CN208426164U - Grinding knife tool with location structure - Google Patents

Abstract

The utility model provides a kind of grinding knife tool with location structure, including bistrique, outer knife pipe, interior knife pipe and the rigid shaft being coaxially disposed in outer knife pipe, the rigid shaft is connected between interior knife pipe and bistrique and transmits torque, is provided between the rigid shaft and outer knife pipe for the location structure to rigid shaft radial centering.Location structure is arranged between rigid shaft and outer knife pipe in the utility model, feels relieved when being on the one hand packed into convenient for rigid shaft, on the other hand when rotating at high speed, reduces the beat that rigid shaft is generated by centrifugation, guarantees its stability.

Description

Grinding knife tool with location structure

Technical field

The utility model belongs to the field of medical instrument technology, and in particular to a kind of grinding knife tool with location structure.

Background technique

In bone surgery, generallys use grinding knife tool and polish internal bone tissue.Currently, be divided into can for grinding knife tool Deflecting abrasive drilling and can not deflecting abrasive drilling, can not deflecting abrasive drilling bistrique power handle driving under high speed rotation polish bone tissue. Reversible abrasive drilling increased on the basis of realizable abrasive drilling driving bistrique pitching motion driving mechanism, thus bistrique in addition to It can be other than rotation, moreover it is possible to be bent, to change grinding position, use scope is wider.

For above two abrasive drilling, bistrique rotation driving structure it is similar, generally comprise power handle, knife tube assembly and It is installed on the bistrique of knife tube assembly front end, wherein knife tube assembly has the interior knife pipe and outer knife pipe of coaxial arrangement, interior knife pipe and mill Torque is transmitted by transmission shaft between head, power handle drives crusher drill high speed rotation polishing bone group by interior knife pipe and transmission shaft It knits.

Wherein, can not deflecting abrasive drilling, since transmission shaft and bistrique are structure as a whole.When driving bistrique rotation, transmission shaft Pole built on the sand, influences operation and is normally carried out under high speed rotation.

And reversible abrasive drilling, power, when in use, flexible drive axle are generally transmitted using flexible drive axle in the prior art It is easily broken off, influences normal surgical.If transmission shaft uses stiff shaft instead, pole is built on the sand under high speed rotation.

Therefore, either reversible abrasive drilling still can not deflecting abrasive drilling, using rigid shaft transmit power when, all exist Transmission shaft pole under high speed rotation built on the sand, influences the problem of operation is normally carried out.

Utility model content

In view of the above deficiencies of the prior art, the purpose of this utility model is to provide a kind of mills with location structure Cutting knife tool, the stability of enhancing transmission shaft when rotating at high speed.

In order to achieve the above objects and other related objects, technical solutions of the utility model are as follows:

A kind of grinding knife tool with location structure, including bistrique, outer knife pipe, the interior knife pipe being coaxially disposed in outer knife pipe And rigid shaft, the rigid shaft are connected between interior knife pipe and bistrique and transmit torque, the rigid shaft with It is provided between outer knife pipe for the location structure to rigid shaft radial centering.

Using the above structure, location structure is set between rigid shaft and outer knife pipe, is on the one hand convenient for positive drive Axis is felt relieved when being packed into, and on the other hand when rotating at high speed, is reduced the beat that rigid shaft is generated by centrifugation, is guaranteed that it is firm Property.

Further, the location structure is positioning sleeve, and positioning sleeve is coaxially set on rigid shaft.

Further, the rigid shaft is multi-diameter shaft, and major diameter section is connect with bistrique, path section and the fixed company of interior knife pipe It connects；The positioning sleeve is on axial position between interior knife pipe and the shaft shoulder.

Further, interior knife pipe is inserted at the path section rear portion of the rigid shaft, and is welded with interior knife pipe.

Further, it is provided between the rigid shaft and outer knife pipe for limiting rigid shaft relative to outer knife pipe The position limiting structure of axial movement.

In bistrique bruting process, when resistance by bone tissue, it can prevent bistrique, rigid shaft and interior knife pipe from generating It retracts, guarantees that operation is normally carried out.

