Motor vehicle lock

Abstract

Motor vehicle lock, in particular for a body hood or a body door, comprising a housing (1) with a lever-shaped latch (2) pivotably mounted on a latch bolt (3) engaging with a ratchet (4) pivotally positioned about a ratchet bolt (5) between the open and closed positions, the ratchet being provided with a coil spring (10) for moving the ratchet (4) into the open position and a shaped catch recess (8) formed between radial arms (6a, 6b) for catching a catch bar (9) of the vehicle body, characterized in that a power-operated trailing ring (11) with a drive projection (15) is pivotably mounted coaxially with the ratchet (4), a follow-up latch (21) with a follow-up projection (23) is pivotably mounted on the ratchet (4), which is pivotably engaged with the follow-up projection (23) and the drive projection (15) of the follow-up ring (11) and in the housing (1) a means for deflecting the follow-up latch (21) from the engagement of the follow-up projection (23) in the path of the driver projection (15) of the follow-up ring (11) is arranged.

Description

Technical subject area

[0001] The invention relates to a motor vehicle lock, in particular for a body hood or body door, comprising a housing with a lever-shaped latch which is pivotably mounted on a latch bolt and engages with a ratchet pivoting bolt between the open and closed positions, and which is provided with a coil spring for bringing the ratchet into the open position and a catch recess formed between radial arms for catching a catch bar of the vehicle body. State of the art

[0002] Telescopic tube systems are predominantly used to close the rear doors and trunk lid of motor vehicles. These systems are positioned between the doors or lid and the fixed part of the body and are retracted by an electric motor, a spindle, and a spindle nut. The closing action is achieved by the force exerted by the electric motor, which moves the door or lid into a partially locked position. From this partially locked position to the fully locked position, the doors or lids are pulled forward by a latch located on the doors or lids. Latches for closing and opening rear vehicle doors and trunk lids typically have two functions: the function of forcing the ratchet mechanism from the partially locked to the fully locked position, and the unlocking function for unlocking the door or lid.

[0003] Document DE10 2004 036 654 discloses a device for automatically closing vehicle doors, in particular rear doors or side doors of a motor vehicle, which includes a drive mechanism that allows the vehicle doors to be moved from a partially secured pre-locking position to a fully secured end-locking position. The device comprises a stop element that can be moved from a locking position, in which it prevents the vehicle door from moving into its closed position, to a release position, in which it allows the vehicle door to move into its closed position. The stop element can be moved automatically or by a force drive, e.g., a pivot lever. In its locking position, the stop element engages directly or indirectly in the path of movement of the vehicle door.The vehicle doors can be locked in the pre-locking and fully locked positions. The device simply prevents the undesirable effects of excessive closing force.

[0004] Document DE19736445 discloses a motor vehicle lock with an electric motor for driving a steering wheel, which is connected via a pull rod to a control cam of the lock. The control cam is pivotally mounted on a support shaft, on which a ratchet is also pivotally mounted. The control ratchet is essentially L-shaped with two arms and can be pivoted to the left or right from the neutral position. The ratchet can be moved into a partially or fully locked position. Stop recesses are formed around the circumference of the ratchet, into which the projections of two latches engage successively. These latches are pivotally mounted outside the ratchet. The first latch is pivotally mounted at the free end of an arm of the control cam, and the second latch is pivotally mounted on a bolt connected to the lock housing.The ratchet has a molded recess around its circumference to catch and lock the catch eye, which is permanently attached to the body. When the catch eye engages in the positive-locking recess of the ratchet, the ratchet rotates counterclockwise against the spring tension into a partially locked position, and the first latch engages in the first engagement notch on the ratchet's circumference. In the partially locked position, turning the control wheel counterclockwise moves the control cam back one cycle. This action pushes the second latch from the half-engaged position into the second latch notch, and the ratchet moves from the partially locked position to the fully locked position. In the fully locked position, the second latch engages with the ratchet's circumference.Closing from the partially locked position to the fully locked position and unlocking the door or lid are controlled by a common controller consisting of a control cam. In the partially locked position, the door or lid's catch is positioned in the ratchet's cutout between its radial arms. In the partially locked position, an obstruction may occur between the door or lid and the vehicle body, preventing the ratchet from fully locking. The door or lid must then be reopened, and the entire process of locking the latch to the partially locked position must be repeated before the closing process to the fully locked position can be performed.Having to reopen and repeat the closing process of the door or lid is an undesirable complication. Nature of the invention

[0005] The object of the invention is a motor vehicle lock for vehicle doors and lids that allows the doors or lid to be pulled from the leaning position into the fully locked position, but does not initiate the pulling process if there is an obstacle between the door or lid and a fixed part of the body, leaves the door or lid in the leaning position and allows the pulling process to be repeated after the obstacle between the door or lid and the fixed part of the body has been removed.

