Adjustable torque device and method of using the same

Abstract

The present invention provides an adjustable torque device and a method of using the same, including a torque adjustment mechanism, a torque output mechanism and an anti-backlash mechanism. The torque adjustment mechanism includes an adjustment component, a first elastic member, a clutch gear and a fixed gear. The first elastic member is arranged between the adjustment component and the clutch gear. The adjustment component is used to adjust the deformation of the first elastic member. The first elastic member is used to generate torque. The clutch gear is used to transmit the torque generated by the first elastic member to the fixed gear. The torque output mechanism includes a shell and an actuator component. The actuator component includes a main shaft. One end of the main shaft extends into the shell. The clutch gear is slidably connected along the axial direction of the shell. The main shaft is fixedly connected to the fixed gear. The anti-backlash mechanism is arranged in the shell, and is used to maintain the adjustment position of the adjustment component. It can maintain the adjustment position of the adjustment component and prevent the position change of the adjustment component after adjustment from affecting the adjustment torque value.

Description

Technical Field

[0001] The present invention belongs to the technical field of orthopedic medical devices, and in particular relates to an adjustable torque device and a use method thereof. Background Art

[0002] Common biological screw installation tools with torque limits only have a locked torque value. The upper limit of the torque value during use can only be limited to the torque value set when the product leaves the factory. The upper limit of the torque value is a fixed value and cannot be adjusted according to needs during use. In actual surgical operations, different biological screws require different torque values ​​when installed. In order to avoid frequent replacement of installation tools due to different torque requirements, which will delay the operation time, a safe and convenient adjustable torque device is needed. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an adjustable torque device and a method for using the same, which solves the problem in the prior art that the torque value of the torque handle cannot be adjusted and the surgical operation is inconvenient.

[0004] The present invention provides an adjustable torque device, comprising:

[0005] The torque adjustment mechanism comprises an adjustment component, a first elastic member, a clutch gear and a fixed gear, wherein the first elastic member is arranged between the adjustment component and the clutch gear, the adjustment component is used to adjust the deformation of the first elastic member, the first elastic member is used to generate torque, and the clutch gear is used to transmit the torque generated by the first elastic member to the fixed gear;

[0006] The torque output mechanism comprises a housing and an actuator assembly, wherein the actuator assembly comprises a main shaft, one end of the main shaft extends into the housing, the clutch gear is slidably connected along the axial direction of the housing, and the main shaft is fixedly connected to the fixed gear;

[0007] An anti-retraction mechanism is disposed in the housing and is used to maintain the adjustment position of the adjustment component.

[0008] The above technical solution is preferred, wherein the adjusting assembly includes an adjusting nut and an adjusting rod, one end of the adjusting rod extends into the shell, the other end of the adjusting rod extends out of the shell from a direction away from the main shaft, the other end of the adjusting rod is connected to the adjusting nut, the adjusting nut is clearance-matched with the shell, and the first elastic member is arranged between the adjusting rod and the clutch gear.

[0009] The above technical solution is preferred, wherein an axial stepped hole is provided at one end of the adjusting rod extending into the shell, the large hole of the stepped hole is arranged away from the adjusting nut, the small hole of the stepped hole is arranged close to the adjusting nut, a thrust ball bearing is provided in the large hole, the clutch gear is arranged on a side of the adjusting rod away from the adjusting nut, one end of the first elastic member is connected to the thrust ball bearing, and the other end of the first elastic member is connected to the clutch gear.

[0010] Preferably, the above technical solution is provided with the fixed gear on the side of the clutch gear away from the adjusting nut, and one end of the main shaft passes through the fixed gear, the clutch gear, the first elastic member and the thrust ball bearing and extends into the small hole.

[0011] The above technical solution is preferred, wherein the anti-retraction mechanism includes a fixing nut, the outer circumference of the fixing nut is threadedly connected to the inner wall of the shell, the adjusting rod passes through the inner circumference of the fixing nut, and a plurality of radial elastic components are provided on the fixing nut, and the elastic components can extend out of the inner circumference and contact the outer surface of the adjusting rod.

[0012] Preferably, the anti-retraction mechanism further comprises a clamping nut, which is arranged on a side of the fixing nut close to the adjusting nut, the outer circumference of the clamping nut (32) is threadedly connected to the inner wall of the shell, and the adjusting rod passes through the inner circumference of the clamping nut.

