US1483089A - Motion-transmitting mechanism - Google Patents

Description

Feb, 12 i924 1,483Q8g9 E. B. HouGH MOTION TRANSMITTING MEGHANISM Filei Sept. 11 1920 naar B'. HOGH, or CICAGO, rLLinoIs, Assrenon To sur cnrcaeo,

n I j n ivi. Parmis, TRUSTEE, or ILLrNors.

norronmnansnrrms MCHANISM.

Ap'pificaridn inea september 11', ieee. serial No. 409,560. y

Tov all fte/2,0m t may concern:

Be it known that I, EARL B. Hons-H, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois` have invented a certain new and useful Improvement in l\lotionfllransmitting" ll/Iechani's-m, of which the following is full, clear, concise, and eXact description, reference being had to the accompanying drawings, forming a part of this specifica tion.

My invention relates to motion-transmitting mechanism and is more particularly concerned' wvi'tl'r a motion tranemitting` mechanism which I l'iave found so well adapted for usel in the: forni of a lifting or dumping gear for lifting or tiltingv the bodies of dumping vehicles and' the like that I have shown; and described the invention in con'- nectionl with a typical type of such vehicle. It is of coursevr to be understood' however, that I do not intend thereby to limit the invention to such use or purpose only as I am aware and contemplatev various other adaptations of the invention. V

It is 'the object of tl-'ris invention to provide a simple' and 'compact device for dumping truck bodies or the like.

To tilt a dumping body etlicie-ntly and dispose of the load therein, it isv desirable that a" variable lifting effort be provided, the maximum occurring at initial operation and vgradually decreasing as the body raises to upper position.v An inversely variable tilting movement should preferably accom-pany this, so that near the end of the stroke, the increasing lightness of the load may be taken into account to allow the body tio accelerafte inv 'motion until the operation is completed. This, I accomplish by provid'- -i'n'glga pair 'of leverl arms which form an ektcnsible lifting connection betweeen r`the body andr frame and employing a cable to actuate the arms; The cabl'e preferably is moved in a generally horiZoiitalv direction. Tlris hloriz'ontal moveinentis translated into a vertical thrust for lifting the body first by a slreave" for initial' operation and' thereafter 't-flre Sw 1g of vthe` leVerarInSL VThe cable is slecuiedto the' pivoted to the body at a point below 'the general line of` movement of the cable. This has` for its prp'ose the obtaining of a directr initial application .of the" force" VSiubstai'nt-ial-"l'y" vet'ioallyjupoii the load thereby securing a vgreat lifting addrawing vantage. Different e'ective leverages are then' provided throu'gli the' lever arms', giving to the body an accelerated motion until the operation is completed. The' cable moves in a generally horizontal direction which I term the general line' of force. i

A further feature of my invention' is the provision' of a lifting gear of Simple, prac'- ticafl', substantial and inexpensive construction through which a highly effective and efficient application' of the power to the load is had.

Other features and novel provi/sions of the invention will appear from thev follow-v ing detailed description and the claimsftaken with an inspection of rtl'ie accompanying 's in which I shall describe a specific embodiment of the invention in order to fully acquaint those skilled in the' ait with the' nature and scope thereof. In the drawings: Q

Figure l illustrates in' side elevation a dumping truck with my improved lifting` gear applied thereto, the body of the truck being shown in the horizontal position; and Figure 2 is a viewsimilar to Figure l showing the body of thev truc-k tilted, in positio'n for discharging the contents.y

