US1596477A - Hoist - Google Patents

Description

Aug. 17 1926.

- R. H. BEI-:BE

' HOI ST Filed NOV.

26, 1924 4 Sheets-Sheet 1 INVENTOR ZZ. 566026, Y//Qw AoRNEYs Aug. 17 1926.

R. H. BEEBE HOIST Filed Nov 26, 1924 4 Sheets-Shea?I 2 ATTORNEYS Aug. 17 1926. 1,596,477

R. H. BEEBE Hos'l4 4 Sheets-Sheet 4 Filed Nov. 26, 1924 ATTORNEYS Patented Aug. i 17, 1926-.

UNITED STATESv PATENT OFFICE.

ROBERT H. IBEEBE, OF SEATTLE, WASHINGTON.

HOIST.

Application led November 26, 1924. Serial No. 752,421.

This invention relates'in general to hoists and more particularly to' a hand-operated hoist.

Thecbject of the invention is the provision of a hoist of this character which provides a maximum drum capacity and the necessary and desirable range in speed and power in an easily and readily controllable machine.

Another object resides in the provision of a hoist having the capacities and advantages hereinabove set forth and which is also so constructed and organized as to provide for 1 maximum safety in operation along with the development of the necessary degree of power in an organization which is'- of comparatively light weight and which requires but a minimum of space.

.A further object is the provision of 'a hoist of the character specified and wherein the operator may easily and readily exert an effective and quickly responsive braking control on the hoist. f

A still further object resides in the provision of a hoist which is so mounted that its position may be adjusted to well adapt it tol meet varying conditions and which also may be readily moved out of the way when. not in use and when the space which it normally occupies is required for other purposes.

Other objects and advantages reside in certain novel features of the construction,

arrangement and combination of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming a part of this specification, and in which:

Figure l is a view in side elevation showing one embodiment of the invention,

Figure2 is al plan view ofthe hoist'shown in Figure 1, the internal ring gear being shown'in section,

Figure 3 is a view partly insideelevation and partly in 'vertical' section, the large gear wheel and the hand operated pinion being removed to illustrate the braking,

mechanism,

Figure 4 is a view in section on the line 4-4 of Figure 3,

Figure 5 is a fragmentary sectional view on the line 5-5 of Fig. 1,

Figure 6 is a fragmentary view in section on the line 6-6 of Fig. 5,

'groove 15 provided in the outer Figure 7 is a fragmentary view in section on the line 7 7 of Fig. 1,`

Figure 8 is a fragmentary perspective view of the brake operating cam,

Figure 9 is a similar .view of the pawl and its mounting, v

Figure 10 is a detail perspective view of the pin employed for constraining the driving shaft to rotary movement,

Figure 11 is a top plan view of the anchor plate,

Figure 12 is a bottom plan view thereof,

llgure 13 vis a view of the carrier plate, an

Figure 14 is a view in central longitudinal vertical section through the carrier and anchor plate assembly.

Referring to the drawings it will be seen that the hoist includes a side plate or frame, designated generally at l and a side plate or frame,A designated generally at 2, the side plates being vertically disposed and being held in spaced parallel relation by transversev rods 3 secured at their ends to the side plates.

A hoist drum, designated generally at 4, is provided 4and comprises aA hub 5 having integral cheek plates 6 and integral trunnions 7, the trunnions 7 being rotatably fitted in bearings 8 provided therefor in the side plates 1 and 2.

One of the cheek plates 6 of the drum 4 is provided with an outwardly directed mar'- ginal flange 9 formed with an internal gear 10.

A hollow driving shaft 11 is provided and is rotatably mounted in a bearing 12 provided therefor on the side plate 1. The shaft 11 is held against axial movement by means of a pin 13 which extends down through a vertical opening provided thereforA in a lug 16 integrall formed with`the bearing and alsodown t rough an opening provided in the bearin itself. The pin 13 has a reduced end 14 tting in an annular periphery of the hollow shaft 11, as shown in Fig. 5. The pin 13 is held against displacement by a cotter pin 15 which is extended through a veo with the outer end of the drive shaft and is made up of a web 19 and a rim 20 having gear teeth 21 formed thereon (see F1g. 5).

