104results about How to "Realize anti-loosening" patented technology

The invention relates to an anti-loosing threaded fastener, which comprises a nut, a bolt, a gasket and a pin. A centre hole for the bolt to penetrate through is arranged in the center of the gasket, a bulge loop is arranged on the nut or the bolt, the nut or the bolt without the bulge loop and the gasket are mutually connected along the circumference direction in a locking mode, a plurality of bulge loop holes are arranged on the bulge loop along the circumference direction, a plurality of gasket holes are arranged on the gasket along the circumference direction, when the nut is in a screwing state on the bolt, at least one bulge loop hole is completely overlapped with the gasket hole, the pin is arranged in the bulge loop hole and the gasket hole which are completely overlapped, a protruding portion is arranged in the bulge loop hole or the gasket hole, and a clamping block matched with the protruding portion is arranged on the pin. The anti-loosing threaded fastener is simple in structure, convenient to use, capable of reliably achieving looseness prevention between the nut and the bolt, and easy to repeatedly install and dismantle.

The invention discloses an anti-loosening mechanism for installing a robot. The anti-loosening mechanism comprises a bolt bar and a fastening nut. A section is axially formed on the bolt bar, a left-hand threaded rod is integrally formed at the top end of the bolt bar, the bolt bar is sleeved with a gasket, a through hole matched with the bolt bar is formed in the gasket, the fastening nut is connected to the side, corresponding to the gasket, of the bolt bar in a threaded mode, a first threaded hole is formed in the middle of the fastening nut, an arc groove is formed in the part, corresponding to the periphery of the first threaded hole, on the fastening nut, a limiting nut is connected to the side, corresponding to the fastening nut, of the outer side wall of the left-hand threaded rodin a threaded mode, a second threaded hole is formed in the middle of the limiting nut, fixing holes are formed in the part, corresponding to the periphery of the second threaded hole, of the limitingnut, and fixing mechanisms are connected to the position, corresponding to the arc groove, in the fixing holes in an inserted mode. Compared with a traditional bolt, the anti-loosening mechanism is not likely to loosen, the loosening dropping phenomenon can be avoided, and safety accidents can be avoided; and meanwhile, disassembling is convenient, the anti-loosening mechanism can be used again,and waste can be avoided.

The invention relates to a circular underwater sealing electric connector capable of being plugged in a blind manner. The electric connector comprises a plug and a socket, wherein the plug comprises aconnecting nut, an anti-loose mechanism and a plug sealing-connecting assembly; and the socket comprises a socket sealing-connecting assembly. The circular underwater sealing electric connector capable of being plugged in the blind manner provided by the invention has the advantages that due to the fact that the plug and the socket are both sealed by sintering and forming a glass sintering layerand a contact part, and a sealing jack insulation assembly is arranged at the plugging end of the plug, so that the internal structure of the jack insulation assembly can realize self-sealing, and theoutside of the jack insulation assembly is sealed with the plug shell; when water enters the plugging end plane of the plug, the sealing structure of the jack insulation assembly plays an isolating role, so that short circuit in the plug caused by water entrance to the internal structure of the plug can be avoided; and after water entrance, the electric connector can be used as normal by only performing a simple operation on the plug, so that high product maintainability and high reliability are achieved, and the electric connector is suitable for application occasions with high-reliability sealing requirements.

The invention discloses a two-degree-of-freedom motion mechanism suitable for 10kv power distribution operation. The two-degree-of-freedom motion mechanism comprises an inner casing, a clamping mechanism, a driving mechanism, a rotating mechanism, an outer casing and a stopping mechanism. The clamping mechanism is arranged in the inner casing and comprises more than two inner rollers 1 and a pressing assembly. The inner rollers 1 are rotatably mounted on the inner wall of the inner casing. The pressing assembly is disposed above the inner rollers 1. The pressing assembly and the inner rollers1 clamp or loosen a cable in cooperation. The driving mechanism is disposed in the inner casing and drives the inner rollers 1 to rotate. The rotating mechanism is disposed on the outer wall of the inner casing. The rotating mechanism drives the outer casing to rotate around the inner casing. The stopping mechanism is disposed between the inner casing and the outer casing and is configured to restrict axial movement between the inner casing and the outer casing, and to support the outer casing to rotate around the outer casing. The two-degree-of-freedom motion mechanism suitable for 10kv powerdistribution operation has high flexibility, can facilitate the comprehensive cable detection by a detection device, and can also adapt to a variety of working environments.

