61results about How to "Increase self-locking ability" patented technology

The utility model discloses a ring main unit temporary grounding device, which relates to the ring main unit technology field, and comprises a disc, the bottom of the disc is connected with an insertion rod, the disc is inserted into the ground through the slender insertion rod, a hand wheel drives a drill rod to rotate, the drill rod is inserted into the ground more deeply, and spiral lines on the surface of the drill rod can increase the friction force between the drill rod and the ground. The contact area between a rectangular plate and soil can be increased by inserting the rectangular plate into the ground, so that the stability of the structure is improved, the contact area between the rectangular plate and the ground is further increased by sliding out a sliding plate in a sliding groove, and the bottom of the rectangular plate and the sliding plate are inserted into the soil more easily by arranging a chamfer; and the first threaded rod rotates to conveniently push the second rectangular block to drive the sliding plate to extend out.

The invention relates to the technical field of optical fiber connection, in particular to an optical fiber quick connector which is used in cooperation with an on-site optical fiber, the on-site optical fiber comprises a protective sleeve, a coating layer and a fiber core from outside to inside, and the on-site optical fiber comprises a protective cover, a front installation shell, a dustproof sleeve, an insertion core, an embedded optical fiber, a rear installation shell, a first pressing block, a second pressing block, a clamping spring, a push button and an installation rail. The device further comprises a clamping assembly, a fixing assembly and a clamping assembly. According to the optical fiber quick connector, the clamping spring is clamped through the clamping assembly, and meanwhile, the friction force between the extrusion block and the sliding groove is increased through the counter-acting force of the clamping spring, so that the extrusion block is prevented from deviating from the original position when the connector vibrates and the like, and then the stability of the clamping effect on the clamping spring is guaranteed; and meanwhile, the counter-acting force of the clamp spring on the clamping assembly limits the displacement of the fixing assembly through the push button, so that the limiting and fixing effects of the fixing assembly on the clamping assembly are ensured, and the butting and clamping and fixing effects on the on-site optical fibers are further ensured.

The invention discloses a manufacturing method of a titanium alloy self-locking nut for aviation. Comprising the following steps of hexagonal upsetting forming, first-stage solid solution heat treatment, machining forming, second-stage aging heat treatment, fluorescent flaw detection, surface treatment and performance testing. According to the invention, solid solution and aging heat treatment process parameters are optimized, and fluorescence flaw detection and surface treatment technologies are combined, so that the strength and the self-locking performance of the product are improved, and meanwhile, the risks of oxygen pollution and surface defects are reduced.

The invention discloses a one-way self-locking actuator, belongs to the field of actuators, solves the problem of poor self-locking effect of an existing actuator, and adopts the technical scheme that the one-way self-locking actuator comprises a shell, an input shaft arranged in the shell and used for receiving torque and a worm gear used for outputting the torque, and the worm gear is in transmission connection with the input shaft; the input shaft drives the worm gear to rotate so as to drive a load to move linearly, at least one of the worm gear and the input shaft is sleeved with a brake ring, the outer periphery of the brake ring is sleeved with an opening elastic pre-tightening ring, the first end of the opening elastic pre-tightening ring is fixed to the shell, and the second end of the opening elastic pre-tightening ring is in sliding connection with the brake ring. When the worm gear has the tendency to rotate in the reverse direction, the brake ring pushes the opening elastic pre-tightening ring to be folded inwards so as to tightly hold the brake ring to achieve friction self-locking, and when the worm gear has the tendency to rotate in the forward direction, the brake ring pushes the opening elastic pre-tightening ring to expand outwards so as to loosen the brake ring to achieve unlocking. According to the actuator, self-locking can be provided in time, and a good self-locking effect is achieved.

