Through the description of the examples below, the specific implementation of the present invention such as the shape and structure of the various components involved, the mutual position and connection relationship between the various parts, the function and working principle of each part, the manufacturing process and the operation and use method Etc., to give a further detailed description to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.
 A conveying device includes a conveying track 1. A placing platform 2 is movably installed in the conveying track 1. The placing platform 2 can move up and down along the conveying track 1. The placing platform 2 is connected with a conveying motor that drives the placing platform 2 to move, and the placing platform 2 is below A safety device 3 is also installed, and the safety device 3 is electrically connected to the conveying motor.
 Specifically, the safety device 3 includes a protective cover 31, a power-off mechanism 32, a gravity feedback mechanism 33, a gravity detection mechanism 34, a magnetic field response mechanism 35, a power pushing mechanism 36, a mechanical transmission mechanism 37, and a reset button mechanism 38. The button mechanism 38 is installed at one end of the protective cover 31 in an embedded manner, the power-off mechanism 32 is electrically connected to the conveying motor, the end of the gravity feedback mechanism 33 is electrically connected to one end of the gravity detection mechanism 34, and the gravity detection The end of the mechanism 34 is connected to the left and right ends of the magnetic field reaction mechanism 35, the other end of the magnetic field reaction mechanism 35 is electrically connected to the power pushing mechanism 36, and the head end of the mechanical transmission mechanism 37 is opposite to the end of the power-off mechanism 32. Buckle
 The gravity feedback mechanism 33 includes a weight plate 331. The weight plate 331 is connected to the outer top of the protective cover 31 through a weight spring 332. A limit groove 333 is provided around the weight plate 331, and a hydraulic pressure is also provided under the weight plate 331. In the cylinder 334, the hydraulic plate 335 connected under the weight plate 331 is embedded in one end of the hydraulic cylinder 334, the other end of the hydraulic cylinder 334 is provided with a detection plate 336, and the detection plate 336 is connected to the gravity detection mechanism 34.
 Specifically, the power-off mechanism 32 includes a fixed contact, a movable contact 321, a push frame 322, a support frame 323, a sawtooth plate 324, a saw gear 325, and a fixed contact 326. The head end of the movable contact 321 is connected to the fixed contact. Point 326 is movably connected. The movable contact 321 and the fixed contact 326 constitute a conveying switch. The conveying switch and the conveying motor are connected in series in the power circuit. The end of the movable contact 321 is connected to one end of the push frame 322, and the push frame 322 penetrates Connected to the left and right sides of the support frame 323, the push frame 322 is nested in the support frame 323 and is connected to one end of the serrated plate 324, and on the same plane, the end of the serrated plate 324 meshes with the saw gear 325, The front surface of the saw gear 325 is engaged with the head end of the mechanical transmission mechanism 37.
 Specifically, the voltage detection mechanism 34 includes a metal rod 341, a sliding piece 342, a coil barrel 343, an upper terminal 344, a conductive wire 345, a lower terminal 346, and a metal bracket 347. The metal rod 341 is connected to the sliding piece 342 through At the left and right ends, the head end of the sliding piece 342 is fixedly connected with the detection board, the end of the sliding piece 342 is connected with the outer surface of the coil barrel 343, and the left and right ends of the metal rod 341 are provided with two upper terminals 344, The head end of the conductive wire 345 is electrically connected to one end of the lower terminal 346, the coil barrel 343 is inlaid with the metal bracket 347, and the other end of the conductive wire 345 is electrically connected to the magnetic field response mechanism 35.
 Specifically, the magnetic field reaction mechanism 35 includes a coil 351, a permanent magnet 352, a copper ring 353, and an electrode rod 354. The electrode rod 354 is inlaid with the coil 351. The left and right ends of the electrode rod 354 are provided with copper rings 353. The electrode rod 354 and the permanent magnet 352 are nested and connected, and the head end of the copper ring 353 is electrically connected to the other end of the conductive wire 345.
