753results about "Load modified fasteners" patented technology

A fastener and a system, apparatus, and method for monitoring a fastener are described. The fastener includes a head portion, a shank portion, a transponder, and a compression spring, wherein the head portion includes a mounting portion, and wherein the transponder is disposed in the mounting portion of the head portion. The transponder is arranged to monitor the shank portion, and includes an ultrasonic sensor and a signal processing circuit. The ultrasonic sensor is affixed to a transducer hosting surface, and is urged against the transducer hosting surface by placement of the printed circuit board in the head portion with the compression spring intervening therebetween. The ultrasonic sensor communicates with the signal processing circuit via the compression spring. The signal processing circuit captures a signal from the ultrasonic sensor and transforms the signal into a parameter corresponding to a tensile force being exerted by the fastener.

The present invention belongs to the field of tightening control methods and automatic tightening technology, and discloses a tightening control method and automatic tightening device for an aero-engine rotor based on bolt preload feedback. The automatic tightening device is based on a main body structure and is provided with a rotary table structure, a spherical guide structure and a skid platform structure to achieve the degree of freedom of movement of the automatic tightening device for an aero-engine rotor within an inner cavity space of the rotor, enabling the tightening structure to be fed and withdrawn; in addition, a preload detection structure is provided, which relies on an ultrasonic preload measurement system to measure a real-time preload of a bolt during a tightening process and transmit the value of the preload to a tightening gun to achieve a tightening method for preload feedback control.

To inexpensively provide an anti-loosening wedge washer device capable of firmly preventing loosening caused by aging such as wood shrinkage for a long period of time, in joint parts of a wooden building using bolts and nuts.SOLUTION: In a device that prevents loosening of screws caused by shrinkage of joined parts by increasing a thickness of a washer, a general shape of the washer is a frustum-shaped lid washer, and a frustum-shaped collar is protruded coaxially with a concave surface side bolt insertion hole, and an annular wooden wedge with a volume larger than a tapered space formed inside the washer is pressed into the space by screw fastening action during fastening, so that the shrinkage of the joined parts can be compensated for by expansion restoring force of the annular wooden wedge stored in the washer. Therefore, a gap caused by wood shrinkage is replaced by the increased thickness of a washer device, thereby preventing loosening of a joint part for a long period of time.SELECTED DRAWING: Figure 1

A fastening device for keeping at least first and second parts assembled, the fastening device comprising a tubular body passing through the first and second parts, an expansion nut and a screw that is seated in the tubular body and cooperates with the expansion nut. To facilitate the removal of the fastening device, the screw has at least one shape, such as a recess positioned on the transverse face thereof, to prevent it from rotating using a first tool, and the expansion nut has at least one shape, such as a flat, to unscrew it using a second tool. Also an assembly comprising at least one such assembly device as well as a removal method.

The invention belongs to the technical field of mechanical fasteners and intelligent manufacturing, and discloses an intelligent bolt system based on embedded torque monitoring and artificial intelligence (AI) analysis and an application method of the intelligent bolt system. According to the intelligent bolt, an inner cavity is formed in a screw rod, a strain gauge is fixed in the inner cavity, and a strain signal is led out to a signal output interface in a screw head through a signal transmission line. And an external data terminal obtains real-time strain data from the interface and converts the real-time strain data into tightening torque by using a calibration relation. And further inputting the torque data into an artificial intelligence analysis platform, analyzing and predicting the fatigue life, the loosening risk and the use state of the bolt through a large language model, deep learning and an expert system algorithm, and giving a maintenance strategy suggestion. According to the method, real-time state monitoring and intelligent decision support can be achieved under the normal service state of the bolt without an external additional sensor, the connection quality, the maintenance efficiency and the safety are greatly improved, and the method is suitable for various fields of aerospace, gas turbines, steam turbines, vehicles, bridges, energy equipment, precision machinery and the like.

The invention provides an internal thread and a threaded connection pair, and belongs to the technical field of threaded connection. The internal thread is a meter-made thread or an MJ thread, a thread profile line of the internal thread comprises a thread top, a straight line section, a thread bottom and a straight line section which are connected in sequence, the thread angle of the internal thread is 60 degrees, the thread pitch is P, the width of the thread top is defined as Cn, the width of the thread bottom is defined as Cn2, the thread height is defined as hn, Cn is larger than 0 and smaller than C0, # imgabs0 #, and C0 is the width of the thread top of the standard meter-made internal thread or the MJ internal thread. The tooth thickness of the internal thread teeth is reduced, the rigidity of the internal thread teeth can be reduced, the bending deflection of the internal thread teeth can be improved, and therefore when the thread connection pair bears alternating loads, the internal thread teeth can generate larger bending deformation to absorb inertia force generated by the alternating loads, and therefore the thread connection pair can bear the alternating loads. Therefore, the stress of the root of the external thread under the action of the alternating load is reduced, and the fatigue performance of the external thread is improved.

