Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
  • E05F15/00—Power-operated mechanisms for wings
  • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
  • E05F15/41—Detection by monitoring transmitted force or torque; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
  • E05Y2900/00—Application of doors, windows, wings or fittings thereof
  • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
  • E05Y2900/53—Type of wing
  • E05Y2900/531—Doors

Definitions

• the present invention relates to a safety mechanism in a motorized device for automatically opening and closing a side sliding door of a vehicle.
• the latter is usually hung at several points, or internal arms, of the door support to pendular movable carriages in support rails: upper or lower rails of the frame extending to the vehicle interior and / or exterior center rail.
• One or more guide rollers integral with the front edge of the door, or its arms, are mobile in second inner guide rails having, at the end of the race, an oblique or bent part leading this edge against the front upright of the frame .
• the rear edge of the door can be driven similarly.
• the trolley of the outer rail is connected to the rear edge of the door by an articulated arm which, when this trolley arrives at the end-of-travel stop, performs a rotation then engaging this rear edge in the amount corresponding to the frame.
• Such a drive device must be powerful enough to be able to move the door whatever the position of the vehicle, in particular when it is tilted, and to be able to overcome the resistance due to the compression of the door seals and / or of the framework in the final closing phase. It is expected that the device will also actuate the door relatively quickly.
• the object of the present invention is a safety mechanism in a motorized device for automatically opening and closing a sliding door of a vehicle, obviating the aforementioned problems by being capable of rapidly preventing an overload within the transmission of the force of moving the door.
• this device must also be able to quickly cancel any residual force on the door after an incident, or even authorize a removal of this door to facilitate resolution of the cause of this incident.
• this device must also have a relatively simple design to increase its reliability, to facilitate and limit its maintenance, and to reduce its cost.
• a safety mechanism in a motorized device for opening and closing a sliding vehicle door comprising a linear actuator, the movable end of which is connected to the door through a lateral deflection link, characterized in that the connecting rod is a damping jack, and in that this mechanism comprises a dynamometer with spring preloaded to a threshold value and an elastic hook for connection respectively interposed in the path of transmission of the driving force between the movable end of the actuator and the door, the dynamometer being connected on the one hand to the movable end and on the other hand to the link, as well as a mechanism transforming a variation in length of the dynamometer due to a load greater than the threshold value in a displacement of a cam arranged so that this displacement undoes the connection established by the elastic hook in the che min.
• threshold value dynamometer is understood to mean a telescopic device in two parts prestressed by a spring, the length of this dynamometer varying when a force greater than that of the spring is applied to it.
• a dynamometer may include a socket inside which slides a piston connected to an outlet rod, the stroke of the piston within the socket being limited by a stop or a collar or the like, a spring being arranged either between the bottom of the socket and the piston, or between the piston and a stop formed at the inlet of the socket.
• the dynamometer works in compression
• the second case it works in traction.
• a dynamometer having two preloaded springs: one on either side of the piston, this dynamometer then working in traction and compression.
• elastic hook is understood to mean a hook of which a part is flexible or which is articulated against a spring so as to automatically return to rest in the hooking position.
• the dynamometer spring limits the force transmitted to a predetermined value.
• the length of the dynamometer varies which causes the displacement of a cam opening a hook quickly breaking the connection between the door and the automatic drive. The door then becomes free which eliminates the risk of mischief, and even allows the door to be moved back to facilitate the elimination of the problem.
• the mobile end of the linear actuator comprises two carriages: a first driving carriage directly connected to the actuator and a second driven carriage connected to the first carriage by the elastic hook, these carriages being movable along their respective rail or the same rail; and the dynamometer is connected to the driven carriage.
