CN119845476A - Screw imbedding torque measuring device - Google Patents

Abstract

The invention provides a screw insertion torque measuring device, and belongs to the field of medical equipment. The screw head centering device comprises a handheld end, wherein the handheld end comprises a handle, a torque measuring part fixedly connected to one end of the handle and a driving part fixedly connected to one end of the torque measuring part, the other end of the driving part is fixedly connected with a stable deviation preventing component, the stable deviation preventing component comprises a connecting rod fixedly connected to the other end of the driving part, a limiting part sleeved outside the connecting rod and a sleeve part rotationally connected to the outside of the limiting part, by arranging the centering component, the driving part and a screw head of a pedicle screw are ensured to be accurately centered, torque loss caused by angle deviation can be effectively avoided, the driving part can more directly and uniformly transmit the torque to the pedicle screw, the applied force is ensured to be completely acted on the screw, errors are reduced, the accuracy of torque measurement is improved, the applied torque can be completely acted on the screw, and mechanical loss caused by the angle deviation is reduced.

Description

Screw imbedding torque measuring device

Technical Field

The invention relates to the field of medical equipment, in particular to a screw insertion torque measuring device.

Background

In the spine operation, the torque value when the screw is placed comes from the contact force of the screw and a bone interface, the torque of the screw is judged in real time, and the method has important significance for judging whether the screw is stable or not.

In order to measure the torque of a screw placed in a bone and judge the stability of the screw placement, the prior art CN117643496A discloses a thoracolumbar spine nailing device which is connected with a torque measuring part at one end of a holding assembly, and can measure the real-time torque in the screwing process, so that a user can know the hardness, the compactness and other information of the bone of a patient by measuring the real-time torque.

Although the screw imbedding device in the prior art can realize real-time measurement of torque, before imbedding the pedicle screw into a bone, a driving head of the screw imbedding device is required to be aligned with a driving groove of the pedicle screw, and then the pedicle screw is driven to rotate and imbedded into the bone by manually screwing the screw imbedding device, if the contact angle between the driving head of the screw imbedding device and the pedicle screw is not completely centered in the process, the torque application direction can be offset, the angle deviation can occur, so that uneven torque transmission is caused, the accuracy of measured values is influenced, and the stability of the actual screw and the judgment of the bone condition of a patient are influenced.

Disclosure of Invention

Aiming at the problems that in the prior art, a manual screwing nail placing device drives a pedicle screw to rotate and place in a bone, if the contact angle between a driving head of the nail placing device and the pedicle screw is not completely centered, the torque application direction can be offset, and the angle deviation occurs, so that the torque transmission is uneven, the invention aims to provide a screw placement torque measuring device.

In order to solve the problems, the invention adopts the following technical scheme:

the screw-in torque measuring device comprises a handheld end, wherein the handheld end comprises a grip, a torque measuring part fixedly connected to one end of the grip and a driving part fixedly connected to one end of the torque measuring part;

The other end of the driving part is fixedly connected with a stable deviation prevention component, and the stable deviation prevention component comprises a connecting rod fixedly connected to the other end of the driving part, a limiting part sleeved outside the connecting rod, a sleeve part rotationally connected to the outside of the limiting part and a centering component connected to one side of the sleeve part;

The centering assembly comprises four seats connected to the lower end of the sleeve, four clamping parts respectively connected to one side of the four seats in a rotating mode, a plurality of pawls fixedly connected to the outer surfaces of the four clamping parts, four rotating rods respectively connected to the inner parts of the four seats in a rotating mode, limiting claws fixedly connected to the outer parts of the rotating rods and used for limiting the pawls, four knob parts respectively connected to the outer surfaces of one side of the four seats in a rotating mode, and the four knob parts are fixedly connected with the four rotating rods respectively.

Optionally, the four clamping parts are respectively connected to one side of the four seat bodies in a rotating way through four torsion springs.

Optionally, a plurality of draw-in grooves have been seted up to the connecting rod outside, spacing portion includes that the movable sleeve establishes at the outside bearing inner race of connecting rod, set up the movable seat in the inside movable groove of bearing inner race, swing joint is in movable seat one, integrated into one piece is used for inserting the draw-in groove and spacing joint portion to the connecting rod in movable seat one side, one end inserts and establishes in movable seat inside and the guide pillar one of the other end rigid coupling on movable groove one inner wall, the spring one of cover is established in guide pillar one outside, set up at the inside shift chute of movable seat, swing joint is in the bearing inner race and be used for driving the shift assembly that movable seat removed, and the both ends of spring one link to each other with movable groove one inner wall and movable seat one side respectively.

