ES2690654T3 - Electromechanical control device for revolving doors - Google Patents

Abstract

Electromechanical control device (11) for revolving doors, comprising - a base plate (13b), a reduction unit (19) and a motor unit (15), - said motor unit (15) comprises an electric reduction motor ( 23) having a drive pinion (25), said motor unit (15) being associated with a clutch unit (17) by means of which the drive pinion (25) can be coupled or uncoupled from a sprocket corresponding input (27) of said reduction unit (19) arranged to provide the desired reduction ratio between said reduction motor (23) and a control unit (21), - wherein said motor unit (15) and said unit of clutch (17) are associated with the base plate (13b) on the opposite side with respect to the reduction unit (19) and the control unit (21), - wherein said clutch unit (17) comprises - a plate rocker (39) with which said motor unit (15) is associated, - a control lever in for ma of L (35) having a respective leg (35a) and a foot (35b) mutually inclined in order to define an acute angle directed towards the tilting plate (39) and having an area (51) to fix the end of at least one control cable (53) associated with an emergency handle (55), the operation of the emergency handle (55) being capable of causing the rotation of said control lever (35) and said tilting plate (39) by means of an approximately rectilinear return arm (37), and - an elastic element (41) consisting of a helical spring or similar device, having a first end fixed to the base plate (13b) at a first fixing point (42) and the opposite end fixed to the control lever (35) at a second fixing point (44), said elastic element (41) being intended to keep the control lever (35) in the position corresponding to the position of coupling of the motor unit (15), so that it is necessary to know rar the resistance of said elastic element to cause the motor unit to move from the coupled position to the uncoupled position, - said tilting plate (39) and control lever (35) being connected with the ability to pivot to the base plate (13b ) with the first respective articulation pins (43, 45) and mutually articulated by means of said return arm (37) approximately rectilinear in turn connected with the ability to pivot to said tilting plate (39) and said control lever (35 ) with the respective second articulation pins (47, 49), characterized in that - the fixing points (42, 44) in which the elastic element (41) is fixed to the control lever and the base plate (13b) they are aligned along a first axis (T1) that is, in essence, parallel to a second axis (T2) that passes through the first articulation pins (43, 45) that connect the swing plate with the ability to pivot (39) and the control lever role (35) to said base plate (13b) when the motor unit is in its coupled position, and - wherein said first and second axes (T1, T2) define an angle less than 30 ° when said motor unit is in its uncoupled position, and wherein said second articulation pins (47, 49) of the return arm (37) are, in essence, aligned along a third axis ("S") that passes through the articulation pin (45 ) which connects the control lever (35) to the base plate (13b) with the ability to pivot, so that in said coupled state, the articulation pin (49) that connects with the ability to pivot the return arm (37) to the control lever (35) is slightly offset towards the tilting plate (39) with respect to said third axis ("S"), whereby said control lever (35), said return arm (37) and said tilting plate (39) are arranged so that, when the drive pinion (25) engages with the gearwheel (27), the pl swinging arm (39) can rotate around the articulation pin (43) with respect to the base plate (13b) to put the drive pinion (25) in the disconnected state with minimal effort, and by which said second fixing point ( 44) in which the elastic element (41) is fixed to the base plate (13b) coincides with the second articulation pin (49) where the rectilinear return arm (37) is connected with the ability to pivot to said tilting plate (39) or is located at most a very small distance from said second articulation pin (49), said distance being between 5 and 10 mm, sufficient to avoid interference between the return arm (37) and the element elastic (41) during operation of the control lever (35) and the consequent rotation of the tilting plate (39).

Description

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DESCRIPTION

Electromechanical control device for revolving doors Technical field

The invention relates to an electromechanical control device for revolving doors.

More precisely, the invention relates to an electromechanical control device for revolving doors of vehicles, such as buses, people transporters and the like.

Prior art

Electromechanical control devices for revolving doors of passenger vehicles, such as buses and people transporters, are known in the art.

Such 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 bar and a pair of arms associated with the bar.

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

For security reasons, it is required that the doors of the previous type can also be opened in case of failure of the control device. For that reason, the control devices currently used are equipped with a release system that decouples the electric motor from the reduction unit.

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

Generally, said release systems can be operated by means of a pair of safety handles, one of which is located inside the vehicle and the other outside the vehicle. Document US-A-4257285 describes an electromechanical control device provided with a manual decoupling between its motor unit and its reduction unit and comprising the features of the preamble of claim 1. One of the drawbacks of prior art devices It relates to the need to exert considerable effort in case of emergency, when the device has to be decoupled to allow manual door opening.

