JPH0217371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the case of a change in the vehicle body suspension, the present invention provides
An electric adjustment device for automobile headlights that steplessly turns a headlight reflector to a position where the anti-glare beam does not exceed a predetermined reach distance, the adjustment device comprising: The motor is equipped with an electric motor installed in the casing of the motor, which drives a reduction gear, and the reduction gear has a worm, which drives a gear, and whose rotational motion is It is transmitted via a screw guided in the aforementioned casing to a longitudinally sliding push rod, which relates to an automatic adjustment device that is connected to the headlamp reflector.

Although various electric regulating devices have already been proposed for stepless or continuous control or adjustment of the reach, no practical solution has been proposed. In particular, the problem of automatic braking of the device and the problem of wear resistance have not yet been solved. This is because the two factors mentioned above are absolutely necessary prerequisites in order for the device to function satisfactorily within the predetermined tolerances over the entire operating time of the vehicle.

The present invention aims to solve this problem, and according to the present invention, the gear has a precision male thread that can be screwed into a precision female thread of the casing, and It is connected to the push rod by form-fitting in the axial direction so that it rotates while entraining the rod, and at this time, the push rod slides non-rotatably in the longitudinal direction within the casing due to the connection of a pair of form-fitting surfaces. Solved as possible.

According to such an adjustment device for a motor vehicle headlamp according to the present invention (section 1), a completely effective automatic control of the gearing is achieved, so that external forces acting on the gearing can be controlled in extremely unfavorable conditions. But it doesn't move the gears. The axial force acting from the outside is
Being conducted into the casing of the adjusting device via the push rod and its precision thread, this force has no detrimental effect on the gearing behind the push rod. Moreover, despite the relatively small size of the electric motor, the resulting adjustment forces are very high. This is because a high deceleration is achieved via the worm and the large gear wheel driven by this worm, and the conversion into an axial adjusting movement takes place under deceleration by a precision screw. The headlamp can thus be adjusted very precisely, without forces acting in opposite directions having a detrimental effect on the adjustment result.

Furthermore, according to the invention, the push rod consists of two parts, namely an adjusting shaft with an external thread and an adjusting sleeve with an internal thread, the adjusting shaft and the adjusting sleeve cooperating and being configured as a screw. The adjusting shaft is rotatable together with the gearwheel and is axially stopped, and the adjusting sleeve is slidable in the housing of the electric adjusting device and is mounted against rotation.

According to the vehicle headlamp adjustment device of the present invention (Section 2), the basic reflector adjustment device can be easily manually adjusted from the rear side of the device.

An electric adjustment device for automobile headlights that can be swiveled steplessly for the headlight reflector anti-glare beam to a position such that the anti-glare beam does not exceed a predetermined reach distance in the case of a change in the vehicle suspension. And,
The adjusting device has an electric motor installed in the casing, which drives a gearing, which has a worm, which drives a worm wheel, and which drives a gearing. The rotational movement is transmitted via a screw guided in the casing to a longitudinally sliding push rod, which is connected to the headlamp reflector, and the worm wheel is inserted into the precision internal thread of the casing. It has a precision male screw that can be screwed, and is connected to the push rod in the axial direction by shape coupling so that it rotates while accompanying the push rod.At this time, the push rod is connected to the push rod as a pair within the casing. In an electric adjusting device for a motor vehicle headlamp, which is non-rotatably slidable in the longitudinal direction by means of a positive-locking surface connection, the push rod has a threaded pin, and the worm wheel has a threaded sleeve cooperating with the threaded pin. , the thread of the threaded pin and the threaded sleeve cooperates with the external thread of the worm wheel,
The device of the invention (section 3), which is oriented in the opposite direction with respect to the internal thread of the base body, allows the push rod to be installed at a low technical cost without changing or replenishing the electrical control device. This has the advantage that the amount of displacement can be increased. At this time, it is based on the technical idea of utilizing the added leads of two screws in opposite directions.

Next, the present invention will be explained in detail using illustrated embodiments.

The housing 9 of the electric adjustment device 10 illustrated in FIG.
The electric adjustment device 10 is fixed to a fixed support frame 11 of
The connecting member 14, which reciprocates, is connected to the frame 1.
It is linked and connected to a headlamp reflector 16 via 5. The optical axis of the reflector 16 is at the terminal position 18
or so that it can take the 18' position,
The frame 15 can be pivoted steplessly or continuously around the joint 17 by means of the adjusting device 10.

