DE2912141A1 - DRIVE FOR ADJUSTING A LINK, ESPECIALLY A COMPONENT PART OF A MOTOR VEHICLE - Google Patents

Description

2912U1

R. 5381
February 26, 1979 Sat / Sm

RO BERT BOSCH GM BH, 7OOO Stuttgart 1

Drive for adjusting a member, in particular a component belonging to a motor vehicle

State of the art

The invention is based on a drive according to the preamble of the main claim. It is already a central locking device known for vehicle doors whose drive motor drives a threaded spindle on which a so-called Traveling nut is arranged, which is shifted in one direction or the other depending on the direction of rotation of the drive motor will. A stud bolt connected to the traveling nut lies in a slot of a pivoted one Double lever that is pivoted by the wandering nut. The slot is in the end area of one lever arm

0300A1 / 0151 " ^{/ 2}

2912U1

- 2 - R.5381

Sat / Sm

of the double lever arranged and the other lever arm isb operatively connected to the door lock. To ensure sufficient pivoting movement of the lever arm acting on the door lock to achieve, the path of the mother must be chosen very large, so that the known device is very space-consuming builds. The difficulties in installing this device are considerable, because precisely in vehicle doors In the headlight area and also in the engine compartment of motor vehicles, the space for installing such actuators is extremely limited on a regular basis.

Advantages of the invention

The drive according to the invention with the characteristic. Features The main claim has the advantage that / is very compact, so that it can be used in a variety of ways result.

Another advantage is that such a drive works reliably and with the respective requirements is easy to customize.

The measures listed in the subclaims are advantageous developments and improvements of the in the main claim specified actuator possible.

drawing

An embodiment of the Eilinden is in the drawing and explained in more detail in the following description. FIG. 1 shows a schematic representation an actuator belonging to a locking mechanism

../3 030041/0151

R-5381

Sat / Sm

in view, with the locking mechanism open and the actuator being prepared for closing, FIG. 2 a section through the actuator according to Figure 1 along the line II-II, Figure 3 according to the actuator FIG. 1 during the closing movement and FIG. 4 the actuator according to FIG. 1 during the opening movement.

Description of the embodiment

An actuator 10 shown in FIG. 1 has an electric drive motor 12, the armature shaft of which is designed as a worm gear 14. The feed screw 14 meshes with a worm wheel 16 which is mounted in a gear housing 20 via a bearing journal 18. As FIG. 2 shows, the bottom 22 of the gear housing 20 is penetrated by three sliding contacts 24 which work together with a switching disk 26 which is arranged on the end face 28 of the worm wheel 16 facing the housing bottom 22. The sliding contacts 24 and the switching disk 26 are arranged in the working circuit of the electric drive motor 12. The design of the switching disk 26 is such that, in cooperation with the sliding contacts 24, it controls the motor so that after the electric motor is switched on, the worm wheel 16 is rotated by 180 ° and the drive motor 12 is then switched off. The drive motor 12 can also be switched in its direction of rotation. If the electric motor is operated in the other direction of rotation, it is also switched off when the worm wheel 16 has performed a rotation angle of 180 °. The worm wheel 16 thus performs a pendulum movement during operation, it comes to a standstill in its two end positions, from which it can only be moved by turning on the electric motor via an operating switch.

0300A1 / 0151

.Jk

2912U1

I - 4 - R. 5381

Π Sat / Sm

ß The actuator also includes a gearbox for

0 setting movement 30 and one with the gear 30 effective

) < connected push rod 32, which acts on a locking mechanism

1 nism 34 acts, which belongs to a cover element,

I which is assigned to an opening in a vehicle body is arranged. Such cover elements are for example

I wise through motor vehicle doors, the hood of one

I motor vehicle, the trunk lid or by a

I - flap formed covering a in a Karosserieniesche \ disposed fuel filler ^f.

