Патент USA US2407197код для вставки
Sept. 3, 1946. 2,401,197 R. wA-rTs BRAKE ROTOR l Filed Jan. 12, 1944 N 'QH , N O N N N N Il N l \ N. Il | l i" | |l | l H l ‘I li ll | N N Tl INVENTOR. 772/o7w7/ wol/ü@ Y / Patented Sept. 3, 1946 2,407,197 UNITED STATES PATENT OFFICE 2,407,197 BRAKE ROTOR Raymond Watts, Chicago, Ill., assignor to Ameri can Steel Foundries, Chicago, Ill., a corpora. tion of New Jersey Application January 12, 1944, Serial No. 517,942 3 Claims. (Cl. 18S-264) 1 2 My invention relates to brake discs and more dial friction faces I4 and IE respectively for coop particularly to a brake rotor adapted for connec eration with associated brake means. The fric tion to an associated rotating member, such as tion faces I4 and I6 are preferably in the form the wheel of a railway car truck, for cooperation of annular liners or wear plates secured to there with associated braking means. Cil spective plates 8 and Ill in any convenient man The general object of my invention is to de ner, such as bonding or welding; however, it will sign a brake rotor incorporating cooling means be understood that if desired these faces I4 and for transmitting heat rapidly and uniformly from I6 may be eliminated andthe friction surfaces the friction rings of the rotor which comprise the of the brake ring may be integrally formed on braking surfaces thereof. . 10i the friction plates 8 and I0. A specific object of my invention is to design Welded to the friction plates at their outer per a novel fabricated brake rotor comprising an‘in imeters is aclosure ring I8 deñning therewith ternal chamber containing a cooling medium and with the member 2 a chamber 20 (Figure 3), having the characteristics of high thermal capac which is substantially filled with a substance hav ity and conductivity, such as, for example, metal 15 ing the characteristics of high thermal conduc lic sodium, potassium nitrate, lithium nitrate, or tivity and high thermal capacity such as, for ex sodium nitrate. ` ample, metallic sodium, or one of the other sub My novel fabricated brake rotor comprises an stances heretofore mentioned. It may be noted iron or steel cylindrical support member having a that the chamber 20 is not completely ñlled with bore at one end thereof for the reception of the the sodium, a small space being provided for ex hub of an associated wheel, said support member pansion of the latter which may be gasiñed by having openings therethrough for the reception heat developed in the friction plates 8 and I0 of means securing the rotor to the wheel. A pair during a braking operation. of spaced annular iron or steel friction plates The inner surfaces of the friction plates are are welded at their inner perimeters to the outer 25 provided with fins 22, 22 (Figure 3) which provide perimeter of the support member and define a relatively great area of contact between the therewith a chamber for the reception of a cool plates and the cooling substance within the cham ing medium such as above described, said cham ber 20, and likewise, the member 2 is provided ber being closed at its radially outer extremity by with a plurality of radial fins 24, 24 alfording re1 means of an iron or a steel closure ring recessed atively great area of contact with the cooling in the outer perimeters of the friction plates and substance. It will be understood that although welded thereto. the fins 22, 22 are herein shown as annular mem In the drawing, Figure 1 is a fragmentary side bers extending axially of the brake ring, and the elevation of my novel rotor, only one-half of the iins 24, 24 are illustrated as annular members ex same being illustrated inasmuch as it is a sym metrical annular member. Figure 2 is an edge elevation taken from the right as seen in Figure l, and Figure 3 is a frag mentary view in radial cross-section, taken in the plane indicated by the line 3-3 of Figure 1. My novel brake rotor comprises the annular support or hub member 2 preferably formed of 35 tending radially of the brake ring, the form and arrangement of these fins may be varied as de sired. . Thus it will be seen that I have designed a novel brake disc comprising an internal chamber with in which is disposed a cooling substance or me dium having high thermal conductivity and ca pacity, said substance being operable to conduct iron or steel and having at one end thereof a heat rapidly and uniformly from the friction sur bore 4 for the reception of an associated rotat ing element such as, for example, the hub of a 45 faces of the disc to the support member therefor, wheel. The member 2 is-provided with a plu rality of openings 6, 6 therethrough for the re ception of means securing the rotor to its :asso ` ciated rotating element. Mounted on the outer perimeter of the sup port member 2 is a brake ring comprising the spaced annular friction plates 8 and l0 which are preferably welded at their inner perimcters at I2, I2 (Figure 3) to the member 2, said plates havingr on their remote surfaces the annular ra said substance also being operable to absorb a considerable quantity of heat by virtue of its high thermal capacity. It is to be understood that I do not Wish to be limited by the exact embodiment of the device shown which is merely by way of illustration and not limitation as various and other forms of the device will, of course, be apparent to those skilled in the art Without departing from the spirit of 55 the invention or the scope of the claims. f , ‘i ' 2,407,197 3 I claim: 1. In a fabricated brake rotor_ a cylindrical support member h'aving radially and circumfer entially extending heat dissipating ñns integral 4 thereof providing friction surfaces and the ad jacent surfaces thereof formed to provide annu lar heat dissipating fins circumscribing the axis of said member and projecting axially thereof into said chamber, a cylindrical closure ring with the outer perimeter thereof and spaced from Welded to the outer perimeters of said plates, and the ends thereof, a, brake ring comprising spaced a quantity of a substance having the charac annular plates sleeved over said member and teristics of high thermal capacity and conduc having the inner perimeter thereof Welded to the tivity Within said chamber substantially filling outer perimeter of said member at opposite sides of said fins, said plates defining an annular 10 the same. 3. In a fabricated brake rotor, a cylindrical chamber therebetween, a cylindrical closure ring support member having radially and circumfer between said plates and recessed in the outer perimeters thereof and welded thereto, friction entially extending heat dissipating fins integral plates secured to said annular plates on the re with the outer perimeter thereof and spaced from mote sides thereof, a plurality -of heat dissipat the ends thereof, spaced annular plates sleeved ing fins integral with the other sides of said an over said member and receiving said fins therebe nular plates and projecting axially therefrom at opposite sides of said chamber into said chamber, tween, said plates having the inner perimeters thereof Welded to the outer perimeter of said member and defining an annular chamber, fric and a substance Within said chamber having the characteristics of high thermal capacity and con 20 tion plates secured to said annular plates on their remote surfaces, a plurality of annular heat dis ductivity. ' sipating fins on the adjacent faces of said annu 2. In a frabricated brake rotor, a cylindrical lar plates, said fins circumscribing the axis of said supportl member having at one end thereof a rotor and being radially superposed and project bore for connection to an associated rotating ele ment and provided with radially and circumfer 25 ing axially with respect to said member into said chamber, a cylindrical closure plate recessed in entially extending heat dissipating fins integral the outer perimeters of said annular plates and with the outer perimeter thereof and spaced from Welded thereto for closing the radially outer ex opposite ends thereof, a brake ring comprising tremity of said chamber, and a quantity of a spaced annular plates sleeved over said member and having the inner perimeters thereof Welded 30 substance having the characteristics of high thermal capacity and conductivity Within said chamber substantially filling the same. posite sides of said fins, said plates defining an to the outer circumference of said member at op annular chamber and having the remote faces RAYMOND WATTS.