Refuse truck body having load carrying ejector panel

Abstract: A refuse truck body for attachment to a "low entry cab chassis". This truck body (24) includes a container having an open forward end and an open rear­ ward end. A tailgate or cap is provided for releas­ ably closing the open rearward end. The container further includes an ejector platen (54) mounted for longi­ tudinal movement within the container. The platen is moved between a retracted position near the front of the truck and an ejection position near the rear of the truck by a linear actuator (60) mounted generally horizontally above the ejector platen. The ejector platen has a triangular cross-section when viewed from the side, and extends partially underneath the refuse, thus allowing the load of refuse to be carried forward of the container proper, to more efficiently use the area behind the low entry cab and over the engine and transmission.

Description: The invention relates to a refuse collection truck according to the preamble part of claim 1. It is common for a refuse truck to include an ejector platen, hydraulically or otherwise actuated, for ejecting the refuse from the truck. Generally, this platen is simply a flat vertically oriented panel, resting at one end of the truck body, and a hydraulic cylinder is provided for moving the platen towards the opposite end of the truck body. This hydraulic cylinder is, for example, generally oriented diagonally. In a truck of the type as shown in US-A-3 351 222 the hydraulic cylinder activating the ejector platen is oriented horizontally close to the bottom of the container, thus wasting substantial room within the container which could be better put to use by carrying increased loads. Furthermore, with the availability of the so-called "low entry cab chassis", wherein the cab is positioned entirely forward of at least a portion of the engine, a substantial amount of room became available immediately behind the cab, which area was wasted on said known trucks. It is a task of the invention to improve a truck as described in the preamble part of claim 1 so that it is adapted to carry an increased load, which load is more evenly distributed on the wheels of the truck. This can be achieved with the features of the characterizing part of claim 1. The design of the ejector platen allows part of the load to be carried in the area directly behind the cab. In the retracted position of the ejector platen, the ejector platen not only does not take up space within the container, but actually effectively increases the size of the container over that provided by prior art refuse trucks, which is clearly a desirable effect. Another advantage of the ejector platen construction is that the space above the transmission, air-cleaner and engine of the truck may be used to carry refuse when the truck is in use. Furthermore, said ejector platen construction provides more even distribution of the refuse load when used with the low entry cab chassis, distributing more of the weight of the load onto the front wheels. When maintenance is necessary on the truck, the engine, air-cleaner and transmission may be easily accessed without the need to raise the body by moving the ejector platen rearward a few feet. Conventional trucks as well as an embodiment of the truck according to the invention are shown in the drawings. In the drawings: Fig. 1 is a side cross-sectional view of a prior art refuse truck body having an ejector panel with a diagonal cylinder. Fig. 2 is a side cross-sectional view of a prior art refuse truck body having an ejector panel with a horizontal cylinder positioned along the bottom of the body. Fig. 3 is a side view of a refuse truck having an ejector panel constructed according to one embodiment of the invention in a retracted position. Fig. 4 is an enlarged side view of the ejector panel and certain associated apparatus as shown in Fig. 3, partially in section, showing the ejector panel in its retracted position, and in phantom in its ejection position. Fig. 5 is a cross-sectional view of Fig. 4, taken along line 5-5 thereof. Fig. 6 is a side view of a refuse truck having an ejector panel the same as that shown in Fig. 3, showing the ejector panel in its ejection position. Referring now to Fig. 3, there is shown a refuse truck 10 of a so-called "low entry cab" configuration. That is, the refuse truck 10 includes a chassis 12 having at least two front wheels 14 and two rear wheels 16, and a cab 18 which is located entirely forward of at least part of the front wheels or engine. Generally in a low entry cab chassis such as the one shown here, an air cleaner 20 and engine or transmission 22 are located just behind the cab 18, as shown. A refuse body 24 is mounted on the chassis 12, just behind the transmission 22. The refuse body 24 includes a container 26 which is open at each end. The rearward end 26a is closed conventionally by a closable tailgate apparatus 28, which may conventionally include other apparatus such as devices (not shown) for dumping refuse containers, and devices for compacting the refuse, as disclosed in U.S. Patent No. 4,690,607, assigned to the assignee of the present invention. Generally, when the refuse body 24 is to be emptied, this tailgate 28 is opened as shown in Fig. 6 and the refuse is forced out of the container 26 by an ejector panel assembly 30. The portions of the refuse body 24 set forth up to this point are generally conventional. However, as can be seen by reference to Figs. 1 and 2, the prior art trucks shown have had ejector panel assemblies which took up space within the respective container, thereby reducing the effective load capacity of the container and hence the truck, and wasting the space behind the low entry cab. That is, referring now to Fig. 1, the refuse truck 32 shown there had an ejector panel 34 positioned inside the container portion 36 of the truck body 38. This ejector panel 34 was actuated by one or more hydraulic cylinders 40 arranged diagonally within the truck body 38. The ejector panel 34 itself presented a diagonal front face 34a to the refuse inside the truck body 38, so as to provide maximum room within the body considering the position of the cylinders 40. An improvement to the truck body 38 shown in Fig. 1 is illustrated in Fig. 2. In that prior art design for a refuse truck 42, (Known from US-A-3 351 222) one cylinder 44 is positioned flat on the floor of the body 46. The cylinder 44 is connected to and moves an ejector panel 48 which was clearly shaped much more efficiently, having only a small diagonal portion 48a near the front of the body 46, a vertical portion 48b adjacent the front and a long but very low cylinder cover portion positioned over the cylinder 44 itself. While this ejector panel 48 did take up less space within the truck body 46 than did the ejector panel 34 shown in Fig. 1, allowing for relatively more usable load carrying space therein, it still took some space out of the body 46 that would have been better used carrying refuse. The embodiment shown in Fig. 2 also had the disadvantage that refuse may tend to hang up on the flat surface over the cylinder, sometimes referred to as the "doghouse". Further, the cabs 50 and 52 respectively of the truck 32 shown in Fig. 1 and the truck 42 shown in Fig. 2 were of the conventional type, with the body 38 and 46 in each case having a vertical front end which butts up against the cab, and the cab has a corresponding vertical rear surface. When a chassis 12 having a low entry cab 18 is used as is the case in the present invention, as shown in Fig. 3, there is space forward of the front of a conventional body and above the air cleaner 20 and transmission 22 of the subject truck chassis which would not be put to use, that is, would be wasted, by simply attaching a conventional body having a conventional ejector panel to that chassis. Referring now to Figs. 3, 4 and 5, the body 24 constructed according to the invention includes an ejector panel assembly 30, referred to in general terms above. In the preferred embodiment of the present invention, this assembly 30 includes an ejector panel 54 which is moved between a retracted position, shown in Fig. 3, and an ejection position adjacent the rearward end 26a of the refuse container portion 26 of the body 24, as shown in Fig. 6 and in phantom in Fig. 4. The ejector panel 54 has a triangular cross-section when viewed from the side, and extends partially underneath the refuse. Accordingly, the panel 54 includes a lower diagonal portion 54a as its forwardmost end. The ejector panel 54 further includes triangular closed side panels 54b, one on each side, and a top panel 54c. A panel support frame 56 is provided to give support and rigidity to the ejector panel 54. The panel support frame 56 includes a bottom bar 62, a pair of rear side members 64 and a rear top bar 66, connected together to form, generally, a rectangle. The panel support frame 56 further includes a pair of front side members 68, which angle from their connection at their lower ends to the bottom bar 62, forward and upward to a connection at their upper ends to a front top bar 70. Front top bar 70 is connected to rear top bar 66 by the top panel 54c, which acts as a web to which the two top bars correspondingly act as flanges, resulting in improved strength. The body 24 is constructed with a set of tracks 72, which run the length of the body, along the tops of both inside sides of the body. Correspondingly, there are bearing means, such as shoes 74, at each end of each top bar 66 and 70, which shoes bear on and run or are movable along the respective track 72. By means of these shoes 74 and tracks 72, the ejector panel 54 is moveable lengthwise within the body 24. The positioning of these shoes 74 and tracks 72 at the top of the body 24 and ejector panel 54 reduces the instance of abrasion and wear caused by any abrasive materials which may be found in the refuse, since the shoes and tracks are positioned generally above and out of reach of the refuse. An actuator support frame 58 is attached to the top front end 24a of the body 24. This actuator support frame extends generally horizontally forward of the body 24, and may even extend partly over the cab 18 in some instances. To the forwardmost end of actuator support frame 58 is pivotably attached one end of at least one linear actuator 60, which may be a hydraulic cylinder. The opposite end of the actuator 60 is attached to panel support frame 56. Thus actuating the actuator 60 provides the power to move the ejector panel 54 from its retracted position to its ejection position, effectively ejecting the refuse from the container 26. Actuating the actuator 60 in the reverse direction then returns the ejector panel 54 to its retracted position.

