Electrically driven door lock.

The invention relates to an electric motor-driven door lock according to the preamble of claim 1.

From DE-A-36 06 620. driven by electric motor door lock is known, the latch can be retracted by an electric motor via a gear mechanism in the lock housing and extended from the lock housing. The output gear of the transmission is formed as a gear segment which meshes with a firmly connected with the locking rack toothing. In the retracted position of the bolt the gear segment moves out of the rack tooth and moves over a change lever following a trap. The known door lock can thus including confiscate the case of electrically controlling, for example, by means of an electronically coded key. The pushing-in spring-biased case, however, can open manually via a lever handle. In order to be able to open the latch of the door lock manually in an emergency or in case of failure of the electrical control, additional mechanical cylinder lock is provided by a pivotally mounted gear of the transmission can be disconnected from the drive path of the motor and engaged with a driving gear of the spindle hole ,

The transmission of the known door lock is comparatively complicated, and for manual feeding of the bolt an additional cylinder lock is required.

The object of the invention to reduce the design effort of the known door lock and in particular to simplify the electric motor coupling with the locking gear, being intended to ensure that the bolt, for example in emergency situations can be fed manually, without the manual transmission must be switched or the mechanical components of the electric motor drive are impaired.

This object is achieved by the features specified in the characterizing portion of claim 1.

In the context of the invention to implement the rotational movement of the electric motor provided in a translational movement of the rack teeth is not provided directly on the bolt, but to a transverse to the bolt movement translationally displaceably guided control part. The control member is coupled for both directions of movement of the locking bar via inclined surfaces thrust to the bolt. The control part can be moved over the the retracted end position of the lock position assigned out and takes over a driver stop the event in the feed direction with. The case is independent of the control by the control part conventionally via a latch nut manually retractable otherwise. For manual retracting the latch to leading from the engine transmission chain must not be separated.

The measures of claim 2 allow to open in emergency situations of expected only on the inside of the door lever handle not only the case, but also mechanically retract the bolt. It must be manually switched to another gear train no gears of the transmission. The overload clutch also protects the engine and gearbox from overload damage. The overload clutch may be a slip clutch or locking coupling, particularly as a detent coupling, formed. Optionally, can also be formed by a radially movable mounted and resiliently biased into engagement with its counter teeth intermediate gear, the overload clutch.

The control part is expediently transversely to the direction of the case on this to be displaced for the retraction movement of the bolt and acts only when its about the retracted position of the bolt also leading motion a driving stop or the like in the feed direction on the case a. The translational drive of the trap in the feed direction can be in this case, realized starting from the electric motor-driven control part in different ways. In the embodiment according to claim 8, the control part is guided only translationally during the bolt shifting hubs. In the retracted position, the guide releases the control member for pivotal movement of his trap adjacent end in the feed direction of the case, so that the driven by the electric motor control section can execute a pivoting movement and drive the case directly in the feed direction. In a second variant according to claim 9, the translationally guided control part takes the case on a sloping surface gear in the feed direction. A similar effect is achieved as claimed in claim 10 with an angle lever which deflects the thrust of the case transverse to the movable control part in a force acting in the feed direction of the case thrust.

The control member is expediently guided on side walls of the lock housing. In plug-in door locks, according to claim 13, preferably, the face-plate, which forms a narrow side wall of the lock housing, is exploited. In this way can be at relatively low construction costs, a stable and precise guidance reach.

The control part is advantageously to secure the bolt against forcible pushing or pulling with exploited. according to claim 14, this is achieved by extending at right angles to the movement direction of the bar end portions of the control part-coupling with the latch cam drive slot. according to claim 15, however, may alternatively, or in addition to the control part or the bolt in the direction of movement of the control part extending, end open slot can be provided, engages into the pulled-in the end position of the bolt, a locking projection on the respective other part.

