DE3139007A1 - Device for adjusting the alignment of headlights, in particular motor vehicle headlights - Google Patents

Description

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Device for adjusting the alignment of headlights / in particular of motor vehicles

The invention relates to a device for adjusting the Alignment of headlights / in particular of motor vehicles.

The invention is based on the object of creating a device of this type / with the aid of which in a simple manner a correction or adjustment of the alignment of headlights, e.g. the low beam headlights of a motor vehicle or -wagens, is feasible so that changes in the alignment of the headlights by the vehicle driver can be compensated for, for example, from the vehicle load and the distribution of the load in the vehicle, the road condition, the tire pressure and the suspension.

This object is achieved according to the invention by an embodiment of the device according to claim 1. The device according to the invention is at the same time robust in its construction, has a high level of operational reliability and enables very precise fine adjustment of the alignment of the headlights.
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Further features and advantages of the invention emerge from the subclaims and the following description in In connection with the drawing, in which an embodiment of the subject invention is illustrated Drawing show:

Fig. 1 is a schematic function diagram of the invention Contraption-,

Fig. 2 shows the electrical circuit diagram of the invention Contraption,

Fig. 3 is a schematic plan view of the ladder

Sectors of the movable conductor track and the

moving contacts,
FIG. 4 shows a section along the line AA or BB of FIG. 3,
5 shows a longitudinal section through an exemplary embodiment

the correcting device according to FIG. 1,

6 shows a section along the line C-C of FIG. 5, 7 shows a section along the line D-D of FIGS. 5 and 8 shows a view of the two correction devices • JO for the left and right headlights of one

Motor vehicle. .

The device comprises a control button 1 which can be operated from the instrument panel 2 of the vehicle , a gear motor 3 which is provided with a reversible electric motor 4 and a gear 5, and a correcting device 6 on the housing with which the gear motor 3 is attached .is.

The control button 1 is connected to the correcting device 6 a transmission link 7, for example from a flexible cable is formed, and about a translation that is an enlargement the rotary movement of the control knob 1 allows connected.

For this purpose, the control button 1 is provided with a pinion 9 small diameter meshed with a pinion TO larger diameter forms a unit. This stands with a bevel gear 11 meshed with one end of the Transmission link 7 is connected.

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Inside the correcting device 6 is the lower end des, transmission member 7 with the worm 12 of a gear 13 connected, which meshes with a worm wheel 14 «

The output shaft 5 .. of the gearbox 5 'is also with the Inside the corrector. ' 6 or .. the screw 15 one

Gear 16 connected for this purpose with a worm wheel 17 combs.

The worm wheel 17 is connected to the headlight 18 of the motor vehicle by a threaded connection , the structure of which is explained in the following and which enables the conversion of the rotational movement of the worm wheel 17 into a straight-line movement acting on the headlight 18 at 18'- in order to change the alignment bring about the headlight by pivoting about an axis 21.

This rectilinear movement is then made possible by a threaded connection 22 converted into a rotary movement in such a way that this rotary movement as well as that of the worm wheel 14 of the gear 13 outgoing rotary movement can act on a direction or direction of rotation switch 23, which is also inside the Correcting device 6 is housed.

The switch 23 (see also FIG. 2) is a rotary switch in the example shown and consists of a conductor track 24, which is rotatable and comprises two conductor circular sectors 24 and 24 ″, from a fixed conductor track 25, which has two circular sectors 25 -, 252 and from two movable contacts 26- and 26 _? , in the example shown in the form of rollers which are mounted on a rotating support 27.

The sectors 25- and 25 _{2 of} the stationary conductor track are each connected to one of the terminals of the electric motor 4, while the conductor sectors 24- and 24_ of the movable track 24 are connected to the positive and negative terminals of a voltage source U.

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The movable track 24 is rotated by the worm wheel 14 displaced, while the support 27 of the contact rollers 26- and 26- from the thread of the part 22 coaxially in rotation is moved.

In the rest position of the switch 23, the contact rollers 26, and 262 are arranged at the level of insulating gaps 28 which separate the sectors 24 ^ and 24 _{2 of} the movable path from one another,

If the driver wishes to change the alignment of the headlights of his vehicle / he presses the control button 1 in one or the other sense of rotation, causing a rotation of the conductor track 24 and the power supply to the motor 4 from the voltage source U in one or .. • J.Q the other direction of rotation is determined.

The motor 4 supplied with current in this way changes the alignment of the headlight 18 through the gears 5 and 16 and the transmission members 16 and 20 and furthermore moves the contact rollers 26 and 26 ~ in the same direction of rotation as that of the movable track 24 _# , namely to the rollers 26 and 26 again reach the height dt * J 3 bolier column 28.

At this point in time, the correct supply of raw material to the motor 4 is interrupted and the headlight 1H Jn fixed in the new alignment, the by the control utu'hlag of the control button 1 has been determined.

In this way, position control by means of a Direction switch reached, which has a lag differential switch represents.

