US1940810A - Hoisting mechanism - Google Patents

Description

Dec. 26, 1933. R. c. OSGOOD 1,940,810

HOISTING MECHANISM Filed Oct. 20, 1928 2 Sheets-Sheet l Arm Dec. 26, 1933. Q OSGOQD 1,940,810

HOISTING MECHANISM Filed Oct. 20, 1928 2 Sheets-Sheet 2 (5/ -v 6? 60 gg [WU/A83 (i Roberta 051 006;

D wenZa 1 ,4- hay a- Patented Dec. 26, 1933 HO'ISTING MECHANISM Robert C. Osgood, Claremont, N. H., assignor to 'SullivanMachinery Company, a corporation of Massachusetts I Application m 20, 1928.

Serial No. 313,904

19 class. (01192-4 the reduction gearing contained in the gear box This invention relates to hoisting mechanisms. More particularly my invention'relates to mechanism for controlling the operations of a hoist.

One object of my invention is to provide an drive control mechanism for' the winding mechanism of a hoist and improved brake mechanism cooperating therewith. A still'further' object of my invention is to provide braking mechanism for a hoist which shall be automatically applied in connection with the operation of the drive control mechanism of thehoist. Other objects and advantages of my invention will appear from the ,following description and will be further the'position' shown in Figi'l, the corresponding internal gear will be free to rotate idly without pointed out in the claims.

In the drawings,

".Fig. l is a side elevationof a double drum" hoisting mechanism which vis controlled by an illustrative embodiment of my improved control -mechanism'. l

Fig. 2 is an end viewin elevation, taken from the right end of Fig. 1.

Fig. 3 is a detail view with parts broken away, showing the coaxial control shafts.

v Fig. 4 is a detail view' showing abrake shoe cooperatingwith a flange of one "ofthe drums,

the brake shoe being shown in section on the line-4 ofliig. 5. I f Fig. 5 is a detail view with partsomitted, this *viewshowing, in end elevation, a brake shoe Fig.6is a fragmentary vertical sectional View.

applied to theflange of a drum.

taken on the axis of the windin drums.

- ,In the illustrative example shown'in the draw- 7 vings, the hoisting mechanism comprises a base 6 which carries a pair of supporting standards '7 and S. A pair-of drums 9 and 10 are supported between standards 7 and 8. A motor 11 (herein illustrated as an electric motor) is provided to drive the winding mechanism, this motor being shown as-bolted to an extension'of the base 6. Driving connections are provided between .the motor 11 and the drums 9=and 10,these connections including reduction gearing contained in a gear box 12. The driving connections further include planetary gearing, one set of planetary gearing being provided at the outer end of each drum. The nature of these sets of planetary gearing is madeclear'by Fig.6, which illustrates the set or planetary gearing forthe drum. l0. Sinc'e' the two sets are similar, a, description of one set will suifice for, both. Thecentral shaft 40, whichis driven from the motor 11 through 12, provided adjacent each end with a pinion 41. One pinion 41 is shown in Fig. 6 as meshing with a drum driver pinion 42 carried on the end of a shaft 43 which projects to the right from the drum 10. An internargear 44 completes the set of planetary gearing, the pinion 42 meshing with the internal gear'44 and rolling around within this gear asa track when the drum '10" rotates. A brake is provided to cooperate with to hold its respective internal gear stationary to produce rotation of drum 9,-and brake 14 being adapted to hold its respective internal gear stationary to produce rotation of, drum 10. If, on the other hand, the brakeli be released to each internal gear 44, thebrake 13 being adapted v driving the drum 10. In the'same manner, the

brake 13 maybe released to interrupt driving ofthedrum a The brake mechanisms at the two ends of the hoist are substantially similar; and therefore a description of the brake l4. and the mechanism cooperating therewith will be sufi'icient to make clear the operation'of the entire control mechanism. The brake 14 includes a brakeiband 15 which cooperates with abraking surface sur-- roundingthe internal gear. I J nism 16 is operated by a control lever l'l toclamp A toggle niecha'-;'

or release thejbrakeband 15. A-1ever-1 8 is con nected to the lever 17 by a connectingrod-l9 pivoted to the lever 17 at 20 and to the outer end of the lever 18 at 21. The innerend of the lever '18 is secured at 22 to a hollow shaft 23 ,(seeFigs. land 3). The hollow shaft 23 is rotatably supported in a' bearing member 32 which is secured to the base 6. It is therefore obvious that the lever 18 rocks about the axis of the shaft23. I I

