 through the action of "pushing" and "pulling" for the directional control of bistrique subassembly 1 is nimble.
The thread section between the bending adjusting dial button 33 and the outer support body shell 39 is in a multi-thread structure, the multi-thread has the advantages that the thread lead is multiple times of that of a single thread, the thread lead angle of the multi-thread is large, the component force of the comprehensive force in the axial direction is small, the friction force formed by screwing of the threads is small, and the angle adjusting is labor-saving. Preferably the multiple start thread is a double start thread or a triple start thread. The movement of the bending adjustment dial 33 drives the control pull tube 29 to move, and the control pull tube 29 controls the rotation angle of the head, so that the position of the bending adjustment dial 33 controls the angle of the head. And the moving range and moving speed of the bending adjustment dial 33 are controlled by the screw thread between the bending adjustment dial 33 and the outer support body housing 39. Therefore, the length of the matching thread is doubled, and the grinding head assembly can be adjusted within the stroke range required by upward bending or downward bending.
The utility model discloses a flexible direction-changing medical grinding tool, a grinding head component 1 is arranged in a mode of being bent upwards and downwards; one end of the bending adjusting support sleeve 12 is provided with an upper end portion 23 and a lower end portion 24, the corresponding cutter bar assembly 2 is provided with an upper avoidance gap 25 opposite to the upper end portion 23 and a lower avoidance gap 26 opposite to the lower end portion 24, when the grinding head assembly 1 bends downwards, the lower end portion 24 is accommodated in the lower avoidance gap 26, and when the grinding head assembly 1 bends upwards, the upper end portion 23 is accommodated in the upper avoidance gap 25. The design mode enables the grinding head 11 to flexibly steer, can realize adaptive operation after the grinding part is changed, reduces operation steps, and is convenient to operate and use because the angle required to rotate is reduced; the bending axis of the grinding head 11, the self-rotating axis of the grinding head 11 and the axis of the flexible shaft universal joint 27 are intersected at one point; the design mode can realize that the grinding head 11 can be smoothly driven to do bending action in the operation process; the bending angle range of the grinding head 11 relative to the axis of the cutter bar assembly 2 is +36 degrees to-36 degrees, comprehensive multi-angle grinding is realized within the angle range, a grinding blind area can be effectively avoided, and the grinding effect is optimal; the flexible shaft universal joint 27 adopts a non-rigid structure, so that the stability of the transmission member in the radial direction can be effectively improved, the transmission member is prevented from shaking, the transmission stability of the transmission member is ensured, the vibration is reduced during transmission, and the phenomenon that the front end is hinged to cause interference to cause clamping is avoided; the control pull tube 29 is connected in the outer support shell 39, and when the bending adjusting toggle button 33 moves on the outer support shell 39, the control pull tube 29 is driven to move back and forth, so that the grinding head component 1 is bent upwards or downwards. The design mode transmits the bending power of the grinding head 11 by controlling the pull tube 29, has good transmission performance, simple whole structure and small occupied volume; the grinding head assembly 1 can control the grinding head assembly 1 to bend through the bending adjusting shifting button 33, and when the bending adjusting shifting button 33 rotates forwards and pushes forwards relative to the grinding head assembly 1, the grinding head assembly 1 bends downwards; when the bending adjustment dial 33 of the grinder assembly 1 is reversely rotated and pulled backward with respect to the grinder assembly 1, the grinder assembly 1 is bent upward. According to the design mode, the bending of the grinding head assembly 1 is realized through the pushing and pulling actions, so that the direction control is flexible; the thread section between the bending adjusting dial button 33 and the outer support body shell 39 is in a multi-thread structure, the multi-thread has the advantages that the thread lead is multiple times of that of a single thread, the thread lead angle of the multi-thread is large, the component force of the comprehensive force in the axial direction is small, the friction force formed by screwing of the threads is small, and the angle adjusting is labor-saving.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the principles of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The medical grinding tool capable of changing directions flexibly comprises a grinding head assembly, a cutter bar assembly and a driving handle assembly; one end of the cutter bar assembly is connected with the grinding head assembly, and the other end of the cutter bar assembly is connected with the driving handle assembly; the grinding head component is characterized in that the grinding head component can be arranged in an upward bending and downward bending mode; wherein,
the grinding head assembly comprises a grinding head and a bending adjusting support sleeve; one end of the bending adjusting support sleeve is provided with an upper end portion and a lower end portion, the corresponding cutter bar assembly is provided with an upper avoidance notch opposite to the upper end portion and a lower avoidance notch opposite to the lower end portion, when the grinding head assembly bends downwards, the lower end portion of the bending adjusting support sleeve is accommodated in the lower avoidance notch, and when the grinding head assembly bends upwards, the upper end portion of the bending adjusting support sleeve is accommodated in the upper avoidance notch.