The invention discloses an endoscope handle and an endoscope system, and relates to the technical field of endoscopes. The endoscope handle comprises a shell assembly, a rotating wheel, a handle body and a self-locking piece. The handle is rotationally installed on one side of the shell assembly, the rotating wheel is rotationally installed in the shell assembly and comprises a connecting shaft, and the connecting shaft penetrates through the shell assembly and is in transmission connection with the handle; the side, facing the handle, of the shell assembly is provided with at least two clamping jaws, and the at least two clamping jaws are arranged on the peripheral side of the connecting shaft and are coaxial with the connecting shaft. The self-locking piece is arranged on the peripheral sides of the at least two clamping jaws, and when the self-locking piece is in a self-locking state, the self-locking piece extrudes the at least two clamping jaws and enables the at least two clamping jaws to clamp the connecting shaft; when the self-locking piece is in the unlocking state, the self-locking piece releases the at least two clamping jaws and enables the at least two clamping jaws to release the connecting shaft. According to the endoscope handle provided by the invention, the peripheral side of the rotating wheel can be stressed more uniformly in a self-locking state.

The application provides a grey water PH regulating device, relates to the technical field of PH regulation, and comprises an adjusting tank and a filtering device, a water inlet pipe is fixedly connected to one side of the adjusting tank, a water outlet is fixedly connected to the lower end of the one side of the adjusting tank, a filtering device is arranged on the inner wall of the adjusting tank and corresponds to the position of the water inlet pipe, the filtering device comprises a filtering pipe, the two ends of the filtering pipe are slidably connected with the inner wall of the adjusting tank, mounting plates are fixedly connected to the two ends of the filtering pipe, sliding blocks are fixedly connected to the two sides of the mounting plates, sliding grooves are formed in the inner wall of the adjusting tank and correspond to the positions of the sliding blocks, and the surfaces of the sliding blocks are slidably connected with the inner walls of the sliding grooves. The filtering device, the stirring device and the gas exchange device are designed, so that the problem that the traditional filtering device is inconvenient to disassemble and clean, is easy to cause the mesh holes to be blocked by sundries, affects the water inflow, and has low PH regulation precision is solved.

The invention discloses a pipeline type multi-stage biological deodorization device which comprises a bio-trickling filter structure section, a connecting device, a pre-wetting structure section and a fine treatment structure section, and the connecting height of the bio-trickling filter structure section and an odor output pipe can be adjusted through the bio-trickling filter structure section; the connecting device is arranged at the rear end of the top of the bio-trickling filter structure section; the pre-wetting structure section is arranged at the left moving end of the connecting device; the biological filtration fine treatment structure section is arranged at the right side moving end of the connecting device and can drive a center component in the top of the biological trickling filtration structure section to rotate and stir in a limiting manner, and the connecting device can drive the pre-wetting structure section and the biological filtration fine treatment structure section to synchronously expand and contract; the fillers in the left end and the right end of the top of the bio-trickling filter structure section are clamped and fixed; in conclusion, flexible adjustment, linkage and quick connection and disconnection of the structural sections are achieved through multiple assemblies, and the odor purification quality and the deodorization efficiency are high.

The utility model relates to a screw jack device for large -scale work piece support leveling, including support frame, screw rod, hand wheel, bracket and bolt, support frame whole presents the trapezoidal structure of little up big, is equipped with the mounting hole on the support frame, is equipped with the stop hole on the upper portion of mounting hole, hand wheel is installed in the stop hole, and can rotate relative to support frame, screw rod lower part passes in hand wheel and mounting hole in proper order, and is fixedly connected through trapezoidal thread and hand wheel screw thread cooperation, upper portion passes through bolt and bracket fixed connection, the utility model discloses through support frame adopts the trapezoidal structure of little up big, greatly enhanced the overall rigidity, effectively reduced the risk of falling when supporting large -scale work piece, provides the stable support foundation for large -scale work piece, guarantees the security of operation process, simultaneously through the trapezoidal thread cooperation of hand wheel and screw rod, single person can easily realize the lifting operation of screw rod, need not many people cooperation, significantly improves the operation efficiency, can satisfy the demand of large -scale work piece support leveling fast.