[0013] Preferably, in the above technical solution, a plurality of grooves are provided on the outer surface of the adjusting rod corresponding to the elastic component, and the grooves are evenly distributed in a circumferential direction with the central axis of the adjusting rod as the center.

[0014] Preferably, in the above technical solution, a shell head is provided at one end of the shell away from the adjusting nut, the other end of the main shaft extends out of the shell head, and a deep groove ball bearing is provided between the shell head and the main shaft.

[0015] Preferably, the above technical solution is that the actuator also includes a screw connector joint, the screw connector joint includes a pull sleeve and a core rod, one end of the main shaft extending out of the shell head is connected to the core rod, the pull sleeve is arranged on the outside of the core rod, a second elastic member is arranged between the pull sleeve and the core rod, a ball is arranged on the core rod, and a limiting groove is arranged on the inner wall of the pull sleeve, and the ball can follow the movement of the core rod and fall into the limiting groove.

[0016] The present invention also provides a method for using the adjustable torque device, comprising the following steps:

[0017] (1) Preset torque: applying force to the adjustment component to squeeze the first elastic member, pushing the clutch gear to engage with the fixed gear, and adjusting the torque of the adjustable torque device by adjusting the deformation of the first elastic member; the anti-retraction mechanism maintains the adjustment position of the adjustment component;

[0018] (2) Connect the part to be locked with the torque output mechanism, rotate the housing, the housing drives the clutch gear to rotate, the clutch gear drives the fixed gear to rotate, the fixed gear drives the main shaft to rotate, and the main shaft drives the part to be locked to rotate; when the force applied by the outside is greater than the preset torque in the previous step, the clutch gear slides along the fixed gear and cannot drive the fixed gear to rotate;

[0019] When the torque value of the adjustable torque device needs to be readjusted, the above steps can be repeated.

[0020] Specifically, the method for using the adjustable torque device comprises the following steps:

[0021] The torque is preset, and the adjusting nut is rotated. The adjusting nut drives the adjusting rod to rotate. The adjusting rod rotates and moves relative to the housing in a direction away from the adjusting nut. The adjusting rod squeezes the first elastic member, pushing the clutch gear to engage with the fixed gear. The torque of the adjustable torque device is adjusted by adjusting the deformation of the first elastic member.

[0022] Tighten the part to be locked, rotate the housing, the housing drives the clutch gear to rotate, the clutch gear drives the fixed gear to rotate, the fixed gear drives the main shaft to rotate, the main shaft drives the screw connector joint to rotate, and the screw connector joint drives the part to be locked connected to the screw connector joint to rotate; when the external force is greater than the preset torque in the previous step, the clutch gear slides along the fixed gear and cannot drive the fixed gear to rotate;

[0023] When the torque value of the adjustable torque device needs to be readjusted, the above steps can be repeated.

[0024] The advantages and positive effects of the present invention are as follows: the present invention provides an adjustable torque device, including a torque adjustment mechanism, a torque output mechanism and an anti-backlash mechanism. By setting the torque adjustment mechanism, it is possible to adjust the deformation of the first elastic member that generates torque, thereby adjusting the upper limit of the torque; by setting the torque output mechanism, it is possible to output the torque and act on the member to be locked; by setting the anti-backlash mechanism, it is possible to maintain the adjustment position of the adjustment component, thereby preventing the position change of the adjustment component after adjustment from affecting the adjustment torque value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1is a schematic structural diagram of an adjustable torque device provided by an embodiment of the present invention;

[0026] Figure 2 is a half-section diagram of an adjustable torque device provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of an adjustment rod provided by an embodiment of the present invention;

[0028] Figure 4 is a structural schematic diagram of a housing provided by an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of a clutch gear provided by an embodiment of the present invention;

[0030] Figure 6 is a schematic structural diagram of a fixed gear provided by an embodiment of the present invention;

[0031] Figure 7 is a structural schematic diagram of a fixing nut provided by an embodiment of the present invention;

[0032] Figure 8 is a schematic structural diagram of an elastic component provided by an embodiment of the present invention;

[0033] Fig. 9 is a structural schematic diagram of a compression nut provided by an embodiment of the present invention;

[0034] Fig.10 is a schematic structural diagram of a housing head provided by an embodiment of the present invention;

[0035] Fig.11 is a schematic structural diagram of a main shaft provided by an embodiment of the present invention;

[0036] Fig.12 is a schematic structural diagram of a core rod provided by an embodiment of the present invention;

[0037] Fig.13 It is a structural schematic diagram of a pull sleeve provided in one embodiment of the present invention.