Optionally, the shifting assembly comprises a plurality of second guide posts movably inserted in the bearing inner ring, a second spring sleeved outside the second guide posts, a pressing plate fixedly connected to one end of the second guide posts, and an extending part integrally formed on one side of the pressing plate, wherein the extending part penetrates through the bearing inner ring and enters the shifting chute, an inclined plane matched with the shifting chute is formed on one side of the extending part, and two ends of the second spring are respectively connected with the pressing plate and one side of the bearing inner ring.

Optionally, the external member includes two rings from top to bottom and the cover body that links to each other two rings, and the internal portion of cover still is connected with compresses tightly adjustment portion, and compresses tightly adjustment portion including rotating the bearing outer lane that connects outside and lie in the external member at the bearing inner circle, rigid coupling in the inside guide arm one of external member, screw rod one of spiro union in the external member, screw rod one spiro union is in the bearing outer lane, and the one end of screw rod one runs through the ring body and outwards extends, the outside at guide arm one is cup jointed in the activity of bearing outer lane.

Optionally, the outer part of the bearing inner ring is rotationally connected with the inner wall of the bearing outer ring.

Optionally, one of the ring bodies is provided with a third movable groove, the seat body is slidably connected in the third movable groove, a second screw rod is rotatably connected in the third movable groove, the seat body is in threaded connection with the outer part of the second screw rod, and one end of the second screw rod penetrates through the ring body and extends outwards.

Optionally, the clamping part is internally provided with a second movable groove, the second movable groove is movably connected with a second movable part, the inner wall of the second movable groove is fixedly connected with a second guide rod, the movable part is movably sleeved outside the second guide rod, one end of the movable part penetrates through the second movable groove and outwards extends to form an L-shaped extension end, the second guide rod is externally sleeved with a third spring, and two ends of the third spring are respectively connected with the inner wall of the second movable groove and the movable part.

Optionally, the outer surface of the torque measuring part is connected with a conductive slip ring, the stator part of the conductive slip ring is fixedly connected to the outer surface of the torque measuring part, the outer part of the torque measuring part is rotationally connected with a sleeve body, the rotor part of the conductive slip ring is fixedly connected to the inner wall of the sleeve body, and the outer surface of the sleeve body is fixedly connected with a display part which is in linear connection with the rotor part.

Optionally, the torque measuring part is further sleeved with a holding part, one side of the holding part is fixedly connected with a rod, one side of the sleeve body is fixedly connected with a sleeve rod, and the rod is movably inserted into the sleeve rod.

Compared with the prior art, the technical scheme provided by the invention has at least the following beneficial effects:

In the scheme, the tail cap of the pedicle screw can be clamped through the four clamping parts through the centering assembly, so that the driving part can be accurately centered with the screw head of the pedicle screw, torque loss caused by angle deviation can be effectively avoided, the driving part can more directly and uniformly transmit the torque to the pedicle screw, the applied force is ensured to completely act on the screw, errors are reduced, the accuracy of torque measurement is improved, the applied torque can be enabled to completely act on the screw, mechanical loss caused by the angle deviation is reduced, the torque transmission efficiency of the screwdriver is improved, the torque required in the screw installation process can be ensured to be completely effective, the operation accuracy is ensured, the screw is protected, the service life of the screw is prolonged, and extra damage or implantation failure is avoided.

Through being provided with spacing portion, can carry out spacingly to the connecting rod through spring one, movable seat and joint portion, make the connecting rod only can be towards the unidirectional motion of pedicle of vertebral arch screw's direction, ensure that the one end of connecting rod is hugged closely all the time and is rotated in the screw inner drive groove, ensure that all applied forces are all direct to rotate the screw, and can not waste in unnecessary direction, also can avoid simultaneously the connecting rod to appear when the moment of torsion is great from the circumstances of jumping out in the screw inner drive groove, reduce moment of torsion measuring error and the operation interruption because the connecting rod jump groove leads to.

