43results about How to "Act as limit protection" patented technology

The invention discloses an active and passive integrated four-feet converged type vibration isolator which comprises an upper connection plate (1), inclined micro-vibration control units (2), a thirdslotted disk spring (4), a lower connection plate (5) and a slotted cylindrical spring (6); one end of the slotted cylindrical spring (6) is connected with the third slotted disk spring (4); the otherend of the slotted cylindrical spring (6) is fixed to the middle part of the lower connection plate (5); the third slotted disk spring (4) is fixed to the middle part of the upper connection plate (1); the inclined micro-vibration control units (2) are uniformly distributed around a center shaft of the slotted cylindrical spring (6) in the circumferential direction of the upper connection plate (1), and are obliquely mounted; one ends of the inclined micro-vibration control units (2) are connected with the upper connection plate (1); and the other ends of the inclined micro-vibration controlunits (2) are connected with the lower connection plate (5). With the adoption of an active and passive integrated structure, wide frequency band micro-vibration control can be realized, the vibrationisolation efficiency of the vibration isolator and the adaptability of the vibration isolator to a complex environment and a changing object are improved.

A one-dimensional fiber bragg grating vibration sensor with temperature and prestress compensation is characterized in that a track penetrates through the bottom in a sensor shell, a left prestress adjusting table and a right prestress adjusting table are arranged on the tracks on the two sides outside the sensor shell, a mass block is connected to the track in the middle in the sensor shell through a sliding block, and an optical fiber is adhered to the mass block; a first grating and a second grating are inscribed on the optical fiber, tail fibers at the two ends of the optical fiber penetrate through the sensor shell to be fixedly arranged on a left prestress adjusting table and a right prestress adjusting table respectively, a left spring plunger sequentially penetrates through the left prestress adjusting table and the sensor shell, and a positioning ball at the end of the left spring plunger abuts against the left side wall of the mass block. Left spring plungers on the two sides of the left prestress adjusting table are in threaded connection with a left outer adjusting nut and a left inner adjusting nut, a right spring plunger sequentially penetrates through the right prestress adjusting table and the sensor shell, and a positioning ball at the end of the right spring plunger abuts against the right side wall of the mass block. A right outer adjusting nut and a right inner adjusting nut are in threaded connection with right spring plungers on the two sides of the right prestress adjusting table.

The invention discloses an intelligent snow removal roof structure and relates to the technical field of intelligent buildings. The intelligent snow removal roof structure comprises a main body, wherein the main body is a right-angled trapezoid in cross-section and the inside of the main body is hollow, the upper slope of the main body is sloped from top to bottom from back to front, the top wallof the main body is provided with rotating holes that are round through holes, the number of the rotating holes is set according to the size of the main body, a rotating rod is provided inside the rotating holes, the rotating rod is a round rod with a smooth surface, the rotating rod extends from the inside of the rotating hole to the top of the main body, a set of fan blades are sleeved on the outer cylinder of the rotating rod, and each set of fan blades are left-and-right symmetrical triangular fan blades. In the invention, by providing a snow removal block, the triangles on the front and back sides of the snow removal block can break the ice that has solidified with water when the triangular blocks on the front and back sides of the snow removal block are in contact with snow piles inside a snow trough during the back and forth movement of the snow removal block inside the snow trough, thereby avoiding the situation that the snow is hard to remove when being solidified with water.

The invention provides a labor-saving conveying device for conveying materials. The labor-saving conveying device comprises conveying frames, lifting frames, a synchronous shaft, hydraulic cylinders,driving pieces and universal wheels, wherein the conveying frames are fixedly connected at the middle positions of the inner sides of two mounting frames through welding brackets; a cylinder body of each hydraulic cylinder is fixedly connected to the two ends of the inner side surface of the corresponding mounting frame, and the output end of each hydraulic cylinder is fixedly connected to the outer side surface of a lifting conveying frame; the inner side surface of each lifting frame is slidably connected with a top plate; the outer sides of the lifting frames are connected to the conveyingframes through the meshing of gears and racks; and the synchronous shaft is rotatably connected to the upper surfaces of the lifting frames through bearings and connected with the lifting frames. According to the labor-saving conveying device for conveying the materials, when the conveying frames are used, the lifting and conveying of a goods tray are realized, and goods are lifted from the bottomof the tray, so that the height of the conveying equipment and the lifting height of the tray are reduced as much as possible, the goods on the tray are conveniently conveyed below a workbench and anoperation table in a workshop, the operation is convenient, and the occupied area is small.

