US3456821A - Refuse loader with toggle action - Google Patents

Description

July 22, 1969 G. D. `PAFFAS ET Al- REFUSE LOADER WITH TOGGLE ACTION 2 Sheets-Sheet 1 Filed Aug. 14, 1967 @f7/m mm my@ 0mm MH MY Em G R VFAh 0 5 6 EN. w .w 6/ G H r Nw, 2 u 4 2 m. F u a 5m 4 u i: Q f F July 22, 1969 G, |3` PAPPAS ET Al- 3,456,821

REFUSE LOADER WITH TOGGLE ACTION 2SheetsfSheet 2 Filed Aug. 14, 1967 N VENTOR.

A T TORNE Y GE ORGE DE M0 PAPPAS ALEX KAY HOOVER 3,456,821 REFUSE LOADER WITH TOGGLE ACTION George Demo Pappas and Alex Kay Hoover, Fort Worth, Tex., assignors to Fruehauf Corporation, Detroit, Mich., a corporation of Michigan Filed Aug. 14, 1967, Ser. No. 660,341 int. Cl. 365g 65/60 U.S. Cl. 214-833 2 Claims ABSTRACT F THE DISCLOSURE This invention relates to refuse collecting vehicles and has reference to a rear loading mechanism therefor.

Generally, hydraulically operated rear loading vehicles, including tiltable buckets and packer blades operable therein, are old in the art. The blades were operated by large diameter hydraulic cylinders which were slow in their operation. Most trash and garbage collections are made on a task set-up basis, that is, an average time for collecting on any one route is established and if the workmen nish before that time they have the remaining time off, but at a full days pay. Such arrangement is not objectionable to management and as a result the vehicle driver and collectors work as fast as practical. Even a fraction of a minute saved during each packing operation amounts to considerable time saved over an entire collecting route.

An object of the invention is to provide a rear loading trash collecting vehicle having a pivoted packer blade, a toggle action for moving the blade, which action is such that the blade moves fast at the beginning of its stroke and slower but with more force near the end of its stroke.

Another object is to provide, in a rear loading trash collecting vehicle having a tiltable collecting bucket, hydraulic bucket tilting means on the sides of the vehicle, thereby eliminating the usual telescoping hydraulic cylinder heretofore used. Such cylinders were not only expensive but were located beneath the buckets where they collected debris of various kinds.

Another object is to provide blade operating means which do not apply torque loads on the shaft supporting the blade, thus making possible the use of smaller diameter shafts without breakage.

A further object is to provide a hydraulically operated rear loading trash collecting vehicle having smaller diameter cylinders requiring low pressures whereby such vehicles may be manufactured at a lower cost.

Generally, the invention contemplates a rear loading trash collecting vehicle which may be manufactured at relatively low cost, yet one which is efficient in its operation.

These and other objects of the invention will become apparent from the following description and the accompanying drawings, in which:

FIGURE l is a fragmentary vertical section, as viewed from the side, of the rear end of a trash collecting vehicle body showing a preferred form of loader assembly according to the invention.

FIGURE 2 is a rear end elevational view, partly shown in broken section, of the loader assembly.

FIGURE 3 is a transverse vertical sectional view showing the installation of one of the two bucket operating cylinders.

FIGURE 4 is an enlarged broken perspective view showing the packer blade and one of the toggle mechanisms, and

FIGURE 5 is a broken side elevational View of the rear of a trash collecting vehicle body and loader assembly and showing the bucket in its retracted or tilted position. Additionally, FIGURE 5 shows the down position of the bucket by means of dotted lines and the relative position of the loader assembly as occurs when the body is tilted to empty its contents.

In the drawings the numeral 10 designates a trash collecting vehicle body having side walls 11, a bottom or oor 12 and a top wall 13. Girdles 14 of channel material are provided around the side and top walls 12 and 13 and the body is mounted on spaced parallel longitudinals 15 which are pivotally mounted on a vehicle chassis, not shown. The rear end of the body 1t), which is open, is downwardly and rearwardly inclined and has body frame members 16 on the sides of the opening. As shown only in FIGURE l, there is a cross member 17 between the ends of the longitudinals 15 and which member is inclined to conform with angle of the opening of the body 10.

Normally covering the opening of the body 10, there is a rear loader assembly 18 which includes side walls 19 and a cover 20. The rear portions of the walls 19 extend downwardly below the vehicle body 10 where they are provided with a step 21. The loader assembly 18 is open, both front and back, and the front opening has frame members 22 which rest against the body frame members 16. The loader assembly 18 is attached to the top of the rear end of the vehicle body 10 by forwardly extending plates 23 on the upper outer areas of the loader walls 19 and pins 24 therethrough and through the upper ends of the body frame members 16.

Intermediate the upper and lower ends of the walls 19 of the loader 18 and spaced from the forward and rear edges thereof, there is a transverse shaft 25, the ends of which are received in blocks 26 on the inner surfaces of the loader walls. A packer blade 27 is pivotally mounted on the shaft by means of a bearing sleeve 28 which extends along the top of the blade. The blade 27, as illustrated in FIGURE 4, includes spaced vertical reinforcing iibs 29 which are beveled on corresponding edges at the ends thereof opposite the sleeve bearing 28, and there is a horizontal rib 30 between the first mentioned ribs at the top of the referred to bevels. Similarly, there is a reinforcing rib 31 along the extending edge of the blade 27 between the beveled ends of the vertical ribs 29.

