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EP-4464529-B1 - COCKPIT DOOR GUIDING DEVICE

EP4464529B1EP 4464529 B1EP4464529 B1EP 4464529B1EP-4464529-B1

Inventors

  • BOGE, Anthony

Dates

Publication Date
20260513
Application Date
20240422

Claims (10)

  1. A guidance device (4) for a door (3) configured to connect said door (3) to a driving cab (2) of a machine, notably of an agricultural machine (1), the cab (2) comprising a side wall (20) delimiting an opening (22) and a top (24), the door (3) of the cab (2) being movable between a closed position in which said door (3) closes the opening (22) of the cab (2) and an open position wherein said door (3) leaves the opening (22) of the cab (2) free, the device (4) comprising: - a rail (40) fixed on the top (24) of the cab (2) and extending according to a longitudinal axis of the cab (2); - a first rolling member (42a) in sliding connection with the rail (40) and a second rolling member (42b) in sliding connection with the rail (40); - a first connecting rod (43a) in pivot connection according to a first vertical axis of the cab (2) with the first rolling member (42a) and in pivot connection according to a second vertical axis of the cab (2) with an upper upright (30) of the door (3), and a second connecting rod (43b) in pivot connection according to a third vertical axis with the second rolling member (42b) and in pivot connection according to a fourth vertical axis with the upright (30) of the door (3); the guidance device (4) comprises a first cam (44) fixed to the cab (2) on the top (24) and toward the inside relative to the rail (40), the first cam (44) presenting a first portion (441) extending parallel to the rail (40) and a second portion (442) curved in the direction of the rail, the first connecting rod (43a) being in sliding connection with the first cam (44), the guidance device (4) being configured so that, to move from the open position to the closed position, the door (3) of the cab (2) describes a first longitudinal movement in translation relative to the cab (2) when the first connecting rod (43a) travels on the first portion (441) of the first cam (44), and that the door (3) of the cab (2) describes a second movement in translation toward the opening (22) of the cab (2) when the first connecting rod (43a) travels on the second portion (442) of the first cam (44), the first and second connecting rods (43a, 43b) pivoting respectively relative to the first and second rolling members (42a, 42b); characterized in that the guidance device further comprises a control means (46) for the second connecting rod (43b) relative to the first connecting rod (43a) so that the first and second connecting rods describe a same movement.
  2. The guidance device (4) according to claim 1, characterized in that the mechanical control means (46) is a second cam (46) fixed to the cab (2) on the top (24) and towards the inside relative to the rail (40) and presenting a first portion (461) extending parallel to the rail (40) and a second portion (462) curved in the direction of the rail (40), the second connecting rod (43b) being in sliding connection with the second cam (46).
  3. The guidance device (4) according to claim 2, characterized in that the first portion (461) of the second cam (46) comprises a stop (47) configured to be in contact with the second connecting rod (43b) when the door (3) of the cab (2) is in the open position.
  4. The guidance device (4) according to claim 2 or 3, characterized in that the first cam (44) and the second cam (46) are aligned according to the longitudinal axis of the cab (2).
  5. The guidance device (4) according to claim 2 or 3, characterized in that the second connecting rod (43b) presents a length greater than a length of the first connecting rod (43a), the second cam (46) being at a greater distance from the rail (40) relative to the first cam (44).
  6. The guidance device (4) according to any one of the preceding claims, characterized in that each of the connecting rods (43a, 43b) comprises a long portion and a short portion so as to present an L-shaped geometry, the first vertical axis and the second vertical axis being positioned at the intersection of the two portions of each of the connecting rods (43a, 43b) and the third vertical axis and fourth vertical axis being positioned at a free end of the short portion of each of the connecting rods (43a, 43b).
  7. The guidance device (4) according to any one of the preceding claims, characterized in that it comprises at least a third cam (47) fixed to an underside (26) of the cab (2), the door (3) of the cab (2) further comprising a lower upright (34) vertically opposite the upper upright (30), the lower upright (34) being in sliding connection with the third cam (47) along a longitudinal axis.
  8. A driving cab (2) comprising a side wall (20) delimiting an opening (22) and further comprising a door (3) movable between a closed position in which said door (3) closes the opening (22) of the cab (2) and an open position in which said door (3) leaves the opening (22) of the cab (2) free, the driving cab (2) further comprising a guidance device (4) according to any one of claims 1 to 7 connecting the door (3) to the driving cab (2).
  9. The driving cab (2) according to claim 8, characterized in that the cab (2) comprises pressurization means for said cab (2).
  10. An agricultural machine (1), notably a straddle tractor for vineyards, comprising a driving cab (2) according to any one of claims 8 to 9.

