Car lamp steering driving mechanism
Technical field
The utility model relates to a kind of device that is used for vehicle, and specifically, the utility model relates to a kind ofly can for example, by rotating one or more car lights, change the device of the direction of illumination of these car lights according to the motoring condition of vehicle.
Background technology
Self-adaptive headlamp system (Adaptive front-lighting System is called for short " AFS ") is a kind of Vehicular illumination system that can adjust the car light irradiation direction according to the motoring condition of automobile, its objective is in order to improve the safety of night driving.The general motoring condition (for example speed of a motor vehicle, emergency brake, startup, climbing, turning etc.) of existing AFS by various sensor detected vehicles, then with ECU (Electrical Control Unit) (Electronic Control Unit of detected information input, be called for short " ECU "), ECU calculates according to these information and judges, to the actuating device output control signal of adjusting the car light irradiation direction, control this actuating device the direction of illumination of car light is adjusted (for example, the X deflection angle of left and right car light and vertical deflection angle).
Fig. 1 and 2 has shown the actuating device of a kind of ASF of being used for, and this actuating device comprises: 41 ', one of housing that is made of upper shell 41U ' and lower house 41D ' is arranged in the motor 45 ' between upper shell 41U ' and the lower house 41D '.In order to guarantee the stability of rotation of motor 45 ', the rotating shaft 453 ' two ends of motor 45 ' are supported on upper shell 41U ' respectively and lower house 41D ' goes up in the corresponding supported hole.In view of rotating shaft 453 ' is rotated with high rotational speed usually, in order to reduce the wearing and tearing of rotating shaft 453 ' to the supported hole of housing 41 ', be provided with a support sleeve 452 ' at rotating shaft 453 ' one end, and in corresponding supported hole 414 ', be provided with a thrust baring 451 '.The other end of rotating shaft 453 ' is provided with a driven wheel 461 '.To control signal of adjusting the car light irradiation direction of motor 45 ' output, motor 45 ' drives corresponding gear reduction by driven wheel 461 ' to the ECU (not shown), and adjusts the direction of illumination of car light according to detected traveling state of vehicle.
Motor 45 ' can be built in the housing 41 ', and this version need be carried out integrated design to housing 41 ' and motor 45 '.But owing to there are wearing and tearing, need support sleeve 452 ' be set in the end of the rotating shaft 453 ' of motor 45 ', therefore will be at the different motor 45 ' of actuating device design of different model, and at different motors 45 ', go up the corresponding supported hole of design at housing 41 ', reduce the design-calculated alerting ability, increased cost.In addition, be to guarantee accuracy of positioning, need the position of the corresponding supported hole of lower house on the precise design, design, manufacturing and even the assembling of housing 41 ' proposed high requirement, this has increased cost equally.
Usually, because the material of rotating shaft and housing is different, also different in the distortion that different temperatures lower rotary shaft and housing produce because of expanding with heat and contract with cold, machine shaft directly is supported on the housing, can cause the concentricity generation deviation of machine shaft with stator, influence driving efficiency, even have the housing danger that rotating shaft is stuck.And, when the manufacturing of housing and motor or mismatch error exceed certain scope, be easy in fitting process, cause the rotating shaft of motor to occur eccentric, thereby have influence on the normal engaged of driven wheel 461 ' and next stage gear, not only quicken the wearing and tearing of gear, the service life of the whole device of influence, and can produce unnecessary noise.
So, be necessary to provide a kind of car lamp steering driving mechanism, fundamentally to overcome above-mentioned defective of the prior art.
The utility model content
The purpose of this utility model is to propose a kind of car lamp steering driving mechanism, and the requirement that it has reduced design, manufacturing and assembly precision to parts has reduced manufacturing cost.
Another purpose of the present utility model is to propose a kind of car lamp steering driving mechanism, and this actuating device can be eliminated gear-driven gap, improves control accuracy, and can reduce the noise of system.
