59 results about "Jaw opening" patented technology

The invention discloses a sliding block type tong head mechanism which comprises a jaw seat, a sliding block, a first tong claw and a second tong claw, the near ends of the two tong claws are connected with a base disc, the jaw seat is rotationally connected with the base disc, and the sliding block is connected with a traction rope, so that when the traction rope moves, the sliding block is driven to move in the jaw seat, and opening and closing of the tong claws are controlled; the problems that an existing gripper jaw is insufficient in opening force and cannot open tissue are solved, and the pair of forceps is simple in structure and easy to operate.

The utility model discloses a stainless steel clamping jaw opening mechanism, and relates to the technical field of clamping jaws. Comprising a supporting plate and a clamping jaw assembly, movable plates are movably arranged on the two sides of the supporting plate, and first air cylinders are arranged on the sides, away from the supporting plate, of the movable plates; the clamping jaw assembly is arranged on the side, away from the air cylinder, of the movable plate and comprises a clamping jaw push plate and a fixed plate, the clamping jaw push plate is movably arranged on one side of the fixed plate, a second air cylinder used for driving the clamping jaw push plate is arranged at one end of the fixed plate, and the end, away from the second air cylinder, of the clamping jaw push plate is movably sleeved with a linkage rod. The two clamping jaw assemblies can be controlled to be close to or far away from each other through the first air cylinder, preliminary clamping of products is achieved, the second air cylinder can be started to control the clamping jaw bodies to be matched with the auxiliary clamping jaws to further clamp the products, the structure is simple and compact, due to the arrangement of the U-shaped grooves, the clamping jaw push plates are convenient to disassemble, later maintenance is facilitated, economic benefits are met, and the application prospect is wide.

The present application relates to a kind of device for realizing posture adjustment and bunching, it solves the technical problem that the pose of air pipe in roll-shaped infusion apparatus is not fixed, leading to that roll-shaped infusion apparatus cannot smoothly and reliably enter packaging bag during the operation of existing infusion apparatus automatic winding packaging equipment, the width of whole roll-shaped infusion apparatus is large, which is not conducive to subsequent reliable loading into packaging bag;It includes air pipe posture adjustment device and bunching device, air pipe posture adjustment device includes translation mechanism, jaw opening and closing driving mechanism, left jaw and right jaw, jaw opening and closing driving mechanism is connected with translation mechanism, left jaw, right jaw is connected with jaw opening and closing driving mechanism, left jaw and / or right jaw is connected with limit plate, bunching device includes base, left stand, right stand, hollow bunching block, air pipe guide rod and air pipe guide rod support.The present application is widely used in infusion apparatus automatic winding packaging technical field.

The invention relates to a tip actuation system for a minimally invasive surgical instrument, comprising: a tip actuation system and an outer shaft, the tip actuation system being disposed at an end of the outer shaft remote from a user of the surgical instrument; the tail end actuating system comprises a gear mechanism, a jaw opening and closing mechanism, a staple cartridge actuating mechanism and a clutch mechanism. According to the tail end actuating system for the minimally invasive surgical operating instrument, the gear mechanism distributes rotary motion input from the outside to the jaw opening and closing mechanism and the nail bin actuating mechanism at the same time, and meanwhile the clutch mechanism controls the jaw opening and closing mechanism and the nail bin actuating mechanism to work according to the needed working sequence. In addition, the nail bin is disposable, the nail bin composition structure is simple, and the purpose of reducing cost can be achieved. In addition, due to the design of the nail bin loaded with the blade, the phenomenon of tissue edge deckle edge caused by sharp degree failure of the cutting blade can be obviously reduced.

The utility model discloses a limiting block matched with an endoscope, the limiting block is provided with a clamping groove, the clamping groove is clamped and fixed on a catheter of an acting piece, and the limiting block is limited at a jaw opening of the endoscope; the acting piece is a tool acting on internal tissues of a body through an endoscope, and the catheter is a part, penetrating through an insertion part of the endoscope, in the tool; the limiting device is fixed on a catheter of a tool (such as a soft tissue clamp, a pair of foreign body forceps or other workpieces which enter a body through an endoscope to act) in a clamping installation mode, and then the limiting block is limited at a jaw opening of the endoscope, so that the extension length of the catheter at the tail part of the insertion part is fixed; therefore, the medical staff can conveniently operate the target position in the body through the workpiece.

