US2379545A - Cam assembly - Google Patents

Description

July 3, "1945.

F. G. SILVA ET AL CAM ASSEMBLY Original Filed March 51, 1941 Patented July3,19%15 I UNITED STATES PATENT OFFICE..

CAM ASSEMBLY Frederick G. Silva, Rochester, and William S. Davenport, deceased, late of Rochester, N. Y., by Edith E. Davenport, executrix, Rochester, N. Y., assignors to Davenport Machine Tool 00., Inc., Rochester,.N.-Y., a corporation of New York p t 1 Original applicationMarch'31, 1941, Serial No.

386,130. Divided and this application November 22., 1943, Serial No. 511,300

1 1% Claims. (CL 74-568) This invention relates to cam assemblies for longitudinally extending key slot l-9, for the reproducing successive movements of 'one or more ception of a key20 for fixing on the shaft aiworm parts of automatic forming machines, such, for. Wheel 2| driven by an intermeshing worm gear example, as those employed on the lead and cross 22 on a shaft 23, which latter parts form the slide cam shafts of automatic turret lathes and 5 means for rotating or driving the cam assembly. the like, one object of the invention being to 'The outerend of the sleeve'section ll of'the provide an improved assembly of the above'charv shaftis threaded, as at 24, for the reception of acter having a construction capable of being reada nut 2 5 for locking gear 2| in position. ily and conveniently assembled and disassembled, A sleeve for supportin the Cams is I t for including therein any desired selection of cams 26, loosely mounted on the shaft section ILjand and for adjusting the angular position of any one formed with a longitudinally extending slct 27 or more of the cams relative to the other cams for the reception of a key 28 which is rigidly held of the a s ya in its slot in the cam supporting sleeve 26, as by Another object is to provide a device of the means of rivets 29. One end of the cam sleeve is character described in which the individual cams preferably flanged, as at 30, and provided with a may be readily secured in any desired angular respanner wrench opening 3!. The other end of lation to one another to vary the time of operath sleeve is preferably threaded, as at 32, for tion thereof with any desired degree of precision. the reception of a nut 33. The cams are mounted To these and other ends the invention resides n sleeve 26, as'hereaftel described, and wedg in certain improvements and combinations of in adjusted position thereon between flange 30 parts, all as will be hereinafter more fully deat one end of the cam supporting sleeve 26 and scribed, the novel features being pointed out in the nut 33 at the other end of the sleeve.

the. claims at the end of the specification. Shaft section II is loosely inserted through'and In t e d n carried at one end by a trunnion member or 1 s a longitudinal, sectional view of a cam'-' sleeve 34 having'a flanged part 35. Sleeve 34 is assembly embodying the present invention; rotatably carried in a roller bearingassembly, Fig.-2 is a reduced side elevation of the cam indicated generally at 36, as mounted in a staand m s ee e a s b y d tac ed; tionary machine frame part 31. A washer as is Fi 3 is a fragmentary end elevation of parts preferablyinterposed between the head l4 of the shown in Fig. 2, as viewed from the right hand 80 shaft and the rotary race 39 of the bearing, to end thereof, and position the parts as shown. Flange 35 0f the i a P p e w Of One of the Collars sleeve is preferably provided, at diametrically showninFigs. land 2, detached. opposite oints, with rectangular notches 40,

The invention is embodiedin the present inwhich are detachably engaged by projecting Stance, y W y ofillustration, in a cam a s m-" 3 clutch lugs or teeth 4'! on'the enlarged flanged b pa t u a y pte for e e, for 1188011, end 42 of a collar 43, the other'end of which is the lead and cam shafts of an automatic forming smoothly tapered and e d, as t 44, c r machine, this application being a division of our 42 issndably keyed on on of sleeve 2 for .copendins parent application, Serial 386.130., 4 a "purpose to be presently described. Flange 30 Automatic forming machine, filed March 31, 1941. a the opposite end of sleeve 2 is provided t Referring more particularly to the drawing, a similar diametrically arranged teeth 45, for enlead cam shaft is indicated generally at it, comm; t notches 4 respectively, in th prising at one end a shaft section II and, at its ng 5 of t sleeve member or section l f other end, a sleeve-like trunnion member or seeth ghaft I I tion [2. The shaft section II is generally cylinaw sleeve 't 2 of the haft which may be drical, having at one end a threaded portion I3 described trunnion Sleeve forthgopposite of r u diameter, and at its other end, ahead end of the shaft section II, is carried in a pair M. The S eevei e Section l2 has a flange of rotating races 41 and 48 of a bearing assembly,

a d a t a o 1 6 w ic i r d c d in di indicated generally at 49, which is supported in a ter, at the end opposite the flange, as at H, and 5o stationary frame part 50 located in spaced relaformed with a threaded portion I8 for ensagetion with the frame part 31. It will be apparent ment with the reduced threaded end 13 of the from the above description that shaft section l2 shaft section l|,'as shown. has'a, driving connection with one-end of cam The outer circumference of the sleeve-like secsleeve ,26, the other end of which has a driving tion 12 of..the shaft is preferably formedwithaw connection, through toothed clutch parts and for that purpose with a from end to end, as shown, and is located between a pair of adjacent cam disks 53, having its reduced end received in a smoothly tapered rnounting bore 54 of one cam of the pair, and its opposite end in laterally abutting engagement, as at 55, with the opposite cam of the pair. Collar 43 has a similar tapered end 44 receivedin a tapered bore in the adjacent end cam, so that each'ca n is mounted on one of the tapered collars.

