US2233540A - Journal box mounting - Google Patents

Description

i March 4, 1941. E. LATSHAW I JOURNAL BOX MOUNTING Filed Dec. 8, 1934 Patented Mar. 4, 1941 5 JOURNAL BOX MOUNTING Elmer Lats'haw, Philadelphia, Pa., assignor to The J. G. Brill Company, Philadelphia, Pa., a corporation of Pennsylvania Application December 8, 1934, Serial No. 756,600

, 10 Claims.

This invention deals with journal box mountlugs and especially with mountings wherein-the journal box will be resiliently-centered in the pedestal jaws, although it is equally advantageous in a bolster or similar mounting.

In previousjournal box mountings as constructed there has'been a metal to metal contact between the journal box and the truck frame which was necessarily noisy and transl mitted wheel noises to the truck frame and thence to the car body. Likewise a certain amount of looseness in a horizontal and especially in .a transverse direction was necessary which caused heavy hammer blows to "be transmitted l to the truck frame under braking forces and 25 It is another object of this invention to provide a journal box mounting wherein the journal box is resiliently held centered yet is provided with portions adapted to cooperate with the pedestal jaws to absorb heavy shock loads.

30 It is a still further object to provide a journal box mounting that will not transmit wheel noises to t e truck frame.

These d other objects will be-apparent to any one skilled in the art from a, study of the accompanying description and drawing in which Figure l is an elevation view, partly in section,

of a journal box mounting incorporating the present invention; Fig. 2 is a plan view, partly in section, of the -40 construction shown in Fig. 1, and,

Fig. 3 is an enlarged sectional view showing the relation of the journal box and one of the pedestal jaws.

Referring now to the drawing in which like" 45 numerals refer to like parts. The wheel A is attached to axle B which carries a journal box 6 supporting a conventional truck frame .D through the spring E. The truck frame is provided with the usual pedestal jaws 2, tie bar 4 50 and spring pocket 6. In the instance shown the spring is of the helicaltype, although any form may be used, and is preferably insulated from the truck frame or journal box by some resilient or non-resonant material. 65 The journal box C which is shown as of the roller bearing type has plates 8 attached to the usual jaw engaging portions on either side by the machine screws I0. Attached to plate 8, in some manner such as by vulcanizing, is a block of resilient material I2, preferably rubber, 5 which is also attached to a plate ll thus forming a unit F. Plate ll rests against the pedestal jaws and is clamped immovably in place by the thrust members I 6 held on the frame by bolts l8. Any possible vertical movement of outer plates 10 I4 is also prevented by stop shoulders l1 formed on the pedestal jaws as clearly shown in Fig. 1. The thrust members, preferably of phosphorbronze, provide bearing surfaces 20 and 22 adapted to cooperate with bearing surfaces 24 and 26 respectively on the journal box. In the instance shown and as purely representative the surfaces and 24 are spaced one-eighth inch while surfaces 22 and 26 are spaced one-quarter inch.

rebound the rubber will be placed in shear and restrain the rebound of the spring. It is therefore seen that the unit will act as a dampener to 30 absorb any unusual vertical movements between the journal box and truck frame.

The provision of the clearances between surfaces 20 and 24 will allow the rubber on one side of the journal box to act in compression and on the other side in tension to absorb normal movement of the journal box in a longitudinal direction and yet will check this movement by contact of the surfaces before the rubber is overstrained. Thus any braking or similar forces will be absorbed by the rubber until they reach a certain value and then any force exceeding this value will be absorbed by the metallic bearing surfaces.

The clearances between surfaces 22- and 26 will allow a similar functioning of the unit in absorbing transverse movement with the exception that the rubber will be placed in shear to absorb any transverse movement of the journal 3 box up to a certain amount. I

.It is readily seen that the journalbox is tied resiliently and universally to the side frame by .means which will resistmovement in any direction up to a certain amount and that movement beyond this amount is prevented by metallic u contact, thus preventing a rupturing strain being placed on the rubber. It will also be seen that by designingthe unit as stated all normal forces are resisted by the rubber while all abnormal forces beyond a certain value are absorbed by the metallic contact thus permitting the use of a smaller unit than would be necessary if rubber alone absorbed the entire force.