In that this invention is not concerned with the details of construction of the' vehicle in itself, I will give just sufficient description 4of the form Shown in the drawings as will enable those skilled in the art' yto clearlyl un'derstai'id a particular embodiment of my invention in connection tlierewith- Referring to the drawings, the dninping body 5 constituting the` load the' dumping mechanism mustl-if-t and: which may be of any desired construction' in sov far as", the present invention concerned is p tally Vmoinrted at (i upoir the running gear frame 'or bed T of the vehicle. fr seat' S' of. any jsuitable on preferred' type is mounted upon the frame T of the vehicle just forward of the'bod'y' 5', the forward eiid of the body ex? tentling when in the horizontalposition, up inniiediately adjacent therear oflthe seat as there need" be' no provision for the upright lifting structures; found in` the"prior` art,

therebetween Y p of the vehicle' isl tilted about 'rhetody 5 the pivotallmountinfg" 6 to'fcliec'li'argeitscontents'A by p'ver applied through a-motro-n 'traiisrn-ittin niecha-irism9A ory lift'ii mecha .mn-m u. W.. be., mM-. nisn designated generallyby thefreference l.

character 9. This motion transmitting mechanism or lifting mechanism 9 comprises an arm or link 10 pivoted at 11 to a suitable bracket 12, for example, suspended from the frame of the vehicle. The link 10 is pivotally connected at its opposite end with an arm 13, which arm 13 is in turn pivotally connected at its opposite end with the body' as shown at 14. The link 10 performs the function of guiding the lower end of the lifting arm 13 whereby the initial endwise movement 0f the arm 13 is secured without imposing substantially any force thereupon, the cable taking the load directly. rllhereafter, the guiding arm permits the arm 13 to form a strut between the load and Said guide 10 in the nature of a toggle or cam to change vthe generally rhorizontal movement of the cable into a thrust upon the lifting arm. A cable 15 connected at one end with the arm or link 13 at a point 16 within the length of said arm leads up (Figure 1) and is trained over a sheave 17 mounted upon a substantially horizontal axis carried by the frame 7 of the vehicle from where it extends back beneath a sheave 18 likewise mounted upon a, substantially horizontal axis carried b y the frame 7. From beneath the sheave 18 thek cable 15 extends to and is trained about a sheave 19 mounted upon a substantially vertical aXis carried adjacent the rear or after end of the frame 7 and thence forwardly beneath the opposite side of the vehicle. The forward end of the cable 15 is attached to the forward end of a piston 2() rei'iprocable in a suitable cylinder 21 carried by the frame of the vehicle. I preferably employ one of the lifting mechanisms above set out adjacent eac-h side of the vehicle, in which event connection is had between'the forward ends of the two cables and a single piston 20 through an equalizing lever arm 22 as well understood by those skilled in the art.

Assuming that the body 5 is in the position shown in full lines in Figure 1 a dumping operation is had as follows:

The piston 20 is moved forwardly by admitting a suitable motive fluid, either air or liquid, to the cylinder 21 as well understood by those skilled in the art. A substantially direct force or application of power is thereupon applied to the body 5 through the cable 15 and link 13 in the direction indicated by the arrow A (Figure 1) tilting the body about the pivotal mounting 6 into the position shown in dotted lines. This substantially direct initial application of power does not secure great tilting Inovement of the body 5 relative the distance of travel of the piston 20 but applies a relatively great force to the load to obtain a positive initial movement thereof. Upon further forward movement of the piston 20 the power is applied through the levers 10 and 13 arranged to secure great movement of the load relative the distance through which the power is thereafter applied, as evidenced by the relatively great change in inclination of the body 1 and relative slight change in position of the piston 2O in Figure 2 as compared with the dotted line position shown in Figure 1.

It will be apparent that while a substantially direct initial application of the force to the load is had, this initial lifting force is applied through a leverage, that is great lifting edect is had, by reason of the movement of the arm 10 about its pivot 11 and the gradual increase of the angle between the links 10 and 13. '.lhereafter the relatively great increase of the angle between the links 1() and 13 relative to the stroke of the piston provides for relatively great tilting of the body, with only a short application of power.

The rear board of the truck may be hinged and locked by a suitable snap lever to be automatically opened upon lifting the body of the proper angle although of course such provision is immaterial in so far as the present invention is concerned.