Further, the grinding knife tool is reversible grinding knife tool, has the bending tune for driving bistrique pitching motion Save component.

Further, the outer knife pipe front end is rotatably connected to installation sheath, and outer knife pipe rear portion and the bending adjust component and connect It connects, it is intrathecal that the bistrique is located at the installation, and bistrique tail end and rigid shaft front end are rotatablely connected.Component is adjusted by bending to drive Rotary bistrique pitching motion forms reversible grinding knife tool to realize deflecting.

Further, wearing bush is coaxially equipped between the interior knife pipe and outer knife pipe, which covers on interior knife pipe.Subtract Friction between small interior knife pipe and outer knife pipe reduces fever.

Further, the bistrique circumferentially offers locating slot, is symmetrical arranged that there are two locating piece, institutes on the installation sheath Locating piece is stated to protrude into locating slot to bistrique axially position.Intrathecal position is being installed to bistrique by two symmetrical locating pieces Axially position is carried out, keeps its axially position more stable.

Further, the bistrique is fixedly connected or is integrally formed with rigid shaft, the rigid shaft rear portion insertion Interior knife pipe, and fixed with interior knife pipe.The structure is can not deflecting grinding knife tool.

As described above, the beneficial effects of the utility model are: being arranged between rigid shaft and outer knife pipe for feeling relieved Location structure, on the one hand convenient for rigid shaft be packed into when feel relieved, on the other hand when rotating at high speed, reduce rigid shaft The beat generated by centrifugation guarantees its stability.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of embodiment 1；

Fig. 2 is the mounting structure schematic diagram of embodiment 1 China and foreign countries' knife pipe and interior knife tube assembly；

Fig. 3 is the structural schematic diagram of interior knife tube assembly in embodiment 1；

Fig. 4 is A-A view in Fig. 2；

Fig. 5 is B-B view in Fig. 2；

Fig. 6 is the structural schematic diagram of embodiment 2；

Fig. 7 is the mounting structure schematic diagram of embodiment 2 China and foreign countries' knife pipe and interior knife tube assembly.

Piece mark explanation

1 outer knife pipe

Knife tube assembly in 2

Knife pipe in 21

22 rigid shafts

23 limited ring grooves

24 positive stop keys

3 bistriques

4 installation sheaths

5 power subs

61 locating slots

62 locating pieces

7 wearing bush

8 positioning sleeves

Specific embodiment

The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this Content disclosed by specification understands other advantages and effect of the utility model easily.

Front and back position herein is with grinding knife tool use state for reference, and bistrique is in preceding power handle rear.

Embodiment 1

As depicted in figs. 1 and 2, with the grinding knife tool of location structure, including bistrique 3, interior knife tube assembly 2, outer knife pipe 1 and Power sub 5 for connecting with power source etc., interior knife tube assembly 2 are coaxially disposed in outer knife pipe 1, and can be relative to outer knife pipe 1 rotation, wherein interior knife tube assembly 2 includes interior knife pipe 21 and rigid shaft 22, rigid shaft 22 be connected to interior knife pipe 21 with Between bistrique 3 and torque is transmitted, is passed it is critical that being coaxially disposed between rigid shaft 22 and outer knife pipe 1 for rigidity The positioning sleeve 8 of 22 radial centering of moving axis, the positioning sleeve 8 are solidly set on rigid shaft 22.

For convenient for assembly, rigid shaft 22 is multi-diameter shaft, and major diameter section is connect with bistrique, path section and interior knife in this example Pipe 21 is fixedly connected；Positioning sleeve 8 on axial position between interior knife pipe 21 and the shaft shoulder, that is, cover interior knife pipe 21 and the shaft shoulder it Between path section on.To be inserted into interior knife pipe 21 convenient for the path section rear portion of fixation, rigid shaft 22, and welded with interior knife pipe 21 It connects.

