US2026347A - Fluid operated motor - Google Patents

Description

1935- o. w. JOHNSON FLUID OPERATED MOTOR Filed Dec, 1, 1952 2 $heets-Sheet 1 INVENTOR. OSCAR W. TOHNSON BY M de 9 /5 1 V EYE Dec. 31, 1935. o. w. JOHNSON FLUID OPERATED MOTOR Filed Dec. 1, 1932 2 Sheets-Sheet 2 uvmyrozz.

OSCAR W. JOHNSON Patented Dec. 31, 1935 2,026,347

UNITED STATES PATENT OFFIQE FLUID OPERATED MOTOR Oscar W. Johnson, Rochester, N. Y., assignor to The American Laundry Machinery Company, Cincinnati, Ohio, a corporation of Ohio Application December 1, 1932, Serial No. 645,243

1 Claim. .(Cl. 121-38) My invention relates to a motor means of a pressing engagement with a pressing bed carpiston and cylinder type, and will be hereinafter ried by the frame I by means of straightening of described as the motor means for a scissors type a toggle mechanism made up of links 6 and I pressing machine including head and bed mempivotally connected together as at 8, the link 6 bers movable into pressing engagement by such having one of its ends pivotally connected to the 6 motor means. arm 3 as at 9 and the link I having one end piv- It is one object of my invention to provide a otally connected to the frame I as at [0, the togpiston and cylinder type motor means wherein gle mechanism being actuated by a motor means the relative movement of the pressing members hereinafter described. Reversely, the head 4 is in closing and in exerting pressing pressure on moved out of engagement with the bed 5 and work therebetween will be greatly multiplied the toggle broken by means of a. spring H havrelative to the movement of the piston of the ingoneof its ends connected to the frame I and motor means, to thereby permit of a piston and its other end connected to the arm 3 on the opcylinder type motor means wherein the piston has posite side of the pivot thereof from the head 4.

a short throw and requires but a small volume A motor means for straightening the toggle 1 of fluid pressure, in contradistinction to the made up of the links 6 and 1 consists of a piston hereinbefore prevalent type of piston and cyll2 in a cylinder l3, the piston l2 having its rod inder motor means wherein the piston had a long l4 connected to the toggle link 1 as at l5. Such throw for causing initial engagement of the pressconnection between the piston rod l4 and the link ing members and thus necessitated a relatively 1 is well below the pivotal connection 8 between large volume of fluid pressure. the links 6 and I to thereby reduce the distance Another object of my invention is to pronecessary for the piston l2 to travel in straightvide a motor means of the piston and cylinder ening the toggle to move the pressing head 4 into type wherein quick closing of the pressing memengagement with the pressing bed 5 and cause hers is accomplished with a short throw of the pressing engagement therebetween. Fluid prespiston; wherein the motor means includes a sure is supplied to the cylinder [3 to move the minimum number of parts; and wherein the piston l2 in one direction through a fluid line l6, motor means is a self-contained unit of a nathe piston l2 being moved in the opposite directure to be applicable to substitution for the pistion by action of the spring II in breaking the 3 ton and cylinder type motor means now in use toggle made up of the links 6 and l. 0 without necessitating changes'in the pressing Flow of fluid through this line is controlled by machine construction. a valve ll operable by ahandle l8. Preferably,

Various other objects and advantageous feathere are two of these valves connected either in tures of my invention will be seen in the followseries or in sequence in the fluid line, whereby to ing description and one embodiment thereof may provide the well known two hand control. be seen in the accompanying drawings wherein In accordance with my invention, the piston similar characters of reference designate correrod I4 is not-rigidly connected to the piston l2 sponding parts, and wherein: but is connected thereto by an articulated con- Fig. 1 is a side elevation of a pressing machine nection. As shown in Figs. 2 and 3, the face of having a motor means constructed in accordthe piston I2 toward the piston rod I4 is proance with my invention forming a part there-- vided with three outwardly extending bifurcated of; F g- 2 is a View longitudinally of the motor lugs or ears I9 and the connection between the means, partly in section, showing the piston and piston l2 and the piston rod I4 is made by a cylinder type motor means constructed in acp ura ity o toggles made p of links 20 and cordance with my invention; Fig. 3 is a view taken The links 20 are pivotally connected intermediate on the line 3-3 of Fig. 2; and Fig. 4 is a view their ends, and preferably at a point closer one similar to Fig. 2 but showing a modified form of end than the other of the links as at 22, to the motor means. ears l9, the lower ends of these links being con- In Fig. l of the drawings, I have shown a nected to the links 2| as at 23. At their opposite pressing machine of the scissors type which inends the links 2| are pivotally connected as at 24 cludes a base frame I provided with an upwardly to a spider 25 which is integral with or rigidly extending arm 2 on the rearward side thereof, connected to the innermost end of the piston rod on which is pivotally mounted an arm 3 carrying l4. It will be noted in Fig. 3 that the ears or outa. pressing head 4 on one end thereof. The wardly extending lugs 19 are circumferentially pressing head 4 is arranged to be moved into spaced on the surface of the piston l2. The free mounted on the inner surface of the closure 29 for one end of the cylinder, the segments of the spider 25 having bearing surfaces on the inner surfaces of these extensions as shown at 30 in Fig. 3 which serves to hold the piston rod in aligned position. The circumferentially spaced toggles serve to maintain the alignment of the piston l2.

