ITTO20090053A1 - ELECTROMECHANICAL CONTROL DEVICE FOR ROTO-TRANSLATING DOORS. - Google Patents

Description

Electromechanical control device for swinging doors

DESCRIPTION

Technical sector

The invention relates to an electromechanical control device for roto-translating doors.

More precisely, the invention relates to an electromechanical control device for pivoting-translating doors of vehicles, in particular buses, minivans and the like.

Note Art

Control devices for pivoting sliding doors of passenger vehicles, such as buses and minivans, of the electromechanical type are known in the art.

These devices are generally equipped with an electric motor, a gear reduction unit to obtain the desired transmission ratio and a control unit to control the opening and closing of the door by means of a rod and a pair of arms. associated with it.

An example of a device of the above type is described in ES 2070706.

For safety reasons, doors of the above type must be able to be opened even in the event of a fault in the control device. For this reason, the control devices currently used incorporate a release system, which disengages the electric motor from the reduction unit.

An example of these emergency release systems is described in EP 1072749.

These release systems are generally operated by means of a pair of safety handles arranged one inside and one outside the vehicle.

One of the drawbacks of known devices derives from the need to make a considerable effort in the event of an emergency, when it is necessary to disengage the device to allow manual opening of the door.

This drawback is particularly serious if you consider that the door must be able to be opened easily in an emergency even by a child or an elderly person.

A further drawback of the known art derives from the complexity of the solutions adopted up to now, which for this reason require frequent maintenance and high manufacturing costs.

Not the least drawback of known devices derives from the need to obtain a sufficient reduction ratio to allow the use of motors of lower power or in any case to avoid overloads on the motor and lengthen its useful life. Obtaining an adequate reduction ratio, however, entails the preparation of a cascade of gears which is all the more cumbersome the higher the reduction ratio is and from this it derives or the impossibility of obtaining adequate reduction ratios when it is desired to keep the gear compact. • footprint of the device or the need to increase the size of the device enclosure.

The invention aims to solve the aforementioned drawbacks by providing an electromechanical control device for roto-translating doors, which can be disengaged easily and with minimum effort and which can be produced industrially at advantageous costs.

Description of the Invention

Advantageously, thanks to the fact that the motor unit is mobile rather than fixed, it is possible to configure said motor unit so that the disengagement between the motor unit and the coupling unit can be obtained by applying a reduced effort compared to the devices of the art. Note.

In particular, thanks to the fact that said clutch assembly comprises a control lever and a tilting plate on which the motor is mounted, articulated to each other by means of a transmission arm, the effort required to disengage the motor assembly from the clutch assembly is further reduced.

A further advantage of the invention derives from the separate arrangement of the motor and coupling units on one side and reduction gear on the other. This arrangement in particular allows to obtain a further reduction torque between the motor unit and the reduction unit, with the advantage of being able to reduce the size of the gears in the reduction unit, with the same reduction ratio desired.

Furthermore, thanks to the fact that the motor unit and the coupling unit are arranged outside the device casing, the considerable advantage is obtained of allowing rapid replacement of the gear motor pinion and the gear wheel of the reduction unit, with consequent possibility to easily and economically vary the reduction ratio according to the use for which the device is intended and the motor used.

Brief Description of the Figures

Figure 1 is an overall schematic view of the control device according to the invention, associated with an emergency handle;

Figure 2 is a top view in transparency of the device of Figure 1 in engagement configuration;

- Figure 3 is a top view in transparency of the device of Figure 1 in the disengagement configuration;

Figure 4 is a top view of the device of Figure 1 in engagement configuration;

Figure 5 is a top view of the device of Figure 1 in the disengagement configuration;

Figure 6 is a sectional side view of the device of Figure 1 in engagement configuration.

Description of a Preferred Form of Realization

With reference to the attached figures, the control device according to the invention, which has been indicated as a whole with the reference number 11, comprises a casing 13, a motor unit 15, a coupling unit 17, a reducer unit 19 and a drive unit command 21.

The casing 13 is substantially constituted in the form of a parallelepiped box in which sides 13a, a base 13b and a removable lid 13c are defined in order to access the members housed inside the box. The casing 13 is preferably made of metal, for example steel or aluminum.

The motor unit 15 comprises an electric gearmotor 23 equipped with a control pinion 25.

According to the invention, the motor unit 15 is associated with a clutch unit 17 thanks to which the pinion 25 can be brought into the engaged position or disengaged with respect to a corresponding toothed wheel 27 provided at the input of the reduction unit 19.

The reduction unit 19 comprises a cascade of gears 29a, 29b, 29c, 29d provided to obtain the desired reduction ratio between said gear motor 23 and the control unit 21. The reduction unit 19 is housed inside the casing 13, on the opposite side of the base 13b with respect to the coupling assembly 17 which is instead preferably housed outside said casing 13, protected by a suitable casing.

The control unit 21 comprises a control shaft 31 to which a splined rod 33 of a ball screw or the like is associated, which controls, according to the known technique, the opening and closing of a vehicle door ( not illustrated).

