87results about How to "Good anti-rotation performance" patented technology

The invention provides an image matching method and an image matching device. The image matching method comprises the following steps: cutting a standard image; loading the image into a template image; carrying out binaryzation processing on the image; determining positions and quantity of candidate match points; moving a template to one certain candidate match point; setting a searching window and setting the circle center of the searching window to be a pixel point of a geometrical center of the template in a standard image; setting a radius to a pixel number; roughly matching gray values of all the pixel points according to a set value M and finding a matched position through a cross-correlation method based on convolution; judging whether the matched position is found or not; if not, moving the template to the other candidate match point of the standard image; if so, outputting coordination information of the matched position. The image matching device comprises an image acquisition unit, an image storage unit, an image processing unit and a data outputting unit. According to the image matching method and the image matching device, the influences caused by gray information variation, illumination variation and noises are reduced; the image matching speed, the matching accuracy and the rotation resistance are improved.

The invention discloses a steel wire rope for a rotary drilling machine and a preparation method thereof. The steel wire rope is a fully pressed solid-strand steel wire rope by twisting three layers of strands around a central strand; each strand is formed by twisting 6 outer-layer steel wires around a central steel wire; the steel wires on the outer layer are approximately trapezoid; the central steel wire is approximately hexagonal; and steel wires in the strands are in surface contact with the steel wires, wherein the twist direction of strands of the steel wire rope on the outer layer is opposite to the twist direction of strands on two inner layers, and oil is filled in the steel wire rope. In the preparation method of the steel wire rope for the rotary drilling machine of the invention, cold drawing is performed on steel wire rope strands by using a die when the strands are twisted by utilizing a production mode of die drawing, the shape of the steel wires in the strands is changed but the cross section area of the steel wires is basically not changed to ensure that the steel wires in the rope strands are in surface contact with the steel wires, and stranding is performed; and simultaneously a mode of spraying oil on the strands and allowing the steel wire rope to pass through an oil pan is adopted during the production. Compared with those of the prior art, the wear resistance, the fatigue resistance, the rotation resistance and the entire tensile force of the steel wire rope for the rotary drilling machine are all remarkably improved.

The invention discloses a sisal hemp core steel wire rope for a high-speed elevator, which comprises a sisal hemp core and an outer layer strand, wherein the outer layer strands wrap and are twisted on the outside of the sisal hemp core uniformly. The outer layer strands comprise 8 steel wire strands each of which has a seal type structure, a central steel wire is arranged in the middle of the outer layer strands, the inner layer of the outer layer strands consists of 9 thin steel wires which wrap and are twisted on the outside of the central steel wire uniformly, and the outer layer of the outer layer strands consist of 9 thick steel wires which wrap and are twisted on the outside of the inner layer uniformly. The invention also discloses a method for preparing the sisal hemp core steel wire rope for the high-speed elevator, which comprises: preparing the sisal hemp core, preparing the outer layer strands and combining to make the rope. The sisal hemp core steel wire rope for the high-speed elevator is uniform in diameter, high in torsion resistance and long in service life.

The invention discloses a high-load-bearing steel wire rope and a producing method thereof. The steel wire rope is prepared by that an outer strand, a filling strand and an inner strand are wrapped on a central strand through twisting, a surface contact state is formed between steel wires and between strands in the steel wire rope, the twisting directions of the outer strand, the filling strand and the inner layer are leftward, the twisting direction of the central strand is rightward, the strand lay lengths of the outer strand and the inner strand are 7.5-7.8 times as large as the strand sizes thereof, the strand lay lengths of the central strand and the filling strand are 6.4-6.6 times as large as the strand sizes thereof, the outer strand, the filling strand and the inner strand are wrapped on the central strand, the twisting direction of the rope is rightward, the inner and outer strands are same in lay length and twisting direction, and the lay lengths are 6.3-6.5 times as large as the diameter of the rope. Compared with a common round strand wire rope with a diameter same as that of the steel wire rope disclosed by the invention, the wear resistance of the steel wire rope is increased by nearly 30%, the impulse load resistance and the rotating resistance are increased, and the bearing capacity can be increased by 28.4%.

