CN217162175U

CN217162175U - Medical miniature fixed-torque screwdriver

Info

Publication number: CN217162175U
Application number: CN202220700343.9U
Authority: CN
Inventors: 岳二英
Original assignee: Shanghai Youbai Machinery Co ltd
Current assignee: Shanghai Youbai Machinery Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-08-12
Anticipated expiration: 2032-03-25

Abstract

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a moment of torsion screwdriver is decided to medical miniature is related to, including handle and hexagonal shaft, the hexagonal shaft is fixed in the handle and overlaps according to the preface admittedly in outer end tooth, inner end tooth, spring and pressure spring nut, outer end tooth with the terminal surface of inner end tooth is the ratchet meshing, the spout has been seted up on the handle inner wall, inner end tooth outer wall inlays to be established in the spout, inner end tooth outer wall is the slope setting, just the inner end tooth is close to outer end tooth's one end outer wall with spout inner wall butt, this application has the effect that improves the precision of medical miniature moment of torsion screwdriver of deciding.

Description

Medical miniature fixed-torque screwdriver

Technical Field

The application relates to the technical field of medical instruments, in particular to a medical miniature fixed-torque screwdriver.

Background

With the development of society, the frequency of a series of operations with higher precision, such as cardiac operations, is higher and higher, and the precision requirements of the operations on related operation tools are higher and higher, the traditional medical fixed-torque screwdriver comprises a hexagonal shaft and a handle, wherein the hexagonal shaft is fixed in the handle and is sequentially sleeved and fixed in outer end teeth, inner end teeth, a spring and a pressure spring nut, and when the handle is rotated in the using process, the inner end teeth are stressed, so that a friction force opposite to the movement direction can be generated on an A-A surface, the direction of the friction force is consistent with the spring force, and an error can be generated on the set screwdriver torque due to the existence of the friction force. On the large torque screwdriver, the error is very small relative to the set value, and the influence on the precision of the screwdriver is not large, and on the mini medical small torque screwdriver, the relative error is large because the set value is very small. To ensure the accuracy of the small torque setting, it is necessary to reduce the frictional force f.

SUMMERY OF THE UTILITY MODEL

In order to improve the precision of medical miniature fixed-torque screwdriver, the application provides a medical miniature fixed-torque screwdriver.

The application provides a medical miniature moment of torsion screwdriver adopts following technical scheme:

the utility model provides a medical miniature moment of torsion screwdriver, includes handle and hexagonal axle, and the hexagonal axle is fixed in the handle and overlaps according to the preface and admittedly in outer end tooth, inner end tooth, spring and pressure spring nut, outer end tooth with the terminal surface of inner end tooth is the ratchet meshing, the spout has been seted up on the handle inner wall, inner end tooth outer wall inlays to be established in the spout, inner end tooth outer wall is the slope setting, just the inner end tooth is close to the one end outer wall of outer end tooth with spout inner wall butt.

Through adopting above-mentioned technical scheme, during the use, the twist grip makes hexagonal axle and outer end tooth in the handle rotate along with the handle, during the rotation, pressure on the outer end tooth increases to certain value gradually, because outer end tooth and inner ratchet meshing, along with the pressure increase on the outer end tooth, the axial force that receives also corresponding increase on the inner end tooth, and then the extrusion spring, make the spring deformation produce the elastic force, when reaching the spring force of settlement, inner end tooth closely cooperates the locking with the outer end tooth and then guaranteed that medical screwdriver's torque output can not be too big, the stability when the inner tooth dropout has then been guaranteed to the spout, and then improved medical miniature moment of torsion screwdriver's precision.

Optionally, the inner end teeth face the side wall of the pressure spring nut, a first abutting groove is formed in the side wall of the pressure spring nut, the pressure spring nut faces the side wall of the inner end teeth, a second abutting groove is formed in the side wall of the inner end teeth, and the spring is located between the first abutting groove and the second abutting groove.

Through adopting above-mentioned technical scheme, support the spring tightly between the first butt groove of inner end tooth and the second butt groove of pressure spring nut, play the direction limiting displacement to the spring, reduced the spring compression deformation in-process take place to buckle etc. and warp and cause the atress change and then the possibility of the moment of torsion size.

Optionally, inner washers are disposed on the inner walls of the first abutting groove and the second abutting groove, and the spring is located between the two inner washers.