It will be seen from the above description that after loosely assembling a selected plurality .of cams .53 on the intermediate tapered collars on sleeve .25, each cam maybe rotarily adjusted to any desired angle of rotation relative to the other cams and sleeve, and that by tightening nut 33, the collars and cams may then be moved longitudinally and pressed between the nut and the opposite end flange 30, so as to detachably lock and wedge each cam against rotation relative to the cam sleeve 26.

Since the contacting tapered surfaces between each cam and its collar are smooth surfaces, without lugs, teeth, or other projections requiring registration in predetermined relative positions,

each cam may be freely adjusted on its collar to any desired angle of rotation with any desired degree of precision. It will also be seen that by unscrewing and withdrawing shaft section H, the assembly, comprising the cam sleeve 26 and its cams and'collars, may be demounted as a unit, by sliding the lugs and 45 out of the corresponding notches 40 and 46 in the bearing sleeves. The assembly, when thus detached, as shown in Fig. 2, ismade readily accessible for adjusting or replacing any one or more of the cams.

After selecting the cams suitable for the particular work to be accomplished, the cams and collars are loosely assembled in the sleeve 26 which is placed in any known or suitable jig, or fixture, comprising a fixed part and a rotatable part, one of which is provided with graduations and the other with an index. The sleeve is located with its lugs 45 in predetermined relation to the fixed part, and the rotating part and graduations of the fixtureare employed to locate the high .point of each cam in desired angular relation with the sleeve, as well understood in the art. When properly adjusted, nut 33 is tightened and the cams are thus wedged and locked in place.

When thus locked together, the assembly is inserted in line between the trunnion sleeves l2 and 34, with the projections or teeth 4| and -45 registering with the notches 40 and 46, respectively, these projections and notches beingpreferably offset so that the assembly cannot be. improperly inserted. The shaft section ll is then inserted through sleeve 34 and sleeve 2-6 and threaded into its sleeve section l2.

It is apparent that, by meansof the above described construction, the assembly may be detached .at any time and any one or more of the cams may be readily and conveniently adjusted or replaced by a .difierent cam or cams, de-

ire hi Pro is n s e r hsady u eful, for ex m le, W eneve it is di covered. in the use of key slot 52, as shown in Fig. 4. Each of collars 5| is tapered in diameter.

disclosed by detailed reference to the parts of a preferred embodiment; it will be understood that such disclosure is intended by way of illustration, rather than by way of limitation, as it is contemplated that various changes in the construction and arrangement of the parts will occur to those skilled mime art within the spirit of the invention and the scope of the appended claims.

We claim:

l. ,A cam assembly comprising a support, a plurality of cams adjustably mounted on saidlsupport, a rotatable member, a rotary shaft .detaohably secured to said member and on which said support is detachably mounted, said shaft being detachable from said member and said support from said shaft for adjusting said cams on said support, spaced bearings for said member and shaft, means for rotating said member, and driving connections from said member to said support and shaft for rotatingsaid shafhsupport and m 2. A cam assembly comprisinga-supporta plurality of cams adjustably mounted on saidsupport, a pair of spaced members, a rotary shaft detachably secured at its opposite ends in said members and on which said support is detachably mounted between said members, rendered operative by detachment of said support for locking and unlocking said cams for adjustr'nen'tthereon, means for rotating one of said members, and a detachable driving connection between said rotated member and said support said shaft for rotating said shaft, support andvcams.

3. A cam assembly comprising a supporting sleevehaving a flanged end anda threaded end, a

nut on said threaded end, a plurality of cams adjustably mounted and locked :on said sleeve as a unit between said flanged end .and'nut thereof,

.a rotatable member, a rotaryshaftdetachably secured to said member and on which said support is detachably mounted, means for rotating said member and driving connections fromsaid memher to .said support .for rotating said shaft, support and cams.

4. A cam assembly comprising a supporting sleeve having a flanged end and a threaded end, a nut on said threaded end, a pluralityof cams .adjustably mounted and locked on said support :as a unit between said flanged end and nut thereof, a pair of spaced rotary members, a rotary shaft detachably secured at itsopposite ends insaid members and on which said support is detachably mounted between said members, means for rotating one of :said members, and adetachable driving connection between said rotary memher and said support and shaft for rotating said shaft, support and cams. i

5. A cam assembly comprising a sleeve, a plurality of cams on said sleeve, a pair of spaced bearing members, .a shaft carried at its opposite ends in said members and provided with means for detachably securing the :same therein," said sleeve being detachably mounted on said shaft between said members,means for rotating'one of tating one of said members, and a driving connection between said rotated member and said sleeve for rotating said sleeve and cams.

