Патент USA US2106541код для вставки
Jan. 25, 1938. J. TJAARDA _ 2,106,541 ENGINE MOUNTING Filed April 9, 1934 2 Sheets-Sheet l B5D°\I0O0B arcsnoINVENTOR. ATTORNEYS. Jan. 25, 1938. - . J;- TJAARDA - ENGINE f 2,106,541 MOUNTING ` Filed April 9, 19:54 ‘ 2 sheets-sheet 2'_ C QF: s . IN VEN TOR. @4a/fda, /3 ATTORNEYS. ' l 2,106,541 Patented Jan. 25, 19.38. PATENT OFFICE < UNITED STATES 2,106,541 ` ENGINE MOUNTING John Tjaarda,_ Birmingham, Mich., assignor to Briggs Manufacturing Company, Detroit, Mich., a corporation of Michigan Application April 9, 1934, Serial No. 719,656 A 11 claims. (01.180---541- ticularly adapted for mounting a power unit in 'I'he present invention relates to an engine. mounting and vehicle frame construction adapt cluding f an engine, transmission, clutch and differential in the rear of an aerodynamic stream ed particularly but not exclusively for use in lined vehicle body such as the “teardrop” type, .motor vehicle constructions wherein the engine 5 is mounted adjacent the driving wheels of such vehicle. while conserving the maximum carrying capacity in the interior of the body. An object of the present invention is to provide ` It is a further object to provide an engine ' the driving wheels, the center of gravity thereof being preferably located forwardly’of the rear mounting and vehicle frame construction in which vibrations from >the engine, road shocks, and the like, are absorbed in vibration absorbing media such as live rubber, springs, or the like, and are not substantially transmitted to the driving axle shafts. vehicle body. an engine mounting and vehicle frame construc tion particularly adapted for iiexibly mounting an engine in the rear of a motor vehicle adjacent ' ' . y ` Other objects of this invention will appear in A lfurther object is to provide an >engine mounting and vehicle frame construction in the following description and appended claims, which the rear of the body and frame. is sup-` reference being had to the accompanying draw- f ported from the engine which in turn is supported ‘ ings forming a part of this specification wherein on the rear driving wheels by spring means pref like referencefcharacters designate correspond _' _ ¿ erably effective to permit independent'I movement _ ing parts in the several views. 20. of the wheels while 'reducing to a minimum the ' Fig. 1 is a fragmentary top planview showing 0 unsprung weight of the vehicle. I the rear of a vehicle body frame in which a power , A further object is to provide an engine mount ing and vehicle frame construction in which the engine, transmission, diiferential and clutch are 25 combined as a readily installed or removable power unit which yieldingly supports a portion of the body and frame of the vehicle and in which the power unit is floatingly supported in improved manner through yieldable connections bythe driving wheels of the vehicle. . Another object is to provide an engine mount ing and vehicle frame construction in which the weight of the power unit and body is so `distributed as to eiîect an increased vtractive etil - unit is mounted in - invention. accordance with the present ` Fig. 2 is a fragmentary elevation partially in section, taken through line. 2-2 of-Fig. 1 in the direction of the arrows. _ ' i , Fig. 3 is a sectional view taken on thejlin'e 3--'-3 of Fig. 1 in the directionl of the arrows: Fig. 4 is a rear elevation showing the power Aunit mounted on the driving wheels ofthe ve-hicle. . Fig. 5 is a fragmentary section of thefront engine mounting taken on line 5_5 of Fig. 1 in the direction of the arrows. 35 ciency of the driving wheels. Fig. 6 is a. fragmentary sectional view taken A further object of the invention is to providev lon the une s-s of Fig. 1 in the direction of the . an improved structure wherein the power unit or assembly, including engine,` transmission, differential and clutch, is a separate unit spring 40 supported directly on the drivingwheels inde pendently _of the vehicle frame and which unit « in turn forms a carrier for the frame and body. As a consequence, since the chassis> frame does not, as in conventional practice,y support the> 45 power mechanism, its structure may be’ ma, terially reduced in weight and-merely requires suñicient strength to sustain the body and pas senger loads.'v ` - . i It is a further object to provide an improved 50 engine mounting and vehicle frame construction in which the driving wheels are independently mounted for free vertical movement relative to each other. y It is a further object to provide an engine 55 mounting and vehicle frame construction par Fig. 7 is a sectional view taken onlthe line Y. ‘l--T of Fig. 6_ in