[0006] The disadvantages of the prior art are essentially eliminated, and the objective of the invention is achieved by a motor vehicle lock according to claims 1 to 7, comprising a housing with a lever-shaped latch pivotally mounted on a latch bolt, and engaging with a ratchet pivotable about a ratchet bolt between the open and closed positions, and provided with a coil spring for bringing the ratchet into the open position and with a shaped catch recess formed between the radial arms for holding a catch bar of the vehicle body, according to the invention, the essence of which consists in a power-operated follower ring with a drive projection pivotally mounted coaxially with the ratchet, and a follower latch with a follower projection pivotally mounted on the ratchet.which is pivotably engaged with the drive projection of the pulling ring and a device for deflecting the pulling latch from the engagement of the pulling projection into the path of the drive projection of the pulling ring is arranged in the housing.

[0007] Advantageously, the means for deflecting the follow-through latch from the engagement of the follow-through projection in the path of the follow-through ring's drive projection can be a guide element mounted in a housing and provided with a guide surface that engages with the guide projection formed on the guide arm of the follow-through latch. Advantageously, the guide element can be arranged on a guide lever that is pivotably mounted in a housing. Advantageously, the guide lever can be pivotable between its initial position at the stop on a support projection fixed to the housing and a position that is angled away from the support projection, counteracting the force exerted by a coil spring.

[0008] Advantageously, the guide element can be slidably mounted in the housing between its initial position, engaged with a stop fixed to the housing, and its position away from the stop, resisting the force of the spring. Advantageously, the drive projection of the retracting ring can be arranged on one side of the radial drive arm of the retracting ring, the opposite side of which is provided with a rounded support surface in the radial direction for engagement with the catch bracket. Advantageously, the retracting latch can be provided with a retaining arm having an axially oriented retaining projection that engages with a radial retaining projection formed on the ratchet. Explanation of drawings

[0009] The motor vehicle lock according to the invention is explained with reference to the drawings, which show Fig. 1. Motor vehicle lock in the open position, the pull-back latch is out of engagement with the guide element, Fig. 2. Motor vehicle lock in the position before partial locking, the pull-back latch is in the transition to engagement with the guide element, Fig. 3. Motor vehicle lock in the partially secured position, the pull-back latch is engaged with the guide element, Fig. 4. Motor vehicle lock in the partially secured position, the pull-back arm is pulled back without engagement with the pull-back latch. Fig. 5. Motor vehicle lock in transition to the fully locked position, the pull-back latch is in transition to engagement with the pull-back arm, Fig. 6. Motor vehicle lock in transition to the fully locked position, the pull-back latch is engaged with the pull-back arm, Fig. 7. Motor vehicle lock in the fully locked position, the pull-back latch is engaged with the pull-back arm, Fig. 8. Motor vehicle lock in transition to the open position, the pull-back latch is released, Fig. 9 Motor vehicle lock with a guide element that can be moved within the housing. Fig. 10 Motor vehicle lock with a guide element fixed in the housing. Exemplary embodiments of the invention