Through adopting above-mentioned technical scheme, with the spring mounting between two interior packing rings for the spring both ends and interior packing ring butt have reduced the frictional force that the spring both ends received, and then have reduced the influence of frictional force on the spring to the screwdriver moment of torsion.

Optionally, an outer spacer is disposed between the outer end teeth and the handle.

Through adopting above-mentioned technical scheme, outer gasket plays the effect that reduces friction between outer end tooth and handle, and then has reduced the influence of frictional resistance to the screwdriver output torque on the outer end tooth.

Optionally, a communicating opening is formed in one end, away from the outer end teeth, of the handle, and an end cover is detachably fixed in the communicating opening.

Through adopting above-mentioned technical scheme, offer intercommunication mouth and demountable installation end cover in the one end that the handle deviates from the outer end tooth, and then can realize being the change of each part in the handle, improved the life of screwdriver, practiced thrift the cost.

Optionally, the hexagonal shaft includes a fixing portion fixed in the handle and a tool bit portion detachably disposed at an end of the fixing portion away from the handle.

Through adopting above-mentioned technical scheme, be fixed part and sword head portion two parts with the hexagonal axle, medical personnel can realize the change to screwdriver head according to the demand of difference fast, and then has reduced the hexagonal axle and has changed the influence to whole screwdriver atress, has reduced the time of installation regulation, has also improved the adaptability of screwdriver simultaneously.

Optionally, the handle includes a holding portion and a fastening portion fixed at one end of the holding portion, the fastening portion is disposed in an arc shape at a joint with the holding portion, and the outer end teeth are located at one end of the fastening portion.

Through adopting above-mentioned technical scheme, the one end that is located outer end tooth at the handle sets up supports tight portion, and the hand is exerted oneself when the medical personnel of being convenient for use for the operation process is steady safety more.

Optionally, the outer wall of the handle is provided with a plurality of anti-slip grooves.

Through adopting above-mentioned technical scheme, the operation in-process, medical personnel twist reverse the possibility that the hand slippage might appear when the screwdriver, and then influence operation safety, have improved the frictional force between hand and handle through anti-skidding recess, and then have reduced the hand slippage and have caused dangerous possibility.

In summary, the present application includes at least one of the following beneficial technical effects:

1. during the use, the rotating handle makes hexagonal axle and outer end tooth in the handle rotate along with the handle, when rotating, the pressure on the outer end tooth increases to certain value gradually, because outer end tooth and inner end tooth ratchet meshing, along with the pressure increase on the outer end tooth, the axial force that receives also corresponding increase on the inner end tooth, and then the extrusion spring, make the spring warp and produce the elastic force, when reaching the spring force of settlement, the inner tooth will take place to drop off and then guaranteed that medical screwdriver's torque output can not be too big, the spout has then guaranteed the stability when inner tooth drops off, and then has improved medical miniature fixed torque screwdriver's precision.

2. The friction force between the parts of the screwdriver is reduced through the inner gasket and the outer gasket, and further the influence of the friction force between the parts on the accuracy of the torque screwdriver is reduced.

3. Through the tight portion of supporting on the handle and anti-skidding recess for medical personnel conveniently exert oneself when using, have reduced the possibility of hand slippage simultaneously, and then make the operation process steady safety more.

Drawings

Fig. 1 is a shaft measuring view mainly showing an overall structure of a medical miniature constant-torque screwdriver in an embodiment of the application.

Fig. 2 is a schematic full-section view of the internal structure of the screwdriver mainly embodying the constant torque in the embodiment of the present application.

Fig. 3 is an axial view mainly showing the structure of the outer end teeth and the inner end teeth in the embodiment of the present application.

Reference numerals: 1. a handle; 11. a grip portion; 12. a tightening part; 2. a hexagonal shaft; 21. a fixed part; 22. a cutter head portion; 3. a communication port; 4. an end cap; 5. mounting grooves; 6. a compression spring nut; 7. a second abutting groove; 8. positioning holes; 9. a chute; 10. inner end teeth; 13. a first abutting groove; 14. mounting holes; 15. an inner gasket; 16. caulking grooves; 17. an outer end tooth; 18. an outer gasket; 19. a spring; 20. a card slot; 23. clamping the column; 24. and (4) an anti-slip groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a medical miniature fixed-torque screwdriver.