The application provides an electric endoscope anastomat device, and relates to the technical field of cutting anastomat. The device comprises a support, and further comprises: a jaw opening and closing transmission mechanism, which is installed on the support and is driven by a motor; a cutting knife feeding transmission mechanism, which is installed on the support and is in transmission connection with the jaw opening and closing transmission mechanism; and a rack locking mechanism, which is installed between the jaw opening and closing transmission mechanism and the cutting knife feeding transmission mechanism, and the jaw opening and closing transmission mechanism and the cutting knife feeding transmission mechanism are sequentially driven through the rack locking mechanism. Overall, the application has simple structure, is stable and reliable, and realizes two functions of jaw opening and closing and cutting knife feeding / retracting of the electric anastomat through a group of motors.

The invention discloses a surgical instrument which comprises a jaw assembly, a rack, a jaw opening assembly, a cutting knife driving part and a safety assembly. The safety assembly is arranged on the rack and has an unlocking state and a locking state, and in the unlocking state, the safety assembly is separated from the jaw opening assembly; in the locking state, the jaw opening assembly is locked; the cutting knife driving part is provided with an initial position and a knife retracting limit position, and when the cutting knife driving part is located at the initial position, the safety assembly is in an unlocked state; during cutter retracting, the cutter driving piece moves towards the near side to the initial position, and the safety assembly is driven to be switched to the unlocking state; in the process that the cutting knife driving piece moves from the initial position to the near end to the knife retracting limit position, the cutting knife driving piece acts on the safety assembly and enables the safety assembly to be kept in the unlocking state. When the jaw assembly is in the bending state, in the process that the rack retracts from the initial position to the near side, the safety assembly is kept in the unlocking state and does not interfere with the rack, and the retracting process can be smoothly completed.

Open-end wrench with an asymmetrically structured jaw opening, comprising a handle (10) and a head (20), wherein the handle (10) and the head (20) are connected to each other such that the head (20) is connected to one end of the handle (10), characterized in that an opening (20A), a load-bearing surface (21), two force-application surfaces (22), at least one rounded surface (23), at least one fixing surface (24), a plurality of deflection notches (25), and a clamping surface (26) are arranged on the head (20), wherein the load-bearing surface (21), the force-application surfaces (22), the at least one rounded surface (23), the at least one fixing surface (24), the deflection notches (25), and the clamping surface (26) are directed towards the opening (20A), wherein the load-bearing surface (21) faces the two force-application surfaces (22), wherein the two force-application surfaces (22) are a first force application area (221) and a second force application area.(222) wherein the rounded surface (23) is arranged between the fixing surface (24) and the first force application surface (221), wherein at least one of the avoidance notches (25) is arranged between the first force application surface (221) and the second force application surface (222), wherein one of the avoidance notches (25) is arranged between the second force application surface (222) and the clamping surface (26); and that the loaded surface (21) has a plurality of the avoidance notches (25).

The utility model discloses a pair of wire clamping pliers, which comprises a first plier head, a second plier head, a first handle and a second handle, the first handle is hinged and matched with the first plier head, the second handle is hinged and matched with the second plier head, and the first handle is hinged and matched with the second handle through a linkage pin. The pair of pliers is characterized by further comprising a side plier, a side-mounted pin shaft and a second side-mounted pin shaft, a first jaw is arranged on the first plier head, a second jaw is arranged on the side plier, one end of the side plier is matched with the first plier head and the first handle in a hinged mode, and the other end of the side plier is matched with the first handle in a hinged mode through the side-mounted pin shaft. Compared with the prior art, the wire clamping pliers have the following beneficial effects that the shearing clamp is formed between the side pliers and the first jaw, the whole wire clamping pliers do not need to be rotated when a cable is sheared, and the probability of breakage and fracture in the shearing process is relatively low.

