Патент USA US2409758код для вставки
Patented Oct. 22, 1946 2,409,757 UNITED STATES PATENT OFFICE CLUTCH Frank L. Hetzel, Hermosa Beach», and Volñey E. Carstedt, Los Angeles, Calif. Application June 24, 1944, Serial No. 541,88‘6 3 Claims. (o1. 19a-105) l 2 gag'ement with the `friction ring and the actu ating spring >expe'inded into engagement with This invention relates to clutches and more particularly to a clutch of the centrifugal type. The general object of the invention is to pro vide _an improved centrifugal clutch, which is said ring, which positions of said springs are assumed when said clutch member is rotated' simple in construction,«_efûcient in operation, easy above a predetermined speed and the clutch is in to repair and inexpensive te manufacture. its power drive position. A more particular object is to provide an im _ ì ` _ Fig. 9 is 'a view like Fig. T of ,the modification of our clutch shown in Fig. 6; with the actuating proved centrifugal clutch with means, actuated by centrifugal force, for causing the clutch inem spring contracted out of engagement with the bers to be interen'gaged, when one of the clutch 10 friction ring and the auxiliaryspring expanded members is rotated above a predetermined speed. out of engagement 'with' said ring, when one o_f A further object is to provide a centrifugal the clutch members is rotated vby the power shaft clutch with means for causing the clutch mem bers to be interengaged during rotation of one of said members up to a predetermined speed, at a predetermined speed, and the clutch as idling with its other member stationary and said power shaft and including means actuated by centrifugal force, for causing the clutch members to be interengaged when one of the clutch members is rotated above said predetermined speed. Other objects and advantages will appear here turning ltherein. u v ' I ì l A Fig. 10 is a Afragamentary section taken on line 2'--2 of Fig; ôilliistrating` novel means for pre venting ovne of the clutch members from sliding «ma Shaft.` . „ . , , . Referring more particularly to the drawings in which corresponding parts are designated by the inafter as this specification progresses. rl‘he invention is illustrated in the annexed drawings, which form a part of this specifica saine reference characters in all of the views our clutch includes primarily a~ pair of clutch mem bers I and _2, va _fiat clutchvring 3 and an actuat ing coil spring 4 arranged in ring formation. tion, and in which: Fig. 1 is an inner side view of one of the clutch members, with the friction ring removed from said member, and the actuating spring con tracted to its inoperative position. The clutch member I A is of circular dish formation, open at its forward side and Vformed with a hub 5, 'a side wall 6; a cylindrical periph Fig. 2 is a longitudinal section of the clutch taken on line 2_2 of Fig. 5, with the clutch mem eral wall ‘I extending rforwardly from said side wall, and enlarged hub portion ß formed also bers disengaged and the clutch in its inoperative integral with said side wall 6 andV extending forwardly therefrom tona'point within the> for ward annular edge of> said cylindrical peripheral _ position. Fig. 3 is a view like Fig. 1, except that the actuating spring of the clutch is shown in its wall 1. A’plurality of pins~ 9, >preferably three, are secured in the enlarged hub ,portion 8 equi expanded and operative position. distant apart Yand project forwardly therefrom, Fig. 4 is a view like Fig. 2, except that the clutch members are shown engaged with the clutch in its operative position. Fig. 5 is a side View of the clutch. Fig. Gris a cross section taken on line 6-6 of 40 Fig. 7, of one of the clutch members of a modi fication of our invention, with the friction ring removed from said member and with the main slidably thröügh a correspondingl number of apen-ings IU, respectively, in the clutch ring 3, near the' inner edge of said ring, whereby said ring is detachably mounted in operative position in the forward side of the clutch member I. An annular' friction cluteh- shoe II of suitable mate rial is secured tó the forward side of the clutch actuating spring contracted to its inoperative e, for engaging clutch member 2 Vas will position and the auxiliary spring contracted into 45 be hereinafter more 'f'ull‘yudescribed In the its operative position, which positions of said córner between the _side` wall 6- and the Cylindri springs, are assumed when either clutch mem cal peripheral wall -I` _is formed _an annularâcam ber is rotated below a predetermined speed and _I2 to be engaged by theactuating coil spring 4 the clutch is in its starting drive position. in the and for thepurpos'e hereinafter Fig. '7 is a longitudinal section of the modifi 50 dèäê?