667results about How to "Improve anti-loosening performance" patented technology

The invention discloses a loosening prevention nut connecting structure which comprises a connecting piece and a screw penetrating through the connecting piece. A nut is screwed to the screw to fasten the connecting piece, the nut is sleeved with a loosening prevention loop, a rotation preventing structure is arranged between the loosening prevention loop and the connecting piece and comprises a sunken groove formed in the connecting piece and corresponding to the nut, the bottom is arranged in the sunken groove after the nut is screwed, the outer ring of the loosening prevention loop is provided with a clamping head, and a clamping groove for the clamping head to be clamped therein is formed in the side wall in the sunken groove. The loosening prevention nut connecting structure is simple in structure and good in loosening prevention performance.

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 provides a system for on-line monitoring abnormal vibration of a GIS equipment isolating switch. The system comprises a signal acquisition unit formed by a piezoelectric type accelerometer and a current transformer, an equipment terminal signal processing unit formed by a filtering amplification module, a high-speed AD sampling module, a DSP module, an ARM processor module, a communication module and a power supply module, a sensor disconnecting-prevention unit formed by a connection board, a connecting fixing member, a copper sheet, a controller and a piezoelectric transducer, a background monitoring server and a human-machine interface. During use, the signal acquisition unit acquires vibration and current signals and sends the vibration and current signals to the equipment terminal signal processing unit for processing, the equipment terminal signal processing unit sends preprocessed information to the background monitoring server for monitoring and determining, and the sensor disconnecting-prevention unit assists in fixing the piezoelectric type accelerometer and gives off an alarm when the piezoelectric type accelerometer falls off. The system has the advantages of simple structure and easy realization and ensures timely fault discovering, rapid response and highly-reliable operation during use.

The invention relates to the technical fields of an automobile and machinery and discloses a bolt group. The bolt group comprises a bolt and a nut; a fastening sleeve is sleeved on a screw of the bolt; the fastening sleeve is arranged between the head part of the bolt and the nut; a group of one-way ratchets are respectively arranged on the opposite end faces of the fastening sleeve and the nut; two groups of ratchets are mutually meshed, and the loose directions of the ratchets on the end face of the nut are the same as the rotating direction of the nut fastened oppositely to the bolt. According to the bolt group, one matched fastening sleeve is added on the basis of a common bolt group; the fastening sleeve is matched with a flange nut, and the attached surface adopts a ratchet-type mounting surface, so that the nut reversely rotates difficultly after being forwards fastened by the nut. Therefore, the anti-loosing performance of the nut is greatly strengthened; the security of mounting mechanical parts is improved; the overall bolt group is simple in structure, convenient to mount and dismantle and strong in applicability.

The invention discloses an expansion lock bolt which is characterized by comprising a main bolt and a catch bolt. An external threaded structure which is matched with an internal threaded hole of a workpiece in a threaded manner is arranged on the outer circumferential surface of the main bolt, an axially through internal threaded hole is formed in the main bolt, a front section of the main bolt is an expansion section which can be radially expanded, and an axially through hollow expansion hole is formed in the expansion section; the catch bolt is matched with the internal threaded hole of the main bolt by external threads of the catch bolt in a threaded manner, the rotation direction of the catch bolt in the main bolt is opposite to the rotation direction of the main bolt in the internal threaded hole in the workpiece; a bolt front end of the catch bolt can deeply extend into the hollow expansion hole of the expansion section, so that the expansion section can be radially expanded and butted to the surface of the internal threaded hole of the workpiece. The expansion lock bolt has the advantages that loosening can be effectively prevented, the expansion lock bolt is easy to disassemble, and abrasion can be prevented.

The invention discloses an intelligent plastic shell circuit breaker, comprising a plastic base and an upper cover, wherein, the base is provided with a contact mechanism, an operating mechanism, a tripping mechanism and a current transformer device; the upper surface of the upper cover is provided with an electronic operating switch and a display screen observation window; the operating mechanism comprises a switch-on and switch-off operating handle; the current transformer device comprises a current transformer, a substrate which is used for placing the current transformer and a cover body which matches with the substrate; the substrate is provided with a placement chamber which is used for placing the current transformer, an installation opening which is used for introducing the current transformer and a location boss which is used for locating the current transformer; the center of the location boss is provided with wiring holes; the cover body is provided with through holes which match with the wiring holes at the center of the location boss. The invention has the advantages of convenient installation and inspection operation.

