Patent GB-204894-A (GB)
Title: Improvements in crushing apparatus
IPC: B02C2/06
Filed: 1922-10-02
Abstract: 204,894. Kennedy, J. E. Oct. 2, 1922. Crushers with gyratory heads.-In a gyratory crusher for stone, ore, &c., the crushing-member is mounted in an eccentric and a driver for the crushing-member is supported independently of the eccentric and has an operative connection with the crushing-member arranged to relieve the driver of the strains of the lateral thrust of the crushing-member. The gyratory shaft 10, Fig. 1, carrying the conical crushing-head 13 is supported at its upper end in the hub of a spider 12 mounted upon the crushing-chamber 8. A loose bushing 24 on the lower end of the shaft 10 has a ball portion 23 to engage in a socket portion 22 of an eccentric bearing-member 21, which is mounted in a sleeve 18 and rotates on an axis concentric with the axis of the chamber 8. The sleeve 18 is secured by bolts 20 in an opening in the bottom plate 19 of the base 7, or it may be integral with the base. The member 21 is made of longitudinally-split sections secured together by bolts passing through transverse rib portions 26. A spider 30 rotatably mounted on the part of the sleeve 18 below the plate 19 carries the rotor 28 of an electric motor and is connected to the bearing 21 by a plate 36 having a transverse rib 37 engaging in a slot 38 in a disc 39 provided on its opposite face with a slot 40 to receive the extended portion of the ribs 26 of the bearing. Endwise movement of the spider 30 is prevented by one end of the spider hub engaging a shoulder formed in the supporting flange of the sleeve 18 and a removable collar 31 at the end of the sleeve. The collar may have segmontal inwardly-extending projections to pass into segmental slots leading from the end of the sleeve 18 to an annular groove in the sleeve. The stator 29 of the motor is fixed to the plate 19 and is provided with an annular and spirally arranged lubricant well 52 from which lubricant is drawn by a pipe 53 and pump 54 and delivered by a pipe 55 to the upper end of the sleeve 18. A deflector plate 56 at the top of the spider hub extends over the top of the inner wall of the well 52, and the pump 54 may be driven by a belt 56<1> from a central hub portion 57 on the plate 36. A pulley may be substituted for the electric motor and connected to the bearing 21 as shown in Fig. 1. Fig. 3 shows a pulley 42 directly and rigidly connected to the bearing 21, a flange 43 on the bearing being bolted to the pulley and the opening in the bearing 21 being closed by a plate 45 bolted to the flange 43. Fig. 2 shows another method of connecting the bearing 21 to the driver. A plate 46 bolted to the hub of the driver has an inwardlyprojecting hub 47 with a lateral lug 48, and the key 50 secured in a slot in the lug 48 engages in a slot in an inwardly-extending lug 49 on the bearing 21. As shown in Figs. 2 and 3, the lubricant well is arranged in the pulley 42 and the oil passes therefrom by a pipe 60 to the top of the bearing owing to the rotation of the pulley. An annular flange 61 on the pulley prevents any splashing of the lubricant. The material to be crushed is fed through the spider 12, and the crushed material is delivered by a shoot 14 through an opening 15 in the base 7.