The invention relates to an intelligent lock gasket based on a force-induced color change coating. Safety and reliability of bolt connection are guaranteed. The intelligent lock gasket is composed ofthe force-induced color change coating and a lock gasket body. The force-induced color change coating is arranged at the top end of the gasket body. According to the intelligent lock gasket, safety and reliability of gasket connecting can be achieved, the structural weight is low, and demounting and mounting are convenient; and maintainability is good, and the accident caused by gasket loosening and breakage to key structure connection can be effectively avoided.

The invention relates to the field of electric connectors, particularly to an anti-looseness type nut screw mechanism and an electric connector using same. A nut screw mechanism comprises a nut and a screw. A controlling part which is used for controlling is arranged on the rear portion of the nut; an inner sleeve is arranged in the front of the controlling part on the nut; a fastening cover sleeves the inner sleeve and matches with the inner sleeve along a front-back direction in a sliding mode; locking bolts are arranged on the inner wall surface of the fastening cover; locking grooves are arranged on the inner sleeve; the locking groove comprises a transverse groove which extends along the circumference direction of the inner sleeve and a longitudinal groove which extends from front to rear of the transverse groove which is connected and communicated with the longitudinal groove; the rear end of the fastening cover is provided with introversive edges and a top tight spring is arranged between the inner side of the introversive edges and the inner sleeve in a top mounting mode; pin holes are formed on the controlling part, pin columns are fixedly arranged at the introversive edges of the fastening cover, every pin column is directed at a corresponding pin hole when the locking bolt is located in the transverse groove, and accordingly the loose problem of the existing nut screw mechanism is solved.

The invention discloses a worm self-locking anti-loose type overload protective clamp, and belongs to the field of clamps. The worm self-locking anti-loose type overload protective clamp comprises a clamp base, a left fixing block, a left screw, a left clamping block, a right clamping block, a right screw and a right fixing block, a dovetail groove is formed in the clamp base, and the left fixing block and the right fixing block are arranged at the two ends of the dovetail groove. The worm self-locking anti-loose type overload protective clamp further comprises a safe engaging and disengaging mechanism, a fixed base, an adjusting rod, an outer ring, a screw, a spring, a steel ball, a square shank and worm self-locking anti-loose devices, both the adjusting rod and the left screw are provided with the worm self-locking anti-loose devices, the adjusting rod is assembled in a threaded hole of the fixed base, the square shank is connected with the adjusting rod, the screw is assembled in a threaded hole of the outer ring, the steel ball is pressed on the surface of the square shank, and the spring is arranged between the screw and the steel ball. The worm self-locking anti-loose type overload protective clamp solves the problems that an existing clamp is not easy to control in clamping force and prone to loosening, and has the advantages of being simple in structure, reasonable in design and easy to manufacture.

The invention discloses a bolt assembly for an automobile hub. The bolt assembly for the automobile hub comprises a stud bolt, a hub nut assembly and a wheel disc nut assembly, wherein the front threaded part of the stud bolt is provided with the hub nut assembly, the rear threaded part of the stud bolt is provided with the wheel disc nut assembly, the hub nut assembly comprises a cushion block, apositioning body, a plurality of fixing bodies and a nut, the front threaded part of the stud bolt is sleeved with the cushion block and the nut in threaded connection, and the nut is pressed againstthe front end of the cushion block, the inner wall of the cushion block is provided with the positioning body, the bolt is provided with a positioning groove matched with the positioning body, the cushion block is provided with evenly distributed fixing bodies, the fixing bodies can be deformed and can keep deformed shape, and the fixing bodies are deformed under the action of external force so as to hold the nut tightly. Compared with the prior art, the bolt assembly has the anti-loosening and anti-theft effects.

The invention relates to the technical field of electromagnetic track brakes of track vehicles and discloses a suspension device for an electromagnetic track brake of a track traffic vehicle. An upper spring base and a lower spring base are arranged on a suspension screw sleeve; a suspension spring is mounted between the upper spring base and the lower spring base; a threaded hole in the middle of the suspension screw sleeve is matched with the upper end of an adjusting screw; a lower boss is arranged at the lower end of the adjusting screw; a suspension tray is movably arranged on the lower boss; a through hole is formed in the middle of the adjusting screw; the upper end of the through hole takes the shape of a horn mouth; a locking bolt is arranged in the through hole; the upper end of the locking bolt penetrates through the horn mouth; the upper end of the locking bolt is connected with a locking wedge through threads; the locking wedge is matched with the horn mouth; a flange surface of the lower spring base, a shaft shoulder of the suspension screw sleeve and the vehicle are fixedly mounted; the suspension tray and the brake are fixedly mounted. An existing lead screw nut structure is replaced, the structure is compact, and the overall length is greatly reduced.

