A torque wrench

Abstract

The present application provides a torque wrench, comprising: a wrench operating body; a torque generating part, which is sleeved on the outside of the wrench operating body to convert the pressing force into a rotational torque; a torque transmitting part, which is sleeved on the outside of the wrench operating body, one end of which is connected with the torque generating part, and the other end is connected with the wrench operating body; wherein the torque transmitting part transmits the rotational torque generated by the torque generating part to the wrench operating body to realize the rotation of the wrench operating body. The present application converts the pressing force into a rotational torque, drives the torque transmitting part to rotate, realizes torque transmission, and thus drives the wrench operating body to rotate, thereby realizing rapid installation of the ultrasonic knife and the transducer.

Description

Technical Field

[0001] The present application relates to a tool for installing surgical tools, and in particular to a torque wrench for assembling an ultrasonic knife and a transducer. Background Art

[0002] Some surgical tools require the assembly of an ultrasonic scalpel and a transducer, and currently, a torque wrench is usually used to achieve a threaded connection between the ultrasonic scalpel and the transducer. The existing solution is basically to connect the wrench operating part of the torque wrench to the ultrasonic scalpel, and the rotation drives the ultrasonic scalpel to rotate to achieve a threaded connection with the transducer.

[0003] Current torque wrenches generally rotate half a turn at a time, which is inefficient, resulting in a time-consuming and labor-intensive assembly process, slow installation, and inefficient completion of the surgery.

[0004] In view of this, there is an urgent need to provide a torque wrench to efficiently complete the assembly of the ultrasonic knife and the transducer.

[0005] The contents of the background technology section are merely disclosed the technologies known to the inventors and are not considered to represent the prior art in the field. Summary of the invention

[0006] The present application aims to provide a torque wrench to solve at least one problem existing in the prior art.

[0007] According to a first aspect of the present application, a torque wrench is provided, comprising:

[0008] Wrench operating body;

[0009] A torque generating part, which is sleeved on the outside of the wrench operating body and realizes the conversion of pressing force into rotational torque;

[0010] A torque transmission part, which is sleeved on the outside of the wrench operating body, one end of which is connected to the torque generating part, and the other end of which is connected to the wrench operating body;

[0011] The torque transmission part transmits the rotational torque generated by the torque generation part to the wrench operating body to realize the rotation of the wrench operating body.

[0012] In some embodiments, the torque generating unit comprises:

[0013] A ball screw nut, which is used to convert the pressing force into a rotational torque;

[0014] A first transmission chuck is arranged at one end of the ball screw nut.

[0015] In some embodiments, the torque transmission part comprises:

[0016] A second transmission chuck, which is clamped and adapted with the first transmission chuck to transmit the rotational torque to the wrench operating body;

[0017] The wrench seat is connected with the wrench operating body.

[0018] In some embodiments, the first transmission chuck includes a first protrusion, and the second transmission chuck includes a second protrusion. The second protrusion and the first protrusion are misaligned with each other through a gap to transmit torque when the first transmission chuck and the second transmission chuck rotate relative to each other.

[0019] In some embodiments, one end of the wrench operating body is an execution part, and at least one transmission gear table is provided at one end of the wrench operating body close to the execution part, and at least one torque constant structure cooperating with the transmission gear table is provided on the wrench seat.

[0020] In some embodiments, the torque constant structures are arranged in several groups, each group of torque constant structures includes two symmetrically arranged torque constant structures, and the number of the transmission gear platforms corresponds one to one to the number of the torque constant structures.

[0021] In some embodiments, the torque constant structure is an elastic force limiting structure, which includes a groove that provides an avoidance space; an elastic slot platform protruding from the inner side of the wrench seat located at the edge of the groove, and an inclined surface formed on the side of the elastic slot platform facing the center of the wrench seat, and the transmission gear platform includes a beveled edge arranged on the outer side, and the beveled edge cooperates with the beveled surface of the elastic slot platform.