the direction of the arrows. Before explaining inv detail the present inven- ` tion it is to be understood that the invention is not limited in its applicationto the details of. construction and arrangement of parts illus-k trated in the accompanying drawings, since the .y invention is capable of other embodiments and j 45 of being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is >for the pur pose of description and not of limitation,'and it j is not intended to limit the invention claimedy herein beyond the requirements of the prior art. ‘ Referring to the drawings and particularly to Fig. 1, I0 designates a tubular central frame mem ber extending longitudinally of the vehicle Ibody „ and _forming a part of the body carcass. The 2,106,541 v 2 frame member Ill has forks I0a and IIlb extend between the face of the end of the lbracketf24 and ing outwardly from therear portion thereof to ‘ the face of the closing plate I9. provide a “Wishbone” type of frame in which suffi- _ The forward end of the power unit 20 is sup cient clearance is provided between the forks Illa ported on the cross brace 32 and is held in a vibra and IObfto accommodate the forward end of a tion absorbing cushioned mounting shown in de power unit 20. - As shown in Fig. 3, the tubular tail in Fig. 5. As there shown, the brace 32 is a frame member I0 is formed of two semi-circular channel member generally U-shaped in cross sec tubular members II and I2 having depending flanges I3and I4 and inwardly depending top flanges orllugs I5 and I6. A central reinforcing member or plate |1 extends lengthwise of the member I0 and is secured by welding or similar .means to the lugs I5 and I6 along its top longi tudinal edge and is secured between the iianges 15 I3 and I4 along its lower longitudinal edge as by means of rivets I8. The central member I1 is provided with a plurality .of flangedppenings I1a for the purpose of eliminating weight from the member without sacrificing structural strength -20 thereof. This construction is such that the mem tion and provided with the ñanges 33 at its ends which are 4secured as by riveting tothe plates I9 secured to the channel members II and |2 form ing the forks Illa and Illb respectively. In order to provide a brace which is light in weight without sacrificing its strength, flanged openings 35 are provided in the longitudinal sides thereof. The top longitudinal edges of the chan nel member are turned substantially at right angles to the sides thereof to form the flanges 36. A top reenforcing member 31 and a supporting member 38 are secured by rivets or the like 39 to the flanges 36. -»Secured to the reenforcing 20' bers VII and I2 and the member I1 form the main member 31 and the supporting member 38 is a unitary tubular frame member l0. y’The forks Illa bracket 40 havinga downwardly extending flange and Illb are formed from the members II and I2 respectively, the open side faces of which are 4I whichisv secured to the reenforcing member 31, the supporting 'member 38, and the ñange 36 by 25 closed by longitudinal plates I9 secured thereto means of bolts'or similar fastening means 42. in the manner shown in section in Fig. 7. A cross brace 32 is secured to the plates I9 and Extending laterally and at substantially right the forks Illa and I0b and acts as a brace for the framework while supporting the forward end of the power unit 20. ‘ At the rear end of the, forks Illa and Iûb a angles to theflange 4I on the bracket 44I) is a flange 43 which is secured to the parts 31 and 38 by means of bolts. or similar fastening means 44, which may extend through the supporting mem 30. ber and reenforcing member and have a screw frame supporting bracket 24 is provided >such~ as threaded connection with’a ñller block 45 lo-- shown in Fig. 6. The bracket 24 acts as a suspen cated inside the channel of member 38. '_I'he >supporting bracket 40 at its upper end is sion arch and is connected with a plate 22 35 adapted to rest upon the top of the casing 2| vforming a part of the power u'nit designated generally as 26. The power unit consists of an engine, clutch, transmission, and differential, all mounted on or in the unitary casing 2|. The member 22 is formed with a substantially 40 enclosed channel which is generally U-shaped in cross section and provided with upwardly extend provided 'with annular sleeve 46~has a body fitted between an annular hub 40a in which an 46 is carried. _ The annular sleeve of rubberl 41 bonded thereon and a face of the annular sleeve 46 35 and the inner corrugated face of the hub 40a. The forward end of the power unit 20 is provided 40 with an extending supporting _hollow bearing member 