Device for Opening and Locking Doors with Automatic Clutch System

Abstract

A door opening and closing device with automatic clutch system, which makes it possible to transmit (engage) or interrupt (disengage) the torque generated by a motor to a shaft coupled to a lock cylinder, and including a knob (1), joined to a rotation shaft (2), joined with a spring rotation washer (3) on the shaft, and where a spring is then located (4) for joining two toothed rotary bushes (5,7) and a guide bearing (6); and where the rotating bushes (5,7) are always meshed by the action of a compression spring (4), and in their resting position, are in contact with the upper wall of the motor housing (12) connected with a gearwheel with torque transmission lugs (8).

Claims

1. A device for opening and closing doors with an automatic clutch system comprising: a knob; a motor for a lock cylinder; a motor housing for the motor; a rotation shaft attached to the knob and which connects the knob to the motor for the lock cylinder; a washer connected to the rotation shaft; two rotating toothed bushes arranged around the rotation shaft; a guide bearing for guiding at least one of the two rotating toothed bushes; a compression spring arranged around the rotation shaft; wherein said shaft is connected to the washer for rotating the compression spring arranged around the shaft, and wherein the spring applies pressure to join the two rotating toothed bushes such that the rotating toothed bushes are always engaged by the action of the compression spring, and in a rest position of the toothed bushes, at least one toothed bush is in contact with an upper wall of the motor housing and connected to a gear wheel with torque transmission lugs.

2. A device in accordance with claim 1, further comprising a coupling for connecting the shaft integrally with a shaft of the lock cylinder, and wherein the shaft has a hexagonal shape at a rear end thereof which fits into a cavity of a finned crown wheel which is attached to the shaft.

3. A device in accordance with claim 1, further comprising a housing located after the coupling, responsible for housing the entire system.

4. A device in accordance with claim 1, wherein the toothed bushes each have an inclination angle of 38, allowing one toothed bush to easily slide over the other toothed bush.

5. A device in accordance with claim 3, wherein the housing is made of a plastic material.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0016] A brief description is given below of a series of drawings that help to better understand the invention and that are expressly related to an embodiment of said invention that is presented as a non-limiting example thereof.

[0017] FIG. 1. It shows a view of the door opening and closing device with automatic clutch system, that is the purpose of the present invention.

PREFERRED EMBODIMENT OF THE INVENTION

[0018] A preferred embodiment of the invention is shown in the attached FIGURE. More specifically, the door opening and closing device with automatic clutch system, purpose of the present specification, is composed of a knob (1), which makes it possible to operate or maneuver it manually from the inside of the door; and wherein said knob (1) is attached to a rotating shaft (2), which connects the knob (1) to the motor (12) of the lock cylinder.

[0019] And where said shaft (2) is joined with a rotating spring washer (3) on the shaft, and where a spring (4) for connecting two rotating toothed bushes (5,7) and a guide bearing (6) is then placed.

[0020] The rotating bushes (5, 7) are meshed at all times by the action of a compression spring (4), and can move along the shaft (2). And where said bushes (5,7) in their resting position, are in contact with the upper wall of the motor housing (12) connected to a sprocket with motor torque transmission shafts (8).

[0021] The teeth of the bushes (5,7) have a 38 angle of inclination, which allows one tooth to slide easily over the other.

[0022] The shaft (2) is integrally connected to the cylinder shaft via a coupling (10), and where, thanks to the hexagonal shape this has on its rear part, it fits into the cavity that the finned crown wheel (9) attached to the shaft (2) has.

[0023] Lastly, after the coupling (10) is the housing (11), which will be responsible for housing the entire system, and in a preferred embodiment will be made of a plastic material.

[0024] In a practical embodiment of the invention the user will be able to work with two basic maneuvers, one manual and one automatic.

[0025] In the case of a manual maneuver, the user can open the door manually both with a key (from the outside of the door) and with the knob, from inside.

[0026] In this manual maneuver, the user, on turning the knob or key, causes the shaft attached to these elements to rotate the cylinder shaft directly, which is the one that turns the mechanism of the lock.

[0027] This equipment's shaft (2), is attached to the cylinder shaft via the coupler (10), fixed by a captive device to the cylinder shaft, and, in turn, due to the hexagonal shape that this has on its rear part, fits into the cavity of the same shape that the finned crown wheel has (9), which is rigidly attached to the shaft (2) that joins this part with the assembly's knob (1). In this way the user can turn the lock cylinder, both using the knob, and using the key, by turning the cylinder directly.

[0028] In this manual maneuver the motor (12) is halted, blocking the gear wheel with torque transmission lugs (8).

[0029] Therefore, the geared bush coupling with the motor (7) will mesh with the gear wheel with lugs (8). Therefore, in its normal position (disengaged), it will be in its lowest position, with the lower part of this bush (7) touching the motor housing (12), and maintaining this position as a result of the thrust of the connecting spring of the toothed bushes (5,7).

[0030] Such that, when manually rotated, the toothed bush with a vertical movement (5), upon finding the motor coupling bush (7) blocked, begins to slide its teeth over the teeth of the motor coupling gear bushing (7), which will cause the spring (4) connecting both to be compressed, and will therefore allow the shaft (2) to rotate freely.

[0031] To do so, the spring (4) connecting both bushes (5,7) rotates jointly with the shaft, to avoid torsion on its thread. To achieve this, the spring (4), on its upper side rests on the rotation washer (3), which always rotates integrally with the shaft (2), since this washer (3) has two straight recesses in its bore, the same size and shape as the shaft (2).

[0032] On the bottom side, the spring (4) rests against the toothed bush with free vertical movement (5), which also rotates in solidarity with the shaft (2), on also having a hole through it in the shape of the shaft (2), with both turning in solidarity at all times.

[0033] This set of parts has a vertical movement on the shaft (2), which allows one toothed bush to rotate and slide over the other.

[0034] In the automatic maneuver, when the motor (12) starts to rotate, the sprocket with motor torque transmission lugs (8) begins to rotate, when these lugs strike the toothed bush coupling with the motor (7), this offers a resistance to the motor, on being meshed with the vertical movement bush (5), with the result that the gear wheel lug (8) begins to slide on the curved side defined in the gear coupling bush (7), forcing it to rise on its rotation shaft. This lifting movement occurs throughout the curve defined in this bush (7), up to a total of 4 mm of elevation, from its equilibrium position. At the maximum point of elevation, this bush (7) is completely joined to the free vertical movement toothed bush (5), with the latter entering into contact with the inner side of the equipment housing (11), with the result that it is no longer possible to disengage both parts (5,7), while the motor (12) is rotating.

[0035] This total meshing allows the motor (12) to rotate the shaft (2), and transmitting by means of the finned crown wheel (9) and the coupling (10) that is integral to it, to rotate the shaft of the cylinder. In this way the motor (12) can open the lock, or by turning in the opposite direction, close the lock.

[0036] At the moment when the motor stops rotating, it stops pushing the lug of the toothed wheel (8) on the lifting curve of the toothed bush coupling with the motor (7), leaving the latter free. When free, the spring (4) pushes these bushes (5,7) back to their lowest point, thereby disengaging the motor (12) with respect to the rotation shaft (2) and leaving it free, at which time the user will have control over the manual maneuver.