Through being provided with the regulation portion that compresses tightly, through rotating screw rod one, make bearing outer lane, bearing inner race and transfer line remove to the direction of pedicle screw, reduce the distance between transfer line tip and the interior drive slot inner wall of screw, make transfer line tip and the interior drive slot inner wall of screw hug closely, reduce transfer line and screw contact unstability and produce the moment of torsion that dynamic fluctuation caused, avoided the moment of torsion loss that leads to because of the space. Therefore, the torque of each unit can be ensured to be effectively acted on the screw, the torque transmission efficiency is improved, meanwhile, the force can be more uniformly distributed on the whole contact area, the concentration of the force on a certain point or a certain small area is effectively avoided, the local stress concentration is reduced, the damage to the screw or a tool is prevented, the torque transmission is more direct and uniform, the torque sensor can more accurately sense the torque change of each unit through the uniformly distributed contact pressure, and the measurement error caused by the non-uniform force distribution is reduced. This helps to improve the stability and accuracy of the torque measurement, making the measurement more reliable.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the invention and to enable a person skilled in the pertinent art to make and use the invention.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic diagram of a stable anti-deviation assembly according to the present invention;

FIG. 3 is a schematic diagram of the structure of the third movable groove and the second screw;

FIG. 4 is a schematic view of the structure of the limiting part and the cover of the present invention;

FIG. 5 is a cross-sectional view of the bearing inner race of the present invention;

FIG. 6 is a schematic view of the structure of the guide rod I, ring body and bearing outer ring of the present invention;

FIG. 7 is a cross-sectional view of the clamping portion and the movable portion of the present invention;

FIG. 8 is an enlarged schematic view of the structure A in FIG. 7 according to the present invention;

FIG. 9 is a cross-sectional view of a housing of the present invention;

FIG. 10 is an enlarged schematic view of the structure of FIG. 9B according to the present invention;

fig. 11 is a schematic structural view of the conductive slip ring of the present invention.

[ Reference numerals ]

1. The hand-held end, 11, the handle, 12, the torque measuring part, 13, the driving part, 14, the conductive slip ring, 15, the sleeve body, 16, the display part, 17, the sleeve rod, 18, the inserting rod, 19, the holding part, 2, the stable deviation preventing component, 21, the connecting rod, 211, the clamping groove, 22, the limiting part, 221, the bearing inner ring, 222, the movable groove I, 223, the movable seat, 2231, the shifting chute, 224, the clamping part, 225, the guide post I, 226, the spring I, 227, the pressing plate, 2271, the extension part, 228, the guide post II, 229, the spring II, 23, the compression adjusting part, 231, the screw rod I, 232, the cover body, 233, the guide rod I, 234, the bearing outer ring, 235, the ring body, 24, the centering component, 241, the seat body, 242, the clamping part, 2421, the movable groove II, 243, the knob part, 244, the rotating rod, 245, the limiting claw 246, the pawl, 247, 248, the guide rod, the movable seat 249, the second, 250, the spring III, 25, the sleeve member, 251, the movable groove II, the sleeve body, 252, the guide rod II, 252, the sleeve body, and 252.

Specific structures and devices are labeled in the drawings to enable clear implementation of embodiments of the invention, but this is merely illustrative and is not intended to limit the invention to the specific structures, devices and environments that may be modified or adapted by those of ordinary skill in the art, based on the specific needs.

Detailed Description

The invention will now be described in detail with reference to the drawings and to specific embodiments. While the invention has been described herein in detail in order to make the embodiments more detailed, the following embodiments are preferred and can be embodied in other forms as well known to those skilled in the art, and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the invention to the specific forms disclosed herein.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.

It is to be understood that the meaning of "on," "above," "over" and "above" in the present invention should be read in the broadest manner so that "on" means not only "directly on" but also includes "on" something with intervening features or layers therebetween, and "on" or "above" means not only "on" or "over" but also may include the meaning of "on" or "over" it without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under," "below," "lower," "above," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

As shown in fig. 1 to 11, an embodiment of the present invention provides a screw-in torque measuring device, which includes a hand-held end 1, wherein the hand-held end 1 includes a grip 11, a torque measuring portion 12 fixedly connected to one end of the grip 11, and a driving portion 13 fixedly connected to one end of the torque measuring portion 12.