Dental instrument comprising: a first shell-shaped body (10) configured to receive maxillary teeth and a second shell-shaped body (20) configured to receive mandibular teeth, wherein a buccal or lingual lateral surface of a posterior region of the first shell-shaped body (10) is provided with a first-type protrusion (11), a buccal or lingual lateral surface of a posterior region of the second shell-shaped body (20) is provided with a position limiting section (21) that interacts with the first-type protrusion (11), and the first-type protrusion (11) and the position limiting section (21) interact to establish a relative positional relationship between the maxilla and mandible;an occlusal surface of the posterior region of the first shell-shaped body (10) or the second shell-shaped body (20) is provided with a second-type protrusion (12) projecting towards an opposing jaw, and a protrusion height of the second-type protrusion (12) compensates for a jaw opening space formed by the interaction of the first-type protrusion (11) and the position limiting section (21) in the posterior region to stabilize an occlusal state.

The utility model discloses a clamp head opening and closing structure of a clip applier and a continuous clip applier, and belongs to the field of medical instruments. The tong head opening and closing structure of the clip applier comprises a guide rail, a pair of tong head arms capable of moving in an opening and closing mode and a U-shaped clamping spring, a clamping spring limiting part is arranged on the guide rail, clamping spring connecting parts are arranged at the tail portions of the tong head arms, the clamping spring limiting part is of an L-shaped limiting structure protruding out of the side wall of the guide rail, and a turning part of the U-shaped clamping spring is clamped on the L-shaped limiting structure. The clamping spring connecting part is a clamping hole which is laterally formed in the tail part of the plier head arm; and the buckling part of the U-shaped clamping spring is inserted into the clamping hole of the corresponding plier head arm. Relative displacement of the clamp spring in the using process can be effectively controlled, the problem that a U-shaped clamp spring is prone to falling off is solved, the risk of medical negligence in the operation process is reduced, and unnecessary loss is avoided. The structural design is simple, implementation is easy, the connection firmness of instrument parts and the opening and closing stability of the forceps heads are improved, and the use safety is improved.

The invention relates to the technical field of hardware tools, in particular to a novel movable socket spanner. The device comprises a sleeve connector, a limiting groove, a longitudinal deep opening, a fixed clamping jaw, an opening binding piece, a jaw opening, a displacement sleeve arm, a sliding plate, a force application rod, driving teeth and a displacement clamping jaw. The sleeve connector is cylindrical and vertically placed, the limiting groove is formed in the top face of the sleeve connector, the longitudinal deep opening is formed in the top face of the sleeve connector, the fixed clamping jaw comprises an opening binding piece and a jaw opening, the displacement sleeve arm comprises a sliding plate, a force application rod and driving teeth, the appearance of the sliding plate is the same as that of a groove opening of the limiting groove, and the jaw opening of the displacement clamping jaw and the jaw opening of the fixed clamping jaw are oppositely arranged. The displacement clamping jaw is fixedly mounted on the top surface of the sliding plate; the driving teeth are driven to drive the force application rod to move transversely, the distance between the displacement clamping jaw and the fixed clamping jaw is determined by the displacement direction of the force application rod, when the distance between the two clamping jaws is gradually reduced till the two clamping jaws are attached to the periphery of a nut to be twisted, the handle can be rotated to fix the nut, and operation is simple and rapid.

A breakout wrench (22) for a drilling rig (10) is disclosed. The breakout wrench (22) includes a wrench body (24), a first jaw (26, 32) operatively supported by the wrench body (24) and movable relative to the wrench body (24) by a first actuator (28), and a second jaw (26, 32) operatively supported by the wrench body (24) and movable relative to the wrench body (24) by a second actuator (28). The first jaw (32) includes a male jaw block (36) with a grip surface (40) and a female jaw block (38) with a grip surface (42). The second jaw (32) includes a male jaw block (36) with a grip surface (40) and a female jaw block (38) with a grip surface (42). A jaw opening (46) is defined between the first jaw (32) and the second jaw (32), and the first jaw (32) and the second jaw (32) are configured to mesh together to vary a size of the jaw opening (46).