Further, to reduce the friction between interior knife pipe 21 and outer knife pipe 1, fever is reduced.In interior knife pipe 21 and outer knife pipe 1 Between be coaxially disposed wearing bush 7, wearing bush 7 is solidly set on outside interior knife pipe 21 in this example, and polytetrafluoroethylene (PTFE) can be used in wearing bush 7 Equal wear-resistant materials are made.

As a further improvement, it is provided between rigid shaft 22 and outer knife pipe 1 for preventing rigid shaft 22 position limiting structures moved axially backward relative to outer knife pipe 1.Axial limit is carried out to interior knife tube assembly 2 by rigid shaft 22 Position, can prevent bistrique 3 polish bone tissue by resistance when bistrique 3 and interior knife tube assembly 2 generate rollback, guarantee operation normally into Row.

Further as shown in Figures 2 to 5, position limiting structure is the limited ring groove 23 and positive stop key 24 matched, limited ring groove 23 and positive stop key 24 it is corresponding on axial position, by the cooperation of limited ring groove 23 and positive stop key 24, interior knife tube assembly 2 can be prevented The axial relative movement between outer knife pipe 1, but be relatively rotatable to each other in the circumferential.Rigid shaft 22 and outer knife pipe 1 it Between set limited ring groove 23 and positive stop key 24, prevent interior knife tube assembly 2 from retracting relative to outer knife pipe 1, guarantee operation go on smoothly, And it assembles simply, position limiting structure is firm.

In this example, limited ring groove 23 is provided in the major diameter section of rigid shaft 22, and positive stop key 24 is fixed on outer knife pipe 1 On.Limited ring groove 23 is arranged on rigid shaft 22, and process and assemble is convenient, and structure is more firm.

For the installation convenient for positive stop key 24, the axial position on outer knife pipe 1 corresponding to limited ring groove 23 is offered for limit The installation window that position key 24 is packed into, positive stop key 24 pass through the installation window and protrude into limited ring groove 23, and by welding It is fixed on outer knife pipe 1.The installation that the structure is convenient for is fixed.Limited ring groove 23 it is axially disposed at least one, can be 1,2 A or multiple, the quantity of positive stop key 24 is corresponding with limited ring groove 23.

Wherein, positive stop key 24 be in semi-circular shape, have with the matched external profile surface of outer knife pipe 1, to guarantee cutter contour structures Planarization and consistency.

In this example grinding knife tool be preferably bistrique can pitching motion reversible grinding knife tool, be arranged in power sub 5 Have for driving the bending of bistrique deflecting to adjust component, which adjusts component and connect with outer 1 rear transfer of knife pipe, outer knife pipe 1 Front end is rotatably connected to installation sheath 4, and the bar portion of bistrique 3 is located in the installation sheath 4,3 tail end of bistrique and 22 front end of rigid shaft Rotation connection, interior knife pipe 21 is inserted at 22 rear portion of rigid shaft, and is welded and fixed with interior knife pipe 21, and 3 tail end of bistrique offers U-shaped Slot, 22 front end of rigid shaft have articulated shaft, form T-type structure with rigid shaft 22, which protrudes into U-type groove and its It is rotatably assorted.Can the grinding knife tool of pitching motion its pitching driving method already belong to the prior art, details are not described herein.

Wherein, bistrique 3 circumferentially offers locating slot 61, installs locating piece 62 there are two being symmetrical arranged on sheath 4, locating piece 62 protrude into locating slot 61 to 3 axially position of bistrique.Bistrique 3 is being installed in sheath 4 by symmetrically arranged two locating pieces 62 Position carry out axially position, it is more stable when making its rotation.Locating piece 62 has and installs the matched outer arcuate external profile surface of sheath 4, Locating piece 62 can be fixed on by welding on installation sheath 4.