The invention relates to a TLD target tracking method based on a circle projection matching algorithm. A tracking module, a detection module and a learning module are comprised. The method comprises steps that initialization selection of a target zone from a first image is carried out, and the target zone information is acquired; the target tracking result is determined by the tracking module according to target zone information prediction of a previous image; global traversal of the present image is carried out by the detection module to acquire to-be-selected targets; the circle projection matching algorithm is employed by the detection module to screen the to-be-selected targets to acquire the target detection result; a target tracking zone is determined according to the target tracking result and the target detection result; the target tracking zone is inputted to the learning module for learning. The method is advantaged in that rotation resistance is greatly improved, calculation amount is relatively small, the algorithm is simple, and timeliness of the TLD algorithm is further improved.

The invention relates to a steel wire rope for a nacelle and a manufacturing method thereof. The steel wire rope is in a seale type structure, the external surface of the steel wire rope is in a sector shape, and the steel wire rope comprises four upper strands and one synthetic fiber core, wherein the four upper strands are symmetrically twisted on the synthetic fiber core, and the sector surface is outward. The preparation method comprises the following steps: firstly, twisting a light-gage steel wire on one synthetic fiber core to form an initial lower strand, and sequentially and symmetrically winding a light-gage steel wire and a heavy-gage steel wire in a seale type on the outer layer of the initial lower strand to form the upper strand; then twisting four upper strands on one synthetic fiber core into a rope to form the product, namely, the steel wire rope for the nacelle; and extruding steel wire rope for the nacelle into a sector shape by two groups of orthogonal sizing tools during rope twisting. The four steel wire ropes with different shapes provided by the steel wire rope for the nacelle and the manufacturing method thereof of the invention have good rotation-resisting performance and basically realize no rotation of the steel wire ropes, a sector strand has a large contact surface with a pulley and good wear resistance, and by tightening a deformed steel wire rope, the breaking force is improved by one level compared with a round strand steel wire rope at the same level.

The invention discloses an anti-rotation hollow screw, which comprises a hollow screw body. A plurality of first through holes is arranged on the outer side wall of the hollow screw body, an inner core is inserted into the hollow screw body, second through holes are respectively disposed on each of the inner core sidewalls corresponding to each of the first through holes, guide rods are disposed on the inner wall of the inner core, and one side screw is respectively mounted on each of the guide rods, and the side screw includes a turbine end and a self-drilling self-tapping screw head. a guiding hole is arranged in a middle portion of the turbine end, a guiding rod is inserted into the guiding hole, a plurality of turbine teeth are arranged outside the turbine end, a threaded tooth havinga helical structure is arranged on a worm corresponding to the thread tooth groove position, an adjusting block is arranged at one end of the worm near a head of the hollow screw body; a lower bearingand an upper bearing are respectively embedded in a lower bearing groove and an upper bearing groove, a sealing cover is embedded in the upper bearing groove above the upper bearing, and limiting blocks inserted into a clamping slot are symmetrically disposed on both sides of the outer wall of the inner core; the adjusting block is connected with a wrench, and the head of the hollow screw body isprovided with a limit cover.

The invention discloses a steel wire rope and a producing method thereof. The steel wire rope is prepared by that strands are wrapped on a central strand through twisting, the strands include an inner strand, a secondary inner strand and an outer strand, a surface contact state is formed between steel wires and between strands in the steel wire rope, the twisting directions of the inner strand and the secondary inner strand wrapped on the central strand are leftward, the lay lengths are 5.9-6.2 times as large as the diameter of a central sub rope, the twisting direction of the outer strand wrapped on the central sub rope is rightward, and the lay length is 6.8-7.1 times as large as the diameter of the steel wire rope. By using the matching of the lay lengths and twisting directions of the rope and the strands, the torques of the inner and outer layers of the steel wire rope are mutually offset, thereby improving the rotating resistance of the steel wire rope; and the steel wire rope is subjected to strand extrusion and rope extrusion, so that the bearing capacity and fatigue resistance of the steel wire rope are improved.

