Due to the limitation of volume and

Due to the limitation of volume and weight, the motor used for the point machine cannot be very powerful. In order to obtain the large torque of the driving switch, a reducer must be used to reduce the speed.Zd6-a switch machine reducer is composed of two stages. The first stage is the external meshing gear of fixed shaft transmission, that is, the small gear drives the big gear, and the reduction ratio is 103:27. The second stage is the involute inner meshing planet in the transmission reducer, and the reduction ratio is 41:1, so the total reduction ratio is 103/27×41/1=156.4.The internal gear of the planetary reducer is "fixed" in the reducer housing through the friction of the friction coupling. The inner gear is equipped with the outer gear. The outer gear is mounted on the eccentric bushing by rolling bearings. The eccentric sleeve is fastened to the input shaft with a key. There are 8 round holes in the outer gear, and each round hole is inserted with a roller rod with sleeve. Eight rollers are fixed to the output disk of the output shaft. When the outer gear rotates in a pendulum fashion, the output shaft rotates accordingly.(3) principal axisThe spindle is mainly assembled by the spindle, spindle sleeve, bearing, stop bolt, etc., as shown in figure 2.9, the spindle drives the locking gear, and completes the switch conversion and locking with the rack. The stop bolt on the spindle is used to limit the rotation Angle of the spindle, so that the locking gear and rack seat can reach the specified locking Angle, and ensure that both can maintain the best meshing state after each unlocking, so that the whole machine moves in coordination.