The present invention discloses a tooling for adjusting the radial clearance of a bearing in a deep cavity and narrow space, which includes a first clamping arm and a second clamping arm hinged in an X shape. A clamping jaw opening driving mechanism is provided between the upper parts of the first clamping arm and the second clamping arm. The lower ends of the first clamping arm and the second clamping arm abut against the outer end face of the bearing and the adjacent fixed part on the shaft as the clamping jaw opens. The middle parts of the first clamping arm and the second clamping arm cross each other and are hinged to each other through a clamping arm shaft. The lower parts of the first clamping arm and the second clamping arm are the lower half rings of the first clamping arm and the second clamping arm with openings facing downwards. The outer sides of the two free ends at the lower parts of the lower half rings of the first clamping arm and the second clamping arm are respectively hinged with arc-shaped blocks of the first clamping arm and the second clamping arm. The concave parts of the two arc-shaped blocks of the first clamping arm and the second clamping arm face each other and match the shapes on both sides of the outer end face of the bearing. The axes of the lower half ring of the first clamping arm and the lower half ring of the second clamping arm are both perpendicular to the axis of the clamping arm shaft. This tooling can easily adjust the radial clearance of the bearing in a limited space, avoid harmful actions such as hammering, and extend the service life of the bearing.

The forceps head comprises a head outer shell and a head inner sleeve which is arranged in the head outer shell in a sleeved mode and provided with a bottom wall, an ultrasonic transducer is arranged in the head inner sleeve, a fixed jaw body is arranged at the top of the ultrasonic transducer, and the fixed jaw body is provided with an ultrasonic transducer. A movable jaw body is movably hinged to the head outer shell, a pair of traction lug plates is further arranged on the two sides of the movable jaw body, the traction lug plates are movably hinged to the head inner sleeve, and a jaw opening and closing traction rope stretching out of the head outer shell outwards is arranged on the bottom wall of the head inner sleeve. The dual-energy ultrasonic cutting hemostatic forceps comprise a hollow operating rod, an operating handle, two forceps head steering control mechanisms and a jaw opening and closing control mechanism are arranged at the rear end of the operating rod, and the forceps heads are arranged at the front end of the operating rod through the forceps head steering mechanisms. The dual-energy ultrasonic cutting hemostatic forceps can be widely applied to minimally invasive surgery.

The mucous membrane traction device for the endoscopic surgery comprises a far-end traction part, a near-end operation part and a connecting lead, the far-end traction part comprises an installation ring and a traction piece, and the installation ring is used for being arranged at the other end of an insertion tube in a sleeving mode; a mounting groove is formed in the mounting ring, and the traction piece is arranged in the mounting groove; the traction piece comprises a connecting block, a first clamping block and a second clamping block, and the first clamping block and the second clamping block are rotationally connected, so that the first clamping block and the second clamping block can be relatively opened and closed like a forceps clip structure, and the function of clamping the mucous membrane is achieved; the two sides of the connecting block are slidably connected with the two sides of the mounting groove. A first through hole is further formed in the mounting ring; a first adjusting line, a second adjusting line and a third adjusting line in the connecting lead are correspondingly connected with the connecting block, the first clamping block and the second clamping block respectively, and the other ends of the adjusting lines penetrate out of the mounting ring through the first through hole, enter the jaw opening and are connected with the near-end operation part.

The invention belongs to the technical field of ultrasonic knives, and particularly relates to an ultrasonic knife, a controller and a jaw opening degree and jaw pressure detection method. The cutter bar assembly comprises a cutter body, a trigger sleeve and a mounting sleeve, wherein the trigger sleeve and the mounting sleeve are sequentially arranged in a sleeving mode. Wherein a jaw is hinged to the front end of the mounting sleeve, a driving arm of the jaw is connected with the trigger sleeve, and the trigger sleeve is connected with the sliding block, so that the trigger sleeve is driven by the sliding block to slide, and the jaw is driven to be attached to the cutter body to complete closing of the jaw; a displacement sensor is arranged on the side wall of the mounting sleeve, a detection ring is arranged on the side wall of the triggering sleeve, the detection ring is suitable for being detected by the displacement sensor so as to detect the displacement distance of the triggering sleeve and transmit the displacement distance to the controller, and the closing state of the jaw is judged through the controller; the displacement distance of the trigger sleeve is detected through the displacement sensor, and the rotation amount of the jaw is judged through the controller, so that the closing state of the jaw is judged.