Another purpose of the present utility model is to propose a kind of car lamp steering driving mechanism, need not to design special supported hole according to the location of machine shaft, thereby has reduced the requirement of design, manufacturing and assembly precision to housing, has reduced manufacturing cost.
Of the present utility model to also have a purpose be to propose a kind of car lamp steering driving mechanism, and it need not the rotary state that the additive incrementation equipment gear just can detecting motor, has saved cost.
For realizing above-mentioned purpose of the present utility model, the utility model proposes a kind of car lamp steering driving mechanism, this actuating device comprises a housing, a motor, circuit card and gear reduction, this housing comprises a upper shell and a lower house, formed a spatial accommodation between described upper shell and the described lower house, described gear reduction and described circuit card are arranged in this spatial accommodation, wherein, described motor is fixed on described hull outside by the fixed mechanism on this casing; The roller end of described motor wears in the described housing and links to each other with a driven wheel, and this driven wheel and described gear reduction mesh, and drives the direction of illumination that described car light turns to the change car light by the output shaft of described gear reduction; Be arranged with two torsion springs that oppositely are provided with on the described output shaft.
Preferably, the second stage reducing gear that described reducing gear has first order reducing gear and is engaged with, the quadrant gear that is wholely set on described second stage reducing gear and described output shaft engagement.
Preferably, described two torsion springs are a big torsion spring and a little torsion spring, and described little torsion spring set is in described big torsion spring.
Preferably, an end of described big torsion spring and/or an end hook of little torsion spring hang on the described quadrant gear, and the other end of described big torsion spring and/or the other end of little torsion spring are hooked on the described upper shell.At confined state, described large and small torsion spring is limited in quadrant gear certain equilibrium point position between two limiting sections that are provided with in the lower house with its torsion; In working order, described quadrant gear overcomes the torsion rotation of big torsion spring or little torsion spring respectively.
Preferably, one of described first reducing gear and second reducing gear are provided with a magnet ring, and the position corresponding to described magnet ring on the described circuit card is provided with the magnetic induction part that at least one detects the action of above-mentioned motor.Described magnetic induction part is a Hall element.
Preferably, the position corresponding to the rotating shaft of described motor on the described housing is provided with a through hole, and the diameter of this through hole is greater than the external diameter of described driven wheel.The casing of described motor has a grounding pin.
Owing to be arranged with two torsion springs that oppositely are provided with on the output shaft of car lamp steering driving mechanism of the present utility model, thereby the gap between gear can be eliminated owing to the anti-torsion of torsion spring, thereby can improve the control accuracy of output shaft, reduce simultaneously because the noise that gear clearance is brought.And no matter the gear train whichaway drives, and two torsion springs of above-mentioned reverse setting all can play a role, and have thoroughly eliminated the gear clearance of positive and negative both direction, and control accuracy is better, and noise is also lower.
In addition, the casing of motor is fixed on the mode of the hull outside of actuating device by fixed mechanism, make the gravity of motor and driving force be distributed to each attachment point position with casing, therefore as long as guarantee that being connected firmly of each attachment point position can guarantee that motor can be fixed on the casing of actuating device.
In addition, magnet is set directly at mode on the reducing gear, need not the rotary state that the additive incrementation equipment gear just can detecting motor, saved cost by this.
And, the installation site of the rotating shaft of motor of the present utility model can be provided with a through hole that diameter is bigger, thereby need not provide the structural support on the housing of actuating device, saved cost on the one hand, on the other hand, avoided eccentric and stuck defective because of the rotating shaft that distortion caused of the housing of actuating device.
Description of drawings
The following drawings only is used for the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 and Fig. 2 are a kind of structural representations of car lamp steering driving mechanism;
Fig. 3 is the structural representation of car lamp steering driving mechanism of the present utility model;
Fig. 4 is the perspective exploded view of car lamp steering driving mechanism of the present utility model;
Fig. 5 is the partial, exploded perspective view of Fig. 4;
Fig. 6 is the transparent view of the output shaft part of car lamp steering driving mechanism of the present utility model;
Fig. 7 is the front elevation of Fig. 6.
