FR2843344A1 - Opening and closing device for pivoting door of skip vehicles comprises air controlled actuator whose piston pivots toothed sector meshing with toothed wheel integral with door - Google Patents

Abstract

The opening and closing device for the pivoting door (4) comprises an air controlled actuator (9). It comprises a toothed sector (6) pivoting under the force of the actuator piston (11) and power transmission by a toothed wheel (8) integral with the door meshing with the toothed sector. An Independent claim is included for a skip vehicle.

Description

The present invention relates to an opening and closing device

  pivot door and a dump vehicle with a pivot door and

  including such a device of the invention.

  The invention will particularly find its application for tipper vehicles, in particular for the transport of armourstone.

  This field of application is however in no way limitative of the invention.

  Various pivoting door actuation mechanisms are already known

for vehicle.

  In particular, document FR-A-1 057 541 presents a device for a door hinged with respect to a bucket having a plurality of rods cooperating to form the articulation. Such a device is complex because it requires a multiplicity of connection points in rotation and causes the displacement of rods which can

  cause significant congestion.

  Document FR-A-1 433 109 also discloses a mechanism for the i5 control of a tipper body door. This prior art presents hydraulic cylinders and a hydraulic circuit, as well as a system of connecting rods including the pivot

  ensures the opening or closing of the door.

  As in the previous case, the use of a set of connecting rods to

  achieving actuation involves a large footprint, low reliability of 20 lI 'the entire mechanism.

  The present invention overcomes the drawbacks of the devices known hitherto. In particular, it ensures high efficiency of

  door opening and closing mechanism.

  It has the advantage of combining the use of a jack with a gear system 25 ensuring good power transmission and good reliability.

  Another advantage of the invention is that it is compact and can easily be installed on the side walls of the vehicle inside a

small fairing.

  Other objects and advantages will become apparent from the following description of a preferred embodiment of the invention.

  The present invention relates to a device for opening and closing a pivoting door as well as a dump vehicle comprising a pivoting door and

  including such a device of the invention.

  It comprises a toothed sector pivoting under the drive of the piston of the air cylinder and means of power transmission by gears between the sector

toothed and the door.

  This device may be presented according to the variants set out below: - The means of power transmission by gears, are constituted by a toothed wheel secured to the door and meshing with the toothed sector, - The toothed sector and the piston are connected by a pivot link ,

  - The cylinder body is pivotally mounted relative to a support.

  The invention also relates to a tipper vehicle comprising a pivoting door, and at least one device according to the invention for opening and closing

of the pivoting door.

  This vehicle may advantageously be presented according to the embodiments introduced below: - It comprises at least one device for opening and closing the pivoting door, - It comprises two devices placed on either side of the door pivoting, - The pivot axis of the door is located in the lower part of the bucket, - The door has a height less than that of the bucket, - 11 has a secondary flap of height complementary to that of the door relative to the height of the bucket and pivoting with respect to a transverse axis in the upper part of the bucket. The attached drawings are given by way of examples and are not limitative of the invention. They represent only one embodiment of the invention and

  will make it easy to understand.

  Figure 1 illustrates a side view of a dump vehicle capable of receiving a

device of the invention.

  Figure 2 shows more precisely the rear part of a dump vehicle. Figure 3 is a partial view, and Figure 4 shows another phase of

  movement of the device of the invention.

  There is shown in Figure 1 a vehicle 1 equipped with a bucket 2 here pivotally mounted by means of a tilt cylinder 3 placed substantially in

the front part of the bucket 2.

  The bucket 2 fitted to the vehicle 1 comprises a door 4 pivotally mounted substantially along an axis located in the lower part of the bucket 2. This example is not

however not limiting.

  The pivoting movement of the door 4 is ensured by means of at least one device 5 and preferably by two devices 5 placed on either side

  on the other side of the rear part of the bucket 2.

  A preferred embodiment of such a device 5 is illustrated in FIGS. 2 to

4 more precisely.

  In particular, Figure 3 shows the formation of a cylinder 9 having a body and a piston 11 adapted to translate relative to the body 10. The end of the piston

  11 is also connected to a toothed sector 6 via a pivot connection.