[0038] in:

[0039] 1. Torque adjustment mechanism; 11. First elastic member; 12. Clutch gear; 13. Fixed gear; 14. Adjustment nut; 15. Adjustment rod; 16. Thrust ball bearing; 141. Key; 151. Large hole; 152. Small hole; 153. Groove; 121. Inclined tooth;

[0040] 2. Torque output mechanism; 21. Shell; 22. Main shaft; 23. Shell head; 24. Pull sleeve; 25. Core rod; 211. Slideway; 212. Stopper; 221. Connecting through hole; 222. First cylindrical pin; 223. Connecting hole; 224. Second cylindrical pin; 231. Deep groove ball bearing; 232. Second sealing ring; 241. Second elastic member; 242. Position limiting groove; 243. Third cylindrical pin; 251. Ball; 252. Position limiting through hole; 253. Position limiting groove;

[0041] 3. Anti-retraction mechanism; 31. Fixing nut; 32. Pressing nut; 33. First sealing ring; 311. Elastic component; 312. Mounting hole. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0046] In the prior art, the field of medical devices lacks an adjustable torque device that can adjust the torque at any time during use. During the surgical operation, different biological screws require different torque values ​​when installed, and the installation tools need to be replaced to meet different torque requirements, which is inconvenient for the surgical operation. To this end, this embodiment provides an adjustable torque device, such as Figure 1-13 As shown, it includes a torque adjustment mechanism 1, a torque output mechanism 2 and an anti-retraction mechanism 3.

[0047] Wherein: the torque adjustment mechanism 1 includes an adjustment component, a first elastic member 11, a clutch gear 12 and a fixed gear 13, the first elastic member 11 is arranged between the adjustment component and the clutch gear 12, the adjustment component is used to adjust the deformation of the first elastic member 11, the first elastic member 11 is deformed, and can generate torque on the clutch gear 12, and the clutch gear 12 is used to transmit the torque generated by the first elastic member 11 to the fixed gear 13; the meshing of the clutch gear 12 and the fixed gear 13 is a slippable meshing, and the slippable meshing means that the clutch gear 12 and the fixed gear 13 transmit torque when they are meshed, and when the applied force is greater than the preset force, the clutch gear 12 slides along the fixed gear 13, that is, the fixed gear 13 cannot rotate, thereby achieving a certain effect of the maximum torque value to be received by the locking member. The preset force is the torque generated by the first elastic member 11 on the clutch gear 12 due to the deformation; the slipping effect is the result of the shape of the bevel-shaped teeth 121 of the clutch gear 12 and the fixed gear 13 cooperating with each other.

[0048] The torque output mechanism 2 includes a housing 21 and an actuator, the actuator is used to connect the part to be locked, and the actuator includes a main shaft 22, one end of the main shaft 22 extends into the housing 21, the clutch gear 12 is slidably connected along the axial direction of the housing 21, and the main shaft 22 is fixedly connected to the fixed gear 13; the housing 21 is rotated, the housing 21 drives the clutch gear 12 to rotate, the clutch gear 12 drives the fixed gear 13 to rotate, and the fixed gear 13 drives the main shaft 22 to rotate, thereby applying torque to the part to be locked; when the torque value adjusted by the first elastic member 11 is reached, if the housing 21 is continued to be rotated, the clutch gear 12 will slide along the housing 21 until it is disengaged from the fixed gear 13, and no longer transmits torque, thereby avoiding possible damage to the part to be locked caused by a larger torque. Specifically, an axial slideway 211 is provided on the housing 21 corresponding to the clutch gear 12, and the clutch gear 12 is slidably connected to the housing 21 through a stopper 212 (for example, the housing is provided with two symmetrically arranged slide grooves along the axial direction of the housing, and the clutch gear is provided with a groove for installing a stopper, and the stopper is arranged in the slide groove, so that the clutch gear can rotate with the rotation of the housing, and can move along the axial direction of the housing to release the compression of the first elastic member connected below the clutch gear). A connecting through hole 221 is provided on the main shaft 22, and the axis of the connecting through hole 221 is perpendicular to the axis of the main shaft 22. The fixed gear 13 is fixedly connected to the connecting through hole 221 of the main shaft 22 through a first cylindrical pin 222. The anti-retraction mechanism 3 is arranged in the housing 21, and is used to maintain the adjustment position of the adjustment component.