The blade 27 is opertaed by a pair of double acting single stage hydraulic cylinders 32, one in each side of the loader assembly 18. The ends of the cylinders opposite their piston rods 33 are pivotally mounted by -pins 34 in brackets 35 located in the upper forward areas of loader assembly walls 19. A pair of toggle links 36 and 37 are pivotally connected to the extending end of each piston rod 33, one of which links is pivotally connected with a pair of brackets 38 on the upper rear area of each wall 19 by pins 39. The remaining toggle link 37 is connected with a rearwardly projecting arm 40, one of which is located on each side of the blade 27 near its edges. The arms 40 are connected with the links 37 by pins 41.

Referring now particularly to FIGURE 1, there is a tilting trash collecting bucket 42 between the loader assembly walls 19 and beneath the packer blade 27. Generally, the bucket 42 is trough shaped and has an arcuate bottom and forward wall 43, the arc of which conforms to the arcuate movement of the extending edges of the blade 27 when the bucket is in its raised or tilted position. The rear wall 44 of the bucket 42 is also arcuate, but is shaped to be scraped by the blade 27 when the latter is vraised prior to the blades pivotal movement. The bucket 42 tilts about a transverse shaft 45 to which the forward upper edge of the bucket is hingedly attached, for example, by rolling the referred to edge of the bucket around the shaft. The ends of the shaft 45 are mounted on opposite walls 19 of the loader assembly 18, but the details of the mounting are not shown.

The outer surfaces of the loader walls 19 are provided with braces of channel stock, one of which, 46, on each side, extends from the loader frame member 22 to the upper rear corner of the loader wall, another 47 from the first said brace along the loader frame member and another 48 downwardly from the same lirst said frame member along the forward edge of the previously referred to depending portion f the loader wall.

The bucket 42 is tilted by a pair of single acting single stage hydraulic cylinders S0, one on the outside of each loader assembly wall 19. Each cylinder 50 is pivotally connected at its end opposite its piston rod S1 to a bracket 52 in the corner of the first reinforcing brace 46 and the rear reinforcing brace 48 by a pin 53. See FIG- URE 3. Beneath each end of the bucket 42, and between the front Wall and bottom 43 there is a depending ear 54 having an outwardly projecting pin 55. The extending end of each piston rod 51 is connected with a pin 55 by a bearing 56.

Referring now to FIGURES, the entire loader assembly 18 may be raised by a pair of single acting single stage hydraulic cylinders 57, one on each side of the assembly. The end of each cylinder 57 opposite its piston rod 58 is pivotally connected with a rearwardly extending ear 59 on the outer surface and near the top of each body frame 16, whereas the piston rod 58 is pivotally connected with a forwardly and upwardly projecting ear -60 on the outer surface of each `first mentioned brace 46. Thus, the end of the vehicle body may be sufficiently opened when emptying the body contents.

Other details shown include a transverse end sheet 61, FIGURE l, which extends from the forward end of the assembly cover to just forwardly of the blade supporting shaft 25. Across the end of the vehicle body floor 12 there is an upturned moisture retaining plate 62, and across the rear end of the assembly cover 20 there is a depending plate 63 which serves to strengthen the assembly. For the same purpose, there is a cross member 64 between the assembly walls 19 adjacent the iirst described body cross member 17. Also shown in the drawings there are braces 65 and 66 on the outer surfaces of the assembly walls 19 along the top and rear edges thereof.

In operation, the bucket 42 is in its lowered position at the time trash is placed therein. At the same time the blade 27 is in its raised or horizontal position. The bucket is then raised and tilted by the single stage single acting cylinders 50, at which time the rear wall of the bucket is scraped by the extending edge of the blade 27.

The blade 27 is then pivoted downwardly, forcing the contents of the bucket 42 into the vehicle body 10. The last referred to action is carried out by the -single stage double acting cylindersy 32 which return the blade 27 to its raised or horizontal` position. When discharging the contents of the vehicle body 10 the latter is tilted. To assure adequate opening the cylinders 57 mounted at each end on both the body 10 and loader assembly 18 are extended to cause the loader assembly to assume the relative position shown by dotted lines in FIGURE l. After unloading and the body 10 is again level, pressure v in the cylinders 57 is released and the assembly 18 closes the body end by gravity.

What is claimed is:

1. In combination with a vehicle body having an open rear end, a loader assembly outwardly of said rear end and including side walls and a transverse trough shaped bucket therein, means pivotally supporting said bucket along its forward edge, means raising and tilting said bucket, a transverse packer blade above said bucket and received therein when the latter is raised, means pivotalp ly supporting said blade on an axis parallel with the axis of the first said means, and toggle means actuating said blade in an arc about its axis, said toggle means comprised of at least one hydraulic cylinder pivotally connected at one end to an upper forward portion of said loader assembly and having its piston rod generally rearwardly directed, a toggle link connecting the extending end of said piston rod with an upper portion of said loader assembly and another toggle link connecting said extending end of said piston rod with said blade at a location spaced from the axis of the latter and wherein said means raising and tilting said bucket inciudes a single acting single stage hydraulic cylinder outwardly of each said wall in a generally vertical position with its piston rod downwardly directed, means pivotally supporting the closed ends of said cylinders and means connecting said piston rods with the ends of said bucket near the bottom forward end portions thereof.

2. The combination defined in claim 1 and wherein said toggle means is comprised of a double acting single stage hydraulic cylinder pivotally connected at its closed endl to each upper and forward side portion of said assembly and having their piston rods rearwardly extending, an arm on the back of said blade at each end thereof, a toggle link connecting the end of each said Vpiston rod with an upper rear portion of said assembly,

and Aadditional toggle links connecting said piston rods with Said arms.

References Cited UNITED STATES PATENTS 2,151,887 3/1939 Barrett 214-83.3 2,748,964 6/ 1956 Murphy 214-803 XR 2,767,867 10/1956 Wood 214-833 ALBERT I. MAKAY, Primary Examiner

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