US1490689A - Hoisting machinery - Google Patents

Description

April 15 1924. 1,490,689 c. w. AVELING HOISTING MACHINERY Filed Jan. 1a, 1919 sshets-sheet 1 c. w. AVELING aorswmq momma? Fil ed Jan.

April 15 1924.

1a 1919 's Sheets-Sheet 2 April 15 1924- 1,490,639

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Filed'Jan. 1a. 1919 a sheetwmz 8 w rzwfiior WWW I Patented Apr. 15, 1924.

I UNITED STATES teases sare;at @FHCE.

CHRISTIAAN w. Avn tine, or stem, ILLINOIS, nssrenon T Jena AVEL11IG,OF

nooxeoa's, ILLINOIS.

HOISTIHG MACHINERY.

Application filed January 18, 1919. Serial at. 271,778.'

To all whom it may concern:

Be it known that I, CHRISTIAAN Avnt- ING, a citizen. of the United States, residing at Elgin, in the county of Kane and State of Illinois, have invented new and useful Improvements in Hoistiu g Machine y, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to hoisting machinery, and, more particularly, to hoisting machinery for use with a grab-bucket.

One of the objects of my invention is to provide an improved construction in which a single motor will control both the opening and the closing of the bucket and also the hoisting and lowering thereof.

A further object of my invention is to provide an improved construction which will be extremely simple, light, and compact, and which will be durable and eflicient in use.

Further objects will appear from the detailed description to follow, and from the appended claims.

In the drawings, in which one; embodiment of my invention is shown- Figure 1 represents a'plan View, partly in section, of a trolleyhoist embodying my invention;

Fig. 2 is aside elevation of Fig. 1;

Fig. 3 is a section on the line 3-3 of Fig. 1;

Fig. 4; is a section on the line 4-4: of Fig. 1;

Fig. 5 is a perspective view of a helical cam forming part of the holding brake mechanism; and 1 Fig. 6 is a perspective view of a collar forming part of the delayed-action mech anism.

In my invention I provide a construction whereby a single motor controls both the lacing rope and the holding rope; I accomplish this result by providing delayed -action mechanism, whereby the drum which con trols the lacing rope can be given a predetermined amount of rotation before the drum which controls the holding rope is caused to rotate at all. Thus, the drum which controls the lacing rope can be given a sufficient amount of rotation to close the grab-bucket, after which, by means of the delayed-action mechanism, the drum which caused to rotate at all, so that the holding rope Wlll'llOlCi the bucket in position while the lacing rope is slacked up suiiicieutly to permit the contents of the bucket to be dumped. After the bucket is dumped, the delayed-action mechanism comes into operation to cause the drum which controls the holding rope to operate, and after that both drums are rotated together to permit the bucket to be lowered.

Referring now to the drawings in detail, the hoisting mechanism shown comprises a hoisting trolley 10 (shown as mounted to travel on a track 11), and a grab-bucket 1:2 which may be of any usual type and is controlled by means of the lacing rope 13 and the holding rope 1 1. I

The lacing rope 13 controls the opening and closing of the grab-bucket, and the hold ing rope 14 assists in raising and lowering the bucket and holds it in position while the lacing rope 13 is slacked to permit the contents of the bucket to be discha k, -d. A certain definite movement the lacing rope is necessary both inopening a. d in closing the bucket. Thus. assuming that thebucket is open. and it is desired to close it and hoist the bucket, the lacing rope 13 would be wound up a certain d stance, the holding rope 14: meantime not being wound up until the grab-bucket is closed after which both the lacing rope 13 and the holding rope 1 1 will be wound up to hoist the bucket.

, Similarly, assuming that the loaded bucket has been raised to the position where it is desired to dump it, the lacing rope 13 is unwound a certain definite amount, sulficient to permit the grab-bucket to open, the holding 101 e 1 1 meantime not being un wound at all, until the bucket is completely opened, after which both the lacing rope 13 and the holding rope 1 1 are unwound, permitting the grab-bucket to be lowered. Grabbuckets which can be thus operated are old .in the art and need not be described in detail.