Referring to fig. 1 and 2, a medical miniature torque-fixed screwdriver comprises a handle 1 and a hexagonal shaft 2, wherein an outer end tooth 17, an inner end tooth 10, a spring 19 and a pressure spring nut 6 are sequentially installed in the handle 1, the hexagonal shaft 2 is sequentially fixedly sleeved in the outer end tooth 17, the inner end tooth 10, the spring 19 and the pressure spring nut 6, and the hexagonal shaft 2 is further fixedly installed in the handle 1.

Referring to fig. 1 and 2, handle 1 includes portion of gripping 11 and supports tight portion 12, in this embodiment, handle 1 is cylindricly, support tight portion 12 integrated into one piece in the one end of portion of gripping 11, support tight portion 12 and the portion of gripping 11 handing-over department and be the arc setting, the portion of gripping 11 deviates from the one end of supporting tight portion 12 and has seted up

intercommunication mouth

3, 3 female connection in intercommunication mouth has end cover 4, the one end that end cover 4 deviates from supporting tight portion 12 flushes with the 11 terminal surfaces of portion of gripping, support tight portion 12 and be convenient for medical personnel to hold, support tight portion 12 then be convenient for medical personnel to rotate and have an effect.

Referring to fig. 2, end cover 4 stretches into the one end in the portion of gripping 11 and has seted up mounting groove 5, pressure spring nut 6 inlays and establishes in mounting groove 5, pressure spring nut 6 is towards the one end of abutting portion 12 and the coaxial second butt groove 7 of having seted up of the portion of gripping 11, the coaxial locating hole 8 of having seted up that runs through on the 7 bottom surfaces of second butt groove, pressure spring nut 6 and threaded connection are worn to establish to hexagonal shaft 2 one end that stretches into in the handle 1 in locating hole 8, and then realized hexagonal shaft 2 and pressure spring nut 6's fixed.

Referring to fig. 2 and 3, the holding portion 11 is located the one end inner wall of intercommunication mouth 3 and has still seted up spout 9, and slide between the one end that spout 9 deviates from end cover 4 and pressure spring nut 6 and install interior end tooth 10, and first butt groove 13 has been seted up with the handle 1 is coaxial towards the one end of pressure spring nut 6 to interior end tooth 10, and coaxial running through has seted up mounting hole 14 on the first butt groove 13 bottom surface, and mounting hole 14 is worn to establish by hexagonal shaft 2.

The outer wall of the inner end tooth 10 is obliquely arranged, one end, close to the abutting portion 12, of the inner end tooth 10 abuts against the inner wall of the sliding groove 9, the inner end tooth 10 obliquely arranged with the inner wall of the sliding groove 9 facilitates sliding of the inner end tooth 10, the possibility that sliding is difficult due to the fact that friction force between the outer wall of the inner end tooth 10 and the inner wall of the sliding groove 9 is large is reduced, and then the influence of friction resistance between the inner end tooth 10 and the sliding groove 9 on the torque of the screwdriver is reduced.

Referring to fig. 2, inner washers 15 are respectively abutted on the bottom surfaces of the first abutting groove 13 and the second abutting groove 7, the inner washers 15 are sleeved on the outer wall of the hexagonal shaft 2, a spring 19 is sleeved between the two inner washers 15 outside the hexagonal shaft 2, and the spring 19 is respectively abutted against the end surfaces of the two inner washers 15.

Referring to fig. 2 and 3, an end face, away from the holding portion 11, of the abutting portion 12 is coaxially provided with a caulking groove 16, outer end teeth 17 are rotatably embedded in the caulking groove 16 and are meshed with outer end teeth 17 through ratchets, the hexagonal shaft 2 is clamped and arranged in the outer end teeth 17 in a penetrating mode, torque is transmitted through ratchets between the outer end teeth 17 and inner end teeth 10 in a matching mode, when the rising angle of the inner side of a ratchet spiral surface is ensured to be within a proper range, friction and abrasion when the torque is transmitted between the outer end teeth 17 and the inner end teeth 10 can be avoided as far as possible, and therefore the accuracy of the torque screwdriver is improved.

Referring to fig. 2, a plurality of outer gaskets 18 are clamped and fixed between the end face of the outer end tooth 17 and the bottom wall of the caulking groove 16, in the embodiment, two outer gaskets 18 are installed, friction force generated between the outer end tooth 17 and the inner wall of the caulking groove 16 of the abutting portion 12 is reduced through the outer gaskets 18, and then influence of the friction force on the outer end tooth 17 on the output torque of the screw driver is reduced.