The other end of the driving part 13 is fixedly connected with a stable deviation prevention component 2, and the stable deviation prevention component 2 comprises a connecting rod 21 fixedly connected to the other end of the driving part 13, a limiting part 22 sleeved outside the connecting rod 21, a sleeve 25 rotatably connected to the outside of the limiting part 22, and a centering component 24 connected to one side of the sleeve 25.

The centering assembly 24 comprises four base bodies 241 connected to the lower end of the sleeve 25, four clamping portions 242 respectively rotatably connected to one side of the four base bodies 241, a plurality of pawls 246 fixedly connected to the outer surfaces of the four clamping portions 242, four rotating rods 244 respectively rotatably connected to the inside of the four base bodies 241, limiting pawls 245 fixedly connected to the outside of the rotating rods 244 and used for limiting the pawls 246, four knob portions 243 respectively rotatably connected to the outer surfaces of one side of the four base bodies 241, and the four knob portions 243 are fixedly connected with the four rotating rods 244.

The four clamping portions 242 are rotatably connected to one side of the four seat bodies 241 by four torsion springs 247, respectively.

By adopting the technical scheme, the tail cap of the pedicle screw is placed under the sleeve 25, then the clamping parts 242 are rotated, the free ends of the clamping parts 242 rotate towards the tail cap, the pawl 246 can be limited due to the design of the limiting claw 245, so that the free ends of the clamping parts 242 can only rotate unidirectionally towards the tail cap of the pedicle screw, the clamping parts 242 can clamp the tail cap of the pedicle screw, the clamping parts 242 clamp the tail cap of the pedicle screw, the centering assembly 24, the limiting parts 22 and the sleeve 25 are positioned on the tail cap of the pedicle screw at the moment, then the handle 11 is held by hand, the torque measuring part 12 and the driving part 13 move towards the tail cap of the pedicle screw through the handle 11, the connecting rod 21 fixedly connected with one end of the driving part 13 penetrates out of the limiting part 22 and is inserted into the tail cap of the pedicle screw, as shown in fig. 3, a hexagonal driving head at one end of the connecting rod 21 can be inserted into an inner hexagon of a pedicle screw (a cross hole and a cross driving head can be adopted to be matched, and the matching mode can be a plurality of matching modes in the prior art, which are not limited in the prior art), the handle 11 is rotated to drive the torque measuring part 12, the driving part 13 and the connecting rod 21 to rotate, the connecting rod 21 rotates to drive the pedicle screw to rotate, thereby placing the pedicle screw into a bone, in the process, the torque measuring part 12 can measure the torque generated in the rotation process of the pedicle screw, the torque measuring part 12 is the mature prior art, the principle is the same as that of a digital display torque screwdriver, and a torque sensor (a core component of the torque screwdriver is used for sensing the applied torque value, the sensor converts a torque signal into an electric signal) is used for measuring the torque, the screw driver comprises a power supply (usually a built-in rechargeable battery or a replaceable battery for providing power for the electronic part of the torque driver), a microprocessor (responsible for processing signals from the torque sensor and transmitting the processed data to a display screen, and can also perform other functions such as storage, alarm, peak hold and the like), and the like.

The tail cap of the pedicle screw can be clamped by the clamping part 242, so that the driving part 13 can be accurately centered with the screw head of the pedicle screw, torque loss caused by angle deviation can be effectively avoided, the driving part 13 can more directly and uniformly transmit torque to the pedicle screw, the applied force can be ensured to be completely acted on the screw, errors are reduced, the accuracy of torque measurement is improved, the applied torque can be completely acted on the screw, mechanical loss caused by the angle deviation is reduced, the torque transmission efficiency of the screwdriver is improved, the torque required in the screw installation process can be ensured to be completely effective, the operation accuracy is ensured, meanwhile, the damage caused by uneven contact surfaces of the driving part 13 and a driving groove in the screw head can be reduced, the screw is protected, the service life is prolonged, additional damage or implantation failure is avoided, the rotation of the rotating rod 244 can be driven by the rotating knob part 243, the limiting claw 245 can be driven to rotate when the rotating rod 244, the limiting claw 245 is separated from the pawl 246, the limiting claw 246 can be canceled, the limiting claw 246 and the clamping part 242 can be canceled, and the clamping part 242 can be rotated towards the opposite pedicle screw 247 after the clamping part 246 and the clamping part 242 is canceled, and the clamping part 247 can be turned towards the free end of the clamping part 247.

