US1757272A

US1757272A - Car truck

Info

Publication number: US1757272A
Application number: US283806A
Authority: US
Inventors: Howard D Taylor
Original assignee: FLEXIBLE TRUCK CORP
Current assignee: FLEXIBLE TRUCK Corp
Priority date: 1928-06-08
Filing date: 1928-06-08
Publication date: 1930-05-06
Anticipated expiration: 1947-05-06

Description

H. D. TAYLOR May 6, 1930.

CAR TRUCK Filed June 8, 1928 2 Sheets-Sheet 1 mm mm IHA R lily/(am:

' J flown/a D. Taylor M /W w ws.

H. D. TAYLOR May 6, 1930.

CAR TRUCK Filed June 8, 1928 2 Sheets-Sheet 2 Patented May 6, 1930 UNITED STATES PATENT OFFICE HOWARD I). TAYLOR, F NEW YORK, N. Y., ASSIGNQR TO FLEXIBLE TRUCK GOBPO-r RATION, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF DELAWARE CAR TRUCK Application filed June 8, 1923. Serial No. 283,806.

The invention relates to car trucks of the type set forth in the United States Letters Patent No. 1,594,576 and No. 1,594,644, issued to me August 3, 1926, and in which carriers for the truck bolster are journaled in large bearing openings in the side frames, to permit the relative rocking movement of the side frames as the truck passes over irregularities of the track. To provide for the heavy loads imposed upon the truck in modern practice, and particularly to provide space for a sufficient number of springs, it is desirable that the carriers and the bearing openings of the side frames in which the carriers are journaled, shall be quite large. But the height of the central portion of the side frame is lim ited by the standard regulations with respect to the height of the truck center and the required track clearance.

In accordance with the present invention the large cylindrical bearing openings in the central portions of the side frames and the carrier rings journaled therein are provided with flattened or truncated upper portions that are spaced apart to permit the limited, relative rocking movement of the side frames.

The invention ishereinafter more fully set forth, is illustrated in the preferred form in the accompanying drawings and is particularly defined in the appended claims.

In the drawings:

Fig. l is a partial plan view of the improved truck. l

Fig. 2 is a side elevation thereof.

' Fig. 3 is a central transverse section, and

Fig. 4 is a detail section on line H of Fig. 3. i

The side frames are preferably substantially similar in construction to that shown in the co-pending application filed by me in the United States Patent Office March 18, 1926, Serial No. 95,529. Each side frame comprises upper and lower or compression and

tension members

10 and 11 integrally connected at their ends and provided with integral journal boxes 12. Intermediate the center and ends of the truck the upper and lower members .are connected by struts 13. Inner and outer spaced side walls of the side frame constitute the sides of the

members

10, 11 and 13, and

these side walls are connected by

transverse webs

14, 15 and 16, which extend respectively along the upper edges of the upper and

lower members

10 and 11 and along the lower edge of the lower tension member. The side walls are also connected by a continuous transverse web 17 which extends about and forms the central bearing opening 18 of the truck side frame.

The bearing opening thus formed is substantially cylindrical throughout the greater portion of its periphery, but is provided with a flattened or truncated upper portion and this part 19 of the transverse web is horizontal and substantially straight. The trans verse web 14 at the upper edge of the compression member 10 is also flat and straight at its central portion and together with the web 19 and the side walls form a closed box section for thecompression member above the central bearing opening. The web 17 merges into the central arc-shaped portion of the web 15 at the upper edge of the lower tension member, and together with the central portion of the web 16 and side walls of this member form a closed box section for the tension member below the bearing opening. The side frame is thus provided with a central portion of stout construction, but it is particularly noted that the box sections of the central portions ofthe compression and tension members are of contracted height and the central portion of the upper member is flattened so that the bearing opening can be correspondingly increased in size.

As set forth in the prior application referred to, the ends of the compression member extend over and merge into the top walls of the integral journal boxes, and the ends of the tension member merge into the upper portion of the inner side walls of the boxes, the arrangement being such that the side frames have double box sections at points adjac'ent the journal boxes. Preferably, the transverse Webs 16 at the lower edge of the tension member are provided with openings 20 between the central and end portions of the side frame, so that these parts of the tension member and also the corresponding parts of the upper compress on member are of inverted U-shape in section. ,All of the openings of the side frame are provided at their edges with stiffening beads 21.