[0049] By setting up a torque adjustment mechanism 1, it is possible to adjust the deformation of the first elastic member 11 that generates torque, thereby adjusting the upper limit of the torque; by setting up a torque output mechanism 2, it is possible to output the torque and act on the member to be locked; by setting up an anti-retraction mechanism 3, it is possible to maintain the adjustment position of the adjustment component to prevent the position change of the adjustment component after adjustment from affecting the adjustment torque value.

[0050] Specifically, the adjustment assembly includes an adjustment nut 14 and an adjustment rod 15, one end of the adjustment rod 15 extends into the housing 21, the other end of the adjustment rod 15 extends out of the housing 21 from a direction away from the main shaft 22, the other end of the adjustment rod 15 is connected to the adjustment nut 14, the adjustment nut 14 and the housing 21 are clearance-matched, and the first elastic member 11 is arranged between the adjustment rod 15 and the clutch gear 12. In this embodiment, the adjustment assembly is arranged at the proximal end of the torque device, that is, the end close to the operator, and the adjustment assembly has the function of adjusting the force applied to the first elastic member 11, and it is more convenient to operate the adjustment nut 14 to adjust the torque value during the operation. Optionally, the adjustment rod 15 is connected to the adjustment nut 14 by a key 141.

[0051] In order to improve the stability of the adjustment rod 15 moving relative to the housing 21, one end of the adjustment rod 15 is threadedly connected to the inner wall of the housing 21. The adjustment nut 14 needs to overcome the force required for the threaded connection between the adjustment rod 15 and the housing 21 to rotate the adjustment rod 15, thereby improving the stability of the connection between the adjustment rod 15 and the housing 21 and preventing the elastic force of the first elastic member 11 from applying a force toward the adjustment nut 14 to the adjustment rod 15 to change the position of the adjustment rod 15.

[0052] In order to reduce the influence of friction on the deformation of the first elastic member 11, a thrust ball bearing 16 is further provided between the adjusting rod 15 and the first elastic member 11. Specifically, an axial stepped hole is provided at one end of the adjusting rod 15 extending into the housing 21. The large hole 151 of the stepped hole is arranged away from the adjusting nut 14, and the small hole 152 of the stepped hole is arranged close to the adjusting nut 14. A thrust ball bearing 16 is provided in the large hole 151. The clutch gear 12 is arranged on the side of the adjusting rod 15 away from the adjusting nut 14. One end of the first elastic member 11 is connected to the thrust ball bearing 16, and the other end of the first elastic member 11 is connected to the clutch gear 12.

[0053] Optionally, a fixed gear 13 is provided on the side of the clutch gear 12 away from the adjusting nut 14 , and one end of the main shaft 22 passes through the fixed gear 13 , the clutch gear 12 , the first elastic member 11 and the thrust ball bearing 16 and extends into the small hole 152 of the adjusting rod 15 .

[0054] The first elastic member 11 can be a common spring or a series of common springs of different specifications. In this embodiment, the first elastic member 11 is a butterfly spring, which has better performance, more accurate torsion adjustment and longer service life than a common spring.

[0055] In order to prevent the position of the adjusting rod 15 from changing after adjustment, the anti-retraction mechanism 3 includes a fixing nut 31, the outer circumference of the fixing nut 31 is threadedly connected to the inner wall of the housing 21, the adjusting rod 15 passes through the inner circumference of the fixing nut 31, and a plurality of radial elastic components 311 are provided on the fixing nut 31, and the elastic components 311 can extend out of the inner circumference to contact the outer surface of the adjusting rod 15. When the adjusting nut 14 is rotated, the torque applied by the operator can overcome the elastic force of the elastic component 311, thereby rotating the adjusting rod 15 to adjust the position of the adjusting rod 15, but when the operator completes the adjustment and no longer applies force to the adjusting nut 14, under the elastic force of the elastic component 311, the elastic component 311 extends out of the inner circumference of the fixing nut 31 to apply an inward pressure to the adjusting rod 15, and at the same time, under the threaded connection between the adjusting rod 15 and the inner wall of the housing 21, the position of the adjusting rod 15 can be further prevented from changing.

