US2195772A - Dump body door actuating mechanism - Google Patents

Description

April 2, 1940- w. E. FARRELL DUMP BODY DOOR ACTUATING MECHANISM Filad Jan. 31, 1959 3 Sheets-Sheet 1 m W m a 3 w E J M i. .W@ l H H I I I IQMI l|.l I W? L MW .1 ,9 -1 IIUI I HHHH U l ln l H i? .n 5 1 46 1 1 5 April 2, 1940. w. E. FARRELL DUMP BODY DOOR ACTUATING MECHANISM Filed Jan. 31, 1939 3 Sheets-Sheet 2 April 1940- w. E. FARRELL 2,195,772

mm BODY noon ACTUATING macxmmsm Filed Jan. 31, 1959 s Shets-Sheet s Z0. Farrefl Patented Apr. 2, 1940 UNITED STATES PATENT OFFICE William E. Farrell, Bethlehem, Pa., assignor to Easton Car & Construction Company, Easton,

Application January 31, 1939, Serial No. 253,868

Claims.

This invention relates to new and useful improvements in vehicle dump bodies generally, although more particularly to side dump bodies.

An object of the invention is to provide a dump '5 body for use on either rail or auto carriages and which includes a novel mechanism effective upon the tilting of the body to open the dump door and maintain the same in a position generally co-planar with the bottom.

1 Another object of the invention is to provide mechanism of the above described character which will positively effect the closing of the door upon the return of the body to normal position,

Another object of the invention is to provide mechanism of the above described character in which door actuating linkage is provided and so constructed and arranged as to occupy a minimum of space between the tops and the bottoms of the sill structures underlying the body.

Another object of the invention is to provide a linkage of the above mentioned character which effects a toggle look when the door is in the closed position.

Another object of the invention is to provide a linkage of the above described character and means rendering it impossible to break the toggle look without actually tilting the body towards the discharge position.

A further object of the invention is to provide mechanism of the aforementioned character. which is simple in design, rugged in construction, and economical to manufacture.

Withthese and other objects in view which will more fully appear, the nature of the invention will be more clearly understood by following the description. the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure l is a perspective view of a side dump mine car embodying the invention.

Figure 2 is a transverse vertical section taken across the right end of the car and illustrating one linkage assembly in detail.

Figure 3 is a horizontal section taken on line 33 of Figure 2.

Figure 4 is a transverse vertical section similar to Figure 2, but showing the body tilted at an angleof 30.

Figure 5 is a view similar to Figure 4 showing the body at a normal full tilt position.

Figure 6 is a detail perspective view showing a portion of one linkage assembly and. the body In in the tilted position.

Figure '7 is a fragmentary front elevation of one linkage assembly.

Referring to the drawings in detail, the invention is shown as embodied in a mine car including a pair of parallel longitudinal or side sills 5, 5 preferably formed from I-beams and rigidly maintained in spaced relation by transverse sills 6 formed from channels and secured across the respective ends thereof, This sill framework is additionally reinforced by a metallic plate 1 secured to the upper faces of the sills 5 in any approved manner, as by welding.

The side sills dependably support the usual axle and flanged wheel assemblies indicated at 8.

A dump body 9 is supported on and laterally overhangs the side sills 5 and. includes a bottom l0, end walls I I ll rigidly secured thereto, a rear side wall I2 rigidly secured thereto and to said end walls, and a front side wall or door l3 pivotally connected to the bottom.

The bottom It is reinforced by a plurality of spaced parallel transverse channel beams M dependably secured thereto and disposed with the webs thereof extending vertically, the lower flanges normally resting on the sill plate 1. Space is thereby provided intermediate the cover plate I and the under side of the bottom to accommodate the door actuating means.

A deflecting shield l5 extends the length of the bottom and is disposed adjacent the door side thereof. This shield is provided with an overhanging lip portion l6 and is secured to the adjacent ends of the reinforcing beams l4 and to the under edge of the bottom.

The body 9 is pivotally connected to one side sill 5 for simultaneous side dumping and door opening operation through the medium of a plurality of hanger assemblies, each of which includes a pair of spaced brackets l1, l1 secured to the web of said one side sill and extending outwardly therefrom and carrying a pivot shaft l8 therebetween. A downwardly extending open framework hanger l9 having spaced web portions 2!], 20 is secured to the outer face of the deflecting shield l5 and is provided at its lower end with a pair of spaced journals 2|, 2| positioned outside the brackets I1 and through which the pivot shaft l8 extends. The upper end of the hanger is provided with a pair of spaced bearings 22, 22 carrying a pivot shaft 23 upon which the door I3 is journaled.

Each hanger I9 is provided with an arcuate deflecting web 24 disposed intermediate the web portions 20 and overlying the pivot shaft I8.

