US2355450A

US2355450A - Car truck

Info

Publication number: US2355450A
Application number: US430889A
Authority: US
Inventors: Charles P Leese
Original assignee: Standard Car Truck Co
Current assignee: Standard Car Truck Co
Priority date: 1942-02-14
Filing date: 1942-02-14
Publication date: 1944-08-08
Anticipated expiration: 1961-08-08

Description

Aug.s,1944. Q P, LEES; 2,355,450

CAR TRUCK Filed Feb. 14', 1942 'Y 2 sheets-sheet 1 j ye/2507*.; idf/9.5* e656 Aug. s, 1944. C, R EESE i 2,355,450.

CAR TRUCK YFiled Feb. 14, 1942 2 sheets-sheet 2` Y @M @2f compression, are di the vibratory movements at Patented Aug. 8, 1944 FICE y CAB. TRUCK chula r. um, chics, nl., minniio sum1- ard Cir Truck Company, Chicago, lll., a oorporation of New Jersey Application February 14, 19472, Serial No. 430,889

3 Claims. ((1 X05-224) This invention relates to a railway car truck of the type comprising a bolster on which the car body is supported, a pair oi' side frames, journal boxes, the usual wheels and axles, load carrying springs, and stabilizing means for snubbing or damping the vibratory movements, of eompression and expansion, of the load carrying springs. The invention is also concerned, preferably, with a truck .provided with roller means between the bilizing means for the load carrying springs, and

also, preferably, lateral motion devices, but which is of novel and improved construction whereby certain advantages, as will be hereinafter set forth, are obtained.

These advantages result from constructions and combinations of parts substantially as follows: The journal boxes are slidably arranged in pedestals or guides at opposite ends of the side frames. 'I'he load carrying springs, one or more for each Journal box, are disposed between the tops of the journal boxes and the undersurfaces of upper webs of the side frames. Wedges are interposed between the side walls of the pedestals and wedge faces formed on the journal boxes, and stabilizing springs, lighter than the .load carrying springs and preferably always under ed between the wedges and the upper webs o the side frames.-

By these arrangements the relative movements as between thejournal boxes and side frames. compressing and permitting theexpansion of the load carrying springs, are snubbed or damped by the action of the spring pressed wedges so as to prevent the compression of the springs to their limits which, if it occurs, is likely to result in the breakage of the springs, `and in any event. renders the load carrying springs ineffective. According to the present invention, this stabilized spring action fore, separately at each wheel without any of l one wheel being transmitted through the side frames and bolster to the other wheels. This improves the spring support of the car, for example, when the car is travelling over a railway vtrack in which the rail joints are staggered and lessens wear on the moving parts of the spring support of the csr.

The bolster is guided in its lateral movements but has no vertical movements and consequently no vertical motion guides so that wear on the bolster is minimized.

Furthermore, it is possible, because there are takes place, thereno springs between the bolster and side frames. fto locate the bearings of the bolster on the side frames. that is the .antifrictiom lateral motion devices which are disposed between the ends of the bolster and side frames, at low points on said side frames. This makes possible the location of the lateral motion stops, which limit the lateral movements of the bolster, also at low levels. and preferably at substantially the level of the journals. so that when shocks occur between the stops. which may happen occasionally, these shocks will not cause turning thrusts against the side frames, tending to cramp the sliding movements of the journal boxes, which would be likely to occur if the stops were arranged at higher points on the side frames.

The brake rigging. which is hung from the sidel frames, is spring supported instead of being carried by unsprung side frames, whereby chatter and wear are minimized.

Because there are no springs between the bolster and side frames the depth of the side frames may be reduced, increasing the clearance between the side frames and rails.

The removal of the wheels and journal boxes is facilitated as will be hereinafter described.

The invention is illustrated in the accompanying drawings, which exemplify a preferred embodiment of the invention, and in which Rig. 1 is a side elevation of the trucs.

Fig. 2, a fragmentary side elevation of the same. on a larger scale, 'with parts of the side frame, journal box and associated elements shown in section.

Fig. 3 is a -plan view cf one end of the truck.

Pig. 4 is a plan view of the journal'box showing, partly in section. the load carrying springs and, on the right hand side, the stabilizing wedge and its spring. f f

Fig. 5 is a detail sectional view on line 5-l of Hg. l: and

Fig. 8 is a detail sectional view, with the scale somewhat enlarged, on line l-I of Fig. 5.

It will be understood that the truck comprises two side frames, a bolster, two lateral motion devices, one at each end of the bolster, four journal boxes, each with its load carrying springs or springs, and its pairs of wedges and 'their stabiliaing springs, together with, of course, the usual four wheels, two on au axle. In describing the truck it will be necessary to describe in detail only one of each of the aforementioned truck elements. The others, where appearing in the drawings, will be given the same reference numerals.

Referring to the drawings, the wheels are indicated at Il (Fig. l); one of the axles at Ii (Fig. 8); a side frame at I2; the truck bolster at Il; the journal boxes at Il; the load c 'ing springs, preferably two arranged one within the other, at Il, it; the stabilizing wedges at l1; and the stabilizing springs at |18.

