US594801A

US594801A - Chain hoist

Info

Publication number: US594801A
Authority: US
Publication date: 1897-11-30
Anticipated expiration: 1914-11-30

Description

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J. W. K'INCAID; CHAIN HOIST. No. 594,801. Patented Novf30, 189.7.

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JOSEPH W. KIN OAID, OF READING, PENNSYLVANIA, ASSIGNOR TO THE READING CRANE AND HOIST WORKS, OF SAME PLACE.

CHAIN HOIST.

SPECIFICATION forming part of Letters Patent No. 594,801, dated November 30, 1897.

Application filed September 1, 1897. Serial No. 650,303. (No model.)

ToaZZ whom it may concern.-

Be it known that I, JosEPH'W. KINCAID, a citizen of the United States, residing at Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Double-Geared Chain Hoists, of which the following is a specification.

This invention relates to portable chain hoists, and particularly to a double-geared differential chain hoist, the same being designed as an improvement upon the invention disclosed in my application for Letters Patent, Serial No. 629,083, allowed April 24, 1897.

The prime object of this invention is to provide a double-geared chain hoistthat is, in addition to the bevel-gears and pinion shown in said application, an internal gear is formed on a portion of the hoist-frame and a series of planet-gears mesh with said internal gear, forming a sun-and-planet gear, and a pinion on one of said bevel-gears meshes with the planet-gears in order to increase the power, strength, and efficiency of the hoist.

A further object of the invention is to provide an improved brake-shoe composed of a series of links of novel and peculiar construction, whereby the shoe is given a greater hearing on the brake-Wheel.

A further object of the invention is to provide new and improved means for forming a bearing for the inner end of the pinion-shaft and for connecting the shoe to the hoist-frame, so that the shoe is fixed against movement.

A still further object of the invention is to provide a novel and peculiar frame of special construction to give strength and rigidity to the machine, yet to be light in weight and to admit of ready access to the several parts composing the hoist.

Other objects and advantages occurring from the general arrangement of the several parts will be revealed in the specification and claims to follow.

The invention consists in the construction and organization of the several parts, which will now be pointed out in detail and then succinctly specified in the claims to follow.

. gears in mesh with fixed internal gear.

In the accompanying drawings, forming part of this application, Figure 1 is an edge view. Fig. 2 is a side elevation. Fig. 3 is a similar view of the opposite side. Fig. 4 is an enlarged section on the plane indicated by the dotted line w m, Fig. 2. Fig. 5 is a similar view on the plane indicated by dot ted line yo, Fig. 3. Fig. 6 is an enlarged section of bevel-gear pinion, showing planet- Fig. 7 is a detached perspective view of the brakeshoe. Fig. 8 is a perspective view'of a hooked chain-keeper. Fig. 9 is a detached view of the bevel-gear having ratchet-teeth, partly broken away and partly in section, showing the brake-Wheel on said bevel-gear and the pawl engaging the ratchet-teeth. Fig. 10 is an inner plan view of one portion of the main frame. Fig. 11 is an inverted plan view of the ring for holding the brake-shoe and forming a bearing for the inner end of the transverse pinion-shaft. Fig. 12 is an edge view of said ring. Fig. 13 is a sectional view of the planet-gear frame.

The same numeral references denote the same parts throughout the several figures of the drawings.

The main frame of the machine is composed of two separate and distinct circular parts 1 and 2, having peripheral interlocking flanges 1 and 2, secured together by set-screws 3 and set-bolts 4, said bolts also securing the head of a swivel-hook 5 in a pocket formed by the half-sockets 6 upon each part of said frame. The said hook-head 7 is formed integral with the hook and stem, thus making the hook, stem, and head all in one piece to avoid the screw and nut usually employed or to obviate the screwing and riveting of the head to the stem.

The frame portion 1 has a bearing 8 for the outer end of the transverse pinion-shaft 9, and the inner end of said shaft works in a bearing on the brake-shoe keeper-ring 10. Projecting inward from said bearing to the center of the frame portion 1 is an arm 10, and a'similar arm 11 extends from the halfsocket 6 to the center of said frame portion, where is formed abearing 12, to which is fixed by a cotter-pin 13 one end of ashaft 14. At the juncture of the arm 11 and the frame the surfaces 54 for the lift-chain 50.

portion 1 are cars for a finger 16 of the ring 10, hereinafter to be more particularly described.

