CN204514263U

CN204514263U - Height sensor

Info

Publication number: CN204514263U
Application number: CN201520201710.0U
Authority: CN
Inventors: 刘峰; 王永和; 朱兴东; 李波波; 周玉伟
Original assignee: Shanghai Xinyao Electronics Co Ltd
Current assignee: Shanghai Xinyao Electronics Co Ltd
Priority date: 2015-04-07
Filing date: 2015-04-07
Publication date: 2015-07-29
Anticipated expiration: 2025-04-07

Abstract

The utility model provides a kind of height sensor, it comprises housing and rotor, Hall chip, bearing is provided with in described housing, described rotor comprises rotating shaft, be connected with rotating shaft and for the swing arm that is connected vehicle body and the magnet ring be placed in described rotating shaft, described rotating shaft is located in described bearing, and outside described rotating shaft, being arranged with the torsion spring keeping swing arm attitude, one end of torsion spring is fixed on the other end on described rotor and fixes on the housing.The utility model adopts and arrange torsion spring in housing, this torsion spring can remain the normal attitude of swing arm, attitude and swing arm locality in space, swing arm attitude is caused to change even if touch swing arm when therefore installing, torsion spring also can make it be reset to original state, the performance reliability used after height sensor is installed can be guaranteed like this, make height sensor have good vibration resistance.

Description

Height sensor

Technical field

The utility model relates to the correlative technology field of automotive electronic technology, particularly relates to a kind of height sensor.

Background technology

Automobile sensor, as the information source of Auto Electronic Controlled System, is the critical component of Auto Electronic Controlled System, is also one of core content of technical field of automotive electronics research.Automobile sensor is to temperature, pressure, position, highly, the various information such as acceleration and vibration carries out in real time, measure accurately and control.The key weighing modern sedan limousine control system level is just quantity and the level of its sensor, but the automobile sensor product of domestic existing highest level falls more than 10 year than same kind of products at abroad, wants import 500,000 to overlap above high-performing car sensor every year.Height sensor is a current or new technology at home, and the height sensor that existing luxury car uses is all import parts, and prices are rather stiff.

Chinese patent ZL201420642473.7 discloses a kind of height sensor for automobile body, it mainly comprises shell, be arranged at rocker assembly that hall sensor in shell and rotating assembly, the described rotating assembly of drive rotate and the connector for the lamp light control system that described hall sensor is connected to automobile, described hall sensor comprises Hall chip, described connector comprises contact pin, and described Hall chip is directly connected with described contact pin.This patent is directly connected with described contact pin mainly through Hall chip, improves the reliability of sensor.

But current height sensor for automobile body easily touches rocker assembly when using and installing, there is the problems such as service precision is inaccurate after making it install, therefore need a kind of height sensor that can ensure service precision.

Utility model content

The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of height sensor, for solving in prior art the problem of installing the follow-up service precision of appropriate to the occasion impact.

For achieving the above object and other relevant objects, the utility model provides a kind of height sensor, it comprises housing and rotor, Hall chip, bearing is provided with in described housing, described rotor comprises rotating shaft, be connected with rotating shaft and for the swing arm that is connected vehicle body and the magnet ring be placed in described rotating shaft, described rotating shaft is located in described bearing, and is arranged with the torsion spring keeping swing arm attitude outside described rotating shaft, and one end of torsion spring is fixed on the other end on described rotor and fixes on the housing.

Preferably, also O-ring seal is provided with between described housing and described rotor.

Preferably, epoxy sealing layer is provided with in described housing.

Preferably, described housing is provided with to be connected with described Hall chip and carries terminal for the signal being connected external unit.

Preferably, one end and the described swing arm of described rotating shaft are fixed, and the other end of rotating shaft is provided with the draw-in groove of accommodating described magnet ring.

As mentioned above, height sensor of the present utility model, there is following beneficial effect: adopt and torsion spring is set in housing, this torsion spring can remain the normal attitude of swing arm, attitude and swing arm locality in space, cause swing arm attitude to change even if touch swing arm when therefore installing, torsion spring also can make it be reset to original state, the performance reliability used after height sensor is installed can be guaranteed like this, make height sensor have good vibration resistance; In addition, its anti-high and low-temp and good sealing is also improved by the setting of O-ring seal and epoxy sealing layer.

