40results about How to "Increase turning radius" patented technology

The invention relates to the textile technical field, in particular to a variable-diameter anti-slip textile conveying roller. The conveying roller comprises a rotating shaft, an electromagnet is fixedly connected to the middle of the rotating shaft, uniformly distributed springs I are fixedly connected to the outer side of the rotating shaft, clamping blocks movably connected with the inner wallof the rotating shaft are fixedly connected to the outer sides of the springs I, magnetic blocks I are fixedly connected to the middles of the clamping blocks, the outer side of the rotating shaft ismovably connected with a conveying roller body, and clamping grooves are evenly distributed in the inner wall of the conveying roller body. According to the variable-diameter anti-slip textile conveying roller, through cooperative use of a rubber ring and piston blocks, when the conveying device is used, the electromagnet is powered on, the piston blocks can move outwards under the mutual repulsion acting force of the electromagnet and magnetic blocks II, electrorheological fluid is extruded outwards, the rubber ring is expanded, and the rotating radius of the conveying roller body is effectively increased, so that attachment of the conveying roller body and cloth can be effectively guaranteed, the effect of preventing the cloth from slipping is achieved, and wrinkling of the cloth is effectively avoided.

The invention discloses a galloping test machine power loading device for a transmission tower tension change research. The galloping test machine power loading device comprises a rack, and a driving mechanism and a parallel four-bar mechanism arranged on the rack; wherein the driving mechanism is in drive connection with the parallel four-bar mechanism, and comprises a variable frequency motor; the parallel four-bar mechanism is arranged vertically, and comprises a driving rotating arm, a driven rotating arm and a connecting rod connected between the driving rotating arm and the driven rotating arm; a hollow casing pipe is longitudinally arranged in the middle of the connecting rod; and the variable frequency motor is in control connection with a frequency changer. According to the galloping test machine power loading device for the transmission tower tension change research, the operation frequency and the circular operation radius are adjusted, the conductor galloping with various dynamic characteristics and different amplitudes is simulated, a dynamic tensile force acting on a transmission tower when the ice coated conductor is galloped is reproduced, and a deep research can be carried out on a collapse theory of the transmission tower under the action of the tensile force when the ice coated conductor is galloped.

The invention discloses a 4-axis nc relief grinding machine tool for ellipsoidal and spherical hobs, which is characterized in that: a machine bed(3) is provided with an arc adjusting plate(11) whose position can be adjusted and a rotary plate(19) that can rotate around a rotary shaft(18) fixed on the arc adjusting plate(11).The rotary plate(19) is sequentially provided with a radial feeding knife frame(22), a tangential feeding knife frame(15) and a cutter from the lower part to the higher part. The rotary shaft (18) is perpendicular to the central lines of a spindle box (1) and a tailstock (2). An arc rolling guiding rail (23) is arranged between the rotary plate (19) and the arc adjusting plate (11). The lower parts of the radial feeding knife frame (22) and the tangential feeding knife frame (15) are respectively provided with a straight line rolling guiding rail (21). With the proposal adopted, the special machine tool for processing spherical and ellipsoidal internal gear hobs is provided, which solves the problems that the cutters of large diameters are difficult to be processed with difficult processing and low precision.

The invention discloses a refracturing method for digging remaining oil of a crack in the side direction in an extremely-low permeability reservoir old well. The method comprises the following steps that (1) a lateral production well in the water driving predominant direction is selected, and a potential layer section is preferably selected; (2) oriented perforating is conducted on the potential layer section and the distribution direction of remaining oil; (3) a dual-sealing fracturing string is tripped in a newly perforated layer section; (4), a layer section subjected to oriented perforating is subjected to continuous construction of acid fracturing and refracturing; (5), well shut-in and open flowing are conducted, the fracturing string is pulled out for repeated production. Accordingto the method, new turning cracks are formed in the refracturing process of an extremely-low permeability reservoir old oil field, remaining oil in the side direction of old cracks is dug, and the purposes of controlling water and increasing oil are achieved.