The invention discloses a locknut looseness preventing device which comprises a base body (1), a threaded rod (5) and a locknut (4) and further comprises a lock ring (2) and a safety wire (3). The lock ring (2) comprises a key (201). The connecting end of the base body (1) is provided with a key groove (101) matched with the key (201). The lock ring (2) further comprises a safety hole (202). The locknut (4) further comprises a safety hole (401). When the locknut looseness preventing device is used, the two safety holes are connected through the safety wire (3), the key (201) is matched with the key groove (101), and thus looseness prevention of the whole locknut looseness preventing device is achieved.

The invention relates to a connector, an adaptive connector and an anti-loose connector assembly. The anti-loose connector assembly comprises the connector and the adaptive connector, the front ends of which are in plug connection mutually when used. The connector comprises a connector housing provided with an external thread. The adaptive connector comprises a nut provided with an internal thread. The connector housing is provided with connector anti-loose teeth. The nut is provided with nut anti-loose teeth cooperated with the connector anti-loose teeth. The outer circumference of the connector housing is provided with a seal ring. The inner circumference of the nut is provided with a seal matching surface for being in seal matching with the seal ring. The invention provides the anti-loose connector assembly capable of realizing both anti-loosening and seal effects, and the connector and the adaptive connector used in the anti-loose connector assembly.

The invention provides a friction type anti-loosening structure of an underwater clamp connector. The friction type anti-loosening structure comprises a clamp handle, a clamp handle fixing plate, a clamp handle rotating block, a threaded rod, a threaded sleeve, a torsion joint, a guide plate and a pressing plate. Reticulated knurling is arranged on the contact surfaces of the clamping handle and aclose bolt of the clamp connector, so that the friction coefficient of the clamping handle and the close bolt is increased; a lug is arranged outside the threaded sleeve and capable of limiting the circumferential direction and the axial movement of the threaded sleeve through being assembled and rotated by a certain angle with a shell plate of the connector, so that the linear movement of the threaded rod is ensured; when the threaded sleeve and the threaded rod are rusted and cannot be screwed off, a remote control robot carries a manipulator to axially pull the threaded rod out of one sideof a pressing plate of the shell plate, wherein the pressing plate plays a limiting role, and the pressing plate can be pulled off so that a locking device and the close bolt can be separated; the guide plate is used for limiting the rotation of the clamp handle; and the torsion joint is provided with an interface combined with a torsion wrench, and a ROV carries the torsion wrench to realize therotation of the threaded rod, so that the pressure of the clamp handle and the close bolt is provided, and the anti-loosening purpose is finally realized.

The invention discloses an acceleration sensor assembly and an acceleration sensor mounting method. The acceleration sensor assembly comprises an acceleration sensor, a steel wire, a waveform gasket,a special-shaped gasket and an installation boss. The acceleration sensor comprises a main body part, a shell coating the main body part, and a mounting bolt. At least one set of through holes are formed in the shell, and a steel wire fixing mechanism is arranged on the special-shaped gasket. The installation boss is provided with a threaded hole matched with the installation bolt and an installation face matched with the special-shaped gasket. The locking steel wire is fixed through the special-shaped gasket and the steel wire fixing hole, and when the acceleration sensor is screwed down, thespecial-shaped gasket is buffered and pressed through the elastic waveform gasket, so that the steel wire can be locked, looseness prevention of the sensor is achieved, and stable and reliable measurement data are obtained.