Referring now in detail to the hoisting trolley, this comprises a carriage 15 mountto travel on the track 11, a lacing drum 16 for controlling the lacing ropeg13, a holding drum 17 for controlling the holding rope 1 1, a hoist-motor 18 for controlling both'the lacing drum 16 and the holding drum '17, transmission means 19 between the motor 18 and thelacing drum 16, and delayed-aetion transmission means 20 betweenthe lacing drum 16 and the holding drum 17, and hold ing-brake mechanism 21 for holding the grab-bucket while the lacing rope is slaclred to permit the bucket to be dumped.

The lacing drum 16 is secured to rotate with the lacing-drum shaft 22 which is rotatably mounted in suitable bearings 23, 24, and The holding drum 17' is secured to rotate with the holding-drum shaft 26 one end of which is mounted in suitable ' bearings 27 and 28 of the trolley side, and

the other end of which is journaled in a sleeve 29 (which sleeve forms part of the transmission 19 between the hoist motor and the lacing drum 16).

The transmission 19 between the motor 18 and the lacing drum 16 comprises amotor pinion 30, a large gear 31 meshing with the motor-pinion and secured to rotate with the sleeve 29 (previously, referred to), a pinion 32 which may be formed integral with th sleeve 29, and a large gear 33 meshing with the pinion 32 and keyed to the lacing-drum shaft 22. I

Before describing the delayed-action transmission between the lacing drum 16 and the holding drum 1?, I shall first describe the holding-brake mechanism 21.

'This comprises a ratchet-wheel 34 Con brake-disk and gear 37 (said bralreclisk and ratchet-wheel 34 having (o-operating braking surfaces) and a helical cam 38 rotatable withthe shaft 26 and having a helical face 39 for engagement with a corresponding helical face on the hub of the brake-disk 37.

The pawl 35. is thrown into engagement with the ratchet-wheel 3 1 on unwinding movement of the holding drum 1?, and is thrown out of engagement with the ratchetwheel 3' 1 on winding-up movement of the holding drum 17, by means of a friction collar 40 (Figs. 1 and 8) which frictionally engages the hub of the brake-disk 36 and which is connected with the pawl hy means of a link 11 pivotally connected to the collar at 4-2, and pivotally connected'at its other end at 4:3 to an arm se -which may be formed integral with the hub of .the pawl 35, the hub of this pawl being pivotally mounted on a pin 45. The collar l0 is frictionally held in engagement with the hubof the brake-disk 36 by means of a pair of springs 16 arranged to draw the mating sections of the collar d0 into snug engagement with the hub.

' The inclination of the helical cam 39 is such that a downward force exerted on the holding rope 14 will force the helical cam 39 tightly into engagement with the corresponding helical surface of the hub of the brake-disk 37, forcing the latter tightly over against the braking surface oi" the ratchet. 341 and pinching the ratchet-wheel t-l-l tightly between the brake-disks 36 and 2:7, is the ratchet cannot rotate in a direction corresponding to an unwinding movement of the holding drum 17, it will hold the holding drum against rotation due to any downward pull on the holding rope 1 1. V The delayed-action transmission between the lacing-drum shaft 22 and the holdingdrunr shaft 26 comprises an externallythreaded sleeve n feathered on the lacingdrum shaft 22 as indicated 47 a collar E8 adjustably secured to the sleeve 17 and having a shoulder 19 on face (Figs. 1 and 6) for engagement with a corresponding shoulder on the hub of aigear 51 (the gear 51 being internally threaded for engagement with the external thread on the sleeve 5), a collar 52 similar to the collar a fus' blv secured on the externallyd threaded sleeve 4?- anc having a shoulder 53 on one face. for engagement with a corresponding shoulder 54; on the hub of the gear 51,' and the combined brake-disk and gear 37 previously referred to.

1 will now describe the operation of. the

struction. The purpose of the delayed-ac tion transmission is to permit a predetermined amount of rotation o't'the lacing-drum shaft 22 before any rotation of the holding drum shaft 26 is effected. i-lssuming, then. that the n'iotor 18 is put in operation to cause rotation of the lacing-drum shaft 22. this will cause a correspondingrotation of the cxternally-threaded slee e 1-7, which will. as V result, cause the sleeve 47 to threaditself through the internally-threaded hub of the gear 51. i As the lilClIlg-(lllll'i! sha t 22 continues to rotate, the sleeve 45? continues to thread itself through the hub of the gear 51 until the shoulder 49 comes into engagement with the shoulder 50 on the hub of the gear'51. When this takes place. it causes the gear 51 to rotate with the collar 19 and shaft 22 and as a consequence causes the combined brake-disk and gear 37 to rotate.

