DE3328667A1 - MOTOR VEHICLE DOOR LOCK, HOOD LOCK OD. DGL. WITH MOTORIC LOCKING AID - Google Patents

Abstract

1. A motor vehicle door lock, bonnet lock or the like with a locking latch (3), preferably a fork latch mounted on a swivel, a lock pawl (4) securing the locking latch (3) in the locked position, at least one actuation rod (5) for the locking latch (3) and the lock pawl (4), a servomotor (6) provided with gears if necessary, rotating in one direction only and preferably constructed as an electric motor, in which the servomotor (6) is connected on its power take-off side to a crank arm (7) and the crank arm (7) is articulated to the actuation rod (5), the locking latch (3) can be brought by means of the servomotor (6) from a pre-closing position into a fully-closed position and vice versa, and at least two stopping points (I, III) are provided for the servomotor (6), characterized in that the actuation rod (5) is constructed as an overload protection unit or is provided with an overload protection unit and that when a specified pressure force or tensional force is exceeded the actuation rod (5) can be forced together or extended from its normal working length to an overload length.

Description

'Gesthuysen & von Rohr

- V-

83.272.sr

Essen, July 18, 1983

of the company

concerning a

Patent application

BOMORO Bocklenberg & Motte QnbH & Co. KG

Beautiful view

5600 Wuppertal

"Motor vehicle door lock, hood lock or the like, with motorized locking aid"

Patent Attorneys · Dipl.-lng. Hans Dieter Gesthuysen ■ Dipl.-Phys. Hans Wilhelm von Rohr COPY 4300 Essen 1, Huyssenallee 15, phone: 0201/233917, telex: 08 57 99 90

GesthuyserV & von Rohr

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The invention relates to a motor vehicle door lock, hood lock or the like. with a lock latch, preferably a pivotably mounted fork latch, a pawl that locks the lock latch in the closed position, at least an actuating rod for the latch and the pawl and a rotating in only one direction of rotation, preferably designed as an electric motor and optionally provided with a gearbox auxiliary motor, the auxiliary motor being connected on the output side to a crank arm and the crank arm is pivotably articulated to the actuating rod, the lock latch by means of the auxiliary motor from a pre-locking position into a main locking position and vice versa can be brought and at least two holding points are provided for the auxiliary motor.

For some time now, automobile door locks have been automobile hood locks Od. Like. Known, which are provided with a motorized closing aid. On the one hand, this is a question of the ease of use of vehicles, on the other hand is related to increasingly strict safety regulations for motor vehicle door locks, motor vehicle hood locks or the like. Motorized locking aids have so far only been particularly widespread in motor vehicle hood locks or motor vehicle door locks for Tailgates and rear doors of station wagons. The reason for this is that hoods, tailgates and rear doors often have considerably larger surfaces and thus also have edge-side sealing surfaces as side doors of motor vehicles, so that the closing forces to be applied are extraordinary are large in order to ensure a sufficient sealing force on the circumferential seal. In addition, hoods, tailgates and rear doors are usually considerable lighter than side doors of motor vehicles, so that the corresponding hood lock or door lock can only be engaged with violent slamming the hood or the like. Can achieve.

Now, for security reasons, it is especially with door locks for rear doors of Kornbikraftfahrzeuge regulation, a pre-locking position for the lock latch (Preliminary detent) and a main closed position (main detent) to be provided. While bringing the lock latch into the pre-locking position

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only very low closing forces occur on the way between the pre-closed position and main closed position abruptly open the previously explained high closing forces determined by the circumferential seal. Both known motor vehicle door locks is the lock latch easily by closing the corresponding door by hand in the forward position can be brought while moving from the forward position to the main closed position is covered by means of the auxiliary motor, so that the high closing forces are applied by the auxiliary motor.

The starting point of the teaching of the invention in detail is a known motor vehicle hood lock (See. US-PS 33 78 291), in which the lock latch can be brought into the forward position by hand and in this by the pawl is blocked, in which, furthermore, at the same time as the pawl engages, an electrical switch is actuated and the auxiliary motor is switched on is and then pulled together by means of the auxiliary motor lock latch and pawl into the lock housing of the hood lock will. The lock bolt of this main lock, which is firmly attached to the body serves as an abutment, so that the hood is pulled close to the body and thus the main closed position by the retraction movement is achieved. The forward position of the lock latch corresponds here the bottom dead center of the crank arm connected to the auxiliary motor, while the main closed position corresponds to the top dead center of the crank arm. In the main closed position, the lock latch is held here by the auxiliary motor itself. Coaxial with the crank arm is on the auxiliary motor a cam disk is arranged, which has two switching cams cooperating with a switch, through which the two holding points of the auxiliary motor To be defined. The auxiliary motor itself rotates in only one direction of rotation, which is advantageous in terms of control.

