US2215421A

US2215421A - Brake disk

Info

Publication number: US2215421A
Application number: US276578A
Authority: US
Inventors: Carolus L Eksergian
Original assignee: Budd Wheel Corp
Current assignee: ThyssenKrupp Budd Co
Priority date: 1939-05-31
Filing date: 1939-05-31
Publication date: 1940-09-17
Anticipated expiration: 1957-09-17

Description

c. L. EKSEI-QGIAN Sept. 17, 1940.

BRAKE DISK 0 o fix k m 7 4 Q 5:; QA 3:; a 5:; a

I 1 & V k 7 5 m 3 M8 INVENTOR Filed May 31, 1939 ATTORNEY Patented Sept. 17, 1940 BRAKE DISK Carolus L. Eksergian, Detroit, Mich., assignor'to Budd Wheel Company, Philadelphia, Pa., a cor-' poration of Pennsylvania Application May 31, 1939, Serial No. 276,578

8 Claims.

In said type of brake, the braking surfaces are the sides of a ring, usually made of cast iron or the like, and often two rings spaced from one another to afiord a passage for cooling air between them.

The present invention is of importance where especially strong and rigid twin brake rings are necessary,

and consists in providing crossed braces between the ringsin place of the I-shaped struts which extend at right angles to the rings in the form disclosed in the above named-copending case.

The braces herein used are preferably in the general configuration of the letter X, thus affording exceptional strength and rigidity, and making the brake rings amply strong enough for the most severe braking of theheaviest vehicles.

Cooling vanes are braces, and the relative numbers and spacings interposed between the of the vanes and braces are to a great degree immaterial.

therewith.

Fig. 2 is'a section through the structure illustrated in Fig. l, on the planes indicated by the broken line 2-2 of said figure.

Fig. 3 is a developed peripheral view of a brake ring, wherein six coolingvanes are interposed between the successive X braces.

Fig. 4 is a similar view wherein half as many cooling vanes are located between the said successive X braces, whichare accordingly spaced somewhat farther apart.

Referring first to Figs. 1 and 2, I designates the disk or web portion of the brake, which may have any desired number of holes 2 therein, for the bolts 2a which fasten the disk to the wheel W or axle.

stiffening and centering flange may be provided at the central part of the web I if desired.

The brake rings proper are designated by ref-,

It will be noted th vet) I is here disclosed .ing the cooling effect.

as integral with the brake ring 4, in fact the entire structure disclosed in Figs. 1 and 2 is a single casting in each instance.

The X-shaped cross braces 8 are arranged at any desired intervals, as shown in all the figures, and between successive braces are located the cooling vanes 9. It will be noted that the braces 8 are very heavy and provide a very substantial and rigid connection between the rings 4 and '5. 10

The cooling vanes or fins 9, however, are relatively thin and the-fins ofeach pair do not extend all the way across the space between the rings, since their function issolely to assist in disposing of the heat generated in braking, and

not to brace the rings.

A large surface area is thus produced between the rings 4 and 5, which is beneficial in increas- Even the passages l0 within the braces 8 are useful in this respect, and thus the said braces will also act as sooling vanes to a certain extent.

All the junctions between braces or vanes and rings are generously filleted, to provide smooth passages for the cooling air and thus minimize 3 the resistance to the air flow produced by the vanes, acting as a centrifugal blower, when the structure is in rotation.

The vanes 9 preferably are tapered in a radialdirection, that is, they are narrower at their radially inner ends than at their radially outer ends (Fig. 2), so that thus the free area for air flow is substantially the same at the inner periphery of the rings 4 and 5 as at their outer one, whereby the air flow suffers the least resistance, as the air is neither compressed nor expanded in traversing the said spaces in a radially outward direction.

Obviously the exact. number of cooling vanes 9 is unimportant, either per se or relatively to the number of braces 8 nor is it necessary that the vanes 9'be placed symmetrically in opposite pairs,

as illustrated, since the number of vanes on ring 4 need not be the same as that on. ring 5. While six vanes have been shown in each large radial passage in Fig. 3, and three in Fig. 4, it should be clearly understood that these are purely arbitrary numbers, which may be varied at will.

The operation of the invention will be clearly understood from its structure, and-briefly consists in providing adequate rigid cross-bracingbetween the two rings by virtue of the X-shaped braces 8 .and at the same time makingample provision for cooling by reason of the vanes 9.

While the web I has been disclosed as cast integrally with the rings 4 and 5, this also is an arbitrary feature, and obviously the web I may equally well be secured to the rings in any other way. The invention therefore is to be clearly understood to be defined solely by the following claims.

What I claim is:,

1. A cast metal brake disk comprising two cast metal rings, means for supporting them upon the rotating part to be braked thereby and braces integral with the rings, spacing them from one another, said braces having portions disposed at an angle substantially different froma right angle with respect to the planes of the rings.

2. A brake disk comprising another portion consisting of two substantially parallel cast metal rings, and a number of braces cast integrally with the rings and extending radially substantially the full width of the rings, said braces each being of X-shape in cross section.

3. A brake disk comprising a pair of cast metal rings, spaced from one another by X-shaped braces cast integral therewith, said braces being arranged at intervals along the rings, and cooling. vanes integral With the rings, disposed in the spaces between the said braces.

4. A brake disk comprising a pair of cast metal rings, spaced from one another by X-shaped braces cast integral therewith, said braces being arranged at intervals along the rings. and cooling vanes integral with the rings, disposed in the spaces between the said braces, said vanes extending inwardly from each ring, but only a part of the way across to the other ring.

5. A cast metal twin ring brake member, consisting of two substantially similar rings, connected and spaced from one another by inclined braces integral therewith, said braces being suitably spaced around the rings to provide a strong and rigid structure, the braces having radially extending passages therein to provide ducts for cooling air.

6. A cast metal twin ring brake member, consisting of two substantially similar rings, connected and spaced from one another by inclined braces integral therewith, said braces being suitably spaced around the rings to provide a strong and rigid structure, the braces having radially extendingpassagestherein to provide ducts for cooling air and a number of-vanes formed integrally with the brake member, and located between the braces, to provide air currents when the brake member rotates.

7. A cast metal brake disk comprising a ring, a second ring substantially parallel thereto, said second ring having a web extending inwardly therefrom, to serve as a mounting device, and radially extending braces, X-shape in. cross section, integral with the rings, extending substantially the full width thereof and rigidly connecting them in spaced relationship to one another.

8. A brake disk comprising a pair of cast metal rings, spaced from one another by braces spaced' from each other and having portions disposed at .an angle substantially difierent from a right angle with respect to the plane of the rings, and cooling vanes integral with the rings disposed in the spaces between said braces.

CAROLUS L. EKSERGIAN.