50. This member is tapered in its length _ ing substantially parallel side ñanges 23. A body and is secured to the power unit 20 at 5I by weld ing or rivets. The member 50 extends forwardly from the power unit and within and in engage-A ment with the tapered annular sleeve 46. An end of the supporting bearing 5I) extends laterally be yond the end of lthe annular sleeve 46 and is groove in the rubber 21 and is maintained therein _ provided with a screw-threaded portion 52 on which a nut 53 is placed. By drawing up the -nut 50 50 in such a manner that a space 3| is provided be tween the edges of the channel 25 and upper edges 53 on the member 50 the latter will be drawn rear of the flanges 23. This space 3| prevents a direct wardly sufllciently to clamp its wedge shaped ‘sur- . metal-to-metal contact between the member 22 face in binding engagement with the inner wedge -shaped surface of sleeve 46. An annular flangedv and the bracket 24 when in the assembled posi 55 tion. The bracket 24 and the member 22 are opening 50a is provided in the end of the bear 56 maintained'in their relative positions‘as by means ing member 50 and permits the insertion of a of bolts 28 which are embedded in the body of crank therethrough, when necessary, to connect rubber _ 21 «and extend upwardly therefrom with; the shaft >54 formanually starting the ' n ._ through openings provided in the channel 25. A engine. 60 body _of rubber 29 is then placed inside. the ’~ ' In Fig. 4 is shown the assembly of the power 60 of rubber 21 is placed within theÍ channel and 45 maintained between the flanges 23. The sup porting bracket 24 is formed with a channel 25 extending throughout its length.` _At the top por tion ofthe bracket 24 the channel 25 rests in a channel 25 and the bolts 28 extend through this unit _20 and the driving wheels 55 and 56. The body of rubber 29. Nuts 30 arescrew threaded Í casing l2| of the power unit 20 is secured to the ' on the bolts 28 and through intervening washers mid-portion of a transverse leaf spring assembly engaging the' rubber 29 compress the parts to- , 51I and is suspended therefrom. The lwheels 55 65 gether in cushioned relation. and 56 are mounted on brake backing plates 56 Reenforcing flanges 26 extend along each and 59, which are maintained in upright position longitudinal edge of the channel 25 and serve to through pivotal connections 60 with the ends of impart rigidity and 4strength to the support. The lower ends of the flanges 26 are secured to the 70 plates I9 by means of bolts, rivets, or the like 26a. _ The detail of this fastening is shown in Fig'. '1. As there shown- plates I|911 are welded within the the transverse spring 51 and pivotal connections - 6| with the torque arms 62 and 63. The torque arms 62 and 63 are pivotally secured to longitu 70 dinally spaced lugs 64 and 65 which depend from the bottom of the casing 2|. The Wheels 55 and frame formingmember II and are tapped to re- » 56 are driven from the differential gear mecha - ceive the `screw-threaded ends of the bolts 26a. nism through live axle shafts 66 (Fig. 2) which 25 An anti-squeak stripl | Ia is preferably interposed 'are universally >connected t0 the differential 75 3 2,106,541 mechanism and wheels in customary manner to 'ing intermediate the ends of said casing, and provide a “full floating” wheel mounting. The spring means supported directly by the driving axle shafts extend through tubular axle housing wheels of the vehicle and directly connected with sections 61 which are trunnioned at their ends said casing rearwardly of said suspension means. to permit vertical movements of the wheels. The 2. In a motor vehicle having a central longi tudinal frame bifurcated at its rear end, a 'powerl` unit, a cushion support secured to the vehicle frame adjacent the forward- end of the power unit and yieldably connected to the latter, a vi construction, therefore, is such that the wheels 55`and 56- are independently sprung and are free to move relative to each other in a vertical di rection. The torqueA arms 62 and 63, transverse 10 spring 51, and torque tubes 61 cooperate at all times to maintain the wheels 55 and 56 in proper transverse relation. bration absorbing bearing plate carried by said 10 power unit in rear of said support, a suspension member secured at its ends to the bifurcated » From the foregoing it will be seen that the power mechanism comprising the engine, differ 15 ential mechanism, transmission mechanism and clutch mechanism, preferably arranged in this order, constitutes a single unit adapted to be _ readily installed or removed as such. ends of the vehicle frame and secured to and . yieldingly supported by 