In the previously explained, known motor vehicle hood lock, there is a certain problem that between the hood and the frame or the circumferential Seal objects or even limbs of people can be pinched, in such a way that the pre-closed position of the

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Hood lock can still be reached, but reaching the main locking position is impossible or leads to significant damage to property or injuries. Once the forward position has been reached, in the known hood lock the auxiliary motor is inevitably switched on and pulls the hood against the frame with great force. Either the auxiliary motor is now blocked and burns if no overload protection circuit is provided, or the auxiliary motor must be designed for both directions of rotation so that an overload protection circuit can be used to reverse the direction of rotation, which allows a return to the forward position. The but of the auxiliary motor ¹ is on the one hand with respect to technically complicated, on the other hand leads to a continual back and forth of the auxiliary motor.

Another problem with the known motor vehicle hood lock that was previously has been explained, there is a risk of injury when the hood is open. By operating the lock latch and the pawl, namely the auxiliary motor can also be switched on with the hood open and, under unfavorable circumstances, a finger or hand of the person handling it Trapping person.

The invention is based on the prior art explained above Now the task of a motor vehicle door lock, hood lock or the like. To specify in which while maintaining an auxiliary motor with only one Direction of rotation, comprehensive protection against injuries or property damage as a result of trapped limbs or objects is guaranteed.

The motor vehicle door lock, hood lock or the like according to the invention which the above-mentioned object is achieved, is characterized in that the actuating rod is designed as an overload protection element or · with an overload protection element is provided and that the actuating rod when a certain compressive force or tensile force is exceeded from its normal Working length is collapsible or extendable to an overload length. If a closing force of 1,000 N is required, for example

Gesthuyserr & von Rohr

and a reduction takes place in the motor vehicle door lock according to the invention in a ratio of 1: 5, the maximum compressive force or tensile force on the actuating rod is equal to 200 N. If, for example, in the case of a Movement of the lock latch from the pre-locking position into the main locking position pressure-loaded actuating rod, a pressure of 200 N is reached, the overload protection element pushes together, so that the normal working length of the operating rod is shortened. The auxiliary motor can therefore keep the crank arm in the intended direction of rotation turn without moving the lock latch any further. With skillful design This motor vehicle door lock can, when the stopping point assigned to or following the main locking position (stopping point II) the lock latch can even fall back into the pre-closed position. Without the auxiliary motor in both directions of rotation in a costly manner would have to be designed and without the need for an electronic overload protection circuit for the auxiliary motor, is nevertheless an excellent one Overload protection of the motor vehicle door lock as a whole and thus excellent protection against injuries or damage to property as a result trapped limbs or objects.

For the sake of order, it should be noted that instead of a Electric motor running auxiliary motor, of course, "other motors, for example Hydraulic motors or the like, can be used. It should also be noted that the following explanation of the invention is based on a motor vehicle door lock for a rear door of a station wagon has only an exemplary character, without the applicability of the teaching of the invention to other motor vehicle door locks, hood locks or the like.

As previously stated in explaining the teaching of the invention is, the entire effective length of the operating rod with overload protection element must be in the event of a pressure load on the overload protection element be reduced when a certain compressive force is exceeded.

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Gesthitysen & von "Rohr

In this case in particular, it is recommended that the actuating rod be telescopic train collapsible. Even with pure tensile load on the actuating rod with the overload protection element in the overload-prone area However, a telescopic actuating rod is useful in the area.

There are a large number of designs for the overload protection element of possibilities. The most obvious solution for the design of the Overload protection element is a helical spring, i. H. a helical compression spring or a helical tension spring. A disc spring column or a plastic spring element would also be conceivable.

All the aforementioned Überlastscliutzelemente have in common that the spring force changes largely steadily, mostly more or less proportionally with the spring travel. So without special measures is difficult to achieve a force / path characteristic that has a largely constant working length until the specific compressive force or tensile force is reached then shows a sudden change to the overload length. Here recommends it is now particularly, the overload protection element as on a certain Form trigger pressure adjusted gas pressure spring. Hydraulic pressure springs too come into question here in the same way. It is essential to achieve a more or less step-like force / path characteristic of the overload protection element.

Instead of the previously explained embodiment of an overload protection element a slip clutch can also be used, particularly with a coaxial arrangement of the auxiliary motor and lever mechanism of the motor vehicle door lock think. In this way, the operating rod could be switched off for a short period of time in terms of effect in the area at risk of overload, resulting in a lower (compressive force) or greater (tensile force) overload length is equivalent.

