Locking device for a plug-in connection

Abstract

The invention relates to a locking device for a plug-in connection between a plug and a socket. In accordance with the invention an actuator (4) and a blocking slide (6) are provided, wherein the actuator (4) is rotatable about an axis of rotation, the blocking slide (6) is displaceable in the longitudinal direction thereof between an unlocking position and a locking position, and the actuator (4) and the blocking slide (6) are formed in such a way and interact with each other such that a rotation of the actuator (4) is always combined with a longitudinal displacement of the blocking slide (6) and vice versa, wherein a longitudinal displacement of the blocking slide (6) by means of a rotation of the actuator (4) is always possible, whereas a rotation of the actuator (4) by means of a longitudinal displacement of the blocking slide (6) is possible only outside the locking position. A locking device of this type for a plug-in connection between a plug and a socket is thus provided, which enables simple and economical axial locking, which cannot be manipulated.

Claims

1. A locking device for a plug-in connection between a plug and a socket, comprising: an actuator configured to rotate about an axis of rotation, the actuator having a drive plate, wherein the drive plate has a first movement transfer device and a second movement transfer device; and a blocking slide configured to be displaced in a longitudinal direction between an unlocking position and a locking position, the blocking slide having a first movement transfer device and a second movement transfer device, wherein the actuator and the blocking slide are configured to interact with each other such that a rotation of the actuator and a longitudinal displacement of the blocking slide are coupled, wherein a longitudinal displacement of the blocking slide coupled with a rotation of the actuator is possible irrespective of a position of the blocking slide, whereas a rotation of the actuator coupled with a longitudinal displacement of the blocking slide is possible only when the blocking slide is displaced outside the locking position, wherein the first movement transfer device of the drive plate interacts with the first movement transfer device of the blocking slide and the second movement transfer device of the drive plate interacts with the second movement transfer device of the blocking slide, and wherein the second movement transfer device of the drive plate comprises a cam contour, wherein the second movement transfer device of the blocking slide comprises a stop, and wherein the cam contour bears against the stop and slides along the stop when the drive plate and blocking slide are moved relative to each other.

2. The locking device according to claim 1, wherein the first movement transfer device of the drive plate and the first movement transfer device of the blocking slide are configured such that in the locking position the drive plate is prevented from being rotated by a displacement of the blocking slide.

3. The locking device according to claim 1, wherein the first movement transfer device of the drive plate comprises a cam, and wherein the first movement transfer device of the blocking slide comprises a link configured to receive the cam.

4. The locking device according to claim 1, wherein the cam contour bears against the stop via a curved region outside the locking position and slides along the stop when the drive plate and the blocking slide are moved relative to each other, and bears against the stop via a flat region in the locking position.

5. The locking device according to claim 1, wherein the stop bears against the cam contour via a curved region.

6. A locking device for a plug-in connection between a plug and a socket, comprising: an actuator configured to rotate about an axis of rotation, the actuator having a drive plate, wherein the drive plate has a first movement transfer device and a second movement transfer device; and a blocking slide configured to be displaced in a longitudinal direction between an unlocking position and a locking position, the blocking slide having a first movement transfer device and a second movement transfer device, wherein the actuator and the blocking slide are configured to interact with each other such that a rotation of the actuator and a longitudinal displacement of the blocking slide are coupled, wherein a longitudinal displacement of the blocking slide coupled with a rotation of the actuator is possible irrespective of a position of the blocking slide, whereas a rotation of the actuator coupled with a longitudinal displacement of the blocking slide is possible only when the blocking slide is displaced outside the locking position, wherein the first movement transfer device of the drive plate interacts with the first movement transfer device of the blocking slide and the second movement transfer device of the drive plate interacts with the second movement transfer device of the blocking slide, wherein the first movement transfer device of the drive plate comprises a cam, and wherein the first movement transfer device of the blocking slide comprises a link configured to receive the cam, and wherein the blocking slide has a locking head provided on an end facing away from the drive plate, and wherein the cam and the link are disposed relative to one another such that when the blocking slide is outside the locking position, the cam is in contact with the link at least on one side, and in the event of a movement of the drive plate and the blocking slide relative to one another, the cam slides along the link, and when the blocking slide is in the locking position, in any case on the side of the cam facing the locking head, the cam is at a distance from the link.

7. The locking device according to claim 6, wherein the link comprises a slot and the cam is circular when viewed in a cross section and has a straight portion, wherein the straight portion is arranged such that it faces the link in the locking position.

8. The locking device according to claim 7, wherein a width of the slot and a diameter of the cam outside the straight portion are coordinated with each other, such that the cam is movable with a play within the slot.