Embodiments of the invention are explained in detail using a drawing. In the drawing:<ul><li>FIG. 1 is a side view of an electric motor-driven push-in door lock when pushed-out bolt and being outworked case, the clarity is lost because of a side wall;</li><li>Figure 2 is a partial sectional view through the door lock, as seen along line II-II in Fig. 1.</li><li>Figure 3 shows a side view of the door lock of Figure 1, eject latch and pushed out the case..;</li><li>Figure 4 shows a side view of the door lock of Figure 1, eject latch and motorized reclusive case..;</li><li>Figure 5 is a side view of the door lock of Figure 1 during manual opening..;</li><li>.. 6 shows a side view of an insertable into the door lock according to Figure 1 overload clutch;</li><li>Figure 7 is a sectional view of the overload clutch, as seen along a line VII-VII in Fig. 6.;</li><li>Fig. 8 and 9, variations of the overload clutch; </li><li>10 is a side view of a variant of an electric motor-driven push-in door lock, similar to the door lock of Figure 1 with pushed-out bolt and being outworked case..;</li><li>FIG. 11 is a side view of the door lock according to FIG. 10 with an electric motor and retracted bolt being pushed the event and</li><li>FIG. 12 is a side view of another variant of a plug-in door lock similar to the door lock of Fig. 1, when pushed-out bolt and being outworked case.</li></ul>

Figs. 1 and 2 show a plug-in door lock with a narrow side arranged by side wall panels 1, 3 and a face plate 5 limited lock housing 7. In the lock housing 7 a trap 9 is guided perpendicular to the faceplate 5 displaced, the head 11 is not illustrated by a illustrated opening the faceplate 5 exits and their tail is 13 out on a stationary, engaging in a slot 15 of the tail 13 pins 17th A lock housing on 7 supported leg spring 19 biases the latch 9 in the extension before. The case 9 can be retracted by means of a pivotally mounted in the lock housing 7 spindle hole 21 by means of a pusher not shown in detail, arranged on the inside of the door against the leg spring 19th The spindle hole 21 has for this purpose a finger 23, the 13, the case 9 takes along a shoulder 25 of the latch tail in the feed direction. A return spring 27 holds the spindle hole 21 in the case of 9-releasing rest position.

In the lock housing 7 is spaced apart from the case 9, a bolt 29 perpendicular to the face plate 5 carries slidably ge which passes with its bolt head 31 through a non-illustrated opening the face plate 5 and with its bolt tail 32 within the lock housing 7 fixed to the housing between two pins 33 is performed 35th The latch 29 is pulled and pushed, which is also independent of the lever handle the case draws 9 by an electric motor 37th The electric motor 37 is controlled by a control circuit not shown in detail, as it is described for example in DE-A-36 06 620th The controller can respond to this an electronically coded key and include a arranged in a lock cylinder channel 39 of the door lock reader for the key.

The electric motor 37 drives via a gear transmission 41 to a plate-shaped control part 43 which is between the inner side of the faceplate 5 and the pins 33, 35 is guided at right angles to the direction of movement of both the latch 9 and the bolt 29 to be linearly displaceable. The arranged between the latch 9 and the bolt 29 Transmission 41 includes a seated on the output shaft of the electric motor 37 worm 45, which meshes with a in the side wall panel 1 on the one hand and a housing-fixed bearing plate 47 on the other hand mounted worm 49th The worm wheel 49 is coupled via a subsequently explained in greater detail, only a predetermined torque transmitting overload coupling 51 with a coaxially arranged pinion 53 which in turn meshes with a gear 55th The gear 55 drives a pinion 57, which in a parallel to the face plate 5, ie parallel to the direction of displacement of the control part 43 extending rack tooth 59 engages, the control part 43 at. Perpendicular to the direction of movement of the bolt 29 extending sliding movement of the control part 43 is engaged via a oblique to both directions of movement extending slot 61 in the control part, in which a mounted on the bolt 29 pin 63 is transmitted to the latch 29th

FIG. 1 shows the door lock in locked state, ie completely pushed-out from the lock housing 7 latch 29, in which the control part is provided in its trap 9 remotely located position 43. Fig. 3 shows the door lock in retracted bolt 29, but being pushed trap 9, in which the electric motor 37 has the control part 43 of the latch 9 approximated by retraction of the bolt 29. As shown in FIGS. 1 and 3, has the movement of the bolt 29 controlling slot 61 is substantially Z-shape with the ends of an obliquely both extending transversely to the direction of movement of the bolt 29 and the direction of movement of the control member 43 the central portion 65 of the slot 61 perpendicular to the direction of the bar 29 extending end portions 67, 69 connect. The end sections 67, 69 take in the fully retracted or fully inserted position of the bolt 29 the pin 63, thereby ensuring forced to insert or remove the bolt 29. As an additional safeguard, a pin 71 is fixed to the bolt head 31 is mounted, the in the fully extended position of the bolt 29 engages in an open in the direction of slot 73 of the control portion 43rd The pin 71, which may alternatively be also attached to the control part 43, and then enters into a slot of the bolt head 31, secures the bolt 29 against forcible insertion.