With regard to the further embodiment of the motor vehicle door lock according to the invention, -Haubonschlosses od. Like. It is recommended, as is well known in motor vehicle door locks, the lock latch both in the

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Forward position as well as in the main closed position of the pawl to be locked, so to form a preliminary detent and a main detent for the pawl on the lock latch. Then the lock latch does not have to be by the auxiliary motor by means of the operating rod in the main closed position are held, but only by the auxiliary motor in the main closed position be brought to be held there by the pawl can. To here now on the one hand a motorized opening of the pawl from the main closed position to enable, on the other hand, the collapse of the pawl into the forward position (pre-latching) when the door is closed by Hand not to be hindered, the holding points of the auxiliary motor are expediently between the upper and lower dead center of the auxiliary motor connected crank arm provided.

Without additional control measures, there is a Motor vehicle door lock the risk that if the overload protection element has responded when the auxiliary motor moves and the door is in remains in the forward position, another rotation of the auxiliary motor is triggered so that it tries again to bring the door into the main closed position. So it is necessary to provide a repeat lock, what is achieved in that when the main closed position is reached or the following breakpoint, the auxiliary motor is switched off even if the latch is still in the main closed position has not achieved. It must therefore first be opened again before the door can be fully closed again.

In particular in the previously explained embodiment of an inventive Motor vehicle door lock, it is advisable to have an electrical or electronic scanning and display of the actual position of the pawl, if necessary also the lock latch to be provided. The display expediently takes place in the field of vision of the driver of the motor vehicle, so that the latter recognizes that, for example, the tailgate is not properly closed.

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The opening movement of the auxiliary motor is a turning movement from the stopping point II back to breakpoint I, in the course of which the pawl is opened and the latch is released. Due to the inherent elasticity of the seal, however, the corresponding door is usually only in the pre-closed position moved and held there by the re-engaging pawl. To give an operator a little more time to open the door, an embodiment of the motor vehicle door lock according to the invention is recommended, which is characterized in that between the breakpoints an intermediate breakpoint corresponding to the open position of the pawl is provided and the auxiliary motor to continue running from the intermediate stop point to the pre-locking position assigned or following stop point Can only be switched on after opening the door, hood or the like.

Previously it has already been explained several times that the auxiliary engine on the The crank arm and the actuating rod with the overload protection element and the latch from the pre-locking position into the main locking position as well as the pawl from the main notch corresponding to the main closed position the lock latch should be movable out. These are basically opposing movements that are generated by the auxiliary motor during one revolution both should be feasible. A special embodiment of the motor vehicle door lock according to the invention is recommended here, which thereby is characterized in that a circular segment-shaped, pivotable link plate is provided and at its end remote from the pivot axis to the Actuating rod is pivotably articulated that the link plate has an arcuate elongated hole and that in the elongated hole at one end Driving pin of an auxiliary link actuating the lock latch and on the other The end of a driving pin engages the pawl. For a particularly preferred embodiment of the motor vehicle door lock with Pressure load responsive overload protection element is the driving pin of the lock latch actuating auxiliary link expediently on the Auxiliary motor facing end of the elongated hole and the driving pin of the

Pawl provided at the end of the elongated hole remote from the auxiliary motor.

BATH ORIGINAL

Gesthüy-sen · & vorv-Rorw "- -" '- -

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At the beginning and in to: jiimenhang with the task of teaching this Invention has been explained that in particular injuries to operators should be excluded. As has been explained, one source of injury is through improper operation even when the hood is open the motor vehicle door lock given. For this purpose, it is now advisable to choose an embodiment that is characterized in that a with sufficiently closed position of the door, hood or the like. Responsive fuse switch is provided and that the auxiliary motor only when addressed Fuse switch can be switched on.

In the following, the invention is explained in more detail with reference to a drawing showing only one embodiment; it shows

Fig. 1 in a schematic representation of an embodiment of an inventive Motor vehicle door lock in the embodiment for the rear door of a station wagon in the position with the door open,

Fig. 2 in Fig. 1 corresponding representation, the motor vehicle door lock with the door pushed into the pre-closed position by hand,

Fig. 3 in Fig. 1 corresponding representation, the motor vehicle door lock The latch and the door have just been brought into the main closed position, the auxiliary motor is just passing through the bottom dead center,

Fig. 4 in Fig. 1 corresponding representation, the motor vehicle door lock with the door closed and the auxiliary motor switched off and

Fig. 5 in Fig. 1 corresponding representation, the motor vehicle door lock with the pawl held in the open position and the lock latch and door in the pre-closed position, i.e. ready to open.