• the hook and the dynamometer are directly one after the other on the force transmission path, which simplifies the design of the hook release cam mechanism.
• the main parts of the safety mechanism are simple designs and directly accessible from the outside for easy maintenance.
• the linear actuator is composed of an endless screw turned by an electric motor and engaged in a thread passing through the movable driving carriage, this carriage being held in rotation by a rail, if desired this rail partially enveloping the screw endless, then, preferably, the driven carriage is mounted to slide freely along the worm between the motor and the driving carriage, and the elastic hook is in the form of a flexible blade fixed to the driven carriage and the hooking end of which engages the front edge of the driving carriage.
• this type of worm actuator equipped with a first driving carriage it is thus very simply supplemented by the addition of a second carriage freely sliding along this worm, this second driven carriage being on the one hand directly pushed by the driving carriage during its removal, that is to say during its displacement in the direction of the motor, on the occasion of a door opening, and simply pulled by the carriage leading by through the hook when advancing when closing the door.
• the dynamometer is of the type comprising an elongated sleeve inside which slides a piston connected to an outlet rod, the stroke of the piston within the sleeve being limited by a stop or a collar of the sleeve or a piston pin moving in an oblong opening of the sleeve or other similar device, a spring being arranged between the bottom of the sleeve and the piston. Then, on the one hand the end of the piston rod is connected to the driven carriage, and on the other hand the sleeve is connected to the lateral deflection link. ; or conversely the socket being connected to the driven carriage.
• This type of dynamometer is widely available commercially at reasonable cost according to a wide range of threshold value choices. It is also easily possible to design a device for calibrating this threshold value either by modifying the position of the piston end stop, or by inserting shims between one end of the spring and its corresponding bearing point. . In particular, this dynamometer can easily constitute an extension of the lateral travel link.
• This link can be a gas and / or spring shock absorber that already accepts a variation in length before triggering the mechanism. security thus momentarily decoupling the advance of the driving carriage and the advance of the door.
• the mechanism comprises a lever pivotally mounted on the elastic hook close to its hooking end, a first branch of the lever forming a cam bearing against the rail, a second branch perpendicular to the axis of rotation of the lever being connected by a rod to the part of the dynamometer, socket or piston rod, connected on the side of the door.
• FIG. 1 is a rear perspective view of the first lateral side of the safety mechanism according to the invention inserted in a motorized door opening and closing device shown partially,
• FIG. 2 is a front perspective view of the first lateral side of the mechanism of Figure 1
• - Figure 3 is a front perspective view of the other lateral side of the mechanism of Figure 1.
• a motorized device for automatically opening and closing a side sliding vehicle door This device is based on a rotary threaded rod 20 on the one hand driven at one of its ends by an electric motor not shown and on the other hand engaged in the internal thread of a driving carriage 30 prevented from turning on it -even by being guided inside a rail 10 covering the rotary threaded rod 20.
• the driving carriage 30 is connected by a connecting rod 50 to a side door element mobile vehicle, and for example a front edge of the door, or a door arm, or a door support carriage.
• a safety mechanism is provided between the driving carriage 30 and the connecting rod 50 for lateral door movement, this mechanism releasing this door very quickly in the event of jamming, resistance or other incident.
• This mechanism firstly comprises a driven carriage 32 movable freely in sliding inside the rail 10 over the rotary threaded rod 20 with which it is not meshed, this driven carriage 32 being located downstream of the driving carriage 30 , that is to say between the drive motor of the threaded rod 20 and the driving carriage 30.
• a hook blade 40 is fixed by bolts 44 on the underside of the driven carriage 32.
• the other end facing the front of the blade 40 carries a hook 42 intended to snap into the front edge of the driving carriage 30 thus joining these two carriages together.
• the front edge 43 of this hook 42 is oblique, oriented upwards, and this in correspondence with a rear lower edge 45 oblique towards the bottom of the driving carriage 30.