The invention discloses multi-degree-of-freedom angle-rigidity-adjustable handheld release forceps for arthroscopic surgery, which comprise a handheld operating device, a continuous body section and release forceps, the handheld operating device and the release forceps are respectively mounted at the head end and the tail end of the continuous body section, and the handheld operating device comprises a shell, a connecting rod and a connecting rod, the up-down bending driving assembly is mounted in the shell; the left-right bending driving assembly is mounted in the shell; the jaw opening and closing driving assembly is installed at the bottom of the shell, and the jaw opening and closing driving assembly is used for controlling the opening and closing angle of the loosening pliers; wherein a locking assembly is installed in the shell, and the locking assembly is in limiting fit with the up-down bending driving assembly and the left-right bending driving assembly. The device can adapt to a complex anatomical structure of an articular cavity, flexibly reach the position of a view blind area and keep precision and stability in surgical operation, so that the surgical efficiency is improved, and wounds of a patient are reduced.

The utility model discloses a compact type high-precision large-stroke multi-point centering electric clamping jaw which comprises a shell, a containing inner cavity is formed in the shell, n horizontal sliding grooves communicated with the containing inner cavity respectively are formed in the upper portion of the shell, n is a natural number larger than or equal to 2, an opening and closing clamping jaw is connected into each horizontal sliding groove in a sliding mode, and the opening and closing clamping jaw is connected with the containing inner cavity in a sliding mode. The clamping jaw opening and closing driving unit is arranged in the containing inner cavity and comprises a middle pushing sliding block, a lead screw body and a rotating power source. The lower portion of the opening and closing clamping jaw is provided with a stroke guide groove and a stroke limiting rod. Tooth-shaped guide grooves are formed in the two side walls of the horizontal sliding groove, tooth-shaped guide columns are arranged on the outer side walls of the opening and closing clamping jaws respectively, the tooth-shaped guide columns extend into the tooth-shaped guide grooves, and gaps are formed between the bottoms of the opening and closing clamping jaws and the bottom of the horizontal sliding groove. Compared with the prior art, the utility model has the advantages of compact integral structure, small volume, large stroke, high sliding precision of the opening and closing clamping jaw and good sliding smoothness.

The utility model belongs to the technical field of medical instruments, and particularly relates to a clip applier head mechanism with a limiting device and a continuous clip applier applying the clip applier head mechanism. The utility model provides a clip applier head mechanism with a limiting device, which aims at solving the problem that in the prior art, a clip applier clamp is easy to age, the opening angle is too large, and the clip applier cannot normally clamp the clamp, and comprises the clip applier, a sliding sleeve and a push rod, the push rod pushes the sliding sleeve to slide, and the sliding sleeve extrudes the clip applier to enable the head of the clip applier to be opened and closed; the forceps holder fixing device comprises a forceps holder fixing sleeve which is parallel to one side of the opening and closing direction of the forceps holder and is tightly attached to the forceps holder, the forceps holder fixing sleeve is connected with a limiting mechanism, and the limiting mechanism limits the outward expansion trend of the forceps holder in the maximum clamping state and ensures that the forceps holder can stably clamp the forceps holder. The utility model further provides an integral scheme of the running clip applier applying the clip head mechanism.

The utility model discloses an opening and closing clamping mechanism and a lifting clamping transfer mechanism, which comprise an opening and closing mounting base plate, clamping jaw structures and an opening and closing power structure, at least one clamping jaw structure is mounted on the lower end face of the opening and closing mounting base plate, and each clamping jaw structure comprises a clamping jaw I and a clamping jaw II; the opening and closing power structure comprises an opening and closing moving base plate, an opening and closing moving power piece and a clamping jaw opening and closing connecting column set. The moving direction of the opening and closing moving base plate is perpendicular to the sliding direction of the clamping jaw structure. At least one opening and closing sliding groove set is formed in the opening and closing moving base plate, and each opening and closing sliding groove set comprises an opening and closing sliding groove I and an opening and closing sliding groove II. The inclination directions of the opening and closing sliding groove I and the opening and closing sliding groove II are opposite. Clamping of the fire extinguisher is changed into driving through the opening and closing moving base plate provided with the splayed opening and closing sliding groove structure, the effect that the multiple clamping jaws are driven to be opened and closed at a time can be achieved through the opening and closing moving base plate, and the fire extinguisher transferring efficiency is improved.