The transmitter element 20 is fastened to the bodywork 21 of the motor vehicle, which is only partially illustrated, and the detector 22 of the transmitter element 20 is force-coupled to a rocker 23 supporting the rear wheel 24 . Lead wires 26, 27, 2
8 connects the adjustment device 10 to another device, the transmitter element 2
0 or a connector 25 for connection to a vehicle-mounted power source (not shown).

The electric adjusting device 10 in FIG. 2 has a gear 30 driven by a worm 31, the gear 30 is configured as a precision screw, and has an external thread 32 formed in the boss of the gear 30. The thread 32 cooperates with a similar internal thread 33 in the casing base body 34.
Furthermore, the gear 30 meshed with the worm has a shoulder 35 and another boss 36 following this shoulder 35, and this boss 36 has a plurality of locking pawls facing each other. A locking device 3 consisting of
7.

A push rod 38 (coaxially passing through the boss 36) having sections of various diameters is connected to the locking device 3.
7 engages an annular groove 39 and a flange 40 with which an axially acting disc 41 separates from the shoulder 35 and furthermore a section 42 . The jacket of the part 42 has a flattened surface 43 which cooperates with the opposite surface of the basic body 34, which is located behind it and is not visible in the figure. Further, inside the portion 42, there is a female thread 4 on the end surface.
4 is provided, into which the connecting member 14, which is connected to the reflector 16 of FIG. 1, is screwed.

The so-called actual value transmitter of the range adjusting device essentially consists of a fixed induction coil 45 and an inductance-controlling core plunger 46 which can be slid axially inside this induction coil, the plunger 46 having a It is constructed as a steel sleeve and surrounds the boss 36 of the worm-driven gear 30 and the locking device 37. Sleeve-shaped bobbin 47 supporting induction coil 45
is inserted into a receiving sleeve 48 , which can be engaged with a plate 50 on the side opposite the sleeve-like bobbin 47 by means of a stop 49 , which plate 50 projects from the basic body 34 . It is fixed to a plurality of spacer pins 51.

One end 53 of the cylindrical bellows 52 is fixed in the base 34 by a latch, and the other end 54 is attached to the push rod 3.
It is fixed in the groove 55 of No. 8 by a latch.

The base body 34 has a bayonet stop 57 for fixing the base body 34 to the support frame 11, with a corrugation disc 58 imparting elasticity to the stop. The pot-like lid 56 is hermetically fixed to the base body 34 via a packing ring 60, and the base body 34 and the lid 56 substantially constitute a dust-proof protective casing against the outside air.

The electric adjusting device according to FIG. 3 additionally has an adjusting device for the basic adjustment of the headlight in the vertical direction and differs from the previously described device in the following way.

The push rod is composed of two parts: an adjustment shaft 62 and an adjustment sleeve 63. The adjustment shaft 62 is
It has a portion 64 with an external thread 65 and a blind threaded hole 66 at the end. In the adjusting sleeve there is provided an internal thread 67 for receiving the part 64, an inner annular projection 68 adjoining the internal thread 67 and a blind hole 69 with a partially internal thread. ing. Furthermore, the outer covering is also the base body 34.
It has a flattened surface 43 which cooperates with the opposing surface which is not visible in the figure. The screw shaft of the headed screw 71 is screwed into the screw blind hole 66 of the adjustment shaft 62,
At that time, the distance between the screw head 72 and the inner ring 68 is
The adjustment sleeve 63 is selected so that it cannot be removed from the adjustment shaft 62 unless it is intentionally removed.

The adjustment shaft 62 has an end 7 protruding from the lid 76.
3, and a manual wheel 74 is fixedly mounted on the end 73. At this time, the annular edge 77 of the manual wheel 74 grips the collar 75 of the lid 76 from behind. At that time, the O-ring 78
4 and the collar 75 of the casing lid 76 is sealed.

FIG. 4 shows a small electric motor 80 fixed to the base body 34 of the casing of the adjusting device 10, and a pinion 80 is attached to the shaft end of the small electric motor 80.
1 is installed. The pinion 81 meshes with a spur gear 82 formed from the same material as the worm 31 of FIG. A total of four spacer pins 51 project from the basic body 34, each spacer pin having a pin 79 which is tapered. The plate 50, which is fastened to the spacer pin 51, is constructed as a printed circuit board, on which the electrical-electronic components of the adjustment device and, if necessary, the entire illumination distance adjustment device are arranged. The electrical terminals of the printed wiring board 50 are configured as round guide pins 83 , a packing plate 84 surrounds the round guide pins 83 protruding from the casing lid 56 , and an annular projection 85 of the lid 56 is configured as a round guide pin 83 . is pressed against the printed wiring board 50 to seal the internal space 86 from the outside air.