A sea anchor comprising a frame, a body and an attachment member. The frame includes a base ring and an opposing ring spaced apart therefrom, and a plurality of ribs extending between the base ring and the opposing ring, and a plurality of lead lines extending from the base ring away from the opposing ring. The body comprising a covering that extends between the opposing ring and the base ring. The attachment member is attached to the lead lines and facilitates attachment of the sea anchor to an outside boat line.

The invention discloses a biological fixation type tibia platform for surgery implants. The biological fixation type tibia platform is composed of a platform body and an intramedullary rod. A biological coating adheres to the lower surface of the platform body, and thorn-shaped protrusions are arranged on the platform body which facilitates initial fixation of the platform. The intramedullary rod is connected with the platform through a conical structure, the biological coating adheres to the upper portion of the intramedullary rod, and spine-shaped structures which are evenly distributed are arranged on the columnar face of the lower portion of the intramedullary rod. A prosthesis can be conveniently inserted into the bone, meanwhile, the anti-rotation function is provided, and the biological fixation type tibia platform can still be firmly fixed under the action of rotation force. The biological fixation type tibia platform can provide immediate fixation after an operation, the good anti-rotation function is achieved, and due to different combination modes, the biological fixation type tibia platform meets the requirements of different patients.

The invention discloses a light rotating anti-slip scaffold steel pipe buckle assembly which comprises a left buckle (1) and a right buckle (2) having the same shape and structure. The left buckle andthe right buckle are riveted by rotating in the back to back mode through a center shaft (3). The big end of the left buckle is in rotating rivet connection with a left hasp (5) through a long rivet(4), the big end of the right buckle is in rotating rivet connection with a right hasp (6) through a long rivet, the small ends of the left buckle and the right buckle are in rotating rivet connectionwith one end of a fastening bolt (8) through a short rivet (7), and the other end of the fastening bolt (8) is connected with a U-shaped bayonet (10) on the hasp via the nut (9). The pressing surfaces of the left buckle (1), the right buckle (2), the left hasp (5) and the right hasp (6) with a steel pipe (11) are respectively provided with engaging teeth (12). The assembly has the advantages of simple structure, small size, lightness and attractive appearance, and has an anti-corrosion effect. The toothed surface increases the pressure, so that the rotation of the steel pipe is greatly reduced, and the construction safety is improved.

The invention provides an orientation-adjustable platform-transferred high-stability nuclear-shaped abutment, and belongs to the technical field of dental restoration. The abutment comprises an abutment body, the abutment body comprises a first conical part, a protruding part, a second conical part, a limiting part and a positioning part which are sequentially connected, and the first conical part is used for increasing the contact area with teeth. The convex part is used for increasing horizontal compensation so as to reduce a contact gap with an implant, the second conical part is attached to the inner side of the implant, the limiting part is embedded into the implant, and the positioning part is used for being inserted into the implant so as to achieve alignment of the abutment body. Compared with the prior art, the embodiment of the invention can greatly improve the connection firmness between the tooth and the implant, and has the advantages of adjustable abutment orientation, accurate alignment, simple structure and convenient operation.

The invention provides a hip joint prosthesis. The hip joint prosthesis comprises a hip joint handle and a bionic joint capsule, and a ball head is connected to the lower end of the hip joint handle and matched with a socket to form a joint friction matching pair; the bionic joint capsule is a bowl-type capsule, a center hole is formed in the top of the bionic joint capsule, hip joint handle is sleeved with the bionic joint capsule and fixedly connected with the bionic joint capsule, and the periphery of a bowl opening is attached to the top surface of the socket and fixedly connected with the top surface of the socket. According to the designed hip joint prosthesis, a plurality of grooves are additionally formed in the hip joint handle, so that mechanical properties are met well, the service life of the hip joint prosthesis is prolonged, the implantation comfort level of the hip joint prosthesis is improved, and stability and anti-rotation performance after the prosthesis is implanted are improved.