The invention discloses an aluminum bronze continuous casting furnace based on electromagnetic stirring and autonomous stirring, and relates to the technical field of continuous casting. The aluminumbronze continuous casting furnace based on electromagnetic stirring and autonomous stirring comprises a furnace body, an electromagnetic stirrer, an ultrasonic generator arranged at the upper part ofthe furnace body and a high-temperature graphite conduction mechanism, wherein the electromagnetic stirrer is fixedly installed at the front position where melt of the furnace body is discharged, andthe ultrasonic generator is installed at the top of the furnace body and transmits energy to the end part of a graphite sleeve at the top. According to the aluminum bronze continuous casting furnace based on electromagnetic stirring and autonomous stirring, the structure is refined and uniformed through electromagnetic stirring during solidification, so that formed impurities with relatively lightdensity can be removed at the fusion end through ultrasonic waves, and a high-quality casting blank which is low in impurity content, low in oxygen content and uniform in structure can be produced.

The invention discloses a symmetrical 4-degree of freedom series-parallel hybrid antenna structure system, which comprises an antenna reflector. The antenna reflector is connected on an antenna pedestal; a polarization rotation device comprises a polarization plate and a fixing plate; the fixing plate is fixed at the top of the antenna pedestal; the polarization plate is located above the fixing plate; a rotating bearing is concentrically arranged between the fixing plate and the polarization plate; the polarization plate is fixedly connected with the inner ring of the rotating bearing; the fixing plate is fixedly connected with the outer ring of the rotating bearing; the center of the polarization plate extends outwards to form a toothed ring edge; a polarization motor fixed on the fixingplate is matched with the toothed ring edge to drive the polarization plate to rotate in an auto mode; a driving arm and a driven arm are provided with rotating rod shafts; the rotating rod shafts are hinged; the hinged rotating rod shafts generate the ability to rotate in the own circumference during a movement process, and thus, the rotating rod shafts can have rotating energy during use, and the radius of rotation can be improved when rotating directions coincide.

The invention discloses a rehabilitation training device for hemiplegic patients, which comprises a frame, a seat plate, casters, a pulley assembly and a pedal assembly, wherein the frame comprises four rods: a first vertical rod, a first front cross rod, a first rear cross rod and a first side cross rod. The pedal assembly comprises a left pedal assembly, a right pedal assembly and a main connecting rod; a second vertical rod is fixed on the middle part of the first rear cross rod, and the main connecting rod is fixed below the second vertical rod. The pulley assembly comprises a first pulleyand a second pulley, wherein the first pulley is connected with the left pedal assembly through a first connecting rope, and the second pulley is connected with the right pedal assembly through a second connecting rope. The rehabilitation training device for the hemiplegia patients can help the patients to carry out normal gait training; the power of the lower limbs movement of the patient is provided by the upper limbs of the patients, and the power of the upper limbs movement is provided by the lower limbs of the patients; an external power supply is not required, the upper limbs and the lower limbs can be trained at the same time, and the rehabilitation training device for the hemiplegia patients is simple in structure and is used conveniently.

The invention discloses a can hanging device for a garbage truck. The can hanging device comprises an upper support connected with a garbage can lifting mechanism on the garbage truck, the two sides of the upper end of the upper support are each provided with an upper guide wheel, a lower support is hinged to the upper support, the two sides of the lower end of the lower support are each provided with a lower guide wheel, a garbage can buffer device is installed between the upper support and the lower support, two connection crank arms are oppositely installed on the garbage can buffer device, the two connection crank arms are each rotationally connected with an adjusting rod, and a can toppling prevention device is installed between the two adjusting rods. A garbage can alignment device is rotationally installed on the front side of the lower end of the upper support. According to the can hanging device for the garbage truck, intense collision among the components can be relieved, a garbage can is prevented from being turned over wholly, the contact area of the upper support and the garbage can is capable of being enlarged, the situation that the upper support makes linear contact with the garbage can is avoided, and a certain protective effect on the garbage can is achieved.

