US1792116A - Hoisting mechanism - Google Patents

Description

C. F. OSGOOD HoIsTING MEGHANISM Feb. 10, 1931.

Filed March 24, 1924 Patented Feb. 10, 1931 UNIT-.|5111 PATENT ojFprFlcE g VCHARLES r.V o'SGooD, orienARiiiifiour, HAMPSHIRE,` ASSIGNOR To suLLivAN l MACHINERY coMrANY, A ooizroRATIoNor MASSACHUSETTS Y' Hors'inve MECHANISM Application 1ed Buch24, 1:924. Serial No. 701,361.

This invention relates to a hoistingv mech.

anism.

Y It has for its object to provide an fim` proved hoisting mechanism. A further-object is to` provide improved hoisting mecliaf nisin having improved driving r connections` between the driving motor and drum means.` Another object is to provide a driving-motor whose power generating elements are 1g continuously operable in only va single manner while the supporting elements therefor are rotatable in opposite-directions depending upon which one of the pluralitylofv drums is driven. A still further Objectis to i5 provide an improved hoisting mechanisml having a plurality of rotatable drums in` combination with a motor O f the previously mentioned `type and automaticmeans forV forming a positive driving connection-befV 2o tween one of thevdrums and Said motorl upon one direction of movement of the motor Vsup,-v

porting elements or to automatically-engage the other drumwhen opposite direction of movement of the motor supporting element 25 is had. A further objectl is to provide im proved supporting means for; said drums,

such meansl includingiafl bearing support. upon the periphery of the motor housing..

By my improved construction there is prac- 30 tically no relative movement between the drum and the motor housing regardlessof which drum might be positively driven and which construction thereby reduces friction losses to a minimum and also excessive wear 35 and tear on the bearings. Y In the accompanying drawings I have shown for purposes of illustration two forms which my invention may assume in practice.V

\ In these drawings,-

Fig. 1 'is a vertical longitudinal sectionV site ends of ithe opposite rotor shafts, the

drum mechanism and reduction gearing is'- substantially the same on each end and the de.-

scriptionof one will serve forthe other. Rof` tatably mounted in each of the standards is a hollow stub shaft l having a radialflangev 5V to which'is removably secured an annular ange 7 forming a brake Swith which a mann ually operable brake band 9cooperates, while carried on the inner side of saidannular flange is van internalgear 10 withjwhich driving gears cooperate, to be described later. In my improvedmechanism the driv-V ing motor housing 11 is rotatably mounted within the hollow portion of the shafts ll. More specifically, `the motor housing 11 com-` prises an elongated casing within whose pe- Y riphery is a central portion 12 having overlapping bores within which. are mountedrin;

termeshing rotors13 rotatably mounted inV bracketsliixed tothe central portion 12v by any suitable screw connections desired. Thuschambers 15 and 16 are formed between the members Maand the ends of the casing 11, and end closure gear supporting meme bers y17 are secured to'theseends as by screws 18. Projecting outwardly from each of the members 17 are stub shafts '19 rotatably Y i mounted within bearings 20 carried inthe hollow portion of the stubv shafts 4. l

Thereduction gearing between the rotors 13 v and the drum comprises pinions 21 mounted on oppositeends of the opposite rotor shafts. The gearing fromnow on is iden- 1 tical for each'drum and hence only one-end needs to be described. The pinion 21 meshes with an internal gear 22 xed upon ashaft 23 also carrying a pinion 24:, said shaft being .coaxial with the drum axis and rotatably mounted within a bearing 25 .carried bythe rotor bracket 14, while the other end of said shaft is rotatablyvmounted within the member 17. Also carried by the-member 17 and` adapted to mesh with the pinion 241 is a gear 26 iXed upon a rotatable shaft carrying a pin! ion 27 meshing with an idler gear 28 rotatably carried by the member 17 and engagingJ the internalgear 10.