The invention discloses a parallel steel wire finished rope stretching device with anti-twisting structures. The device comprises a stretching device consisting of a pull rope anchor head, an anchor cushion plate, support feet, a working nut, an inner bushing, a stretching rod, a jack and a stretching nut, and one or two anti-twisting structures; the anti-twisting structure I comprises a rotatingstop body, a rotating stop slide block and a guide base; the rotating stop body is fixed at a piston ejecting part of the jack; the guide base is fixed on a cylinder block of the jack; the rotating stop slide block is positioned between the rotating stop body and the guide base, and can move up and down along with a piston of the jack; a Huff nut of the anti-twisting structure II is screwed with athin Huff nut through threads of the stretching rod; one end of the rotating stop arm is fixed on the two sides of the Huff nut through screws; and the other end of the rotating stop arm is joined ona support foot stand column, and can slide along with ascending or descending of the stretching rod. The stretching device is adopted to implement an anti-twisting stretching construction method, canachieve the anti-twisting purpose of tools in the stretching or tensioning construction process of parallel steel wire finished inclined pull ropes, and achieves higher construction efficiency.

The invention relates to the technical field of hip joint repairing surgery, in particular to a winged eccentric acetabular cup prosthesis. The winged eccentric acetabular cup prosthesis comprises anouter acetabular cup and an inner acetabular cup and is characterized in that the outer acetabular cup has a semispherical outer surface, and the semispherical outer surface of the outer acetabular cup is provided with three wings; the inner acetabular cup is provided with a semispherical inner cavity, and the sphere center of the semispherical inner cavity and the sphere center of the semispherical outer surface are staggered from each other; a plurality of limit mechanisms are evenly distributed at the edge of the inner wall of the outer acetabular cup, and a plurality of positioning mechanisms are evenly distributed at the edge of the outer wall of the inner acetabular cup. The winged eccentric acetabular cup prosthesis has the advantages that acetabular bone defect repairing is prevented from using traditional methods such as padding and bone grafting, the contact interface problem between a pad and an acetabular cup is avoided, the absorption problem of bone grafting is solved, complete contact between a host bone and the surface of the acetabular cup is achieved, the contact area and bone growth area of the prosthesis and the host bone, and the three wings increases the contact area of the acetabular cup and the host bone to a large extent and guarantees the initial stability of the acetabular cup.

The invention relates to an anti-loosening radio frequency coaxial connector. The anti-loosening radio frequency coaxial connector comprises a casing, wherein the casing is internally provided with a pin and is externally provided with a thread sleeve, the casing comprises a first casing and a second casing, one end of the first casing is provided with a loop of first projections circumferentially, one end of the second casing is provided with a loop of first grooves circumferentially, the first projections and the first grooves are mutually matched, the thread sleeve is sleeved at an outer wall of a connection portion of the first casing and the second casing, a chamber formed by the casing and the pin is provided with an insulator, stop rotation holes are oppositely arranged between contact faces of the insulator and the second casing, the stop rotation holes are internally provided with stop rotation nails, and the stop rotation nails comprise stop rotation nail heads. The anti-loosening radio frequency coaxial connector has a simple structure, can effectively prevent the insulator in the radio frequency coaxial connector from rotating relatively, prevents loosening, excellently guarantees safety and prolongs service life.

The invention discloses an ulna coronal process prosthesis device and a mounting machine and mounting method of the coronal process prosthesis device. The ulna coronal process prosthesis device comprises a coronal process prosthesis, an ulna implantation bolt and a locking screw, wherein the mounting machine of the ulna coronal process prosthesis comprises a guide seat, a C-shaped fixing arm, a threaded casing pipe, a positioning column drilling casing pipe and a kirschner wire casing pipe. According to the ulna coronal process prosthesis device as well as the mounting machine and mounting method thereof, a system for ulna coronal process replacement surgery is formed, the mounting problems of positioning, drilling, fixing and the like of the ulna coronal process prosthesis are well solved, and the mounted ulna coronal process prosthesis is good in stability and anti-rotation capacity and high in reliability. The treatment time of the patient with the ulna coronal process fracture is shortened, the treatment pain of the patient is reduced, and a new choice is provided for treatment of the patient with the coronal process comminuted fracture.

