JP2001509559A - Security latch and latch release actuator and lock adapted to the actuator - Google Patents

Abstract

This actuator comprises an electric motor with an output gear engaged with a gear (5) which is rigidly connected to an axial screw (6) driving a device (11) for operating a security latching mechanism. With the motor (1), these elements are arranged inside the housing (17) through which the operating device passes in a leak tight manner, the screw (6) preventing rotation but allowing translation of the nut. Means (8), the actuator being coaxial with the nut and the screw and being driven in rotation by the nut anti-rotation means, wherein the translation is prevented whenever the area is translated. It comprises an operating area (11), which is fitted with a seal (15) in the area where it passes through the housing. This construction offers the advantage of being small and therefore occupying a small space, while the O-ring (15) between the rotary output area (11) and the actuator housing (17) has a better leak-proof property Guarantee.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The invention relates to a class comprising an electric motor with an output gear engaged with a gear rigidly connected to an axial screw driving a device for operating a security latching mechanism. Security latch and latch release actuator for locking vehicle doors.

2. Description of the Related Art These elements are leaktightly arranged in a housing through which the operating device passes.

[0003] A first type of actuator is known in which a gear and a screw attached to the gear drive a translational translation of a nut-type slider that operates a security latching mechanism through a wall of a housing. Since this type of actuator consists of several parts, it has the advantage of being small for a given power and having a simple structure. Conversely, the seal provided by the seal in the area traversed by the nut type slider is not satisfactory due to the translation of the output part.

In a second type of conventional actuator, a screw rigidly connected to the gear engages the forked end of the articulated connecting arm at the opposite end of the output arm to engage the dog. Carry a nut with dots. The leaktightness of the outlet relies on two connecting arms articulated by O-rings.

[0005] Although this actuator offers good leaktightness for simplicity, unfortunately this actuator has the disadvantage of taking up a large space in the X and Y directions. There is.

[0006] It is therefore an object of the present invention to form an actuator which at the same time provides satisfactory leakage protection and is designed to occupy only a small space.

According to the present invention, a security latch for latching a door of a motor vehicle and a latch and release actuator according to the present invention are arranged such that a screw locks rotation of a nut but translates the nut. In cooperation with the nut with the enabling means, the actuator is a security latching mechanism operating area coaxial with the nut and the screw, wherein the nut is prevented from being translated by the nut rotation locking means whenever it is translated. And forming an area adapted to be driven in a rotational direction, the area comprising:
The operating device is characterized in that it is fitted with a seal in the area passing through the housing.

According to additional features, this region is in the form of a recessed tube terminating in the bore, acting as a trunnion bearing for the screw cooperating with a second bearing integral with the housing.

[0009] Such a device occupies only a small amount of space, and the output element is recessed, independently rotatable and non-translatable, the output element being an O-ring providing excellent sealing performance. And can be adapted.

According to one form of embodiment of the invention, the screw bearing on the opposite side of the gear is arranged in this area, and the nut is associated with each spiral-shaped ramp incorporated in this area. It has mated laterally projecting fingers, and translation of the nut rotates this area about an axis.

Further features and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, which illustrate, by way of non-limiting example, two embodiments of the invention. The device shown in the drawings is a security latching and unlatching actuator for a vehicle door lock (not shown).

The actuator has an electric motor 1 with an output shaft 3 carrying a gear 2 and possibly a centrifugal clutch 4. The output gear 2 is engaged with a gear 5 which is rigidly connected to an axial screw 6 with a nut 7 fitted with two laterally projecting fingers 8.

As shown in FIGS. 1, 2 and FIGS. 4 and 5, respectively, which show two possible forms of embodiment, the screw 6 and the nut 7 are arranged on one side or the other side of the gear 5. Can be done. The screw 6 is carried on two bearings 26, 27, one of which is arranged in the housing 17 and the other of which is continuous with the bore 28 in the area 11 on the output side of the actuator. I have.

The aforementioned diametrically opposed lateral fingers 8 are engaged in two respective spirally shaped ramps 9 incorporated in a cylindrical area 11, The area is arranged coaxially with the screw 6 and the gear 5. Region 11 activates an operating pin 14 which constitutes the output device of the actuator and forms part of a security latching mechanism of a lock (not shown).

Further, the fingers 8 have respective ends engaged in corresponding slots 12,
It is arranged parallel to the screw 6 in a bracket 13 which is rigidly connected to a housing 17 supporting the motor 1. The output area 11 is the peripheral collar 1
It comprises an O-ring seal 15 supported by the seal 6, which ensures the leaktightness of the wall of the housing 17 with the previously described assembly of parts.

The elements of the actuator are displaced from the latch by an emergency operating key (not shown) by a dog shaft 18 or a lock cylinder that is connected by mechanical means to a security latching and latching release link 19. be able to. The link 19 can be operatively connected to the area 11 and the operation of this emergency manual key is used to rotate the area 11 and activate the operating pin 14 when the electric motor 1 fails. be able to. Depending on the running load in the mechanism and the ease with which the key torque is desired to operate, the centrifugal clutch 4 can be eliminated.