The utility model discloses an anti-dislocation chip mounting device which comprises a bottom plate, fixing rods are symmetrically and fixedly connected to the two ends of the top of the bottom plate, connecting rods are symmetrically and fixedly connected to the top of the bottom plate and located between the two fixing rods, and first positioning plates are symmetrically and slidably connected to the top of the bottom plate and located between the two fixing rods. Threaded holes are formed in the side walls of the two connecting rods, threaded rods are in threaded connection with the interiors of the threaded holes, second positioning plates are fixedly connected to one ends of the threaded rods, the second positioning plates are slidably connected to the top of the bottom plate, rotating handles are fixedly connected to the other ends of the threaded rods, and fixing plates are symmetrically and fixedly connected to the two ends of the bottom of the bottom plate. According to the chip mounting device, the two sides of the circuit board to be subjected to chip mounting can be clamped and fixed by controlling the position sliding of the two first positioning plates, and the middle parts of the other two sides of the circuit board to be subjected to chip mounting can be clamped and fixed by the position sliding of the two second positioning plates, so that the stability of the circuit board to be subjected to chip mounting is ensured, and better chip mounting is facilitated.

The utility model relates to an anti-side-leakage overturning type cup cover which comprises a bottom cover, an installation hole is formed in the bottom cover, a suction pipe is fixedly arranged in the installation hole in a penetrating mode, and a suction nozzle is fixedly arranged above the suction pipe in a sleeved mode. The sealing assembly is arranged above the bottom cover, the sealing assembly is used for sealing the suction nozzle, the sealing assembly comprises a fixing sleeve and a top cover, the fixing sleeve is fixedly arranged above the bottom cover, the top cover is hinged to the upper portion of the fixing sleeve, the top cover is arranged above the mounting hole and the suction nozzle in a covering mode, and a sealing plug is fixedly arranged in the top cover; by using the sealing assembly and the fixing assembly, the cup cover can be better protected against side leakage, liquid in the cup is prevented from leaking out of a straw opening in the cup cover when the cup inclines, sealing of the liquid in the cup is improved, meanwhile, the closed cup cover can be better protected against touch opening, and the cup cover is protected from being damaged. Water leakage caused by accidental opening of the cup cover is prevented, the self-locking effect of the cup cover can be further improved, and the cup cover is convenient to use.

The utility model relates to a gas column machine for producing buffer packaging material provides a kind of for the moulding mechanism and gas column machine of high efficiency sealing, the moulding mechanism includes upper pressure wheel, lower supporting wheel and elastic pressure mechanism, the outer contour of upper pressure wheel and lower supporting wheel is along the arc inner recess of central opening in axial direction, to form the embracing surface matched with the outer circle of inflation rod;The elastic pressure mechanism cooperates with the upper pressure wheel, the elastic pressure mechanism applies thrust to the upper pressure wheel along the direction towards inflation rod, the utility model is by using the inner recess between upper pressure wheel and lower supporting wheel and the joint action of "embracing" clamping inflation rod, upper pressure wheel produces adjustable clamping force to lower supporting wheel under the action of elastic pressure mechanism, realize "clamping-gas locking" function, solve the problem of air leakage, insufficient gas, unsatisfactory gas column caused by "clamping not tight".

The embodiment of the invention provides an intelligent door and window system, and relates to the field of windows. The intelligent door and window system comprises a window frame and a window body movably connected with the window frame. The driving mechanism is arranged between the window frame and the window body and used for driving the window body to move relative to the window frame so as to open or close the window body; the sensor module is used for sensing environmental rainfall information and generating a trigger signal; and the control unit is electrically connected with the sensor module and the driving mechanism and is used for controlling the driving mechanism to act according to the trigger signal. Through mutual cooperation of the sensor module, the control unit and the driving mechanism, automatic opening and closing of the door and window under rainfall and other environmental conditions are achieved, manual intervention is reduced, and use convenience and safety are improved.