[0010] After Fig. In the wall of the lock housing 1, the latch 2 is pivotally mounted on the latch bolt 3 and the ratchet 4 on the ratchet pin 5. The lever-shaped latch 2 engages with the ratchet 4, which pivots on the ratchet pin 5 between the open and closed positions and is equipped with a coil spring (not shown) that moves the ratchet 4 into the open position. The ratchet has radial arms 6a, 6b, between which a shaped catch recess 8 is formed for catching the catch bar 9 of the vehicle body. The housing 1 is provided with a guide recess 10 for guiding the catch bar 9 when the lock is opened and closed. A follower ring 11 with a radial follower arm 12 and a radial drive arm 14 is pivotally mounted coaxially with the ratchet 4.The radial trailing arm 12 is provided at its end with an opening 13 for connection to a transmission mechanism (not shown), which is driven, for example, by an electric motor in the direction of rotation α, which coincides with the direction of rotation of the ratchet 4 into the closed position, against the force exerted by a torsion spring (not shown). The radial drive arm 14, which is angularly offset from the radial trailing arm 12, is provided with a drive projection 15 on the side that points in the direction of rotation α and coincides with the direction of rotation of the ratchet 4 into the closed position. On the side of the drive arm 14 that points in the direction of rotation β, coincides with the direction of rotation of the ratchet 4 into the open position, the drive arm 14 is provided with a radially rounded support surface 16 for engagement with the catch bracket 9.On the ratchet 4, for example on its arm 6b, a tightening latch 21 is pivotably mounted on the bearing journal 22. The tightening latch 21 has a radial arm 28, at the end of which a tightening projection 23 is formed. The tightening latch 21 is pivotable by the force exerted by a screw drive spring (not shown) into the engagement of the tightening projection 23 with the drive projection 15 of the radial drive arm 14 of the tightening ring 11. A guide arm 24 is formed on the tightening latch 21, which terminates in a guide projection 25. The guide projection 25 of the tightening latch 21 is in the open position of the ratchet according to [reference missing]. Fig. 1 inclined to the radial line that runs through the axis of the ratchet bolt 5 and the guide projection 25, preferably at an angle of 40°–90°. The pull-out latch 21 is also provided with a radial retaining arm 26 with a retaining projection 27, which is held in contact with the retaining projection 7 formed on the arm 6b of the ratchet 4 by the force exerted by a helical spring (not shown). To deflect the pull-out latch 21 from the engagement of the pull-out projection 23 into the path of the drive projection 15 of the pull-out ring 11, a device is housed in the housing 1, consisting of a guide element 30 with a guide surface 32 that engages with the guide projection 25 formed on the guide arm of the pull-out latch 21. The guide element 30 is designed according to Fig. 1. An example is a guide lever 33, which is pivotably mounted in the housing 1. Advantageously, the guide lever 33 is pivotable between its initial position at the stop on a support projection 34, which is fixedly connected to the housing 1, and a position that is at an angle away from the support projection 34, against the force exerted by a helical spring (not shown). The guide element can advantageously be slidably mounted in the housing 1 or be fixedly connected to the housing 1.

[0011] In the Fig. Figures 2-7, 9-10 show the motor vehicle lock in successive positions during the closing of the lock according to the invention. Fig. Figure 8 shows the motor vehicle lock in the position shown in the invention when the lock is opened.

[0012] In the Fig. Reference numerals 2-8 are the same, namely: the ratchet 4 with arm 6a and arm 6b, which is provided with a retaining projection 7; the catch bracket 9, which engages in the guide recess 10; the puller ring 11 with radial puller arm 12 and radial drive arm 14 with the drive projection 15 on one side and the support surface 16 on the other side; the puller latch 21, which is pivotably mounted on arm 6b of the ratchet 4 by means of a bearing pin 22 and is provided on one side with a retaining arm 26 and a retaining projection u for stopping on the retaining projection 7 of arm 6b and on the other side with a guide arm 24 with a guide projection u; the guide lever 33 with the guide element 30 and the guide surface 32 and finally the support projection u with the coil spring 35 for contact with the stop 36.

[0013] Fig. Figure 2 shows the position in which the catch bracket 9 engages in the guide recess 10 and is engaged with the radial arm 6b of the ratchet 4, which rotates clockwise against the force of the torsion spring and engages the follow-through latch 21, which is pivotably mounted on the arm 6b of the ratchet 4. The follow-through latch 21 engages with its guide projection 25 with the guide element 30, which is arranged on the guide lever 33. The guide projection 25 of the follow-through latch 21 is inclined to the radial axis and passes through the axis of the ratchet bolt 5 and the guide projection 25. As a result of this inclination, the guide projection 25 moves from its initial position at the stop towards the retaining projection 7 of the radial arm 6b according to Fig. 1 is deflected counterclockwise into the position of the retaining projection 27, which is away from the retaining projection 7. The trailing projection 23 is thereby deflected out of the path of the driver projection 15 of the trailing arm 14 of the trailing ring 11.