Description

(1) The invention will be explained in greater detail hereinafter on the basis of a preferred exemplary embodiment with reference to the drawing, in which:

(2) FIG. 1 shows part of a locking device for a plug-in connection between a plug (not illustrated in greater detail) and a socket in accordance with a preferred exemplary embodiment of the invention,

(3) FIG. 2 shows the accommodation of the part shown in FIG. 1 in a housing together with a blocking slide in accordance with the preferred exemplary embodiment of the invention,

(4) FIG. 3a shows the interaction between a drive plate and a blocking slide of the locking device in accordance with the preferred exemplary embodiment of the invention outside the locking position from the side on which a cam contour cooperates with a stop,

(5) FIG. 3b shows the interaction between the drive plate and the blocking slide of the locking device in accordance with the preferred exemplary embodiment of the invention in the locking position from the side on which the cam contour cooperates with the stop,

(6) FIG. 4a shows the interaction between the drive plate and the blocking slide of the locking device in accordance with the preferred exemplary embodiment of the invention outside the locking position from the side on which a cam cooperates with a link,

(7) FIG. 4b shows the interaction between drive plate and blocking slide of the locking device in accordance with the preferred exemplary embodiment of the invention in the locking position from the side on which the cam cooperates with the link, and

(8) FIG. 5 shows the arrangement of the cam within the link in the locking position in accordance with the preferred exemplary embodiment of the invention in an enlarged illustration.

(9) Part of a locking device for a plug-in connection between a plug (not illustrated in further detail) and a socket in accordance with a preferred exemplary embodiment of the invention can be seen from FIG. 1. The locking device here is part of the socket and has a motor 1, of which the shaft is provided with a detent device 2. A drive plate 3 is latched onto the detent device 2 and, together with the shaft of the motor and the detent device 2, forms an actuator 4 for the locking device.

(10) As can be seen from FIG. 2, the actuator 4 is accommodated in a housing 5, which also accommodates a blocking slide 6. The housing 5 has guide devices 7 for the blocking slide. The blocking slide 6 and the drive plate 3 of the actuator 4 are interconnected, and reference is made in this regard to the figures described hereinafter.

(11) As can be derived from FIGS. 3a and 3, the drive plate 3 has a cam contour 8, with which the drive plate interacts with a stop 9 of the blocking slide. The cam contour 8 is formed in such a way that it has a longer curved region 10 and a shorter straight region 11. Due to the rotation of the drive plate 3, the blocking slide is pushed to the right. This movement to the right corresponds to a movement from an unlocking position into a locking position. Although not of further interest for the present invention, it can thus be noted briefly in this regard that the locking function is attained via a locking head 12, which in the locking position prevents a detent hook (not shown here in greater detail) of a charging plug from moving radially, which would enable a detachment of the charging plug from the socket.

(12) The system formed of drive plate 3 and blocking slide 6 can be seen from the other side from FIGS. 4a and 4b. It can be deduced from these figures that the drive plate 3 has a cam 13, which engages with a link 14 in the blocking slide 6, said link being formed as a slot. Due to a rotation of the drive plate 3, a force is exerted onto the link 14 via the cam 13, such that the blocking slide 6 is movable longitudinally in both directions. Here, it is key, as illustrated in FIG. 5, that with maximum rotation of the drive plate 3, in which case the straight region 11 of the cam contour 8 comes to bear against the stop 9 of the blocking slide 6, a spacing 15 is provided between the cam 13 and the link 14. The cam 13 therefore does not bear against the link 14 in its region facing the locking head 12, since the cam, in its region facing the link in this position in the direction of the locking head 17, is not circular, as it is in the other region, but has a straight portion.

(13) The function of the locking device in accordance with the present exemplary embodiment is then as follows:

(14) When the drive plate 3 of the actuator 4 is driven by the motor 1, the blocking slide 6 is slid forwards in the direction of the locking position until the cam 13 is disengaged. This is ensured by the cam contour 8 on the drive plate 3. During the forwards motion the curved region 10 of the cam contour 8 is in contact with the stop 9, whereas once the locking position has been reached the straight region 11 of the cam contour 8 comes into contact with the stop. In this position the aforementioned spacing 15 is now produced between the cam 13 and the link 14. If it were now attempted to push the blocking slide 5 back from the locking head 12, the corresponding force would be conveyed linearly into the drive shaft, since it is taken up by the straight region 11, which bears against the stop 9 of the blocking slide 6. A movement of the drive plate 3 by rotation or a movement of the blocking slide 6 by displacement therefore is not attained. When the blocking slide 6 is to be unlocked, the drive plate 3 is pushed back with the aid of the motor 1 and in doing so withdraws the blocking slide 6 with the rear side of the cam 13, which now interacts with the link 14.

(15) On the whole, due to the various functions of cam contour 8 and stop 9 on the one hand and also of the cam 13 and the link 14 on the other hand, the rotation of the drive plate 3 always causes a longitudinal movement of the blocking slide 6, whereas no movement and therefore also no unlocking of the locking device is possible by means of a pressure on the blocking slide 6 in the locking position. This is ensured on the one hand by the spacing 15 between the cam 13 and the link 14 in the locked state and also by the straight region 11 of the cam contour 8, which in the locked state bears against the stop 9 of the blocking slide.

LIST OF REFERENCE SIGNS

(16) 1 motor 2 detent device 3 drive plate 4 actuator 5 housing 6 blocking slide 7 guide devices 8 cam contour 9 stop 10 curved region 11 straight region 12 locking head 13 cam 14 link 15 spacing