This inconvenience is particularly serious if it is considered that it is necessary that the door can be opened easily in case of emergency, even by a child or an elderly person.

Another drawback of the prior art is related to the complexity of the solutions adopted so far, which consequently require frequent maintenance and involve high manufacturing costs.

An additional, but not the last, inconvenience of prior art devices relates to the need to obtain a reduction ratio sufficient to allow the use of reduced power motors or, in any case, avoid motor overloads and lengthen Its useful life. Obtaining an adequate reduction ratio implies, however, providing a gear chain that is more cumbersome the greater the reduction ratio, and this leads to the impossibility of obtaining suitable reducing ratios when it is desired to keep the device compact, or the need to increase the size of the device housing.

The invention aims to solve the aforementioned drawbacks by providing an electromechanical control device for revolving doors, which can be easily decoupled and with minimal effort and which can be manufactured industrially at advantageous costs.

In view of the above, there is a continuous and permanent need for an improved user interface.

Description of the invention

Advantageously, thanks to the fact that the mobile clutch unit comprises a control lever and a tilting plate on which the engine is mounted, whose lever and plate are mutually articulated by means of a return arm, and that a elastic element arranged to keep the control lever in the arrangement corresponding to the coupling state of the motor unit is disposed between the control lever and the base of the device, such that it is necessary to overcome the resistance of said elastic element to obtain the passage to the decoupled state, the effort required to manually decouple the engine unit from the clutch unit is reduced with respect to prior art devices.

A further advantage of the invention relates to the separate arrangement of the engine and clutch units, on the one hand, and the reducing unit, on the other hand, with respect to the base plate of the device. More particularly, such an arrangement makes it possible to obtain an additional reduction torque between the motor unit and the reduction unit, with the advantage that the size of the gears in the reduction unit can be reduced for a given desired reduction ratio.

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In addition, thanks to the arrangement of the motor unit and the clutch unit outside the housing of the device, the considerable advantage is obtained that a rapid replacement of the gear motor pinion and the gear wheel of the reduction unit is possible, with the consequent possibility of easily and economically varying the reduction ratio depending on the intended use of the device and the motor used.

Brief description of the drawings

Fig. 1 is a schematic general view of the control device according to the invention, associated with an emergency handle.

Fig. 2 is a plan view, in transparency, of the device shown in Fig. 1, in coupled state.

Fig. 3 is a plan view, in transparency, of the device shown in Fig. 1, in the uncoupled state;

Fig. 4 is a plan view of the device shown in Fig. 1, in coupled state.

Fig. 5 is a plan view of the device shown in Fig. 1, in the uncoupled state;

Fig. 6 is a sectional profile view of the device shown in Fig. 1, in coupled state.

Description of a preferred embodiment

With reference to the accompanying drawings, the control device according to the invention, which is generally indicated by reference number 11, includes a base plate 13b, an engine unit 15, a clutch unit 17, a reducing unit 19 and a control unit 21.

The device also includes a housing 13, manufactured, in essence, as a parallelepiped box in which the flanks 13a, the base plate 13b and a removable cover 13c are defined to access the elements housed within the box. The housing 13 is preferably made of metal, for example, steel or aluminum.

The motor unit 15 comprises an electric motor reducer 23 having a drive pinion 25.

According to the invention, the motor unit 15 is associated with a clutch unit 17 by means of which the pinion 25 can be coupled or uncoupled from a corresponding input sprocket 27 of the reduction unit 19.

Always according to the invention, said motor unit 15 and said clutch unit 17 are associated with the base plate 13b on the opposite side with respect to the reduction unit and the control unit and with respect to the housing in which preferably the last two units are housed and, therefore, the engine and clutch units can be easily accessed and inspected.

The reduction unit 19 comprises cascade gears 29a, 29b, 29c, 29d arranged to provide the desired reduction ratio between said reduction motor 23 and the control unit 21. The reduction unit 19 is housed inside the housing 13, on the side opposite of the base 13b with respect to the clutch unit 17 which, on the contrary, is preferably housed outside said housing 13 and protected by a suitable cover.

The control unit 21 includes a control shaft 31, integrated with the gear 29d and having associated therewith a grooved stud 33 of a ball screw or the like, which conventionally controls the opening and closing of a vehicle door (not shown).

