US1594173A - Double-drum hoist - Google Patents

Description

Jly 27 1926. 1,594,173

c. c. HANSEN DOUBLE DRUM HOIST Filed Oct. l0. 1925 2 Sheets-Sheet 1 .mi A

\ @bi E H N. Q @w nf W 411 :ki B4 X "W 'r El "q INVENTOR.

July 27 1926. 1,594,173

C. c. HANSEN DOUBLE DRUM HOIST Filed Oct. 10. 1925 2 Sheets-Sheet 2` INVENToR., ("afz'lesl'IImza/en.

e1/5% fH/s ATTO EY.

' Patented July 27, i926.

UTED STA'MLS PATENT CHARLES C. HANSEN, OF EASTON, ENNSYLFANIA, ASSIGNOR TO INGERSOLL-RAND COIVIFANY, OF JERSEY GTY, NEVI JERSEY, A CORPORATON OF NEW JERSEY.

DOUBLE-DRUM HOIST.

Application filed October 10, 1925.

This invention relates to hoists, Abut more 'particularly to a hoist ofthe double drum type in which either of thedrurns may be driven from a common driving element.

The objects of the invention are to obtain a constant and uniform braking effect on 'the drums in order to prevent free rotation thereof after the drums have been disconnected from the driving element, to enable the braking mechanism to be readily adjusted and to render the braking element readily accessible for the purpose of inspection and renewal of parts.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention consists of the combinations of elements, features of construction, and arrangement of parts having the general mode of operation substantially as hereinafter described and more particularly pointed out in the appended claims and illustrated in the accompanying drawings. in Which- Figure l is an elevation partly in section of a hoist constructed in accordance with the practice of the invention,

Figure 2 is a transverse view partly in section taken through Figure 1 on the line 2-2 looking in the direction of the arrows, and

Figure 3 is a perspective view of the paWls illustrating the manner in which said paWls are held against relative rotation.

Referring to the drawings, A indicates a base plate which supports at its ends fra-mes B and C. The frames B and C may be secured to the base plate A in any suitable manner and are connected lrigidly at their tops by a tie-rod D which is threaded at its ends to receive suitable nuts E.

Formed integrally With the frame C is a box F which forms a mounting for a motor G. rlhe motor G is in this instance of the square cylinder type in which one biston is adapted to reciprocate Within another piston. Accordingly a piston H reciprocates transversely Within a cylinder J and a second piston K is arranged to reciprocate y vertically Within the piston H. In this Way the combined movements of the pistons H and K are resolved into a rotary movement for rotating a driving shaft L which in this instance is connected to the piston K by means" of a ,crank pinO. Since theimotor 'illustrated in the" drawings forms nopart of pre'sentinveiition and its construction Serial No. 61,636.

and operation are Well understood, further description thereof is considered unnecessary, and it is to be .understood that any suitable reversible motor of compact type may be used for rotating the main driving shaft L.

ln the present instance, the main vdriving shaft L is supported at one end by the frame C and extending longitudinally through the hoist is supported at its other end by the frame B. Encircling the driving shaft L is a center bearing P also supported by the frames B and C and which forms a support for a haulage drum Q. and a tail rope drum R mounted side by side and adapted to roL tate upon the center bearing P. On adjacent sides of the drums Q and R are formed flanges S and T respectively which carry drum drivers U and V. The drum drivers U and V are in the form of teeth having op posed engaging faces, and, if desired, may be formed separately and 'secured to the flanges S and T in any convenient manner.

Arranged rotatably on the center bearing P and between the drums Q and R is a main driver N preferably in the form of a spur gear which meshes With a pinion X keyed to a counter shaft Y. The counter shaft Y in this instance is provided With anti-friction bearings Y and Y2 supported by the frames B and C respectively and projects at one end'into a gear casing Z preferably formed integrally with the frame B. A cover B Which may be secured firmly to the frame C in any suitable manner serves to hold the bearing Y2 in the frame B and forms a pocket or reservoir for oil or other lubricant for the bearing Y2. A gear ZJ is keyed to the shaft Y to mesh with an intermediate pinion c formed integrally with a shaft d and supported at one end by the frame B and at .its other end by a plate e which forms a cover for the gear casingA Z. Keyed to the shaft cl adjacent the pinion c is an intermediate gear f which meshes with a driving pinion g keyed to the main driving shaft L.

A boss L is formed on the main vdriver W and is bored to receive a bushing j having an inwardly extending iiange intermediate its ends. Disposed Within the bushing j are a pair of pawls o and p having trunnions g and r Which extend rotatably into the bushing j and thus provide "pivotslfor said pa'wls.- @latch members s Vpreferably)of seinifoireular shape, are formed on the trunnions g and r to interlock with each other when the pawls are in their normal position so that the paWie o and pxvili be simultaneously rocked about their pivot. The' portions comprising the clutch members s are in this insta noe oi smaller diameter than the trunnions g and r thus forming` shoulders u,

which, When the pawls are" in their proper position in the busiiingj, will abut the tiange vv/12 and thus preyentthe trunnions :troni slidinglongitudinally Withinthe bushing f,i.A z ,The paivlsoand p in this instance areidentieaiiy alike so that if one ofthe pawls is subjected to harder usage than the otherrpaivl, as is frequently the case, the pawls may be interohanged, e v