A lock nut comprises an outer nut and an inner nut. A first internal thread is formed inside the inner nut. An external thread is formed in the lower end of the outer wall of the inner nut. A second internal thread is formed in the middle inside the outer nut. A third internal thread is formed in the bottom end inside the outer nut. The inner nut is installed inside the outer nut. The external thread and the second internal thread are consistent in screwing direction. The external thread and the first internal thread are opposite in screwing direction. The external thread and the third internal thread are opposite in screwing direction. The distance between a first plane at the bottom of the inner nut and a second plane below the second internal thread inside the outer nut is not smaller than the one-fold screw pitch. The lock nut has the beneficial effects that a bolt cannot loosen after the bolt is screwed down by hand and the left-hand and right-hand threads are meshed, and the anti-looseness effect is good; the structure is simple, looseness prevention can be achieved by easy nut and bolt fastening; installation is convenient; the optional bolt range is wide; when the bolt is screwed down, the bottom face of the head of the bolt and the top face of the inner nut are not in contact, and therefore the needed pretightening force is much smaller than that in the prior art.

The present invention provides a slack preventive fastener for a screw tool formed in a relatively simple structure, easily manufacturable at low cost by mass production, and capable of easily and securely preventing a screw tool from being loosened as a fastener for a screw tool miniaturized or refined by precise processing for assembling various types of small-sized products; and a method and a device for manufacturing the fastener. The fastener comprises a fastening device (10) such as a nut, an insert, etc. to be fastened with the screw device such as a screw, a bolt, etc. A recessed part (18) formed by press-molding from the outside is provided in a part of the outer peripheral wall of the fastening device to form a diameter-reduced deformation part (20) where the diameter of the crest or bottom of a female thread is partially reduced in the inner peripheral wall of the fastening device.

The invention provides a special postpartum health-care abdomen-in examination device, which relates to the technical field of medical instruments and comprises a mounting seat, a fixing part and an auxiliary part, an inspection device main body is mounted on the mounting seat; the mounting seat is formed by welding two main body plates and two connecting rods, and the two main body plates are of concave structures. The head ends of the telescopic gas cylinders are connected with the auxiliary rod in a welding mode, the auxiliary rod is located at the position 3 cm below the handle, and when the auxiliary rod and the handle are held at the same time, the telescopic gas cylinders are in a gas spraying shape, and therefore gas spraying cleaning of the display screen and the keyboard is achieved. Due to the fact that the clamping groove is of a semi-cylindrical structure, the clamping groove is matched with the detection head, and the clamping groove forms a clamping type fixing structure of the detection head, clamping of the detection head can be achieved through the clamping groove, overall carrying is facilitated, and the problems that carrying is not convenient enough during inspection, and the auxiliary cleaning function cannot be achieved during carrying are solved; the dustproof effect at the jack is weak, and the cable plug is easy to loosen.

The invention discloses a polysulfide sealant microcapsule as well as a preparation method and application thereof, belonging to the technical field of sealing and corrosion prevention. The preparation method comprises the steps of reacting by virtue of urea and formaldehyde under a low-temperature continuous stirring condition for 6-24 hours by virtue of an in situ polymerization method, and sequentially carrying out distilled water washing, vacuum filtration and room temperature drying on a product, so as to obtain the polysulfide sealant microcapsule. The particle size of the prepared polysulfide sealant microcapsule is 80-150 microns, the microcapsule is of a relatively regular sphere shape, has a relatively rough surface and is good in monodispersity, the coating amount of a sealant is relatively high, and the sealant does not denature after being placed at the room temperature for a long time. The preparation method has the beneficial effects that preparation conditions are mild, the operation is simple, and equipment requirements are low; and the prepared polysulfide sealant microcapsule can be widely applied to pre-coating of sealed screws and rivets and other parts required to be sealed through extrusion and has wide application prospects in the industrial fields of automobiles, aerospace, ships, petrochemical industry, electric instruments and the like.

The invention discloses an anti-falling screw, which belongs to the field of fasteners. The structure includes a screw head and a screw rod. The screw head is a circular cylinder with a layer of wear-resistant coating sprayed on the surface. The structure overlaps a word groove and a cross groove, and the groove is provided with a magnet adsorption film and a wear-resistant layer, and a wing-shaped protective edge is provided around the screw head cylinder; the surface of the screw rod forms an external thread The outer surface of the upper part of the screw rod near the screw head is provided with an elastic ring. The invention solves the problems of inconvenient use of ordinary screws, wear of the groove after repeated use, and easy falling off, which causes the screw to rust and harm the human body.