Next, the function of the electric adjustment device shown in FIG. 2 will be explained.

First, the gear 3 driven by the worm 31
0 and the push rod 38 is in one of its end positions, for example on the right as shown. For example, if the electric motor 80 of FIG. 4 is supplied with a corresponding signal via the transmitter element 20 of FIG. Gear device 81, 82, 31
, thereby moving from the basic body 34 towards the interior space 86 . As a result, the push rod 38 is carried along in the axial direction, with the flattened surface 43 preventing rotation. Connecting member 14 fixed to push rod 38
This causes a forward movement of the frame 15 and the reflector 16 of the headlamp according to FIG. 1, and correspondingly swivels the headlamp.

When the reflector reaches a pivot position corresponding to the new suspension of the vehicle body, the electric motor 80 is switched off. In this case, the swivel position is essentially determined by a setpoint-actual value comparison.

Next, additional adjustment of the basic headlamp adjustment device will be explained using FIG. 3.

If it is necessary to adjust the vertical basic adjustment device of the headlight, the manual wheel 74 is rotated in the corresponding direction of the double arrow 88. At this time, if the gear 30 driven by the worm is locked, the adjustment shaft 62
rotate together. By doing so, the adjustment sleeve 63 is prevented from rotating.
The frame 15 is adjusted in one of the two directions and is therefore connected to the reflector 16.
pivots in the manner described above via the connecting member 14 of FIG.

The electric adjustment device 101 in FIG.
The worm wheel 130 has an external thread 32 configured as a precision thread, the external thread 32 being configured as a precision thread.
cooperates with a similar internal thread 33 of the base body 34. Wormwheel 130 has a shoulder 35 and a threaded sleeve 136.

The push rod 38 has sections of various diameters.
It has a threaded pin 100, a flange 40 and a section 42, the flange 40 being separated from the shoulder 35 by an axially acting disc 41, the jacket of the section 42 having a flattened surface 43. and flattened surface 43
is not visible in the diagram, but is located after the
It cooperates with the opposing surface of the base body 34. Additionally, portion 42
A blind hole is provided in the end face with an internal thread 44, into which the connecting member 14 connected to the reflector 16 of FIG. 1 is screwed.

The wormwheel 130 has a threaded sleeve 136 that cooperates with the threaded pin 100 of the push rod 138. At that time, the pin 100 and the sleeve 136
The screw with is the male screw 3 of the worm wheel 130.
2 and the internal thread 33 of the base body 34 cooperating with this external thread 32. That is, if the thread direction between the pin 100 and the sleeve 136 is counterclockwise (clockwise), the thread direction between the male thread 32 and the female thread 33 must be clockwise (counterclockwise).

The regulating device operates in part as follows.

When the worm wheel 130 acts by a corresponding amount of displacement from the base body 34 based on the leads of the male thread 32 and the female thread 33, the pin 100 and the sleeve 136 are threaded in opposite directions based on the leads, and the push rod 38 is additionally displaced. Therefore, both displacements are summed and a relatively large pivoting of the reflector is obtained even if the pulse of the emitter remains unchanged.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic arrangement of an electric illumination range adjustment device for an automobile headlamp according to the present invention, and FIG.
FIG. 3 shows a full-scale axial sectional view of an electric adjustment device for the illumination range according to the invention; FIG. 4 is a side view of the basic body of the electric adjusting device of FIG. 2, and a lateral sectional view of the lid in the area of the electrical terminals; FIG. FIG. 1 is a full-scale axial sectional view of an electric adjustment device for a motor vehicle headlamp according to the US Pat. 10...Electric adjustment device, 14...Connection member, 1
6... Reflector, 20... Transmitter element, 21...
...Vehicle body, 22...Detector, 30...Gear, 31...
...Worm, 32,65...Male thread, 33,4
4,67...Female thread, 34,56,76...Casing, 35...Shoulder, 36...Boss, 37...
Locking device, 38... push rod, 39... annular groove, 4
0...Flange, 41...Disc, 43...Flattened surface, 45...Induction coil, 46...Steel sleeve, 47...Sleeve-shaped bobbin, 48...
Receiving sleeve, 50... Conductor plate, 51... Spacer pin, 52... Cylindrical bellows, 60... Sealing ring, 62... Adjustment shaft, 63... Adjustment sleeve, 6
8... Inner annular projection, 71... Head screw, 72...
Screw head, 80...Small electric motor, 81...Pinion, 82...Spur gear, 83...Round guide pin, 8
4... Sealing panel 100... Screw pin, 136... Screw sleeve.