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model.Wherein, identical parts adopt identical label.
Referring to Fig. 3-4, what wherein show is car lamp steering driving mechanism according to a preferred embodiment of the present utility model, and wherein Fig. 4 is the decomposition diagram of Fig. 3 after reversing.This actuating device comprises 1, one gear reduction 3 of 2, one motors of a housing and a circuit card 4.
Housing 2 is made of upper shell 21 and lower house 22, and upper shell 21 is provided with a plurality of buckles 211, and lower house 22 is provided with a plurality of retaining rings 221, and buckle 211 is meshing with each other with corresponding retaining ring 221, and upper shell 21 and lower house 22 are linked together.Certainly, it will be appreciated by those skilled in the art that upper shell 21 and lower house 22 can also be fixed together by any usual connection mode.For example, a plurality of lugs 212 can be set on upper shell 21, a plurality of lugs 222 are set on lower house 22, utilize screw that cooresponding lug on the upper and lower casing is connected, upper shell 21 and lower house 22 can be fixed together.Formed a spatial accommodation between upper shell 21 and the lower house 22, circuit card 4 and gear reduction 3 place this spatial accommodation.
Motor 1 is arranged on the outside of housing 2, is arranged on the outside of upper shell 21 specifically.The end of the rotating shaft of motor 1 wears into housing 2, links to each other with a driven wheel 5.Position corresponding to the rotating shaft of motor 1 on the housing 2 is provided with a through hole (not shown), and the diameter of through hole is greater than the external diameter of driven wheel 5.Motor has a casing 11, casing 11 is provided with fixed mechanism and a grounding pin 113, fixed mechanism is used for motor 1 overall fixed at housing 2, grounding pin then is used to make casing 11 ground connection of motor 1, eliminates the electromagnetic interference to other electric elementss (for example magnetic induction part 45) in the housing 2 in motor 1 working process.Fixed mechanism can comprise a plurality of flat fixing feet 116, fixing feet 116 is buckled in a plurality of long and narrow motor fixed orifice 216 of relative set on the upper shell 21, fixed orifice 216 is more bigger than the size of fixing feet 116, can adjust the relative position of motor 1 and upper shell 21 when being used for being fixed on motor 1 on the upper shell 21, thereby can adapt to the requirement of reduction, reduce the manufacturing cost of housing 2 design, manufacturing and the assembly precision of housing 2.Certainly, it will be appreciated by those skilled in the art that the utility model can also adopt other connection mode that motor 1 is fixed on the upper shell 21, for example, can adopt the screw ways of connecting that the casing 11 of motor 1 is fixed on the upper shell 21.
Reduction gear 3 comprises a first order reducing gear 31 and a second stage reducing gear 32, first reducing gear 31 is made up of big gear wheel 311 that forms one and miniature gears 312, and second reducing gear 32 is made up of big gear wheel 321 that forms one and miniature gears 322.Big gear wheel 311 engagements of the driven wheel 5 and first reducing gear 31; The miniature gears 312 of first reducing gear 31 again with big gear wheel 321 engagement of second reducing gear 32; Then, quadrant gear 34 engagements that are wholely set on the miniature gears 322 of second reducing gear 32 and the output shaft 33.Adopt this structure, the rotation of motor 1 can be passed to first reducing gear 31 via driven wheel 5, pass to second reducing gear 32 then, by quadrant gear 34 rotation is passed to output shaft 33 outputs at last, and then drive car lights by output shaft 33 and turn to, thereby changed the direction of illumination of car light.
Excessively cause damage for avoiding car light under the driving of motor 1, to rotate, can set the stroke of corresponding mechanics limit output shaft 33.As shown in Figure 5, be provided with two limiting sections 217,217 ' in lower house 21, it is excessive to be used to stop that quadrant gear 34 avoids it to rotate, thus the stroke of the output shaft 33 that control links to each other with these quadrant gear 34 one.