The invention belongs to metallurgical equipment fasteners, and particularly relates to a novel locking fastener applicable to a straightener system. The novel locking fastener at least comprises a screw rod (1) and a nut (3), and is characterized in that when the screw rod (1) and the nut (3) are screwed together, the bottom end of the nut (3) is fixedly connected with a pressure cover (5) through a locking screw (6), and the head of the pressure cover (5) is screwed in the screw rod (1) in a threaded way. The novel locking fastener has the advantages of being good in locking effect and easy to process and implement, and ensuring that a user can easily observe whether the thread is loosened.

The invention discloses a double-rod bolt, which includes an outer bolt and an inner bolt. The outer bolt includes an outer bolt head of an integral structure and an outer bolt rod provided with an outer thread extending to the end. The through shaft hole of the bolt head and the outer bolt shank, the inner bolt includes an inner bolt head and an inner bolt shank, the diameter of the inner bolt head is larger than the diameter of the through shaft hole, and the inner bolt shank is connected from the port at one end of the outer bolt head It is inserted into the through shaft hole and its end passes through the end of the outer bolt rod, and the end of the inner bolt rod is provided with a first external thread; by adding an inner bolt through the outer bolt to further lock with the screw, the tight When in use, the two are restrained by each other, so it is not easy to loosen, thereby improving the anti-loosening effect.

The invention relates to a magnetic force anti-vibration loosing-proof bolt and nut that includes magnetic guiding bolt and magnetic nut that is formed by a flute nut and a permanent magnet. When the nut screwing on the bolt, the permanent magnet would generate magnetic attraction to the bolt to make the nut and the bolt joint together, if the fasten material is magnetizer, the nut would joint with it tightly. And the nut, the bolt and the fasten material would be joint together, and sharply increase the fastening strength and loosing defend ability. The invention has good anti-vibration loosing-proof ability, simple structure and is material saving.

The invention relates to the technical field of fastener detection and particularly relates to a bolt loosening test device which comprises a testing machine and a driving control component. The testing machine comprises a moving plate, a fixed plate and a monitoring component, the moving plate and the fixed plate are arranged in parallel, a gap is between the moving plate and the fixed plate, a first simulation contact block passes through the moving plate, a second simulation contact block opposite to the first simulation contact block passes through the fixed plate, the first simulation contact block has a first through hole, and the second simulation contact block has a second through hole which correspondingly communicates with the first through hole. A tested bolt can pass through the first through hole and the second through hole in sequence to connect a tested nut. The monitoring component comprises a first monitoring component which is connected to the tested nut, and the driving control component is connected to the moving plate. According to the bolt loosening test device, the reliability of a bolt connection structure can be tested, and a test basis is further providedfor improving the loosening prevention performance of a bolt connection structure. The device has the advantages of convenient operation, low failure rate and stable performance.

The invention relates to a suspension hardware fitting for an optical phase conductor. The suspension hardware fitting comprises internal twisted wires, external twisted wires, a rubber fixture block, a cast aluminum shell, a socket clevis, an insulator string, a ball eye and a U-shaped suspension loop, wherein the external twisted wires clad the optical phase conductor; the external twisted wires clad the internal twisted wires; the rubber fixture block is arranged between the internal and external twisted wires; the cast-aluminum shell is arranged outside the rubber fixture block and the external twisted wires; the lateral surface of the cast-aluminum shell is sequentially connected with the socket clevis, the insulator string consisting of a plurality of series-wound insulators, the ball eye and the U-shaped suspension loop; the other end of the U-shaped suspension loop is connected with a tower and a fixed suspension hardware fitting; and the U-shaped suspension loop may be of an A type, a B type or a C type. The suspension hardware fitting provided by the invention is used for suspending an optical phase conductor cable on the tower; and due to the adoption of a pre-twisted suspension clamp, the suspension hardware fitting greatly improves the stress bearing capability of the optical cable on the basis of meeting a supporting function, and can prolong the service life of the optical cable.