As shown in fig. 4 and 5, the outer portion of the connecting rod 21 is provided with a plurality of clamping grooves 211, the limiting portion 22 comprises a bearing inner ring 221 movably sleeved outside the connecting rod 21, a movable groove one 222 arranged inside the bearing inner ring 221, a movable seat 223 movably connected in the movable groove one 222, a clamping portion 224 integrally formed at one side of the movable seat 223 and used for being inserted into the clamping grooves 211 and limiting the connecting rod 21, a guide post one 225 with one end inserted inside the movable seat 223 and the other end fixedly connected to the inner wall of the movable groove one 222, a spring one 226 sleeved outside the guide post one 225, a shifting chute 2231 arranged inside the movable seat 223, and a shifting assembly movably connected in the bearing inner ring 221 and used for driving the movable seat 223 to move, wherein two ends of the spring one 226 are respectively connected with the inner wall of the movable groove one 222 and one side of the movable seat 223.

The displacement assembly comprises a plurality of second guide posts 228 movably inserted into the bearing inner ring 221, a second spring 229 sleeved outside the second guide posts 228, a pressing plate 227 fixedly connected to one end of the second guide posts 228, and an extending portion 2271 integrally formed on one side of the pressing plate 227, wherein the extending portion 2271 penetrates through the bearing inner ring 221 and enters the displacement chute 2231, an inclined surface matched with the displacement chute 2231 is formed on one side of the extending portion 2271, and two ends of the second spring 229 are respectively connected with the pressing plate 227 and one side of the bearing inner ring 221.

By adopting the technical scheme, when the torque measuring part 12 and the driving part 13 are moved towards the tail cap direction of the pedicle screw through the handle 11, the connecting rod 21 moves in the bearing inner ring 221, in the moving process, the first spring 226 pushes the movable seat 223 to move, the clamping part 224 enters the clamping groove 211, as one side of the clamping part 224 is inclined, the inner wall of the clamping groove 211 contacts with one side of the inclined surface of the clamping part 224 when the connecting rod 21 moves, so that the clamping part 224 is pushed out of the clamping groove 211, the connecting rod 21 can only move unidirectionally towards the pedicle screw, the first spring 226 and the clamping part 224 can limit the connecting rod 21, the connecting rod 21 cannot move in the direction deviating from the pedicle screw, one end of the connecting rod 21 is ensured to be always clung to rotate in the hexagon in the screw, all applied forces are ensured to be directly used for rotating the screw, the situation that the connecting rod 21 is out of the hexagon in the unnecessary direction is avoided, and the condition that the jump-out of the hexagon driving head at one end of the connecting rod 21 is caused by the jump-out of the hexagon in the screw in the hexagon in the unnecessary direction is avoided at the same time, and the measuring torque errors and the operation of the jump-out torque of the connecting rod 21 are reduced; after the measurement is completed, the pressing plate 227 is pressed, the pressing plate 227 descends and presses the second spring 229, the extending portion 2271 can enter the shifting chute 2231, the inclined surface on one side of the extending portion 2271 contacts with the inclined surface in the shifting chute 2231, so that the movable seat 223 is pushed to move in the first movable groove 222 towards the first spring 226, the clamping portion 224 can be moved out of the clamping groove 211, and therefore limiting of the connecting rod 21 can be omitted, and the connecting rod 21 can move away from the pedicle screw.

As shown in fig. 4 and 6, the sleeve 25 includes an upper ring 235, a lower ring 235, and a cover 232 connecting the two rings 235, and the inside of the sleeve 15 is further connected with a compression adjustment part 23, and the compression adjustment part 23 includes a bearing outer ring 234 rotatably connected to the outside of the bearing inner ring 221 and located in the sleeve 25, a guide rod one 233 fixedly connected to the inside of the sleeve 25, and a screw one 231 screwed to the inside of the sleeve 25, the screw one 231 is screwed into the bearing outer ring 234, and one end of the screw one 231 penetrates through the upper ring 235 and extends outwards, and the bearing outer ring 234 is movably sleeved to the outside of the guide rod one 233.