[0056] In order to improve the stability of the connection between the fixing nut 31 and the housing 21, the anti-retraction mechanism 3 also includes a clamping nut 32, which is arranged on the side of the fixing nut 31 close to the adjusting nut 14, and the outer circumference of the clamping nut 32 is threadedly connected to the inner wall of the housing 21, and the adjusting rod 15 passes through the inner circumference of the clamping nut 32. The inner circumference of the clamping nut 32 is provided with a first sealing ring 33.

[0057] The elastic component 311 can be a receiving rod radially arranged on the fixing nut 31, and a spring and a clamp are arranged outside or inside the receiving rod, and the clamp can contact the outer surface of the adjusting rod 15. In this embodiment, the elastic component 311 uses an existing ball plunger, which is also called a spring plunger, or a positioning bead / column, in which a spring and a steel ball are installed inside the screw thread. Under the action of the spring, the steel ball can reciprocate relative to the screw thread, and the steel ball can contact the outer surface of the adjusting rod 15. In this embodiment, the connection between the ball plunger and the fixing nut 31 is specifically as follows: a plurality of radial mounting holes 312 are arranged on the inner circumference of the fixing nut 31, and the steel ball end of the ball plunger extends from the outside of the fixing nut 31 into the mounting hole 312.

[0058] In order to prevent the adjusting nut 14 from being rotated by mistake, a plurality of grooves 153 are provided on the outer surface of the adjusting rod 15 corresponding to the elastic component 311, and the grooves 153 are evenly distributed in the circumferential direction with the central axis of the adjusting rod 15 as the center. The adjusting nut 14 needs to overcome the force required for the steel ball of the ball plunger to pass over the protrusions between the grooves 153 and the force required for the threaded connection between the adjusting rod 15 and the housing 21 when rotating the adjusting rod 15. Therefore, it is not easy to be rotated by mistake. When the adjusting nut 14 is rotated, the steel ball will produce a sound when passing over the protrusions between the grooves 153, and the degree of rotation of the adjusting rod 15 can be judged according to the sound. Optionally, in order to make the adjustment of the torque more intuitive, a scale can be set on the surface of the adjusting rod according to the actual force exerted on the locking member after rotating the adjusting nut to indicate the specific torque value.

[0059] Specifically, a housing head 23 is provided at one end of the housing 21 away from the adjusting nut 14, and the other end of the main shaft 22 extends out of the housing head 23. A deep groove ball bearing 231 is provided between the housing head 23 and the main shaft 22 to reduce the influence of friction on the torque, so that the main shaft 22 is more stable and the torque adjustment is more accurate. A second sealing ring 232 is provided between the housing head 23 and the main shaft 22. A thrust ball bearing 16 is provided between the fixed gear 13 and the housing head 23. In this embodiment, the housing head 23 is threadedly connected to the housing 21.

[0060] Specifically, the actuator assembly also includes a screw connector joint. The screw connector joint in this embodiment is preferably a screw quick-release joint. The screw connector joint includes a pull sleeve 24 and a core rod 25. One end of the main shaft 22 extending out of the housing head 23 is connected to the core rod 25. The pull sleeve 24 is sleeved on the outside of the core rod 25. A second elastic member 241 is provided between the pull sleeve 24 and the core rod 25. A ball 251 is provided on the core rod 25. A limiting groove 242 is provided on the inner wall of the pull sleeve 24. The ball 251 can follow the movement of the core rod 25 and fall into or move out of the limiting groove 242, thereby releasing the lock with one end of the screw connector or locking with the screw connector. The second elastic member 241 is a compression spring, which is sleeved outside the core rod 25. One end of the compression spring is connected to the core rod 25, and the other end of the compression spring is connected to the pull sleeve 24. The provision of the second elastic member 241 can automatically reset the core rod 25. Optionally, the end surface of the core rod 25 close to the adjusting nut 14 is welded to the main shaft 22; the core rod 25 is provided with a limiting through hole 252, and the main shaft 22 is correspondingly provided with a connecting hole 223, the second cylindrical pin 224 passes through the limiting through hole 252 and extends into the connecting hole 223, and the second cylindrical pin 224 is welded to the core rod 25 at the limiting through hole 252 to limit the position of the main shaft 22. Optionally, the pull sleeve 24 is provided with a through hole for installing the third cylindrical pin 243, and the core rod 25 is correspondingly provided with a limiting groove 253, and the third cylindrical pin 243 extends into the limiting groove 253 to limit the extension of the core rod 25, and optionally, the third cylindrical pin is welded to the pull sleeve.