The invention relates to a dental implant, which comprises a dental implant body (1), a retaining abutment (2) and a false tooth (3). The dental implant is characterized in that a through hole (4) is formed in the head of the retaining abutment (2), wherein a spring (5) is arranged in the through hole (4); a sliding block (6) is arranged at each of the two ends of the spring (5); grooves (10) for arranging the spring (5) are formed in the sliding blocks (6); embedding grooves (7) for arranging the sliding blocks (6) are formed in the false tooth (3); the dental implant body (1) is a porous tantalum part with porosity of 60 to 70 percent, and consists of a neck (11), a middle (12) and a tail (13); an ordinary thread (14) is formed on the outer surface of the middle (12); a penetration hole (8) which is vertically through is formed in the dental implant body (1); a flow guide groove communicated with the penetration hole (8) is formed in the bottom end face of the dental implant body (1). According to the dental implant, the retaining abutment is closely connected with a dental crown, the dental implant body and an alveolar bone, and the dental implant is reasonable in structure and high in biocompatibility.

The invention discloses a medical internal fracture fixation needle and a medical fracture fixation tool. The medical internal fracture fixation needle is made of biodegradable magnesium or magnesiumalloy materials, and comprises a needle head, a needle body and a needle tail, wherein the needle head is conical so that an internal fixation needle can be inserted into a bone hole; the needle bodyis cylindrical, and a clamping structure is arranged on the needle body, and is used for achieving locking of the needle body after the internal fixation needle is inserted into the bone hole; multiple tail vane structures arranged at intervals are arranged on the surface of the needle tail, the ends, away from the needle tail, of the tail vane structures are pointed, so that the tail vane structures are inserted into the bone hole to achieve the anchoring effect, and a sliding groove for achieving the guiding effect is formed between every two tail vane structures. By means of the medical internal fracture fixation needle and the medical fracture fixation tool, the discomfort of a patient in the application process is reduced while a fixation operation can be conveniently carried out on the patient, and a second operation is avoided; as a degradation product of magnesium and magnesium alloy is alkalescency, stem cells can be better differentiated into osteoblast, generation of new bones is facilitated, and fracture healing is promoted.

The invention discloses a locking power type bracket inner fixing device. The device comprises rods, nails and blocks. Knurls are longitudinally arranged on the surfaces of the rods, the nails comprise locking screws, locking nuts and pressurizing screws, and the blocks are connecting blocks making the rods and the nails locked and connected; locking screw holes and pressurizing locking holes in the shape of Arabic number 8 are formed in the surfaces of bodies of the connecting blocks; the blocks comprise the sliding block, the end block, the anatomic block and the hook block; the locking screws and the locking nuts can be placed into the pressurizing locking holes in the shape of Arabic number 8 and the locking screw holes respectively to make the rods and the nails locked and connected;the pressurizing holes are in a spherical concave shape, slotted gasket rings are arranged in the locking screw holes, and the slotted gasket rings are matched with spherical faces of the inner wallsof the locking screw holes and matched with the longitudinal knurls on the surfaces of the rods. The low-profile design is used, the connecting structure and function mechanism of the nails and the blocks are innovatively designed, and the design of the pressurizing locking holes in the shape of Arabic number 8 is used in fixing nail connection, so that the overall structure and performance of thedevice are good in operability and practicability.

The invention provides a hip joint prosthesis. The hip joint prosthesis comprises a hip joint handle and a bionic joint capsule. The lower end of the hip joint handle is connected with a ball head, and the ball head and a joint are matched to form a joint friction matched pair; a joint cavity is formed between the ball head and the joint; a metal joint is arranged on the outer layer of the joint in a matched mode, and conical protrusions are attached to the surface of the metal joint; grooves are formed in the hip joint handle. Due to the arrangement of the grooves and the conical protrusions, the mechanical property of the hip joint prosthesis can be well met, the service life of the hip joint prosthesis can be prolonged, the implantation comfort of the hip joint prosthesis can be improved, and the stability and anti-rotation performance of the hip joint prosthesis after the hip joint prosthesis is implanted are improved.

