US1543856A - Double-drum hoist - Google Patents

Description

June 30, 19251 1,543,856

E. B. LEAR DOUBLE DRUM HOIST Filed March 18 v 1924 INVENTOR Earl B.Leav.

76W m5 ATT NEY Patented June 38, 19.25.

a I i UNITED STATES PATENT EARL B. LEAR, OF PHILLIPSBURG, NEW JERSEY, ASSIGNOR TO INGER-SOLL-BAND COMPANY, OF JERSEY CITY, NEJV JERSEY, A CORPORATION OF NEW JERSEY.

DOUBLE-DRUM HOIST.

Application filed March 18, 1924. Serial No. 699,988.

secured to the cylinder by the cap bolts H and fluid pressure, as for instance compressed air, is supplied to the motor through the inlet ,J controlled by a suitable valve K in the valve chest L, and manipulated by the valve lever O. In this instance, the motor is assumed to be a reversible motor,

To all whom it may concern:

Be it known that I, EARL B. LEAR, a citizen of the United States, and a resident of Phillipsburg, county of Warren, and State of New Jersey, have invented a certain Double-Drum Hoist, of which the following is a specification accompanied by drawings. 7

This invention relates to hoists but more particularly to an improved clutch mechanism for a power driven hoist of the double drum type, in which either drum may be driven from a common driving shaft.

In some respects, this invention is an improvement on the double drum hoist de scribed and claimed in United States Patent No. 1,421,183, granted to Jesse Ditson on June 27, 1922. By means of this invention, the clutch mechanism is moved to drive one or the other of'the drums, in accordance with the direction of rotationof the driving shaft.

The objects of this invention are to produce an improved clutch mechanism for double drum hoists, so as to insure the engagement of the clutch mechanism with one or the other of the drums, in accordance with the direction of rotation of the driving shaft.

Further objects of the invention will hereinafter appearand to these ends the invention consists of the hoist described and claimed in this specification, and shown in one of its preferred forms in the accompanying drawings, in which Figure 1 is a longitudinal sectional elevation of the double drum hoist,

Figure 2 is a transverse section taken on the line 2 2 of Figure 1 looking in the direction of the arrows, and, I

Figure 3 is a perspective view of the pawl and guide member.

Referring to the drawings, the base plate A on which the hoist'is mounted is provided with a clamping-member preferably in the form of a saddle member B having clamping bolts C for securing the hoist to a column, cross bar, or other support. Any suitable motor may be provided for the hoist, and in this iinstance,'a' fluid pressure motor is indicated comprising the cylinder D mounted on the frame E suitably secured to the base plate A. cylinder head G is device N may be provided ates throughout in ball 7 bearing Q the reversal of which is controlled bya valve lever 0. .An oiling device P of any suitable type may be applied to the motor. v A center bearing Q, shown in this instance in the form of a shell, havinga tubular body and a flanged portion R, is connected to the motor cylinder D and the cylinder. head G by means of cap bolts H. The opposite end of the center bearing is supported in the gear. boXS, which is secured to the base plate A in any suitable manner. A center bearing retaining screw U suitably secures the center bearing to the inner wall V of the gear box S. An oiling upon the gear box and the gear box cover X is secured to the gear box S by means of bolts Y. The construction of the motor and frame so far described forms a simple and compact frame for the hoist, easily assembled and dis-as sembled and permitting ready accessibility to the operative parts of the hoist. A main driving shaft a passing centrally through the center bearing Q is supported in the ball bearings b and c and provided with a crank .disc 0? having the crank pin 6 connected to the piston f of the motor, by means of ball bearings 9, so that the driving shaft a operbearings.

A driving pinion h is keyed to the driving shaft a and a retaining washer j is held against the driving pinion by means of a pin 70. The driving pinion 72. meshes with an intermediate gear 0 keyed to the counter shaft ;0 operating in the ball bearings and 1" mounted in the gear box S. An intermediate pinion s on the counter shaft p meshes with the internal gear 2, of the main driver a, adapted to rotate on the center from which power is taken for driving either, one of the two drums.