[0061] The adjustable torque device may be an adjustable torque handle or other device requiring a specific torque.

[0062] Another aspect of the present embodiment provides a method for using an adjustable torque device, comprising the following steps:

[0063] The torque is preset, and the adjusting nut is rotated. The adjusting nut drives the adjusting rod to rotate. The adjusting rod rotates and moves relative to the housing in a direction away from the adjusting nut. The adjusting rod squeezes the first elastic member, pushing the clutch gear to engage with the fixed gear. The torque of the adjustable torque device is adjusted by adjusting the deformation of the first elastic member.

[0064] Tighten the part to be locked, rotate the housing, the housing drives the clutch gear to rotate, the clutch gear drives the fixed gear to rotate, the fixed gear drives the main shaft to rotate, the main shaft drives the screw connector joint to rotate, and the screw connector joint drives the part to be locked connected to the screw connector joint to rotate; when the external force is greater than the preset torque in the previous step, the clutch gear slides along the fixed gear and cannot drive the fixed gear to rotate;

[0065] When the torque value of the adjustable torque device needs to be readjusted, the above steps can be repeated.

[0066] The specific working process is:

[0067] The torque of the torque device is preset: the adjusting nut 14 is rotated, and the adjusting rod 15 is driven to rotate through the key 141. The adjusting rod 15 moves relative to the housing 21 in a direction away from the adjusting nut 14 while rotating. The adjusting rod 15 pushes the thrust ball bearing 16 to squeeze the disc spring, thereby pushing the clutch gear 12 to mesh with the fixed gear 13. The force exerted on the disc spring is adjustable, and thus the torque of the torque device is adjustable;

[0068] After the torque of the preset device is set, the housing 21 is rotated, and then the housing 21 drives the clutch gear 12 to rotate, and the clutch gear 12 drives the fixed gear 13 to rotate, and then the fixed gear 13 drives the main shaft 22 to rotate, and the main shaft 22 drives the screw connector joint to rotate, and then the screw or other parts to be locked connected to the screw connector joint is rotated; when the applied force is greater than the preset force, the clutch gear 12 slides along the fixed gear 13, that is, the fixed gear 13 cannot be rotated, thereby achieving a certain effect of the torque value to which the parts to be locked are subjected;

[0069] When the torque value needs to be readjusted, just repeat the above steps.

[0070] The adjustable torque device provided by the present invention is provided with an anti-return mechanism, so that the adjustment is more stable and reliable; the adjusting component is located at the proximal end of the handle, and has the function of adjusting the force applied to the first elastic member, and the adjustable torque handle located at the distal end of the handle relative to the adjusting component is more convenient for adjusting the torque value during surgery; the adjustable torque device provided by the present invention, the adjusting rod is provided with a groove corresponding to the elastic component, which can prevent accidental contact; the adjustable torque device provided by the present invention, the first elastic member uses a disc spring, which has better performance, more precise torque adjustment and longer service life than ordinary springs; the adjustable torque device provided by the present invention, a thrust ball bearing is provided between the adjusting rod and the first elastic member, and a deep groove ball bearing is provided between the housing head and the main shaft, which can reduce the influence of friction between the various components on the torque, so that the main shaft is more stable and the torque adjustment is more precise.