[0022] In some embodiments, a positioning baffle structure is provided at a portion of the wrench operating body close to the execution portion, and the positioning baffle structure is assembled and matched with the wrench seat.

[0023] In some embodiments, the drive gear table is rigid.

[0024] In some embodiments, the second protrusion and the first protrusion may both be polyhedral structures.

[0025] In some embodiments, an elastic element is disposed between the second protrusion and the first protrusion, and the two are brought into contact or separated by the elastic element.

[0026] In some embodiments, the torque generating part is provided with a first groove and a second groove, the first groove is arranged on the first transmission chuck and partially extends to the rotating part of the ball screw nut, the second groove is arranged through the rotating part, and the inner diameter of the first groove is larger than the inner diameter of the second groove, and is distributed in a stepped manner, and the inner side surface of the first groove is the fixing surface of the first elastic element; the second transmission chuck is provided with a plane with a second protrusion and the side surface of the second protrusion close to the center of the second transmission chuck is the fixing surface of the second elastic element.

[0027] In some embodiments, the ball screw nut includes a rotating member, a nut, a top screw, and a ball.

[0028] A ball screw thread is provided in the middle of the rotating member; the top screw fixes the ball on the rotating member, and the ball and the ball screw thread contact each other to form a sliding contact, converting the pressing force into a rotational torque.

[0029] In some embodiments, a top screw thread hole is provided in the middle of the nut, and a ball is installed inside the top screw thread hole.

[0030] In some embodiments, a fixed slot is provided at the other end of the wrench operating body, a main body is formed between the fixed slot and the positioning baffle structure of the wrench operating body, an outer diameter of the fixed slot is larger than an outer diameter of the main body, and a sliding slope is provided at the end of the fixed slot.

[0031] The end of the wrench operating body close to the fixed slot is provided with a groove structure arranged along the axial direction.

[0032] The end of the rotating member away from the first transmission chuck is provided with a clamping groove boss, the inner diameter of the clamping groove boss is smaller than the outer diameter of the fixed clamping groove,

[0033] When the rotating member is sleeved on the wrench operating body, elastic deformation is generated through the groove structure during the process of the fixed slot penetrating into the rotating member.

[0034] Based on the above embodiments of the present application, the beneficial effects of the present application include one or more combinations of the following effects:

[0035] The embodiment of the present application realizes torque transmission by converting the pressing force into rotational torque, thereby driving the torque transmission part to rotate, thereby driving the wrench operating body to rotate, thereby driving the ultrasonic knife to rotate, and then realizing rapid installation of the ultrasonic knife and the transducer.

[0036] Specifically, the ball is fixed on the ball screw nut by a top screw, and the top screw of the ball screw nut is pressed, so that the rotating part generates a pressure transmitted to the wrench seat end of the torque transmission part, and the force presses the spring, so that the bite teeth and the rotating teeth bite and abut, and the ball and the ball screw thread contact each other to form a sliding contact, and the pressing force is converted into a rotational torque to reduce friction;

[0037] At the same time, by pressing the top screw, the ball slides in the ball screw thread and converts the pressing force into a torsional force, thereby driving the rotating part to rotate. The rotating teeth and the engaging teeth at the end of the rotating part cooperate to drive the wrench seat to rotate, thereby realizing torque transmission;

[0038] When the ball reaches the end of the rotation stroke of the ball screw thread, the nut can be manually rotated in the reverse direction, and the rotating part is lifted up by the internal spring and disengaged from the engaging teeth on the transmission boss. At this time, the rotating part can rotate freely. When the nut is reversely rotated to the other end of the ball screw thread, the rotating part can be repeatedly pressed to drive the rotating part to rotate. By repeating this process, the pressing force can be converted into a rotation torque, thereby realizing the rapid rotation and installation of the ultrasonic scalpel and the transducer. At the same time, the problem of time-consuming, labor-intensive and slow installation in the existing ultrasonic scalpel and transducer assembly process is solved, which provides convenience for installation and saves time for surgery.