The gear for intermittent movement 30 is also accommodated in the gear housing 20. The gear for intermittent movement 30 includes a stop pin 36 which protrudes from the end face 38 of the worm wheel 16, which faces away from the switching disk 26. V For overall: gear for intermittent movement 30 belongs on one arm

■ (■■ 'ι

% 40, which acts as a two-armed lever around a fixed

j) the housing base 22 connected bolt 42 is pivotable.

| j The one lever arm 44 extends in a manner shown in FIG

• I shown center position to the bearing pin 18 of the

Worm wheel 16 and thus engages in a circular path 46 which, when it comprises from its dash-dot line in Figure 1 illustrated end position to its other, in Figure 1 illustrated end position moves a traveled by the stop bolt 36th The cylinder wall regions of the bolt 36 cooperating with one lever arm 44 of the arm 40 form stop surfaces 48 and 50 through which the one lever arm 44 of the arm 40 is pivoted to one side or the other while pivoting about the bolt. This pendulum movement is of course also shared by the other lever arm 52 , which, in relation to the 3 bolts 42, is located on the one opposite the one lever arm 44

Il side extends. With respect to the housing base 22 is over

Il 030041/0151

- 5 - R- 5381

Sat / Sm

a one-armed intermediate lever 54 is pivotably mounted on the arm 40 on the bolt 42. The intermediate lever 54 extends essentially to the side in which the other lever arm 52 of the arm 40 also points. The intermediate lever 54, like the arm 40, is penetrated by the bolt 42 and on this, together with the arm 40, is secured against axial loosening by a locking washer 56. The free end 58 of the intermediate lever 54 is fork-shaped and accordingly has two prongs 60 and 62 arranged at a distance from one another. Between the two prongs 60 and 62 of the intermediate lever 54 there is a driving pin 64 which is firmly connected to the push rod 32. The push rod 32 is operatively connected to the buckle locking element 66 which, together with a lock latch 63, forms the locking mechanism 34. When the actuator is connected to the cover element, the lock latch 68 is mounted fixed to the frame. However, it is also conceivable to attach the actuator fixed to the frame and to connect the lock latch 68 to the cover element. The recess 70 in the free end area 58 of the intermediate lever 54 is designed so that the intermediate lever 54 can be pivoted from its one end position shown in FIG. 1 into its other end position, which is shown in phantom in FIG. The arm 40 and the intermediate lever 54 are within certain limits independently of one another and can be pivoted freely on the bolt 42 with respect to one another. In operation of the device, however, the pivoting of the intermediate lever 54 is effected by the arm 40 . For this purpose, the other lever arm 54 of the arm 40 has two raised tabs 72 and 74 arranged at a distance from one another (see in particular FIG. 2), which protrude into the pivot plane of the intermediate lever 54 and form drivers that cooperate with the intermediate lever 54. The distance between the facing cheeks 76 and 78 of the tabs 72 and 74 is greater than the width of the intermediate lever 54. The intermediate lever 54 is also arranged so that

030041/0151 ../6

• - 2912U1

- 6 - R. 5 81

Sa / Cm

that it is located between the two cheeks 76 and 78 of the tabs 72 and 74. If the actuator except Is in operation, the arm 40 is always in the central position shown in FIG. To do this, grab the a lever arm 44 on its two opposite side surfaces pointing in the pivoting direction Leaf springs 82 and 83, which are connected to the transmission housing 20 via supports 84. The leaf springs 82 and 83 are biased and matched to one another in such a way that when the actuator is switched off, they move the arm 40 in hold its central position shown in Figure 1. The side surfaces 80 form counter shoulders, which with the stop areas 48 and 50 of the stop bolt 36 work together.

The actuator described works as follows:

When the locking mechanism 34 is to be brought from the unlocked position shown in FIG. 1 into its locking position, the electric motor is switched on, the working current circuit being prepared via known electrical switching elements in such a way that the worm wheel 46 rotates in the direction of the arrow 86 (FIG. 1) . After a certain angle of rotation of the worm wheel l6 of the stop bolt 36 strikes with its stop region 48 at the one side surface 80 of a lever arm 44, and takes this by overcoming the increasing reaction force of the leaf spring 83. With the pivoting of one lever arm 44 , the other lever arm 52 is also pivoted and the flap 74 takes along with its cheek 78 the intermediate lever 54, which forms an output member of the actuator 10, as it were. The arm 44 is pivoted by the stop bolt 36 until the stop bolt 36 reaches its position shown in FIG

030041/0151 " ⁿ

- 7 - R. 5381 I.

