US1771959A - Hoisting mechanism - Google Patents

Description

July 29, 1930.

M. P. HOLMES HOISTING MECHANISM Original Filed Jan. 19. 1922 Patented July 29, 1930 ours!) stares ace ' CHINEBY COMPANY, .A CORPORATION OF MASSACHUSETTS I-IOISTING MEGHANISM Application filed, January 19, 1922, Serial No. 530,390. Renewed October 19, 192.8.

My invention nisms. a

An object of my invention is to provide an. improved hoisting mechanism; Another relates to hoisting mechaobject of my invention is to provide a very compact hoisting mechanism with improved.

controlling means therefor. I ()ther objects and advantages of my invention will here-' inafter more fully appear. a

In the accompanying drawing I have shown for purposes, of illustration one form which my invention may assume in practice. i l

In the drawing, I I

The figure is a central vertical section through the illustrative embodiment of my. improved hoisting mechanism with parts" shown iIl'QlQVatiOD. V

For purposes of illustration I have elected to show the illustrative embodiment of my invention as comprising a motor casing 1 which is circular in cross section and in .which there are arranged in communicating bores a pair of intermeshing rotors2 and 3 having spirally disposed tooth blades 4 formed thereon which cooperate upon rotation of said rotors to form expanding tooth pockets andthereby provide for expansion of the motive fluid admitted to said pocketsat their inception. The motorcasing 1 is supported at one end by means of a shank 5 supported in a standard 6, which standard constitutes one end of a main frame 7 at whose opposite end a second standard S is arranged. The 35- standard 8 serves as a mounting for a'reaction member 9 whose function will be hereinafter more fully set forth. Within the member 9 is journaled, in a bearing 10, a shaft 11 secured to the opposite end of the motor housing 1. The shank 5 is keyed within the standard 6 to prevent rotation. The rotor 2 is provided with a shaft 12 projecting through one end of the housing 1 and carrying a driving pinion 13 thereon. The driving pinion 13 meshes with and drives a pinion l4 rotating upon a stub shaft 15 which is arranged parallel to the shaft 11 fixedly upon one end of the motor casing 1. Arranged coaxially with the shaft 11 and rotatable thereon is an internal gear 16 whose teeth mesh with the teethof the pinion 1.4 and which is according 1y driven thereby upon rotation of the rotor; 2. The internal gear 16 isprovided with a sleeve 17 on which spur teeth18 are formed and these teeth are adaptedby meansof.

gears 19'journaled upon stub shafts 2O upon,v

the reaction member 9 to cooperate withinternal gear teeth21-formed upon the interior.

band 24'controlled by manual brake applying' means 25 cooperates, the-brake flange 23, overlying the internal'gear 21; The drum 22 will be noted at its opposite end to have formed thereon a braking surface 27 with which manual braking means 28 cooperates.

The mode, ofopera tion of my improved mechanism as illustrated herein will be readily apparent. Fluid pressure having been admitted tothe rotors2 and 3 by means of a fluid supply passage extending through the shaft 5, the rotors -are caused to rotate in opposite directions. The-rotor 2 then drives the pinion 13 which meshing with the pinion 14 causes the latter to drive the internal gear '16. As a result, the latterflruns at 'a speed considerably slower than the speed of rotation of the rotor 2 and the-sleeve 17 is driven at a corresponding speed. When the brake. band 24 is applied to the reaction member 9 to hold the same against rotation, the teeth 18 will ,drive'thegears 19 and so drive the internal gear 21 and cause the drum 22 to rotate. When it is desired to interrupt the rotationjof the drum, this may be accomplished by applying the manual braking means 28 and releasing the brake band 2 1 under which circumstances the reaction member 9 will be free to rotate and will be caused to rotate as the pinions 19 run around upon the internal periphery of the internal gear 21. It will. thus be seen that I have provided a very compact hoisting mechanism having a stationary motor housed wholly. within the drum and operative to drive. the

drum or by my improved controlling mechanism including the releasable reaction member to continue to operate while allowing the drum to be freely moved with respect thereto.

VVhile'I have in this application specifically described one form which my 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 andembodied 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 1. In a hoisting mechanism, a stationary motor, a rotatable winding drum surrounding the same, a shaft supporting one end of said motor, a pinion rotatable on said shaft,

means including reduction gearing whereby said motor can drive said pinion, means includlng a gear rigidly mounted relative to said drum and a pinion intermediate said gear and first mentioned pinion for driving said drum from said first mentioned pinion, means rotatably supported on the axis of said shaft'for rotatably supporting said intermediate pinion, and means for controlling rotation of said last mentioned supporting means. a

2. In a hoisting mechanism, a stationary motor havin a stationar T casin and rotors g 2:

provided with intermeshing tooth'blades cooperating to form pockets expanding in volume on rotation of said rotors, a drum ournaled directly on said casing and within which said motor lies in such position that its rotors lie wholly between the ends of the drum, and constantly connected operative connections between said drum and motor manually controllable to cause said drum to rotate or to release the latter while said motor is operating.