The invention relates to the technical field of oral medical instruments, in particular to a joint jaw position retainer and a manufacturing method thereof, and the method comprises the following steps: acquiring a lower jaw movement discrete point set during jaw opening and closing movement; the lower jaw movement discrete point set is fitted to generate a guide curve, the guide curve is segmented according to the tooth point rotation angle, a preset number of sub-curves are obtained, the arc length of each sub-curve is monotonically decreased in the jaw opening direction, and the tooth point rotation angle is an included angle formed by the starting point and the ending point of the guide curve with the condylar process center as the circle center; the sub-curves are correspondingly manufactured into guide rails, the guide rails are sequentially connected in series and connected in a sleeved mode according to the connection sequence of the sub-curves in the guide curves to form the guide telescopic assembly capable of stretching and retracting in the axial direction, the mandibular movement is restrained within the normal jaw opening and closing movement track range, and the necessary movement freedom degree is guaranteed while the disc-condyle relation is stabilized.

A clamp includes a first clamp body and a second clamp body, which intersect and are fastened by a pivot mechanism, form a jaw opening at one end of a pivot mechanism, and have respective handles at the other end of the pivot mechanism. A stop mechanism is disposed on the first clamp body and an anti-pinch flange is disposed at a position, corresponding to the protruding stop mechanism, on the second clamp body to prevent the two handles of the first clamp body and the second clamp body from further closing.

The invention provides an insulator string detection device. The insulator string detection device comprises two side clamping jaw assemblies arranged along a first direction; the first driving mechanism is matched with the clamping jaw assemblies on the two sides and arranged to be controlled to drive the clamping jaw assemblies on the two sides to move in the first direction so as to adjust the distance; the clamping jaw assembly on each side comprises two side clamping jaw structures arranged in the second direction, the clamping jaw structure on each side comprises a supporting part and a clamping jaw part, clamping jaw openings of the clamping jaw parts of the clamping jaw structures on the two sides are opposite in the second direction, and the second direction is perpendicular to the first direction; and the second driving mechanism is connected with the supporting parts of the clamping jaw structures on the two sides, and is controlled to drive the clamping jaw parts in the clamping jaw structures on the two sides through the supporting parts to move oppositely to the clamping state and move away from the clamping jaw structures to the opening state. According to the embodiment, the automation degree of insulator chain detection is high, manual operation is greatly saved, and the safety and the detection efficiency of insulator chain detection are improved.

The invention discloses an electric control device for an endoscope treatment instrument to enter and exit a jaw opening, which comprises a main body control device and a pedal control device, and is characterized in that the main body control device is detachably mounted on an endoscope; the main body control device is in wireless communication connection with the pedal control device; the main body control device comprises a triangular shell, roller mechanisms, an operation panel, a control panel I and a storage battery I, the right side of the top surface of the triangular shell is provided with two roller mechanisms used for controlling a therapeutic instrument to enter and exit from a jaw opening, and the roller mechanisms are controlled by a pedal control device to rotate forwards or backwards; the operation panel is arranged on the top face of the triangular shell, and the first control panel and the first storage battery are arranged in the triangular shell. The roller mechanism and the operation panel are electrically connected with the first control panel. The device is characterized in that another'hand 'for controlling the instrument is added for a surgeon through the device, so that the endoscope surgeon can accurately deliver the surgical treatment instrument to a diseased region needing to be operated in an electric control mode.

A cap screwing manipulator comprises a mounting seat which comprises a fixed part and a rotating part rotationally connected in the fixed part; a rotation drive unit; the clamping jaw seat is fixed at the lower end of the rotating part; the lifting driving part is fixedly connected to the upper end of the fixing part, a lifting driving link rod is connected to a driving shaft of the lifting driving part, and the lifting driving link rod extends into the clamping jaw seat and is connected with a fixing sleeve; the clamping jaw assembly is located in the clamping jaw seat, and the clamping jaw assembly comprises a plurality of connecting rod assemblies; and a mandrel. The mechanical arm is compact and reasonable in structure and convenient to operate, flexible adjustment of the opening degree of the clamping jaws is achieved through the ingenious design of the connecting rod assembly and the fixing sleeve, the adaptability of the mechanical arm is improved, and the application range of the mechanical arm in a compact production line is widened. Meanwhile, the connecting rod assembly and the air cylinder drive replace a traditional rubber ring, the synchronism of the clamping jaws is improved, the service life of the clamping jaws is prolonged, and the defective rate and the maintenance cost in the production process are reduced.