The frame portion 2 has an internal gear 17, and this portion being secured to the frame portion 1, as hereinbefore stated, makes the gear 17 fixed. The outside of the frame portion 2 is provided with a depending arm 18, which terminates at the center of the said portion in a bearing 19 to hold the other end of the shaft let fixed thereto. An outward projection 20 from the bearing 19 and an inward projection 21 from the periphery of the frame portion 2 hold a bolt 22, upon which is pivoted a lift-chain keeper 23, hereinafter to be particularly described. A lift-chain divider 24: has one end secured to the said frame portion 2, and the other end projects into a peripheral groove of the lift-sheave 25. This sheave 25 is formed integral with the planet-gear frame 526, which is composed of a series of vanes 27, having the countersunk planetgears 28 journaled thereto by screws 29 and meshing with a pinion 30 on the outside of the bevel-gear 31. Another bevel-gear 32, having internal ratchet-teeth 33, is placed opposite the gear 31, with the transverse pinion 34: between and meshing with both bevelgears. These gears as well as the lift-sheave and brake-wheel 35, are all loosely mounted on the shaft 14. The brake-wheel has a V- shaped periphery and carries a pawl 36, held in engagement with the teeth 33 by a spring 37.

A guide 38 is secured to the frame portion 1, and a similar guide 39 is secured to the frame portion 2, for the hand-chain 40,which operates a dished hand-wheel 41, keyed to the outer end of the transverse pinion-shaft 9 by a key 41.

The brake-shoe consists of links 42, 4:3, 4%, and 45, all of which are joined together by pins 46, making a chain shoe. The links 42 and the link 4-3 are \I-shaped upon the inner side to fit the V-shaped periphery of the brakewheel 35. The top of the link 43 has projections 47, between which a projection or lug 48 of the keeper-ring 10 is held. The link has the swivel-fork 49 attached, and to said fork is secured one end of the lift-chain 50.

The latter is passed through a pulley-block 51 and over the lift-sheave 25, the other end of said lift-chain being hung from the hook 52 of the lift-chain keeper 23. The keeper 23 rests upon a lug 23, formed on the frame portion 2, and has a bearing 53, through which it is pivoted to and between the projections 20 and 21 of said frame portion by a pivot-bolt 22. The keeper is provided with curved surfaces 5et of the same radius as the periphery of the lift-sheave and has a groove 55 between The weight of the depending portion of the liftchain from the keeper-hook holds the latter down upon the lug 23 with said groove and surfaces of the keeper in proper position to keep the lift-chain in place upon the liftsheave without friction between the keeper and the chain or between the keeper and the sheave.

The keeper-ring 10" fits over the hub 56 of the brake-wheel 35 and has a peripheral flange 57 extending over one periphery of the said wheel. In addition to the projection 48,which extends over the wheel, and the finger 16, extending upward from the end of said projection, the periphery of the keeper-ring has a lug 58, in which is formed a bearing 59 in line with the central periphery of the wheel for the inner end of the transverse pinion-shaft 9.

The driving mechanism consists of the bevel-

gears

31 and 32, the transverse shaft 9 and its pinion 34, the hand chain-wheel 41, the sun-and-planet gears, the lift-sheave, and the internal fixed gear 17.

It will be observed that the sun-and-planet wheels and the lift-sheave are within the frame portion 2, the brake-wheel and its shoe being between the bevel-gears, and the latter with the transverse pinion are within the frame portion 1. Thus is obtained a compact and symmetrical construction of a sun-and-planetgeared hoist or a double-geared differential hoist having the minimum of friction with the whole lifting and brake mechanism in the central line of the machine between the liftchain and suspension-hooks.

It will be further observed that by the peculiar construction of the brake-shoe the latter has a bearing not only on the top of the brake-wheel, but also upon each peripheral side of the said wheel, thus producing a frictional bearing'almost entirely around the said wheel.

The operation of the machine is as follows: In hoisting a load or weight the hand chainwheell being turned to the right revolves the pinion 34, which turns the bevel-

gears

31 and 32 in opposite directions, causing the ratchet-teeth 33 to pass over the pawl 36. The pinion 30 being integral with the bevel-gear 31 and meshing with the planet-gears and the lift-sheave integral with the planet-gear frame, the planet-gears are turned in mesh with the fixed gear, which turns the planetgear frame and the lift-sheave, the latter thus carrying one half of the load, while the other half of said load is sustained at all times by the brake-wheel 35 through the brake-shoe and its connections to the lift-chain. WVhen the hand chain-wheel is turned to the left, the pawl will immediately drop into one of the ratchet-teeth 33 and lock the brake-wheel and the gears together against separate or independent movement. Then by a continued turn of said hand-wheel to the left the Whole of said mechanism thus locked is turned with the planet-gears, turning in the fixed gear to lower the load. Immediately upon stopping the revolution of the hand-wheel the pawl will engage the ratchet-teeth, if it is not already so engaged, and hold the load from dropping. It will thus be seen that the load or weight will be automatically held or suspended at any point to which it may be raised.