[0039] In addition, the wrench seat in the embodiment of the present application is provided with a torque constant structure that cooperates with the transmission gear table, which can further realize directional limited torque rapid rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following is a detailed description of the implementation methods of the present application in conjunction with the accompanying drawings. Here, the drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the accompanying drawings:

[0041] Figure 1 A schematic structural diagram of a torque wrench according to an embodiment of the present application is shown;

[0042] Figure 2 A front view of a torque wrench according to an embodiment of the present application is shown;

[0043] Figure 3 Show Figure 2 Section view along AA direction;

[0044] Figure 4 Show Figure 2 Section along BB direction;

[0045] Figure 5 A schematic diagram showing the structure of a wrench operating body according to an embodiment of the present application is shown;

[0046] Figure 6 A front view of a torque wrench according to an embodiment of the present application is shown;

[0047] Figure 7 Show Figure 6 Cross-section along FF direction;

[0048] Figure 8-9 A schematic diagram showing the structure of a rotating member of a torque generating portion according to an embodiment of the present application;

[0049] Fig.10 A front view of a rotating member according to an embodiment of the present application is shown;

[0050] Fig.11 Show Fig.10 Cross-section along FF direction;

[0051] Fig.12 Show Fig.11 A magnified view of part B;

[0052] Fig.13 A schematic structural diagram of a nut of a torque generating portion according to an embodiment of the present application is shown.

[0053] Figure 14-15 A schematic structural diagram of a torque transmission part according to an embodiment of the present application is shown;

[0054] Fig.16 A front view of a torque transmission portion according to an embodiment of the present application is shown;

[0055] Fig.17 Show Fig.16 Section view along AA direction;

[0056] Fig.18 A cross-sectional view showing the connection between a torque wrench and an ultrasonic knife sleeve assembly, and the threaded assembly of an ultrasonic knife and a transducer according to an embodiment of the present application. DETAILED DESCRIPTION

[0057] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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 application 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 a limitation on the present application. In addition, the terms "first" and "second" are only used for description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more similar features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0059] In the description of this application, 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, an electrical connection, or a mutual communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the relative height of the first feature in a certain dimension is higher than that of the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the relative position of the first feature in a certain dimension is smaller than that of the second feature.

[0061] Different embodiments or examples are provided below to realize different structures of the present application. In order to simplify the present application, the parts and settings of specific examples are described below. Of course, they are only used as examples, and the purpose is not to limit the present application. The present application can repeat the figure numerals in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings described in itself. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can use the application of other processes and / or the alternative use of other materials according to the enlightenment of the present application.

[0062] Some preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the following description is for illustrative purposes and is not intended to limit the scope of protection of the present application.

[0063] Figure 1-4 is a schematic diagram of the structure of a torque wrench according to some embodiments of the present application. Figure 1-4The torque wrench 100 includes a wrench operating body 1, a torque generating part 10, and a torque transmitting part 2. The torque generating part 10 is sleeved on the outside of the wrench operating body 1 to convert the pressing force into a rotational torque; the torque transmitting part 2 is sleeved on the outside of the wrench operating body 1, one end of which is matched and connected with the torque generating part 10, and the other end is matched and connected with the wrench operating body 1; the torque transmitting part 2 transmits the rotational torque generated by the torque generating part 10 to the wrench operating body 1 to realize the rotation of the wrench operating body 1.

[0064] For some specific examples, see Figure 5-7 One end (for example, the front end) of the wrench operating body 1 is a transmission actuator 11, and the transmission actuator 11 cooperates with the ultrasonic knife sleeve assembly to transmit torque;

[0065] A positioning baffle structure 12 is provided at a portion of the wrench operating body 1 close to the transmission execution part 11, and the positioning baffle structure 12 is assembled and cooperated with the torque transmission part 2 to play a limiting role;

[0066] At least one transmission gear 16 is provided at one end of the wrench operating body close to the transmission execution part 11. Figure 6-7 As shown, the transmission gear platform 16 includes a bevel 17 arranged on its outer side surface, and another longer side surface of the transmission gear platform 16 is a transmission gear locking surface 19; the bevel 17 and the transmission gear locking surface 19 are adapted to the torque transmission part 2 to achieve constant torque, as described in detail below.