The outer portion of the bearing inner race 221 is rotatably coupled to the inner wall of the bearing outer race 234.

Through adopting above-mentioned technical scheme, although joint portion 224 can carry out spacingly to connecting rod 21, but the hexagonal drive head of connecting rod 21 one end still can exist the clearance when inserting in the screw hexagon, in order to avoid the moment of torsion loss because of the space causes, can drive bearing outer lane 234 and bearing inner race 221 through rotating lead screw one 231 and remove, when bearing outer lane 234 and bearing inner race 221 move towards the pedicle screw, because the inside joint portion 224 of bearing inner race 221 is spacing to connecting rod 21, therefore the joint portion 224 of bearing inner race 221 can drive connecting rod 21 and also move towards the pedicle screw direction, make connecting rod 21 hexagon drive head can hug closely in the screw hexagon, reduce the distance between connecting rod 21 hexagon drive head and the screw hexagon inner wall, reduce connecting rod 21 hexagon drive head and the unstable moment of torsion that produces dynamic fluctuation because of the contact of screw hexagon inner wall unstable, avoid the moment of torsion loss because of the space causes. Therefore, the torque of each unit can be ensured to be effectively acted on the screw, the torque transmission efficiency is improved, meanwhile, the force can be more uniformly distributed on the whole contact area, the concentration of the force on a certain point or a certain small area is effectively avoided, the local stress concentration is reduced, the damage to the screw or a tool is prevented, the torque transmission is more direct and uniform, the torque sensor can more accurately sense the torque change of each unit through the uniformly distributed contact pressure, and the measurement error caused by the non-uniform force distribution is reduced. This helps to improve the stability and accuracy of the torque measurement, making the measurement more reliable.

As shown in fig. 3, 7 and 8, a third movable groove 251 is formed on one side of the ring 235, the base 241 is slidably connected in the third movable groove 251, a second screw rod 252 is rotatably connected in the third movable groove 251, the base 241 is screwed on the outside of the second screw rod 252, and one end of the second screw rod 252 penetrates through the ring 235 and extends outwards.

The clamping part 242 is internally provided with a second movable groove 2421, the second movable groove 2421 is movably connected with a movable part 248, the inner wall of the second movable groove 2421 is fixedly connected with a second guide rod 249, the movable part 248 is movably sleeved outside the second guide rod 249, one end of the movable part 248 penetrates through the second movable groove 2421 and extends outwards to form an L-shaped extending end, the outer part of the second guide rod 249 is sleeved with a third spring 250, and two ends of the third spring 250 are respectively connected with the inner wall of the second movable groove 2421 and the movable part 248.

Through adopting above-mentioned technical scheme, can drive pedestal 241 and remove in movable groove three 251 inside through rotating lead screw two 252 to adjust the position of pedestal 241, when the position of pedestal 241 changes, the position of clamping part 242 also moves along with pedestal 241 and changes, the position of four clamping parts 242 is adjusted according to the size of pedicle screw tail cap in this way conveniently, can adapt to the pedicle screw tail cap of equidimension not, realize the centre gripping of pedicle screw tail cap of equidimension not, simultaneously movable part 248 can remove inside clamping part 242, can adjust the holistic length of clamping part 242 like this, make the L type extension end of movable part 248 bottom contact with the lower extreme of pedicle screw tail cap, realize the adaptability clamp to pedicle screw tail cap of equidimension not, also can improve the stability in the centre gripping of pedicle screw tail cap.

As shown in fig. 1 and 11, the outer surface of the torque measuring part 12 is connected with a conductive slip ring 14, a stator part of the conductive slip ring 14 is fixedly connected to the outer surface of the torque measuring part 12, the outer part of the torque measuring part 12 is rotatably connected with a sleeve body 15, a rotor part of the conductive slip ring 14 is fixedly connected to the inner wall of the sleeve body 15, and a display part 16 which is linearly connected with the rotor part is fixedly connected to the outer surface of the sleeve body 15.

The torque measuring part 12 is also sleeved with a holding part 19, one side of the holding part 19 is fixedly connected with a plug rod 18, one side of the sleeve body 15 is fixedly connected with a sleeve rod 17, and the plug rod 18 is movably inserted into the sleeve rod 17.