In addition, this development enables a high degree of Accuracy of the required setting for the headlight 18, as the control button with the correction unit 6 through the transmission member 7 is connected, which comprises the translation 1,9,1.0,11 at its end facing away from this, and there furthermore the unit of the other mechanical transmission links is arranged inside the device 6, which also has a mechanical unit with the gear motor forms =. '.'. '■

If the alignment of the two headlights of the motor vehicle or vehicle is to be adjusted at the same time, it is sufficient, starting from the same geared motor 3, to actuate a further correcting device 6 .. which also a transmission 16 and transmission members 19 and 20 comprises.

The correcting device 6 .. thus has one with the device 6 identical construction with the exception that it comprises no direction switch and no gear 13. 10

According to the invention, the accuracy in the correction is the Alignment of the headlights is also caused by a special design of the directional switch 23.

As is apparent from FIGS. 3 and 4, this is the distance between the two contact rollers 26 .. and 26 ₂ with respect to their direction of movement is substantially equal to the length of the sector 242 ^ ^he ^ ^ewe 9 ^ ^c ^ ^s strip conductor 24 so that when the rollers are in a position that corresponds to the rest position of the direction switch · "·", the rollers are each in electrical contact with one of the ends of the sector 242.

Thus, in the example shown, the switch 23 is rotatable and the length of the sector 242 ^ ^s * " ^ ^{m essential} li ^cnen equal to the circumferential spacing of the rollers 26 .. and 26 ₂ , taking into account their trajectory.

Such an arrangement allows a precise definition of it Rest position of the rollers 26 .. and 26 "to achieve the desired Alignment accuracy for the headlights and also the definition in the rest position of the direction switch an insulating distance d in such a way that electrical flashovers between one or the other of the rollers and the ladder part 24 .. are avoided.

The rollers 26 .. and 26_ are springs according to the

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Arrow P applied in the direction of the conductor track 24, while the insulating column 28 below this. Web lie / so that when aligning the rollers, the power supply to the motor is interrupted as soon as one of the rollers leaves sector 24 while the other roller is still in contact with sector 24 .. and the kinetic energy of the mechanism causes the roller that has detached from the sector continues its rotation at the level of the insulating gap 28 until it reaches the edge of the sector 24 ₂ , where it does not move in the vertical direction against the pressure P to reach the surface of the sector 24 ~ can, while at the same time the other role has in turn reached the other end of the sector 24 ~ and enters the insulating gap under the action of the pressure P, but remains in contact with this end of the sector 24 ~.

A state of equilibrium is then immediately established, as is the case between the two rollers 26 and 26 ₂ at the ends of the sector 24 ₂ , as shown in FIGS. 3 and 4. .

It should be noted that this rest position determines the insulating distance d to an extent that avoids electrical flashovers, this distance d being precisely at its minimum value due to the accuracy of the position of the rollers 20 ₁ and 26 ~ when they are stopped.

It has been stated above / that to achieve this result, the length of the sector 24 corresponds to the circumferential distance of the. Correspond rollers 26- and 26- to = This is not exactly since, as can be seen from Fig. 4, the Umfangsabstahd of the rolls by a value 2e is greater than the length of the sector 24 _2.

However, this distance depends on the Durohmesser Roles 26. and 26_ changeable / so that- you can say / that

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these distances are essentially the same under the. The prerequisite is that the result to be achieved is a position of the rollers 26 ... and 262 in which they are both in contact with the same sector 24 ~.
5

In the example shown, the direction switch is also designed as a rotary switch; however, they can be the same Results with a linear direction switch taking into account of the above design features can be achieved. 10

According to the embodiment according to FIGS. 5 to 8, the correcting device 6 is accommodated in a housing which is formed by two housing parts 30 and 31, which are combined in a connecting plane 32, so that it is possible ■ 15 the housing part 31 by a closure plate 33 (Fig. 8) in

to replace the case in which the device does not include a direction switch and is actuated by the transmission member 34 from a correcting device which is provided with the gear motor 3.
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The sectors 25 'and 252 of the fixed conductor track 25 are attached to an extension 35 of the housing part 31, while the worm wheel 14 meshing with the worm 12 is rotatably mounted around this _{extension, which the sectors 24 and 24 2 of} the movable conductor track 24, which are arranged in the same plane as the sectors 2S ₁ and 25 of the fixed conductor track 25.

The movable sectors 24 'and 24 "are on the outside of the worm wheel 14 and are in the manner of grinding shoes to two conductor tracks 36, which are provided on an inner collar of the housing part 31.

The two conductor tracks 36 have contact pins 36 at their ends, which are connected to the positive and negative terminals of the chip source U 'and thus enable a power supply to the movable sectors 24 *' and 24 _2.

Incidentally, the fixed sectors 25- and 25 " Contact pins 25 on that with the connection cycles of the motor 4 are connected.