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With reference to Fig. 1, the motor vehicle door lock according to the invention is initially intended are explained in detail in its structure. 2 to 5 then always show the same structure, only in different working positions.

The motor vehicle door lock shown in FIG. 1 is for the rear door 1 a station wagon determined. The lock cylinder 2 for external actuation can be seen on this door 1. Not shown is a to the motor vehicle door lock in the door 1 corresponding locking bolt on the door frame.

The motor vehicle door lock initially has a lock latch 3, namely a pivotably mounted fork latch, one of the lock latch 3 in the closed position locking pawl 4 (largely covered in Fig. 1 and therefore shown in dashed lines), an actuating rod 5 for the latch 3 and the pawl 4 and an auxiliary motor 6 (indicated schematically). The auxiliary motor 6 is designed as an electric motor rotating in only one direction of rotation and connected on the output side to a crank arm 7, which is only indicated. The crank arm 7 is pivotably linked to the actuating rod 5. the Lock latch 3 can be brought from a pre-locking position into a main locking position and vice versa by means of the auxiliary motor 6, whereby for the auxiliary motor initially two breakpoints I, II are provided.

The operating rod 5 is provided with an overload protection element 8 and tyei exceed a certain compressive force from their normal working length to an overload length collapsible. The operating rod is for this purpose 5 is designed to be telescopically collapsible and the overload protection element 8 is a gas pressure spring set to a specific release pressure formed, which is integrated into the telescopic actuating rod 5.

Gesthuysen ■ & in front of _T -pipe '-' -

In Fig. 1 it can be clearly seen that the lock latch 3 both in the Forward position as well as in the main closed position of the pawl 4 is lockable (preliminary catch 9 and main catch 10) and that the holding points I, II of the auxiliary motor 6 between the upper and lower dead center of the with the auxiliary motor 6 connected crank arm 7 are provided.

Circuitry ensures that when the main closed position is reached associated or following stopping point II, the auxiliary motor 6 is also switched off when the latch 3 is in the main closed position should not have reached yet. An electronic one corresponds to this Scanning and display of the actual position of the pawl 4, via which the reaching of the main notch 10 on the latch 3 is scanned and is displayed.

As FIG. 1 indicates, there is an intermediate stop between the breakpoints I, II III is provided, which corresponds to the open position of the pawl 4. The auxiliary motor 6 is to continue running from the intermediate stop point III to the stopping point I assigned to or following the forward position first can be switched on after opening the door 1, so that there is enough time for an operator to open the door 1.

1 shows a particularly preferred embodiment of one according to the invention Motor vehicle door lock, as a circular segment-shaped, pivotable link plate 11 is provided, which on its from the pivot axis 12 distant end 13 is pivotably articulated to the actuating rod 5 and has an arcuate elongated hole 14. In the elongated hole 14 of the link plate 11 engages at one end a driving pin 15 of an auxiliary link 16 actuating the lock latch 3 and a driving pin at the other end 17 of the pawl 4 a.

Finally, it is not shown in Fig. 1 that a sufficiently closed Position of the door 1 responsive fuse switch is provided, through which a prerequisite for putting into operation in the first place

Gesthuysen & von -Rohr

of the auxiliary motor 6 can be created.

The operation of the motor vehicle door lock according to the invention should will now be briefly explained with reference to FIGS. 1 to 5:

In Fig. 1 the motor vehicle door lock is shown in the open position, d. H. the door 1 is open, the latch 3 is in the open position, the auxiliary motor 6 is switched off at the stop point I. .Now the Door 1 closed by hand and printed in the forward position. Through this the latch 3 is also printed in the pre-locking position, the pawl 4 falls into the preliminary catch 9 and holds the lock latch 3 with the door 1 in this position. Since the safety switch controls the auxiliary motor 6 has already released, this can now be switched on, for example, by a switch that senses the position of the lock latch 3. Of the Auxiliary motor 6 begins to rotate in the counterclockwise direction and moves the link plate 11 downwards via the driver pin 15 the auxiliary link 16 is taken along, which via a correspondingly shaped contact surface 18 (see. Fig. 2) on a driving pin 19 of the lock latch 3 works. The latch 3 is moved from the pre-locking position shown in FIG. 2 into the main locking position shown in FIG. 3 and has just reached this main closed position in the illustration in FIG. 3. The pawl 4 has fallen into the main detent 10 and holds the latch 3 with the door 1 in the main closed position. The auxiliary engine passes through its bottom dead center with the crank arm 7 and then, shown in FIG. 4, comes to a standstill at the stopping point II. The door 1 is now safely closed.