Referring to fig. 2, hexagonal shaft 2 includes fixed part 21 and tool bit portion 22, fixed part 21 overlaps in proper order and fixes at outer end tooth 17, inner end tooth 10, in spring 19 and the pressure spring nut 6, tight portion 12 is worn out to support by fixed part 21 one end, fixed part 21 wears out the one end of supporting tight portion 12 and has seted up draw-in groove 20, tool bit portion 22 has card post 23 towards the one end integrated into one piece of fixed part 21, card post 23 joint is in draw-in groove 20, and adopt interference fit with draw-in groove 20, joint complex hexagonal shaft 2 has improved the adaptability of screwdriver, the possibility that needs too much debugging when having reduced the reinstallation simultaneously, the convenience of screwdriver has been improved.

Referring to fig. 1, a plurality of anti-slip grooves 24 are uniformly formed in the outer wall of the holding part 11 at intervals along the axial direction of the holding part 11, and through the anti-slip grooves 24, the possibility that the hand of a medical worker slips when twisting the screwdriver is reduced, so that the safety of an operation is improved.

The implementation principle of the medical miniature fixed-torque screwdriver in the embodiment of the application is as follows: when the medical miniature fixed-torque screwdriver is used, a medical worker holds the holding part 11 and rotates the handle 1, the hexagonal shaft 2 in the screwdriver rotates along with the handle 1, so that the outer end teeth 17 are driven to rotate, the outer end teeth 17 are meshed with the inner end teeth 10 through ratchets, the spring 19 deforms to a fixed elastic pressure value, finally, the torque value of the screwdriver is located at a fixed torque value through locking and fixing between the outer end teeth 17 and the inner end teeth 10, and the precision of the medical miniature fixed-torque screwdriver is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a moment of torsion screwdriver is decided in medical miniature, includes handle (1) and hexagonal axle (2), and hexagonal axle (2) are fixed in handle (1) and are overlapped admittedly in outer end tooth (17), inner end tooth (10), spring (19) and pressure spring nut (6) according to the preface, its characterized in that: the end face of the outer end tooth (17) and the end face of the inner end tooth (10) are meshed through a ratchet, a sliding groove (9) is formed in the inner wall of the handle (1), the outer wall of the inner end tooth (10) is embedded in the sliding groove (9), the outer wall of the inner end tooth (10) is obliquely arranged, and the inner end tooth (10) is close to the outer wall of one end of the outer end tooth (17) and is abutted to the inner wall of the sliding groove (9).

2. The medical miniature fixed-torque screwdriver as claimed in claim 1, wherein: interior end tooth (10) orientation first butt groove (13) have been seted up on the lateral wall of pressure spring nut (6), pressure spring nut (6) orientation second butt groove (7) have been seted up on the lateral wall of interior end tooth (10), spring (19) are located first butt groove (13) with between second butt groove (7).

3. The medical miniature fixed-torque screwdriver as claimed in claim 2, wherein: the inner walls of the first abutting groove (13) and the second abutting groove (7) which are opposite to each other are provided with inner gaskets (15), and the spring (19) is located between the two inner gaskets (15).

4. The medical miniature fixed-torque screwdriver as claimed in claim 1, wherein: an outer gasket (18) is arranged between the outer end teeth (17) and the handle (1).

5. The medical miniature fixed-torque screwdriver as claimed in claim 1, wherein: the handle (1) deviates from one end of the outer end tooth (17) and is provided with a communication port (3), and an end cover (4) is detachably fixed in the communication port (3).

6. The medical miniature fixed-torque screwdriver as claimed in claim 1, wherein: the hexagonal shaft (2) comprises a fixing part (21) fixedly sleeved in the handle (1) and a cutter head part (22) detachably arranged at one end, deviating from the handle (1), of the fixing part (21).

7. The medical miniature fixed-torque screwdriver as claimed in claim 1, wherein: the handle (1) comprises a holding part (11) and a tight abutting part (12) fixed at one end of the holding part (11), the joint of the tight abutting part (12) and the holding part (11) is arranged in an arc shape, and the outer end teeth (17) are located at one end of the tight abutting part (12).

8. The medical miniature fixed-torque screwdriver as claimed in claim 1, wherein: the outer wall of the handle (1) is provided with a plurality of anti-slip grooves (24).