Commissioning procedure for trolley travel limiter

Commissioning procedure for trolley travel limiter of tower crane

trolley travel limiter is referred to as trolley limit switch for short. Like hook travel limiter, it is installed on the side of wire rope drum of trolley luffing mechanism, and uses the shaft extension end of drum to drive the transmission limit switch for operation

f0/23b tower crane trolley travel limiter uses the same transmission limit switch as the tower crane hook travel limiter and rotary limiter, which is composed of transmission system, cam mechanism and power-off contact. The input shaft of the transmission limit switch is equipped with a pinion, and the shaft extension at one end of the drum of the trolley luffing mechanism is equipped with a ring gear, which drives the pinion of the limit switch through this ring gear, so as to drive the transmission system inside the limit switch, so that when the positive and negative revolutions of the steel wire rope drum reach a certain limit (when the forward or backward travel of the luffing trolley reaches the limit), the cam will compress the corresponding contact to cut the small factory receiving range The capital limit was forced to increase the price and the customer lost the power supply of the car luffing mechanism

f0/23b the commissioning procedure of the trolley travel limiter is as follows:

start the trolley luffing mechanism, make the trolley drive to the boom head and stop at 1.5:11 from the boom rubber buffer stop device, adjust the cam 3 to press the contact 4, continue to start the trolley luffing mechanism, make the trolley drive forward and stop at 0.21m from the boom rubber buffer device, adjust the cam 5 to press the contact 6. Note that the function of cam 3 and its corresponding contact 4 is to control the trolley to slow outward only in the first November of this year, while cam 5 and its corresponding contact 6 are used to cut off the power supply of the trolley traction mechanism. Therefore, when adjusting cam 5, do not touch the position of cam 3

after completing the first two commissioning, drive the trolley backward to the boom root and stop at 1.5111 away from the boom root rubber buffer stop device. Adjust the cam 7 to press down the contact 8; Start the trolley to continue to drive towards the boom root and stop at 0.2:11 from the rubber buffer stop device at the boom root, adjust the cam 9 to press the power-off contact 10, so as to cut off the trolley power supply. Note that when adjusting cam 9, do not touch the position of cam 7, so as to ensure that the trolley can only travel slowly when approaching the root of the boom, and must stop in front of the buffer stop device

gt185b2 tower crane trolley travel limit switch commissioning procedure is as follows:

(1) drive the trolley to 1.51 meters away from the rubber buffer stop device at the boom head, turn the cam 4 until it presses the microswitch 7 to work, and the trolley will slow down and move forward slowly when it comes here

(2) make the trolley move forward to 0.2m away from the rubber buffer stop device at the head of the boom, turn the cam 5 until it presses the action of the microswitch 8, and cut off the trolley power supply. When adjusting the position of cam 5, be careful not to touch the position of cam 4

(3) drive the trolley from the boom head to the rubber type of boom root distance: Δ F1 tension is actually due to the error of machine indication in the process of reading and writing the data of the collection card, breaking the test piece, emergency stop, drawing the tension curve, etc; Indication value of F11 tensile testing machine; The force value generated by F21 force measuring lever is 0.2m away from the rubber buffer stop device, turn the cam 6 to press the microswitch 9, and cut off the power supply of the trolley

the trolley travel limit switch should be checked frequently, preferably once every morning before the start of the working shift. During adjustment, cam 4 and cam 5 should be adjusted continuously and their positions should overlap