The support part 27 of the contact rollers 26.j and 2 & ₂ forms a unit with the worm 22, with which a part 20 meshes in the form of a sleeve, the rotation of which is prevented by the square cross-section of its rear end 20- which is in a recess of the corresponding Shape of the housing part inserts.

The sleeve 20, which by the thread of its inner wall with the Thread of the screw 22 is connected, also has on its outer surface has a thread with which the internal thread of a part 19 meshes, which is a unit with the worm wheel 17 forms.

The worm wheel 17 meshes with the worm 15, which with the Output shaft of the gear motor 3 is connected.

The end 20 .. of the sleeve 20 is provided with a transverse pin 38, with which the end of a spring 39 is anchored, which is otherwise connected to a fastening part such as an angle 40 " The angle 40 is connected to a bracket of the headlight 18, to change its orientation.

This design of the correcting device leads to a compact unit with a minimum of play, so that an accurate Adjustment of the headlight by means of the angle 40 is achieved.

The displacement of the 4Q angle is achieved by rotating the

Worm wheel 17 brought about by the gear motor 3 by the rotation of the worm wheel 17 due to each other in Engagement standing thread causes the axial displacement of the sleeve 20 and thus the displacement of the angle 40 =

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The axial displacement of the sleeve 20 also leads, because of the mutually engaged threads, to a rotation of the worm 22 and thus of the support 27 with which it forms a unit.
5

The rotation of the support 27 causes a rotation of the rollers 26 .. and 262, which by the springs 37 against the fixed and movable conductor tracks 25 and 24 are pressed.

The direction of rotation of the rollers 26 .. and 262 is such that they takes place in the same sense as the initial rotation of the worm wheel 17, the rotation of the rollers 26 .. and 26 “continues until, as already described, the height the insulating gap 28 reach.

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Claims (10)

Claims; · Device for adjusting the alignment of headlights, in particular of motor vehicles, characterized in that it comprises a control button (1), an electric motor (3) which can be switched in direction of rotation and a direction switch (23) connected by mechanical transmission to a headlight (18) for its alignment , which has a movable conductor track (24) with at least two of two insulating gaps (28) separated Loit-ersektoren (24 ^ _r 24 ₂ ) and two each adjacent to a sector movable contacts that of the sectors on the one hand and the contacts on the other hand are connected to the KJwliunßn of the motor and the others to the terminals of a voltage source and that one of the control button and the headlight is connected to the movable conductor track and the other to the contacts included via mechanical transmission elements, such that by means of a movement of the conductor track or the contacts of the direction switch when operating the control button excites the motor and aligns the headlight in a sense corresponding to the movement of the contacts or the conductor track until the motor is interrupted by contacting the contacts at the level of the insulating gap. 2. Device according to claim 1, characterized in that that the distance between the two movable contacts (26. ,, 26.) with respect to their direction of movement is essentially Ί ^ y U U 7 equal to the length of one sector (24_) of the movable one Conductor track (24) is such that the two contacts in one of their positions each in electrical contact with a the ends of the sector.
5 3. Apparatus according to claim 1 or 2, characterized in that the sectors (24 .., 24) of the movable conductor track (24) separating insulating gaps (28) occupy a different level than the sectors. 4. Device according to one of claims 1 to 3, characterized characterized in that between the movable contacts and their support springs for an abutment of the contacts on the movable conductor track (24) are arranged. 5. Device.nach one of claims 1 to 4, characterized characterized in that the mechanical transmission links each have a worm gear, wherein the worm wheels (14,17) are arranged coaxially and one of the worm wheels with the movable conductor track (24) is provided, while the other is connected to the contacts (26. »26 ~). 6. Apparatus according to claim 5, characterized in that the connection of the worm wheels (14,17) with the contacts (26 .., 26 " ) comprises a movable in the axial direction, but fixed relative to a rotational movement part (20), which with the headlight (.18) is connected and two threads au £ - which are in engagement with two corresponding threads, one of which on the worm wheel and the other on the support part of the contacts (26 .. r26_.) or the movable conductor track (24) is provided. 7. Apparatus according to claim 6, 'characterized in that the headlight (18) connected in the axial direction movable part, formed by a sleeve {20) which is on on their inner surface and on their outer surface, respectively one of the threads is provided. 8. Device according to one of claims 5 to 7, characterized in that the one connected to the control button (1) mechanical transmission comprises a translation between the control head and the worm gear, 9. Device according to one of claims 1 to 8, characterized characterized in that the worm gear (13,16) as well the direction switch (23-) in one of the direction of rotation switchable Motor (4) supporting housing are arranged. 10. Device according to one of claims 5 to 9, characterized in that the movable contacts. (26 _n , 26 ~) are connected to the terminals of the motor (4) or the terminals of the voltage source by a fixed conductor track (25) with at least two sectors (25 ^,, ? R>, J and the fixed 1 * Conductor track arranged in the movable conductor track (24) is supported by the worm wheel of one of the gears is.