3. In a hoisting mechanism, a rope winding drum, a motor having a driving gear and a stationary casing, said casing extending into and aifording on its periphery a bearing for said drum, a drum driving gear carried by said drum coaxiallytherewith, driving gearing connecting said motor gear and drum driving gear, said gearing being constantly in mesh, and drive control means for pro-'- ducing rotation of said drum by said gear-- ing and for interrupting rotation of said drum while driving of said motor gear continues.

4. In a hoisting mechanism, a rope winding drum, a motor having a driving gear and a stationary casing, said casing extending into and affording on its periphery a bearing for said drum, a drum driving gear'carried by said drum coaxially therewith, driving gearing connecting said motor gear and drum driving gear, said gearing being constantly in mesh, a rotatable reaction member cooperating with said driving gearing for producing rotation of said drum when the reaction member is held against rotation and interrupting rotation of said drum when the reaction mem ber is released, and means for controlling rotation of said reaction member.

5. In a hoisting mechanism, spaced sup porting members, a rope winding drum, a driving motor supported at one end by one of said members and having a stationary casing disposed at least partially within said drum, said casing afi ording on its periphery a bearing forrotatably supporting said drum, a supporting element extending coaxially with the drum between the other end of said motor and the other of said spaced supporting members. a reaction member coaxial with said drum rotatable about said supporting element, and operative driving connections between said motor and drum including an intermediate pinion carried by said reaction member. 7

6. In a hoisting mechanism, a rope winding drum, an internal gear disposed coaxially with said drum and secured thereto, a driving element disposed within said drum, a reaction member rotatable on the axis of said drum and having a flange overlying said internal gear with a, common bearing therebetween, driving connections between said driving element and said internal gear including a gear meshing with said internal gear and carried by said reaction'member, and means for controlling said reaction member.

7. In a hoisting mechanism, a motor hav ing a stationary casing, means secured to said casing at the opposite ends thereof and extending therefrom for supporting the motor, a drum surrounding said motor, and driving connections between said motor and drum including a reaction member adapted when released to rotate without the drum being driven and when held to produce rotation of the drum, a gear carried by said reaction member and rotatable on an axis offset from the axis of rotation of said member, and means for v controlling said reaction member. i

8. In a hoisting mechanism, a motor having a driving pinion and a stationary casing, a drum journaled on the periphery of said casing, the axis of said driving pinion being ofl'set from the axis of said drum, and driving connections between said pinion and said drum including a gear arranged coaxially with said drum, a reaction member rot-atably supported on the drum axis and adapted when released to rotate without the drum being driven and when held to produce rotation of the drum, and a gear carried by said reaction member and meshing with the gear arranged coaxially'with said drum.

9. A hoist comprising a drum, a driving motor having a driving pinion and a drive shaft carrying said pinion within said drum, said shaft being rotatable on an axis offset motor having a driving pinion and a drive shaft carrying said pinion within said drum, said shaft being rotatable on an axis offset from the axis of the drum, and driving connections between said pinion and drum including a pair of gears secured together, a gear meshing with one of said pair and movable orbitally about the of the drum, means for rotatably supporting said pair of gears for rotation on the axis of the drum,

and drive control means comprising a reaction member carrying said orbitally movable gear, said reaction member being rotatable about'the drum axis and adapted when re leased to rotate without the drum being driven and when held to produce rotation of the drum.

11. In a hoisting mechanism, a motor having a stationary casing and a stationary member projecting from an end of said cas,

ing, means cooperating with said member for supporting said casing, a drum journaled on said motor casing, said stationary member extending coaxially with said drum, driving connections between said motor and said drum including a gear rotatably carried by said stationary member for rotation on the axis of the drum, a second gear meshing therewith, and a member for rotatably supporting said second mentioned gear, said gear supporting member being mounted for rotation about the axis of and relative to said drum, and means for controlling rotation of said gear supporting member. 7

12. In a hoist, a motor having a stationary casing and a driving pinion, a rope winding drum journaled on said casing with one end projecting and surrounding said pinion, and driving connections between said pinion and said drum including a reaction member rotatably supported on the axis of said drum and adapted when released to rotatewithout the drum being driven and when held to produce carried by said reaction member and rotatable relative thereto, said reaction member having an annular bearing surface cooperating with the projecting end of said drum. 13. In a hoist, a motor having a stationary casing and a driving pinion, a rope winding drum journaled on said casing with a proj ecting portion surrounding said pinion, and driving connections between said pinion and said drum including an internal gear formed within the projecting portion of said drum, a

reaction member rotatably supported on the axis of said drum and adapted when released to rotate without the drum being driven and when held to produce rotation of the drum, anda gear carried by said reaction member and meshing with said internal gear, said reaction member having an annular flange provided with a bearing surface cooperating with the projecting end of said drum.

14. A hoist comprising a drum, a driving motor having a driving pinion and a drive shaft carrying said pinion within said drum, said shaft being rotatable on afixed axis ofiset from the axis of the drum, and driving connections between said pinion and drum including a pair of gears secured together and a gear meshing with one of said pair and orbitally movable about the axis of the drum,

means rotatable relative to the drum for supporting said orbitally movable gear for orbital movement, and means for rotatably supporting said pair of gears on'the axis of the drum. v

In testimony whereof I aflix my signature.

. -MORRIS P. HOLMES.

rotation of the drum,and a gear I

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