The invention belongs to an anti-loose technology of a threaded connection fastener, and provides a thread positioning locking mechanism and a mounting method. The thread positioning locking mechanism comprises a shaft with a threaded shaft section, a split nut (2), a bolt (3) and a stop block (4), wherein internal thread of the split nut is in interference fit with external thread of the shaft; an opening of the split nut (2) is in a run-through structure from an external diameter surface of the split nut to an inner hole of the split nut; a threaded hole and an unthreaded hole are formed on two sides of the opening of the split nut (2) respectively; the bolt (3) is matched with the threaded hole and the stop block (4); when the threaded section of the shaft is provided with the split nut (2), the opening of the split nut is properly stretched; after the split nut (2) is arranged in place, the bolt (3) is matched with the unthreaded hole and the threaded hole; and further, the split nut (2) on the threaded section of the shaft is fastened. According to the thread positioning locking mechanism and the mounting method, the thread connection fastening locking state is improved, and the anti-loose capacity is greatly improved.

The invention relates to fastening and anticorrosion technologies, in particular to a chemical holding multilayer cladding compound protection method applicable to a transmission tower with alternating loads in corrosion environment. Curing factice, non-curing factice, anti-corrosive tapes and adhesives are sequentially arranged on the surface of a protected structure. The curing factice is used for fastening and sealing the fastener, and the surface of a projected object to be coated needs to be subjected to treatment such as oil removal, rust removal and water removal. The non-curing factice is used for leveling a special-shaped structure; meanwhile, the curing factice is coated for building anaerobic environment; the chemical holding effect of the curing factice can be conveniently achieved; the alternating loads can be born; and the loosening is prevented. The adhesives are used for fast film forming; the adhesives and the anti-corrosive tapes are used for isolating the contact with corrosive media such as moisture and air in environment; the anticorrosion performance is good; and meanwhile, an effect of attractive appearance is achieved.

An improved eccentric type self-locking nut fundamentally solves the problems of looseness and the like under the working conditions of high vibration frequency, high vibration strength, long vibration period and the like in the prior art and comprises a lower body and an upper body, an eccentric boss is arranged on the upper portion of the lower body, and an eccentric hole is formed in the lower portion of the upper body. The eccentric type self-locking nut is technically characterized in that the eccentric boss of the lower body and the eccentric hole of the upper body are connectively fixed in a close fit manner through a thin-walled sleeve with a frustum, the external diameter of the eccentric boss of the lower body is as same as the internal diameter of the thin-walled sleeve with the frustum, the internal diameter of the eccentric hole of the upper body is as same as the external diameter of the thin-walled sleeve with the frustum, axial central lines of the eccentric boss, the eccentric hole and the thin-walled sleeve with the frustum as well as a thread central line of the upper body and a thread central line of the lower body deviate from a same eccentric axis when the eccentric boss, the eccentric hole and the thin-walled sleeve with the frustum are in the initial state, and an axial initial distance is set between the end of the upper body and the end of the lower body. The eccentric type self-locking nut is simple in processing technology, reasonable in bearing after being matched with a connecting bolt, convenient to mount and demount like a common nut and capable of using own looseness moment to achieve a locking function, and has the advantages of capability of remarkably improving nut looseness preventing effect, more benefit to reuse and the like.