The'operation of the above described mechanism' may be controlled bya'lever 25 with a handle 26,.the lever 25 being secured at 27 to the hollow shaft 23. The lever li} carries inter mediate its endsa brake shoe 28'. A stud 29,

passing through the brake shoe inv the manner shown in Fig. 4, is carried by the lever 18. Once the position of the shoe'28 relative to the lever 18 is adjusted, the stud 29 secures it in this position. The brake shoe28 cooperates with the rim of the drum flange at'the right end of the winding drumlO. I v

The operator, by grasping the handle 26, may apply the brake mechanism 14 to hold stationary the internal gear 44 at the right end of the hoist.

This will produce rotation of the drum 10 if the motor 11 is running. When the rope has been hauled in to the extent desired, the operator releases the brake mechanism 14 by moving the lever in the opposite direction. This automatically swings the lever 18 so as to apply the brake shoe28 to the flange of the drum is. This prevents spinning of the drum 10. The advantage of this is obvious, since it will be apparent that the momentum acquired by the drum 10 during apaying out operation might cause it to spin, thus paying out too fast and making possible kinking of the rope and other di'iliculties due to a slack rope. As soon as the brake mechanism M is again applied to cause winding in of the rope on the drum 10, the lever 18 is automatically swung outward so as to free the drum from the brake shoe 28.

The control mechanism at the left end of the hoist, which includes the brake 13, is similar to that which has just been described in connection with the right end of the hoist, and includes a second shaft 30 which is supported in a bearing bracket 31 secured to the base 6, and also in the hollow shaft 23, which as previously described is supported in the bearing member 32. To the I right end of shaft 30, which projects beyond the may station himself at theright end of the hoist and control both drums 9 and 10. It is-further apparent that as soon as either brake 13 or 1.4 is released to interrupt driving of the corresponding drum, spinning of this drum is prevented due to the, automatic application of the corresponding brake shoe to the rimof the drum flange. 40

While I have in this application specifically described one form which the invention may assume in practice, it will be understood that this form of the same is 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.

. What I claim as new and desire to secure by Letters Patent is:

In a-hoisting mechanism having a drum, a .motor and driving connection between the drum drum including an operating lever, and a link.

connecting said operating lever to the lever carrying said braking means. a

,2. Controlling means for a hoisting mechanism having a winding drum, a motor, driving connection between said drum and motor, and a :base, comprising a lever pivoted to the base, a

link connected to said lever, a brake shoe for the .drum carried by said lever, and means for controlling'motor actuation of said drum comprising an actuating member, said link connecting said lever to said actuating member.

3. Controlling means for a hoisting mocha nism having a winding drum, a motor, driving connections between said drum and motor, and a base, comprising a lever pivoted at one end to I the base, a link connected to ihe other end of said lever, a brake shoe for the drum carried by said lever, and means for controlling motor actuation of said drum comprising an actuating member, said link connecting said lever to said actuating member.

s. In a hoisting mechanism, a drum, a driving element, gearing connecting said element and said drum including a reaction gear adapted when released to rotate without driving the drum, and when held to produce rotation of the drum, controlling means for said reaction gear comprising an actuaiing member, braking means for the drum oscillatable about a pivot, and a link connected to said braking means and to said actuating member. g

5. In a hoisting mechanism, a drum, a driving element, gearing connecting said element and 90 said drum including a reaction gear adapted when released to rotate without driving the drum, and when held to produce rotation of the drum, controlling means for said reaction gear comprising an actuating member, braking means for the g5 drum oscillatable about a pivot,a lever for oscillating said braking means, and a link connected to said braking means and to said actuating member.

6. In a hoisting mechanism, element, gearing connecting said element and I said drum including a reaction gear adapted when released to rotate without driving the drum, and when held to produce rotation of the drum, controllingmeans for said reaction gear com-"1'05 prising a lever, braking means for the drum, means for. applying said braking means comr prising a shaft and means for oscillating said shaft, said braking means being secured to and...

supported by said shaft, and a link connecting 11 said lever to said braking means.