• the driven carriage 32 which is connected to the connecting rod 50 for connection to the door, and this by means of a ball joint 52 and a dynamometer 60.
• the dynamometer 60 comprises a socket 62 integral with the end of the connecting rod 50, this socket sliding along an internal piston 61 fixed to the ball joint 52 of the driven carriage 32.
• This socket 62 is retained at piston 61 by a pin 66 protruding orthogonally from the piston and passing through an oblong opening 68 of the sleeve, the length of this opening 68 determining the maximum stroke of the sleeve relative to the piston.
• a spring 64 housed inside the sleeve 62 bears on the one hand against the end of the piston 61 and on the other hand, against the internal bottom of the sleeve 62.
• this spring 64 already exerts a pressure force between the sleeve and the piston when these two parts are in the rest position apart, that is to say that the pin 66 is in starting stroke abutment within the oblong opening 68 such as illustrated in this FIG. 1.
• the dimension of this dynamometer 60 only begins to reduce under the influence of a compressive force greater than that already exerted by the spring 64.
• the mechanism according to the invention further comprises a lever mounted mobile in rotation in a bearing 80 integral with the internal face of the hook blade 40 as best seen in FIG. 3.
• the first lever arm 82 is connected by a rod 74 at an attachment point 72 secured to the movable sleeve 62.
• the second lever arm is in the form of a cam 84 of arcuate shape bearing against an edge 12 of the rail 10.
• the shape of the bearing face of this cam 84 is such that a rotation of the first lever arm 82 forces the bearing 80 away from the edge 12 of the rail 10, that is to say a separation of the hook 42.
• the threaded rod 20 is turned in a direction such that the driving carriage 30 is advanced in the direction of the arrow referenced Av.
• the driving carriage 30 then drives, by means of the hook 42 and the blade 40, the carriage 32 also driven forward.
• This driven carriage 32 also drives the dynamometer 60 and the connecting rod 50 forward, pushing the door forward until it closes.
• the connecting rod 50 is a gas and / or spring shock absorber whose compression force is of the order of 100 N.
• the door can then easily be moved in the opposite direction, the driven carriage 32 sliding freely within the rail 10 over the threaded rod 20. No more force being exerted on the dynamometer 60, it has resumed its initial length, which brought the cam 84 into the rest position, therefore the hook 42 in position, but at the rear of the driving carriage 30. However, it then suffices to manually advance the door once released from any constraint to that the latter carries with it the driven carriage 32 forward until the oblique front edge 43 of the hook 42 comes into contact with the lower oblique downward edge 44 of the driving carriage 30 allowing the hook to pass under the underside and then reset to the front edge of the driving carriage 30.
• this safety mechanism implements a reduced number of parts of relatively simple design and easily accessible from the outside for maintenance.
• the manual actuation of the interior or exterior handle of the door when the latter is closed induces in the drive device sufficient force to immediately trigger the security mechanism of the door and release the latter when opening. The mechanism is then automatically reset when the door is next closed.
• the driven carriage 32 is arranged on an independent smooth rod underlying the threaded rod 20.
• the leaf spring 40/42 can then be oriented upwards with the hook engaging in a lateral housing of the upper driving carriage 30.
• the dynamometer piston has a head connected by a rod of smaller diameter to the ball joint 51. can then arrange a pre-compression spring on either side of the piston so that the dynamometer then works both in traction and in compression.
• the arrangement of the linkage kinematics 74 / lever arm 82 / cam 84 should therefore be appropriately modified so that the hook of the driven carriage is released from the driving carriage as soon as an overload appears, either at the opening or when the door closes.

Landscapes

• Power-Operated Mechanisms For Wings (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9514636

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (7)

• 1997
  • 1997-12-09 FR FR9715891A patent/FR2772066B1/fr not_active Expired - Fee Related
• 1998
  • 1998-12-08 WO PCT/IB1998/001952 patent/WO1999029993A1/fr not_active Ceased
  • 1998-12-08 CA CA002319682A patent/CA2319682A1/fr not_active Abandoned
  • 1998-12-08 EP EP98955845A patent/EP1038084A1/de not_active Withdrawn

Non-Patent Citations (1)

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