2. The flexible medical grinding tool of claim 1 wherein the cutter bar assembly comprises an outer cutter tube and an inner cutter tube, the inner cutter tube coaxially and rotationally fits the outer cutter tube, and the inner cutter tube is in driving fit with the grinding head.
3. The flexible medical grinding tool of claim 2 wherein the grinding head is provided with a hinge slot; the inner knife pipe is internally provided with a transmission piece, the front end part of the transmission piece is provided with a soft shaft universal joint, the soft shaft universal joint is matched with a hinge groove on the grinding head, and the soft shaft universal joint and the transmission piece are integrally formed at one time; a control hinge is arranged in the outer cutter tube; the front end of the control hinge is hinged with the upper end part or the lower end part of the bending adjustment support sleeve.
4. The flexible medical grinding tool of claim 3 wherein the bending axis of the grinding head, the self-rotating axis of the grinding head and the axis of the flexible shaft universal joint intersect at a point.
5. The flexible medical milling cutter according to claim 1 wherein said handle drive assembly comprises a bend adjustment dial, an outer support housing; the bending adjusting shifting button and the outer support shell are respectively provided with a thread section for the grinding head component to bend upwards and downwards, and the bending adjusting shifting button and the outer support shell are matched through the thread section.
6. The flexible medical grinding tool according to claim 5 wherein the outer support housing has a control pull tube connected thereto, and when the bending adjustment knob moves on the outer support housing, the control pull tube is driven to reciprocate to cause the grinding head assembly to bend upward or downward.
7. The flexible medical grinding tool according to claim 6 wherein the grinding head assembly is configured to bend by a bending adjustment knob to control the bending of the grinding head assembly, and when the bending adjustment knob is rotated in a forward direction and pushed forward relative to the grinding head assembly, the grinding head assembly bends downward; when the bending adjusting toggle button of the grinding head component rotates reversely and is pulled backwards relative to the grinding head component, the grinding head component bends upwards.
8. The flexible direction changing medical grinding tool of claim 1 wherein the angle of bending of said grinding head with respect to the axis of said tool holder assembly is in the range of +36 ° to-36 °.
9. The flexible medical grinding tool of claim 5 wherein the thread segment between the bend adjustment knob and the outer support housing is a multi-start thread.
10. The flexible medical grinding tool of claim 9 wherein the thread segment between the bend adjustment knob and the outer support housing is a double thread or triple thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920254020.XU CN210408533U (en) | 2019-02-28 | 2019-02-28 | Flexible direction-changing medical grinding cutter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920254020.XU CN210408533U (en) | 2019-02-28 | 2019-02-28 | Flexible direction-changing medical grinding cutter |
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| CN210408533U true CN210408533U (en) | 2020-04-28 |
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| CN201920254020.XU Active CN210408533U (en) | 2019-02-28 | 2019-02-28 | Flexible direction-changing medical grinding cutter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111938745A (en) * | 2020-08-20 | 2020-11-17 | 北京华腾创新科技有限公司 | Medical universal drill |
| CN113303864A (en) * | 2020-06-30 | 2021-08-27 | 重庆西山科技股份有限公司 | Elbow pipe grinding tool with angle-adjustable tool bit |
-
2019
- 2019-02-28 CN CN201920254020.XU patent/CN210408533U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113303864A (en) * | 2020-06-30 | 2021-08-27 | 重庆西山科技股份有限公司 | Elbow pipe grinding tool with angle-adjustable tool bit |
| CN113303864B (en) * | 2020-06-30 | 2023-03-14 | 重庆西山科技股份有限公司 | Elbow pipe grinding tool with angle-adjustable tool bit |
| CN111938745A (en) * | 2020-08-20 | 2020-11-17 | 北京华腾创新科技有限公司 | Medical universal drill |
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