A handle operated pinion 22 is provlded and as shownto advantage in Fig. 7 is formed with an integral stud shaft 23 adapted to be fitted in a bearing 24 formed on the side plate 1 and when the pinion 22 is mounted on the bearing 24 by means of the stud shaft 23 its teeth mesh with the teeth 21 of the large gear wheel. The handle operated pinion 22 is formed with a head 25 which is provided with a transverse slot 26. A handle 27 has one end fitted in the slot 26 and the handle is held in the slot into the head by a set screw 28. A rivet 29 is provided on the handle to prevent its entire disassoeiation from the head 25 of the pinion but the set screw 28 enables the handle to be adjusted in the slot and to be secured in adjusted position. When the pinion 22 and large gear wheel 18 are operatively associated a compound gear ratio of 24 to 1 is obtained, which is ample for handling loads up to five tons. ln order to provide for the rapid lift of loads up to fifteen hundred poundsthe outer end of the drive shaft 11 is formed with a socket 30, (see Figs. 1 and 5), the wall of which is provided with alternate recesses and projections, designated at 31 and 32, respectively, and designed to interfit with the teeth of the pinion 22. inwardly of the socket 30 the inner peripheral wall of the hollow drive shaft 11 provides a bearing 30a for the stud shaft 23. Of course, it is to be understood that the pinion 22 lis designed to selectively associate with either the large gear/wheel or with the socket. ln Fig. l of the drawings the handle operated pinion is shown in 'full lines as associated with the large gear wheel and is shown in dotted lines as associated with the socket. rlhe handle operated pinion when associated with the socket is geared to the hoist drum with a gear ratio of 4 to 1 which is ample for lifting and handlin light loads rapidly.

In or er to prevent retrograde movement of the gear wheel 18 and consequently retrograde movement of the drum when lifting the load so that the load may be held in any position, a pawl 33 is provided and is de'- signed to coact with the teeth 21 of the gear wheel 18 (see Figure 1). The pawl 33 is mounted for pivotal movement on a pivot pin 34 (see Figs. 7 andA 9) and is springpressed into engagement with the teeth 21 by means of a retractile coil spring 35 having one endconnected to the pawl and having its opposite end connected to the side plate 1. The pivot pin 34 is mounted in a earing 36 provided on the side late 1 and it projects inwardly beyond the Bearing for a purpose that will hereinafter appear. A cotter pin 37 eo-acts with the bearing 36 and eration of Fig. 2 the coil spring 35 not only l with the pin 34 to hold the Pin against rotary and axial movement.n The angular movement or throw of the pawlo 33 is normally limited by means of a pair of stop lugs 38 provided on the bearing 36 and co-operable with a stop pin 39 projecting laterally from the pawl 33 and operating between the lugs 38. lf it is desired to permit the hoisting drum to lower the load or pay out the line wound thereon the pawl 33 may be moved and held out of-engagement with the teeth 21 (see Fig. 3) since the pawl 33 is mounted for-longitudinal shiftingmovement on the pivot 34 as well as for angular movement. Consequently the pawl 33 may be shifted along the pin 34 to the left as shown in Figs. 7 and 9 to permit the pin 39 to clear the lugs 38 so that the pawl 33 may be rotated to the position shown in Fig. 3 and then moved inwardly to engage the piny 39 with the lowermost lug 38. A head 40 on the pin 34 prevents accidental disassociation of the pawl 33 and pin 34. After the paying out of the line on the hoisting drum has been completed the pawl 33 lmay be readily shifted back to engagement with the teeth As will be understood from a considtends to throw the pawl into engagement with the teeth of the large gear but also tends to hold the pawl in such position as to position the pin 39 to co-act with the lugs 38.