While the dumping operation of the body in the particular embodiment herein disclosed is effected by means of a reciprocable piston 20 it is to be understood that the source of power set out simply represents the type which I have fund to be satisfactory, any other source of power may? be employed such as a suitable winch or the like.

The features of providing a direct initial application of the power to obtain a relatively great force and consequently a positive initial movement of the load whereupon the power is applied through a leverage designed to secure great movement of the load relative the distance through which the power is thereafter applied are highly iinportant aspects of my invention.

As hereinbefore set out the invention may appear in other forms and may be used for other purposes.

I claim 1. In combination, a load, a source of power, a pair of lever arms and a flexible element Secured to one of said lever arms for applying power from said source to said load through said arms, first substantially directly tln'ongh one of said arms and. thereafter through a leverage including said arms.

2. In combination, a load, a lifting arm for applying a substantially direct initial force to said load, a swinging arm providing with said first arm a toggle through which. a force is thereafter applied to said load, -a pair of sheaves, a flexible element trained between said sheaves and connected to said lifting `arm below the adjacent sheave when in initial position. and means for pull.- ing on said cable. y 4

3. The combination with lthe running gear of `a vehicle of a dumping body pivotally mounted upon said running gear, a swinging arm carried by said running gear, `a lifting arm between the dumping body and said swinging arm and a cable directly connecting said lifting arm to apply first, la substantially direct initial force to said 'dumping body through said lifting arm, said arms 'thereafter providing a leverage through which the -force is applied to said body to lift said body to the desired inclination.

4. In combination, a frame, a superposed body, a pair of toggle arms linked together, a cable connected tosaid arms, means for pulling the cable in a generally horizontal direction, and means for translating the horizontal pull of the cable in 4a thrust substantially endwise along the line of lthe upper arm for initial movement of the body.

5. In combination, a frame, a superposed load a lifting arm pivo'ted to the load, a guiding member connected to the frame and cooperating with the lower end of the lifting arm,.a sheave secured to the frame and a horizontally movable cable trained over the sheave and secured to the lifting arm below the sheave.

6. In combination, a frame, a load, an unfolding linkage connecting said frame and load, a pulling cable, and guide means on said frame positioned to change the line of force of said cable, during a portion of the movement only.

7 .In combination, a frame, a load, means for moving said load with respect tosaid frame, a pulling cable attached to said moving means to actuate the same, and stationary means for changing the line of action of said pulling cable during ya portion of the movement only.

8. In combination, a frame, a load, means for moving said load with respect to said frame, a pulling cable attached to said movin g means at a point having vertical displacement, and guide means intermediate the extreme positions of the point Of attachmen-t t0 engage the cable and change its line of force.

9. In combination, a frame, a load, means for moving said load with respect to said frame, apnlling cable attached to said moving means at a point having vertical displacement, and guide means positioned to engage the cable and deflect its final reach toward the vertical during the final portion of a downward movement.

10. In combination, a frame, a body pivoted thereto, a two-link linkage connecting a point on said body with the frame, both links being downwardly inclined when in Jn'olded position, a flexible tension member connected to the linkage and running to a relatively remote point in a generally horizontal direction, and guide means positioned intermediate the elevated and lowered positions of the tension connection, to contact the tension member and change its line of' action toward the vertical during the lower Aportion of' the movement.

l1. In combination, a frame, a body pivoted thereto, a two-link linkage connecting a point on said body with the frame, both links being downwardly inclined when in folded position, a flexible tension member connected to the linkage and running to a relatively remote point in a generally horizontal direction, and guide means positioned intermediate the elevated and lowered positions of the ltension connection, to contact the tension member and change its line of action toward the vertical during the lower portion of the movement, the frame link swinging into an upwardly inclined position before the vertical displacement of the tension connection moves the tension member away from said guide means.

In witness whereof I hereunto subscribe my name this 9 day of Sept., 1920.

EARL B. HOUGH.

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