US1731691A - Boom-bucket-control mechanism for concrete-distributing apparatus - Google Patents

Description

Oct. 15, 1929. E, WEBE, 1,731,691

BOOM BUCKET CONTROL MECHANISM FOR CONCRETE DISTRIBUTING APPARATUS Filed June 15, 1927 5 Sheets-Sheet l Y Gtbouuqt G. E. WEBB Oct. 15, 1929.

BOOM BUCKET CONTROL MECHANISM FOR CONCRETE DISTRIBUTING APPARATUS Filed June 15, 1927 5 Sheets-Sheet 2 Oct. 15, 1929. G. E. WEBB BOOM BUCKET CONTROL MECHANISM FOR CONCRETE DISTRIBUTING APPARATUS Filed June is, 1927 5 Sheets-Sheet 3 Tic-.1

gwuzntoz flea/gel. Mfebb a i i Oct. 15, .1929. WEBB 1,731,691

BOOM BUCKET CONTROL MECHANISM FOR CONCRETE DISTRIBUTING APPARATUS Filed June 15, 1927 5 Sheets-Sheet 4 E 727 III IIIIPIIIII 6601761? Wbb 0a; 15', 1929. G. E. WEBB 1,731,691

BOOM BUCKET CONTROL MECHANISM'FOR CONCRETE DISTRIBUTING APPARATUS Filed June 15, 1927 5 Sheets-Sheet 5 Patented Oct. 15, 1929 UNITED STATES PATENT OFFICE.

GEORGE E. WEBB, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO. KOEHRING COMPANY, OF -MILWAUKEE, WISCONSIN, A CORPORATION IBOOMFBUCKET-CONIROIJ MECHANISM FOR CONCRETE-DISTRIBUTING APPARATUS Application filed June 15,

The present invention appertains to the art of concrete distributing apparatus or avers of the well known Koehring boom and bucket type, and relates particularly to improvements in bucket control mechanisms therefor.

The mechanisms hereinafter depicted represent radical departures from the customary instrumentalities by which the distributing bucket is moved to and froalong the boom of the paver and the door thereof is actuated in its opening and closing movements. Whereas these mechanisms heretofore have embodied a complication of clutch devices,

cable operating means, knock-out and trip instrumentalities, etc., the present improvements are characterized by a markedly simplified arrangement of devices with accompanying facility of manipulation and control.

In carrying out the invention, instead of the usual intermittently operated or reversing cable control, there is here provided a continuously moving endless cable actuator with which a cable grip mechanism cooperates to eifect traverse of the bucket along the boom in opposite directions.

The mechanism also embodies a novel type of door operating mechanism coacting in a. peculiar manner with theboom to produce the positive opening and closing movements of saiddoor incident to travel of the bucket along the boom.

For a full. understanding of the invention, reference is to be had to the accompanying drawings wherein 1 Figure 1 is aside elevation of the boom and bucket mechanism forming the subject matter of this invention; Figure 2 is an enlarged view of the ,bucket and the door operating mechanisms therefor, the door of the bucket being shown in its open position and as it is about to be tripped for closing, just prior to return to the charg-' ing position at the inner end of the boom; Figure 3 is a transverse sectional vlew through the boom on the line 3-3 of Figure" 1927. Serial No. 199,042.

Figure 4 is a detail view of the trip arm carried by the boom by which the door actuating iustrumentalities are rendered operative\to produce closing movement of the door;

member for yieldingly holding the rotatable friction wheel used in this mechanism in cooperative relation to the boom;

Figure 6 is a longitudinal section of the inner end of the boom, showing more clearly the details of the manipulative control means which causes the operation of the cable grip commencementof the closing movement of the door; I

Figure 10 is a similar view, showing the position taken when the door is fully closed and the bucket returned to its innermost limit of movement on the boom;

Figure 11 is a" detail view of the cable grip cam;

' Figure 12 'is a detail view of one of the cable grip levers;

Figure 5 1s a detail view ofv a supporting Figure 13 is a detail view showing one of the cable clamps; and

' Figure 14 is a detail view of one of the complemental sections of a cable clamp.

Like reference numeralsdesignate corresponding parts throughout the several figures of the drawing.

Referring to'the drawings,A designates the frame of the paver apparatus, B a portion of the mixing drum, and'C the dischar e chute therefor.v The boom D which is of t e conventional form and provided with vertical adjusting means as well as means for hers G-G on the lower flanges of which the trolley wheels H operate. From the trolley I is swung the distributing bucket J, the hollow head casting K of which is mounted upon the longitudinal pivot L.