The invention discloses a tooth implantation structure. The tooth implantation structure comprises an implantation body, a fixing drill base and false teeth, wherein the fixing drill base is providedwith a crash pad, the crash pad is provided with the false teeth; the lower portion of the fixing base is in threaded connection with a threaded rod, the threaded rod is matched with a threaded hole formed in the implantation body; the whole structure is simple, the implantation body and the fixing drill base are connected integrally by bonding or welding, the connecting methods of the implantation body and fixing drill base are simple, the connection is firm and reliable, the whole force receptivity is good, and the production is convenient; one end of a connecting rod is fixed on the fixingdrill base, and the other end of the connecting rod is fixed at a closed end of the bottom face of the implantation body, so that the close contact between the structure and the implantation body is achieved, and the fixing and stable effects are achieved; the crash pad is arranged between the false teeth and the fixing drilling base, and the distribution of the upper jaw force of the dentition can be adjustable, so that the periodontal traumatism is avoided, the load of artificial implant tooth can be reduced, and the service life of the artificial implant tooth is prolonged; holes are further formed in the false teeth and the fixing drill base, so that the false teeth and the fixing base can be in embedded connection to prevent the artificial implant tooth from falling off.

The invention discloses a multi-strand wire rope. The multi-strand wire rope comprises 12 outer strands and 1 metal core. The outer strands are uniformly arranged on the periphery of the metal core which comprises a metal core outer layer formed by 4 main strands and 4 filling strands and a metal core inner strand. Each of the outer strands is composed of 17 to 21 steel wires. The main strands and the filling strands are arrayed on the outer periphery of the metal core inner strand, and the main strands and the filling strands are arranged at intervals. The multi-strand wire rope has very good flexibility and suitable for being used in places with complex pulley systems. The wire rope of the structure is good in twisting and rotation resistance stability, and when the wire rope is applied to the places with complex pulley systems, stress contact planes between the wire rope and pulley grooves are larger than those between a prior wire rope and the pulley grooves, elliptical stress planes are formed by the wire rope in the pulley grooves, and a plurality of contact points exist between the wire rope and the grooves, so that contact pressure between the circumference of the wire rope and a push portion can be reduced furthest, and abrasions to key portions of the wire rope are reduced.

The invention relates to a near-end side-by-side dual-screw type proximal femoral nail. The near-end side-by-side dual-screw type proximal femoral nail comprises a femoral nail main nail, two near-endhead and neck screws and a far-end lock nail, wherein the femoral nail main nail comprises a near-end part, a transition part and a far-end part; a near-end screw passage allowing the two near-end head and neck screws to be mounted side by side is formed on the near-end part, and a far-end screw passage cooperating with the far-end lock nail is arranged on the far-end part; an inner lock nail forfixing the near-end head and neck screws is also in screw connection to the end of the near-end part; and an internal thread hole cooperating with the inner lock nail is formed in the near-end part and is sealed through a tail cap. Through the two near-end head and neck screws arranged side by side on the near-end part, the femoral nail has good screwing resistance, can effectively antagonize inversion trend of femoral head and neck fracture fragments, and can reduce stress of the head and neck screws.