The carrier rings 22 which support the bolster and bolster springs, like the bearing openingsof the side frames in which they are journaled, are cylindrical throughout the greater portion of their peripheries, but are provided with flattened or truncated upper portions which are spaced from the flattened portionof the bearing opening to permit the rocking movement of the side frames. In the preferred form shown, the upper portion 23 which extends between the, sides of each carrier ring, is slightly arched to provide suflicient clearance for the correspondingly shaped end of the truck bolster. As set forth in the prior patents and application referred to, the carriers are interlocked'with the side frames by means of keys 24 arranged within pockets formed by walls 25 extending between the opposite sides of the transverse web 17 and transverse flanges 26 which extend between the side walls of the struts 13. Bolts r the inner ends of the keys extend through slots in the opposite sides of the carrier rings, the length of whichis such as to permit the limited rocking movement of the side frames. The carrier. rings are also provided at their lower portions with sills or spring plank seats 28 which project laterally beyond the other portions of the carriers. At their upper inner side portions the carriers are provided with guides 29 which co-operate with lugs 30 on the ends of the truck bolster 31 to interlock the carrier and bolster, whilepermitting the relative vertical movement of these parts.

The bolster 31 is preferably similar in construction to that set forth in United States Letters Patent No. 1,594,645, issued to me August 3, 1926. It comprises top, bottom, and side walls and end portions 32 of contracted height and each having an arched upper wall and a substantially horizontal lower wall forming a spring seat. The bol 'ster is also provided with stiffening flanges 33 which project downwardly below the spring seats at its ends. I

The spring plank 34 rests at its ends upon the sills 28 of the carriers and is provided with ofl'sets which interlock with openings in the sills. A set of springs 35 are mounted between plates 36 and are interposed between the end of the springplank and the end of the bolster, the plates 36 being preferably provided with offsets 37 which interlock with recesses formed in the spring-engaging portions or seats of the spring plank and bolster. The arrangement is such that, as set forth in the prior patents and application referred'to, the ends of the bolster can be inserted through the lower portions of the openngs in the carrier rings and then lifted to interlock with'th'e guides 29, the sets of springs serving to hold the bolster and spring plank detachably interlocked with the carriers. Preferably, the central portion of the spring plank is deflected downwardly and it is provided at its side edges with upturned stiffening flanges 38. Preferably, also, liner strips 39 formed of hard, non-ferrous metal, such as spring brass, are interposed between the surfaces of the carrier rings and the hearing openings in the side frame.

The improved construction provides ample space for a large number of springs within the carriers such as is required for heavy loads. At the same time the height of the central portions of the side frames is kept within the required limits and the side frames are free to rock in vertical planes without straining the other parts of the truck.

Obviously, changes may be made in the details set forth without departure from the scope of the appended claims.

Features of the present invention are more broadly claimed in a companion application filed by me in the United States Patent Office on June 8, 1928, Serial No. 283,805.

I claim as my invention:

1. A car truck comprising side frames having enlarged central bearings, chambered carriers journaled in said bearings and adapted to receive and interlock with the bolster ends and receive and support the bolster springs, the bearings and carriers having truncated upper portions permitting the relative rocking movement of the side frames.

2. A car truck side frame having central portions forming an enlarged bearing, a carrier journaled in said bearing and interlocked therewith and adapted to receive and interlock with the bolster end and receive and support the bolster springs, the bearing and carrier having truncated upper portions spaced to permit the limited rocking movement of the side frame, substantially as described.

3. A car truck side frame having central portions forming an enlarged bearing, a carrier ring journaled in said bearing and having a bolster receiving opening, bolster guides at the upper side portions of the opening and a spring supporting sill at the lower portion thereof, and means interlocking the carrier ring and side frame, the bearing and carrier greater portions of their peripheries and truncated at their upper portions, and keys fixed to the side frames and engaging elongated slots in opposite sides of the carriers, said truncated portions and the key and slot connections being arranged to permit the limited rocking movement of the side frames. 5. A car truck side frame having central portions forming an enlarged opening pr0- vided with a cylindrical bearing'surface and truncated at its upper portion, and a one piece carrier, chambered to receive the end of the truck bolster and bolster-supporting springs, journaled within said bearing and interlocked with said side frame and arranged to permit the limited rocking movement of the side frame relatively to the carrier, substantially as described.

6. A car truck side frame having an enlarged central part flattened at its upper portion and rounded at its lower portion and provided with a correspondingly shaped opening having a cylindrical bearing surface and a truncated upper portion, a carrier ring having bolster guides and a spring supporting sill journaled in said bearing opening and interlocked with the side frame and having a truncated upper portion spaced from the truncated portion of the bearing, substantially as described.

HOWARD D. TAYLOR.