The invention provides an anti-loose screw fastener. The anti-loose screw fastener comprises a screw, a ratchet wheel and a check ring. The ratchet wheel is fixed to the screw. The check ring is fixedto the end face of a workpiece and is aligned with a threaded hole of the working table. The sidewall of the check ring is provided with a locking slot around the axis of the check ring. A locking pawl matched with the ratchet wheel is arranged in the locking slot. The locking pawl is rotatably connected with the check ring. An elastic part abutting against the locking pawl and rotating inwards to extend into a center hole of the check ring is mounted between the locking pawl and the locking slot. When the screw is screwed in the positive direction and is screwed into the threaded hole of theworkpiece, the ratchet wheel goes into the check ring, the locking pawl slides on the tooth back of the ratchet wheel. When the screw is screwed in the reverse direction, the ratchet wheel and the locking pawl are clamped tightly so that the screw cannot be screwed out from the threaded hole. The locking pawl is pushed outwards and can retreat from a tooth groove of the ratchet wheel, and then the screw can be rotated reversely to be screwed out from the threaded hole. The anti-loose screw fastener is simple in structure and good in anti-loose effect.

The invention discloses a multifunctional locking nut. The multifunctional locking nut comprises an anti-theft cylindrical part, a locking nut, an internally-arranged spring, a limiting step, a rotating sleeving part and a hexagonal locking sleeve. According to the multifunctional lock nut, an internally-arranged spring sleeving ring is added to the nut, thus the situation that the nut is loosened due to the fact that a bolt and the nut are subjected to machine vibration for a long time can be effectively prevented, and furthermore, the locking effect of the nut is enhanced. A rotating sleeving part device is added to the locking nut, thus the internally-arranged spring can be loosened and tightened more conveniently, and furthermore, the locking nut is more convenient to use. By means of the structural manner that the hexagonal locking sleeve is matched with a cylinder with an internal thread, after the nut is locked, the hexagonal locking sleeve is taken down, thus the locking nut cannot be taken down with a common spanner, and furthermore, the locking nut has the anti-theft function.

The invention provides a cable-stayed bridge tower column concrete distributing device, relates to the technical field of cable-stayed bridge tower column construction, and solves the problem that vibration falling of residues in a feeding pipe cannot be enhanced while reciprocating feeding is performed through structural improvement. And high looseness prevention of the fixing bolt cannot be achieved through cooperation of multiple structures. A cable-stayed bridge tower column concrete distributing device comprises a frame body. A sliding structure is installed on the frame body, and the driving structure is in engaged transmission with the sliding structure. As a groove is elastically connected with the head end of the elastic telescopic rod in a clamped mode, and the head end of the elastic telescopic rod is of a semispherical structure, when the tooth row and the containing frame reciprocate, the elastic telescopic rod and the groove vibrate, and then residues are prevented from remaining in a pipeline. The protrusions are welded to the top end face of the vibration plate in a rectangular array shape, and the protrusions and the grooves are arranged in a staggered mode. The joint of the bulge and the groove is in smooth transition, and the bulge is of an arc-shaped structure, so that the vibration amplitude of the elastic telescopic rod and the groove is improved.

The invention provides a combined locknut capable of being prevented from automatically unlocking on a bolt. The combined locknut comprises a fastening nut, a lock washer, a spring washer and a compressing nut. The combined locknut is characterized in that a limiting groove is formed in the fastening nut; a locking lug and a returning stopping lug are arranged on the lock washer; anti-slip teeth are arranged on the compressing nut. According to the combined locknut, a workpiece on the bolt is fastened through the fastening nut; then the bolt is sleeved with the lock washer and the spring washer sequentially, and the locking lug on the lock washer is embedded into the limiting groove in the fastening nut; the compressing nut is screwed and compressed; the returning stopping lug on the lock washer is inserted into tooth grooves of the anti-slip teeth on the compressing nut, so that the fastened fastening nut, the lock washer, the spring washer and the compressing nut can form a fastening body; a large frictional force remains between the body and threads of the bolt all the time. Therefore, the combined locknut has a good locking effect; and in addition, the combined locknut is simple to operate, and can be repeatedly used.