A haulage drum 1) to which one length of the rope w is adapted to be connected, rotates on the center bearing Q and the concentric tail rope drum w to which the tail rope is connected, preferably rotates upon the haulage drum 4).

. driving shaft 61;.

Such construction of concentric drums materially reduces the overall length of thevhoist, and produces amore compact and better balanced hoist than heretofore.

Means are provided for automatically connecting the main driver u to one or the other of the drums o and m in accordance with the direction of rotation of the driving shaft or, and for this purpose, .the haulage drum c is provided'with a driver 2 preferably in the form of a ring, having clutch members in the form of teeth 2 merging into cam surfaces 3. The driver a is suitably secured to the haulage drum 1) by means of the bolts 1 and for convenience of description may be termed the inner driver.

The tail rope drum a" is likewise provided with a driver 5 preferably in the form'of a ring, having clutch members in the form of teeth 6 facing in the opposite direction from the teeth 2 on the driver a and merging into the cam surfaces The driver 5 is secured to the tail rope drum mby means of bolts 8 and for convenience of description may be The spaced teeth 2 :and 6 of each series on the opposed drivers, preferably extend radially .or in the plane of the respective driver on which they are formed.

The terms inner and outer, as applied to the opposed drivers 2 and 5 carried by the drums respectively, are not to be understood as necessarily limiting the ratchet ring concentric with the axis of rotation of the machine, but are intended to be used as suitable designations for two opposed ratchet faces for the drums,

having reference to some fixed point of the machine, which obviously need not be the driving shaft.

The main driver to is provided with a movable clutch member 9, preferably in the form of a pawl slidable between the lugs 10 projectinginwardly from the main driver a to a position between the inner driver a and the outer driver- 5, so that the pawl 9 may engage the inner or outer driver, in accordance with the direction of rotation. of the driving shaft a. I

The pawl 9 as shown, carried wholly bythe main driver a and is mounted upon the body portion of the main driver at a point rearward or at a substantial distance in a radial direction from the The main driver a is rotated in fixed longitudinal relationship to the drums, while the pawl 9 is automatically movable or adjustable relatively to the main driver and to the drums. I V J y In order to insure the movement of the pawl 9, relatively to the drum drivers 2 and 5, guiding means in this instance in the form of an annular plate or ring 11, is located betweenthe maindriver a and thetail rope drum 00. An annular flange 12 is formed preferably formed with termed. the outer driver.

is separate from but in the ring 11 and surrounds the haulage drum 1) asindicated in Figure 1. Thatail rope drum a; preferably surrounds the flange 12 and in'this instance a diagonal slot 13 is formed onthe ring 11.

:a pin 14: which is guided in the slot 18.

' In the operation of the hoist, if it be assumed that the driving'shaft a is rotated in the direction of the arrow 15, in Figure 2, the main driver a will be rotated by the train of gearing described, in the opposite direction, and the pawl 9 will have been moved into engagement with one of the teeth 2 on the inner driver .2 thus driving} the haulage drum '2) in the direction of the arrow 15. The means for moving the pawl 9 into engagement withthe tooth 2 on the driver 2, is the pinl i, which cooperates with the diagonal slot 18 in the guide ring 11. The tail rope dru-m m is disconnected fromthe driving shaft a, but is freely rotatedin the same direction the haulagefdrum a, because the rope y is unwinding from the tail rope drum. 7

Upon reversing the direction of rotation of the driving shaft a, the direction of rotation of themain driver it will be reversed and the pin 14 carried by the pawl 9 will move in the slot 13 in the guide ring 11 so as to engage a tooth 6 on the 'outer'driver 5,

thus driving the tail rope drum m oppositely to the direction of rotation of the driving shaft (1. In such case, the haulage drum '0 will be freely rotated in the same direction as the tail rope drum m, as the rope w is unwound from the haulage drum.