Mounted upon the periphery of the motor casing 1l are right and left hand drums29 and 30 which have adjacent abutting radial and annular flange members 31 and 32 respectively, while groves 33 and 34 form braking surfaces for brake bands 35 and 36 to brake rotation of either of the drums. The other ends of said drums are held in their operative position relative to the motor housing, as by the outer radial portions of the members 17 which engage the ends of thrust bearings 37 and 38. The lianges 31 and 32 are so disposed that there is an annular chamber 39 formed therein within which is mounted an automatically shiftable pawl mechanism 40. This pawl mechanism comprises an annular ring 41 disposed upon the periphery of the motor housing and having keys 42 projecting inwardly into keyways 43 formed in the periphery of said casing, which accordingly positively carries the rin g 41 therewith. Projecting outwardly from each side of the ring 40 are the pawls proper comprising reversely directed combined cams and pawls 44 and 45 having inclined surfaces 46 and 47 adapted to engage, when in one position or the other, ratchet teeth 48 or 49 formed respectively on the inner side of the radial flanges 31 and 32, it being noted that these ratchet teeth are likewise of an opposite na-` ture so as to cooperate with the reversely directed pawls.

A usual means may be used for supplying live pressure liuid to the motor herein shown as comprising a valve 50 adapted to allow flow of Huid through a. passage 51 formed in the shaft 19 and motor housing. A -usual feeding cable 57 disposed upon the periphery of the drum 29 is wound thereon, we will say from'the upper side, while the cable 58 on the other drum is wound thereon from the under side. Thus with both drums rotating in the same direction one cable will be feeding in while the other is feeding out and vice versa.

Inl Fig. 3 I have shown a modified form of ratchet and pawl mechanism which comprises individual pawl members 52 slidably mounted in keyways formed lin the periphery of the motor housing and having reversely directed pawls 53 and 54 adapted to engage ratchet teeth 55 and 56 formed respectively onA the right and left hand drums 29 and 30, these teeth also having cam surfaces for shifting said pawl.

In the operation of my device employing either the preferred form of ratchet mechanism or the modified form, live pressure fluid will be admitted to the motor 1 to 'continuously operate the same. It will be assumed that the drum 30 is being driven as by holding the left hand internal gear 10 stationary as by the brake means, in which case the ratchet mechanism 40 will be positioned as shown in Fig. 2, thus positively driving the drum 3() as through the key and keyway connection 42 and 43. In this case, the cable 58 will be wound in on the under side while the cable 57 on drum 29 will be permitted to freely pay out from the upper side thereof to cause rotation of said drum in the same direction as the drum 30 and the motor housing 11. In such a construction it will be noted that there is no relative movement between the driven drum and motor housing and no substantial relative movement between the other drum and the housing. If now it is desired to drive the drum 29 in the reverse direction to wind in the cable 57, the left hand brake 9 will be released while the right hand brake 9 will be operated to prevent rotation of the right hand internal gear 10. Due to the fact that the reduction gearing on the right hand side'is driven by the pinion 21 opposite ly rotated from the pinion 21 driving the left handreduction gearing, the motor housw ing' will tend to rotate in the opposite direction to the operation of the drum 30. The result is that the pawl 40l will automatically be thrust in a right hand direction due to their cam surfaces out of engagement with the ratchet teeth 49 and into engagement with teeth 48 liXed tothe drum 29, thus positively driving the latter and thereby winding in the cable 57'on the top side of the drum 29 while allowing paying out of the cable 58 on the lower side of the drum 30 and causing the latter to rotate inthe same direction as the motor housing 11. Thus it will be seen that no matter which drum may be pulling a load, there will be substantially no relative movement between both of the drums and the motor housing. This operation is automatically taken care of.

lVhile I have in this application specifically described two `forms which my inventionmay assume in practice, it will be understood`v thatthese forms of the same are shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

TWhatI claim as new and deside to secure by Letters Patent is:

1. In a hoist, a motor having a rotatably supported cylindrical casing, means driven from opposite ends of said motor for elfe ting rotation of said casing in opposite directions, a pair of relatively rotatable winding drums surrounding and jo-urnaled on said casing, and means for alternatively connecting said drums to said casing automatically in accordance with the direction of rotation thereof.