The side frames l2 are formed with central openings IQ through which project the ends 2l of the bolster Il which are formed on their under sides each with a pair of grooves 2| (Fig. 5) to receive the lateral motion rollers 22 which bear on a roller seat 23 formed with two concavities 24, one for each roller. The roller seat 23 is arranged in a recess 25, formed on the lower web 2C of the side frame. If desired, shims 21 may be interposed between the side frames and the roller seats 22v to adjust the elevation of the bolster. 28 is a tie rod which lies under the bolster i3 and connects the side frames i2. Each end of the tie rod is bent over at right angles to the main portion of the rod, as indicated at 29 (Figs. 5 and 6). This bent over end, in each case, projects through a hole in a bracket Il on the lower web 2C of the side frame, and is perforated at 2| for a cotter pin 32. To prevent vibration a looped spring 33 is provided, the loop Il of which bears on the rod 28. 'I'he spring is .coiled at Sl-l around studs "-20 on the bracket 3l and the ends of this spring 31-31 bear against the lower web 2l of the side frame. By lifting the loop portions 34 of the springs 3l. the tie rod may be disengaged from the side frames when this is neceary.

At each end of the side frame is a pedestal or guide comprising side walls ll, l! (Fig. 2) provided preferably with wear plates 4l, and formed with guide nanges Il, 4i. The side walls Il, I2 are formed with bottom flanges v42 to which is secured, by bolts Il, a bottom or tie plate Il. The journal box il is formed with box-like guide structures 4I, II, projecting into the channeled spaces provided by the guide flanges 4|. 'Ihere are slight clearances preferably between the guide structures and the wear plates 4I. These

guide structures

45, 45 are formed at their upper ends with oblique webs or wedge faces It, Il, preferably provided with wear plates I1, Il. 'I'he stabilizing or snubbing wedges l1 are arranged in the spaces between the wear plates l1 on the journal box wedge faces Il and the channeled guides on the side frame. The wedges are formed with horizontal surfaces Il providing seats for the stabilizing springs Il. The wedges are formed, preferably, with extensions 4l to increase their vertical bearing surfaces. The load carrying springs il, Il are interposed between the top web Il of the journal box and the under side of the upper web Il of the side frame. ing springs Il are interposed between web ll of the' side frame and the wedges I1 and are prei'.- erably under some compression when there is insumcient load'to compress the load carrying springs Il, It.

In Fig. 2 the journal box brass is indicated at l2, the wedge at I3, and the wheel journal at Il. The journal box is formed on opposite edges of the oblique wedge Asurfaces u with guide ribs Il, the wear plate 41 being arranged between the guide ribs as indicated at the left hand side of Fig. 4.

8l is a stop lug on the bolster adapted with stop lug 5l on the side frame (Fig. 5) to limit the lateral motion of the bolster. It will be observed that these stop lugs are located at low points on the bolster and side frames so that they are substantially at the level of the centers of the wheel journals M, as will be apparent from Figs. 2 and 5. In case lug 56 comes into contact with lug Il the, shock gives no turning thrust to the side frame which, if it occurred, would tend to cramp the movements of the journal boxes.

Preferably openings 5I (Fig. l) are formed in the side frames, and aligned with these openings are openings 59 in the wedges Il. The wheels and journal boxes may be removed by detaching the tie plates M from the pedestals of the side frames and jacking up the car by means of jacks placed under the side frames. The operation of removing the wheels and journal boxes is, therefore, much simplified in comparison with that necessary with other types of trucks. When such removal is to be eiected, rods can be thrust through the aligned openings l2, 59 to hold up the wedges and stabilizing springs. The load carrying springs will come out with the journal boxes.

I claim:

1. Car truck comprising: side frames having guide members at opposite ends thereof; means for supporting a car body on said side frames with capacity for lateral movement in respect thereto; journal boxes slidable in said guide members; load carrying springs interposed between and engaging the journal boxes and side frames; stabilizing devices for said load carrying springs comprising a pair of wedges interposed between each journal box and adjacent portions of the side frame and springs bearing on said wedges respectively; and said side frames and wedges being formed with aligned openings adapted to receive rods to hold the wedges and stabilizing springs in position when the journal boxes are removed.

2. A car truck comprising side frames, each provided at each end with a pair of spaced vertical, channeled guide members; journal boxes having forward and rear extensions slidably fitted between said pairs of guide members which extensions are formed with vertically extending fiat bearing faces of substantial height and width and which merge at their upper ends with oblique wedge faces and with guide ribs at opposite sides of said wedge faces whereby the vertical forward and rear bearings of each journal box for bearing against the guides of the frame are extended above the lower terminations of said oblique wedge faces; load carrying springs interposed between and engaging the tops of the journal boxes and under surfaces of the side frames; wedges engaging the tops of the journal boxes and theunder surfaces of the side frames; wedges positioned on said oblique faces of the journal boxes and engaging adjacent faces of said vertical guide members and stabilizing springs interposed between said wedges and opposed under surfaces of the side frames.

CHARLES P. LEESE.