In the operation of this motor means, when fluid pressure is allowed to flow through the line l6 and into the cylinder l l by reason of operation of the valve or valves [1, the piston I2 is moved forwardly. The free ends of the links 20 which carry the rollers 26 are held against movement by reason of the rollers 26 contacting with the inner ends of the inwardly extending members 28. Thus, forward movement of the piston 12 will result in movement of the link 20 about its pivot with the lower end of the link moving outwardly to the right as viewed in Fig. 2 which will serve to project the piston rod l 4 outwardly through the link connections 2|. With this arrangement, it will be apparent that the piston rod i l will move outwardly of the cylinder .at a much faster rate than the rate at which the piston 12 is moving since the pivots 22 of the links 20 are closer the top than the bottom of the links. 7 Continued outward movement of the piston l2 will continue to swing the links 20 about their pivots 22 and move the piston rod l4 outwardly through the "toggle straightening effect until the toggle is substantially straightened and the rollers 26 pass beneath or inside of the inward extending members '28, the parts and connections being preferably so arranged that the pressing'members reach initial engagement simultaneously with straightening which occurs before the piston l2 reaches the innermost ends of the inwardly extending members 28. Likewise, the pivotal connections '22 between the links 29 and the ears or outwardly extending lugs i9 is such that the rollers 26 will engage depressions 3! in the surfaceof the piston 12, which depressions are made on true circular arcs struck from the centersyof the pivots 22. Thus, when the toggles made up of thelinks 2E] "and 2| are straightened, the moving effect of the piston I2 will be transmitted directly to the piston "rodl'fi through the links -20 and 2! and the movement of the piston rod M will be at the same rate as that of the piston l2. Thus, movement of the piston l2 under the effect of fluid pressure admitted to the cylinder will be first effective to move the piston rod l4 outwardly with considerable speed to cause a quick closing of the pressing members and then a final slower movement which produces the pressing pressure between the members.

Referring to Fig. 4 of the drawings, I have 5 shown a modified form of motor unit wherein only a single inwardly extending lug or ear 32 is provided on the piston l2, this inwardly extending lug or ear being connected by a toggle mechanism identical with those hereinbefore described with 10 the piston rod I4.

In this construction, only a single inwardly extending member is provided on the closure 29 of the cylinder and the piston l2 differs from that hereinbefore described in that it includes an annular extension 33 which serves to 15 maintain the piston l2 in an aligned position in the cylinder. Otherwise, the two constructions are identical.

Referring to the drawings and the preceding description, I have provided a motor means of a 20 addition to this, I have provided a motor means 25 wherein both the closing movement and the pressing pressure movement of the pressing members are accomplished by a relatively short travel of the piston. The accomplishment of these movements by such short piston movement gives the 30 advantage of permittingoperation of the pressing machine with but a small volume of pressing pressure fluid.

What I claim is:

A motor means comprising a cylinder, a piston -adapted to reciprocate therein, a piston rod guided for reciprocating movement axially of said cylinder, a plurality of cam members spaced circumferentially about said piston rod, said cam members having portions'exten-ding longitudinally 4 of said cylinder toward said piston and other portions extending outwardly therefrom transversely of said cylinder at the ends of said cam members nearer the piston, said piston rod having at its inner end a portion rigid therewith and extending between the longitudinal portions of said cam members, and a plurality of pairs of toggle links, one for each cam member, each pair having the free end of one link pivotally supported on said inner end portion of the piston rod and having the central portion of the other link of the pair pivotally supported on the piston, the free end of each o-f'the last-named links being adapted to contact the transverse portion of its associated cammember, whereby said toggles are straight- 55

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