2. In a hoist, a motor having a rotatable cylindrical casing, means including manually operable slip control means operatively connected to the opposite ends of said motor for effecting rotation of said casing in opposite directions, a pair of relatively rotatable winding drums surrounding and journaled on said casing, and means for alternatively connecting said drums to said casing autollU drums and said housing to rotate together;

Y during one direction of rotation thereo-f and Vwinding drums, a driving motor disposed in said drums and comprising av rotor Velementf rotatable about its own axis in only one direction, and a rotatable housing therefor, means driven by said motor for, effecting rotation Vof said housing in opposite directions, and

driving connections between said drums and honing including means governed by the direction of rotation of said housing for automatically connecting one or the other of said drums to said housing foripositive rotation therewith and for releasingthe other drum therefrom.

5. In a hoist, a pair of relatively rotatable coaxial winding drums, a driving `motor, having a unidirectionally rotative rotor element and a rotatable housing. upon which said drums are journaled, means driven by 4said motor for effecting rotation of said housing in opposite directions, and means for connecting'said drums to said housing for rotation therewith. y

6. In a hoist, a pair of relatively rotatable 6. winding drums, a motor disposed within said other of said drums to said casing Vautomatically in accordance with the direction of rotation thereof.

7. In a hoist, a pair of relatively rotatable winding drums, a motor having a rotatable casing, means driven from opposite ends of said motor for efecting rotation of said casing in opposite directions, selectively oper-l able slip control devices for controlling the drive of said casing, the casing rotating in one direction upon application of one of said devices and rotating in the opposite direction upon application of the other device, and means for connecting one drum or the other to said casing for rotation therewith.

8. In a hoist, a pair of relatively rotatable winding drums, a motor having a rotatable casing, means driven from opposite ends of said motor for effecting rotation of said casing in opposite directions, selectively operthereof.

able slip control devices for controlling the drive of said casing, thecasing rotating in one direction upon application of one or said devices and rotating in the vopposite direc# vtion upon application of the other device, and,

means for connectingV one or the other of said drums to saidcasing automatically in accordance with the direction vof rotation 9. In a hoist, a plurality lof coaxial relatively rotatable winding drums, and means for supporting and for effecting selective r0- tation'fof said winding drums including a motor, a substantially cylindical rotatable casing enclosing said motor and having said drums journaled upon its periphery, means driven by said motor for effecting rotation of said casing in opposite directioils including during drive in each direction a gear carried by the casing and rotatable upon an axis parallel to but offset radially froinithe axis i of the casing, a member carrying a gear with Vwhich said first mentioned gear is arranged to mesh during drum rotation, and releasable locking means for said gear carrying member,

and means for locking one or the other of said drumsto said'casing for rotation therewith. l0. lIn a hoist, a plurality of coaxial relatively rotatable winding` drums,`and means for supporting and for effecting selective rotation of said winding drums including a motor, a substantially cylindrical rotatable casing enclosing said motor and having said drums journaled upon its periphery, means driven by said motor for eifecting rotation of said casing in opposite directions including during drive inV each direction a gear carried by theV casing and rotatable upon an axis par-A allel to but offset radially from the axis of the casing, a member carrying a gear with which said first mentioned gear is arranged'to mesh during drum rotation, and releasable locking means for said gear carrying member, means for locking one or .the other of said drums to said casing 'for rotation therewith, automatically connecting one of said drums to said casing during rotation of the latter in one direction and the other drum to the casing during rotation of the latter in the other direction, and means under operator control for braking said drums at will.

Intestimony whereof I affix my signature.

CHARLES F. OSGOOD.

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