'said bearing plate at a point intermediate said ends, a transverse leafspring „having its ends supported directly by the driving wheels of the vehicle andl having the The frame is bifurcated at its rear end to embrace or 20 straddle the forward end of the power unit and is hung thereon. Preferably the power unit has its center of gravity slightly- in advance of the` bracket 24. The center of gravity of the power unit 20 will thus be located in advance of the ~ 25 spring 51 andthe transverse wheell axis. This construction has the advantage of insuring proper traction at all times and better stability. Inas much as rapid- acceleration sets up forces tending to lift the forward end of the power unit-and de 30 press the rear end whereby full traction would _midsection thereof secured to said power unit to suspend said unit therefrom, the weight of the power unit and -connected portions of the 20 , vehicle frame being so distributed that `the center of gravity thereof is located at a point forward of said spring. L 3. In a motor vehicle’having a frame and rear driving wheels, a power unit, a cushion 25 support secured to the frame adjacent the for ward end of the power unit and comprising a bracket providing'an annular ring having its axis on a line extending substantially axially of the power unit, a' body of compressible rubber, 30 ordinarily be lost, the present» arrangement of ~ within >said ring, a forwardly projecting bear the engine is desirable in order to counteract these forces. . ` > ing member secured to said power unit and ex ,ftending into and engaging said body of rubber, a vibration absorbing bearing plate carried by y It is important to note that the forward con nection at 40a between the power unit and frame said power unit in rear of/ said support, a sus lies on the longitudinal axis of the engine crank pension member secured at »its ends to the ve shaft, and that the arched supporting connec hicle frame and secured to and vyieldingly sup tion 22-24 has a curvature whose center lies,` ported by said bearing plate at a point inter substantially at the axis of the crankshaft. Since ` mediate said ends, a transverse leaf spring hav these connections between the power unit are ing its ends supported directly by the driving 40 made through rubber it will be seen that the> wheels and having the mid-section thereof se oscillatory or vibratory movement of the power _cured to said power unit to suspend said unit unit about the axis of the crankshaft will be y therefrom, the weight of the power unit and readily absorbed and will not be transmitted in connected portions of the vehicle frame being 45 any substantial extent to the yframe and body, so distributed that the center of gravity thereof is located at a point forward of the transverse the torque reaction being largely taken up by the spring 51. It will also be observed that the center of gravity of the engine or power yunit mass ' is materially belowá the point of suspension of 50 the unit from the spring 51 which point is sub stantially on a line normal to the crankshaft ~axis. By virtue of this construction, when the car is travelling in a curvilinear path, the engine mass, due to its pendulum effect, tends tobecome 55 displaced in the direction of the outside of the curve. The eñ’ect of this is to exert forces through the spring leavesl effective to‘produce angular or banking movement of the wheels. Due, therefore, to the arrangement and manner 60 of supporting the engine on the wheels, ‘cen-` trifugal forces vset up when the car goes into a curve are eifectually counterbalanced by aug mented centripetal forces, thereby. giving the car increased stability on cuî‘ves. ' 65 axis of the driving‘wheels. K 4. In a motor vehicle having a frame and rear driving wheels, a power unit extending between said wheels and supported thereon, a yoke-like 50 suspension member having the ends -thereof se cured to the frame and having its mid-section arched to embrace said lpower unit and suspend said frame from the power unit, and separate means spaced from said suspension member for 55 mounting the frame on said power unit. ' 5., A motor vehicle comprising a frame and wheels, a" power unit including an engine having> a , horizontal crank shaft extending iongitudinally of the vehicle, spring means connected to the 60 wheels and connected centrally to the power unitv for suspending the power unit therefrom, and lon' gitudinally spaced supporting connections be tween the frame and engine, each connection - being centered on the crank shaft axis, one thereof 1. A motor vehicle having a frame and a pro pulsion unit adjacent the rear >end thereof, said