[0067] In some specific examples, at least one transmission gear 16 is circumferentially arranged on the outer cylindrical surface near the positioning baffle structure 12, such as but not limited to 1, 2, 3, 4, 5, 6, etc. Taking 4 transmission gears 16 as an example, the 4 transmission gears 16 can be randomly arranged or evenly spaced. In the case of evenly spaced arrangement, the transmission gears 16 are distributed on the outer cylindrical surface at 90° to each other.

[0068] In some embodiments, the drive gear 16 is rigid.

[0069] In some specific embodiments, a fixed slot 14 is provided at the other end of the wrench operating body 1, and a main body 13 is formed between the fixed slot 14 and the transmission gear platform 16. The outer diameter of the fixed slot 14 is larger than the outer diameter of the main body 13, and a sliding slope 18 is provided at the end of the fixed slot 14. Furthermore, the end face of the fixed slot 14 is a 90° vertical surface.

[0070] In some specific embodiments, a groove structure 15 arranged along the axial direction is provided at the end of the wrench operating body close to the fixed slot 14 , and the fixed slot 14 can be elastically deformed by the avoidance space provided by the groove structure 15 .

[0071] For some specific examples, see Figure 1 , 2 , 4 and Figure 8-13 , the torque generating unit 10 comprises:

[0072] A ball screw nut, which is used to convert the pressing force into a rotational torque;

[0073] A first transmission chuck is arranged at one end of the ball screw nut.

[0074] In some specific embodiments, the ball screw nut includes a rotating part 3, a nut 5, a top screw 6, and a ball 7.

[0075] Furthermore, a ball screw thread 32 is provided in the middle of the rotating member 3; specifically, the length of the thread depends on the actual use and can be set according to the actual situation. Accordingly, the pitch of the ball screw thread 32 can be set according to the actual situation to facilitate the conversion of the pressing force into the rotational torque.

[0076] In some specific examples, a top screw thread hole 52 is provided in the middle of the nut 5 , and a plurality of groups of top screw thread holes 52 may be provided according to actual conditions.

[0077] Furthermore, a ball 7 is installed inside the top screw thread hole 52 of the nut 5, and the top screw 6 fixes the ball 7 on the rotating member 3. The ball 7 and the ball screw thread 32 contact each other to form a sliding contact, which converts the pressing force into a rotational torque and reduces friction.

[0078] In some specific examples, the first transmission chuck is disposed at the end of the rotating member of the torque generating part 10, and the first transmission chuck includes a rotating boss 31 and a first protrusion disposed on the end surface of the rotating boss 31, preferably, the first protrusion is a rotating tooth 33. In some specific embodiments, the rotating boss 31 can be integrally formed at the end of the rotating member, but is not limited thereto.

[0079] A first groove 34 and a second groove 36 are axially provided inside the rotating part 3 of the torque generating part 10. The first groove 34 passes through the first transmission chuck (specifically passes through the rotating boss of the first transmission chuck) and partially extends to the rotating part of the ball screw nut. The second groove 36 passes through the rotating part. The inner diameter of the first groove 34 is larger than the inner diameter of the second groove 36. The first groove 34 and the second groove 36 are distributed in a stepped shape. The inner side surface of the first groove 34 is the first elastic element fixing surface 35 for fixing the elastic element. The elastic element is specifically described below.