At this point it is believed desirable to de-= scribe the main feature of these improvements, namely the bucket operating mechanism by means of which the bucket J is caused to traverse the boom. Power for this purpose is taken preferably from the drum ring gear B with which a pinion 1 meshes. Through this pinion, motion is transmitted to the shaft 2 and drive gear 4 mounted on the stub shaft 5; Upon one side of this drive gear is formed a groved pulley 6 about which passes the endless cable 7 which is trained around the spaced guide sheaves 8 carried by the inner end of the boom, the two horizontally disposed reaches of the cable extending along beneath the boom to the point sheave 9. This cable has imparted to it the continuous motion of the drum, though it is to be understood that such correspondingcontinuous motion might readily be taken direct or otherwise indirectly from the prime mover and therefore I do not wish to be limited in this regard.

Motion from this cable is transmitted to the bucket at will through certain cable grip mechanism now to be set forth. Mounted to extend the full operative length of the boom and between its channel members -is'a square 2 shaft 10. Figures 6 and 8.show the. outer end of the shaft to be disposed 'in a rotatable i bushing 11 mounted in the bracket12 which connects the outer ends of the boom channel members together and its inner end is similarly mounted in the bushing 11-"-"c'arried by the inner bracket 12'. At this end the shaft carries a bevel pinion l3-which meshes with vertical shaft 15, which in turn carries an operating member 16, in this form a sprocket wheel which is designed to be operated' by any manipulative means (not shown) to impart a rocking motion to the control shaft 10. It

will be observed that the shaft 15 is disposed in vertical alignment with the boom pivot E so that turning movement of the boom would transmit motion to the sprocket chain which would lead from the sprocket 16 to a corresponding sprocket, for example on theoperators platform; but rocking motion of the shaft would only beobtained. by a relative movement of the shaft 15 underthe control of manipulative means at the command of the operator. a

Rocking of the shaft 10 operates a cam 17, a detail of which is illustrated in Figure 11. -This cam is provided with opposing trunnions 18 and is broached to slidingly receive a corresponding pinion 14 onvthe end of the the shaft 10. It is mounted between the spaced uprights 19. forming part of the connecting web between the two side members 20 of the trolley I, one of the trunnions 18 being grooved at 18'to receive a retaining screw 18". Thus in the movement of the trolley and its bucket, this cam slides along'the shaft and is always in position to cooperate with the adjacent finger levers 21, one at each side of the cam, pivoted a t 22 on the web. Each of these fingers coaets with a grip member or block seated in a recess in the web portion of the trolley and specifically shown in Figures 13 and 14: to comprise complemental interengaging sections 23-23, formed to embrace the cable 7 passing therethrou'gh. Since one of these blocks embraces the outgoing reach of the cable and the other the incoming reach, it is readily understood that by a grip action of one or the other, the cable movement will shift the bucket in one direction or the other along the boom as the cam 17 is turned by the shaft 10 to actuate the respective finger levers 21. The movement of the bucket may be discontinued at any time in its travel by simply restoring the controlling cam to its normal upright positon shown clearly in Figure 3.

Passing now to the bucket door operating mechanism, and referring to Figures 1 and 2, the bucket J is provided with a swing door 24 suspended by the two arms 25-26 and weighted at its upper edge at27 to counterbalance. The rear edge of the bucket opening', as shown in Figure 2, has secured thereto a flexible scraper 28 which removes any material tending to adhere to the surface of the door as it swings into open position and insures tight closure when the door swings back to closed position. To the arm 25 is connected the actuating rod 29 having at its connecting end the cushioning spring 30 within a casing shaft 37 journa'led in the outer end of a supporting lever 38, which inturn is pivoted at 39 in the hollow head casting K of the bucket. With the inner end of the lever 38, a spring 40 coacts and tends to yieldably hold the shaft I 37 at its elevated position, this position being, adjustably determined by an adjustable stop screw 41.

Upon the shaft 37 is fixedly mounted'the friction wheel 42, the peripheral portion of which is formed with interruptions or "opposing flat portions 42 and 42 The periphery of the wheel is provided with suitable friction material. Interlocked with the shaft and the wheel is a trip lever 43 extending in opposed relation to thecrankarm 36. It

is the function of this friction wheel to opcontents of the bucket,;I have provided for a' crate in contact with the under surface of the adjacent boom channel member asthe bucket J travels along the boom and by its rotativc movement to shift the bucket door 24, as will now be more clearly set forth.

of movement a trip arm 44' secured to the boom, depends.- It is to be noted that the flat portion 42 is uppermost and slightly spaced from the boom so that the wheel 42 is out of contact and stationary. Immediately the trip lever 43 impinges the arm 44, the shaft 37 is turned in its bearing, causing the true periphery of the wheel 42 to contact with the superposed boom flange, as shown distinctly in Figure 9, marking the commencement of the closing movement of the bucket door, the

rotary motion of the wheel being transmitted through the parts 36, 35, 34, 32,- 31 and 29 to the door lever 25.