7. In a hoisting mechanism, coaxial drums,

driving means therefor including drive trains whose terminal elements lie at the remote ends oi the drums, means also at the opposite ends of saidi drums controlling the transmission of power vto interrupt power transmission thereto, and

means at one end of said drums permitting control of both said drums from that end. V

8. In a hoisting mechanism, coaxial drums. journaled for rotation but confined against longitudinal movement relative to each other, driving means therefor, means at opposite ends'of said drums controlling the transmission of power thereto by said driving means, means operatively connected with said controlling means and con u v trolled and actuated thereby for automatically brakin each of said drums as its respective controlling means is operated to interrupt power transmission thereto, and means at one end or. said drums permitting control of both said drums" from that end. v

9. In a hoisting mechanism, coaxial drums, driving means therefor, means at opposite ends of said drums controlling the transmission of. power thereto by said driving means, means operatively connected with said controlling means and'actuated thereby for braking each of said drums as its respective controlling means is operated to interrupt power transmission thereto, and operating means at one end of said drums for permitting control of both of said drums from that end, said braking means being operative to exert a braking force proportional tothe braking effort applied to said operating means.

10, In a hoisting mechanism, coaxial drums, I

a drum, a driving mg driving means therefor, means at opposite ends of said drums controlling the transmission of power thereto by said driving means, means operatively connected with'said controlling means for braking each of said drums automatically as its respective controlling meansis operated to interrupt power transmission thereto, and means for controlling both of said drums from one end means of the drum further therefrom.

11. In a hoisting mechanism, a hoisting drum, I

braking means for said drum including a braking element having frictional engagement with said drum, operating means for said braking means including an element upon which said braking element is wholly supported for bodily movement relative to said drum intoand out of braking position, drum driving means including a rotatable final driving element for said drum rotatable relative to the latter during drum drive and having its axis of rotation at all times at a fixed distance from the periphery of the drum, said drum driving means having a control element, and a connection between said brake operating means and said control element whereby movement of the brake operating means effects actuation of said control element to control drum drive. 12. In a hoisting mechanism, a drum, braking means therefor including a member movable to apply and release said braking means and moving in a plane, drum driving means; and a control element for said drum driving means moving in the same plane with said member. r

13. In a hoisting mechanism, a means therefor including a member movable to apply and release said braking means and moving in a plane, drum drivingmeans, and a control element for said drum driving means moving in the same plane with said member, and a link connecting said member and element.

14. In a hoist a winding drum, driving means thereforincluding a motor, andimeans operable while said motor is rotating for selectively establishing and interruptinga driving connection between said motor and said drum, and means for automatically braking rotation of said drum wheneverthe driving connection is interrupted and for automatically releasing said braking means entirely before the driving connection is established, said means for establishing and interrupting a driving connection and said braking means having a common control including an arcuately movable arm to which each is operatively connected at a'point spaced from'and at the same side of the arm pivot.

15. In a hoist, a winding drum, driving means therefor including a motor, a rotatable final driving element for the drum rotatable relative to drum, braking the latter during drum drive and having its axis erated by said operating means for braking ro-" tation of said drum when driving relation between-the latter and the motor is interrupted,

said operating means including an element through which the driving means and the'brak- 'ing means are controlled and which wholly supports the braking means for bodily movement relative to the drum and which is operative to release the braking means whenever the operating means is moved to a position to establish driving relation between the drum and themotor.

16. In a hoisting'mechanism, a hoisting drum, driving means for said drum including drive control means and a rotatable final driving element for said drum rotatable relative to the latter during'drum drive and having its axis of rotation at all times at a fixed distance from the.

periphery of the drum, operating means for'said .drive' control means, and braking means for said drum including an element'carried by an ele-' ment of said operating means and wholly supported thereby and actuated thereby and bodily movable into and out of braking position.

17. In a hoisting mechanism, a hoisting drum, braking means for said drum including a braking element having frictional engagement with saiddrum, operating means for said braking means including an element upon which said braking element is exclusively supported, the braking force imparted to said braking element being manually regulated directly through said operating means, drum driving means having a l. control element, and a rotatable final driving element for said drum rotatable relative to the lat.- ter during drum drive and having its axis of ro tation at all times at a fixed distance from the periphery of the drum and a connection between said brake operating means and said control .element whereby movement of the brake operating" means effects actuation of said control element to control drum drive.

and cessation of drum drive; said member being movable in a direction to increase the distance of its moving end from said drumin effecting the starting of drum drive, and braking means for said drum operatively connected with said member at apoint spaced from its axis of arcuate movement. a

' 19. In a hoisting mechanism, a drum, braking means therefor including a member movable to apply and release said braking means and moving in a plane transverse to the axis of said drum,

drum driving means, and a control element for' said drum driving means moving in the same plane with said member.

' ROBERT C. OSGOOD.

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