The door l3 tapers in cross section from bottom to top and includes an inner wall section along the bottom of which is secured an outwardly extending L-beam 26. The door is reinforced vertically by a plurality of vertical elements 21 secured to the outer face of the wall section 25 and having their lower ends secured to the L-beam through the medium of angle brackets 28.

Secured to certain of the vertical elements 21 and extending downward through the L-beam in alignment with the respective body hanger brackets I9, is a plurality of depending brackets 29. Each of these brackets 29 includes a web portion 30 extending generally parallel to the adjacent body side and terminating at its end portions in inwardly extending flange portions 3 I, the inner ends of which are provided with doorpivot bearings 32. The flange portions 3| 'extend between the web portions 29 of the associated hanger I9 and are carried by the respective pivot shaft 23 whereby the door may be swung about said shafts.

In order to effect the movement of the door from a closed position to an open position simultaneously with the tilting of the car body, there is provided novel door actuating mechanism which includes a linkage assembly positioned in alignment with each hanger l9.

Each linkage. assembly includes a bracket 33 extending through an aperture 34 in the sill plate 1 and secured in an adjustable manner by means of shims to the side sill not carrying the body pivots. A link 39 including a web portion 36 and parallel flanges 31, 31 has one end pivotally secured to the bracket 33 by a pivot pin 38 extending therethrough. The other end of the link is adapted to receive and pivotally connect with one end of a similar but longer link 39 through the medium of a pivot pin 49 extendnig therethrough and having its ends projecting therebeyond. Rollers 4| are journaled upon the respective projecting ends of the pivot pin for a purpose soon to be explained. The other end of the link 39 is pivotally connected between the lower web portions of the associated door bracket 29 as at 42. It is to be noted that the link 39 extends through the space intervennig the web portions of the hanger l9 and that the entire assembly is located in the space defined by the sill plate I, the body bottom, and the opposing webs of two adjacent transverse reinforcing beams l4.

By referring to Figure 2 of the drawings it will be observed that when the body is in normal or load-receiving position -the door I3 is in the closed position and is securely maintained in such position by the above-described linkage assembly which is disposed in straight line position, the links 35 and 39 forming a locked toggle joint at their common pivot.

In order that the body may be tilted and the door simultaneously opened for dumping, means are provided for first raising the toggle pivot 40 to break the locked toggle joint, and then to guide and restrain the pivot from free movement, or in other words to control movement of the door, as the body is tilted. This is accomplished through the medium of symmetrically opposed guide castings 43, a pair of which are secured to the opposed webs of the two transverse beams |4 embracing each linkage assembly. Each casting 43 comprises a web-contacting plate 44 and an outwardly projecting flange 45 which is shaped to provide an open recess 46 forming on its upper internal surface a guide cam 41 and terminating at one end in a relatively short laterally extending hook or lifting portion 43.

The rollers 4| on the pivot shaft 49 are disposed within the recess 46 and engage the opposing surfaces of the hook or lifting portion 43 when the body 9 is in normal or load-receiving position.

It will be noted that the guide castings 43 securely lock the toggle joint when the body 9 is in the lading receiving position shown in Figures 1 and 2, and that, due to the positioning of the linkage assembly under the body and over the sill plate 1, it is impossible to break the toggle joint by prying or otherwise, except by actually tilting the body.

As the body is tilted about the pivot l3 the guide castings 43 are raised, thereby raising the link connection 40 througnthe medium of the rollers 4| to break the locked toggle. Continued movement of the body causes a simultaneous opening of the car door by the relative shortening of the linkage as the links 39 and 39 tend to pivot and swing together about the upwardly moving pivot 40. As the center of gravity of the door I 3 is outboard of the door pivot 23, the weight of the door will be transmitted back through the connected linkage. This causes the rollers 4| to maintain contact with the cam portions 41 of the guide castings. When the body has been tilted approximately 30 from the horizontal, as shown in Figure 4, the door l3 has opened to a position in which the inner wall 23 is substantially co-planar with the bottom II and is prevented from opening farther by stops 49 on the door brackets 29 coming into contact with stop bars 50 secured to the under side of the bottom for that purpose. At this angle of tilt the rollers 4| are just about to break contact with the cam guides 41, and continued tilting, as to a position shown in Figure 5, allows the guides to move free of the rollers.

As the body is returned to normal position, from that of full tilt, the body floor Ill and the door wall 25 remain in co-planar relation until the rollers 4| engage the cam portions 41. Then, as the return movement is continued, downward pressure of the cam portions 41 on the rollers 4| is transmitted through the linkage to effect the closing of the door. Locking of the door in the closed position is effective by the formation of the linkage toggle lock which is maintained by engagement of the rollers with the castings 43 as shown in Figure 2.

Thus it will be seen that herein is described a side dump body for vehicles which includes a linkage mechanism effective upon the tilting of the body to open the dump door, then close the door upon return to the normal position, and in which is embodied a toggle lock to maintain the door in the closed position when the body is in normal load-receiving position. It is to be understood, of course, that the novel linkage herein disclosed can be applied to rear end or other side dump bodies without departing from the spirit of the invention as defined in the appended claims.