[0014] According to Fig. 3 The follower projection 25 on the guide arm 24 is in force contact, for example with its edge, with the guide surface 32 of the guide element 30 of the guide lever 33. The guide lever 33 is in contact with the support projection 34, which is fixedly mounted in the housing 1. The force contact of the guide surface 32 on the guide projection 25 of the guide arm 24 causes the follower projection 23 of the latch 21 to remain outside the path of the drive projection 15 of the radial drive arm 14 when the ratchet 4 is turned clockwise. The force contact between the guide surface 32 and the guide projection 25 of the guide arm 24 can occur over the entire length of the guide surface 32 of the guide element 30 when the catch 9 is moved during the closing of the lock. When closing the cover or door, an obstruction, e.g. B. wedge a hand or any object between the lid or door and the fixed part of the body.Practical experience allows us to determine the critical distance between the lid or door and the fixed part of the bodywork at which there is no longer a risk of the aforementioned obstacle becoming wedged between the lid or door and the fixed part of the bodywork.

[0015] Fig. Figure 4 shows an example position of the catch bar 9 when an obstacle has become wedged between the lid or door and a fixed part of the body. The movement of the catch bar 9 is stopped in the critical position and the ratchet 4 remains in the position shown. Fig. 3. The guide projection 25 is in force contact with the guide element 30, and the retraction latch 21 remains deflected from the engagement of the retraction projection 23 into the path of the drive projection 15 of the radial drive arm 14 of the retraction ring 11. Any obstruction is thus not clamped by the force acting between the cover or door and the fixed part of the body. The radial retraction arm 12 rotates, via a lever mechanism (not shown), under the influence of a force, e.g., an electric motor, into the fully retracted position without the drive projection 15 of the radial drive arm 14 engaging with the retraction projection 23 of the retraction latch 21. By a simple reverse movement of the radial retraction arm 12, the retraction ring 11 returns to the position shown. Fig. 3.

[0016] The Fig. Figure 5 shows the lock in the closing position of the catch bar 9 when there is no obstruction between the lid or door and the fixed part of the body and the distance between the lid or door and the fixed part of the body is less than the critical value. The guide projection 25 has disengaged from the guide surface 32 of the guide element 30, and the follow-up latch rotates clockwise due to a coil spring (not shown) in the direction of the engagement of the follow-up projection 23 with the drive projection 15 of the follow-up ring 11.

[0017] After Fig. 6 the trailing latch 21 with its trailing projection 23 engages with the driver projection 15 of the trailing ring 11.

[0018] After Fig. 7 The puller ring 11 with the radial puller arm 12 is rotated into the fully pulled position by the force of a lever mechanism not shown and the ratchet 4 is fully locked.

[0019] The Fig. Figure 8 shows the lock in the phase of opening the lock from the fully locked position according to Fig. 7. The radial trailing arm 12 is released by a lever mechanism (not shown) and gradually returns to the position according to the force of a torsion spring (not shown) in a counterclockwise direction. Fig. 1 back. In the position according to Fig. 8 is the follow-up latch 21, which is acted upon by the force of a torsion spring (not shown) in the stop with its retaining projection 27 on the retaining projection 7 of the radial arm 6b of the ratchet 4. The ratchet 4 rotates counterclockwise as a result of the force of a torsion spring (not shown). The radial drive arm 14 with the support surface 16 releases the catch bracket 9 into a partially secured position.

[0020] The Fig. Figure 9 shows a lock with a guide element 31, which is slidably mounted in a guide 38 within a housing 1. The guide element 31 is slidably mounted in the housing 1 between its initial position, engaged with the stop 36, which is fixed to the housing 1, and its position away from the stop 36, against the force exerted by the spring 37. The follow-up projection 25 is in force contact, for example with its edge, with the guide surface 32 of the guide element 31. The guide element 31 is arranged between the projection 36 and the guide 38, which is fixedly mounted in the housing 1. The position of the follow-up latch 21 in the Fig. 9 corresponds to the position of the trailing trap 21 in the Fig. 3.

[0021] The Fig. Figure 10 shows the lock with a guide element 29 fixedly mounted in the housing. The fixed guide element 29 is firmly connected to the wall of the housing 1 by means of a screw (not shown) and an opening 37. Also as in the Fig. 3 and Fig. 9 is the trailing projection 25 of the trailing latch 21 in force contact, for example with its edge, with the guide surface 32 of the fixed guide element 29.