Always according to the invention, the clutch unit 17 comprises a control lever 35, a return arm 37, a tilting plate 39 in which the reduction motor 23 is secured and an elastic element 41.

Said control lever 35, said return arm 37 and said tilting plate 39 are arranged such that when the drive pinion 25 engages with the sprocket 27 (Fig. 2 and 6), the tilting plate 39 can be rotated. around the articulation pin 43 with respect to the base 13b to place the pinion 25 in disengaged state (Fig. 3) with minimal effort. An arrangement of this type is achieved since the articulation pins 47, 49 of the return arm 37, which is approximately rectilinear, are essentially aligned along the "S" axis that passes through the articulation pin 45, connecting the control lever 35 to the base plate 13b capable of pivoting. More precisely, said arrangement is such that, in said coupled state, the articulation pin 49 which connects with the ability to pivot the return arm 37 to the control lever 35 moves slightly towards the tilting plate 39 with respect to the axis "S ".

Said control lever 35 has a fixing zone 51, defined for example by a pair of corresponding holes for fixing the ends of the respective control cables 53 associated with the respective emergency handles 55 (one of which is shown in Fig. 1), one of said handles being generally located inside the vehicle and the other outside the vehicle.

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According to the invention, the control lever 35 is L-shaped and the leg 35a and the foot 35b of the "L" are mutually inclined in order to form an acute angle directed towards the tilting plate 39. In addition, the end upper leg 35a is connected with the ability to pivot at 45 to the base 13b and the end of the foot 35b is connected with the ability to pivot at 49 to the return arm 37. Furthermore, said fixing zone 51 is formed in correspondence with the part that connects the leg 35a and the foot 35b of the "L", so that the fixing zone 51 separates, essentially, laterally with respect to the other parts of the device, and in particular with respect to the return arm 37 , thereby reducing the risks of interference between moving parts.

According to the invention, the elastic element 41 is intended to keep the control lever 35 in the position corresponding to the state of engagement of the pinion 25 and is preferably disposed between the control lever 35 and the base plate 13b. More precisely, said elastic element 41 comprises a helical spring or similar device, having a first end fixed to the base 13b in 42 and the opposite end fixed to the control lever 35 in 44. Said fixing point 44 intended to fix a end of the elastic element 41 to the control lever 35 is located near or in the articulation pin 49 which connects with the ability to pivot the return arm 37 to the control lever 35, whereby said fixing point 44 coincides with the articulation pin 49 or is located at a very small distance from said pin, preferably from 5 to 10 mm, sufficient to avoid interference between the return arm 37 and the elastic element 41 during operation of the control lever 35 and the consequent rotation of the tilting plate 39. Furthermore, always according to the invention, said fixing points 42 and 44 of the elastic element 41 are aligned along a axis "T1" which is, in essence, parallel with the axis "T2" that passes through the articulation pins 43 and 45 of the tilting plate 39 and the control lever 35, respectively, when the pinion 25 is in the state coupled, said axes defining an angle of a few degrees, preferably an angle of less than 30 °, when said pinion is in the uncoupled state.

Advantageously, thanks to the association of the motor unit 15 with a mobile clutch unit 17 having the described arrangement, it is possible to decouple the pinion 25 of the reduction motor 23 from the reduction unit 19 acting on the emergency handles 55 and , consequently, allow manual opening of the door, with minimal effort.

As is known, when the door is closed, the locking torque exerted by the gearmotor in correspondence with the pinion 25 and the gearwheel 27 is particularly high and, in any case, is such that the mutual decoupling of said pinion 25 and wheel Toothed 27 would require considerable effort. In spite of this, thanks to the arrangement described, the pinion 25 can easily move away from the gearwheel 27 by exerting sufficient force to overcome the resistance of the spring 41 and to bring the articulation pin 49 of the return arm 37 to the opposite side of the "S" axis with respect to the position taken when the pinion 25 is engaging with the sprocket 27.

It is clear that the above description has been provided only by way of non-limiting example and that the changes and modifications in the described embodiment, in particular with respect to the shape, size, materials, types of components, etc. they are possible without departing from the scope of the invention as defined in the appended claims.