propulsion unit supporting the- rear portion -of’ said frame and comprising a-unitary casing con 70 taining an engine and transmission mechanism, said casing having a forwardly extending bear ing, a resilient engine mounting secured to the vehicle frame adjacent the forward end of said casing and adapted to receive said bearing, sus pension means connecting the frame and cas lying above said axis and the other substantially on "said axis. ‘ 6. A mounting for a rear engine in a motor vehicle, including a frame having a tubular cen-V ter member terminating in a bifurcated end por tion having outwardly extending portionsl form ing an engine cradle', a floating connection se cured to the frame at a point adjacent the for ward end of an engine'mounted therein, a sus pension member having its -ends secured tothe 70 .4 2,106,541 bifurcateci frame portion and extending above such cradle and overlying the engine, a yielding and located in rear of said center of gravity, and , connection between the engine and the suspension through the medium of said unit. said frame being resiliently connected to said unit at spaced points member, and a transverse leaf spring carried by the driving Wheels and overlying .and secured to the engine. 7. A weight distributing mounting for a rear engine in a motor vehicle adapted to increase a chassis frame supported on said wheels only located in rear of the center of gravity of the unit and in advance thereof. 10. In a motor vehicle having a frame and rear driving wheels, a propulsion unit disposed _ intermediate the- driving wheels and having its center of gravity at a point forward of the trans 10 verse axis of said wheels, said propulsion unit with the rear end of the vehicle frame, a cush ioning connection between the frame and engine comprising engine, clutch, transmission and dif at a pointadjacent the forward end of the engine, ferential mechanism and a unitary casing for and a suspension member having its ends secured - housing the same, said unit having a forwardly 15 adjacent the ends of the engine cradle portion. extending bearing, a resilient engine mounting 15 ' and extending upwardly thereof to overlie the secured to the vehicle frame adjacent the for engine, a yielding connection between the engine ' ward end of said _propulsion unit and adapted to the tractive eiiiciency of the driving wheels and 10 comprising an engine cradle formed integrally and the suspension member, and a transverse receive the said bearing, a bracket mounted on said casing intermediate its ends and connected to the rear portion of said frame for supporting 20 8. In a motor vehicle having rear driving the frame, and spring means connected to the wheels, a power unit, a central longitudinal frame . driving wheels of the vehicle and- directly con member bifurcated at its rear end to embrace said nected'with said propulsion unit. 11. In a motor vehicle having a frame and rear unit and terminating short of the transverse driving wheels, a propulsion unit disposed inter 25 wheel axis, said member being resiliently con nected to- and suspended from the power unit at mediate the driving wheels and having-its center a point in rear of its center of gravity,*said frame of gravity at a point forward ofthe transverse also having a resilient point of connection with axis of said wheels, said propulsion unit compris said unit in advance of the center of gravity, and ing engine, clutch, transmission and ldifferential 30 spring means in rear of such point of suspension mechanism and a unitary casing for housing the 30 for supporting the power unit and frame member same,- said unit having a forwardly extending on the wheels, 'said spring means comprising a bearing, a resilient engine mounting secured to transverse leaf spring located in rear' of the center the vehicle frame adjacent the forward end of said propulsion unit and adapted to receive the of ,gravity of said unit. , leaf spring carried by the driving wheels and 20 overlying and secured to the engine. £3 Cil 9. In a -motor vehicle having rear driving wheels, a propulsion unit adjacent the rear end of the vehicle and disposed intermediate the driv -ing wheels thereof, said`unit having its center of gravity at a point forward of the transverse axis 40 of said driving wheels, a transverse leaf spring for supporting said unit on the driving Wheels said bearing, a bracket mounted on said casing 35 intermediate its ends and connected to the rear portion of said frame for supporting the frame; and spring means connected to the driving wheels of the vehicle and directly connected with said propulsion unit in 'rear of said center of gravity. 40 JOHN TJAARDA.