A method of securing two components under this disclosure could be said to include receiving an input including a commanded pressure for achieving a pre-stretch on a shaft (46) housed within a fixture (34). The shaft (46) is coupled to a first component (36) and extending through a second component (38). In response to receiving the input, causing hydraulic fluid to be provided to the fixture (34) at a pressure based on the commanded pressure, to initiate the pre-stretch on the shaft (46). A measured stretch of the shaft (46) is received from a sensor. Determining if the measured stretch is within a range of acceptable stretch; and based on a determination that the measured stretch is within the range of acceptable stretch, causing an indication of acceptability. The indication of acceptability being an instruction to tighten a nut (48) to secure the shaft (46) to the second component (38). A system and a controller are also disclosed.

A torque control fastener system having a fastener nut, a helical wire insert, and a shaft, where the nut and helical wire insert have unique hardness and coefficient of thermal expansion relationships that produce improved performance.

There is provided a sensor unit for a fastener assembly, the sensor unit comprising a mounting arranged to rigidly attach the sensor unit to, or adjacent to, a fastener assembly; and a sensor, that is an optical flow sensor or an inductive sensor, configured to sense movement of the fastener assembly. The sensor unit may comprise a processor arranged to process the output of the sensor to detect loosening of the fastener assembly and to output a signal representing the status of the fastener assembly. The sensor unit may comprise a wireless communication unit arranged to communicate the signal.

A fixing bolt (103) for fixing a stranded conductor wire (401a, 401b) has a tapered section (215) extending along a central axis direction (207) of the fixing bolt (103). The tapered section (215) establishes an electrical contact with the stranded conductor wire (401a, 401b). A first portion (305) of the tapered section (215) is an arched cone frustum that is arched with respect to the central axis direction (207).

The invention provides a combined nut for a double-end bolt and a double-end bolt assembly, and belongs to the technical field of bolt connection. The combined nut comprises a protection nut embedded in the structure body and a breakage nut connected with the end, stretching out of the structure body, of the stud, the crest width of an internal thread of the protection nut is Cnb, the root width of the internal thread of the protection nut is Cnb2, the height of the internal thread of the breakage nut is hnb, the crest width of an internal thread of the breakage nut is Cnd, the root width of the internal thread of the breakage nut is Cnd2, the height of the internal thread of the breakage nut is hnd, and Cnb is larger than 0 and smaller than Cnd. The rigidity of the internal thread teeth of the protection nut is smaller than that of the internal thread teeth of the broken nut, the bending deflection of the internal thread teeth of the protection nut is larger, and when the stud assembly bears an alternating load, the internal thread teeth of the protection nut can generate larger bending deformation to absorb inertia force generated by the alternating load, so that the stability of the stud assembly is improved. And the fatigue performance of the external thread of the stud at the protective nut is improved, so that the probability that the fracture position occurs at the fracture nut is higher.

The invention provides an internal thread and a threaded connection pair, and belongs to the technical field of threaded connection. The internal thread is a meter thread or an MJ thread, a thread profile of the internal thread comprises a thread top, a straight line section, a thread bottom and a straight line section which are connected in sequence, the thread angle of the internal thread is 60 degrees, the thread pitch is P, the thread height is hn, a groove is formed in the thread bottom of the internal thread, the groove width of the groove is defined as g, the maximum depth of the groove is hd, and then # imgabs0 is obtained. The bending deflection of the internal thread tooth is improved, at the moment, the internal thread is equivalent to a spring with reduced rigidity, and therefore when the thread connection pair bears alternating loads, the internal thread tooth can generate larger bending deformation to absorb inertia force generated by the alternating loads, and therefore the stress of the tooth bottom of the external thread under the action of the alternating loads is reduced; and the fatigue performance of the external threads is improved.