I have shown four planet-gears, but this number may be increased or diminished, as desired, in accordance with the size of the machine or driving power required without departing from the spirit of my invention.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with the sun-andplanet gears, the bevel-gears, and the transverse pinion, of means for automatically looking all of the said gears together against separate or independent movement, comprising a brake-wheel a spring-controlled pawl on the brake-wheel and engaging ratchet-teeth of one of the said bevel-gears, and a brakeshoe working on the brake-wheel and attached to the lift-chain, as set forth.

2. Abrake-shoe comprisingaseries of links secured together, certain of the links having V-shaped bearings, the top one of said links having projections to prevent the shoe moving, as set forth.

3. Abrake-shoe comprisingaseries of links secured together in chain form, certain of the links having V-shaped bearings,'the top one of said links having projections to prevent the shoe moving, and the bottom one of said links having a bearing for a swivel-fork by which the shoe is connected to a lift-chain, as set forth.

4. A driving mechanism for chain hoists comprising two bevel-gears loosely mounted on a fixed shaft, a pinion on one of said gears, a transverse pinion in mesh with the bevelgears, the sun-and-planet gears, a lift-chain sheave on the planet-frame, the internal fixed gear with which the planet-gears mesh, and a suitable hand chain-wheel on the shaft of said pinion, as set forth.

5. A driving mechanism for chain hoists comprising two bevel-gears loosely mounted on a fixed shaft, a pinion integral with the hub of one of said bevel-gears, a transverse shaft adapted to be revolved at right angles to the fixed shaft, and having a suitable hand chain-wheel, a pinion on the transverse shaft in mesh with the bevel-gears, the sun-andplanet gears, the internal gear with which the planet-gears mesh, and a lift-chain sheave integral with the planet-frame, as set forth.

6. The combination with the driving mechanism, the frame portion having a journalbearing for the pinion-shaft of said mechanism, and the brake-wheel, of the ring to hold the wheel in position and having a finger engaging the said frame portion to prevent movement of the ring, substantially as set forth.

7. The combination with the driving mechanism, of the keeper-ring having a finger, and a lug forming a bearing for the transverse shaft of the said mechanism, as set forth.

8. The combination with the driving mechanism, the brake mechanism, and the shafts upon which said mechanisms are mounted, one of saidshafts being transverse to the other, of the frame portion to which one of said shafts is fixed and having a j ournal-bearing for the other shaft, the other frame portion having internal gear-teeth forming part of said driving mechanism, as set forth.

9. The combination with the two-part frame, one part forming an internal gear, a transverse pinion carried by the other part and having a hand-wheel, and a shaft fixed to both parts, of the sun-and-planet gear within the internal-gear part, the brake mechanism, the bevel-gears on said shaft, and the lift-chain sheave upon the planet-gear frame, as set forth.

10. The combination with a chain hoist, of a lift-chain keeper having a hook for one end of said chain, a pivot-bearing, curved surfaces, and a groove between said surfaces, as set forth.

11. In a chain hoist, the combination with the driving mechanism, and the brake mechanism, of the planet-gear frame formed integral with the lift-sheave of said driving mechanism, the planet-gears being countersunk and connected to said frame by screw-journals.

12. The combination with the two interlocking frame parts one part of said frame having depending ears, and a shaft to which each part is fixed, of the brake-wheel loosely mounted on said shaft, and the ring covering a portion of said wheel and having a finger engaging the space between the said ears to prevent the ring moving, as set forth.

13. In a brake mechanism for hoisting-ma chines, the combination of the brake-wheel having a spring-controlled pawl adapted to engage ratchet-teeth on the driving mechanism, the brake-shoe composed of a series of links joined together, the top one of which has projections and the bottom one a bearing for a swivel-fork connection to a lift-chain, and a ring upon the hub of the brake-wheel and covering a portion of the periphery of said wheel, a top projection from the periphery of the ring. adapted to engage the projections of the said link, to prevent movement of the brake-shoe, as set forth.

14. The combination with the fixed frame having depending cars, a brake-wheel loosely mounted in said frame, a brake-shoe having top projections, and a bottom swivel connection, of a ring loosely mounted on the hub of said wheel and having a flange covering a portion of the wheel-periphery, a projection or lug extending from said flange over said wheel and between the said shoe projections, and a finger upon said lug and engaging the said ears to prevent the shoe moving, and to keep the swivel in the central vertical line with the brake-wheel, as set forth.

15. The combination with the fixed frame having an internal gear, the bevel-gears, the

IIO

transverse pinion in mesh with the bevel- In witness whereof I hereunto set my hand gears and havingasuitable hand chain-Wheel, in the presence of two Witnesses.

1 I T j v i am. the plmon on one of sald be e1 gems, of JOSEPH XV KINCAID' the planet-frame, the lift-sheave integral with 5 the planet-frame, the planet-gears meshing Vitnesses:

with the said bevel-gear pinion and with the CALEB J. BIEBER, said internal gear, as set forth. I GEO. A. HECKMAN.