By adopting the above technical scheme, in order to conveniently read the real-time measurement value of the torque, the display part 16 of the application is not integrally designed with the torque measurement part 12, the display part 16 is fixed outside the sleeve body 15, and the signal transmission between the torque measurement part 12 and the display part 16 is realized through the conductive slip ring 14, in actual use, one hand holds the grip 11, the other hand holds the grip part 19, and when the grip 11 is rotated, the grip 11 drives the torque measurement part 12 to rotate inside the grip part 19, and because the grip part 19 is connected with the sleeve body 15 through the inserted rod 18 and the sleeve rod 17, the sleeve body 15 does not rotate as well as the grip part 19, so that when the torque measurement part 12 is rotated to measure the torque, the display side of the display part 16 can still face to a user, the display part 16 does not rotate along with the rotation of the torque measurement part 12, and the user can conveniently observe the torque measurement value in real time.

The working flow of the technical scheme provided by the invention is as follows:

The tail cap of the pedicle screw is placed below the sleeve 25, the second screw rod 252 is rotated to drive the base 241 to move in the third movable groove 251, the positions of the four clamping portions 242 are adjusted according to the size of the tail cap of the pedicle screw, then the movable portions 248 are grasped by hands, the movable portions 248 are pulled to extend the movable portions 248 in the clamping portions 242 outwards, the whole length of the clamping portions 242 is prolonged, the clamping portions 242 are rotated simultaneously, the free ends of the clamping portions 242 rotate towards the tail cap, the L-shaped extending ends of the bottoms of the movable portions 248 are contacted with the lower ends of the tail cap of the pedicle screw, and after the four clamping portions 242 finish the actions in sequence, the clamping and centering of the tail cap of the pedicle screw are completed.

Then hold the handle 11, remove torque measurement portion 12 and drive portion 13 to pedicle screw's tail cap direction through handle 11, drive portion 13 one end rigid coupling's connecting rod 21 wears out and inserts pedicle screw's tail cap from spacing portion 22, spacing portion 22's joint portion 224 can carry out spacingly to connecting rod 21, make connecting rod 21 can only carry out unidirectional movement to pedicle screw direction, after the hexagonal drive head of connecting rod 21 one end inserts in the interior hexagonal of screw, rotate lead screw one 231 again and drive bearing outer lane 234 and bearing inner lane 221 and remove, when bearing outer lane 234 and bearing inner lane 221 are to pedicle screw remove, because bearing inner lane 221 inside joint portion 224 carries out spacingly to connecting rod 21, consequently, bearing inner lane 221 joint portion 224 can drive connecting rod 21 also moves towards pedicle screw direction, make connecting rod 21 hexagonal drive head can hug closely in screw interior hexagonal, finally, still another hand holds handle 11, grasp portion 19, rotate handle 11 and drive connecting rod 21 through drive connecting rod 21 rotates, thereby place pedicle screw into bone.

In this process, the torque measuring part 12 can measure the torque generated in the rotation process of the pedicle screw, the measured value is transmitted to the display part 16 through the conductive slip ring 14, and the holding part 19 is connected with the sleeve body 15 through the inserting rod 18 and the sleeve rod 17, so that the sleeve body 15 does not rotate as the holding part 19, so that when the torque measuring part 12 is rotated to measure the torque, the display side of the display part 16 can still face the user, the display part 16 cannot rotate along with the rotation of the torque measuring part 12, and the user can conveniently observe the torque measured value in real time.

The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention. In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present invention.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (10)

1. The screw-in torque measuring device comprises a hand-held end and is characterized in that the hand-held end comprises a handle, a torque measuring part fixedly connected to one end of the handle and a driving part fixedly connected to one end of the torque measuring part;

The other end of the driving part is fixedly connected with a stable deviation prevention component, and the stable deviation prevention component comprises a connecting rod fixedly connected to the other end of the driving part, a limiting part sleeved outside the connecting rod, a sleeve part rotationally connected to the outside of the limiting part and a centering component connected to one side of the sleeve part;

The centering assembly comprises four seats connected to the lower end of the sleeve, four clamping parts respectively connected to one side of the four seats in a rotating mode, a plurality of pawls fixedly connected to the outer surfaces of the four clamping parts, four rotating rods respectively connected to the inner parts of the four seats in a rotating mode, limiting claws fixedly connected to the outer parts of the rotating rods and used for limiting the pawls, four knob parts respectively connected to the outer surfaces of one side of the four seats in a rotating mode, and the four knob parts are fixedly connected with the four rotating rods respectively.