The invention discloses an impacting steel wheel of a road roller and belongs to the field of the road roller. By adoption of the impacting steel wheel, the problem that the eccentric blocks can applyhorizontal eccentric forces on a main shaft to influence the traveling of the road roller is solved. The key points of the technical scheme of the impacting steel wheel of the road roller are characterized in that the impacting wheel comprises a wheel body and the main shaft, wherein the wheel body and the main shaft are coaxially arranged and are rotatably connected; the main shaft is rotatablyconnected with a first eccentric block and a second eccentric block which rotate reversely at constant speed; when the first eccentric block rotates to the lowermost end, the second eccentric block also rotates to the lowermost end; the main shaft is provided with a driving device for driving the first eccentric block and the second eccentric block to rotate. The impacting steel wheel disclosed bythe invention has the advantages that the structure is reasonable, the eccentric forces of the first eccentric block and the second eccentric block can be counteracted each other, and then the steelwheel generates impact in the vertical direction instead of impact in the horizontal direction, so that the purpose of reducing the influence on traveling of the road roller is achieved.

Abstract of the DisclosureA travel trailer configured to be coupled to and towed by a vehicle is provided. The travel trailer has a compartment that is attached to a chassis which includes a front end and a rear end. A plurality of wheels are attached to the chassis adjacent the rear end, and a hitch assembly is attached to the chassis adjacent the front end. The compartment at the front end of the chassis forms first and second corners. A recess, directed inwardly toward the interior of the compartment, is located at each corner of the compartment. Cavities formed by each recess may receive a portion of the vehicle while the vehicle is engaged in a turn.

The invention discloses a final transmission structure, a bulldozer and a turning control method, and relates to the technical field of bulldozers. In the final transmission structure, a steering brake unit comprises a brake, a driving hub, a clutch and a driven hub, wherein the brake is connected with an input shaft through the driving hub, the clutch is connected with a transmission unit througha driven hub, and the brake and the clutch can be selectively unlocked or locked. A first planetary gear ring and a second planetary gear ring form a planetary gear ring of an integrated structure. The bulldozer comprises an engine, a hydraulic torque converter and a gearbox which are connected in sequence. A central transmission structure is connected with the gearbox. A left final transmissionstructure and a right final transmission structure are both connected with the central transmission structure and are both of the final transmission structure. The bulldozer is adopted in the turningcontrol method. The final transmission structure can bear larger torque when rotated leftwards or rightwards, and torque transfer is stable. The turning control method has the large or small radius turning ability, and is high in universality.

The invention relates to the technical field of electric driving, and further discloses a centrifugal self-balancing type illumination system, which comprises a lamp pole and is characterized in thatthe top end of the lamp pole is fixedly connected with a driving motor, the output shaft of the driving motor is fixedly connected with a sliding rod bracket, the outer surface of the sliding rod bracket is fixedly connected with a sliding rod, and the end, close to the sliding rod bracket, of the outer surface of the sliding rod is movably connected with a spring baffle. According to the invention, by arranging a gravity block, when the driving motor rotates, the driving motor can move outwards under the action of centrifugal force; by arranging a step shaft sleeve, a connecting rod and a centrifugal wheel, centrifugal force generated by the driving motor is converted into torsion of a centrifugal box, so that the phenomenon that the centrifugal box inclines in a rotating process is resisted; and the driving motor is started to drive a contraction plate to rotate, and when the centrifugal force generated by the rotation of the contraction plate is larger than the elastic force of a telescopic spring, the contraction plate can move outwards, so that the rotating radius is increased, and the effect of increasing the illumination area is achieved.

The scheme discloses a vehicle alarm device in the field of vehicle early warning technology, which comprises a host prompter and at least two infrared sensors. The host prompter comprises a controller and a voice prompter; the infrared sensor is connected with the controller, and the controller is connected with the voice prompter by a signal line. The infrared sensor is used to sense a human body outside the car window and sends the data to the controller; the controller is used to receive data sent by the infrared sensor and to control the voice broadcast by the voice prompter. The voice broadcast in this scheme detects whether a passenger sticks his head or hand out of the window through the infrared sensor, and then transmits the voice broadcast through a controller-controlled voice prompter. On the one hand, the disturbance to the passengers is reduced as much as possible; on the other hand, the situation in the prior art that passengers stick their heads and hands out of the window without being broadcast is avoided.