The control part 43 also controls the feed motion of the case 9. The case 9 adjacent transmits the control part 43 a finger 75, which retracts, retract bolt 29 in a limited by a shoulder 77 of the recess latch tail. 13 The rack gear 59 extends over the space required for the bolt movement, the face plate 5 parallel rectilinear region addition and is in a region in which the pin 63 of the bolt head enters the end portion 69 of the slot 61 31 is bent toward the face plate 5 so that the meshing with the rack gear 59 pinion 57 the control member 43 pivots about the pin 63 around in the figures in clockwise direction. The finger 75 takes this, as FIG. 4 shows the case 9 in the feed direction with. Fig. 4 shows the door lock with an electric motor retracted bolt 29 and an electric motor retracted case 9. In order to enable the pivotal movement of the control part 43, are the bolt tail 32 leading pins 33, 35 arranged so that the control part 43 for pivotal movement between the pin 33 can tilt 63rd The face plate of the adjacent corner is provided with a flat 79th

The door lock can be independent of the electric motor drive need be manually opened by pressing the door handle even if the latch 29 is pushed further (panic function). As Fig. 5 shows, is pivoted by rotating the means arranged on the inside of the door, on the secure side of the door trigger, the Drükkernuß with which the fingers 23 on the proposed the catch tail 13 shoulder 25, the event draws. 9 At the same time takes a molded onto the spindle hole 21 projection 81, the control part 43 in the opening direction of the latch 29 with. The projection 81 kicks in this case on a projection 83 of the control part 43, for example one being bent tabs of the control part 43, to. The forced movement of the control part 43 is transmitted through the inclined surfaces of the slot 61 and the pin 63 on the latch 29, which is thereby displaced into its retracted position. The arranged in the drive path of the transmission 41 between the electric motor 37 and the control part 43 the overload clutch 51 is overcome by the manual operation of the control part 43 and coupling from the self-locking screw per se 45th The overload clutch 51 also protects in electric motor drive of the door lock the electric motor 37 and the gear 43 against overloading.

Figs. 6 and 7 show details of the overload clutch used in the door lock of Fig. 1 51. In the illustrated embodiment, the overload clutch is in the drive path between the meshing with the worm 45 worm gear 49 and the same axis as the worm wheel 49 arranged pinion 53 arranged. However, the overload clutch 51 can also be provided at any other point of the transmission 41st

The overload clutch 51 of Fig. 6 and 7 is formed as a locking clutch, and includes a pawl 85 that 49 parallel pivot axis is pivotally supported on the worm wheel 49 by a pin 87 about an axis of rotation of the worm wheel. The relative to the worm wheel 49 seated on a common axle 89 pinion 53 carries a clutch disc 91 which is rotationally fixedly connected to the pinion 53 via projections 93 by positive locking. The clutch disc 91 has a latching recess 95, into which engages a complementarily shaped pawl 97 of the pawl 85 on its outer periphery. A fungal head rivets 99, 101 of the worm wheel 49 of a seites and the pawl 85 on the other hand guided annular segment spring 103 biases the pawl 85 radially against the clutch disk 91. When a certain by the spring force and the shape of the locking members torque is exceeded, the pawl 97 of the pawl 85 from the engaging recess 95 of the clutch disk lifted 91 and the pinion 53 is uncoupled from the worm wheel 49th

FIGS. 8 and 9 show variants of the overload coupling which can be used instead of the overload clutch 51 of the door lock in FIG. 1. In the following description, equivalent components with the reference numerals of FIG. 1 to 7 called and equipped to distinguish with a letter. For further explanation reference is made to the description of FIGS. 1-7 reference.

Fig. 8 shows a slip clutch in the drive path 51a of the transmission between the meshing with the worm 45a and worm wheel 49a which on a common shaft 89a to the worm gear 49a rotatable relative to the pinion 53a. In a recess 105 of the worm wheel 49a sits a Reibringscheibe 107 of an elastomeric elastic material. A rotationally fixed via pins 93a through form-locking connected to the pinion 53a clutch disc 91a lies flat rubbing against the Reibringscheibe 107th The axial Reibvorspannung generated by the elastic properties of Reibringscheibe 107, the axial reaction forces of the side wall panel 1a of the door lock and the bearing plate are recorded 47a of the transmission. It is understood that the axial prestress can be generated by separate springs.