Claims: A refuse collection truck (10) having front and rear wheels (14, 16) and a cab (18) positioned forward of said front wheels (14, 16), a truck body (24) adapted to receive and compress a load of refuse, comprising: a container (26) having an open forward end and an open rearward end (26a); a tailgate (28) for releasably closing said open rearward end; an ejector platen (54) mounted for longitudinal movement within the container (26) between a retracted position nearer the front of the truck and an ejection position nearer the rear of the truck, said ejector platen (54) having a cross-section such that a portion thereof is positioned underneath part of the load; and a power means supported outside said container (26) for moving said ejector platen (54) longitudinally within said container (26) between said retraction position and said ejection position, characterized in that said eject platen (54) is triangular in the longitudinal section of the truck and its retraction position is positioned such that it carries at least a portion of the load forward of said forward end of said container (26). A refuse collection truck as in claim 1, characterized by track means (72) mounted to the top inside of said container (26), and by bearing means (74) mounted on said ejector platen (54) and movable along said track means (72). A refuse collection truck as in claim 1, characterized by an actuator support frame (58) mounted at the forward end of said container (26) outside said container (26), onto which said power means in the form of a linear actuator (60) is mounted.

Inventors: SMITH FRED P, SMITH FRED T, SMITH FRED P., SMITH FRED T.
Applicants: HEIL CO, THE HEIL CO.
Application year: 1990
Main classification: B65F3
IPC codes: B65F3