The invention discloses an anti-loosening tent ground screw which comprises a ground screw body and an insertion piece. The ground screw body is in a cylindrical rod shape, and a tip is arranged on the lower portion of the ground screw body; a flange is arranged on the upper portion of the ground screw body, and a fixing hole is formed in the flange; a blind hole is formed in the ground screw body, and an upper set of connecting holes and a lower set of connecting holes are formed in the side surface of the ground screw body; each set of connecting holes comprises two symmetrically-formed circular holes which communicate with the blind hole, and each circular hole is internally provided with a telescopic device which comprises an anti-loosening block, a spring and a limiting block; one ends of the springs are connected with the anti-loosening blocks, and the other ends of the springs are connected with the limiting blocks; the anti-loosening blocks are arranged on the outer side of the ground screw body, and the limiting blocks are circular and are arranged in the blind hole; and the lower portion of the insertion piece is arranged in the blind hole, and the upper portion of the insertion piece is provided with a handle. The anti-loosening tent ground screw is simple in structure, convenient to use, wide in applicability, safe, reliable and high in tension resistance.

The invention discloses an axle-mounted brake disc device for a railway vehicle. The axle-mounted brake disc device comprises a disc body, a disc hub, a space ring and bolts, a connecting claw bolt hole is formed in each disc body connecting claw, bolt holes in a flange are flange step holes composed of flange small-diameter holes in the outer side and flange large-diameter holes in the inner side, the bolt holes in the space ring are space ring step holes composed of space ring small-diameter holes in the outer side and space ring large-diameter holes in the inner side, elastic pins are arranged in at least two of all the connecting claw bolt holes, the front ends of the elastic pins are inserted into the flange large-diameter holes, the rear ends of the elastic pins are inserted into thespace ring large-diameter holes, the elastic pins and the flange large-diameter holes are in interference fit, the connecting claw bolt holes and the space ring large-diameter holes are in interference fit, the diameters of inner holes of the elastic pins are less than the diameters of the flange small-diameter holes and the diameters of the space ring small-diameter holes, the bolts pass throughthe flange step holes, the connecting claw bolt holes and the space ring step holes, the tail parts of the bolts penetrate out of the space ring, and dished spring pieces and self-locking nuts are connected to the tail parts of the bolts. The axle-mounted brake disc device has a self-centering function when being assembled, and connecting loosening can be well prevented.

The invention discloses a superconducting magnet apparatus in a magnetic resonance imaging system. The superconducting magnet apparatus comprises a magnet inner cylinder and an outer cylinder arranged on the inner cylinder in a sleeving manner; an annular sleeve is arranged on the inner cylinder; inner wire grooves are formed in the annular sleeve; a wire of each magnet is wound in the corresponding inner wire groove; two arc-shaped clamp bodies are arranged on the annular sleeve; upper wire grooves matched with the inner wire grooves are formed in the clamp bodies; multiple through holes which pass through the inner wire groove walls to be connected with the inner wire grooves are formed in the annular sleeve; and a compressing mechanism for compressing the arc-shaped clamp bodies is arranged on the outer cylinder. The magnet apparatus provided by the invention is good in cooling effect and firm in fixation, and more importantly, the magnet inner cylinder and the outer cylinder are high in hoisting stability, and the coil does not suffer from displacement easily, so that the superconducting magnet apparatus does not suffer from quench easily and is high in operation stability.

The invention relates to an engagement and disengagement module of an intelligent lock. The engagement and disengagement module comprises a shell, a handle head, an engagement and disengagement rotating block, an engagement and disengagement sleeve, an engagement and disengagement pin and an electric push rod used for driving the engagement and disengagement pin. The handle head and a center holeof the engagement and disengagement sleeve are in running fit. A convex block is arranged on the periphery of the position, corresponding to the center hole, of the handle head. A reversing screw of the convex block is provided with an eccentric connecting hole. Holes of the engagement and disengagement sleeve are through holes. The reversing screw penetrates through the corresponding through holeto be connected with the eccentric connecting hole. A reset mechanism is arranged between the engagement and disengagement rotating block and the engagement and disengagement sleeve. The reversing screw of the engagement and disengagement module can be used for fixing the handle head besides limiting the rotating direction of the engagement and disengagement rotating block; and the reversing screw and the handle head are fixed eccentrically, a handle does not need to be demounted during reversing so as to avoid the situation that accumulated gaps are generated after the handle is demounted and mounted, and consequently normal work of the engagement and disengagement module is influenced.