[0080] See also Fig.12, along the FF section direction, at the end of the rotating member 3 away from the first transmission chuck, i.e., the tail end, specifically, a slot boss 38 is provided at the end of the second groove 36, and a second groove inclined surface 37 is provided on one side of the slot boss 38 (specifically, the side facing the second groove 36), and the other side of the slot boss 38 is a fixed groove that passes through the end of the rotating member, and the inner diameter of the fixed groove is larger than the inner diameter of the slot boss 38, and is adapted to the outer diameter of the fixed groove 14. The second groove inclined surface 37 mainly cooperates with the sliding inclined surface 18 to play a guiding role, and the slot boss 38 is engaged with the fixed groove 14 to assemble the torque generating part 2 into the component of the wrench operating body 1. Specifically, the inner diameter of the slot boss 38 is smaller than the outer diameter of the fixed groove 14. When the rotating member 3 is sleeved on the wrench operating body 1, the fixed groove 14 can be elastically deformed through the avoidance space formed by the groove structure 15 during the process of penetrating the rotating member 3, so as to pass through the slot boss 38 and be clamped in the fixed groove.

[0081] In some embodiments, see Figure 14-17 , the torque transmission part 2 comprises:

[0082] A wrench seat, which is connected with the wrench operating body 1;

[0083] The second transmission chuck is arranged at one end of the wrench seat and is engaged with the first transmission chuck to transmit the rotational torque to the wrench operating body 1 through the wrench seat.

[0084] In some embodiments, the wrench seat of the torque transmission part 2 is an annular structure, and the wrench seat has a penetrating inner hole 26 ; the wrench operating body 1 is disposed in the inner hole 26 .

[0085] In some specific examples, the other end of the wrench seat is assembled with the positioning baffle structure 12 to play a limiting role. Specifically, the torque transmission part 2 passes through the main body 13 of the wrench operating body 1 through the inner hole 26 until one end of the torque transmission part 2 contacts the positioning baffle structure 12.

[0086] In some specific embodiments, the second transmission chuck includes a transmission boss 28 and a second protrusion arranged on the end face of the transmission boss 28, the second protrusion is adapted to the first protrusion, and the second protrusion and the first protrusion are misaligned with each other through a gap, so as to transmit torque when the first transmission chuck and the second transmission chuck rotate relative to each other.

[0087] In some specific embodiments, the transmission boss 28 may be integrally formed at the end of the wrench portion away from the positioning baffle structure 12 , but is not limited thereto.

[0088] Preferably, the second protrusion is an engaging tooth 23 formed on one end surface of the transmission boss 28. The engaging tooth 23 cooperates with the rotating tooth 33. After the two are misaligned with each other through a gap, they play a role in transmitting torque during relative rotational motion.

[0089] In some specific embodiments, an elastic element is disposed between the second protrusion and the first protrusion, and the two are brought into contact or separated by the elastic element.

[0090] In some specific examples, the second transmission chuck is provided with a second protrusion whose plane and the side surface close to the center of the second protrusion form a second elastic element fixing surface, which cooperates with the first elastic element fixing surface of the torque production part 10, and the elastic element abuts between the first elastic element fixing surface and the second elastic element fixing surface.

[0091] In some specific embodiments, the second protrusion and the first protrusion are both fan-shaped structures. In some specific examples, the side surfaces of the second protrusion and the first protrusion close to the center are both arc-shaped structures. Specifically, both side surfaces of the engaging teeth 23 and the rotating teeth 33 are arc-shaped structures with the center of the circle as the center point.

[0092] In some other specific embodiments, the second protrusion and the first protrusion are both polyhedral structures. In some specific examples, the side surfaces of the second protrusion and the first protrusion close to the center are both planar structures, and the other side surfaces can be planar structures or arc structures. For example, the side surface of the meshing tooth 23 close to the center (such as the center of the circle) is a planar structure, and the combination of the plane of the meshing tooth 23 close to the center of the circle and the plane of the transmission boss 28 where the meshing tooth 23 is arranged is the second elastic element fixing surface.

[0093] In some specific embodiments, the elastic element includes but is not limited to the spring 4. When the spring 4 is not subjected to force, the torque generating part 10 is separated from the torque transmitting part 2 through the first elastic element fixing surface 35 and the second elastic fixing surface; when the spring 4 is subjected to force, it is squeezed between the first elastic element fixing surface 35 and the second elastic fixing surface, so that the torque generating part 10 and the torque transmitting part 2 are in contact with each other.