The utility model provides a board card fixing device. The board card fixing device comprises a fixing support, a board card support and a wrench, wherein the board card support is assembled on the fixing support in a sliding mode in the first direction, and the wrench is hinged to the board card support. The head of the wrench is provided with an inner jaw, an outer jaw and a jaw opening, the inner jaw and the outer jaw are arranged at an interval, the jaw opening is defined by the inner jaw and the outer jaw, the fixing support protrudes towards the wrench to form a clamping part matched with the jaw opening, and the plate clamping support is further provided with a limiting part; when the wrench rotates around the hinge shaft to a first position, the opening direction of the jaw opening is opposite to and parallel to the protruding direction of the clamping part, and in the first direction, the projection of the jaw opening and the projection of the clamping part are at least partially overlapped; when the wrench rotates around the hinge shaft to a second position, an included angle is formed between the opening direction of the jaw opening and the protruding direction of the clamping part, the side, away from the inner jaw, of the outer jaw abuts against the limiting part, and in the first direction, the projection of the clamping part is between the projection of the inner jaw and the projection of the outer jaw. And the wrench rotates around the hinge shaft, so that the locking of the board card bracket is skillfully completed, and the reliability of the device is greatly improved.

A breakout wrench for a drilling rig is disclosed. The breakout wrench includes a wrench body, a first jaw operatively supported by the wrench body and movable relative to the wrench body by a first actuator, and a second jaw operatively supported by the wrench body and movable relative to the wrench body by a second actuator. The first jaw includes a male jaw block with a grip surface and a female jaw block with a grip surface. The second jaw includes a male jaw block with a grip surface and a female jaw block with a grip surface. A jaw opening is defined between the first jaw and the second jaw, and the first jaw and the second jaw are configured to mesh together to vary a size of the jaw opening.

The invention discloses a brake mechanism, comprising a first caliper body, a second caliper body, a first pin shaft, an elastic member and a driving device; the first caliper body and the second caliper body are hinged by the first pin shaft; the first caliper body is provided with a first clamping part, the second caliper body is provided with a second clamping part, the first clamping part and the second clamping part are arranged oppositely to form a jaw; the elastic member is arranged between the first caliper body and the second caliper body to reduce the jaw opening; the driving device is arranged between the first caliper body and the second caliper body to increase the jaw opening. The brake mechanism has the advantages of simple structure, reliable working performance and the like.

The utility model discloses a kind of opening and closing clamping mechanisms, including reciprocating movement structure, clamping jaw opening and closing base plate and two clamping jaw structures, every described clamping jaw structure includes clamping jaw connecting rod, clamping jaw opening and closing slider, clamping jaw opening and closing slide rail and clamping jaw;Clamping jaw connecting rod one end is hinged with the moving part of reciprocating movement structure;The other end of clamping jaw connecting rod is hinged on clamping jaw opening and closing slider, and clamping jaw is fixed on clamping jaw opening and closing slider;Clamping jaw opening and closing slider is slidably arranged on clamping jaw opening and closing slide rail, and clamping jaw opening and closing slide rail is installed on clamping jaw opening and closing base plate;The clamping jaw connecting rod of two clamping jaw structures is symmetrical about the axis of reciprocating movement structure.The clamping jaw of use mechanical structure can be replaced separately, and the spacing of clamping can be changed, compared with using cylinder clamping jaw structure, clamping is tighter and the cost of replacement maintenance is lower.The utility model uses connecting rod type clamping jaw opening and closing to provide the clamping jaw structure of higher clamping degree, and clamping jaw opening and closing uses bearing guide rail type cooperation structure, and is not afraid of dust.