Provided is a housing comprising, a plastic assembly comprising a plastic “B” cover having one or more snap on plastic hooks protruding therefrom and one or more grooves cut therein, a display panel sandwiched into the plastic assembly behind the plastic “B” cover, in front of an electromagnetic interference shielding (EMI) material, and a plastic “A” cover having one or more grooves cut therein, the plastic assembly held together by one or more clips sliding along each side of the plastic assembly, and within the one or more grooves of the plastic “B” cover and one or more snap on plastic hooks and the one or more grooves of the plastic “A” cover, the EMI material has one or more press-on grommets which are pressed onto one or more plastic buttons protruding from a surface of the plastic “A” cover to secure the EMI material to the plastic “A” cover.

The invention relates to the technical field of fasteners, and provides a high-strength bolt and a preparation method thereof.The blank comprises a base body and a reinforcing phase, and the base body is composed of, by weight, 0.25%-0.41% of C, 0.15%-0.37% of Si, 0.30%-0.90% of Mn, 0.4%-1.50% of Cr, 0.15%-0.55% of Mo, 0.5%-1.2% of Ni, 0.1%-0.15% of Cu, 0.01%-0.05% of Nb, smaller than or equal to 0.015% of P, smaller than or equal to 0.003% of S, smaller than or equal to 0.005% of N and the balance iron and inevitable impurities; the reinforcing phase is composed of zirconium oxide and aluminum oxide; the weight ratio of the matrix to the reinforcing phase is 100: (3-8). According to the technical scheme, the problem that in the prior art, the yield strength and tensile strength of a bolt are low is solved.

The present invention relates to a detection module for detecting a failure of a fastening device (100), comprising: an inner sleeve (210, 210") and an outer sleeve (220, 220'); an elastic element (230) arranged between the overlapping sections of the outer sleeve (220, 220') and the inner sleeve (210, 210") in the direction of the longitudinal axis of the fastening rod; and a displacement sensor (240) arranged on or in the outer sleeve (220, 220') on a section of the outer sleeve (220, 220') that can be arranged around the inner sleeve (210, 210"), wherein the displacement sensor (240) is able to measure a relative displacement of the outer sleeve (220, 220') and the inner sleeve (210, 210") as they move relative to each other in the direction of the longitudinal axis of the fastening rod, and to generate an electrical signal indicating the relative displacement of the outer sleeve (220, 220') and the inner sleeve (210, 210").The present invention also relates to a method for detecting a failure of a fastening device using such a detection module, and to a fastening system comprising a fastening device and such a detection module.

A torque control fastener system having a fastener nut, a helical wire insert, and a shaft, where the nut and helical wire insert have unique hardness and coefficient of thermal expansion relationships that produce improved performance.

A sensorized fastener (1), in particular a screw, having a shank with a cavity (5) laterally delimited by a lateral surface (5III) and extending between an opening (51), through which the cavity (5) faces the outside of the fastening body (100), and an end portion (511); wherein the sensorized fastener (1) has a pin (10) with a support (11) formed by a head (14), a foot (16) and an intermediate portion (15), which is interposed between the head (14) and the foot (16), and a sensing element (12) which is applied to the intermediate portion (15); wherein the pin (10) is inserted, at least partially, through said opening (51) within the cavity (5), so that the foot (16) of the pin (10) is fixed to the end portion (511) of the cavity (5).

A biasing system (101) for use with a fastener (120) is disclosed. The biasing system (101) can include a sleeve (130, 130b) configured to be disposed about a shank (122) of a fastener (120) and operable to form at least a portion of a first load path between the fastener (120) and a component (110) coupled to the fastener (120) to preload the fastener (120) through the sleeve (130a, 130b). The biasing system (101) can also include a spring (140) configured to be associated with the sleeve (130a, 130b) and operable to form at least a portion of a second load path parallel to the first load path between the fastener (120) and the component (110) to facilitate biasing the fastener (120) away from the component (110).

The attraction system includes a first component, a second component, a fixture configured to couple the first component to the second component, a radio frequency identification (RFID) tag including a torque stripe extending between the fixture and a reference point on the attraction system, and the RFID tag configured to emit a radio frequency (RF) signal when the torque stripe is intact, and an RFID reader configured to detect the RF signal.