The utility model relates to the technical field of pipettes, in particular to a pipette for molecular biology experiments, which comprises a pipette body, a liquid taking mechanism is arranged at the upper end of the pipette body, the liquid taking mechanism comprises a U-shaped cavity, a first moving block is arranged inside one end of the U-shaped cavity, and a second moving block is arranged inside the other end of the U-shaped cavity. And a first sealing ring is fixedly connected to the circumferential surface of the first moving block and is in sliding connection with the inner wall of the U-shaped cavity. Through the arrangement of the liquid taking mechanism, the whole liquid taking operation process only needs to pull a pressure increasing block and rotate a rotating rod, so that the liquid taking operation steps are greatly simplified, meanwhile, a second sealing ring can slowly and stably move under the mutual cooperation of a threaded rod and a threaded block, the liquid level can stably rise, and the liquid taking efficiency is improved. Therefore, the user can stably operate and control, and the operation difficulty of the user is greatly reduced.

The utility model relates to the technical field of wiring terminals, in particular to a clamping type wiring terminal structure which comprises a base and a pressing block, two limiting blocks are fixedly installed above the base and located in the middle positions of the two ends of the base, the pressing block is installed between the two limiting blocks in a sliding mode, and the pressing block is located between the two limiting blocks and located in the middle positions of the two ends of the base. The threading hole of the pressing block and the groove of the limiting block adopt a spatial staggered layout design, and natural cross guidance is formed through a hole-groove dislocation structure, so that self-locking cross wiring of the cable is realized; and the arc-shaped groove is naturally attached to the outer contour of the cable to form a guide-in channel in smooth transition, and the cable can automatically slide into a preset position without accurate alignment when penetrating, so that the threading difficulty caused by friction clamping stagnation is remarkably reduced.

The present invention relates to the field of hydraulic technology, and in particular to a hydraulic stepless positioner to solve the technical problems that the existing hydraulic structure cannot automatically unlock, cannot automatically open, and the self-locking force and movement resistance are not ideal. The hydraulic stepless positioner includes a piston substructure floatingly arranged in an oil chamber; the piston substructure is connected to the end of the piston rod, including a valve seat piston, a left spring arranged on the left side of the valve seat piston, and a right spring arranged on the right side of the valve seat piston; the left spring and the right spring are in a compressed state in a natural state. The hydraulic stepless positioner provided by the present invention effectively adjusts the self-locking force Fsr and the movement resistance Fmr.

The utility model discloses an automobile display screen self-locking turnover device which comprises a motor body, a reduction gear box and a self-locking mechanism, the reduction gear box comprises a sun gear, an inner gear ring, planet carrier assemblies, an upper end cover assembly and a lower end cover, and the planet carrier assemblies are connected in series and installed in the inner gear ring to achieve multi-stage large-transmission-ratio speed reduction. The self-locking mechanism comprises an output disc, a brake ring, a roller, a brake disc and an output shaft, disc protrusions are arranged on the outer side face of the output disc, disc protrusion grooves and roller grooves which are used for being matched with the disc protrusions and the roller are formed in the brake disc, the output disc and the brake disc are concentrically installed, the disc protrusions of the output disc are correspondingly clamped into the disc protrusion grooves of the brake disc, and the roller protrusions of the output disc are clamped into the roller grooves of the brake disc. The pin rollers are arranged in the pin roller grooves and located on the two sides of the disc protrusions, brake rings are installed on the peripheries of the brake disc and the output disc, and brake teeth are evenly distributed on the outer sides of the brake rings and used for being clamped into the tooth grooves of the inner gear ring. The device is compact in structure, high in efficiency, low in cost and capable of achieving speed reduction and providing larger self-locking force.

The invention relates to an automatic trimming and grinding device for curing capsules, and belongs to the technical field of plastic material trimming, the automatic trimming and grinding device comprises a workbench and a lifting assembly, a bottom inner supporting assembly is rotatably arranged on the workbench, the bottom supporting assembly is rotatably connected with a middle inner supporting assembly, and the middle inner supporting assembly is fixed to the workbench through a fixing assembly; the lifting assembly is provided with a first motor, the first motor is connected with a rotating plate, the rotating plate is fixedly provided with a top inner supporting assembly, the rotating plate is provided with an inflation pipe, the bottom inner supporting assembly is further provided with a linkage assembly, the workbench is provided with an air cylinder, the air cylinder is connected with a cutter, and the cutter corresponds to the middle inner supporting assembly; a collecting box is arranged in the workbench, the lifting assembly is connected with an upper protective cover, the workbench is provided with a lower protective cover, the upper protective cover and the lower protective cover form a cutter inlet when closed, and liquid discharging pipes are arranged at the positions, close to the cutter inlet, of the upper protective cover and the lower protective cover. The device has the effects of improving the grinding quality of the vulcanizing capsule and recycling grinding powder.