The invention discloses a novel corrugated steel web external prestress box girder bridge steering device which comprises a cushion frame structure and a buckle frame structure vertically arranged atthe top of the cushion frame structure, the cushion frame structure and the buckle frame structure are the same in shape, and the cushion frame structure comprises a plurality of cushion plates with the same ruler diameter. A steering engine is arranged in the center of the base plate, the top output end of the steering engine is connected with the bottom end of a buckle frame structure, a load-bearing frame is arranged at the top of the buckle frame structure, the load-bearing frame is a square body, an opening is formed in the top of the load-bearing frame, and a plurality of limiting structures are further arranged on the outer side of the steering engine. And a column pipe corresponding to the limiting structure is arranged at the bottom of the base plate. The shapes of the cushion frame structure and the buckling frame structure correspond to each other, and the corresponding limiting structures and the corresponding column tubes are added to the cushion frame structure and the buckling frame structure, so that the cushion frame structure and the buckling frame structure can be adjusted to stretch out and draw back and buckled with the column tubes through the limiting structures, the supporting balance is enhanced, and the limiting protection effect is achieved.

The invention discloses an active and passive integrated four-feet converged type vibration isolator which comprises an upper connection plate (1), inclined micro-vibration control units (2), a thirdslotted disk spring (4), a lower connection plate (5) and a slotted cylindrical spring (6); one end of the slotted cylindrical spring (6) is connected with the third slotted disk spring (4); the otherend of the slotted cylindrical spring (6) is fixed to the middle part of the lower connection plate (5); the third slotted disk spring (4) is fixed to the middle part of the upper connection plate (1); the inclined micro-vibration control units (2) are uniformly distributed around a center shaft of the slotted cylindrical spring (6) in the circumferential direction of the upper connection plate (1), and are obliquely mounted; one ends of the inclined micro-vibration control units (2) are connected with the upper connection plate (1); and the other ends of the inclined micro-vibration controlunits (2) are connected with the lower connection plate (5). With the adoption of an active and passive integrated structure, wide frequency band micro-vibration control can be realized, the vibrationisolation efficiency of the vibration isolator and the adaptability of the vibration isolator to a complex environment and a changing object are improved.

The invention relates to the technical field of glass tempering auxiliary equipment, and in particular relates to an air grid lifting device. The air grid lifting device comprises a base, a guide column, a motor and a lifting base, wherein the motor is connected to a driving shaft, and the driving shaft is connected to a driven shaft. The air grid lifting device is characterized in that crank connecting link lifting mechanisms are arranged at two ends of the driving shaft and the driven shaft; the crank connecting link lifting mechanisms are hinged to the lifting seat for driving the lifting seat to lift along the guide column; the front ends of the driving and driven shafts are connected to a first parallel double crank connecting link lifting mechanism and the back ends of the driving and driven shafts are connected to a second parallel double crank connecting link lifting mechanism; the first and second parallel double crank connecting link lifting mechanisms are symmetrically distributed and are driven by the motor to move synchronously so as to drive the driving and driven shafts to rotate synchronously. The air grid lifting device has the advantages that the air grid liftingdevice is simple in structure, stable to operate and small in noise, and meanwhile, the invention also provides a tempered air grid system adopting the air grid lifting device.

The invention relates to the field of continuous casting machines in the metallurgical industry, in particular to a vibration buffer limit device, which includes a buffer connection frame and a buffer connection seat, an upper roller assembly is arranged on the lower part of the buffer connection frame, a roller mounting frame is arranged on the upper part of the buffer connection seat, and the roller is installed The lower roller assembly is arranged on the frame, the two sides between the buffer connection frame and the buffer connection seat are respectively provided with vertical limit plates, the upper part of the limit plate is provided with a vertical first limit hole, and the upper roller assembly has an upper roller and an upper roller. The roller shaft, the lower roller assembly has a lower roller, and a buffer is arranged between the upper roller and the lower roller. The present invention, through the first limit hole opened on the limit plate, can limit the stroke of the upper roller shaft when the buffer is forced to reciprocate, thereby limiting the position of the reciprocating motion of the buffer, and can give the vibration device It plays the role of limit protection, so as to avoid accidents such as downtime caused by the over-travel operation of the buffer.

The present invention provides a control system and method for a liquid crystal panel hoist, the system comprising: a PLC controller connected to a barcode reader for outputting control according to the position information of the barcode tape read by the barcode reader signal; the drive motor is used to drive the lifting of the car of the hoist; the frequency converter is connected to the PLC controller and the drive motor respectively, and is used to control the drive motor according to the control signal of the PLC controller; the servo motor is used to drive Lifting and lowering of the transport line in the car; the servo driver is connected to the PLC controller and the servo motor respectively, and is used to drive the servo motor to rotate according to the control signal of the PLC controller. The present invention realizes the lifting and lowering of the transportation line in the car through the servo motor, which solves the problem that the deformation of the steel wire rope causes the deviation of the height of the transportation line in the car and the external transportation line, and makes the position control accuracy of the transportation line in the car Control within 0.5mm.