Description

TECHNICAL FIELD The present invention relates to the technical field of agricultural machinery. More specifically, the invention relates to the technical field of driver's cabs for agricultural machinery and aims at a device for guiding the opening and closing of doors of such driver's cabs. STATE OF THE ART Typically, a driver's cab, particularly for agricultural machinery such as a straddle tractor operating between rows of vines, consists of a side panel enclosing an opening and a movable door. This door can be set between a closed position, where it seals the cab opening, and an open position, where it allows the cab opening to move freely. This allows a user to access the driver's cab and the operator's position on the agricultural machinery. To meet regulatory requirements, the driver's cab includes pressurization equipment, which necessitates that the door, when closed, seals the cab opening airtight. The transition between the open and closed positions of the door is achieved using a door guide system. Several guide movements are commonly used. The guide can be "swing," meaning the door is mounted on hinges and pivots around a vertical axis of the hinges, or "sliding," meaning the door is mounted on tracks and moves along a longitudinal axis of the cabin. Finally, the guide can be "sliding," meaning the door moves away from the cabin as it transitions from the closed to the open position. In the case of a straddle tractor in vineyards, the driver's cab may be located between two rows of vines, at the same height as the vegetation in the rows. In this configuration, the lateral space that the cab door can occupy when open within the row is limited, which complicates the use of a swing or sliding guidance system and makes a sliding door guidance system preferable. However, such a sliding guidance system has the disadvantage of being less airtight when the door is closed, which is a major obstacle to pressurizing the driver's cab to meet regulatory requirements. The invention therefore aims to resolve all or part of the drawbacks of the prior art ( JP 2017 159815 A , FR 2 892 142 B1 And FR 3 068 723 A1 ), by proposing a swerving type guidance device providing a significantly reduced transverse footprint and a seal allowing simple pressurization of the cockpit. PRESENTATION OF THE INVENTION More specifically, the invention relates to a door guidance device configured to connect said door to the driver's cab of a machine, in particular an agricultural machine, the cab comprising a side wall delimiting an opening and a top, the cab door being movable between a closed position in which said door closes the cab opening and an open position in which said door leaves the cab opening free, the device comprising: a rail fixed to the top of the cabin and extending along a longitudinal axis of the cabin; a first rolling element in sliding connection with the rail and a second rolling element in sliding connection with the rail; a first connecting rod in pivot joint along a first vertical axis of the cabin with the first bearing element and in pivot joint along a second vertical axis of the cabin with an upper pillar of the door, and a second connecting rod in pivot joint along a third vertical axis with the second bearing element and in pivot joint along a fourth vertical axis with the pillar of the door. Furthermore, the guiding device includes a first cam fixed to the cabin on top and inwards relative to the rail, the first cam having a first portion extending parallel to the rail and a second portion curved towards the rail, the first connecting rod being in sliding connection with the first cam, the guiding device further including a means of controlling the second connecting rod relative to the first connecting rod so that the first and second connecting rods describe the same movement, the guiding device being configured so that, to move from the open position to the closed position, the cabin door describes a first longitudinal translational movement relative to the cabin when the first connecting rod travels on the first portion of the first cam, and that the cabin door describes a second translational movement towards the cabin opening when the first connecting rod travels on the second portion of the first cam, the first and second connecting rods pivoting respectively relative to the first and second rolling members. Thanks to this combination of features, such a guiding system reduces the door's lateral clearance both when open and closed. This is achieved by adjusting the length of the connecting rods and cams so that the door slides along the rail as close as possible to the outside of the cab's side wall. Furthermore, when the door closes, the movement of the first connecting rod within the curved portion of the cam towards the rail causes the connecting rods to pivot relative to the bearings. This pivoting is followed, or occurs simultaneously, by a pivoting of the door frame relative to the conne