The annular flange 12 on the guidering 11 creates friction between the tail rope drum in and the haulage drum '0, and holds the guide ring 11 stationary momentarily upon'the reversal-of the direction of rota- :tion of the driving shaft w, to cause the pin 1 1 on the pawl 9 to move in one direction or the other in the slot 13 in the ring 11 to engage a tooth .on one or the other of the drum drivers and 5. Upon engagement of the pawl 9 with a tooth on one or the other of the drum drivers 2 and 5, the guide rin ll rotates with the driven drum. 1

In a hoist of the character described, a brake preferably provided for one of the drums, it being unnecessary to provide a brake for both drums in accordance with my construction. In this instance, the tail rope drum may be conveniently provided with a flange 16 to which a brake band 17l1aving a suitable lining 18 is appliedf- A brake lever 19 is fulcrumed at 20 on the lugs 21 and is connected to the ends of the brake band 17. By manipulating the lever 19 the brake will be tightened by the friction between the flange 16 on the tail rope drum :0 and the brakelining 18 and in this manner'the rotation of the both drums 'jmay be controlled The pawl 9 is as long as the drums are connected through the agency of the cable and are doing work. The details of construction of this brake are not shown on the] drawings, because they form no part of the present invention.

I claim 1. In a hoist, the combination of a frame, a driving shaft, two drums concentric with the driving shaft, a motor connected to operate the driving shaft, opposed drivers carried by said drums respectively, a main driver rotated by the driving shaft, a pawl carried by the main driver for automatically connecting said main driver to one or the other of the said oppo-seddrivers in accordance with the direction of rotation of the driving shaft, and a guide member in engagement with said pawl and adapted to insure the movement of said pawl.

2. In a hoist, the combination of a frame, a driving shaft, two drums concentric with the driving shaft, one drum being rotatable upon the other drum, a motor connected to operate the driving shaft, inner and outer concentric drivers carried by said drums respectively, a main driver rotated by the driving shaft, a movablemember carried by the main driver and located between the inner and outer drivers, means for automatically actuating said movable member to connect the main driver to one or the other of the inner and outer drivers in accordance with the direction of rotation of the driving shaft, and means independent of said drivers for moving said movable member.

3. In a hoist, the combination of a frai'ne, a driving shaft, two drums concentric with the driving shaft, one drum being rotatable upon the other drum, a motor connected to operate the driving shaft, inner and outer concentric drivers carried by the said drums respectively, a main driver rotated by the driving shaft, a pawl carried by the main driver and located between the inner and outer drivers, and means independent of said drivers for automatically actuating said pawl to connect the main driver to one or the other of the inner or outer drivers in accordance with the direction of rotation of the driving shaft. v

4;. In a hoist, the combination of a frame, a driving shaft, a motor connected to operate the driving shaft, a haulage drum and a tail rope drum concentric with the driving shaft, an inner driver in the form of a ring on the haulage drum having external teeth, an outer driver on the tail rope drum in the form of a concentric ring having internal teeth, a main driver rotated by the driving shaft, a radially movable pawl carried by said main driver and adapted to engage the teeth of the inner or outer driver in accord ance with the direction of rotation of the driving shaft, and a guide ring cooperating with said pawl for insuring the movement of said pawl in either direction the driving shaft is rotated.

5, In a hoist, the combination of a frame, a driving shaft, two drums rotatable relatively to the driving shaft, a motor connected to operate the driving shaft, opposed drivers carriedby said drums respectively, a main driver connected to be rotated by the driving shaft, a pawl carried wholly by the main driver remote from the driving shaft for automatically connecting said main driver to one or the other of said opposed drivers in accordance with the direction of rotation of the driving shaft, and a guide member associated with said drums and adapted to cooperate with said pawl for insuring the movement of said pawl relative to each of said drivers.