7. A cam assembly comprising a sleeve, a plurality of cams on said sleeve, a pair of spaced ro tary members, a shaft detachably inserted through one of said members'and threadedly attached to the other thereof,- said sleeve being loosely and detachably "mounted on said shaft between said members, means for rotating one of said members, and detachable clutch connections between said rotated member and said sleeve and between said sleeve and the other of said members for rotating said sleeve and said cams.

8. A cam assembly comprising a supporting sleeve, a plurality of cams adjustably and detachably secured on said sleeve, a pair of spaced rotary trunnion sleeves, a shaft detachably inserted through one of said trunnion sleeves and threadedly attached to the other thereof, said cam sleeve being loosely and detachably mounted on said shaft between said trunnion sleeves, means for rotating one of said trunnion sleeves, and detachable clutch connections between said rotated trunnion sleeve and said supporting sleeve and between said supporting sleeve and the other of said trunnion sleeves for rotating said supporting sleeve and said cams.

9. A cam assembly comprising a supporting sleeve, a, plurality of cams each having therein a tapered mounting opening, a plurality of ta pered collars mounted on and keyed to said sleeve and each located between a pair of said cams and having an end thereof received in the mounting opening of one of said pair, a pair of spaced rotary trunnion sleeves, a shaft detachably inserted through one of said trunnion sleeves and threadedly attached to the other thereof, said supporting sleeve being loosely and detachably mounted on said shaft between said trunnion sleeves, means for rotating one of said trunnion sleeves, and driving connections between said rotated trunnion sleeve and said supporting sleeve and between said supporting sleeve and the other of said trunnion sleeves for rotating said shaft, cam sleeve and cams.

10. In an automatic forming machine, a cam assembly comprising a rotatable support, a plurality of cams mounted on said support, and a plurality of spacingcollars, said collars having tapered outer surfaces and said cams having cor respondingly tapered bores for reception on the collars, said collars being arranged on the support one between each pair of adjacent cams.

11. A cam assembly comprising a rotatable support, a plurality of cams each having a smoothly tapered mounting bore therein, a plurality of spacing collars secured to said support for rotation therewith, each of said collars having a smoothly tapered end received in the bore of one of said cams and mounting the same for adjustment through any desired angle ofrotation, means for pressing said collars and dams together to wedge and secure said cams against rotation relative to rotating said support. g 12. A cam assembly comprising a rotatable supporting sleeve, a plurality .of cams each having a smoothly tapered mounting bore therein, a plurality of smoothly tapered collars secured to said sleeve for rotation therewith and each positioned between a pair of said cams with its tapered surface received in said bore of one of said cams and mounting the same for adjustment thereon to any desired angle of rotation, means for pressing said collars and-cams together to detachably wedge and secure said cams against rotation relative to said supporting sleeve, a pair of spaced trunnion sleeves, a shaft detachably inserted through said supporting and trunnion sleeves for demountably supporting said supporting sleeve, and means for rotating said shaft, supporting sleeve and cams.

13. A cam assembly comprising a rotatable supporting sleeve, a plurality of cam each having therein a smoothly tapered mounting bore, a plurality of smoothly tapered collars keyed to said sleeve and each located between a pair of said cams with one end received in said bore of one of said pair and the other end in laterally abutting engagement with the other cam of said pair, a nut threadedly engaged with said sleeve for pressing said collars and earns together longitudinally thereof to detachably wedge and ,secure said cams against rotation relative to said sleeve, a spaced pair of trunnion sleeves, a shaft detachably inserted in said trunnion and supporting sleeves for detachably mounting said supporting sleeve, and means for rotating said shaft, supporting sleeve and cams.

14. A cam assembly comprising a supporting sleeve having a flange at one end thereof, a plurality of cams each having a smoothly tapered bore therein, a plurality of smoothly tapered collars keyed on said sleeve to slide longitudinally thereof and each positioned between a pair of said cams with one end received in said bore of oneof said pair and the other end in laterally abutting engagement with the other of said pair, a nut threadedly engaged with the end of said sleeve opposite said flange for detachably pressing said collars and cams together between said nut and sleeve to wedge and secure said cams against rotation relative to said sleeve, a pair of spaced trunnion sleeves, a shaft detachably inserted through one of said trunnion sleeves and said supporting sleeve and detachably threaded in the other of said trunnion sleeves for detachably mounting said supporting sleeve and cams, means for driving one of said trunnion sleeves, and driving connections between said trunnion sleeves and cam sleeve for rotating said shaft, cam sleeve and cams.

FREDERICK G. SILVA. EDITH E. DAVENPORT, Emecutriw of William S. Davenport, Deceased.

said support, and means for

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