119 results about "Screw loosening" patented technology

In judging loosening of a crew, a measuring section measures a position of a bit as a relative position in relation to a placement surface of a screw supplying device when the screw is acquired from the screw supplying device. The measuring section also measures the position of the bit as a relative position in relation to a workpiece surface when fastening of the screw onto a workpiece has been completed. A judging section judges that screw loosening has not occurred when, based on the first and second bit positions, a difference between the first and second bit positions falls within an allowable range. The judging section judges that screw loosening has occurred when the difference does not fall within the allowable range.

The invention discloses a screw loosening monitoring device and system. The device comprises an LC sensor, a signal processing chip, a control chip and a wireless communication module which are electrically connected in sequence. The LC sensor is a coil. The LC sensor is used for measuring an inductance signal between the LC sensor and detected metal. The signal processing chip is used for converting the received inductance signal into a position signal. The control chip converts the received position signal into distance data. The wireless communication module is used for transmitting the received distance data to a background computer. Compared with an existing screw loosening monitoring device in the market, the device provided by the invention is simple in structure, convenient to install, low in cost, high in monitoring precision and wide in utilization range; in addition, regular inspection by maintenance personnel is not needed, online detection is practically realized, the manpower is substantially saved, the working efficiency of bolt monitoring is improved, and the working efficiency of the equipment is improved.

The invention discloses equipment for unscrewing a terminal bolt of a circuit breaker. The equipment is characterized by comprising a flat vibration feeder (2), wherein a discharge hole of the flat vibration feeder (2) is connected to a corresponding notch on a fixture main plate (5); the fixture main plate (5) is provided with a feeding push block (4) and a discharging push block (15); the feeding push block (4) is driven by a feeding cylinder (3); the discharging push block (15) is driven by a discharging cylinder (16); one side of the fixture main plate (5) is provided with a motor (6); the rear part of the motor (6) is connected with a piston rod of a motor feeding cylinder (9); and an output shaft of the motor (6) is provided with a screwdriver head (18). The equipment has a reasonable structure, solves the problem of low efficiency of the conventional manual production mode, can automatically feed a workpiece and unscrew the bolt through the screwdriver head to reach specified length, and can analyze the unscrewing condition of the bolt to identify whether the bolt is a qualified product or a defective product, so that production efficiency is improved, and labor intensity is reduced.

The invention discloses a pivot connection device of a glasses earpiece and an endpiece; the endpiece is disposed outside a glasses frame; the glasses earpiece is connected with the endpiece, and can rotate around a pivot relative to the endpiece between an unfolding position and a folding position. A long sheet body is disposed at the connection end position of the endpiece and the earpiece; a pivot body is formed between a back groove and a front through hole; a clamping hole is disposed in front of the through hole. A long sheet body is disposed at the connection end position of the earpiece and the endpiece; a bend is disposed at the front end; a long elastic sheet is disposed at a center position behind the bend and extends forwards along a longitudinal direction; an arc end part bending outwards is disposed at the front end of the elastic sheet. The earpiece is mounted at the outer side of the endpiece; the elastic sheet arc end part extends out from the inner surface of the endpiece, passes through the through hole, and elastically presses the pivot body, and the bend is clamped in the clamping hole. The pivot connection device of the glasses earpiece and the endpiece of the invention needs no weld point or screw device, and thus has no problems of screw loosening or loss; the structure is simple; the manufacturing cost is low; the installation is convenient; and the service life is long.

A screw loosening prevention structure (15), that restrains the opposing rotation of a cylinder head (5) (first member) and a cylinder tube (4) (second member) that are coupled together by the screwing action of screws (11, 12), is provided with a first hole (16) that is formed in the cylinder head (5), a second hole (17) that is formed in the cylinder tube (4), a pin (18) that is inserted into the second hole (17), and an energizing member (spring (19)) that is inserted into the second hole (17) and applies energy to the pin (18) in the direction of pushing the pin out of the second hole (17). In a state where the cylinder head (5) and the cylinder tube (4) are engaged, the pin (18) is inserted through the first hole (16) and the second hole (17).