, In order to porghoid the eluteh meinbersis Constantly in engragenientjvith each other, a boit o is extended through seid trunnionsanjd balsa nut infor clamping4 said pamvlsin relativeposition. VEhe bossi and thebushing,` areinthis instance relieved as at es to permit tree oeillation of A.the pe wvls, ,in this Way a shoulder Q/ 4isI ornied rearwardly ofeaehpaWll to torni a support for thepawls when said pawls engage the drum drivers.i

Suitable brakes, are usually. provided in hoists of this typeiior. preventing; reerotationot the drums when they are disconneetedv-fronr the drivingI elernent, ln the present i1 1stant e, semi-eireular bends e are arranged to bearagainst the flangesi'by and T, preterablyibeneath said ianees, and Carry at thei ends screws 2 and flfhe'eereiv is provided with a pair otadjusting n nts and extends through abraeiret tpreferably piroted on a yoke 5,' Whieh yokeinrthisjnstance, is supported by the rod to partly enoirole the inain driver WT and is held against endxvise inoveinent by suitable spaeers D interposed between said yoke and theendfraines B and@ -norder to. hold the-yoke egainstosoillatory movement on the roti. i) one end of the yoke is seeuredto an arm irforined onl the basen, The yother end-01"* theyole is supported by el strap C eeeuredtothe base A -by boltsCg, The niezrns -Wherebythe yoke 5 is secured to the strap Cf maybe a suitabie` pin C3 which also forinsa, pivot for the braelet i. `The screw *ende througlnthe yoke and like the sieiv 2l screw threaded ,at its tree end to reeeive a;thnnib nut 7 whereby the band may be tighten/ed. v

Ln `the opera-tionof .the hoist, assuming that .the drivinGT Shaft L iSibeinglQleCl ,in eeounterelockwise. direetio-n, rotary motion Ot Ath Shaft' this; diretti 5111 11 Ci. 1V

forced into engagement4` withl the drinn driver V and rotate the drum R `with said main driver. VlUpon reversal of the main drivingshaft L the direction of rotation of the inni driver will also be reverecd, thus disconnecting; the pavvl o troni the drinn driver V and sin'iultaneously actuatingl the pavvi j) into engagement with the drum driver U on the druin Q and rotate said drinn Vith the niziin driver.

l'ronrtlie foregoingiitjvill beseen that the on of rotition ofeith'er`-drunriis at all tiines o ounterto-the Ytlireotioi'i otrotation of the main drivinpfshait After one re other of the drulnshave been diseonneeteg troni rnairrdriven said driiin'e'- will be' h`eld-fag'ai1ist' free" rotation Vby the br' king at ienjot the bands e,' it being` understood that the bands e are'preferably sonadjnstedes to eXertJa eonstant braking effet-ten thfev tlanges@ and T," Vhenever the brai-e bands e "beoon ief somewhatWorn, they inay b'elreadily .adjustedjto grip the MUSE. OSQiQS/@y b5. vlflflifmli". Sefwng dow-H the thumb-,11,11% 7iA .Qn fhe'SQlVS 31g By thistorniofoonstruetion, t e brakingjnieohan n is at a ll times;aciessible'-for' purpo of inspeetioirand' ne v partslinay' vbe substituted for Worn'parts With a' minimum expenditure of' tirne.l

v;l. in a hoist, the lConilfnation of areversibleniotor, a driving!" shaft 1connected to be rotated byy theinotor, end frames supl'gorting the driving` shaft',afpa ir of druins rotatable about the driving' shaft', a' .1nain driverbetnfeenthe;druinsrconneeted to berotat'e'd by the driving` shaft, elutc'h rneinbers carried by the ,main driver for selectively eonnecting one'or .tl'ieother of thedruins to be driven by thev niain driver, ianges carried by the drinne, a' tie rdeonneoting the end trainee, yoke .supported bythe tiered, and braking ineensV pivote'd to thepyolr'e V Coenert a braking eiieet`-o1i` the 'rgesv for checking the rotation of the drinne uponthe release of the .diiiins'from'theniein driver. A

2. In a hoist, the oinbinatienoff a reversible inotor, a driving sh fteonneoted to' be rotatedb f' the motor, end trainee the driving shaft, apair of drums rotatable about the driving' sliaita main driverbetiflfeen .thedrinne eonneeted to be rotated -by the di shaft, @hitchy nieinberls"oa'riied'by the .i n .in driverl for Selectix'ely Cf'iiinedting` one I or the other of the vdriiins, al ltiel `rod oonnbeting the upperends Qttheend iframes, a' reke-Supportefl byliheli rQCl-rri'ly .@11-

Circiingj the niain driver, means for pre.

3. In a hoist, the combination of a reversible motor, a driving shaft connected to be rotated by the motor, end frames supporting the driving shaft, a pair of drums rotatable about the driving shaft, a main driver between the drums connected to be rotated by the driving shaft, clutch members carried by the main driver 'for selectively connecting one or the other of the drums to be driven by tbe inain driver, flanges on adjacent ends oi: the drums, a

tie rod connecting the upper ends of the end frames, a yoke supported by the tie rod partly encircling the main driver, means for preventing oscillation of the yoke, and semicircular brake bands pivoted to the yoke extending beneath the flanges to act constantly against the flanges for preventing free rotation of the drums When the drums are disconnected from the main driver.

In testimony whereof I have signed this speciication. y

CHARLES C. HANSEN.

Images