The invention discloses a car-following rod-colliding preventing device, and relates to the technical field of traffic facilities. The car-following rod-colliding preventing device comprises a barriergate case body and a barrier gate rod, and further comprises a photoelectric sensor installed on the ground. A first-stage stroke switch is installed on the barrier gate case body and corresponds tothe barrier gate rod. A through groove is formed in the lower portion of the barrier gate rod in the length direction. A barrier assembly is arranged in the through groove, and comprises a bearing plate arranged in the through hole, a first-stage releasing device arranged at the inner right end of the through groove, a second-stage releasing device arranged at the left end of the top face of the bearing plate, and a barrier body device arranged on the lower side of the bearing plate. The left side of the bearing plate is rotationally connected with the front side wall and the rear side wall ofthe through groove through rotating shafts. A load bearing block is fixed to the right side of the bearing plate. A pressure spring is arranged at the right portion of the upper side wall of the through groove in the vertical direction. The car-following rod-colliding preventing device has the advantages that the problem that a car behind closely follows a car in front and rushes through a barrier gate rod when passing through a barrier gate can be avoided, and operation is simple.

The invention discloses a crawling training device for infants and relates to a training device for infants. The device comprises a crawling channel, a supporting base, a channel gradient adjustment mechanism, a channel plane rotation mechanism, anti-rollover mechanisms and a music learning control system. The crawling channel is a cross crawling channel, obstacle cloth bags are arranged in the channel, and a direction training operation button is arranged at the inner side of an end point of one end of the channel; the supporting base comprises a supporting plate, anti- turnover clump weights, a lower supporting column and the like; the channel gradient adjustment mechanism comprises front and rear supporting blocks, left and right adjustment rotary buttons, left and right limit blocks and the like; the channel plane rotation mechanism comprises a plane bearing, and the four anti-rollover mechanisms are symmetrically connected to the bottom of the crawling channel separately. According to the crawling training device for the infants, the gradient of the crawling channel can be adjusted according to the channel gradient adjustment mechanism, the crawling difficulty of the infants is increased, and the training effect is improved; the device can also assist the infants in developing the direction consciousness, has the advantages of being capable of rotating flexibly and freely,good in safety performance, convenient to use, high in interestingness and the like, and is easy to apply and popularize.

The invention discloses an active and passive integrated all-metal micro-vibration control device which comprises a supporting rod, diaphragm springs and the like. The supporting rod penetrates in a first shell inner cylinder, and a coil support is fixedly installed at the other end of the supporting rod through a supporting plate. A voice coil motor rotor is installed on the coil support and moves transversely between an inner ring permanent magnet and an outer ring permanent magnet of a voice coil motor stator in the axial direction. One end of a metal spring is fixedly installed at the connecting opening position of a second shell and a first shell through an end cover, and the other end of the metal spring is matched with the end portion of a limiting sleeve. The limiting sleeve is supported in the second shell through a metal rubber gasket. The metal spring is connected with external equipment through an inner thread at the end portion and presses the limiting sleeve. The diaphragm springs are installed between the supporting rod and an end cover of the first shell, between the coil support and the inner wall of the end cover of the first shell and between the supporting plate of the coil support and the end cover of the metal spring. According to the active and passive integrated all-metal micro-vibration control device, wide-frequency-band micro-vibration control can be achieved, the vibration isolation effect of a vibration isolator is improved, and adaptability to various complex environments is improved.

The invention discloses a driving wheel of an electric forklift truck. The driving wheel comprises a driving bracket, a driving motor mounted on the driving bracket, a transmission component and a rubber wrapping wheel component connected to the outer ring of the driving motor in a rotary manner, wherein the driving bracket comprises a mounting part and a connecting part, the connecting part comprises a transverse plate and a hollow connecting column, and a threading through hole communicated with the inner cavity of the connecting column is formed in the side wall of the transverse plate; thedriving motor is fixed to one side of the mounting part, a power control line sequentially penetrates through the threading through hole and the inner cavity of the connecting column to be connectedwith the control system of the electric forklift truck, the transmission component comprises a driving gear, a transmission shaft, a first driven gear and a second driven gear fixedly sleeved on the transmission shaft, the driving gear is fixed to an output shaft of the driving motor, the transmission shaft is mounted on the mounting part through bearing support in a rotary manner, the driving gear meshes with the first driven gear, the rubber wrapping wheel component comprises a sleeve and a rubber wrapping wheel, the sleeve is mounted on the outer ring of the driving motor in a rotary and sleeved manner, and an inner gear ring meshing with the second driven gear is arranged on the inner wall of the sleeve.