Claims (7)

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Electromechanical control device (11) for revolving doors, comprising - a base plate (13b), a reduction unit (19) and a motor unit (15), - said motor unit (15) comprises an electric reducing motor (23) having a drive pinion (25), said motor unit (15) being associated with a clutch unit (17) by means of which the pinion of drive (25) can be coupled or uncoupled from a corresponding input sprocket (27) of said reduction unit (19) arranged to provide the desired reduction ratio between said reduction motor (23) and a control unit (21) , - wherein said motor unit (15) and said clutch unit (17) are associated with the base plate (13b) on the opposite side with respect to the reduction unit (19) and the control unit (21), - wherein said clutch unit (17) comprises - a tilting plate (39) with which said motor unit (15) is associated, - an L-shaped control lever (35) having a respective leg (35a) and a respective foot (35b) mutually inclined in order to define an acute angle directed towards the tilting plate (39) and having a zone ( 51) to fix the end of at least one control cable (53) associated with an emergency handle (55), the operation of the emergency handle (55) being able to cause the rotation of said control lever (35) and said tilting plate (39) by means of an approximately rectilinear return arm (37), and - an elastic element (41) consisting of a coil spring or similar device, which has a first end fixed to the base plate (13b) at a first fixing point (42) and the opposite end fixed to the control lever ( 35) at a second fixing point (44), said elastic element (41) being intended to keep the control lever (35) in the position corresponding to the coupling position of the motor unit (15), in such a way that it is necessary to overcome the resistance of said elastic element to cause the motor unit to move from the coupled position to the uncoupled position, - said tilting plate (39) and control lever (35) being connected capable of pivoting to the base plate (13b) with the first respective articulation pins (43, 45) and mutually articulated by means of said return arm ( 37) approximately rectilinear in turn connected with the ability to pivot to said tilting plate (39) and said control lever (35) with the respective second articulation pins (47, 49), characterized in that - the fixing points (42, 44) in which the elastic element (41) is fixed to the control lever and the base plate (13b) are aligned along a first axis (T1) which is, in essence , parallel to a second axis (T2) that passes through the first articulation pins (43, 45) that connect the rocker plate (39) and the control lever (35) with the ability to pivot to said base plate (13b ) when the motor unit is in its coupled position, and - wherein said first and second axes (T1, T2) define an angle of less than 30 ° when said motor unit is in its disengaged position, and wherein said second articulation pins (47, 49) of the return arm (37 ) are, in essence, aligned along a third axis ("S") that passes through the articulation pin (45) that connects the control lever (35) with pivot ability to the base plate (13b), whereby, in said coupled state, the articulation pin (49) that connects the return arm (37) with pivot capacity to the control lever (35) is slightly displaced towards the tilting plate (39) with respect to said third axis ("S"), whereby said control lever (35), said return arm (37) and said tilting plate (39) are arranged so that, when the drive pinion (25) engages with the gearwheel (27), the tilting plate (39) can rotate around the articulation pin (43) with respect to the base plate (13b) to put the drive pinion (25) in the disconnected state with minimal effort, and by which said second fixing point (44) in which the elastic element (41) is fixed to the base plate (13b ) coincides with the second articulation pin (49) where the rectilinear return arm (37) is connected with the ability to pivot to said tilting plate (39) or is located at most a very small distance from said second pin of joint (49), said distance being between 5 and 10 mm, sufficient to avoid interference between the return arm (37) and the elastic element (41) during operation of the control lever (35) and the consequent rotation of the tilting plate (39). 2. Device according to claim 1, wherein said zone for fixing the control cable is provided with a pair of holes (51) for fixing the ends of the respective control cables (53) that can be associated with the respective emergency handles (55). 3. Device according to claim 1, wherein the control lever (35) is connected with the ability to pivot to the base (13b) at the upper end of the leg (35a) and wherein the return arm (37 ) connects with the ability to pivot to the control lever (35) at the free end of the foot (35b). 4. Device according to claim 3, wherein said zone (51) for fixing the control cable is provided in correspondence with the part that connects the leg (35a) and the foot (35b) of the L-shaped lever , so that said fixing zone (51) separates, in essence, laterally with respect to the other parts of the device, and in particular with respect to the return arm (37), thereby reducing the risks of 5 interference between moving parts. Device according to claim 1, which includes a housing (13) manufactured, in essence, as a parallelepiped box having flanks (13a), a base (13b) and a removable cover (13c) to access the elements housed inside the box. 6. Device according to any of the preceding claims, wherein said reduction unit (19) 10 comprises cascade gears (29a, 29b, 29c, 29d) arranged to provide the reduction ratio desired between the motor unit (15) and the control unit (21). 7. Device according to claims 5 and 6, wherein said reducing unit (19) is housed inside the housing (13) on the opposite side of the base (13b) with respect to the clutch unit (17), which in turn is housed outside said housing (13). fifteen