The invention provides an antenna feeder which is arranged on plane horizontal tails and is connected with a radio altimeter. The antenna feeder comprises a receiving microstrip antenna, a transmitting microstrip antenna, a receiving feeder and a transmitting feeder. The receiving microstrip antenna and the transmitting microstrip antenna are located in horizontal tails on both sides of a verticalstabilizer respectively. The receiving feeder is connected with the receiving microstrip antenna and the radio altimeter. The transmitting feeder is connected with the transmitting microstrip antennaand the radio altimeter. The receiving feeder and the transmitting feeder are crossed to come into the fuselage from the horizontal tails.

The invention discloses composite film forming equipment for environment-friendly TPU car cover film production and a using method thereof in the technical field of car cover film manufacturing. The composite film forming equipment for environment-friendly TPU car cover film production comprises a main body frame, wherein the main body frame comprises a TPU roller which is rotationally connected with the inner side wall of the main body frame, a PET roller which is arranged on the upper right portion of the TPU roller and rotationally connected with the main body frame, a displacement assembly which is slidably connected with the inner side wall of the main body frame, and a speed change assembly which is rotationally connected with the outer side wall of the main body frame, the displacement mechanism is pushed by virtue of winding thickness so that the position of a belt clamping block in the speed change mechanism can be changed, the rotating radius of the belt clamping block is increased through expansion of a tensioning wheel on a speed change belt, and the linear speed is increased accordingly; and at the moment, the rotation of the speed change belt is accelerated, then the rotating speed of a driving gear and the rotating speed of a driven gear are driven to be accelerated, the rotating speed of a rubber driving roller and the rotating speed of a steel driven roller are accelerated, and therefore the rotating speeds are effectively adjusted to prevent the car film from tensile deformation or breakage caused by the rotating speed difference when the car film is wound.

The invention discloses a computer group security robot for cloud computing and a using method thereof, and relates to the technical field of security robots. The computer group security robot comprises a shell and a camera, and further comprises two rear wheels and two friction wheels, the inner wall of the shell is fixedly connected with a mounting frame, the surface of the mounting frame is provided with a front wheel, and the inner wall of the shell is fixedly connected with a motor. The surface of a motor driving shaft is fixedly connected with a first rotating shaft, the surface of the first rotating shaft is fixedly connected with a conical friction wheel, the conical friction wheel abuts against the two friction wheels, and the upper end of the first rotating shaft is fixedly connected with the lower surface of the camera. Two linkage parts which are used to drive the two rear wheels to change their speed at any time are further included. The computer group security robot for cloud computing has the effects that the camera rotates in all directions for detection, the camera is driven to imitate irregular movement when people walk, and the problem that a traditional security robot patrols according to a fixed straight line, so that lawbreakers can obviously see the movement law of the robot and avoid the robot is solved.

The invention discloses a combined-wing aircraft belonging to the technical field of aircrafts. The aircraft includes a fuselage, a rotor, fixed wings, a power distributor, a supercharger, rudder control nozzles and a drive shaft. The rotor, the power splitter and the supercharger are arranged above the fuselage. A support wheel of the rotor is arranged on the circular orbit of the supercharger. The fixed wings are arranged on both sides of the fuselage and below the rotor. The rudder control nozzles are arranged on the fixed wing on both sides of the fuselage and at the tail of the fuselage,and the drive shaft is connected to the power distributor and a power device in the fuselage. The power distributor drives the rotor and an impeller of the supercharger to rotate reversely at non-equal speeds to generate a pulling force and a high-speed airflow required by the aircraft. The high-speed airflow is ejected from the nozzles to generate an aerodynamic force, and the rudder control nozzles change the size, distribution and direction of the aerodynamic force to realize the attitude control of the aircraft. The combined-wing aircraft of the invention has advantages of both rotor aircrafts and fixed wing aircrafts, is capable of short take-off and landing and is capable of raising the flight efficiency. A power train and a rudder control system mechanism are simple, and are compactin structure and high in reliability.

