Патент USA US2105317код для вставки
Jan. 1.1, 1938. ' F, C, FRANK ' 2,105,317 WHEEL - Filed Nov. 19, -1954 mull~ l INVEN TOR. M ÓÍ, ./éax ATTORNEY Patented Jan. 11, -1938 2,105,317 UNITED STATES PATENT oFFlcE Frederick C. Frank, South Bend, Ind.,-assignor to Bendix lProducts Corporation, South Bend, Ind., a corporation of Indiana Application November 19, 1934, Serial No. 753,593 4 Claims. This invention relates to wheels, and more par ticularly to wheels for use in connection with aircraft. _ The wheels of aircraft are frequently subjected 5 during normal operation to severe overloads, when the aircraft contacts the ground. " It iS therefore necessary that the wheels be ‘very strong and incorporate a high factor of safety to avoid serious damage to the aircraft, certain 0 to result from the collapse of a wheel. It is also necessary that `the Weight of each unit incor porated into an aircraft be kept to a minimum lto insure the greatest efficiency and the maxi mum performance of the aircraft. 15 An object of this invention is toïprovide an extremely strong, yet light-weight, wheel adapt ed especially for use in aircraft. A further object is to provide a wheel which may be forged orcast of a very light,_yet strong, 20 alloy. - ' ' Another object is to provide‘a wheel, especially adapted for use in aircraft, which may be cast in twov sections to be fixed together to form the Wheel. 25 30 35 ’ Still another object is to provide a two-piece airplane wheel having no extremely thin sections and of a‘structure such that it maybe cast of a light, but very strong, alloy, such as an aluminum (Cl. 301-6) so that eachsection may be cast in a compara- y tively simple mold. ’ ~ Each of the complementary main sections is provided-with a flanged member I4 and l5 re spectively to engage `the sides of a tire (not 5 shown) and hold it in place on the laterally ex tending rim. members I6 and I'l of the wheel. As illustrated, the wheel is preferably of the drop center type to facilitate removal and replacement of the tire, and to provide a large air space with- 10 in the tire without unduly _increasing the over all dimensions of the tire. ' Each of the complementary sections I0 and I2 is provided with a hub portion I8 and 20 respec tively, having raceways 22 and 2.4 respectively to 15 receive anti-friction members, carried by an axle l(not shown) to transmit force from the airplane to the ground. Means are provided to secure the hub portions I8 and 20 together. The outer diameter of a 20 portion of the hub member I8 is decreased to form a tongue 26 adapted to slide Within and be engaged by a section of increased internal diam eter or projection 28 carried by the hub member 20. . The'inner surface of the hub portion 20, 25 adjacent the projection 28, is provided with A stm further Objectis to provide an airp1ane Wheel designed to be cast in two sections -to be threads 30 to receive a sleeve 32 slidable through the hub portion I8 and provided with a section of enlarged outer diameter or abutment 34 to engage a section of decreased internal diameter 30 or shoulder 36 _carried by the hub portion I8 to Yet another object of the invention is to pro vide a cast airplane wheel having enclosed brake drums and Ventilating means to dissipate heat such as pins 38 projecting through the abutment 35 34 and intothe shoulder 36. The hub portions I8 and 20 are thus securely locked together. magnesium alloy. fixed together by screw threads, and in which ' securely clamp the hub portions I8 and 20 to gether. The sleeve 32 may be ñxed against'ro novel means are provided to prevent the two sec tation relative to the hub portion I8 by means tions from separating. ‘ ' _ I ' ` ' from the drums. Other objects and advantages of the invention 40 will be apparent from the following detailed de scription, together with the accompanying draw ing, submitted Afor purposes of illustration only and not intended to deñne the scope of the in 45 vention, reference being had for that purpose to the subjoined claims. In the drawing: Figure 1 is a vertical section through an air The hub portions I8 and 2li are joined to the ' laterally extending 'rim members I6 and I1 by radially extending discs 40 and 42 respectively. 40 The discs 40 and 42 are provided with a plurality of apertures or cut-out sections 44 and 46 to de crease the weight of the wheel structure. The discs 40 and 42 are further provided with later ally extending reinforcing ñns 48 and 50 inter~ 45 mediate the cut-out sections 44 and 46 respec tively to increase the strength of the wheel lat erally as well as radially. Each of the, complementary sections Ill and. I2 is provided with `cooperating laterally extending 50 Figure 2 is a fragmentary view showing a annular portions 52 and 54. The portion 52 is plane wheel embodying the present invention; 50 and ' i modiñed form of the invention. . provided on the inside with screw threads 56 to_ As shown in the drawing, the wheel is formedl cooperate with the screw threads formed in a 4 in two complementary main sections I0 and I2. » projection 58 carried by the portion 54. 