Claims (1)

[Claims] 1. In the case of a change in the vehicle body suspension, the anti-glare beam is placed in a position such that it does not exceed a predetermined reach,
An electric motor vehicle headlamp adjustment device for steplessly rotating a headlamp reflector for an anti-glare beam, comprising an electric motor 80 disposed within a casing 34; 56 of the adjustment device. , the electric motor drives a reduction gearing device 81, 82, 31, 30, the reduction gearing device has a worm 31, the worm drives a gearwheel 30, the rotary movement of the gearwheel is transmitted into the casing. In an electric adjustment device for a motor vehicle headlamp, the transmission is transmitted via guided screws 32, 33 to a longitudinally sliding push rod 38, which push rod is connected to the headlamp reflector 16.
The gear 30 has a precision male thread 32 that can be screwed into a precision female thread 33 of the casing, and is shape-coupled with the push rod 38 in the axial direction so as to rotate while entraining the push rod 38. for an automobile headlamp, wherein the push rod is non-rotatably slidable in the longitudinal direction within the casing by a pair of form-locking surfaces 43 and 34. Electric adjustment device. 2. In the case of changes to the vehicle suspension, the anti-glare beam should be placed in a position that does not exceed the specified range.
An electric motor vehicle headlamp adjustment device for steplessly rotating a headlamp reflector for an anti-glare beam, comprising an electric motor disposed within a casing 34, 76 of the adjustment device, The electric motor drives a reduction gearing, the reduction gearing has a worm, the worm drives a gear, the rotary movement of which is longitudinally driven through a screw guided in the casing. In an electric motor vehicle headlamp adjustment device in which the transmission is transmitted to sliding push rods 62, 63, which are connected to the headlamp reflector 16, the gear can be screwed into the precision internal thread of the casing. It has a precision male thread and a push rod 6.
The push rods 62 and 63 are connected in the axial direction by form-fitting so as to rotate while entraining the push rods 43 and 63, and in this case, the push rods are connected to the pair of form-fitting surfaces 43 and 34 within the casing. The push rod is non-rotatably slidable in the longitudinal direction due to the connection of the push rod with two parts: an adjusting shaft 62 with an external thread 65 and an adjusting sleeve 63 with an internal thread 67.
The adjusting shaft 62 and the adjusting sleeve 63 cooperate and are configured as a screw, the adjusting shaft 62 is rotatable together with a gear and is fixed in the axial direction, and the adjusting sleeve 63 is configured as a screw. An electric adjustment device for a headlamp of a motor vehicle, characterized in that it is slidable and non-rotatably supported in a casing of the electric adjustment device. 3. In the case of changes to the vehicle suspension, the anti-glare beam should be positioned so that it does not exceed the specified range.
An electric motor vehicle headlamp adjustment device for steplessly rotating a headlamp reflector for an anti-glare beam, comprising an electric motor disposed within a casing of the adjustment device; It drives a gearing device, which has a worm 31, which drives a wormwheel, the rotary movement of which is longitudinally controlled via screws 32, 33 guided in said casing. The transmission is transmitted to a sliding push rod, which is connected to the headlight reflector 16, and the worm wheel has a precision external thread 32 that can be screwed into a precision internal thread 33 of the casing; and is connected to the push rod in the axial direction by form-fitting so as to rotate while entraining the push rod;
3 and 34, the push rod 138 has a threaded pin 100, and the worm wheel 130 is connected to the threaded pin 100. having a cooperating threaded sleeve 136, the thread between the threaded pin 100 and the threaded sleeve 136;
A male thread 32 of the worm wheel 130 and a female thread 33 of the base body 34 cooperating with the male thread 32.
An electric adjustment device for an automobile headlamp, characterized in that it is oriented in the opposite direction.