The invention provides an external moving cable rotating system. The system is used for accelerating an uplink spacecraft so as to enable the spacecraft to enter an orbit. After the uplink spacecraftis in butt joint with the tail end of a main rope of the external moving cable rotating system, a winch unwinds cables, so that the spacecraft moves outwards on one side and rotates around the centerof mass on the other hand, and mechanical work generated by the cable is converted into electric energy to be stored by the winch or converted into heat energy of a brake. According to the method, theline speed and the centrifugal acceleration of the spacecraft after butt joint can be reduced. In particular, a retarder is arranged in the winch. By means of the method, centrifugal force can be greatly reduced, and comfort is improved. The winch is provided with the retarder with the large heat absorption capacity, so that the self-rotating energy of the system after butt joint can be absorbed,and that the spacecraft is guaranteed to quickly move outwards. By utilizing the winch, the system has an uplink method, so that a high centrifugal force stage of an uplink process of the spacecraftis short, and the comfort is high.

The invention discloses a computer group security robot for cloud computing and a method for using the same, and relates to the technical field of security robots, including a casing and a camera, and also includes two rear wheels and two friction wheels. The surface of the mounting frame is equipped with a front wheel, the inner wall of the housing is fixedly connected with a motor, the surface of the motor drive shaft is fixedly connected with a rotating shaft one, and the surface of the rotating shaft one is fixedly connected with a tapered friction wheel, and the tapered friction wheel is connected with two friction wheels. The wheels are in contact with each other, and the upper end of the rotating shaft 1 is fixedly connected with the lower surface of the camera. It also includes two linkage parts 1 for respectively driving the movement speed of the two rear wheels to change constantly. The present invention has the omni-directional rotation detection of the camera and the driving It imitates the effect of irregular movement when people walk, and solves the problem that traditional security robots patrol according to a fixed line, so that criminals can clearly see the law of robot movement and avoid it.

The invention discloses an adjustable fixed frame for a dental device. The adjustable fixed frame comprises a fixed base, wherein a support column sleeves the inner central part of the fixed base; a first bearing sleeves a joint part of the support column and the fixed base; a first connecting rod sleeves the top end of the support column; limiting sleeves sleeve the support column and are positioned on the upper side and the lower side of the first connecting rod; the other end of the first connecting rod is welded with a support rod; a second connecting rod sleeves the support rod; a secondbearing sleeves a joint part of the support rod and the second connecting rod; the other end of the second connecting rod is welded with a fixed plate; the fixed frame is fixed to the fixed plate by bolts. According to the adjustable fixed frame for the dental device disclosed by the invention, the fixed frame is fixed on the second connecting rod, the second connecting rod and the first connecting rod are rotated through the support rod, and the first connecting rod is rotatably connected with the fixed base through the support column; through arrangement of the two connecting rods, the rotation radius of the fixed frame is increased, so that the position of the fixed frame is conveniently adjusted when the dental device is used, and the dental device fixed on the fixed frame is conveniently taken or fetched.

The invention relates to an internal combustion engine of a circular cylinder body with a single cylinder body and belongs to a power machine, in particular to a rotary piston-type internal combustion engine. The jointing surface between a piston and the wall of the cylinder body of the internal combustion engine has a cirque structure with the same radius; the rotating center of the piston and the center of the circular cylinder body are consistent; the piston is in driving connection with a clutch which is arranged on a rotary mainshaft; the piston is arranged between the inner concentric circular surface and the outer concentric circular surface of the circular cylinder wall; a piston arm is of a circular arc shape; the tail end of the piston arm is fixed with one end of a connecting rod; the other end of the connecting rod is connected with the clutch of the rotary mainshaft; the piston is in driving connection with a returning mechanism; the returning mechanism of the piston is aspring, that is, one end of the spring is connected with the connecting rod; and the other end of the spring is connected with a stander. The internal combustion engine has the advantages that the internal combustion engine has a simple structure, reasonable stress of the piston, no dead center of power transmission, large output torsional moment and small abrasion to a moving part.

