Patent GB-1102290-A (GB)
Title: Improvements in apparatus for vibratory finishing
IPC: B24B31/06
Filed: 1965-10-29
Abstract: 1,102,290. Vibratory mechanisms. J. F. RAMPE. 29 Oct., 1965 [5 Nov., 1964], No. 45932/65. Addition to 1,023,616. Heading F2X. [Also in Division B3] A vibratory finishing machine includes (a) A frame; (b) A counterpoise including two counterpoise plates mounted within the frame and connected to it to be resiliently supported by a set of resilient mounting devices; (c) A carriage mounted within the frame between the counterpoise plates and connected to the frame to be resiliently supported by another set of resilient mounting devices; (d) An eccentric drive journalled in relation to the carriage and the counterpoise to produce orbital movement of one relatively to the other without rotating either of them; (e) Driving means arranged to drive the eccentric drive; and (f) A tub and counterweight mounted on the carriage on opposite sides of the axis of its connection to the eccentric drive and substantially balanced about that axis, the mass of the counterpoise being substantially equivalent to that of the carriage including the counterweight and the tub with its design load, while the eccentric drive and all parts rotating with it form an insubstantial fraction of the total weight carried by the resilient suspension means. The frame 10 comprises a base-plate 55 and upright legs 56, 57, (58), 59. The legs 56, 57 are connected by horizontal braces 62, 63 and the legs 58, 59 are connected by horizontal braces 64, 65. Side panels 67, 68 are bolted to the frame. The counterpoise comprises plates 15, 16. The plate 15 is supported from the frame braces 65, 64 by resilient bushings (105), 106, (109), 110 and the plate 16 is supported from the frame braces 63, 62 by resilient bushings 112, 113, 114, 115. The carriage 11 comprises plate (76), (77) and braces (78), (79), 80. A counterweight 103 is secured to the brace 80. The plates (76), (77), carry half-bearings (83), 84 receiving trunnions 85, (86) on the tub 12; the other halves 91, (92) of the bearings are secured by bolts 93. The tub can be tilted, to discharge its contents, by means of handles 94 after slackening the bolts 93. The plate (76) is supported from the frame legs (58), 59 by resilient bushings (116), (117), 118, 119 and the plate (77) is supported from the frame legs 56, 57 by resilient bushings 120, 121, 122, 123. Each resilient bushing comprises a block (126) of rubber or like resilient material having concave ends bonded to rigid cups (125), (132) welded to nuts (127), (133) receiving the fixing bolts (107), 108. All the resilient bushings are identical, those for supporting the counterpoise plates 15, 16 being used without spacers and those for supporting the carriage plates (76), (77) being used with spacers (136). A shaft 24 has eccentric portions 139, 140 running in bearings 25, 26 bolted to the plates (76), (77) of the carriage; lubrication of the bearings is effected by grease lines (170), (171) and inlet fittings 173, (174). The shaft also has eccentric portions 141, 142 (out of phase with the portions 139, 140) running in bearings 129, 130 secured to the counterpoise plates 15, 16; the bearings 129, 130 are provided with grease fittings accessable by removing the frame side panels 67, 68. The shaft 24 is driven through a belt 30 by an electric motor 22 mounted on the top of the frame 10. The motor pulley 28 has a fixed part 33 and a spring-pressed slidable part 34; the ratio of the belt drive is varied by adjusting the position of the motor 22 by a lead screw 48 operated by a hand wheel 50. The shaft 24 is driven at 900-1800 r.p.m.