Fig. 9 shows an overload clutch 51b, in which one of the stages gear wheels is mounted radially movable, so that it can come out of engagement with its counter-toothing when a predetermined torque is exceeded. In the overload clutch 51b which is the screw 45b meshing worm 49b rotatably connected to the fitting on the common axis 89b pinion 53b. The axis 89b is on both sides of the gears 49b, 53b mounted in Lagerbuchssen 109, 111 of an elastomeric elastic material. The bushings 109, 111 sit in the side wall panel 1b of the door lock or the bearing plate 47b of the gear and take in case of overload of the drive path radial spring 49b, the radial yielding movement of the gears 53b and 89b on its axis. It is understood that the axis 89b and otherwise guided radially deflected and radially fe may be biased with horror. The axis 89b may particularly in elongated holes of the plates 1b, 47b to be guided radially.

In the following, variants of the electric motor-driven push-in door lock are described, which differ from the door lock of Fig. 1 substantially only by the type of coupling of the control part with the trap. Equivalent components are designated with reference numerals of Fig. 1 and to distinguish by an additional letter. For a more detailed explanation of the construction and the mode of action is made to the description of Fig. 1-7 reference. Also in the below described variations of the door lock described with reference to FIGS. 8 and 9, variations of the overload clutch may be used.

The control part 43c of the in Figs. 10 and 11, door lock shown is in turn between the face plate 5c on the one hand and guide pins 33c, slidably guided 35c of the bolt tail 32c perpendicular 29c to the movement direction of the bolt and on the inclined thrust slot 61c and the guide pin 63c coupled to the latch 29c , The control part 43c is guided exclusively linearly displaceable and carrying at its end adjacent to the trap 9c one thrust finger 113, which is opposite to the case of an oblique thrust surface 9c 115th Fig. Figure 10 shows the door lock bolt with pushed-out 29c, in which the electric motor 37c, the control part 43c through the transmission 41c and in this embodiment, a total straight rack tooth portion 59c has moved into the trap 9c its remotely located position. Fig. 11 shows in solid lines in the door lock bolt is retracted by an electric motor 29c. In this position, the push fingers 113 of the oblique thrust surface 115 of the case 9c has approached. If the control part 43c driven in the feed direction of the bolt 29c continue, so does the push fingers 113 the case 9c in feed direction to the in Fig. 11 in broken lines, retracted position with. In Falleneinzugshub the control section 43c of the pin engages in the 63c in the direction of displacement of the control part 43c extending end portion 69c of the oblique thrust slot 61c a. The oblique thrust surface 115 forms the boundary of a recess in the case 9c, so that the case 29c regardless of the motorized adjustment of the bolt can be retracted manually using the door handle. The arranged in the drive path of the transmission 41c between the electric motor 37c, and the control part 43c overload clutch 51c in turn protects the drive path from overloading and allows via the driving stops 81c, 83c of the spindle hole 21c, the control part 43c, the unlocking and opening of the door lock in emergency situations.

The electro-motor-driven Einstecktürschloß of Fig. 12 has a turn along the face plate 5d-run control section 43d, which is coupled via a forward thrust slot 61d for both directions of movement to the latch 29d. The electric motor 37d drives the control part 41d in both movement directions via the gear 41d and provided at the control section 43d of rack tooth 59d. For driving the case 9d in feed direction, an angle lever 117 is pivotally mounted on the lock housing 7d entrained with its first arm 119 from one of the case 9d adjacent abutment surface 121 of the control section 43d to the case 9d back and with his other arm 123 on the the catch tail 13d provided shoulder 77d the case 9d entrains in feed direction. Fig. 12 shows in solid lines the door lock when pushed-out bolt 29d and be pushed in the case 9d. The control part 43d is located here in his trap 9d remote position. If the control section 43d approximated from the electric motor 37d of the trap 9d, the bolt is retracted 29d, and in which on the retracted set ting of the bolt 29d beyond stroke of the control portion 43d is retracted below the trap 9d via the angle lever 117th Fig. 12 shows with dashed lines, the control part 43d and the angle lever 117 with retracted case 9d.

The will in the drive of the gear 41d provided overload clutch 51d protects again the one hand the drive path from overload and allows the manual opening of the locked door lock by pressing the trigger. The latch nut 21d carries a driver stop 81d, who takes over a counter-stop, here in the form of a recess 83d into which the stopper 81d, the control part 43d in the opening direction of the bolt 29d.

For additional securing of the bolt 29d against forcible pushing a projection 125 is formed on the case far side of the control section 43d can be supported in the fully inserted bolt 29d on a stationary pin 127th This type of additional slide protection can also be provided in the above-described door locks.