US2637278A

US2637278A - Resilient mounting for a plurality of machines

Info

Publication number: US2637278A
Application number: US119636A
Authority: US
Inventors: Albert G Dean
Original assignee: Budd Co
Current assignee: ThyssenKrupp Budd Co
Priority date: 1949-10-05
Filing date: 1949-10-05
Publication date: 1953-05-05
Anticipated expiration: 1970-05-05

Description

y 1953 A. G. DEAN RESILIENT MOUNTING FOR A PLURALITY OF MACHINES Filed Oct. 5, 1949 2 $HEET.S-SHEET l A TTORNEY y 1953 A. G. DEAN RESILIENT MOUNTING FOR A PLURALITY OF MACHINES Filed 001;. 5, 1949 2 SHEETS-SHEET 2 INVENTOR. fimberi CT. Decm. BY W G M ATTORNEY Patented May 5, 1953 RESILIENT BIOUNTING FOR A PLURALITY OF MACHINES tion of Pennsylvania Application @

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5, 13%, Serial N 119,636

7 Claims. 1

This invention relates to machine mountings, particu irly to resilient mountings for a plurality c lea-chines having difiierent vibration frequencies and one or more of which have an extraneous torque connection, and has for an object the revision of improvements in this art.

The option has been developed and will be discus l in connection wi a res lient mounting" for a eener..tor and compressor beneath a rail o of these machines being driven exas by an engine, and being connected in g relationship with the other machine. iaoliines have different and periods of n, hence if they it separately mounted .13 connected in mutual driving" relationby a belt, it would be cult to maintain proper d" 3 relationship between them. To avoid this trouble, the present invention provides a common mounting for the two es.

The machines may also be of different weights as well as of different vibration characteristics, hence they are mounted on a support which provides a general balance of moments. lhis not only furnishes a static balance when the machines are not operating but absorbs the different types of operational vibrations better than would a support with arms of equal length for the unequal weights. ll resilient stay or guy rod is provided to resist unbalanced vibratory forces and the torque created through the extraneous drivins connection.

The objects and various novel features of the invention will be apparent from the following description of an exemplary embodiment thereof, reference being made to the accompanying drawings, wherein:

Fig. l is a plan view taken just above the floor pans or channel cross floor beams of a railway car, with parts cut away to show apparatus mounted therebeneath;

Fig. 2 is a vertical section and elevation taken on the line 2--2 of Fig. 1;

Fig. 3 is a side elevation and section taken on the line 3-3 of Fig. 2;

Fig. 4 is a perspective View of the mounting frame alone;

Fig. 5 is an enlarged vertical section of one resilient support element, the section being, taken on the line 55 of Fig. 3; and

Fig. 6 is an enlarged vertical section taken about on the same plane as Fig. 2 and indicated by the zone 6 of Fig. 2 but having parts broken away.

In the drawing the center sill or a car is indicated by the numeral 10, the floor pan or floor or LJK 2 channel cross beams by the numeral Ii and the side sill by the numeral 12. To the center sill there are secured, as by rivets, a number of depending brackets 53 having loop-like depending portions it for supporting equipment which will be described.

The equipment to be supported may comprise a compressor it and a generator it. The coinpressor may supply compressed air for brakes and the generator may supply electric current for car lighting and battery charging. One or the other oi the devices ll, it, here the generator it,

is driven by a prime mover, for example a diesel engine or the car axle (not shown) as by a shaft it" flexible couplings 2t, and this then drives the other through belting El and pulleys If the car carries two prime movers and one or both should be disabled, it is possible to have the generator (having suitable characteristics) act as a motor operating on current from the other generator of the car or from battery to continue to drive the compressor, suitable known one-way drive means being incorporated in the shaft l 9 so it will not be necessary to drive the main prime mover. The large s ze of the shaft indicates the presence of such a one-way drive device such, for example as an overrunning clutch device.

The devices H and it are of difierent weight, have different speeds and vibration characteristics and, as stated, to one of them driving torque, which in itself may be vibrating, from outside their support is applied, as by the shaft it. It is desirable to minimize the total vibration on the car, however, and this is done here by mounting the devices together on a resilient sup port so that their combined inertia will resist the various vibrations which are normally out of phase and the resultant vibrations are damped in the resilient mounting. The devices are mounted at such distances on each side of an intermediate point of support as to form substantially equal weight-arm moments to balance each other about the support.

As herein shown, a frame 25 is mounted on the bracket loops It by bolts 26 and resilient sleeve elements 2], such as rubber, placed in shear. The frame comprises ribs 28, some of which are l.- shaped. and extend out laterally to support one of the devices, as l l, and a bent plate 29 secured, as by Welding, to the vertical parts of the ribs. The plate includes a top flange 36 having holes in which the bolts 28 are secured. The resilient element of rubber or the like is preferably bonded to an inner sleeve 3i and an outer sleeve 32,

the latter having a supporting flange 33 at the upper end. A large washer 34 is placed on the bolt to act as a safety support in case the resilient sleeve should fail or yield too far.