[0094] In some embodiments, the wrench seat of the torque transmission part 2 is provided with at least one torque constant structure that cooperates with the transmission gear platform 16 of the wrench operating body 1. Specifically, the torque constant structures are provided in several groups, each group of torque constant structures includes two symmetrically arranged torque constant structures, and the number of the transmission gear platforms 16 corresponds to the number of the torque constant structures.

[0095] Specifically, one or more torque constant structures can be set, such as but not limited to 2, 3, 4, 5, 6, etc. The specific number can be determined according to the actual need of the torsion force. The more the number is set, the greater the limit torque generated. It is more stable to set an even number symmetrically. The torque transmission part 2 is set corresponding to the transmission gear 16. When 4 torque constant structures corresponding to the 4 transmission gears 16 arranged at equal intervals are set, the 4 elastic torque constant structures are circumferentially distributed at 90° to each other to achieve a stable effect.

[0096] In some specific embodiments, the torque constant structure is an elastic force limiting structure 21 .

[0097] Specifically, the elastic limiting structure 21 includes a groove providing an escape space; an elastic clamping groove platform 24 protruding from the inner side of the wrench seat at the edge of the groove, and an inclined surface 25 formed on the side of the elastic clamping groove platform 24 facing the center of the wrench seat.

[0098] In some specific embodiments, the groove may be an annular groove 22. The use of an annular groove can make it easier for the elastic clamping groove platform 24 to produce elastic deformation based on the groove. In other specific embodiments, the groove may also be a groove arranged along the axial direction of the wrench seat to simplify the groove structure, but is not limited thereto.

[0099] Furthermore, the bevel 17 of the transmission gear platform 16 cooperates with the bevel 25 of the elastic clamping groove platform 24 .

[0100] Furthermore, the elastic slot platform 24 further includes an elastic slot platform locking surface 27 . After the transmission gear platform 16 rotates over the inclined surface 25 , its transmission tooth locking surface 19 abuts against the elastic slot platform locking surface 27 to achieve position limiting.

[0101] When the bevel 17 and the bevel 25 of the elastic slot table 24 rotate relative to each other, due to the different inner and outer diameters, the two need to overcome interference to rotate with each other. At this time, in order to overcome the interference, the bevel 25 of the elastic slot table needs to deform the elastic limiting structure 21 to obtain continued rotational movement, thereby ensuring the constant torque of the torque wrench. It should be understood by those skilled in the art that the torque of the torque wrench cannot be too large or too small. When the torque is too large, the ultrasonic blade head and the transducer thread are disengaged, making the threaded connection impossible. When the torque is too small, it cannot be tightened, resulting in an inability to achieve smooth installation.

[0102] In some embodiments of the present application, since the transmission gear platform 16 is not elastic but rigid, the elastic slot platform 24 of the elastic limiting structure 21 is more likely to undergo elastic deformation based on the groove.

[0103] In the embodiment of the present application, the elastic slot table 24 and the transmission gear table 16 cooperate with each other. When the wrench seat of the wrench transmission part 2 rotates clockwise, the two are in contact with each other as inclined surfaces. During the rotation process, the elastic limit structure 21 will be deformed, and the two inclined surfaces move against each other to produce a reverse rotation resistance. In the case of continuous force rotation, the elastic limit structure 21 will deform and the two inclined surfaces will cross each other and make a clicking sound. This process can ensure that the torque wrench provides a constant tightening torque while reminding the user that a tightening has been completed. When the wrench seat rotates counterclockwise, the two sides are stuck structures, and the wrench seat can drive the wrench operating body 1 to rotate. When the ball screw nut is pressed to drive the rotating member 3 to rotate, the wrench operating body 1 can achieve a single-direction quantitative torque rotation and a reverse locking rotation function.