As shown to advantage in Fig. 5 the rim 20 of the gear wheel 18 extends inwardly beyond the gear teeth 21 and the internal surface of this rim is utilized as a brake drum. A brake shoe, designated generally at 41, is provided for co-action with the brake drum thus provided and this brake shoe includes a metallic carrier 42 to which a facing 43 is applied. rlhe carrier and facing are shaped and formed so as to contact withy the brake drum throughout the extent of the shoe when the shoe is thrown to engage the brake drum. The brake shoe 41 is mounted on a pivoted or swingable arm 44, an offset end of which arm is integrally formed with the metallic carrier 42, as shown to advantage in Fig. 2. The end of the arm 44 opposite or remote from its connection with the metallic carrier 42 is formed with a bearing 45 in which the pivot pin 34 is tted (see Figs. 2 aand 9). A cotter pin 46 prevents displaoement of the bearing 45 off the end of the pivot pin. vIt is to be noted that the arm 45 is of greater length than the radius of the rim '20 which lprovidesy the brake drum and that this arm is pivotally mounted externally of the brake drum. An operating lever 47 is provided Ifor controlling the engagement of the brake shoe with the brake drum. The inner end of the lever 47 is formed with a small cam 48 which lits in a hearing 49. provided at the central lower portion of the brake shoe. On each side of the small cam 48 large cams 50 are provided. The undersides of the cams 48 and 50 are fiat and when the brake is in non-braking or inoperative position these flat undersides of the cams rest on the top of the bearing 12 as illustrated to advantage in Fig. 6. When the outer end of the lever 47 is pulled upwardly the lever is rotated in a counterclockwise direction as viewed `in,l"igs. 3 and 6 to bring the camming faces 51 of the largecams 50 into contact with the top of the bearing 12 and to bring the camming face or eccentric portion 52 of the small cam 48 into contact with the bearing 49 to .forcibly elevate the brake shoe into contact with the brake drum. With this braking mechanism it is to be found that the lever 47 is self-locking and will remain set to hold the brake shoe 41 operatively engaged with the brake drum even under heavy load. At the same time the lever 47 may be readily released. A projection 53 is provided on the brake shoe to prevent ac cidental movement of the lever 47 to position to urge the brake shoe into engagement with the brake drum. This projection, however, does not interfere with the movement of the lever 47 by the operator.

The hoist hereinabove described is mounted on a platform and when in use is located on the top of the plat/form, as shown in Fig. 3. In order to control the angular position of the hoist on the platform and also to permit the hoist to be swung from the position shown in Fig. 3 down over the edge of the platform when it is founddesirable to use the space on, the platform for other purposes an anchor plate 61 is .bolted on the platform by bolts and nuts 62, the heads of the bolts being countersunk in the plate 61. A depending fiange 63 is integrally'formed with the anchor plate and is also fastened to the edge of the platform. A carrier 64 is positioned on top ofthe anchor plate 61. This carrier plate is formed with a depending boss 65 which is rotatably fitted in a socket 66 formed in the anchor plate. A pivoted bolt 67 is inserted through an opening provided in the bottom of the socket 66 and is threaded into the boss 65 so that the carrier Slate may be rotated or angularly ad- ]uste on-the anchor plate. In order to hold the carrier plate in adjusted positiononthe anchor plate the anchor plate is provided with an arcuate series of hotches 68 and the carrier plate has a depending tongue 69 designed to be selectively inserted in any one of the notches 68. The bolt 67 must be loosened up to disengage the tongue 69 from the notch in which it has been fitted. An upwardly inclined finger piece or lug 70 is integrally formed with the carrier plate to facilitate the manipulation thereof. The carrier plate 64 is provided with transverse ribs 71 defining a channel and at each end the ribs are connected to provide bearings 72. A shaft 73 is journaled in the bearings 72 and projects beyond the bearings into bearing sockets 74 provided in the side plates 1 and 2 of the hoist. When the hoist is positioned on the platform for use and its angular adjustment has been determined it is bolted down to the platform by means of bolts and nuts 7 5 which co-act with the platform and lwith apertured ears 76 provided on the side plates. With this arrangement when the bolts and nuts have been released the hoist may be swung over the edge of the platform and hangs down out of the way. 7