The invention discloses a locknut. The locknut simple in structure and reliable in mounting is provided aiming at the problems that in the prior art, large torque is needed for loosening preventing of double nuts, and operation is inconvenient. The locknut comprises a nut body. An inner annular groove is formed in the thread face of the nut body. An outer annular groove is formed in the outer side wall of the nut body. The diameter of the bottom face of the inner annular groove is larger than the diameter of the bottom face of the outer annular groove. The inner annular groove and the outer annular groove are formed in a spaced mode in the axial direction. Medium spacing between the outer annular groove and the inner annular groove is a deformed section. The two sides of the inner annular groove are a front thread section and a rear thread section correspondingly. An anti-loosening hole is formed in the front end face of the nut body and penetrates through the inner annular groove and the outer annular groove. By deforming of the deformed section between the outer annular groove and the inner annular groove, threads of the front thread section and the rear thread section of the nut body cling to the front and rear sides of a screw thread; and a matching section and an anti-loosening section are made integrally, relative rotating does not occur, and therefore, the anti-loosening effect is reliable.

The invention discloses a two-degree-of-freedom motion mechanism suitable for 10kv power distribution operation. The two-degree-of-freedom motion mechanism comprises an inner casing, a clamping mechanism, a driving mechanism, a rotating mechanism, an outer casing and a stopping mechanism. The clamping mechanism is arranged in the inner casing and comprises more than two inner rollers 1 and a pressing assembly. The inner rollers 1 are rotatably mounted on the inner wall of the inner casing. The pressing assembly is disposed above the inner rollers 1. The pressing assembly and the inner rollers1 clamp or loosen a cable in cooperation. The driving mechanism is disposed in the inner casing and drives the inner rollers 1 to rotate. The rotating mechanism is disposed on the outer wall of the inner casing. The rotating mechanism drives the outer casing to rotate around the inner casing. The stopping mechanism is disposed between the inner casing and the outer casing and is configured to restrict axial movement between the inner casing and the outer casing, and to support the outer casing to rotate around the outer casing. The two-degree-of-freedom motion mechanism suitable for 10kv powerdistribution operation has high flexibility, can facilitate the comprehensive cable detection by a detection device, and can also adapt to a variety of working environments.

The invention provides a universal check bolt and an assembly and installation method thereof, and belongs to the field of bolts. According to the universal check bolt and the assembly and installation method thereof, the problem that a conventional check bolt cannot fix a normal connecting piece is solved. The universal check bolt comprises a screw rod, a bolt head and a reset spring, wherein threads are arranged on the periphery of the screw rod; a movable cavity is formed in the screw rod; a movable rod is arranged in the movable cavity; a plurality of anti-loosening holes are formed in thescrew rod; an anti-loosening sheet is adaptively arranged in each anti-loosening hole; a driven telescopic mechanism is arranged between the inner side edges of the anti-loosening sheets and the movable rod; a rubber strip is fixed on the outer side edge of each anti-loosening sheet; sawteeth are arranged on the rubber strips; a plurality of adjusting holes are formed in the bolt head; an adjusting rod is arranged in each adjusting hole; a driving telescopic mechanism is arranged between the inner ends of the adjusting rods and the movable rod; the outer end of each adjusting rod is a spherical adjusting head; the reset spring is positioned in the movable cavity; and the two ends of the reset spring abut against the top end of the movable cavity and the top end of the movable rod. By means of the universal check bolt, a traditional bolt can be directly replace, so that the universality is better; and the universal check bolt is prevented from being completely locked, later disassemblyand maintenance are facilitated, and the universal check bolt is easy and convenient to assemble and disassemble.

The invention provides a cam loosening preventing mechanism applied to an underwater hoop connector. The cam loosening preventing mechanism comprises an upper fixing support, a lower fixing support, acam, a loosening preventing ROV bottom plate, an ROV wrench support and an ROV wrench, wherein the upper fixing support and the lower fixing support are arranged on a connector housing plate; the camis positioned between the upper fixing support and the lower fixing support; the loosening preventing ROV bottom plate is arranged above the upper fixing support; the ROV wrench support is arranged on the loosening preventing ROV bottom plate; the ROV wrench is arranged in the ROV wrench support; a middle shaft is arranged at the upper end of the cam and penetrates through the upper fixing support to be connected with the ROV wrench; two annular hole grooves are formed in the cam; loosening preventing pins are arranged in the annular hole grooves; pin holes are formed in the connector housingplate, and the tails of the loosening preventing pins are inserted into the pin holes; two double-end studs are further arranged between the upper fixing support and the lower fixing support; and twobosses with arc-shaped grooves are arranged on the side face of the cam. According to the cam loosening preventing mechanism, dual loosening preventing is achieved, the reliability of a project is guaranteed, and the quality of the project is improved.

