CN208864405U - Grinding knife tool with anti-rollback structure - Google Patents

Abstract

The utility model provides a kind of grinding knife tool of anti-rollback structure of band, including bistrique, interior knife tube assembly and outer knife pipe, the interior knife tube assembly coaxial arrangement is in outer knife pipe, the interior knife tube assembly front end is connect to transmit torque with bistrique, and the position limiting structure for preventing interior knife tube assembly from axially retracting relative to outer knife pipe is provided between the interior knife tube assembly and outer knife pipe.The utility model, the internal knife tube assembly of setting position limiting structure carry out axial limiting, and bistrique and interior knife tube assembly generate rollback when can prevent bistrique polishing bone tissue by resistance, guarantee that operation is normally carried out.

Description

Grinding knife tool with anti-rollback structure

Technical field

The utility model belongs to the field of medical instrument technology, and in particular to a kind of grinding knife tool of the anti-rollback structure of band.

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, transmission shaft is structure as a whole with bistrique.When due to the polishing of bistrique high speed rotation, bone group Resistance can be generated to bistrique by knitting, and bistrique and transmission shaft are easy to retract, and influenced operation and be normally carried out.

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, in polishing, bone tissue can make the resistance that bistrique generates Transmission shaft is obtained to retract.

Therefore, either reversible abrasive drilling still can not deflecting abrasive drilling, using rigid shaft transmit power when, all exist Transmission shaft, which is easy to retract, 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 anti-rollback structures of band Grinding knife tool prevents interior knife tube assembly in surgical procedure from retracting when rotated, guarantees going on smoothly for operation.

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 of the anti-rollback structure of band, including bistrique, interior knife tube assembly and outer knife pipe, the interior knife tube assembly In outer knife pipe, which is connect to transmit torque, the interior knife tube assembly and outer knife with bistrique for coaxial arrangement The position limiting structure for preventing interior knife tube assembly mobile relative to outer knife pipe axial direction rollback is provided between pipe.

Using the above structure, outer knife pipe is used to support and installs interior knife tube assembly, and position limiting structure is arranged in the utility model, right Interior knife tube assembly carries out axial limiting, and interior knife tube assembly generates rollback when can prevent bistrique polishing bone tissue by resistance, guarantees Operation is normally carried out.

Further, the position limiting structure is the limited ring groove and positive stop key matched, and the limited ring groove and positive stop key exist Corresponding on axial position, one of to be arranged in interior knife tube assembly, another is arranged on outer knife pipe.

By the cooperation of limited ring groove and positive stop key, opposite shifting axial between interior knife tube assembly and outer knife pipe can be prevented It is dynamic.

Further, the interior knife tube assembly includes interior knife pipe and rigid shaft, and the rigid shaft is connected to interior knife Between pipe and bistrique and torque is transmitted, the limited ring groove is provided on rigid shaft, and the locating part is arranged in outer knife pipe On.

Limited ring groove is arranged on rigid shaft, and process and assemble is convenient, and structure is more firm.

Further, the axial position on the outer knife pipe corresponding to limited ring groove offers the installation window being packed into for positive stop key Mouthful, the positive stop key passes through the installation window and protrudes into limited ring groove, and is fixed on outer knife pipe.The structure is convenient for positive stop key Installation fix.

Further, the positive stop key and outer knife pipe weld.

Further, the limited ring groove is axially disposed at least one, and the positive stop key is corresponding with limited ring groove.

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 adjusts component with bending and connect, institute Stating bistrique, to be located at the installation intrathecal, and bistrique tail end and rigid shaft front end are rotatablely connected, the rigid shaft rear portion insertion Interior knife pipe, and fixed with interior knife pipe.Component driver bistrique pitching motion is adjusted to realize deflecting by bending, is formed reversible Grinding knife tool.

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 progress axially position is being installed to bistrique by symmetrically arranged two locating pieces, is keeping it axially fixed Position is more stable.

Further, wearing bush has been coaxially disposed between the interior knife pipe and outer knife pipe.Setting wearing bush is rubbed with reducing, Fever is reduced, the materials such as polytetrafluoroethylene (PTFE) can be used and be made.

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 opposite can not be bent between bistrique and rigid shaft, and formation can not deflecting mill Cutting knife tool.

As described above, the beneficial effects of the utility model are: the utility model be arranged position limiting structure, internal knife tube assembly into Row axial limiting, interior knife tube assembly generates rollback when can prevent bistrique polishing bone tissue by resistance, guarantees that operation is gone on smoothly.

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

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.

Embodiment 1

Front and back position herein is with grinding knife tool use state for reference, and bistrique is preceding, and power source is in rear, the side of rollback To being the direction for being close to power source, that is, move backward.

Fig. 1 show a kind of schematic diagram of the grinding knife tool of anti-rollback function, including bistrique 3, interior knife tube assembly 2, outer knife Pipe 1 and the power sub 5 for connecting with power source etc., the interior coaxial arrangement of knife tube assembly 2 is in outer knife pipe 1, and energy is opposite It is rotated in outer knife pipe 1, which connect transmitting torque with bistrique 3, sets between interior knife tube assembly 2 and outer knife pipe 1 It is equipped with the position limiting structure for preventing interior knife tube assembly 2 from moving axially backward relative to outer knife pipe 1.Internal knife tube assembly 2 carries out Axial limiting, bistrique 3 and interior knife tube assembly 2 generate rollback when can prevent bistrique 3 from polishing bone tissue by resistance, are guaranteeing operation just Often carry out.