FIG. 5 shows a possible example of an embodiment of a mechanical connection between the link 19 and the operating area 11. The operating area 11 is provided with a rib 22 which engages in a notch 23 arranged in a link 19, the link 19 receiving a driver 25 which is rotationally rigidly connected to the lock cylinder 18, a terminal flat. A recess 24 is likewise provided. It is therefore understood that when the lock cylinder 18 is rotated, this causes the driver 25 to rotate, which translates the link 19, which, by means of the protruding ribs 22, rotates the operating area 11.

If appropriate, the described actuator can be arranged in the same lock housing 17 as a master security locking device of the type not known and thus not shown.

The operation method of the above actuator is as follows.

When the electric motor 1 is rotated in one or the other direction, the rotation of the output gear 2 drives the gear 5 and the axial screw 6. The axial load due to the engagement of the gear 2 with the gear 5 is, on the one hand, absorbed by a bearing 26 arranged in the housing 17 close to the gear 5 and a series of bores 28 recessed into the area on the output side of the actuator. It is absorbed on the other hand by the bearing 27 forming the part. The nut 7 is prevented from rotating by the finger 8 sliding in the slot 12. As a result, the nut 7 is
Can only be translated along the lateral fingers 8 during this translation.
Slides in a spiral-shaped ramp 9.

Therefore, this sliding of the dog point 8 parallel to the axis of the screw 6 causes the operating area 11 to rotate coaxially with the screw 6 and the gear 5, which is one-way with respect to the rotation direction of the output area 11. Activate the security latching operating pin 14 in a direction or another direction (as indicated by the arrow in FIG. 4).

During these rotational movements by the output area 11, the leakproofness between the output area 11 and the actuator and lock housing 17 is such that the area 11 is not translated but only rotated. , O-rings 15 continue to be satisfactorily and completely guaranteed.

Furthermore, the described actuator mechanism can be made very compact, this actuator has the advantage of a compact structure occupying a small space that can or cannot receive the centrifugal clutch 4 and the rotation The result is that the area 11 and the arrangement of the screw 6 in the housing 17 and the rotating area 11 and the O-ring 15 simultaneously provide the advantage of a better leaktightness.

The housing 17 may include the specific actuators described, or actuators with locking and unlocking mechanisms for the lock.

[Brief description of the drawings]

FIG. 1 is a partial elevation sectional view showing a first embodiment of an actuator according to the present invention.

FIG. 2 is an elevational view with a partial cross section in a plane perpendicular to the plane of FIG. 1;

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an enlarged partial perspective view of a second embodiment of the embodiment of the security latch and latch release actuator seen in FIGS.

5 is a perspective view of the actuator seen in FIG. 4, seen from another angle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electric motor 2 ... Output gear 3 ... Output shaft 4 ... Centrifugal clutch 5 ... Gear 6 ... Axial screw 7 ... Nut 8 ... Finger part 9 ... Swirl-shaped ramp 11 ... Output area 12 ... Slot 13 ... Bracket 14 ... Operation Pin 15 O-ring seal 16 Peripheral collar 17 Housing 18 Dog shaft or lock cylinder 19 Security latch and latch release link 22 Projecting rib 23 Notch 24 Terminal flat recess 25 Driver 26 Bearing 27 ... Bearing 28 ... Bore

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Claims (8)

[Claims] An electric motor (1) having an output gear (2) engaged with a gear (5) rigidly connected to an axial screw (6) for driving an operating device (11) for a security latching mechanism. ), Wherein these elements are arranged in a housing (17) through which the operating device passes in a leaktight manner. ) Cooperates with a nut (7) with means (8) for locking the rotation of the nut but allowing the nut to translate, said actuator comprising:
Security nut latching mechanism operation area coaxial with the nut and the screw (11)
Wherein said nut forms an area (11) which is adapted to be prevented from being translated and driven in the rotational direction by said nut rotation locking means whenever it translates, said area comprising: A security latch and latch release actuator for locking a door of a motor vehicle, characterized in that the operating device is fitted with a seal (15) in the area passing through the housing. 2. The bore (11) cooperating with a second bearing (26) integral with the housing (17) to function as a trunnion bearing for the screw (6).
27. Actuator according to claim 1, characterized in that it is in the form of a hollow tube ending in 27). 3. The nut (7) has a spiral shape incorporated in the region such that the region is rotated about the axis by translation of the nut (7). 2. Actuator according to claim 1, characterized in that it comprises a laterally projecting finger (8) engaging in a ramp (9). 4. A slot (1), wherein said finger (8) is parallel to said screw (6).
Actuator according to claim 3, characterized in that it guides 2) linearly, said slot being formed in a fixed part (13) integral with said housing (17). 5. Actuator according to claim 4, wherein the rotation area (11) is rigidly connected to a security latch operating pin (14). 6. The operating area (11) is connected to a latching and unlatching link (19) cooperating with a dog shaft (18) actuated by a manual key. Or the actuator according to 4. 7. The output shaft (3) of the motor (1) is a centrifugal clutch (4).
The actuator according to claim 1, wherein the actuator carries: 8. A lock for a motor vehicle door housed in a housing (17), comprising a locking device and a security latch and latch release mechanism. A lock for a motor vehicle door, characterized in that it comprises a security latching and unlatching actuator (1, 6, 7, 11, 14) according to any of the preceding claims, arranged on a vehicle.