Assuming that the lacing drum 16 is rotating in Va winding-up: direction, the re- 37 will be such as to force the-helical face of the hub of this gear into engagement with the helical cam 39, thus wedging the braking surface of the bralredisl: 37' over against the braking surface otthe ratche 334; and pinching tne ratchetnvhcel 34H etwcen the braking SJ'llilCBS of thebrake- wlisks 36 and 37. Asa result, the combined brakedisk and gear 37, the ratchet-wheel 34, the bralmdislr 36, and the holding-drum shaft 26 will all. rotate together. A continued rotation of the lacing-i in shaft 22 will thus cause a orres iondingrotation of the holding-drum shaft 26 and both the lacing rope l3 and the holding rope 14: will be wound up to raise the grab-bucket 12. V

Similarly, assuming that the grab-bucket is full and is in raised position and it is desired to dump it and then lower it, the motor 18 is put into operation in direction to cause an unwinding movement of the lacing drum 16. This will cause a correspoi1ding rotation of the externally-threaded sleeve 4t? which, as a result, will start to thread itself through the internally-threaded hub of the gear 51. The sleeve l7 will continue to thread itself through the hub of the gear 51. until the shoulder 53 of the collar 52 comes into engagement with the shoulder 5& of the hub of the gear 51. However, when the engagement of the shoulders and 54. takes place, a continued rotation of the sleeve l7 and the collar 52 will cause a corresponding rotation of the gear 51 to cause a movement of the gear 87 in a direction the jreverse 'of' the winding-up movement of the holding drum 17. f The inclination of the helical cam 39 is such that the just-described rotation of the gearB? will cause the helical face of the hub of the gear 37 to draw'awayfrom the helical cam 39, which will permit the brakedislrs 36 and 37 to release their hold on the ratchet-wheel 34: and permit the holding drum 17 to rotate in a direction to allow the grabdiucket 12 to be lowered by its own weight. b i V The rotation of the lacing drum 16 which takes place prior to the rotation of the holding drum 17 is just sufficient to permit the grab-bijicket 12'to open properly to discharge its contents, after which both drums rotate together to lower the bucket. Similarly, in hoisting, the rotation of the lacing drum 16', which takes place prior to the rotation of the holding properly close the grab-bucket, after which both the lacing drum 16 and the holding drum 1? are rotated to raise thegrab-bucket. The amount of rotation ofthe lacing drum 16 which takes placeprior to the rotation of the holding drum 17 may be controlled by adjusting the collars 48 and 52 on the sleeve 4-7, for which purpose the collars 48 and 52 have threaded engagement with the threadt-whecl hold the gear in position drum 17 is just enough toed collar 47 and may be held in various positions of adjustment thereon by means of the keys 55. I

Up to the time the engagement of the shoulders 53 and takes place, the holding drum will be held against movement by the pawl which will be thrown into engagcment' with the ratchet 36 by the first slight backward rotation of the holding drum shaft 26, as previously described. This holds the holding drun'i against downward movement, as any downward pull on the holding rope simply jams the combined gear andbrake member 37, over against the ratchet brake wneel 3st, causing the ratchet wheel 34 to be clamped firmly between the members 36 and 37, thus holding the holding drum shaft 26 against rotation.

The operation of the transmission mecha nism 19 between the motor 18 and the lacingdrum shaft 22 is as follows: The motorpinion 30 drives the large gear 31, which causes the sleeve 29 to rotate and with it the pinion which drives the large gear 33 keyed tothe' lacing-drum shaft 22. As

previously stated, the holding-drum shaft 26 is journaled in the sleeve 29 which connects the large gear 81 and the pinion 32, and this sleeve29 is in turn journaled in suitable bearing 56 in the trolley-side Any suitable magneticbrake 57 may be provided for the motor 18. This magnetic brake is thrown on automatically when the current is shut off from the hoist motor, in the usual manner of magnetic brakes." This of course holds the lacing drum 16 against movement when the currentis shut off from the motor, and preventsthe bucket from dumping before the operator is ready, that is, before he reverses the motor to unwind the lacing rope.