[0071] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An adjustable torque device, It is characterized in that include: A torque adjustment mechanism (1), comprising an adjustment component, a first elastic member (11), a clutch gear (12) and a fixed gear (13), wherein the first elastic member (11) is arranged between the adjustment component and the clutch gear (12), the adjustment component is used to adjust the deformation of the first elastic member (11), the first elastic member (11) is used to generate torque, and the clutch gear (12) is used to transmit the torque generated by the first elastic member (11) to the fixed gear (13); The torque output mechanism (2) comprises a housing (21) and an actuator assembly, wherein the actuator assembly comprises a main shaft (22), one end of the main shaft (22) extends into the housing (21), the clutch gear (12) is slidably connected along the axial direction of the housing (21), and the main shaft (22) is fixedly connected to the fixed gear (13); an anti-retraction mechanism (3), the anti-retraction mechanism (3) being arranged in the housing (21) and being used for maintaining the adjustment position of the adjustment component; The adjusting assembly comprises an adjusting nut (14) and an adjusting rod (15), one end of the adjusting rod (15) extends into the housing (21), the other end of the adjusting rod (15) extends out of the housing (21) in a direction away from the main shaft (22), the other end of the adjusting rod (15) is connected to the adjusting nut (14), the adjusting nut (14) and the housing (21) are clearance-matched, and the first elastic member (11) is arranged between the adjusting rod (15) and the clutch gear (12); An axial stepped hole is provided at one end of the adjusting rod (15) extending into the housing (21); a large hole (151) of the stepped hole is arranged away from the adjusting nut (14); a small hole (152) of the stepped hole is arranged close to the adjusting nut (14); a thrust ball bearing (16) is arranged in the large hole (151); the clutch gear (12) is arranged on a side of the adjusting rod (15) away from the adjusting nut (14); one end of the first elastic member (11) is connected to the thrust ball bearing (16); and the other end of the first elastic member (11) is connected to the clutch gear (12).

2. The adjustable torque device according to claim 1, Features: The fixed gear (13) is provided on the side of the clutch gear (12) away from the adjusting nut (14), and one end of the main shaft (22) passes through the fixed gear (13), the clutch gear (12), the first elastic member (11) and the thrust ball bearing (16) and extends into the small hole (152).

3. The adjustable torque device according to claim 1, Features: The anti-retraction mechanism (3) comprises a fixing nut (31), the outer circumference of which is threadedly connected to the inner wall of the housing (21), the adjusting rod (15) passes through the inner circumference of the fixing nut (31), and a plurality of radial elastic components (311) are provided on the fixing nut (31), and the elastic components (311) can extend out of the inner circumference to contact the outer surface of the adjusting rod (15).

4. The adjustable torque device according to claim 3, Features: The anti-retraction mechanism (3) also includes a clamping nut (32), which is arranged on a side of the fixing nut (31) close to the adjusting nut (14), the outer circumference of the clamping nut (32) is threadedly connected to the inner wall of the shell (21), and the adjusting rod (15) passes through the inner circumference of the clamping nut (32).

5. The adjustable torque device according to claim 3, Features: The outer surface of the adjusting rod (15) is provided with a plurality of grooves (153) corresponding to the elastic component (311), and the grooves (153) are evenly distributed in a circumferential direction with the central axis of the adjusting rod (15) as the center.

6. The adjustable torque device according to claim 1, Features: An outer shell head (23) is provided at one end of the housing (21) away from the adjusting nut (14), the other end of the main shaft (22) extends out of the outer shell head (23), and a deep groove ball bearing (231) is provided between the outer shell head (23) and the main shaft (22).

7. The adjustable torque device according to claim 6, Features: The actuator assembly also includes a screw connector joint, which includes a pull sleeve (24) and a core rod (25). One end of the main shaft (22) extends out of the shell head (23) and is connected to the core rod (25). The pull sleeve (24) is sleeved on the outside of the core rod (25). A second elastic member (241) is provided between the pull sleeve (24) and the core rod (25). A ball (251) is provided on the core rod (25). A limiting groove (242) is provided on the inner wall of the pull sleeve (24). The ball (251) can follow the movement of the core rod (25) and fall into the limiting groove (242).

8. A method for using the adjustable torque device according to any one of claims 1 to 7, It is characterized in that The following steps are involved: (1) Preset torque: applying a force to the adjustment component to make it squeeze the first elastic member (11), push the clutch gear (12) to engage with the fixed gear (13), and adjust the torque of the adjustable torque device by adjusting the deformation of the first elastic member (11); the anti-retraction mechanism (3) maintains the adjustment position of the adjustment component; (2) Connecting the member to be locked with the torque output mechanism, rotating the housing (21), the housing (21) drives the clutch gear (12) to rotate, the clutch gear (12) drives the fixed gear (13) to rotate, the fixed gear (13) drives the main shaft (22) to rotate, and the main shaft (22) drives the member to be locked to rotate; when the force applied by the outside is greater than the preset torque in the previous step, the clutch gear (12) slides along the fixed gear (13) and cannot drive the fixed gear (13) to rotate; When the torque value of the adjustable torque device needs to be readjusted, the above steps can be repeated.

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