The device 18 may be mounted on a bracket 36 which is bolted to the vertical plate, as by bolts 31. The bracket may be considered as a part of the general supporting frame for the two devices 17, I8.

Unbalancing forces, such for example as the torque through shaft E9, the sway of the car, the action of centrifugal force and gravity as the car turns curves, and the like, may be taken by a brace or guy rod 40 secured at one end to the frame 25 and at the other end to the side sill [2 of the car. The connection to the frame is through a bent bracket M located, longitudinally, at about the center of mass of the devices [7, l8 and their supporting frame. Resilient elements 42, as of rubber, are connected between the reduced bolt-like ends of the rod and the anchorages therefor. The resilient elements may comprise separate rubber washers sandwiching between them the anchor element, with a metal sleeve 44 inside and washers 45 on the ends clamped between nuts 46 on the rod ends.

The anchor bracket ii at the lower end has already been noted. At the upper end a bracket 50 serves as the anchorage, the bracket being welded to a bent stiffener as by are Weld fillets 52 and being hung at the other end on the inturned flange of the car side sill. A stiffener plate 53 is resistance-welded to the vertical plate of the side sill and the heavy bent stiffener iii is secured to the floor and to the plate 53, as by plug welds 54. At one or both ends of the assembly an end cap 55 is secured as by edge arcwelding 56. The end cap greatly stiiiens the box assembly thus created.

In operation, the vibrations of the devices are resisted by their combined inertia and absorbed in the resilient mountings so that little vibration is felt or heard in the car. The parts are balanced in a single plane of support and braced on the side so as to throw all the forces on the center sill with none of any appreciable magnitude in the floor pans and side sill. The mounting is very simple and inexpensive and easy to install or remove.

While one embodiment has been illustrated and described it will be understood that there may be various embodiments within the scope of the invention.

What is claimed is:

l. A machine mounting, as for mounting machines beneath a rail car, in combination, a center sill, a base resiliently supported from said center sill at a point between the ends of the base, a compressor machine mounted on said base at one side of its point of support, a generator machine mounted on said base at the other side of the point of support, the weight of the compressor multiplied by its effective lever arm and the weight of the generator multiplied by its effective lever arm producing moments about said point of support which are approximately equal, a drive connection between said generator and compressor, a torque drive connection between one of said machines and a device mounted ofi said base beneath the car, a side sill, and a resilient guy rod between said base and said side sill.

2. A machine mounting, as for mounting machines beneath a rail car, in combination, a base resiliently mounted at a point between its ends beneath the car, a compressor machine mounted on the base at one side of the point of support and a generator machine mounted on the, base at the other side of the point of support, the machines making approximately equal moments about the point of support, a drive connection between the machines, and a torque drive connection between one of the machines and an extraneous machine mounted beneath the car.

3. A machine mounting, as for mounting machines on a rail car, in combination, a base having an upstanding intermediate part and a support part extending outward from each side of the lower portion of the intermediate part, resilient swingable suspension means for the upper portion of said intermediate part, machines mounted on the support parts, a torque drive connection between one of said machines and an outside machine, and a resilient guy rod connected between said base and a fixed part on the car.

4. A machine mounting for a plurality of machines, comprising in combination, a base sup ported on a fixed part between machines carried thereon at a point which provides approximately equal moments on each side of the point of support, torque drive means between one of the machines from an outside device, a drive connection between machines on opposite sides of the point of support, and a guy member connecting said base to a fixed part.

5. A machine mounting comprising in combination, a frame including a base and an upwardly extending stem on said base, said stem being resiliently supported by rubber-like cushions at its upper end upon a fixed part for limited lateral and vertical movement, a machine supported on said frame at each side of the stem, and a brace member having resilient anchorages at each end connecting the base to a fixed part.

6. A machine mounting comprising in combination, a frame including a base and an upwardly extending stem on said base, said stem being resiliently suspended by rubber-like cushions at its upper end upon a fixed part for limited lateral and vertical movement, a machine supported on said base at each side of the stem, a torque drive between an outside device and one of said machines, and a brace member having resilient anchorages at each end connecting one side of the base to a fixed support.

7. A machine mounting comprising in combination, a frame including a base and an upwardly extending stem on said base, said stem being resiliently suspended by rubber-like cushions at its upper end upon a fixed part, a compressor machine supported on the frame at one side of the stem, a rotary electric machine supported on the frame at the other side of the stem, a driving connection between the machines, said machines being approximately balanced about the point of suspension, a torque driving connection between one of said machines and an outside device, and a resilient lateral connection between the lower part of the frame and a fixed part.

ALBERT G. DEAN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,514,607 Ellis Nov. 11, 1924 1,808,939 Summers June 9, 1931 2,110,701 Farmer Mar. 8, 1938 2,117,919 Summers May 17, 1938 2,347,190 Goldhof Apr. 25, 1944