Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
  • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
  • B60P1/64—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable
  • B60P1/6418—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar
  • B60P1/6463—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar fitted with articulated beams for longitudinal displacement of the container

Definitions

• Lifting device in particular for a removable dump truck
• the invention relates to a hauling device. for example for a removable dump truck. It is known practice to use a truck equipped with a mechanism enabling it to place the container or bucket it was transporting on the ground. Conversely. this mechanism allows the truck to pick up the container or bucket placed on the ground and load it on the back of its chassis in order to transport it.
• a mechanism is provided by one or more hydraulic lifting cylinders.
• the maximum force that is to say when the towing arm lifts the front of the bucket still placed on the ground, the jacks must be supplied with hydraulic pressure which is sometimes very high. This makes it necessary to oversize various mechanical components, that is to say to increase the dead weight of the vehicle.
• the mechanism must be dimensioned and positioned on the truck according to both the type of truck and the type of load to be handled.
• the structure of the loading mechanism must be calculated according to the weight and dimensioning characteristics of the container, failing which, after loading onto the truck, the center of gravity of the container could be placed too far forward or too far back from the optimum position which would correspond to a good weight distribution between the truck's axles.
• the object of the invention is to avoid these drawbacks and to produce a loading device capable of being manufactured according to a standard model in order to then be mounted as it is on trucks of various types, for loading containers or platforms. also various types.
• a handling device intended to equip the chassis of a container truck, this device comprising a bent arm terminated at its top by a hook capable of adapting to the front vertical face of a container, while the rear of the arm is articulated on the front of a tilting sub-frame where it is likely to come into abutment under the action of at least one jack connecting this arm to the front of the truck chassis, while finally the rear of the subframe is itself articulated on the chassis, and it is characterized in that the point of articulation of the rear of the subframe on the chassis is in front of the rear end of the chassis, from which it is separated by a distance approximately greater than or equal to 0.5 times that of the two front and rear articulation axes carried by the subframe.
• this arrangement makes it possible, on the one hand to best size the lever arms to limit the maximum hydraulic pressures, on the other hand, to build the lifting mechanism in the form of a standard, adaptable module. as is on various types of trucks to handle various types of containers.
• the company responsible for adaptation will calculate the aforementioned distance according to which the rear axle of the subframe is located in front of the rear end of the chassis, taking only takes into account the position required for the center of gravity of the container when it is placed on the truck in the transport position.
• FIGS. 1 to 3 are side views showing a standard modular mechanism in three successive stages of its operation for loading a container onto a truck (start, change of axis of rotation, and end) or on the contrary to place it on the ground.
• FIGS. 4 to 6 are similar views corresponding to another modular mechanism, and FIG.
• FIG. 7 is a diagram showing that the mechanism of the invention makes it possible to considerably reduce the maximum hydraulic pressure in the jacks (in particular, all other things being equal.
• an apparatus known from French Patent 2,185,520 corresponds to a pressure peak of 350 bars curve in dotted lines - while the corresponding mechanism according to the invention reduces this peak to only 200 bars - curve in solid lines -) .
• the figures show a truck 1 intended to transport a container 2 or other similar burden. For this is provided on the chassis of the truck 1, a lifting device, entirely located above said chassis, which includes a bent arm 3, terminated at its top by a hook 4. The latter is designed to come to adapt on a transverse lifting axis 5, equipping the front vertical face of the container 2.
• the bent arm 3 is articulated by an axis 6 on the front of a tilting sub-frame 7 where it is likely to come to abut at 8 (FIG. 2) under the action of at least one jack. lifting device 9.
• the lifting jack (s) 9 connect an axis 10 of the bent arm 3 to an axis 11 located at the front of the chassis of the truck 1.
• This arm is in fact double bent since it comprises three sections, a section arranged vertically in the configuration of the loaded bucket, a section arranged horizontally in this same configuration, and an inclined section for connection to the subframe by which this arm abuts against the subframe in the configuration of start of loading; the jack 9 is articulated on the arm inside this bend (connection section / horizontal section).
• a pivot 12 is provided substantially in front of the rear end 14 of this chassis, the end from which it is separated by a dimension 13.
• This distance 13 is approximately between 0.5 and 1 times the distance 15 separating the two axes of articulation 6 and 12 (for reasons of readability, this ratio is shown to be less than 0.5 in FIGS. 1 to 3).
• a preferred solution consists in providing that the distance 13 is of the same order of magnitude as the distance 15.
• point 20 corresponds to the position for which the hook 4 is about to come into contact with the lifting axis 5 ( Figure 1);
• point 21 corresponds to the instant of the trajectory where the tilting subframe 7 comes to bear on the chassis of the truck 1 (FIGS. 2 and 5);
• the sub-frame is slightly inclined (less than 60 ° or even 45 °) relative to the horizontal, the axis 6 remaining substantially in front of the axis 12. This corresponds to a low angular amplitude during the first loading phase: rotation around the axis 12.
• the articulation point 10 of the arm cylinder is behind from axis 6 and in front of axis 12; while the arm is still clearly tilted back so that the second loading phase corresponds to a significant rotation of the arm with raising and lowering of the bucket.
• the horizontal section is higher than the substantially rectilinear subframe and generally parallel to the ground.
• the center of gravity is substantially in front of the axis 12, and approximately perpendicular to the axis 6 with respect to which it remains substantially always behind during the maneuver.
• the position of its center of gravity 26 on the chassis of the truck 1 depends only on the value of the length 13 chosen for assembly when the device 3, 7 has been fixed, 9 on the chassis of the truck 1.
• this device 3, 7, 9 is considered here as a standard assembly with a predetermined distance between the axes 11 and 12 of articulation to the chassis 1 of the truck, it can be mounted on trucks 1 of various types, remaining master of the distribution of the loads on the two axles 27 and 28 of the truck 1 after loading.
• a large value will be chosen for the distance 13 (FIG.

Landscapes

• Engineering & Computer Science (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Refuse-Collection Vehicles (AREA)
• Handcart (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9342562

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• 1986
  • 1986-12-31 FR FR8618524A patent/FR2609011B1/fr not_active Expired
• 1987
  • 1987-12-31 EP EP87403016A patent/EP0276620A1/de active Pending
  • 1987-12-31 EP EP19880900700 patent/EP0294463A1/de not_active Withdrawn
  • 1987-12-31 WO PCT/FR1987/000525 patent/WO1988005000A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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