The invention discloses a 4-axis nc relief grinding machine tool for ellipsoidal and spherical hobs, which is characterized in that: a machine bed(3) is provided with an arc adjusting plate(11) whose position can be adjusted and a rotary plate(19) that can rotate around a rotary shaft(18) fixed on the arc adjusting plate(11).The rotary plate(19) is sequentially provided with a radial feeding knife frame(22), a tangential feeding knife frame(15) and a cutter from the lower part to the higher part. The rotary shaft (18) is perpendicular to the central lines of a spindle box (1) and a tailstock (2). An arc rolling guiding rail (23) is arranged between the rotary plate (19) and the arc adjusting plate (11). The lower parts of the radial feeding knife frame (22) and the tangential feeding knife frame (15) are respectively provided with a straight line rolling guiding rail (21). With the proposal adopted, the special machine tool for processing spherical and ellipsoidal internal gear hobs is provided, which solves the problems that the cutters of large diameters are difficult to be processed with difficult processing and low precision.

The invention provides an iris device, which can enable a gear reducing mechanism to be arranged between a stepping motor and a rotary component driving iris shutters, and realize minimization of layout of a driving system comprising the stepping motor. The iris is adjusted through two iris shutters which reciprocatingly slide on opposite direction on an iris substrate, wherein the iris comprisesa rotary component driven to rotate by the stepping motor; a pair of driving pins which are arranged protrudedly on the rotary component and clamp respectively to a long hole formed on each iris shutter in a free sliding manner, so as to drive the iris shutter; a reducing gear mechanism, arranged between the rotary component and a rotary shaft of the stepping motor, composed of a motor pinion arranged on the rotary shaft of the stepping motor and an inner gear which is integrated with the rotary component and meshed with the motor pinion directly or indirectly through a middle gear.

The invention relates to the technical field of electric scooters, and provides an electric scooter easy to store, which comprises a pedal plate, a front fork, a handlebar assembly, a front wheel and a rear wheel, a connecting assembly is arranged between the pedal plate and the front fork, and the connecting assembly is used for realizing assembly and storage by changing the angle between the front fork and the pedal plate; the connecting assembly comprises a first connecting arm, a second connecting arm and a limiting structure, wherein the first connecting arm and the second connecting arm are connected, and the limiting structure is used for fixing the second connecting arm in an assembling state. The end part of the first connecting arm is detachably connected with the front fork; a mounting cavity is formed in the front end of the pedal plate; the end part of the second connecting arm is arranged in the mounting cavity and is hinged with the pedal plate through a pin shaft; in the mounting cavity, a gap is formed between the pin shaft and the front end face of the pedal plate, so that the second connecting arm serves as a part of the pedal plate and is stored in the mounting cavity in the assembled state, the backward displacement distance of the front wheel is increased in the stored state, and space is saved.

The invention discloses an unmanned aerial vehicle panoramic shooting cradle head in a limited space, the unmanned aerial vehicle panoramic shooting cradle head in the limited space comprises a fuselage assembly, a sliding device, a power device and a shooting device, the power device is connected with the fuselage assembly, the fuselage assembly is movably connected with the sliding device, and the sliding device is movably connected with the power device. The shooting device is connected with the sliding device, a sliding rail is arranged on the outer surface of the upper edge of the fuselage assembly and is of a spatial 8-shaped structure, the sliding device is slidably connected with the sliding rail, the shooting device comprises a camera, the lens end of the camera faces the outer side of the fuselage assembly, the fuselage assembly further comprises a fuselage, rotors, a housing and a base, and supporting arms are arranged on the two sides of the fuselage. One end of the supporting arms is movably connected with one side of the fuselage, the other end of the supporting arm is connected with the rotor wing, the housing is arranged on the outer side of the rotor wing, one end of the supporting arm is sleeved with the housing, and the housing is fixedly connected with the supporting arms.