When theflat portion. 42 is reached, as shown in Figure 10, rotation of the wheel is discontinued and the door has reached its closed position, The movement aforesaid brought a oneway acting pawl 45 carried by the wheel 42 into cooperative relation with the boom with which it has biting engagement. The bucket is now charged with another load of material and then by means of the cable grip mechanism hereinbefore described it is moved outwardly along the boom until the desired point is reached, whereupon the operator reverses the cable grip so as to be efi'ective upon the incoming reach of the cable. In the outward movement the pawl 45 simply slides along the surface of the boom Without any operative eiiect, but upon reverse of the travel the biting engagement mentioned shifts the wheel 42 sufii'ciently to bring the true periphery at its opposite side from that referred to above into contact with the boom and the continuation of this inward travel moves the bucket door into open posivents any reverse of such movement which might possibly allow the wheel 42 to accivariable opening of the bucket door. To this end the crank 31 and its connection with the rod 29 are formed with a series of apertures 31. The number provided in the illustrated construction will permit of three difi'erent degrees of opening of the door such as shown in the full and dotted positions of Figure 2 of the drawings.

The door 24 has a movement: in the plane of its body, or that of the opening of the bucket which it closes. Also as it floats, so to speak, to and from closing positions there is caused slight movement lateral to such plane. This ensures tight closing especially and the latter movement is obtained by the linkage mounting of the door and the greater length of the arm or link 26 as compared withthat of the arm or link 25.

Having thus described my invention, what I claim as new and desire to secure by ters Patent is 1. In combination, a boom, a bucket reciprocally traversing said boom, and means to move said bucket relative to the boom comprising a continuously moving actuating member and a power means'for driving the continuously actuated member.

2. In combination, a boom, a distributing element to traverse said boom, an actuator continuously moving along the boom, and control means "for causing the distributing element to at will partake of the movement of the actuator.

3. In combination, a boom, a distributing bucket to traverse said boom, an operating cable, means for actuating said cable, and

,cable grip means for positively engaging the cable and transmitting its motion to the bucket. v v

- 4. in combination, a boom, a distributing bucket to traverse said boom, an operating cable endless in form and having its reaches extending outwardly and inwardly of the boom, means for actuating said cable, and cablev grip means arranged to engage either of the reaches of the cable and to impart either outward or inward movement of the bucket relative to the boom.

5. In concrete distributing apparatus, a

boom, a carriage movable along said boom, a

distributing bucket supported by said carriage, an endless cable having its reaches extending along the boom in spaced relation, a cable grip mechanism carried by said cartriage, and control means for causing engagement of said grip mechanism with one or the other of the cable reaches to thereby control the direction of movement of the bucket.

6. In concrete distributing apparatus, a boom, a carriage movable along said boom, a

distributing bucket supported by said carriage, a cable mounted to have outward and inward movement relative to the boom, cable grip means on said carriage, and control means operable to effect engagement of the grip means with the cable to impart outward or inward movement to the bucket;

7. In concrete distributing apparatus, a

\ mixing drum, a boom, a carriage to traverse said boom, a bucket supported by said car riage, an endless cable driven from said drum and extending along the boom, and cable grip means carried by the carriage and operable to effect reverse movements of the bucket from said cable.

8. In concrete distributing apparatus, a boom, a carriage movable along said boom, a distributing bucket supported by said carriage, a cable mounted to have outward and inward movement relative to the boom, cable grip means 'on said carriage, and control means operable to eflect engagement of the grip means with the cable to impart outward or inward movement to the bucket, including an actuating cam and manual operating means for shifting said cam to render the grip means operable on the cable.

9. In concrete distributing apparatus, a boom, a carriage movable along said boom, a distributing bucket supported by said carriage, an endless cable having its reaches extending along the boom in spaced relation, :1 cable grip mechanism carried by said carriage, including a grip member cooperative with each reach of the cable, and control means disposed between said grip members and operable upon one or the other depending upon whether the bucket is to be moved inwardly or outwardly of the boom.

10. In concrete distributing apparatus, a boom, a carriage movable along said boom, a distributing bucket supported by said carriage, anendless cable having its reaches ex tending along the boom in spaced relation, :1

cable grip mechanism carried by said carriage including a grip member cooperative with each reach of the cable, a rock shaft extending longitudinally of the boom, and a cam member slidingly mounted on said shaft between the gri .members and adapted to engage one or t e other of the same'when the shaft is rocked to thereby render the bucket operable by the cable.

In testimbny whereof I afiix my. signature. GEORGE E. WEBB.

Images