[0022] The motor vehicle lock thus comprises a housing 1 with a lever-shaped latch 2, which is pivotably mounted on a latch bolt 3, engaging with a ratchet 4, which is pivotable about a ratchet bolt 5 between an open and a closed position and is provided with a coil spring 10 for bringing the ratchet 4 into the open position and with a shaped catch recess 8, which is formed between the radial arms 6a, 6b for catching the catch bar 9 of the vehicle body, wherein a power-operated follower ring 11 with a drive projection 15 is pivotably mounted coaxially with the ratchet 4, a pivotably mounted follower latch 21 with a follower projection 23 is arranged on the ratchet 4,which is pivotable into the engagement of the tightening projection 23 with the drive projection 15 of the pulling ring 11 and in the housing 1 is a device for deflecting the pulling latch 21 from the engagement of the pulling projection 23 into the path of the drive projection 15 of the pulling ring 11. Industrial applicability

[0023] The motor vehicle lock according to the invention can be used industrially as part of the vehicle body. Reference sign 1 case 2. Trap 3 trap bolts 4 ratchet 5 ratchet bolts 6a,6b radial arm 7 Retention advantage 8 Intercepting cutout 9 interceptor bars 10 Guide recess 11 Pulling wreath 12 radial trailing arm 13 Opening 14 radial drive arm 15% lead 16 support surface 21 Trailing trap 22 bearing journals 23 trailing lead 24 Guide arm 25% lead 26 Retaining arm 27 retention advantage 29 fixed guide element 30 Lever guide element 31 sliding guide element 32 guide surface 33 guide levers 34 Support projection 35 spring 36 lead 37 Opening 38 Leadership QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2004 036 654

[0003] DE 19736445

[0004]

Claims

[1] Motor vehicle lock, in particular for a body hood or a body door, comprising a housing (1) with a lever-shaped latch (2) pivotably mounted on a latch bolt (3) engaging with a ratchet (4) pivoting about a ratchet bolt (5) between the open and closed positions, the ratchet being provided with a coil spring (10) for bringing the ratchet (4) into the open position and a shaped catch recess (8) formed between radial arms (6a, 6b) for catching a catch bar (9) of the vehicle body, characterized by , that a power-operated trailing ring (11) with a drive projection (15) is pivotably mounted coaxially with the ratchet (4), a follow-up latch (21) with a follow-up projection (23) is pivotably mounted on the ratchet (4), which is pivotably engaged with the follow-up projection (23) and the drive projection (15) of the follow-up ring (11) and in the housing (1) a means for deflecting the follow-up latch (21) from the engagement of the follow-up projection (23) in the path of the driver projection (15) of the follow-up ring (11) is arranged. [2] Motor vehicle lock according to claim 1, characterized by , that the means for deflecting the trailing latch (21) from the engagement of the trailing projection (23) in the path of the driver projection (15) of the trailing ring (11) consists of a guide element (30, 31) housed in the housing (1), which is provided with a guide surface (30a, 31a) and engages with a guide projection (25) formed on the guide arm (24) of the trailing latch (21). [3] Motor vehicle lock according to claim 2, characterized by , that the guide element (30) is arranged on a guide lever (33) which is pivotably mounted in the housing (1). [4] Motor vehicle lock according to claim 3, characterized by, that the guide lever (33) is pivotable between a starting position in the stop relative to a support projection (34) fixedly connected to the housing (1) and a position angularly removed from the support projection (34) against the force of the coil spring (35). [5] Motor vehicle lock according to claim 2, characterized by , that the guide element (31) is slidably mounted in the housing (1) between a starting position in engagement with a stop (36) fixedly connected to the housing (1) and a position away from the stop (36) against the force of a spring (37). [6] Motor vehicle lock according to claim 1, characterized by , that the drive projection (15) of the puller ring (11) is arranged on one side of the radial drive arm (14) of the puller ring (11), the other opposite side of which is provided in the radial direction with a radially rounded support surface (16) for engagement with the catch bracket (9). [7] Motor vehicle lock according to claim 1, characterized by , that the pull-back latch (21) is provided with a retaining arm (26) which has an axially directed retaining projection (27) which engages with a radial retaining projection (7) formed on the ratchet (4).

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