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, in one embodiment, limited ring groove 23 is arranged in interior knife tube assembly 2, Positive stop key 24 is arranged on outer knife pipe 1；Limited ring groove 23 is arranged on outer knife pipe 1 in another embodiment, and positive stop key 24 is set It sets in interior knife tube assembly 2.By the cooperation of limited ring groove 23 and positive stop key 24, can prevent interior knife tube assembly 2 and outer knife pipe 1 it Between axial relative movement, but be relatively rotatable to each other in the circumferential.

In this example, interior knife tube assembly 2 includes interior knife pipe 21 and rigid shaft 22,22 rear portion of rigid shaft and interior knife pipe 21 are fixedly connected, and 22 front end of rigid shaft connect with bistrique 3 and transmit torque, and limited ring groove 23 is provided with rigid shaft 22 On, positive stop key 24 is fixed on outer knife pipe 1.Limited ring groove 23 is arranged on rigid shaft 22, and process and assemble is convenient, and ties 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 outer profile Planarization and consistency, avoid interference with simultaneously.

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.

Further, bistrique 3 circumferentially offers locating slot 61, installs and is symmetrical arranged on sheath 4 there are two locating piece 62, is positioned Block 62 protrudes into locating slot 61 to 3 axially position of bistrique.By symmetrically arranged two locating pieces 62 to bistrique 3 in installation sheath 4 Interior position carries out axially position, more stable when making its rotation.Locating piece 62 has and the installation matched outer arcuate gabarit of sheath 4 Face, locating piece 62 can be fixed on by welding on installation sheath 4.

To reduce the friction between interior knife pipe 21 and outer knife pipe 1, fever is reduced.It is same between interior knife pipe 21 and outer knife pipe 1 It is provided with to axis wearing bush 7, wearing bush 7 is solidly set on outside interior knife pipe 21 in this example, and it is wear-resisting that polytetrafluoroethylene (PTFE) etc. can be used in wearing bush 7 Material is made.

Embodiment 2

As shown in Figure 6 and Figure 7, difference from example 1 is that, in this example anti-rollback structure be applied to can not deflecting Grinding knife tool, 3 rotations of bistrique are unable to pitch regulation.

Specifically, rigid shaft 22 is extended to form that (i.e. bistrique 3 and rigid shaft 22 are integral type by 3 rear end of bistrique Structure), bistrique 3 can also be fixedly connected with rigid shaft 22 in another embodiment.In the insertion of 22 rear portion of rigid shaft Knife pipe 21, and be welded and fixed with interior knife pipe 21.Limited ring groove 23 is equally provided on 22 periphery of rigid shaft, each limit It is correspondingly arranged a positive stop key 24 on 23 axial position of annular groove, or is symmetrical arranged two limits on 23 axial position of limited ring groove Position key 24, the installation form of positive stop key 24 are same as Example 1.

The utility model sets limited ring groove 23 and positive stop key 24 between rigid shaft 22 and outer knife pipe 1, prevents interior knife Tube assembly 2 retracts relative to outer knife pipe 1, guarantees going on smoothly for operation, and assembles 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 (9)

1. a kind of grinding knife tool of the anti-rollback structure of band, including bistrique, interior knife tube assembly and outer knife pipe, the interior knife tube assembly are same Axis is arranged in outer knife pipe, which connect to transmit torque with bistrique, it is characterised in that: the interior knife pipe group The position limiting structure for preventing interior knife tube assembly from axially retracting relative to outer knife pipe is provided between part and outer knife pipe；The limit Structure is the limited ring groove and positive stop key matched, and the interior knife tube assembly includes interior knife pipe and rigid shaft, the rigidity Transmission shaft is connected between interior knife pipe and bistrique and transmits torque, and the limited ring groove is provided on rigid shaft, the limit Position key is arranged on outer knife pipe.

2. the grinding knife tool of the anti-rollback structure of band according to claim 1, it is characterised in that: the limited ring groove and limit Key is corresponding on axial position, one of to be arranged in interior knife tube assembly, another is arranged on outer knife pipe.

3. the grinding knife tool of the anti-rollback structure of band according to claim 1, it is characterised in that: correspond on the outer knife pipe The axial position of limited ring groove offers the installation window being packed into for positive stop key, and the positive stop key passes through the installation window and protrudes into In limited ring groove, and it is fixed on outer knife pipe.

4. the grinding knife tool of the anti-rollback structure of band according to claim 3, it is characterised in that: the positive stop key and outer knife pipe Welding；The limited ring groove is axially disposed at least one, and the positive stop key is corresponding with limited ring groove.

5. the grinding knife tool of the anti-rollback structure of band according to claim 3 or 4, it is characterised in that: the grinding knife tool is Reversible grinding knife tool has for driving the bending of bistrique pitching motion to adjust component.

6. the grinding knife tool of the anti-rollback structure of band according to claim 5, it is characterised in that: the outer knife pipe front end rotation Be connected with 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 with it is rigid Property the rotation connection of transmission shaft front end, the rigid shaft rear portion be inserted into knife pipe, and fixed with interior knife pipe.

7. the grinding knife tool of the anti-rollback structure of band according to claim 6, it is characterised in that: the bistrique circumferentially opens up There is locating slot, is symmetrical arranged on the installation sheath there are two locating piece, the locating piece protrudes into axially fixed to bistrique in locating slot Position.

8. the grinding knife tool of the anti-rollback structure of band according to claim 4, it is characterised in that: the interior knife pipe and outer knife pipe Between be coaxially disposed wearing bush.

9. the grinding knife tool of the anti-rollback structure of band according to claim 3 or 4, it is characterised in that: the bistrique and rigidity Transmission shaft is fixedly connected or is integrally formed, and interior knife pipe is inserted at the rigid shaft rear portion, and is fixed with interior knife pipe.