6, In a hoist, the combination of a frame, a driving shaft, two drums adapted to be driven alternately from the driving shaft, a motor connected to operate the driving shaft, opposed drivers carried by said drums respectively, a main driver connected to be rotated by the driving shaft, a pawl carried wholly by the main driver remote from the driving shaft, a guide ringcontacting with said drums, and cooperative guiding means on said pawl and ring respectively for insuring the engagement of said pawl with one or the other of said opposed drivers in accordance with the direction of rotation of the driving shaft.

7. In a hoist, the combination of a frame, a driving shaft, two drums adapted to be driven alternately from the driving shaft, a motor connected to operate the driving shaft, opposed drivers for the drums respectively, a main driver for the drums, a pawl separate from but carried wholly by the main driver remote from the driving shaft, a guide member associated with said drums and adapted to cooperate with said pawl for insuring the engagement of said pawl with one or the other of said opposed drivers in accordance with the direction of rotation of the driving shaft, and means tending to hold said guide member stationary upon the reversal of the direction of rotation of said motor.

8. In a hoist, the combination of a frame, a driving shaft, two drums adapted to be driven alternately from the driving shaft, a motor connected to operate the driving shaft, opposed drivers for the drums respectively, a main driver for the drums, a pawl separate from but carried wholly by the main driver remote from the driving shaft, a guide member movable with said pawl and associated with said drums and adapted to cooperate with said pawl for insuring the engagement of said pawl with one or the other of said opposed drivers in accordance with the direction of rotation of the driving shaft, and means for retarding YlO the n1ove'1n'ent of said guide member when the direction of rotation of the driving shaft is reversed. r r

9. In a hoist, the combination of a frame, a 'drivi'ngshafft, two drums rotatable about said driving shaft, and adapted to be driven alternately therefrom, a motor connected to operate the driving shaft, opposed drivers for the drums respectively, a main driver to'r'the drums, a guide ring having a diago nal slot, an annular flange on said ring located between portions of said 'drums,'and a pawl carried by said main driver and pro vided with a pin extending into the slot in said guide ring, said pin and slot being adapted to cooperate to insure the engagement of said pawl with one or the other of said opposed drivers in accordance with the direction of rotation of the driving shaft 10. In a hoist, the Combination ota frame; a driving "shaft, two drums rotatable about the driving shaft a motor connected to operatethe driving shaft, opposed drivers carried by said drums respectively, a main driver -connected to be rotated by the drivin'g shaft, a movable member carried by the main driver for automatically f connecting said main driver to one or the other of the said opposed driversin accordance with the direction of rotation of the driving shaft, and means independent of the opposed drivers for actuating'said movable member into engagement with one or the other of said opposed drivers. v

11. In a hoist, the combination ofa frame, a driving shaft; 't'wo drums rotatable about ing the driving shaft, a motor connected to opcrate the drivingshaft, opposeddrivers carried by said drums respectively, a main driverconnected'tobe rotated by the driving shaft, a movable member carried by the main driver for automatically connecting said main driver 'to one or the other of the said opposed "drivers in accordance with 'the direction of rotation of the driving shaft, means independent of the opposed drivers for actuating'sai'd movable member intoengagem'ent with one or the other of said opposed drivers, and means tending to hold said actuating means stationary upon the reversal of the direction of rotation of the motor. a

-12. In ahoist,'the combination of a frame, a driving shaft, twodrums'rotatable about the driving shaft, a motor connected to operate the driving shaft, opposed drivers carried by the said drums respectively, a main driver connected to be rotated by the driving'sh'aft, a pawl carried by the main driver for automatically connecting said main ClIlVGl to one or the other of the said opposed drivers in accordance with the direction of rotation ofthe driving shaft, means independent of the opposed drivers for actuatin said pawl into engagement with one or the other of said opposed drivers and frictional means tending to hold said actuatmeans stationary upon the reversal of the direction of rotation of the motor.

In testimony whereof I have signed this specification.

EARL B. LEAR.

Images