Patent GB-191127334-A (GB)
Title: Improvements in and relating to Axle Trucks for Railway and Tramway Vehicles.
Inventor: CURWEN SAMUEL MOORE
IPC: B61F5/32
Filed: 1911-12-06
Granted: 1912-01-25
Abstract: 27,334. Curwen, S. M. Jan. 28, [Convention date]. Axle-bearing guiding- arrangements; a x l e - trucks; springs, arrangement of. - The pair of axles supporting a railway or tramway vehicle are each adapted to radiate about one axlebox, such pivotal axlebox for one axle being on the opposite side of the vehicle with respect to the pivotal axle-box of the other axle, and means are provided for causing the axles to radiate together. According to one construction, Figs. 2 and 3, the pivotal axle-boxes 16 are cylindrical, so that they may turn in the correspondingly shaped yokes 8, and are further provided with the pivot rod 18 passing through the tie-bar 19. A spring 17 supports the side frame 7. At the other ends of the axles the axleboxes 20 are adapted to swing in wide yokes 9 by means of posts 24 suspended from springs 23 mounted on lugs projecting from the axlebox and pivotally connected at their lower ends to the yoke brace 25, for instance, as described in Specification 22,682/10. Simultaneous radiation of the axles may be effected by a diagonal rod connecting the swinging axle-boxes 20, or, as shown in Fig. 3, by links 36, 39 and levers 37. To support the inner end of the motor casing 27 so that it may follow the movements of the axle while maintaining a rigid connexion with the truck in the line of travel, it may be provided with a projection 30 having a head which moves in a diagonally - arranged guide 32 secured to the cross-members 33 of the truck frame 7, or lugs 42, Fig. 5, on a pivot 41 mounted on the casing may engage slots 44 in a bell-crank lever 43 pivoted to the truck frame at 45 and connected by link 48 with a similar bell-crank connected to the other motor, thus providing also a means for effecting simultaneous radiation of the axles. Further means for supporting the motor comprise a bar 54, Fig. 7, with extensions 55, 58 sliding on roller hearings 57, 59 on the side frames 7, or the bar 54 may be suspended by rollers at its central portion from a suitably bent cross-bar secured to the side frames. A number of modified arrangements for mounting the truck frame or frames upon the axle-boxes are shown. Fig. 15 shows a pivotal axle-box having spring posts 84 as in the case of the swinging axle-box 20 of Fig. 2. The lower T-shaped head of the posts are connected by pins 85 with the block 86 trunnioned at 87 to the side frame 7. In this case a short side frame of the shape shown is provided for each axle. It is guided for vertical movement by the projections 92 and blocks 93. The pivot, instead of being arranged centrally of the axle-box as shown, may be provided by ears formed on the axle-box behind one of the ears 81 and pivoted to an horizontal bar secured to the side frame 7. According to Fig. 17, the car sill 117 is mounted by the springs 115 upon an independent yoke or pedestal 114 supported upon the axle-box 105 by the spring 106, of which the cap 107 is pivoted at 113, and has a ball bearing 109. In Fig. 18, pedestals 119 depend from the car sills and are connected by flexible or rigid tie-bars 122 supported from the axle-box by the spring posts 125 as previously described. A pivot 136 on the axle-bar projects through the bar 135, and lugs 137 embrace the springs 122. A pivot may replace the lugs 137. This design may be employed for the free end of the axle by omitting the lugs 136, 137 and bar 134. Fig. 13 shows an arrangement for the free end of the axle in which sliding rods 72, spring-mounted upon an independent yoke 67 carried by the axle-box 66, are provided with rollers 75 running in guides 76 secured to the sill 77. The guides 76 are inclined to assist the axle to return to the normal position. This arrangement of spring-mounted rollers may be applied where a truck frame of the kind shown in Fig. 2 is employed. In this case, the sliding rods 72 replace the posts 24, Fig. 2, and the guides 76 are secured to the upper part of the yoke 9.