2. The screw-in torque measuring device according to claim 1, wherein the four clamping portions are rotatably connected to one side of the four housings, respectively, by four torsion springs.

3. The screw-in torque measuring device according to claim 2, wherein the outer portion of the connecting rod is provided with a plurality of clamping grooves, the limiting portion comprises a bearing inner ring movably sleeved outside the connecting rod, a movable groove I arranged inside the bearing inner ring, a movable seat movably connected in the movable groove I, a clamping portion integrally formed on one side of the movable seat and used for being inserted into the clamping groove and limiting the connecting rod, a guide post I with one end inserted inside the movable seat and the other end fixedly connected to one inner wall of the movable groove I, a spring I sleeved outside the guide post I, a shifting chute arranged inside the movable seat, a shifting assembly movably connected in the bearing inner ring and used for driving the movable seat to move, and two ends of the spring I are respectively connected with one inner wall of the movable groove I and one side of the movable seat.

4. The screw-in torque measuring device according to claim 3, wherein the displacement assembly comprises a plurality of second guide posts movably inserted into the bearing inner ring, a second spring sleeved outside the second guide posts, a pressing plate fixedly connected to one end of the second guide posts, and an extension part integrally formed on one side of the pressing plate, wherein the extension part penetrates through the bearing inner ring and enters the displacement chute, an inclined surface matched with the displacement chute is formed on one side of the extension part, and two ends of the second spring are respectively connected with the pressing plate and one side of the bearing inner ring.

5. The screw-in torque measuring device according to claim 4, wherein the sleeve comprises an upper ring body, a lower ring body and a cover body connecting the two ring bodies, the inside of the sleeve body is further connected with a compression adjusting part, the compression adjusting part comprises a bearing outer ring rotatably connected to the outside of the bearing inner ring and located in the sleeve body, a guide rod I fixedly connected to the inside of the sleeve body, and a screw rod I screwed to the inside of the sleeve body, the screw rod I is screwed to the bearing outer ring, one end of the screw rod I penetrates through the upper ring body and extends outwards, and the bearing outer ring is movably sleeved on the outside of the guide rod I.

6. The screw-in torque measuring device of claim 5, wherein the outer portion of the bearing inner race is rotatably coupled to the inner wall of the bearing outer race.

7. The screw insertion torque measuring device according to claim 6, wherein one side of the ring body is provided with a third movable groove, the seat body is slidably connected in the third movable groove, a second screw rod is rotatably connected in the third movable groove, the seat body is in threaded connection with the outside of the second screw rod, and one end of the second screw rod penetrates through the ring body and extends outwards.

8. The screw-in torque measuring device according to claim 7, wherein a second movable groove is formed in the clamping portion, a movable portion is movably connected in the second movable groove, a guide rod second is fixedly connected to the inner wall of the second movable groove, the movable portion is movably sleeved outside the guide rod second, one end of the movable portion penetrates through the second movable groove and extends outwards to form an L-shaped extending end, a third spring is sleeved outside the guide rod second, and two ends of the third spring are respectively connected with the inner wall of the second movable groove and the movable portion.

9. The screw-in torque measuring device according to claim 8, wherein the outer surface of the torque measuring part is connected with a conductive slip ring, the stator part of the conductive slip ring is fixedly connected to the outer surface of the torque measuring part, the outer part of the torque measuring part is rotationally connected with a sleeve body, the rotor part of the conductive slip ring is fixedly connected to the inner wall of the sleeve body, and the outer surface of the sleeve body is fixedly connected with a display part which is linearly connected with the rotor part.

10. The screw-in torque measuring device according to claim 9, wherein the torque measuring part is further sleeved with a holding part, one side of the holding part is fixedly connected with a plug rod, one side of the sleeve body is fixedly connected with a sleeve rod, and the plug rod is movably inserted into the sleeve rod.