Although one specific arrangement and applicationof the invention has been shown and described it is to be understood that the invention may be adapted to other uses such as bolster mountings and that it is to be limited only in accordance with the appended claims. A

What is claimed is: 1. In a journal box mounting for a railway truck frame, longitudinally spaced pedestal jaws, a journal box located in the space between the jaws, longitudinally'spaeed resilient means including rubber loaded in shear connecting said box and jaws for universal movement of a predetermined amount, andmeans preventing such movement beyond said predetermined amount in at least certain directions.- 1

2. In a journal box mounting,- spaced pedestal jaws, a journal box, resilient means including rubber shear springs positively connecting said box andjaws and adapted to yieldingly center the box in the space between the jaws by acting in compression, and means preventing'excessive yielding of said resilient means in both shear and compression. I

3. In a journal box mounting, pedestal jaws, a

journal box between said jaws, means connect- 7 ing said journal box and jaws including a re,- silient element comprising rubber having plates vulcanized to opposite faces thereof, said conpedestal jaws andjournal box for preventing relative movement therebetween beyond a predetermined amount.

4.In a journal box mounting for a railway truck frame, longitudinally spaced pedestal jaws on the frame, a journal box having bearing surfaces projecting on either side of the frame, rubber shear springs positioned in the space between the pedestal jaws and journal box to restrain the movement of the latter, and means carried by the pedestal jaws and co-acting with the projecting bearing surfaces of the journal box for limiting the movement of the journal box. 2

5. In ajournal box mounting, spaced pedestal jaws, a journal box in the space between the pedestal jaws, resilient members having plates fixed to opposite sides thereof and positioned, in the space between the journal box and pedestal jaws, and means fo'rfastening the plates to the adjacent pedestal and journal box walls.

-6. In a journal box mounting, spaced pedestal jaws, a journal lb'ox positioned in the space between the pedestal jaws, resilient members hava ing spaced plates fixed thereto positioned in the space between the journal box and the pedestal jaws, means for securing one of the plates of each resilient member-to said journal box in the space, thrust members fixed to the pedestal jaws, and means carried by the thrust members for engaging a plate of each resilient member.

r, 7..In a journal box mounting, spaced pedestal jaws, a journal box positioned in thespace between the pedestal jaws, spacer units positioned in the space between the journal box and pedestal jaws andeach including a body of resilient material having fixed thereto inner and outer metallic plates, means for securing the inner plates tothe journal box, and means for removably securing the outer plates to the pedestal jaws.

-hal box and pedestal jaws, means for securing the inner plates to the journal box, thrust members removably secured to opposite, portions of the pedestal jaws in such a position as tocooperate with adjacent portions of thefjournal box, and means carried by the pedestal jaws, for engaging the outerplates. I

9. In a journal box mountin pedestal jaws, a. .journal .box positioned between the pedestal jaws, spacer unitseach includinga body of resilient "material having fixed thereto innerand outer metallic plates positioned between the journal box and pedestal jaws, means for securing the inner plates to the journal box, thrust members including bearing elements fixed to the pedestal jaws in such, a position as to cooperate with adjacent portions of the journal box, means;

carried by the thrust members for engaging the outer plates, and means on the journal box engaging the bearing elements for positively limiting the movement of the parts. I

10. In a railway truck, in combination with a side frame having a downwardly opening pocket defined by jaws, each jaw having a pocket opening toward the other, a journal box disposed between said jaws and having pockets opening toward said jaw pockets, and a pad of resilient rubber disposed between each jaw andthe adjacent wall of said box received in said pockets, each pad having at least one of the wearing'surfaces eng ed by said box and the associated jaw, provided with a metal wear plate secured thereto. a I

ELMER LATSHAW;

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