I claim:

1. In a device of the character described, an undercarriageincluding a supporting framework, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being upon tilting of the body to open or close said door,

and means movable with said body and engageablewith and disengageable from said link sets for moving the links to effect and control opening and closing of said door.

2. In a device of the character described, an under carriage including a supporting framework, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being pivotally connected together with said door and said under carriage and automatically effective upon tilting of the body to open or close said door, and means movable with said body and engageable with and disengageable from said link sets for moving the links to effect and control opening and closing of said door, said last named means being effective in the lowered position of the body to secure said links against movement.

3. In a device of the character described, an under carriage including a supporting frame, a

lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being automatically effective upon tilting of the body to open or close said door, said link sets including two links one having one end pivotally secured to said supporting frame and its other end pivotally connected to the other link, said other link having its other end pivotally secured to the door, and means carried by said body and movable upwardly therewith as the body is tilted to a dumping position and downwardly therewith as the body is returned to a non-tilting position and slidably engageable with the common link pivot of said link sets for moving the links and controlling movement of said links to effect and control the door opening and closing.

4. In a device of the character descrihed, an under carriage including a supporting framework, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being pivotally connected together with said door and said under carriage and automatically effective upon tilting of the body to open or close said door, said toggle link sets forming a generally horizontal straight line toggle look when said body is disposed in normalnon-tilted position, and means movable with said body and engageable with the links for securing the links in the toggle lock position when the body is in the normal non-dumping position and effective upon movement of the body toward a dumping position for disrupting said toggle lock condition of the links.

5. In a side dump car, a bottom, end and side walls defining a lading space open at one side, frame means depending from the body and forming a space therebeneath, under frame means for supporting the body, means pivotally supporting the body on the under frame means, a door pivotally supported on the body and movbeneath the body for locking the door in the closed position, and means movable with the body and effective upon tilting thereof in the upward direction for first positively breaking the toggle and initiating'opening movement of the door and thereafter controlling said opening movement and efiective upon downward tilting movement of the body for positively returning the door to the closed position and the toggle links to their normal toggle lock position.

6. In a device of the character described, an under carriage including a supporting frame, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being automatically effective upon tilting of the body to open or close said door, said link sets including two links one having one end pivotally secured to said supporting frame and its other end pivotally connected to the other link, said other link having its other end pivotally secured to the door, actuating means supported at the point of mutual connection of said links, and a slide bracket secured to the body and engaged with the actuating means for moving the links as the body is tilted to control opening and closing of said door.

7. In a device of the character described, an under carriage including a supporting frame, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being automatically efiective upon tilting of the body to open or close said door, said link sets including two links one having one end pivotally secured to said supporting frame, and its other end pivotally connected to the other link, said other link having its other end pivotally secured to the door, actuating means supported at the point of mutual connection of said links, and a slide bracket secured to the body and engaged with the actuating means for moving the links as the body is tilted to control opening and closing of said door, said bracket having an end recess portion for receiving said actuating means and positively holding the links in the door securing toggle lock position when the body is in its nontilted position.

8. In a device of the character described, an under carriage including a supporting frame, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, toggle link sets beneath said bottom, the links of each set being automatically effective upon tilting of the body to open or close said door, said link sets including two links one having one end pivotally secured to said supporting frame and its other end pivotally connected to the other link, said other link having its other end pivotally secured to the door, actuating means supported at the point of mutual connection 01' said links, a slide bracket secured to the body and engaged with the actuating means for moving the links as the body is tilted to control opening and closing of said door, said bracket having an end recess portion for receiving said actuating means and positively holding the links in the door securing toggle lock position when the body is in its non-tilted position, andjnterengaging stop means for holding the door substantially co-planar with the body bottom at a definite tilt oi the body, said bracket and actuator means being separable after the stop means become effectively engaged to permit additional tilting of said body.

9. In a device of the character described, an under carriage including a supporting framework, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, and means including toggle link sets beneath said bottom, the links of each set being movable upon tilting of the body and being pivotally connected together and with said door and said under carriage and automatically eflective upon tilting of the body to positively open or close saiddoor, each link set being normally disposed with the pivots thereoi in alignment to thereby positively secure the door in the closed position.

10. In a device of the character described, an under carriage including a supporting framework, a lading body pivotally connected to said supporting framework and having a lading supporting bottom, lading space defining walls and a dump opening, a door swingably mounted on said body and closing said opening, and means including toggle link sets beneath said bottom, the links of each set being movable upon tilting of the body and being pivotally connected together and with said door and said under carriage and automatically effective upon tilting of the body to positively open or close said door, each link set being normally disposed with the pivots thereof in alignment to thereby positively secure the door in the closed position, and means for engaging said links and securing them against movement when the body is in the normalor non-tilted position.

WILLIAM E. FARRELL.

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