The utility model provides a kind of high-strength self-locking drill chuck, including rotating sleeve, drill body, nut, clamping jaw, gasket, a circle of ball, self-locking structure, the outside of gasket has the arc-shaped bending flanging of forward, and the tooth of self-locking structure is set in the outside of arc-shaped bending flanging, the arc-shaped bending flanging can be extruded by the circle of ball to outside when drill chuck works.The utility model can use gasket as the base body of gear ring setting, and adopt external tooth structure, improve structural strength, and, compared with end external tooth, the tooth surface is large using the structure of the utility model, in work, gear ring is also extruded by bearing steel ball and has the tendency to outward, and the engagement force with spring piece lock end is stronger, and, in work, the extrusion force of bearing steel ball received by ring-like component is the inward direction opposite to the force acting on gear ring, can further improve the engagement effect of spring piece and gear ring in work, improve self-locking performance.

The utility model relates to the technical field of oil cylinder, especially relates to a hydraulic jack, including cylinder body, piston rod, locking mechanism and anti -rotation mechanism, the piston rod coaxial is established in the cylinder body, the locking mechanism includes locking block and motor, the locking block is set on the piston rod and is connected with its screw thread, the locking block outside processing step is connected with the motor inboard, the anti -rotation mechanism includes the shaft sleeve and the key, the shaft sleeve is set on the piston rod, its outside is connected with the cylinder body, the shaft sleeve inboard is set up and the key fixed connection of key groove, the piston rod outside has been set up recess groove is used to accommodate the key and with its sliding fit. Through structural improvement makes locking mechanism and piston rod mutual cooperation, and reasonable utilization jack internal space places anti -rotation mechanism in the cylinder body and reaches the effect of piston rod circumferential location to simple integrated stable while of hydraulic jack overall structure, saves the labor high -efficient locking reliable and can remote control.

The utility model discloses a kind of bagged material folding belt conveyors, including fixed frame, folding frame being hingedly arranged in one end of fixed frame and support frame being fixed below fixed frame, motor mounting bracket is movably hingedly connected at the bottom of folding frame, gear box and screw motor are respectively mounted at the both sides of motor mounting bracket, screw motor is drivenly connected with two trapezoidal screws by gear box;The inside of support leg of support frame is fixed with fixed seat, the fixed seat is rotatably connected with turnover frame, and screw nut is installed on the turnover frame.The folding frame of the utility model realizes folding, unfolding and supporting effect by screw motor and two trapezoidal screws, the included angle between trapezoidal screw thread direction and supporting stress direction is larger, self-locking effect is good and obviously higher than push rod, folding frame is supported by two trapezoidal screws symmetrical in front and back, so that it is supported stably and stress is evenly, still has excellent reliability and stability under the state of bearing transport.

The utility model relates to the technical field of fasteners, and provides a locknut using a gasket for limiting. The nut is in threaded connection with the bolt; the bolt is sleeved with the gasket body, the gasket body is located on one side of the nut and provided with a first clamping part, the elastic strip is arranged on one side of the gasket body, the nut and / or the elastic strip are / is provided with a second clamping part, and the first clamping part is connected with the second clamping part in a clamped mode. By means of the technical scheme, the problems that in the prior art, under long-term vibration or complex working conditions, an existing locknut can still be loosened, actual requirements cannot be completely met, nut loosening cannot be completely and effectively prevented, and serious safety accidents can be possibly caused are solved.