íbëdl The` 4' is DÖS-îtîòne‘d Within the Clutch ñ‘ièlnbë? I aròund 'the' periphéi‘y I3 cation of our clutch, as illustrated in Fig. 6, taken on line 'I-'I of Fig. 6. of the enlarged hub’p'ort'iòn'- 8' òf said- clutch mem ber between the side‘ wall 6` óf said clutch> mein Fig. 8> is a view like Fig. ’7 of the modification of our clutch show'n in Fig. 6, with the auxiliary b‘er and the clutch ring 3`, with' the' ends of said spring expanded by centrifugal force out of en 55 spring c’on'ne'cted together by intereng‘aging ` 2,409,757 3 4 hooks I4 and I5 formed onthe ends, respectively, of said spring; the spring being of such length mitted by the clutch, through its pulley I8 and a ` that with its ends connected together it is con tracted around and against the periphery I3 of the enlarged hub portion 8 underrproper tension in its ineffective position when the clutch mem ber l is at rest, as illustrated in Figs. 1 and2`, for the purpose hereinafter described. The clutch member 2 comprises a disc I6 with a hub >Il extendingv outwardly therefrom in which hub is formed a grooved pulley I8 to receive a belt through which power may be transmitted by the clutch. The clutch member I is keyed on a drive shaft> l I5 by a key 2.3„ whileV ther clutch member 2_is turnably mounted on said shaftV and- is main tained in its operative position on said shaft, belt extending around said pulley, to any suitable mechanism for driving said mechanism. In the modification of our invention shown in Figs. 6 to 9 inclusive the construction is sub stantially the same as that shown in Figs. 1 to 5 inclusive, with the addition of an auxiliary coil spring 26 of smaller diameter kthan the diameter of the actuating springV 4, arrangedin ring for mation of greater diameter thantheidiameter of the ring formation of said actuating spring 4 and surrounding said actuating spring, in its ring y . formation, in the clutch member I, there being an annular groove ‘2l in the inner side of the peripheral wallî of said clutch member I at the outer end of the annular cam I2, into which rgroove said auxiliary spring 26 is expanded by centrifugal force when said clutch member I is with its disc I6 adjacent the forward end of the hub 5 and the forward edge of the CylindricalY » rotated above a predetermined speed. When the clutch member 2> is roated at any peripheral wall l of the clutch member I, by a -, speed up to a predetermined speed, the auxiliary 4collar 2l secured on said shaft I9, by a set screw spring 26 is contracted, so that it engages the adjacent the forward fend of the hub I'I-of actuating spring 4 and the fiat clutch ring 3 said clutch member 2, the shaftv I9 extending (Figs. 6 and 7) and presses said ring and its shoe through and being operatively ñtted in the bores AI I outwardly until said shoe engages the disc IB of the hubs 5 and I1 of the clutch members I and of the clutch member 2 with suiiicient friction to 2, respectively, with the key 20 secured in the cause the clutch mem-ber I and shaft I9 to be shaft IS and fitted in a groove 23 in the hub 5 rotated slowly by the clutch member 2 at a speed of the clutch member I. below said predetermined speed. Above said pre ' The clutch member I is secured on the shaft lil against sliding on its key 20, by means of a RO determined speed said auxiliary spring 26 is ex panded outwardly in its ring formation by cen set screw 24, threaded in the hub 5 of said clutch member and extending through said hub and trifugal force, into the annular groove 21 in the through a longitudinal groove 25 in the bore of peripheral wall 'l of‘ the clutch member I, (Fig. 9) vsaid hub, into engagement with said shaft. The and the actuating spring 4 is expanded out width of the groove 25 is greater than the wardly in its ring formation by centrifugal Aforce diameter of the set screw 24, so that the end of and is directed forwardly by its engagement with said screw