US1431090A - Hoisting mechanism - Google Patents

Description

H. C. BECKWITH.

HOISTING MECHANISM.

APPLICATION FILED Aue.22. 1919.

1,481,090 Pat ented Oct. 3, 1922.

3 SHEETSSHEET I.

I l I I l l 1 H. C. BECKWITH.

HOISTING MECHANISM.

APPLICATION FILED AUG,22, 1919. 1,4L3LQ90, Patented 0011.3,1922.

3 SHEETS-SHEET 2- H. C. BECKWITH.

HOISTING MECHANISM.

v APPLICATION FILED AUG.22, 1919. 1 43 1 99 Patented Oct. 3, 1922.

3 SHEETS-SHEET 3.

Patented et. 3, 1922.

STATES PATENT-OFFICE.

HENRY C. BIICKWITH, OF RAVENNA. @HIO, ASSIGNOR TO THE JOHN 1E. BYERS MACHINE COMPANY, 015 RAVEN'N'A, OHIO, A CORPORATION OF OHIO.

HOISTING MECHANISM.

Application filed August 22, 1919. Serial No. 319,131.

To all whom it may concern: I

Be it known that I, HENRY C. BECKWITH, a citizen of the United States, and a resident of Ravenna, county of Portage, and State of Ohio, haveinvented a new and useful Improvement in Hoisting Mechanism, of which the following is a specification, the principle of the invention being hereinexplained and thebest mode in which I have contemplated applying thatprinciple, so as In said annexed drawings 2-"- V Fig. 1 is a plan view of mymacliine; Fig. 2 is a side elevation of the same; Fig. 3 is a side elevation showing the boom. bucket, and controlling means therefor; Fig. I is a section on the line 4-4, Fig. 1; and Fig. 5 is a section on the line 5-5,

In Figs. 1 and 2 the generalconstruction of the machine may be seen, consisting of a rectangular framework 1 supported upon wheels 2 and 3, of which the wheels 2 are-gpropelling wheels and the wheels 3 the steering wheels. The steering wheels"3.".

which are at the rear, may be controlled by means of a steering column 4, worm 5 and gear 6, and a transversely extending'shaft 7, over which is wound a chain 8 attached to either end of an axle 9 mounted in the two opposite wheels 3.

On the floor or horizontal framework '1 of the machine is mounted an A frame, consisting of members 10, braced by means of a diagonal support 11 andforming an upper support for a vertical rotatable mast 12,

which is suitably mounted at its lower end in the floor of the frame. Supported upon suitable uprights, 13 and 14, attached to the frame and to' the diagonal brace 11 is a canopy 15. The machine as so far described is not essentially difierent from previous machines of this same general type.

Mounted on the fioorof the machine at the rear is a suitable power means, such as a gas engine 16, with a cooling"system 17 therefor, drivin two power shafts '18 and 19, which are disposed in parallelism and transversely of the machine frame. The

drive to' these power shafts is through gears 20 and 21, and 24, 25 and 26, and the engine16, with the power shafts l8 and 19 and winding drums 22 and 23 thereon, constitutes a two-drum hoisting engine which i is in common use on amachine of this character. The drums 22 and 23 are loose on the shafts 18 and 19 and may be thrown 'into engagement therewith by means of clutches 27 and 28, respectively, and the operating levers 29 and 30. The shafts 18 and 19 differ from the shafts of the ordinary two-drum hoists only in being extended transversely across the frame, and .there carrying friction heads 31 and 32, which are respectively keyed to the two shafts. C0- operating with-these friction heads or clutch members are loose members 33 and 34, which are adapted to be moved outward and away from the members 31 and 32. and into and out of engagement therewith. The memhere 33 and 34 carry sprockets 35 and 36 integral therewith.

a In Fig. 4 the construction of the means for engaging and disengaging the sprockets 35 and 36 is shown. Similar 'means are used 'oneach sprocket. The member 33, which is rotatably and-slidably mounted on the shaft 1 18 and carries the sprocket 35 is adapted to be moved into operative engagement with the friction head 31 by means of a collar 3?- and slidable key 38. The'key 38 is slidable lengthwise on the shaft 18 in a slot which is aga-iI-istthe collar 37 by means of, a pin 39 rotatably mounted in a longitudinal opening in the end-of the shaft and operated by means of a screw 40 formed on its outer end and formed therein. and may be moved inward working in a threaded collar 41 attached to the frame. Attached to the outer end of the threaded member-40 is a lever 42, adapted,

upon being swung in one direction, to work the'pin 39 inward to press the friction head 33 against the head 31, thus engaging-the sprocket 35 on thelshaft 18. Areversemo'vement oftli lever42wil l permit the disengagement of the two frictional members which,.constitute the clutch, and a similar construction is provided for engaging the clutch members 34 and 32 to fasten the sprocket 36 to the shaft 19. This similar means also employs a lever 43 connected'by means of a rod 44- to the lever 42, while a similar pin 45 is provided, but having an oppositely threadedportion for engaging the clutch 34 upon the disengagement of the clutch 33..

The connection between the two levers 41 and 43 cause simultaneous operation of the two clutches, but in reverse directions so that one is disengaged when the other is engaged. The rod 44, for operating the levers, is extended and connected to the shaft 46, oper- 'ated by means of a hand lever 47, and movementof this hand lever in its two directions causes the above described operation of the sprocket-engaging clutches.