Will not now, for example via the lock cylinder 2 or via one the inside operating lever shown initiates an opening movement of the door 1, so the auxiliary motor 6 starts up again and moves the crank arm 7 from stopping point II on, the auxiliary motor comes at intermediate stopping point III 6 to a standstill, which FIG. 5 shows. Fig. 5 clearly shows that

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the pawl 4 is here in the fully open position and that the latch 3 can accordingly be pivoted into the open position by hand. The door 1 can be opened easily.

Only when door 1 is open, i.e. after switching the safety switch, for example, the auxiliary motor 6 is released to continue running to the stop point I. The position of the motor vehicle door lock shown in FIG. 1 has arrived there reached again.

The effect of the actuating rod provided with an overload protection element 8 5 is shown during the movement of the auxiliary motor 6 with the crank arm from the position shown in FIG. 2 into the position shown in FIG. Is namely a Object jammed between the door 1 and the Türrar men, so the Lock latch 3 cannot be pivoted into the main closed position. The operating rod 5 with the overload protection element 8 is exceeded when a certain compressive force pushed together to their overload length, so that the auxiliary motor 6 vorr with the crank arm 7. Stopping point I to stopping point II can go through without the link plate 11 having to be pivoted fully down.

Claims (11)

Gestbuysen & von Rohr patent claims: 1. Motor vehicle door lock, hood lock or the like with a lock latch, preferably a pivotably mounted fork latch, a pawl locking the latch in the closed position, at least one actuating rod for the lock latch and the pawl and a rotating in only one direction of rotation, preferably designed as an electric motor and Auxiliary motor possibly provided with a gear, the auxiliary motor on the output side connected to a crank arm and the crank arm is pivotably articulated to the operating rod, the lock cases by means of the auxiliary motor from a forward position to a main closed position and vice versa can be brought and at least two holding points are provided for the auxiliary motor, characterized in that the actuating rod (5) designed as an overload protection element or provided with an overload protection element (8) and that the actuating rod (5) when exceeded a certain compressive force or tensile force can be pushed together or pulled apart from their normal working length to an overload length is. 2. Motor vehicle door lock according to claim 1, characterized in that the actuating rod (5) can be pushed together or pulled apart telescopically is. 3. Motor vehicle door lock according to claim 1 or 2, characterized in that that the overload protection element is designed as a helical spring. 4. Motor vehicle door lock according to claim 1 or 2, characterized in that that the overload protection element (8) than to a certain trigger pressure adjusted gas pressure spring or the like. Is formed. BAD ORIGINAL COPY Gcsthuys6R '& of pipe 5. Motor vehicle door lock according to claim 1 or 2, characterized in that that the overload protection element is designed as a slip clutch. 6. Motor vehicle door lock according to one of claims 1 to 5, characterized in that that the lock latch (3) both in the forward position as well as in the main closed position of the pawl (4) can be blocked and that the holding points (I, II) of the auxiliary motor (6) between the upper and the bottom dead center of the crank arm (7) connected to the auxiliary motor (6) are provided. 7. Motor vehicle door lock according to one of claims 1 to 6, characterized in that that when the stopping point (II) assigned to or following the main closed position is reached, the auxiliary motor (6) is switched off also takes place when the lock latch (3) has not yet reached the main closed position. 8. Motor vehicle door lock according to one of claims 1 to 7, characterized in that that an electrical or electronic scanning and display of the actual position of the pawl (4), possibly also the latch, he follows. 9. Motor vehicle door lock according to one of claims 1 to 8, characterized in that that between the breakpoints (I, II) an intermediate breakpoint (III) corresponding to the open position of the pawl (4) is provided and the auxiliary motor (6) to continue running from the intermediate stop point (III) to the pre-locking position assigned or following stop point (I) can only be switched on after opening the door (1), hood or the like. 10. Motor vehicle door lock according to one of claims 1 to 9, characterized in that that a circle-shaped, pivotable link plate (11) provided and at its end (13) remote from the pivot axis (12) is pivotably articulated to the actuating rod (5) so that the link plate (11) has an arcuate slot (14) and that in the slot (14) on r- 2 - ORIGINAL BATHROOM -Gestrruysen & von Röhr one end of a driving pin (15) of a lock latch (3) actuating Auxiliary link (16) and at the other end a driving pin (17) of the pawl (4) intervenes. 11. Motor vehicle door lock according to one of claims 1 to 10, characterized characterized in that a sufficiently closed position of the door (1), Hood or the like. Responding safety switch is provided and that the auxiliary motor (6) can only be switched on when the safety switch is activated.