Sa / Sm | f

and the one lever arm 44 of the arm 40 releases. In | j

In this position, the intermediate lever 54 has been pivoted from its first reversal position shown in Figure 1 into its second reversal position shown in Figure 1, with its prongs 62 via the driving pin 64, the push rod 32 forming an element for transmitting the movement as far in the direction of the arrow 65 (FIG. 3) has shifted, so that the driver pin 64 is in the position shown in phantom in FIG. In this position, the control element 66 of the locking mechanism 34 has reached the lock latch 68 and thus into its locking position. When the stop bolt 36 or its stop area 48 releases one lever 44 of the arm 40, the leaf spring 82 is largely relaxed, while the other leaf spring 83 has reached its maximum tension (FIG. 3) act on the one lever arm 44 and press the arm 40 back into its central position shown in FIG. 1, the other leaf spring 82 acting as a counter bearing. However, only the arm 40 is adjusted by this resetting. The intermediate lever 54 is not pivoted because the distance between the two cheeks 76 and 78 of the tabs 72 and 74 has been designed accordingly. The worm wheel 16, however, runs into its one end position, shown in phantom in FIG. 1. In the locking position, the stop pin 36 belonging to the gear mechanism for intermittent movement 30 is in the position shown in phantom in FIG. In order to open the locking mechanism 34 again , the electric motor 12 must be switched on again. The working circuit for the electric motor 12 has been prepared by known switching means in such a way that the worm wheel 16 now rotates in the direction of the dash-dotted arrow 88 in FIG. After a

030041/0151 - ^{/ 8}

· ■■ '··· ·· ■ "·· * ^: ■■' 2912H1

- 8 - R. 5381

Sat / Sm

At a certain angle of rotation of the worm wheel l6 at which there is no change in the locking mechanism 34, the stop pin 36 again runs with its stop area against the arm 40 located in its central position or against its one lever arm 44 and pushes it out of the central position in the direction of the arrow ( Figure 4). At the same time, of course, the other lever arm 52 of the arm 40 is also pivoted, the cheek of the tab 72 pivoting the intermediate lever 54 from its position shown in phantom (FIG of arrow 90 and the unlocking movement for the locking mechanism 34 is initiated. The pivoting of the arm 40 now takes place in such a way that the tension of the leaf spring 82 increases, while the leaf spring 83 relaxes increasingly. When the gear for intermittent movement 30 has reached its position shown in FIG. 4, the stop bolt runs out of the pivoting range of one lever arm 44 and thus releases arm 40. In this position, the locking mechanism 34 is completely unlocked again and the position shown in FIG. 1 is reached. The stop bolt 36 still runs into its end position shown in FIG. 1, and the now strongly tensioned leaf spring 82 returns the arm 40 to its central position without the intermediate lever 54 being moved out of its reverse position.

In the areas where the one lever arm 44 interacts with the stop bolt 36, the side surfaces of the one lever arm 44 are designed so that sliding curves 93 and 94 result, which act as counter shoulders with the stop areas 48 and 50 of the stop

../9 030041/0151

- 9 - R-5381

Sat / Sm

bolt 36 work together. The sliding cams 92 and 94 are designed so that the intermediate lever 54 or the push rod 32 executes the stroke 96 required for the unlocking movement or for the locking movement. From the above it can be seen that the drive motor 12 is followed by a worm gear I ¹ I, 16 which acts on a gear 30 for intermittent movement. Furthermore, the gearbox for intermittent movement 30 converts the rotational motor movement into a pivoting movement which acts on the component 66 to be adjusted through the intermediate lever 54 acting as an output member.

The decoupling between the arm 40 and the intermediate lever achieved over a certain pivot angle and / or through the decoupling between the stop bolt 36 and the one lever arm 44 is achieved that the Locking mechanism 34 can also be operated by hand if electrical operation is not possible or not is desirable.