when tightened against the shaft I9 the cam l2 into engagement with the clutch mayy upset the surface of said shaft around said ring 3 (Fig. 8) and said ring and its shoe II are screw end in said groove, which prevents sliding thereby forced forwardly until said shoe engages of the end of said screw on said shaft, and thus 40 the disc I6 of the clutch member 2 with sufficient locks the clutch member I on said shaft against friction to cause the clutch member I to rotate >sliding on said shaft over the key 2D. Upon the clutch member 2, so that the power of the 4loosening said set screw 24 and withdrawing its shaft i9 may be transmitted by the clutch endfrom the upset portion of the shaft I9 the through the pulley I8 on the clutch member 2 clutch ymember I may be withdrawn from said 45 as aforesaid, above said predetermined speed. shaft',l the key 2i) passing through the key groove ’ We claim: 23 in the hub 5 of said clutch member and the l. A. clutch as disclosed comprising a clutch upset portion of the shaft I9 passing through the member to be secured on a rotatable shaft, a groove 25. » second clutch member to be turnably mounted The operation of the invention is as follows: on said shaft, a clutch ring mounted to move When the shaft I9 and the clutch member I, laterally in said first clutch member, an actuat are at rest the actuating spring 4 is contracted by ing coil spring in said first clutch memberl ar its tension around and into engagement with the ranged in ring formation and to be expanded periphery I3 of the enlarged hub portion 8 and by centrifugal force upon rotation of said first into engagement with the side wall 6 of said 55 clutch member above a predetermined speed, clutch member, releasing the forward pressure and a cam in said first clutch member to be of the spring against the clutch ring 3, whereby engaged by said spring when expanded to cause said clutch ring and its shoe II are allowed to said spring to engage and move said clutch ring move away from the disc I6 of the clutch member forwardly into frictional contact with said second 2, releasing said shoe from said disc, said move 60 clutch member to clutch said second clutch ment of said ring being permitted by the pins 9 member to said first clutch member, an auxiliary sliding in the openings I!) in said ring, as illus spring in ‘said ñrst clutch member arranged in trated in Figs. l and 2 of the drawings. ring formation surrounding said actuating spring Rotation of the drive shaft I9 rotates the clutch in its ring formation and constructed and ar member l, and, at a predetermined speed of 65 ranged to be contracted between said actuating rotation of said clutch member, the contracted spring and said clutch ring to force said clutch actuating spring 4 is expanded outwardly by ring into frictional contact with said` second centrifugal force and is directed forwardly by its clutch member to clutch said clutch members engagement with the cam I2, into engagement together, ~when said second clutch member is with the clutch ring 3, whereby said ring is moved -70 rotated below said predetermined speed, and forwardly, sliding on the pins 9 until thering said auxiliary spring being constructed and ar shoe II, engages the disc I6 of the clutch mem ranged to be expanded by centrifugal force out ber 2 with sufficient friction to cause the clutch 'of effective frictional Contact with said clutch member > I to rotate the clutch member 2 so `ring when either of `said clutch members is ' «that the power of the shaft I!! may be trans 75 rotated'above said predetermined speed. 2,409,757 5 2. A clutch as claimed in claim 1 in which the first clutch member is formed with an annular groove into which the auxiliary spring is ex panded When either clutch member is rotated above a predetermined speed. 3. A clutch as disclosed comprising a first clutch member to be secured on a rotatable shaft, a second clutch member turnably mounted on said shaft, means for clutching said clutch mem bers together when either of said clutch members is rotated below a predetermined speed, and means for automatically clutching said clutch members together when either of said clutch members is rotated above a predetermined speed and said ñrst clutching means is disengaged and thereby rendered inelîective. FRANK L. I-IETZEL. VOLNEY E. CARSTEDT.