The utility model belongs to the technical field of rotating motors, and discloses a motor with a self-locking function, which comprises a casing, a rotating shaft, a self-locking device and a self-locking device, and is characterized in that the casing is internally provided with a polygonal cavity which is provided with at least two groups of corner parts which are oppositely arranged; the stator magnets are arranged in the polygonal cavity in pairs, the stator magnets are installed at the corner parts in a one-to-one correspondence mode, the sides, facing the center, of the stator magnets are provided with arc-shaped faces, the arc-shaped faces are provided with grooves penetrating through the stator magnets in the height direction, and the stator magnets are divided into a plurality of stator magnetic poles through the grooves; the grooves in each stator magnet are formed in the same position; the plurality of arc-shaped surfaces are encircled to form a mounting area, the rotor is rotatably arranged in the mounting area, and the motor shaft is fixed in the center of the rotor and penetrates out of the shell. The motor with the self-locking function provided by the utility model is high in self-locking stability, low in abrasion and adaptive to a compact structure.

This invention proposes a CCS structure, including an aluminum bar and a nickel sheet. The aluminum bar has a trapezoidal groove. One end of the nickel sheet has a U-shaped spring portion, which is inserted into the trapezoidal groove to form a tenon-and-mortise connection. The U-shaped spring portion has a spring tongue, which elastically abuts against the groove wall of the trapezoidal groove in the inserted state to provide elastic self-locking force. This invention enhances the self-locking ability of the nickel sheet before welding through the tenon-and-mortise structure and the spring tongue structure, improves the stability and welding reliability of the nickel sheet after assembly, and solves the problem of poor fixing stability of existing straight hole grooves for U-shaped snap-fit ​​terminals.

The utility model relates to the technical field of fasteners, in particular to an anti-skidding self-locking nut for a nuclear power sluice gate, which comprises a nut and a flange plate, the flange plate is connected below the nut, the nut comprises a locking cavity, a contraction ring, a limiting column, a locking ring and a contraction opening, the locking cavity is arranged on the upper side of the nut, and the limiting column is arranged on the locking cavity. A contraction ring is arranged in the locking cavity, a limiting column is arranged in one end of the contraction ring, a locking ring is connected into the contraction ring, and a plurality of contraction openings are formed in the inner side of the locking ring. According to the anti-skid self-locking nut for the nuclear power sluice gate, the contraction ring and the locking ring are contracted to fasten the screw rod, the self-locking capacity of the nut is improved, and the strength of the connecting position is improved; the anti-skid teeth are arranged below the flange plate of the nut, higher friction force can be provided for the connecting position, it is guaranteed that the nut is kept stable and safe in the using process, and accidents are avoided.

The invention relates to the technical field of bridge structures or buildings, in particular to a fabricated seismic mitigation and isolation support with a novel anchoring structure and a mounting method.The fabricated seismic mitigation and isolation support is characterized in that a lower seat plate, a middle seat plate and an upper seat plate are sequentially arranged from bottom to top, and the lower seat plate is of a fabricated structure and comprises a lower seat plate base plate, a lower seat plate inserting plate and an anchoring part; the lower seat plate base plate and the lower seat plate inserting plate are connected into a whole, the anchoring part penetrates through the lower seat plate base plate to be connected with the abutment cushion stone, and the anchoring part completely enters the lower seat plate base plate to be used for reducing the assembling difficulty when the assembly type shock absorption and isolation support is installed. The anchoring part is improved, so that the height of the anchoring part can be reduced while the connecting length is guaranteed, and installation is convenient; meanwhile, the anchoring part is optimally designed, the self-locking effect of the anchoring part is improved, and the reliability of the device is improved.