Second reducing gear 32 is provided with a magnet ring 35, and the position corresponding to magnet ring 35 on the circuit card 4 is provided with at least one magnetic induction part 45, is used to detect the action of motor 1.Certainly, it will be appreciated by those skilled in the art that magnet ring 35 also can be arranged on second reducing gear 31.The set magnetic induction part 45 of the utility model can be a Hall element, by this magnet is set directly at mode on the reducing gear, need not the rotary state that the additive incrementation equipment gear just can detecting motor, has saved cost.
Be arranged with two torsion springs 37,37 ' of size on the output shaft 33, its medium and small torsion spring 37 ' is enclosed within the big torsion spring 37.Know clearly as Fig. 5-7 and to show, an end 371 of big torsion spring 37 is hooked on the flange bank 341 of quadrant gear 34, and the other end 372 is hooked on the deck 218 on the upper shell 21; One end 371 ' of little torsion spring 37 ' is hooked on another flange bank 341 ' of quadrant gear 34, and the other end 372 ' of little torsion spring is hooked on the same deck 218 of upper shell 21.Large and small torsion spring 37,37 ' is oppositely to be provided with, that is, the torsion direction of two torsion springs 37,37 ' is opposite, has limited the rotation of quadrant gear 34 from both direction.Being provided with of large and small torsion spring 37,37 ' can be eliminated gap between intermeshing each gear with its torsion, thereby can improve the control accuracy of output shaft 33, reduced simultaneously because the noise that each gear clearance is brought.Especially, no matter the gear train whichaway drives, and two torsion springs 37,37 ' of above-mentioned reverse setting all can play a role, and have thoroughly eliminated the gear clearance of positive and negative both direction, and control accuracy is better, and noise is also lower.
After output shaft 33 and large and small torsion spring 37,37 ' were assemblied in the housing 2, the large and small torsion spring 37,37 ' that is in compressive state was limited in two limiting sections 217 with its torsion with quadrant gear 34, certain the equilibrium point position between 217 '.When motor 1 drives reduction gear 3 rotations, gear reduction 3 will drive the torsion rotation that quadrant gear 34 overcomes big torsion spring 37 or little torsion spring 37 ' respectively.For example, when quadrant gear 34 when Fig. 6 clockwise direction rotates, quadrant gear 34 need overcome the torsion of big torsion spring 37, little torsion spring 37 ' only promoted quadrant gear 34 with less thrust and rotated this moment; When quadrant gear 34 during along Fig. 6 anticlockwise motion, quadrant gear 34 need overcome the torsion of little torsion spring 37 ', and big torsion spring 37 only promoted quadrant gear 34 with less thrust and rotated this moment.The slewing area of quadrant gear 34 is limited in two limiting sections 217, between 217 '.
In another embodiment of the present utility model, motor 1 and driven wheel 5 can be in the same place as an independent detail assembly, and with housing 2, circuit card 4, speed reduction gearing 3, output shaft 33 grades as another independent detail assembly together, because the diameter of the through hole that is provided with corresponding to machine shaft 13 positions on the housing 2 is greater than the external diameter of driven wheel 5, so can under the situation of not dismantling housing 2 motor 1 be installed on the housing 2 easily.Adopt this Design Mode of the present utility model, car lamp steering driving mechanism all needn't be too overcritical to the requirement of parts design, manufacturing and assembly precision, thereby reduced manufacturing cost.
In addition, motor case 11 is fixed on the mode in housing 2 outsides by fixing feet 116, make the gravity and the driving force of motor 1 be distributed to each position of fixing with housing 2, therefore as long as guarantee that being connected firmly of each attachment point position can guarantee that motor can be fixed on the housing 2.
The above only is the schematic specific embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations, the modification of being done under the prerequisite that does not break away from design of the present utility model and principle and combining all should belong to the scope of the utility model protection.