The embodiments of the invention provide a fault monitoring and early warning method of an unmanned aerial vehicle, the unmanned aerial vehicle and a storage medium, and belongs to the field of unmanned aerial vehicles. The method includes the following steps: obtaining power output percentages of shaft motors of the unmanned aerial vehicle; and determining whether an early warning is generated ornot according to whether the power output percentages exceed a set threshold. The invention also provides the unmanned aerial vehicle using the fault monitoring and early warning method. The fault monitoring and early warning method finds out safety hazards such as screw loosening, machine arm loosening and motor bearing damage in time by monitoring the abnormality of the power output percentagesof the shaft motors of the unmanned aerial vehicle, thereby improving the flight safety of the unmanned aerial vehicle.

The invention discloses a screw loosening agent and a preparing method thereof. According to the technical scheme, the screw loosening agent is mainly prepared by weight by the raw materials which are 70-90 parts of solvent, 5-20 parts of antirust agents, 1-10 parts of corrosion-resistant agents and 1-10 parts of penetrants. The invention further discloses the preparing method of the screw loosening agent. The screw loosening agent has the functions of rust loosening, rust removing, penetrating, lubricating, corrosion resistance and the like, using is convenient, price is reasonable, the problem that traditional disassembling is high in difficulty and bad in effect is solved, manpower and material resources are saved, cost is saved, and great convenience is brought to production and life.

The invention belongs to the technical field of thread loosening. A thread loosening analysis method based on fretting friction theory is provided, which includes the analysis of stress and looseningof thread model, the analysis of fretting slip state, the establishment of fretting slip model, the establishment of simulation model, the analysis of fretting slip state based on grain dissipation energy, and the analysis of fretting slip state using fretting diagram. On the basis of fully considering the influence of fretting friction on thread loosening, a thread loosening analysis method basedon fretting friction theory is presented, A mathematical model of that contact surface is established, theoretical formulas of stress distribution and pressure distribution at the screw loosening interface are established, and the interface stress and pressure are simulated to analyze the loosening phenomenon, and the loosening state is clearer by introducing the theory of screw dissipation energy and fretting diagram, which provides a reference for the future research on this kind of screw loosening. For the above reasons, the present invention can be widely popularized in the field of thread loosening.

The invention discloses a locking member, a locking structure and an air conditioner. The locking member comprises a plate body part; a rotary shaft is arranged at one end of the plate body part; a clamping-connection part is arranged at the other end of the plate body part, thus, locking of the two parts can be achieved, and compared with the traditional mode that the two parts are fixed throughscrews, the fixing efficiency between the two parts is improved; and meanwhile, the screw loosening phenomenon caused by repeated screw turning can be avoided, and thus damage of a fixed structure canbe effectively avoided.

The invention discloses a multi-unit adjustable intelligent interbody fusion cage which comprises a fixing plate, the upper end of the fixing plate is of a square structure, the lower end of the fixing plate is of an arc-shaped structure, a plurality of adjusting units are evenly arranged on the fixing plate, each adjusting unit comprises two adjusting blocks, and the two adjusting blocks are arranged on the two sides of the fixing plate respectively. The adjusting blocks are connected with the fixing plate through the linear moving modules, and the edge formed by the multiple adjusting blocksis attached to the edges of the two sides of the fixing plate to form a whole. The multiple adjustable units are innovatively designed, the adjustable units are perfectly attached to the upper end plate and the lower end plate by adjusting the different telescopic heights of the adjustable units, the curvature of the cervical vertebra operation segment can be better adjusted, the contact area ofthe implant and the end plate is increased, the gap between the implant and the end plate is reduced, and therefore stress concentration is avoided; and complications such as screw loosening, bone resorption around the implant and fusion cage sinking are reduced.