The invention relates to the technical field of reinforcing steel bar machining, in particular to a rolling device for producing three-face ribbed reinforcing steel bars, which comprises a base and three rolling units, each rolling unit comprises a motor driving assembly, a bearing seat, a bearing, a transmission shaft and a roller, the bearing is mounted in the bearing seat, the transmission shaft coaxially penetrates through the bearing and the roller and is fixed with the roller, and the motor driving assembly drives the transmission shaft to rotate. The motor driving assembly drives the rollers to rotate through the transmission shaft to roll ribs on the surfaces of the steel bars. The included angle between the axes of any two adjacent rollers is 120 degrees, and a rolling channel is formed among the three rollers. According to the rolling device, the motor driving assembly is adopted to drive the roller to conduct active transmission, a bearing in a traditional process technology is moved out of the inner center of the roller, a bearing and a transmission shaft with larger sizes can be configured, larger rolling force can be borne, the geometric size of a steel bar rolled by the rolling device is more accurate, the shape of a rolled crescent rib is fuller, and the service life of the steel bar is prolonged. The concrete anchoring performance is good, the concrete bearing capacity is large, and the building quality is effectively guaranteed.

The utility model discloses a straw rope nail which comprises a screw body, a screw head and a straw line section, and threads are arranged on the screw body. A tail cutting groove is formed in the tip of the screw body, a rotating part is arranged on the upper end face of the screw head, a first optical axis section is arranged between the grass line section and the end, away from the tip, of the screw body, and a second optical axis section is arranged between the end, away from the first optical axis section, of the grass line section and the screw head. A plurality of protrusions are evenly distributed on the peripheral face of the side, close to the second optical axis section, of the screw head. Compared with a straw rope nail in the prior art, the straw rope nail has the advantages that the inclined surfaces can be inserted into a wood quilt in an occlusion manner, so that the self-locking force of the straw rope nail can be more effectively improved, and the problem of loosening caused by reverse rotation of the straw rope nail is solved.

The utility model discloses a self-locking mechanism and a lifting table motor. The self-locking mechanism comprises a limiting part; and the friction ring is connected to the driving shaft in a sleeving mode, the friction ring is connected to the limiting part, the friction ring is of a spiral bent structure, and after the limiting part is fixed, the friction ring conducts clasping self-locking or loosening on the driving shaft through forward rotation or reverse rotation of the driving shaft. In the braking process, the friction ring is driven by the driving shaft to deform, the inner diameter is reduced, the driving shaft is tightly held by the inner side face of the friction ring, self-locking is achieved, noise in the using process can be lowered, mounting and dismounting are convenient, and using is stable and reliable.

The application provides a crane and a safety index evaluation method thereof, and the method comprises the following steps: collecting safety factor data of the crane in real time, including an instantaneous change rate sequence of worm gear rotating speed, a main wind direction angle and an instantaneous wind speed, and an actual weight and a material type of hoisted materials; calculating an operation stability index based on the instantaneous change rate sequence of the worm gear rotating speed to obtain a mechanical risk factor; judging a lateral wind load state of the crane through the main wind direction angle and the instantaneous wind speed to obtain an environmental risk factor; dynamically adjusting a trigger threshold of a locking and limiting structure based on the judgment of the mechanical risk factor and the environmental risk factor, and dynamically correcting a load risk factor; comparing the corrected load risk factor with a preset safety threshold, and when the corrected load risk factor exceeds the preset safety threshold, dynamically adjusting a crane parameter according to at least one of the mechanical risk, the environmental risk and the load risk, so that intelligent management of the use safety of the crane is realized.

The utility model discloses a bearing seat with multiple installation modes, which comprises a base, the left side surface and the right side surface of the base are fixedly connected with symmetrical connecting plates, the upper surface of each connecting plate is provided with a threaded hole, the inside of each threaded hole is in threaded connection with a bolt, the bottom surface of the base is provided with symmetrical grooves, and the grooves are in threaded connection with the bolts. The inner wall of each groove is fixedly connected with a U-shaped frame, the bottom end of each U-shaped frame is fixedly connected with a threaded rod, and the outer surface of each threaded rod is in threaded connection with a fixing nut. According to the device, a first fixing mechanism of the device is composed of a connecting plate, a threaded hole and a bolt, the base of the device can be conveniently fixed, the firmness of the device is improved, a second fixing mechanism of the device is composed of a groove, a U-shaped frame, a threaded rod and a fixing nut, the device can conveniently fix a circular fixing body, and the device is convenient to use. Therefore, the stability of the device in the using process is guaranteed.