030041/0181

Claims (1)

2912U1 R. February 26, 1979 Sat / Sm ROBERT BOSCH GMBH, 7OOO Stuttgart 1 Expectations 1) Drive for adjusting a member, in particular a component belonging to a motor vehicle, such as a locking element belonging to the closing mechanism of a cover element assigned to a body opening, a throttle valve, a headlight or the like, with a drive motor and with means for converting the motor rotational movement into a pivoting movement of the operatively connected to be adjusted member driven member, characterized in that a gear for intermittent movement (30) is arranged between the drive motor (12) and the output element (5 ¹ O. 030041/0151 R. 5381 Sat / Sm 2. Drive according to claim 1, characterized in that the transmission (30) has a stop (36) which is movable at least on part of a circular path and which pivots an arm (HO) which is operatively connected to the member (66) to be adjusted. 3. Drive according to claim 2, characterized in that the arm (HO) is designed as a two-armed lever (M and 52), one lever arm (HH) of which cooperates with the stop (36) and the other lever arm (52) is operatively connected to the member (66) to be adjusted. H. Drive according to Claim 3, characterized in that an intermediate lever (5H) is preferably arranged on a pin (H2) forming the pivot axis for the two-armed lever (HH, 52) so as to be pivotable in a plane parallel to the pivot plane of the arm (40), wherein the intermediate ^{lever (5 1} O extends essentially in the direction of the other lever arm (52) and that the other lever arm (52) has at least one driver (72 or 7 * 1) which cooperates with a shoulder of the intermediate lever. 030041/0151 • ■ · · - 3 - R. 5381 Sat / Sm 5. Drive according to claim ¹ J, characterized in that the intermediate lever is fork-shaped at its free end (58) and that there is a driver (6H) between the two prongs (60, 62) of the fork, which with one with the to be adjusted member (66) operatively connected transmission element (32) is firmly connected. 6. Drive according to one of claims H or 5 «in which the drive motor is reversible in direction of rotation, characterized in that the two stop areas (^ 8 and 50) having stop (36) executes a pivot angle of less than 360 °, preferably l80 ° and that one lever arm (HH) has two counter shoulders (80) which cooperate with the stop areas (HB and 50) of the stop (36). 7 · drive according to claim 6, characterized in that the other lever arm (52) as entraining two with spaced cheeks (76, 78) which project (5 ¹ O in the pivotal plane of the intermediate lever, that the intermediate lever (5 ¹ O is arranged between the two cheeks (76, 78) and that the extent of the intermediate lever (5 ¹ O measured in the pivoting direction) is smaller than the distance between the cheeks (76, 78). ../U 030041/0161 2912H1 - 4 - R. 5381 Sat / Sm 11. Drive according to one of claims 9 or 10, characterized in that the one lever arm (44) at its: ¹ , with the stop (36) cooperating, free end for each pivoting direction a coordinated to the respective end position sliding curve (92 or 94). 12. Drive according to one of claims 2 to 10, characterized in that between the drive motor (12) and 030041/01 BI .. _{/ 5} 8. Drive according to claim 7, characterized in that the size of the distance between the two cheeks (76, 78) allows a return of the arm (40) from any end position to a central position without the Intermediate lever (54) comes out of its end position reached. 9. Drive according to claim 8, characterized in that the pivoting of the arm (40) from its central position in its two end positions takes place against a restoring force. \ 10. Drive according to claim 9 » characterized in that ₍ the arm (40) in its central position at its in ^ Swivel direction opposite sides (80) | is acted upon by the force of a pretensioned spring element j '(82; 83). f - 5 - R. 5381 Sat / Sm a worm gear (14, 16) is arranged in the gear for intermittent movement (30). 13. Drive according to claim 12, characterized in that?: That an end face (38) of the worm wheel (l6) the j /; Has stop (36) for the arm (40). ί; ί l4. Drive according to claim 13 »characterized in that H that preferably on the from the stop (36) ■ J turned face (28) of the worm wheel (16) a J; | switching disk interacting with sliding contacts (24) V (26) to influence the angle of rotation of the screw ■ y rades (l6) is arranged and that the switching disc (26) φ and the sliding contacts (24) in the working circuit of the Drive motor (12) lie. 030041/0161