The invention discloses a wiring terminal with a screw loosening alarming function and belongs to the technical field of power wiring terminals. The wiring terminal with the screw loosening alarming function comprises a terminal seat, the terminal seat is provided with a threaded hole, inside which a press screw is arranged, the right wall of the terminal seat is provided with a wire hole, and theleft wall of the terminal seat is provided with a longitudinal groove; the bottom of the longitudinal groove is provided with a transverse groove communicated with the longitudinal groove, the rightof the transverse groove is communicated with the threaded hole, the inside of the transverse groove is provided with a press plate, the left wall of the transverse groove is fixedly provided with a spring which is connected with the press plate, and the left of the press plate is fixedly provided with a moving plate which is arranged inside the longitudinal groove. A maintainer can determine whether the screw is loose by observing the position of the moving plate and a top plate and further fasten the screw, so that the working efficiency can be greatly improved; besides, the press plate is painted with insulating coating which is good in insulating performance and excellent in mechanical performance, so that the service life as well as safety of the wiring terminal with the screw loosening alarming function can be greatly improved.

The invention discloses a clamping holding structure and a mobile terminal. The clamping holding structure comprises a pedestal, a screw hole column, a bolt and an elastic component. The screw hole column is arranged on the pedestal. The bolt is movably connected to the screw hole column. One end of the elastic component is connected to the pedestal, and the other end of the elastic component, which is relative to the pedestal, is connected to the bolt. A height of the elastic component is greater than or less than a height of the screw hole column. The pedestal, the screw hole column, the bolt and the elastic component are conductive components. In the invention, a pretightening force of a screw is increased so that the screw is guaranteed to be fully intersected with a screw thread in the screw hole column and screw loosening is prevented; reliability of assembling contact among the elastic component, the screw hole column and the pedestal is guaranteed; and a condition that poor contact among the elastic component, the screw hole column and the pedestal influences grounding performance of a metal shell and a metal frame is avoided.

The invention discloses an RFID (radio frequency identification) tag and a screw loosening state monitoring system based on the same and belongs to the field of screw state monitoring. The invention aims to solve the problems of leakage detection and false detection in the prior art. The structure of the RFID tag is mainly composed of an antenna and a tag chip; when the chip and the antenna are connected with each other, the tag can be accessed through a reader-writer; and a metal screw body serves as a switch-like mechanical structure and determines the switching of the disconnection state and connection state of the tag chip and the tag antenna, that is, the tag can be read and communicate with the reader-writer when the screw is firmly fixed; and the chip is disconnected from the tag antenna when the screw is loosened, and as a result, communication between the tag and the reader-writer is interrupted. The switch-like mechanical structure can be integrated in the tag antenna or an impedance matching network separately so as to form an integrated body with the tag, and therefore, the reliability of screw state detection is improved.

The invention provides a light source carrier with Internet of Things man-machine interaction and self inspection functions, and an interactive method. The light source carrier comprises an outer shell, multiple detection modules, a processing module and a mobile terminal, wherein a display screen and LED back light sources connected in parallel are arranged in the outer shell; each LED back light source is driven by a driver; the multiple detection modules are distributed on the connecting circuits of the LED back light sources, and the detection modules are connected with the processing module; the processing module is used for performing information collection and processing, and integrating wireless signal transmitting and wireless signal receiving; the mobile terminal integrates wireless signal transmitting and wireless signal receiving and is connected with the processing module in a signal feedback manner; and the processing module feeds back the processed information to the mobile terminal in real time. A processor is mainly connected with an LED back light source detection module, a box door airtightness detection module, a screw loosening detection module and an urban Internet of Things module, and transmits the problem of an advertisement lamp box to the mobile terminal, so as to feedback the problem to a maintenance staff in time, so that the maintenance staff can find the problem and the key position of the problem immediately in order to perform maintenance conveniently.