[0104] The manual wrench provided in the embodiment of the present application is connected to the ultrasonic knife sleeve assembly, and the ultrasonic knife is threadedly assembled with the transducer. Specifically, see Fig.18 The wrench operating body 1 is provided with a through hole along the axial direction, and the transmission execution part 11 of the wrench operating body 1 cooperates with the ultrasonic knife sleeve assembly to transmit torque. The ultrasonic knife 11' of the ultrasonic knife sleeve assembly passes through the through hole of the wrench operating body 1, and one end of the transmission execution part 11 close to the ultrasonic knife 11' is threadedly connected with the transducer 12'; the embodiment of the present application fixes the ball 7 on the ball screw nut through the top screw 6, and presses the top screw 6 of the ball screw nut, so that the rotating part 3 generates a pressure transmitted to the wrench seat end of the torque transmission part 2, and the force tightens the spring, so that the bite teeth 23 and the rotating teeth 33 bite and abut, and the ball 7 and the ball screw thread 32 contact each other to form a sliding contact, and the pressing force is converted into a rotational torque to reduce friction; at the same time, by pressing the top screw 6, the ball 7 slides in the ball screw thread 32 The pressing force is then converted into a torsional force, thereby driving the rotating member 3 to rotate. The end of the rotating member 3 is provided with a rotating tooth 33 which cooperates with the engaging tooth 23 to drive the wrench seat to rotate, thereby realizing torque transmission. When the ball 7 reaches the end of the rotation stroke of the ball screw thread 32, the nut 5 can be manually rotated in the opposite direction. The rotating member 3 is lifted up by the internal spring 4 and disengaged from the engaging tooth 23 on the transmission boss 28. At this time, the rotating member 3 can rotate freely. When the nut 5 is reversely rotated to the other end of the ball screw thread 32, the rotating member 3 can be repeatedly pressed to drive the rotating member 3 to rotate. By repeating this process, the pressing force can be converted into a rotational torque, thereby realizing rapid rotation and installation of the ultrasonic knife and the transducer. At the same time, the problem of time-consuming, labor-intensive and slow installation in the existing ultrasonic knife and transducer assembly process is solved, which provides convenience for installation and saves time for surgery.

[0105] In addition, the wrench seat of the embodiment of the present application is provided with a torque constant structure cooperating with the transmission gear table 16, which can further realize the directional limited torque rapid rotation;

[0106] In summary, the embodiment of the present application can not only ensure constant torque, but also convert the pressing force into torsional force by sliding the ball 7 in the ball screw thread 32, thereby realizing rapid installation of the ultrasonic knife and the transducer.

[0107] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0108] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used for the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which can be changed according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the method of general digit retention. Although the numerical domains and parameters used to confirm the breadth of the range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0109] Each patent, patent application, patent application disclosure, and other materials, such as articles, books, instructions, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety. Except for application history documents that are inconsistent with or conflicting with the content of this application, documents that limit the broadest scope of the claims of this application (currently or later attached to this application) are also excluded. It should be noted that if the description, definition, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content described in this application, the description, definition, and / or use of terms in this application shall prevail.

[0110] Finally, it should be noted that the above is only an example embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A torque wrench, characterized in that: The torque wrench comprises: Wrench operating body; A torque generating part, which is sleeved on the outside of the wrench operating body and realizes the conversion of pressing force into rotational torque; A torque transmission part, which is sleeved on the outside of the wrench operating body, one end of which is connected to the torque generating part, and the other end of which is connected to the wrench operating body; Wherein, the torque transmission part transmits the rotational torque generated by the torque generation part to the wrench operating body to realize the rotation of the wrench operating body; The torque generating unit includes: A ball screw nut, which is used to convert the pressing force into a rotational torque; A first transmission chuck, which is arranged at one end of the ball screw nut; The ball screw nut comprises a rotating member (3), a nut (5), a top screw (6), and a ball (7), and the first transmission chuck is arranged at the end of the rotating member; The torque transmission part comprises: A second transmission chuck, which is clamped and adapted with the first transmission chuck to transmit the rotational torque to the wrench operating body; A wrench seat, which is cooperatively connected with the wrench operating body; The first transmission chuck includes a first protrusion, and the second transmission chuck includes a second protrusion, and the second protrusion and the first protrusion are staggered with each other through a gap, so as to transmit torque when the first transmission chuck and the second transmission chuck rotate relative to each other; An elastic element is arranged between the second protrusion and the first protrusion, and the two are abutted or separated by the elastic element.