Instrumented nut, clamping sleeve, clamping device and method for tightening such a nut. The invention relates to an instrumented metal nut (10b) comprising a tubular body having a polygonal drive surface (14). The nut comprises, on at least one annular portion (34) of its outer surface: an electrically insulating layer (36) applied to the annular portion; a piezoresistive conductive polymer (38) whose ohmic resistance varies according to a stress exerted during tightening of the nut on a threaded fastener, said conductive polymer being applied to the electrically insulating layer; and at least two electrodes (40). Figure for the abstract: Figure 2

More easily detect loosening of the screw. 【Solution means】 In the fastening component, among the plurality of leaf spring portions of the washer, the leaf spring portion that is in contact with the portion of the back surface of the screw where there is no depression is pushed downward in the direction of pointing to the substrate by the back surface of the screw, and is electrically connected to any one of the plurality of conductive patterns. When one or more of the plurality of leaf spring portions are electrically connected to the plurality of conductive patterns, the plurality of conductive patterns are electrically connected to each other via one or more leaf spring portions.

The utility model discloses a large-span torsional shear type bolt assembly which comprises a torsional shear bolt, one end of the torsional shear bolt is movably connected with a wabbler, the side wall of the torsional shear bolt is movably connected with a gasket, one side of the gasket is fixedly connected with a preservative storage bag, and the torsional shear bolt is in threaded connection with a torsional shear nut. And one side of the torsional shear nut is fixedly connected with a crushing rod, and one side of the torsional shear nut is movably connected with one side of a preservative storage bag. The utility model relates to the technical field of torsional shear type bolts. Through cooperation of a torsional shear bolt, a gasket, a magnet ring, a sealing steel ring, a preservative storage bag, a torsional shear nut and a crushing rod, the space between the gasket and the torsional shear nut can be automatically coated with a rust remover when equipment is installed and fixed through the torsional shear bolt, workers do not need to manually coat the equipment with the rust remover, and the labor intensity of the workers is reduced; and meanwhile, the rust remover can be limited, the rust remover is prevented from splashing all around, and rainwater can be prevented from being directly poured on the side wall of the twist arrow nut.

A break-off bolt for securing a conductor within a connector includes a first thread section, a second thread section and a torque-limiting section arranged between the first thread section and the second thread section. The first thread section and the second thread section comprise the same external thread having a minor diameter. The torque-limiting section has at least one of no thread with an outer diameter larger than the minor diameter of the external thread or an external thread having a minor diameter larger than the minor diameter of the external thread of the first and second thread sections.

The disclosure relates to a method for producing load-indicating connection components. A connection element (10) and a piezoelectric ultrasonic transducer (20) are provided and interconnected. The method comprises forming a layer structure on the surface (14) of the connection element (10). The layer structure comprises, in this order, proceeding from the surface (14) of the connection element (10): a first solder layer (16); a reactive layer (30); a second solder layer (22); and the piezoelectric ultrasonic transducer (20). The reactive layer (30) is designed for an exothermic reaction by activation with heat, with electromagnetic radiation or with electric current. Subsequently, the piezoelectric ultrasonic transducer (20) is pressed toward the connection element (10) in order to produce a specified contact pressure, and the reactive layer (30) is activated. The disclosure also relates to a load-indicating connection component of this type.

The present application belongs to the technical field of wind power equipment connecting structure, and particularly relates to a threaded connection assembly, a blade device and a wind power equipment. The threaded connection assembly comprises: an inner threaded connecting piece; and an outer threaded connecting piece, a radially outer side surface of the outer threaded connecting piece is provided with an outer thread, the outer thread is threadedly matched with the inner thread, in the axial tensile stress direction of the outer threaded connecting piece, the outer thread and the inner thread form a plurality of threaded areas, and an axial gap exists between the front side surface of the outer thread of the outer thread and the rear side surface of the inner thread of the inner thread adjacent to the front. Wherein, in the axial tensile stress direction, the axial gap in the threaded area in the front is greater than the axial gap in the threaded area in the rear. Through the technical scheme of the present application, different axial gaps are arranged between the threads in different threaded areas, so as to change the stress distribution according to the axial tensile stress change, so that the overall stress distribution is more uniform, which is beneficial to prolong the service life and reduce the maintenance cost.

Provided is an apparatus for providing a secure tension connection, the apparatus including a fastener) with a flange for interaction with a shank, a plurality of lifting elements, and a plurality of spacers. Also provide is a wind turbine with such an apparatus, a tool for securing an apparatus and a method for providing a secure tension connection.

The invention relates to an assembly screw comprising at least a threaded part (12A) and a non-threaded part (12C), the non-threaded part being provided with a strain gauge (22) that is sensitive to the instantaneous elongation of the non-threaded part and with an RFID tag (24) connected to the strain gauge by a wired link, the assembly allowing the wireless transmission of an electrical resistance value of the strain gauge representative of the instantaneous elongation.