The invention discloses an intramedullary nail which is an intramedullary support used for treating and fixing long tubal bone fracture. The intramedullary nail comprises a nail rod, wherein two ends of the nail rod are provided with transverse positioning holes, one end of the nail rod is provided with an axial tail cap bolt hole matched with a tail cap, and in the length direction, the nail rod is provided with elongated slots which are radially symmetrical; the elongated slots of the nail rod are internally provided with stripy holes penetrating through the nail rod in the radial direction; the stripy holes are uniformly arranged at intervals along the length direction of the nail rod; the side walls of the stripy holes are provided with threads matched with transverse nails for locking fractured bone blocks; the stripy holes are distributed in at least two rows on the circumference; the width of the elongated slot is 0.6-1 times the radius of the nail rod, and the depth of the elongated slot is 0.4-0.6 times the radius of the nail rod. The intramedullary nail disclosed by the invention adopts a titanium alloy material, the cross section of the nail rod is of a dual H shape, so that a reinforcement effect is achieved, not only can favorable support and fixation effects be achieved, the transverse micromotion, excess stretching and revolution of a bone fracture end can be prevented, but also any fractured bone block of comminuted fracture can be fixed.

The invention relates to a high-performance damping beam column mortise and tenon joint structure and a manufacturing method thereof. The structure comprises a wood cross beam (1) and a wood column (2) which are in mortise and tenon joint connection, and further comprises a damping mechanism; at least two slidable hinged supports (5) are arranged on the wood cross beam (1), and at least two fixed hinged supports (6) are arranged on the wood column (2); and one end of the damping mechanism is hinged to the slidable hinged supports (5), and the other end of the damping mechanism is hinged to the fixed hinged supports (6). Compared with the prior art, the high-performance damping beam column mortise and tenon joint structure has the advantages of being simple in structure, convenient to maintain, capable of improving the pulling-out resistance and the rotation resistance of mortise and tenon joint nodes and the like.

The invention relates to an exhaust gas turbocharger shaft (1), which has an impeller (2) connected to the exhaust gas turbocharger shaft in a form-closed manner and which is connected to a shaft nut (3) provided on the outer curved surface of the exhaust gas turbocharger shaft. The shaft nut (3) is inserted into a center bore of the impeller (2) in such a way that the impeller (2) forms a form-closed connection with the shaft nut (3) in the radial direction (R) and the circumferential direction (U).

The invention discloses a replaceable pre-embedded anchoring channel and a mounting method thereof. A channel body is a hollow quadrilateral with an opening formed in the bottom. Long round holes areformed in the opposite positions of the channel body and a resin gasket correspondingly, a compression ring piece is additionally arranged between the channel body and a segment, a compression ring comprises a ring body, spanner holes and an inner thread, and a T-shaped bolt is fixed to an anchoring part through the compression ring with the inner thread firstly; the anchoring part comprises an anchoring cup opening, an anchor rod and an anchoring end plate; and the cup opening is polygonal, four penetrating notches are formed in the inner side of the cup opening, wherein the upper notch is used for fixing the compression ring, the middle notch is rectangular, the rounded corners of the two ends of the middle notch are used for being connected with channels of the upper notch and the lowernotch, the T-shaped bolt passes through the middle notch to the lower notch, the lower notch is capable of rotating unidirectionally, and the T-shaped bolt rotates in the lower notch by 90 degrees and then is buckled back to a T-shaped bolt fixing notch. By utilizing connection of the T-shaped bolt and the anchoring part, the channel can be replaced rapidly and effectively.

The invention relates to a balloon dilatation intramedullary nail which comprises an outer tube, a balloon and a center rod. The balloon is arranged in the outer tube, the center rod is arranged in the balloon, the front end of the center rod is connected with the front end of the balloon and the front end of the outer tube in a sealed mode, the rear end of the center rod extends out of the rear end of the balloon, and an inner liquid inlet is formed between the rear end of the center rod and the rear end of the balloon; front tube body radial expansion parts are arranged on the front portion of the outer tube, rear tube body radial expansion parts are arranged on the rear portion of the outer tube, a front balloon body expansion part is formed in the front portion, opposite to the positions of the front tube body radial expansion parts, of the balloon, and a rear balloon body expansion part is formed in the rear portion, opposite to the positions of the rear tube body radial expansion parts, of the balloon. According to the balloon dilatation intramedullary nail, the front portion, the middle portion and the rear portion of the outer pipe expand rapidly through expansion of the balloon, and the effect of being resistant to separation and displacement and rotation between bones is enhanced.