The invention discloses a double-rotor butterfly UAV, which belongs to the technical field of aircraft. The UAV is composed of body, upper rotor, lower rotor, transmission system, rudder control system, positioning wheel system and so on. The upper rotor is located at the upper part of the fuselage, the lower rotor is located at the lower part of the fuselage, the driving wheel of the transmission system and the rudder blade of the rudder control system are located between the upper and lower rotors, the driving wheel is directly in contact with the discs of the upper and lower rotors, and the positioning gear train is distributed on the disc. On the circumference of the disk, the contact pressure between the upper and lower rotors and the driving wheel is maintained and rotates around the center of the body. The driving wheel of the drive train drives the upper rotor and the lower rotor to rotate at a constant speed in reverse to generate the thrust required by the UAV. The steering gear changes the initial orientation of the rudder blade, thereby changing the distribution and direction of the thrust. The size and direction of the front and rear thrust of the double-rotor butterfly UAV body can be independently and flexibly adjusted, and the maneuverability is strong, which is beneficial to flight and take-off and landing control in complex spaces.

The invention provides a dual-order-sliding large-rigidity friction damper, and relates o the technical field of construction engineering. The dual-order-sliding large-rigidity friction damper comprises an H-shaped steel beam section, angle steel, side web plates, steel cover plates and friction-type high-strength bolts; the side web plates are welded on the lower surface of an H-shaped-steel-beam-section lower flange; an H-shaped-steel-beam-section web plate, the side web plates and the H-shaped-steel-beam-section lower flange are broken at some cross section of the steel beam section, and agap with the certain distance is formed; the steel cover plates stride the gap and are attached to the two sides of the side web plates, and are connected through the friction-type high-strength bolts; corresponding to the position of the gap, the angle steel is connected with the H-shaped-steel-beam-section web plate and the inner surface of an H-shaped-steel-beam-section upper flange through welding; one side of the gap of the side web plates is a first-order sliding side, and the other side of the gap of the side web plates is a second-order sliding side; the bearing capacity of the second-order sliding side is larger than the bearing capacity of the first-order sliding side. The dual-order-sliding large-rigidity friction damper is large in sliding route and rotating rigidity and high in bearing capacity, and has the good energy dissipation and seismic mitigation performance.

The invention relates to a medical surgical instrument, in particular to a multipurpose needle searching device for operating room nursing, a rotating shaft is rotatably mounted on a fixing part in a penetrating manner, and a telescopic shaft is coaxially arranged below the rotating shaft in a sleeving manner; a needle searching assembly is installed on one side of the lower portion of the telescopic shaft in a swinging mode, the needle searching assembly is connected with the outer wall of the rotating shaft through an elastic stretching structure, and the needle searching assembly comprises a magnetic attraction structure used for generating a magnetic field to attract a suture needle and a negative pressure structure used for attracting the suture needle through negative pressure; the driving assembly drives the rotating shaft to rotate, the rotating shaft drives the telescopic shaft to rotate along with the rotating shaft, and therefore the needle searching assembly installed on the lower portion of the rotating shaft in a swinging mode is driven to rotate along with the rotating shaft, and when the needle searching assembly rotates, centrifugal force is used for overcoming elastic force of the elastic stretching structure to be gradually unfolded till the needle searching assembly is perpendicular to the rotating shaft and the telescopic shaft. After the driving assembly is closed, the needle searching assembly is automatically pulled upwards in the reverse direction under the elastic force action of the elastic stretching structure and is kept parallel to the rotating shaft and the telescopic shaft, and needle searching in the body is facilitated.

The invention discloses a field two-way interphone with a positioning function, which relates to the technical field of interphones and comprises a bottom plate, an interphone waterproof protection unit, an interphone body fastening unit and a fixing unit. The bottom plate is rectangular; the interphone waterproof protection unit comprises a protection box, an interphone body, a positioning module, a rectangular sealing cover, a rotating shaft, a supporting lug, a movable block, a first fixing block, a screw rod, a second fixing block and a threaded hole, the side face of the bottom plate is fixedly connected with the side face of the protection box, and the inner bottom face of the protection box is in friction connection with the lower surface of the interphone body. And the middle part of the side surface of the interphone body is fixedly connected with the side surface of the positioning module. When severe weather such as rainy days is encountered in the field, the interphone can be subjected to waterproof protection, so that the interphone cannot be in direct contact with water, the situation that the interphone cannot be conveniently contacted with other people due to the fact that the interphone is damaged by water is avoided, the interphone can be conveniently fixed on clothes, and great convenience is brought to use.