2. The torque wrench according to claim 1, characterized in that: One end of the wrench operating body is an execution part (11), and at least one transmission gear platform (16) is provided at one end of the wrench operating body close to the execution part (11), and at least one torque constant structure cooperating with the transmission gear platform (16) is provided on the wrench seat.

3. The torque wrench according to claim 2, characterized in that: The torque constant structures are arranged in several groups, each group of torque constant structures includes two symmetrically arranged torque constant structures, and the number of the transmission gear platforms corresponds to the number of the torque constant structures.

4. The torque wrench according to claim 3, characterized in that: The torque constant structure is an elastic force limiting structure (21), the elastic force limiting structure (21) comprising a groove providing an escape space; an elastic force slot platform (24) convexly arranged on the inner side surface of the wrench seat located at the edge of the groove, an inclined surface (25) formed on the side surface of the elastic force slot platform (24) facing the center of the wrench seat, and the transmission gear platform (16) comprising an inclined edge (17) arranged on the outer side surface, the inclined edge (17) cooperating with the inclined surface (25) of the elastic force slot platform.

5. The torque wrench according to claim 2, characterized in that: A positioning baffle structure (12) is provided at a portion of the wrench operating body (1) close to the execution portion (11), and the positioning baffle structure (12) is assembled and matched with the wrench seat.

6. The torque wrench according to any one of claims 2 to 4, characterized in that: The transmission gear table (16) is rigid.

7. The torque wrench according to claim 1, characterized in that: The second protrusion and the first protrusion are both fan-shaped structures, or are both polyhedral structures.

8. The torque wrench according to claim 1, characterized in that: The torque generating portion (10) is provided with a first groove (34) and a second groove (36); the first groove (34) is provided on the first transmission chuck and partially extends to the rotating part of the ball screw nut; the second groove (36) is provided through the rotating part; the inner diameter of the first groove (34) is larger than the inner diameter of the second groove (36) and is distributed in a stepped manner; the inner side surface of the first groove (34) is a first elastic element fixing surface (35); and a combination of a plane provided with a second protrusion on the second transmission chuck and a side surface of the second protrusion close to the center of the second transmission chuck is a second elastic element fixing surface.

9. The torque wrench according to claim 1, characterized in that: A ball screw thread (32) is provided in the middle of the rotating member (3); a top screw (6) fixes the ball (7) on the rotating member (3); the ball (7) and the ball screw thread (32) contact each other to form a sliding contact, thereby converting a pressing force into a rotational torque.

10. The torque wrench according to claim 9, characterized in that: A top threaded hole (52) is provided in the middle of the nut (5), and a ball (7) is installed inside the top threaded hole (52).

11. The torque wrench according to claim 9, characterized in that: The other end of the wrench operating body (1) is provided with a fixed slot (14), a main body is formed between the fixed slot (14) and the positioning baffle structure (12) of the wrench operating body, the outer diameter of the fixed slot (14) is larger than the outer diameter of the main body, and a sliding slope (18) is provided at the end of the fixed slot (14). The end of the wrench operating body close to the fixed slot (14) is provided with a groove structure (15) arranged along the axial direction. A clamping groove boss (38) is provided at one end of the rotating member (3) away from the first transmission chuck, and the inner diameter of the clamping groove boss (38) is smaller than the outer diameter of the fixed clamping groove (14). When the rotating member (3) is sleeved on the wrench operating body (1), When the fixed slot (14) is inserted into the rotating member (3), elastic deformation is generated through the groove structure (15).

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