Provided is a punched point anti-loosening method for sunk screw connection. 2-4 punched point grooves or punched point holes are formed on the circumferential edge of the opening of a sunk screw hole by mechanical processing, the width or diameter of the opening of the punched point groove or punched point hole is 1.2mm-2.5mm, the punched point grooves or punched point holes are evenly distributed on the circumferential edge of the opening of the sunk screw hole, and the central line of the punched point groove or punched point hole is perpendicular to the central line of the sunk screw hole. In connection, a punch is abutted against the part of the screw head of the sunk screw opposite to the punched point groove or punched point hole prefabricated on the edge of a sunk screw hole in a to-be-connected member, and a punching tool is hit, so that the screw head of the sunk screw deforms to get squeezed into the punched point groove or punched point hole prefabricated on the edge of the sunk screw hole in the to-be-connected member, therefore achieving the purpose of mechanical motion stop and loosening prevention for screw. The inventive method has the characteristics of simple and easy operation, reliable screw loosening prevention, and wide application. The punched point groove or punched point hole is round, V-shaped or conical.

The invention discloses an automatic inner plate screw loosening system for a waste electric energy meter. The automatic inner plate screw loosening system comprises a screw loosening mechanism, a screw recycling system, a three-dimensional driving mechanism driving the screw loosening mechanism to advance, and a controllable screw suction mechanism synchronously advancing along with the screw loosening mechanism. The three-dimensional driving mechanism drives the screw loosening mechanism to advance to the position of an inner plate screw for screw loosening operation, the controllable screw suction mechanism sucks the screw which is screwed off, and the three-dimensional driving mechanism is used for conveying the screw to the screw recycling system to be recycled. By means of the automatic inner plate screw loosening system, automatic operation of screw loosening of an inner plate of the electric energy meter can be achieved, the work efficiency of electric energy meter recycling is obviously improved, and automation of electric energy meter recycling is better achieved.

The invention belongs to the field of rail traffic rail detection and provides a rail traffic rail detection system based on acoustic waves. The rail traffic rail detection system based on acoustic waves comprises an impact hammer, a sound pick-up, a signal amplifier and a microprocessor; the impact hammer is a metal hammer; by using the impact hammer to strike a rail, the rail produces a sound; the sound pickup receives the sound produced by the rail; after amplifying a sound signal received by the sound pickup, the signal amplifier outputs the sound signal to the microprocessor; the microprocessor calculates the received signal by using a time domain-to-frequency domain algorithm to obtain frequency spectrum data of the received signal; the calculated frequency spectrum data are comparedwith hub frequency spectrum saved in the system; and therefore, rail cracks and screw loosening are detected.

The invention discloses an aluminum material pressing mold and relates to the field of aluminum material processing. The aluminum material pressing mold comprises a bottom plate and a mold main body;the top of the bottom plate is fixedly connected with four groups of support columns; the tops of the support columns are fixedly connected with a support plate; the upper surface of the support plateis rotatably connected with a rotating plate; the mold main body is movably inserted into a mold hole and a clamping hole; an outer cylinder main body is movably inserted into an outer cylinder groove; and the side, close to the outer cylinder main body, of a clamping block is provided with a clamping slot; the sidewall of the clamping block is provided with a locking mechanism corresponding to the clamping block. The aluminum material pressing mold realizes that the mold at the bottom is convenient to replace in an aluminum material pressing process; therefore, when the mold is to be replaced, the operation is simple and convenient; time and efforts are saved; the locking mechanism achieves a good fixation effect on the mold main body; compared with a traditional bolt fixation method, the way of the aluminum material pressing mold prevents the occurrence of teeth slip caused by loosening of a screw; the locking mechanism can be repeatedly used for many times without being damaged; reliable work is also achieved; and the aluminum pressing effect is guaranteed.

The invention discloses a shield for a base station antenna. The shield comprises a shield body and a support, wherein the shield body stretches across a radiator of the base station antenna and comprises a front wall, a first side wall, a second side wall, a first rear flange and a second rear flange, wherein the first side wall and the second side wall extend backwards from the front wall, the first rear flange and the second rear flange extend inwards from the corresponding first side wall and second side wall, the support includes a body, and a first mounting flange and a second mounting flange extending forward from the body, the first mounting flange and the second mounting flange are matched with the corresponding first rear flange and the corresponding second rear flange of the cover body so as to connect the shield body to the support. The shield is advantaged in that appearance of the shield is attractive, and the possibility of screw loosening caused by lateral wind force isfurther reduced.