55 Both sections are to facilitate casting, ì. The screw threadsrlxing the members I2 and 55 2 2,105,317 54 together are preferably right-hand threads of 1. A drop-center airplane wheel comprising a pitch diii'erent from and not divisible into or a multiple of the pitch of the screw threads iixing two main cast sections, a hub portion carried by each section, _screw threads formed in a por the sleeve 32 to the hub portion 20, which is pref tion of one of said hub sections,- locking means including a threaded sleeve having an abutment erably a left-hand thread. ` ' The section I0 of the wheel is provided with an enclosed brake drum 60 having radially extend ing cooling flanges 624 to dissipate heat from vthe drum 60. The drum 60 is provided with a radial .10 inwardly extending ñange 64 to permit the drum slidable through a portion of the other of said hub sections and engaging the'threads in said hub section, and means including a pin to lock the sleeve against rotation, relative to said other 60 to be clamped by means of bolts 68 to bosses 2. A wheel comprising two main cast sections having hub' portions and rim portions, the latter 66 formed on the ñns 48. hub section. ` ‘ 'I'he drum 60 is provided ywith >a radially ex t tending flange 10 to coact with the rim member 15 I6 to aid in supporting the drum 60.« The flangev 10 is provided with apertures 12 to permit air to ' iiow through the space between the drum 60 and the rim section I6. Air is thus permitted to cir culate around the brake drum 60 and through 20 the cut-out sections 44 to dissipate heat from the brake drum 60. ` ' ~ y 10 ' having a screw threaded connection, screw threads formed in a portion of one of said hub“ sections, locking means _including a threaded 15 sleeve having an abutment slidable through a portion of the other of said hub sections and engaging the threads in said hub section, means including a pin to lock the sleeve against rota tion relative to the other of said hub sections, 20 said hub and sleeve threads being of a pitch dif ferent from and not divisible into or a multiple _of Figure 2 shows yan alternative construction wherein dual brakes may be employed if the ef - the -pitch of the screw threads carried by said fective braking area of the-single brake idrum 60 of Figure 1 is vinsuiiîicient to adequately handle the load imposed upon it. The section I2 of the wheel maybe iitted with a brake drum |60., sim ilar to the brake drum 60 carried by the section I0. The drum |60 is provided with a plurality rim portions. p ‘ , 3. A drop-center airplane wheel lcomprising two separate main sections, hub and rim portions carried by each main section,y a screw thread carried by one of 4said hub portions, a tire en gaging ña'nge carried by each section, means to of outwardly extending cooling ñanges |62, and fix the two main sections together, said means an inwardly extending flange |64 to permit the * including cooperating screw threads- carried by 'drum |60 to be clamped by means of the bolts each main section remote from said flanges and |68 to the bosses |66’ _formed on the i’ins- |48. a sleeve threaded into said one of said `hub por-V The drum |60 is further provided with a. ra tions at the midsection of the wheel and engag# ing the other of said hub portions, and means dially extending flange |10'to coact with the rim member ||`| to aid in supporting the drum |60. The flange |10 is formed with a plurality of aper tures |12 to permit air to flow through the space between-the drum |60 and the rim section ||1. 40 The brake drum |60 is _thus cooled by the cir culation of air through the cut-out sections |46 and over the cooling flanges |62 of the drum |60. The invention thus comprehends the provision of an airplane wheel so designed and constructed f’ that it may be cast or forged in two main sec tions, of an extremely light, but very strong, alloy, such as an aluminum vmagnesium alloy. Novel means is also provided for fixing the t'wo main sections of the Wheel together. Whilethe invention has been described with particular reference to a 'preferred embodiment, it is- not intended to limit the'scope of the inven Y, to lock said sleeve against rotation with respect ' to said one of. said portions, said'screw threads being of a diñ'erent pitch. 4. A drop center airplane wheel comprising 40 two separate main sections, hub and rim por tions carried by each main section, a screw thread carried by one of said hub portions, a tire en- ' gaging iiange carried by each section, means to iix the main sections together, said means in cluding cooperating screw threads carried by each main section remote from said iianges, and avsleeve threaded into said one of said hub por tions at the mid 'section of the wheel and en gaging the other of said hub portions, and means 50 to lock said sleeve against rotation with respect to said one of said portions, said screw threads tion to the embodiment illustrated, nor other- - being oppositely turned. _ ' wise than by the terms of the subjoined claims. 5 . I claim: 45 FREDERICK C. FRANK.