Embodiment 2

As shown in Figure 6 and Figure 7, with reversible grinding knife tool in embodiment 1 the difference is that, be immutable in this example To grinding knife tool, 3 rotations of bistrique are unable to pitch regulation, because adjusting component without being bent, cancel interior knife pipe 21 and outer knife pipe 1 Between wearing bush.Bistrique 3 is fixedly connected with rigid shaft 22 or rigid shaft 22 is extended to form by 3 rear end of bistrique, 8 sets of positioning sleeve outside the path section of rigid shaft 22, and are located at 21 front of interior knife pipe, and 22 path section rear portion of rigid shaft is inserted Enter interior knife pipe 21, and is welded and fixed with interior knife pipe 21.Limited ring groove 23 is equally provided in the major diameter section of rigid shaft 22, often A limited ring groove 23 is correspondingly arranged a positive stop key 24, or two positive stop keys are symmetrical arranged on 23 axial position of limited ring groove 24, the installation form of positive stop key 24 is same as Example 1.Since bistrique 3 and rigid shaft 22 are integrated, only need to limit Position key 24 and limited ring groove 23 cooperate the axially position that knife tube assembly 2 in entire can be realized, to prevent from retracting.

Positioning sleeve is arranged between rigid shaft and outer knife pipe in the utility model, on the one hand fills convenient for rigid shaft On the other hand when rotating at high speed fashionable centering reduces the beat that rigid shaft is generated by centrifugation, guarantees its stability. Limited ring groove and positive stop key are set between rigid shaft and outer knife pipe, prevents interior knife tube assembly from retracting relative to outer knife pipe, is protected Card operation is gone on smoothly, and is assembled simply, and position limiting structure is firm.

Any person skilled in the art all can be under the spirit and scope without prejudice to the utility model, to above-described embodiment Carry out modifications and changes.Therefore, such as those of ordinary skill in the art without departing from disclosed in the utility model Spirit with technical idea under all equivalent modifications or change for being completed, should be contained by the claim of the utility model Lid.

Claims (10)

1. a kind of grinding knife tool with location structure, including bistrique, outer knife pipe, the interior knife pipe being coaxially disposed in outer knife pipe and Rigid shaft, the rigid shaft are connected between interior knife pipe and bistrique and transmit torque, it is characterised in that: the rigidity It is provided between transmission shaft and outer knife pipe for the location structure to rigid shaft radial centering.

2. the grinding knife tool according to claim 1 with location structure, it is characterised in that: the location structure is coaxially The positioning sleeve being sheathed on rigid shaft.

3. the grinding knife tool according to claim 2 with location structure, it is characterised in that: the rigid shaft is ladder Axis, major diameter section connect with bistrique and transmit torque, and path section is fixedly connected with interior knife pipe；The positioning sleeve is on axial position Between interior knife pipe and the shaft shoulder.

4. the grinding knife tool according to claim 3 with location structure, it is characterised in that: the path of the rigid shaft Interior knife pipe is inserted at section rear portion, and is welded with interior knife pipe.

5. the grinding knife tool according to claim 1 with location structure, it is characterised in that: the rigid shaft and outer knife The position limiting structure for preventing rigid shaft from axially retracting relative to outer knife pipe is provided between pipe.

6. the grinding knife tool with location structure described in -5 any one according to claim 1, it is characterised in that: the grinding cutter Tool is reversible grinding knife tool, is had for driving the bending of bistrique pitching motion to adjust component.

7. the grinding knife tool according to claim 6 with location structure, it is characterised in that: the outer knife pipe front end rotation connects It is connected to installation sheath, outer knife pipe rear portion adjusts component with bending and connect, and it is intrathecal that the bistrique is located at the installation, bistrique tail end and rigidity The rotation connection of transmission shaft front end.

8. the grinding knife tool according to claim 7 with location structure, it is characterised in that: the bistrique circumferentially offers Locating slot is symmetrical arranged on the installation sheath there are two locating piece, and the locating piece protrudes into locating slot to bistrique axially position.

9. the grinding knife tool according to claim 6 with location structure, it is characterised in that: the interior knife pipe and outer knife pipe it Between be coaxially equipped with wearing bush, which covers on interior knife pipe.

10. the grinding knife tool with location structure described in -5 any one according to claim 1, it is characterised in that: the bistrique It is fixedly connected or is integrally formed with rigid shaft, interior knife pipe is inserted at the rigid shaft rear portion, and is fixed with interior knife pipe.