I claim:

1. In a hoist, a frame, a drum rotatably mounted on the frame, an internal ring gear fiXedly connected to the drum, a driving shaft rotatably mounted on the frame, e pinion fixed on said shaft and meshed with the internal gear, a large gear wheel also fixed to the shaft, said shaft having a socket formed in its outer end and provided with a series of alternate recesses and projections, a handle operated pinion selectively engageable with the recesses and projections of the socket and with the teeth of the large gear wheel, said handle operated pinion having a stud shaft lixedly connected thereto, said drivingshaft having a bearing 'at the inner end of the socket into which the stud shaft may be tt'ed to mesh the handle operated pinion and the recesses andaprojections of the socket, the frame also havlng a bearing into which the stud shaft may be fitted to mesh the handle operated pinion with the large gear.

2. In a hoist, a frame, a hoisting drum rotatably mounted on the frame, an internal ring gear fixedly connected to the drum, a driving shaft rotatably mounted on the frame, a pinion Xed on the shaft and meshed with the internal gear, a large gear wheel also fixed on the shaft and including a web having a. rim provided on its outer portion with gear teeth and having its inner surface constituted to provide a brake drum,

a brake shoe co-operable with the brake drum and including a metallic carrier havin a brake facing applied thereto, the meta lic carrierand the brake facing being shape-d to contact with the drum throughout the extent of the shoe when the shoe is thrown to engage the drum, an 'arm having an offset end integral with the carrier, means for pivotally mountin the arm externally of t e drum and on the frame of the hoist and operating means for said brake shoe.

3. In a hoisting frame, a hoisting drum rotatably mounted on the frame, -an internal ring gear fixedly connected to the drum, a.

driving shaft rotatably mounted on the frame, a pinion Xed on the shaft and the other end of4 iso meshed With the internal gear, a large gear Wheel also fixed on the shaft and including a web having aprim provided on its outer portion with gear teeth and having its inner surface constituted to provide a brake drum, a brake shoe` co-operable with the brake drum and including a metallic carrier having a brake facing applied thereto, the metallic carrier` and the brake facing being shaped to contact With the drum throughout the extent of the shoe When the shoe is thrown to engage the drum, an arm having an oii'set end integral with the carrier, means ,tor pivotally mounting the other end of the arm externally of the drum and on the Jframe of the hoist and operating means for said brake shoe, said operating means including an operating lever having cams 'co-operable With the frame, and a cam cooperable With the carrier of the brake shoe.

4. ln a hoist, a frame, a hoisting drum mounted on the frame, a brake drum constrained to partakel of movement correspond` ing to the movement of the hoisting drum, a brake shoe co-operable With the brake drum and including a metallic carrier having a brake facing applied thereto, the metallic carrier vand the brake facing being Ashaped to contact With the drum throughrescatar out the extent of the shoe when the shoe is thrown to engage the drum, an arm having an odset end integral with the carrier, means for pivotally mounting the othery end of the arm externally of the drum and on the frame of the hoist and operating means for said brake shoe, said operating means including an operating lever having cams co-operable with the frame, and a cam cooperable With the central portion of the carrier of the brake shoe.

5. A hoist comprising a frame, a drum rotatably mounted on the frame, gearing for driving the drum, said gearing including a gear Wheel having -a centrally located socket and also havingea bearing inwardly of the socket, said frame having a bearing adjacent the periphery of the gear Wheel, i

and a handle-operated pinion having a mounting lstud selectively co-operable With the bearings of the gear Wheel or frame whereby the pinion is shiftable from a geardriving position to a central clutching position, said gear Wheel having means in its socket engageable with the pinion when the same is in central clutching position to posi- 55 tively connect the pinion and the gearing.

ROBERT H. BEEBE.

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