The invention provides a high-precision ovarian epithelial malignant tumor detection mechanism, relates to the technical field of medical apparatuses and instruments, and solves the problem that a connecting cable on an existing device is easy to loosen and cannot automatically prevent a plug from loosening when the connecting cable is inserted into the body of a patient and a cover plate is opened through structural improvement. The ovarian epithelial malignant tumor detection mechanism comprises a detection mechanism terminal, the detection mechanism terminal is fixed on the workbench, the detection mechanism terminal is connected with a handle through a connecting cable, and an auxiliary part is mounted on the handle. The diameter of the cleaning block B is smaller than the diameters of the seat body and the mounting seat, and the seat body and the mounting seat jointly form a protection structure of the cleaning block B, so that the cleaning block B is not in contact with the workbench when the seat body and the mounting seat are in contact with the workbench during placement, and the cleaning block B is prevented from being contaminated by dust.

The invention relates to a radar structure with a multi-cavity coupling sealing heat dissipation air duct and a universal pitching support frame. Two independent air ducts are adopted, and the independent air duct I independently completes heat dissipation of a signal part, a microwave module and a wave control power supply which are low in heat consumption; and the independent air duct II independently finishes heat dissipation of the TR assembly with high heat consumption and high heat density. Due to the fact that the radar needs to have usability of frequently disassembling a rear plate, the independent air duct II needs to adopt a structural form that a unique thread pre-tightening force is matched with a sealing rope to conduct double-face pressing to solve a problem of multilayer sealing caused by a detachable multi-cavity coupling air duct. Subsystems in a radar case are attached to outer surfaces of the sealed air ducts I and II through heat conduction gaskets, heat is transmitted to the heat dissipation fins on the inner surfaces of the air ducts I and II in a heat conduction mode with low heat resistance, and heat is taken away through convection of a draught fan. Problems of integrated design and heat dissipation of each extension set of the radar in a high-heat-density environment are solved.

The invention relates to an electrical connector with a separation power-assisting mechanism and an assembly thereof. The front end of the electrical connector is used as a plugging end; the electrical connector comprises a shell; both left and right sides of the front end of the shell are respectively provided with lock plates capable of swinging along the back-and-forth direction of the shell by dowels in an anti-falling mode; the lock plates are provided with locking stations and unlocking stations on the shell; spring locking mechanisms are arranged between the shell and the lock plates; the front end of each lock plate is provided with a hook part for being hooked and matched with an adaptive connector when the lock plate is positioned in the locking state and a prying arm part for prying the adaptive connector forward when or after the lock plate is separated from the adaptive connector in the process of swinging backward to the unlocking station from the locking station; supporting mechanisms for providing fulcrums for the corresponding lock plates when the corresponding prying arm parts work so as to ensure the lock plates to be formed into level mechanisms is arranged behind the dowels on the shell; and track holes for compensating the relative displacement between the corresponding lock plates and the corresponding dowels when the lock plates reciprocate between the locking stations and the unlocking stations are arranged on the lock plates. The problem of difficulty in separating the electrical connector is solved.

The invention discloses a locking positioning structure. A bolt and a nut are included. The bolt comprises a stud and a screw cap. A locking structure is further arranged between the nut and the screwcap and comprises a cushion plate. The center of the cushion plate is provided with a circular hole with the diameter equal to the diameter of the stud. The inner ring of the cushion plate is evenlyprovided with at least three grooves. The side wall of the stud is provided with one vertical clamp groove. A positioning protrusion clamped into the vertical clamp groove is integrally formed on theinner ring of the cushion plate. V-shaped abutting blocks are further arranged. The corner positions of the V-shaped abutting blocks are connected in the grooves through pin shafts. Buckle grooves areevenly formed in the outer surface of the nut. Buckle protrusions are fixed to the top ends of the V-shaped abutting blocks. Abutting columns are fixed to the bottom ends of the V-shaped abutting blocks. The locking positioning structure is reasonable in structure arrangement, nut loosening preventing can be effectively achieved, the abutting columns can firmly abut against the top face of a to-be-locked piece, normal overhauling and maintaining of the nut cannot be influenced, locking stability is guaranteed, and applicability and practicability are high.