Mounted beneath the frameof the machine is a propulsion shaft 60, (see Fig. 5), which is, in reality, two shafts driven by differential mechanism contained in a differential case 61 and operated by a single differential gear or. sprocket 62 in the usual manner. On this shaft 60 are carried two sprockets 63, over which are mounted chains 64 for driving sprockets 65 carried on the driving wheels 2, both driving wheels being driven through the differential means and chains in the usual manner.

sion 73 of this shaft 66, and may be thrown into engagementby means of a clutch 74.

There is a chain 80 passing over the sprockets 35 and 36 on the shafts 18 and l9,

--then down and around the lower side of the sprocket 62 driving the difierential mechanism, and then up and around the sprocket 67 driving the thirdfshaft 66. This chain then passes over two idle sprockets 81 and 82, of which .thesprocket81 is adjustably carried on ashort link 83, the adjustment being secured by means of a turnbuckle 84, which may be tightened to draw this sprocket away from the others and tighten the tensionon the chain. In this way a drive is secured for all of the shafts and drums of the machine from a single chain and from a single driving shaft, which is the shaft of the engine, without the use of any reverse gearing or of any transmission mechanism, such asyis commonly used in these machines, and is to be avoided if possiblebecause of its extreme weight andcomplication. By

the operation of the lever either the sprocket 35 or 36 may be engaged for driving by the shafts 18 and 19, respectively, in this way securing either a forward or reverse drive of the chain 80. Thus, the machine may be propelled in either direction by the operation of this chain, or the shaft 66 may be turned in either direction, thus operating the drums 68, 71 and 7 2 when properly engaged by their respective clutches. \Vhen the machine is to be spotted and the boom is to be operated a clutch 85, which enages one of the driving sprockets 63 which drives one of the chains 64 extending to the driving wheels of the machine, is thrown out of engagement by means of a lever 86, and in this way one of the wheels of the machine is disconnected.

.When so disconnected the differential mechanism is free to turn one portion of the shaft 60 as the other or connected sprocket 63 is held against movement by the welght of the machine resting upon the wheel connected thereto.

The operation of the various drums ano hauling lines in connection with the manipulation of the boom and hoisting mechanism is substantially the same as on other machines of this general type, and need not be described in detail. The present invention relates to the means for operating the drums and propelling mechanism from a single engine and through" the combined mechanism already described.

v Other modes of applying the principle of my invention may be employed instead of the one explained,change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed. 7 Y

I therefore particularly point out and distinctly claim as my invention 1. In a machine of the character described, the combination of a frame, traction Wheels therefor, an engine, two driving elements operable thereby in opposite directions, a hoisting drum shaft, a differential shaft operative y connected to said traction wheels,

and means operable in either direction, by

said engine through said two driving elements, said means being connected to operate said hoisting drum shaft and said differential shaft.

2. In a machine of the character described, the combination of a frame, traction wheels therefor, an engine, two driving elements operable thereby in opposite directions, a hoisting drum shaft, a differential shaft operatively connected to said traction wheels, and means operable in either direction by said engine through said two driving elements, said means being connected to operate said hoisting drum shaft and said differential shaft, and means adapted to operatively disconnect said differential shaft from one of said Wheels while permitting continuous operation of said shaft.

3. In a machine of the character described, the combination of a frame, traction wheels therefor, an engine, two driving elements operable thereby in opposite directions, a

hoisting drum shaft, a differential shaft operatively connected to said traction wheels, and means operable in either direction by said engine through said two driving elements, said means being connected to operate said hoisting drum shaft and said differential shaft, and means adapted to simultaneously connect one of said two driving elements from said engine and to disconnect the other thereof.

4. In a machine of the character described, the combination of a frame, traction wheels therefor, an engine, two power shafts operable by said engine in opposite directions, drivin elements loose on said shafts but movab e into engagement therewith, a hoisting drum shaft, a differential shaft operatively connected to said traction wheels, :1 continuous driving belt operatively connect- ,ing said driving elements on said power shafts with said hoisting drum shaft and said differential shaft, and a single means adapted to move either of said driving elements on said power shafts into engagement with its respective shafts.

5. In a machine of the character described, the combination of a frame. traction wheels therefor, an engine, two power shafts operable by said engine in opposite direction, driving elements loose on said shafts but movable into engagement therewith, a hoisting drum shaft, a differential shaft operatively connected to said traction wheels, a contlnuous driving belt operatively connecting said driving elements on said power shafts with said hoisting drum shaft and said differential shaft. a single operating lever having connection with said two driving elements, said lever being adapted to move either of said driving elements into engagement with its respective shaft, and means adapted to disconnect one of said traction wheels from said differential shaft.

6. 111a machine of the character described, the combination of a frame, traction wheels therefor, an engine, a propelling shaft operatively connected with said wheels, a hoisting shaft, and two oppositely rotating power shafts. driving and driven elements on said shafts, a belt operatively connecting all of said elements, and means adapted to operativelv connect either one of the driving elements on said power shafts with its respective shaft.

Signed by me, this 9 day of Aug, 1919.

HENRY C. BECIUYITH.

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