 Specifically, the power pushing mechanism 36 includes a sensor 361, a metal rod 362, a power cord 363, and a U-shaped electromagnetic block 364. One end of the sensor 361 is electrically connected to the head end of the power cord 363, and the head end of the metal rod 362 is The end of the U-shaped electromagnetic block 364 is connected, and the head end of the sensor 361 is connected with the end of the U-shaped electromagnetic block 364 through a metal rod 362.
 Specifically, the mechanical transmission mechanism 37 includes a movable frame 371, a magnetic ball 372, a return spring 373, a sliding groove plate 374, a driving wheel 375, a transmission belt 376, a driven wheel 377, and a transmission lever 378. One end of the movable frame 371 is connected to the magnetic The ball 372 is connected, the magnetic ball 372 is embedded in the inner end of the sliding groove plate 374, and the end of the return spring 373 is connected to the head end of the magnetic ball 372 and is on the same center line. The ball 372 buckles with the front surface of the driving wheel 375 through the other end of the movable frame 371. The outer surface of the driving wheel 375 is attached to the end of the driving belt 376. The driving wheel 375 is connected to the driven wheel through the driving belt 376. 377 is connected, the front surface of the driven wheel 377 is buckled with the end of the transmission lever 378, and the head end of the transmission lever 378 is buckled with the front surface of the saw gear 325.
 Specifically, the reset button mechanism 38 includes a sealing plate 381, a reset button 382, a guide rod 383, a buffer spring 384, and a turntable 385. The reset button 382 is inlaid with the sealing plate 381, and one end of the guide rod 383 is connected to the reset button 382. The other end of the guide rod 383 is connected with the turntable 385, and the buffer spring 384 is installed in the reset button 382 by embedding.
 When the user uses the conveying device disclosed in the present invention, the article to be conveyed is first placed on the placing platform 2. The weight of the article presses down the weight plate 331, and the lowering of the weight plate 331 drives the hydraulic plate 335 to descend. The squeezing of the hydraulic oil in the hydraulic cylinder 334 pushes the detection plate 336 to move, and the detection plate 336 drives the sliding plate 342 to move to the right, cutting the coil barrel 343, so the resistance increases, and then the information is transmitted to the copper ring through the conductive wire 345 353, so that a magnetic effect occurs between the coil 351 and the permanent magnet 352, the greater the resistance, the greater the current generated, so that the generated magnetic effect is also greater, and then the electrode rod 354 transmits the information to the sensor 361, when the transmission device It gets stuck during transportation, and the conveying motor continues to drive the placement platform 2 to move, which will generate greater pressure on the weight plate 331. At this time, the current is greater and the magnetic effect value exceeds the set value. The sensor 361 is further analyzed and processed. The sensor 361 turns on the power and transmits the power to the U-shaped electromagnetic block 364, so that the U-shaped electromagnetic block 364 reacts with the magnetic ball 372 in a magnetic field after the power is turned on. The same poles repel each other, and the magnetic ball 372 is lifted up to make the magnetic ball 372. While moving upward, the driving wheel 375 is driven to rotate for half a cycle through the movable frame 371, so the transmission belt 376 is displaced by the rotation of the driving wheel 375, transmits the rotational force to the driven wheel 377, and drives the driven wheel 377 to rotate synchronously, so The driving wheel 377 drives the saw gear 325 to rotate forward for half a cycle through the cooperation of the transmission lever 378, and then meshes with the sawtooth plate 324 to drive the sawtooth plate 324 to move to the right, so the sawtooth plate 324 passes through the push frame 322 during the movement. Pull the movable contact 321 to the right to make the movable contact 321 separate from the fixed contact 326, thereby disconnecting the power connection of the conveying motor to prevent the conveying device from jamming and causing equipment damage. Then the serrated plate 324 passes the guide rod 383 when moving to the right The reset button 382 is pushed out to the right when the jammed condition is dealt with, the worker presses the reset button 382 again to start the conveying motor again and start normal operation.
 The present invention has been described exemplarily above. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements made by the method concept and technical solutions of the present invention are adopted, or the present invention has not been improved. The conception and technical solution of the direct application to other occasions are all within the protection scope of the present invention. The protection scope of the present invention should be subject to the protection scope defined by the claims.