By my improved the necessity of separate motors for the holdingdrum and lacing drum, and secure an extremely light and compact construction. o

The gear 51 is held against sidewise movement in either direction by meansof two cup-shaped members 57and 58, respectively, one on either side of said gear and having portions abutting the web of said gear to These cup-shaped members may be used to form an oil reservoir to keep the enclosed parts bathed in oil.

construction I avoid I claim as new and desire to secure by Letters Patent of the United States:

1. hois machine comprising a re leasable grasping device, two drums for controlling they'o 'ieration of said grasping device, one of said drums serving as a lacingdrum to control the grasping and releasing of said device, and the other drum serving as upholding drum when the grasping device is being released, a single motor for controlling both of said drums, means including a de- 4; V 7' naeopeo layed action transmission whereby said lacleasable grasping device, two drums for'con- (rolling the operation of said grasping dv vice, one of said drums serving as a lacing drum to control the grasping and releasing of said device, and the other drum serving as a holding drum when the grasping device is being released, a single motor for controlling both of said drums, means including 7 a delayed action transmission whereby said lacing drum may be operated without operating said holding drum to cause the graspmg and releasmg operatlons, and an autoing and releasing operations, and an automatically acting brake for holding said holding drum against movement when the lacing drum. is releasing the load-grasping device, and means whereby said automatic brake will be released after the load-grasping device has been released, to permit the holding drum to be operated to lower the load- 7 grasping device.

3. A hoisting machine comprising a re leasable load-grasping device, two drums for controlling the operation of said grasping device, one of said drums serving as a lacing'drum to control the grasping and releasing of said device, andthe other drum serving as a holding drum when the grasping device is being released, a single motor for controlling both of said drums, means including a delayed action transmission whereby said lacing drum may beoperated without operating said holding drum to cause the grasping and releasing operations, and an automatically acting brake concentric with said holding drum for holding said holding drum against movement when the lacing drum is releasing the load-grasping device. 7

4. A hoisting machine comprising a releasable grasping device, two drums tor'controlling the operation of said grasping device,'one of said drums serving as a lacingdrum to control the grasping and releasing of said device, and the other drum serving as a holding drum when the grasping device is being released, a single motor for controlling both of said drums, means including a de layed action transmission whereby said lacing drum may be operated without operating said holding drum to cause the grasping and releasing operations, and an automatically acting brake for holding said holding drum against movement when the lacing drum is releasing the load-grasping device, said brake comprising a member which rotates on the raising movement of the holding drum and is automatically held against movement on the lowering movement of the holding drum, having an impositive connection with the holding drum.

5. A hoisting machine comprising a releasable grasping device, two drums for con trolling the operation otsaid grasping .device, one of said drums serving as a lacingorum to control the grasping and releasing of said device, and the other drum serving as a holding drum when the grasping device is being released, a, single motor for controlling both of said drums, means including a delayed action transmission whereby said lacing drum may be operated without operating said holding drum'to cause the graspmatically acting brake for holding said holding drum against movement when the lacing drum is releasing the load-grasping device, said brake comprising a member -which rotates on the raising movement .of the holding drum and is automatically held against movement on the lowering move ment of the holding drum having an impositive connection with the holding drum and with the motor. i

6. A' hoisting machine comprising a releasable grasping device, two drum for con trolling the operation of said grasping device, one of said drums serving as a lacingdrum to control the grasping and releasing of said device, and the other drum serving as a holding drum when the grasping device is being released, a single motor for con trolling both of said drums, meansineluding a delayed action transmission whereby said lacing drum may be operated without operating said holding drum to cause the grasping and releasing operations, and an automatically acting brake for holding said holding drum against movement when'the lacing drum is releasing the load-grasping device, said brake comprising a member rotatable with the holding drum on the raising movement and automatically held against rotation on the lowering movement of the holding drum,;friction means be tween the :held member and the holding drum for preventing movement of the holding drum during dumping of the bucket and means whereby said frictional holding means are released by continued lowering movement after the bucket is dumped.

In witness whereof, I have hereunto subscribed my name.

CHRISTIAAN lV. AVELING.

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