  The toothed sector 6 is itself mounted in rotation about an axis 7. The example of representation of the toothed sector 6 is not limiting and one could also

  constitute a toothed element of 360, forming a toothed wheel.

  The toothed sector 6 constitutes a primary gear element capable of transmitting the power deployed by the jack 9 for the purpose of opening or

door closed 4.

  This power transmission is ensured by gear elements

  can be achieved in a simple manner by a single toothed wheel 8 mounted integral 20 with the pivoting door 4 at its axis of rotation.

  Depending on the desired reduction, it is also possible to form a

  chain of gears between the toothed sector 6 and the toothed wheel 8.

  Figures 2 and 4 show two phases of movement of the device 5 according to

  the invention. It can be seen that the angular position of the body 10 of the jack 9 changes between these two figures.

  Indeed, to ensure a good sequence of movements, the body 10 of the jack is pivotally mounted relative to a support 15, for example formed by a

  side integral with the bottom of the bucket.

  According to a preferred variant, in addition to the door 4, a secondary flap 30 14 is formed capable of closing the upper part of the rear opening of the bucket 2 and having for this purpose a height complementary to that of the door 4 which does not covers here

  than the bottom of the rear opening.

  For example, the secondary flap 14 is pivotable relative to a transverse axis located in the upper part of the bucket without opening mechanism. Its opening is operated naturally during the tilting of the bucket 2, if the latter is

tilting climb.

  The operation of the device is particularly reliable and efficient.

  In Figure 2, there is shown a particular position of the door 4 at the start of opening. In this context, the piston 11 of the jack 9 begins its movement of

  translation so as to induce rotation of the toothed sector 6 around the axis 7.

  This rotation also causes the rotation of the toothed wheel 8 which is integral with

  door 4. Consequently, door 4 tends to open.

  During this movement, the body 10 of the jack 9 undergoes a slight pivot for

  reach the position illustrated in figure 4.

  To ensure closure, the cylinder 9 is controlled in the opposite direction to retract the piston 11 and operate a reverse rotation movement of the toothed sector 6

and the gear 8.

  To ensure all of these operating phases, the jack 9 is advantageously controlled by design control means

  current and actuated from inside the cabin of vehicle 1 by the user.

REFERENCES

  1. Vehicle 2. Tipper 3. Tilting cylinder 4. Door 5. Device 6. Toothed sector 7. Pivot axis 10 8. Toothed wheel 9. Cylinder 10. Body 11. Piston 12. Pivot link ls 13. Rotation axis 14. Pane 15. Support

Claims (9)

  1. Device for opening and closing a pivoting door (4) for a vehicle (1) with a bucket, comprising a jack (9) controlled, characterized by the fact that it comprises a toothed sector (6) pivoting under the drive of the piston (11) of the jack (9) and means of power transmission by gears between the toothed sector (6) and the door (4).   2. Device according to claim 1, characterized in that, the power transmission means by gears are constituted by   a toothed wheel (8) integral with the door (4) and meshing with the toothed sector (6).   3. Device according to any one of claims 1 or 2, Characterized by the fact that,   The toothed sector (6) and the piston (11) are connected by a pivot link (12).   4. Device according to any one of claims I to 3, Characterized by the fact that   The body (10) of the jack (9) is pivotally mounted relative to a support (15).   5. Tipper vehicle (1) comprising a pivoting door (4) Characterized by the fact that   It comprises at least one device according to any one of claims 1   to 4 for opening and closing the pivoting door (4).   6. Vehicle (1) according to claim 5, characterized in that   It comprises two devices according to any one of claims 1 to 4   placed on either side of the pivoting door (4).   7. Vehicle (1) according to claim 4 or claim 5, characterized in that   The pivot axis of the pivoting door (4) is located in the lower part of the bucket 30 (2).   8. Vehicle (1) according to claim 7, characterized in that   The pivot door (1) at a height lower than that of the bucket (2).   9. Vehicle (1) according to claim 8, characterized in that it comprises a secondary flap (14) of height complementary to that of the pivoting door (4) relative to the height of the bucket (2) and pivoting by compared to   a transverse axis in the upper part of the bucket (2).