Still according to the invention, the clutch assembly 17 comprises a control lever 35, a transmission arm 37, a tilting plate 39, on which the gearmotor 23 is fixed and an elastic element 41, for example a helical spring with a the end associated with the base 13b of the casing 13. Said control lever 35, said transmission arm 37 and said tilting plate 39 are arranged in such a way that when the control pinion 25 is engaged on the toothed wheel 27 (Figure 2 and 6), the rocker plate 39 can be rotated around the hinge pin 43 to bring the pinion 25 into the disengagement configuration (Figure 3), with a minimum effort. This arrangement is obtained thanks to the fact that the return arm 37, which has an approximately rectilinear shape, is substantially aligned with respect to the â € œSâ € axis which passes through the hinging pin 45 of the control lever 35 at the base. 13b of the casing 13 and for the hinge pin 47 of the transmission arm 37 to the tilting plate 39. More precisely, said arrangement is such that in the aforesaid engagement configuration, the hinging pin 49 of the transmission arm 37 to the control lever 35 is slightly offset towards the tilting plate 39 with respect to the â € œSâ € axis.

Said control lever 35 is equipped with a pair of holes 51 for fixing the end of corresponding control cables 53 associated with respective emergency handles 55 (one of which is illustrated in Figure 1), generally arranged one at the inside and one outside the vehicle.

Advantageously, thanks to the fact that the motor unit 15 is associated with a movable coupling unit 17, configured according to the described arrangement, it is possible to disengage the pinion 25 of the gearmotor 23 from the reduction unit 19 by acting on the emergency handles 55 and, consequently , allow the door to be opened manually, with minimal effort.

As is known, when the door is closed, the tightening torque exerted by the gearmotor at the pinion 25 and the toothed wheel 27 is particularly high and in any case such that the mutual disengagement between said pinion 25 and the toothed wheel 27, it would require considerable effort. Nevertheless, thanks to the arrangement described, the pinion 25 can be easily moved away from the toothed wheel 27 by exerting a sufficient force to bring the hinge pin 49 of the transmission arm 37 on the opposite side of the â € œSâ € axis with respect to the position assumed when pinion 25 meshes with toothed wheel 27.

It is clear that what has been described is given only by way of non-limiting example and that variations and modifications to the described embodiment, in particular as regards shape, dimensions, materials, types of components, etc., are possible without going out of the protective field. of the invention. Thus, further applications beyond those mentioned above are also possible.

Claims (1)

CLAIMS 1.Electromechanical control device (11) for roto-translating doors comprising a casing (13), a motor unit (15), a coupling unit (17), a reduction unit (19) and a control unit (21) , characterized in that said coupling unit comprises a tilting plate (39) and a control lever (35) hinged to a base of said casing and articulated to each other by means of a transmission arm (37), said motor unit being associated with said pivoting plate and said control lever being associated with an emergency handle, the actuation of the emergency handle being capable of causing the rotation of said control lever and said pivoting plate through said transmission arm. Control device according to claim 1, wherein said motor unit (15) incorporates a control pinion (25) capable of passing from an engagement position to a disengagement position and vice versa with respect to a corresponding toothed wheel (27) provided at the inlet to the reduction unit (19), due to the movement of said clutch unit. Control device according to claim 2, wherein said clutch assembly (17) further comprises an elastic element (41), said elastic element having an end associated with the base (13b) of the casing (13) and in which said control lever (35), said return arm (37) and said pivoting plate (39) are arranged in such a way that when the control pinion (25) is engaged on the toothed wheel (27), the pivoting plate ( 39) can be rotated with a minimum effort to bring the pinion (25) into the disengagement configuration. Control device according to claim 3, wherein said control lever and said pivoting plate are hinged to the base of said casing (13) in corresponding hinging pins (45,43), said transmission arm being in turn hinged to said lever and to said pivoting plate in corresponding hinging pins (49,47). 5. Control device according to claim 4, wherein said transmission arm (37) has an approximately rectilinear shape and in which when said pinion (25) is in the engagement configuration, said transmission arm is substantially aligned with respect to to the â € œSâ € axis which passes through the hinge pin (45) of the control lever (35) at the base (13b) of the casing (13) and through the hinge pin (47) of the transmission arm (37 ) to the rocker plate (39). 6. Control device according to claim 5, wherein in said engagement configuration, the hinge pin (49) of the transmission arm (37) to the control lever (35) is slightly offset towards the rocker plate (39) with respect to said â € œSâ € axis. 7. Control device according to claim 6, wherein said control lever (35) is equipped with a pair of holes (51) for fixing the end of corresponding control cables (53) which can be associated with respective emergency handles (55). 8. Control device according to claim 1, in which said casing (13) is substantially constituted in the form of a parallelepiped box in which sides (13a), a base (13b) and a cover (13c) are defined, which can be removed for access to the organs housed inside the box. Control device according to any one of the preceding claims, wherein said reduction unit (19) comprises a cascade of gears (29a, 29b, 29c, 29d) provided to obtain the desired reduction ratio between the motor unit (15) and the control unit (21). 10. Control device according to claims 8 and 9, in which said reduction unit (19) is housed inside the casing (13), on the opposite side of the base (13b) with respect to the coupling unit (17) which is instead housed on the outside of said envelope (13).