Accompanying drawing explanation

Fig. 1 is shown as the overall schematic of height sensor of the present utility model.

Fig. 2 is shown as the structural representation of described rotor of the present utility model.

Fig. 3 is shown as the circuit diagram of described Hall chip place of the present utility model wiring board.

Element numbers explanation

1 rotor

11 fins

2 swing arms

3 torsion springs

4 O-ring seals

5 housings

6 signal conveying terminals

7 rotating shafts

Embodiment

By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present utility model and effect easily.

Refer to Fig. 1 to Fig. 3.Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, all should still drop in scope that technology contents that the utility model discloses can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.

As shown in Figures 1 and 2, the utility model provides a kind of height sensor, it comprises housing 5 and rotor 1, Hall chip U1 (as shown in Figure 3), bearing is provided with in housing 5, rotor 1 comprises rotating shaft 7, be connected with rotating shaft 7 and for the swing arm 2 that is connected vehicle body and the magnet ring be placed in rotating shaft 7, Hall chip is positioned in the middle of magnet ring, rotating shaft 7 is located in bearing, and outside rotating shaft, being arranged with the torsion spring 3 keeping swing arm 2 attitude, one end of torsion spring 3 is fixed on the other end on rotor 1 and is fixed on described housing 5.The utility model adopts in housing, arranges torsion spring 3, this torsion spring 3 can remain the normal attitude of swing arm 2, attitude and swing arm 2 locality in space, swing arm attitude is caused to change even if touch swing arm 2 when therefore installing, torsion spring 3 also can make it be reset to original state, the performance reliability used after height sensor is installed can be guaranteed like this, make height sensor have good vibration resistance.

For ease of locating the end of torsion spring, in rotor 1, be provided with groove fin 11 place of outwardly convex (namely on Fig. 2 rotor 1), one end of torsion spring is fastened in this groove, by torsion spring its own resilient, swing arm is remained same attitude.

The concrete structure of above-mentioned rotor is: one end of rotating shaft 7 is connected with swing arm 2 by crimping, and magnet ring is bonded to the draw-in groove inner ring surface of the rotating shaft other end, and swing arm 2 is connected to automobile chassis, in real time the change of induction bodywork height.When swing arm 2 is rocked, magnet ring will rotate accordingly, thus makes the Hall chip in the middle of magnet ring 2 experience the magnetic field intensity of change, and exports corresponding voltage signal by the wiring board (as shown in Figure 3) of carrying Hall chip.The magnet ring that the present embodiment adopts is formed by the two poles of the earth Agglutinate neodymium-iron-boron material die casting in opposite directions, and Distribution of Magnetic Field is even, and high temperature performance is good.Rotating shaft 7 and swing arm are controlled by high precision crimping, good concentricity.

Above-mentioned Hall chip adopts general proframmable linear Hall chip, greatly must reduce cost, simultaneously also can done with high accuracy magnetic field induction and conversion, and as shown in Figure 3, Hall chip U1 is provided with multiple output mode pattern: simulation, PMW or SPI signal; Peripheral circuit comprises three electric capacity C1, C2, C3, can well play filter action and meet the requirement of EMC.Arrange reference column in housing 5, make the pole magnetic dot of Hall chip and magnet ring on the same axis by reference column, export (simulation, PMW or SPI) signal accuracy high, the linearity is good.Housing 5 is provided with to be connected with Hall chip carries terminal 6 for the signal being connected external unit, and in the present embodiment, signal conveying terminal is three contact pins, is welded on the wiring board of Hall chip by contact pin.

Between above-mentioned housing 5 and rotor 1, be also provided with O-ring seal 4, improve the sealing of height sensor self.Be provided with epoxy sealing layer in housing 5, when above-mentioned three contact pins are soldered on the wiring board of Hall chip, oil sealing enters in housing by crimping, and epoxy resin injects the sealing of housing after coagulation, effectively reaches the effect of anti-high pressure, dust protection, splash-proof.

Bearing in above-mentioned housing 5 improves lubricity that rotor 1 rotates and controls its concentric rotation.Torsion spring 3 effectively improves the rebound resilience of swing arm 2.O-ring seal 4 effectively raises the dust tightness in housing.The shock resistance of the whole height sensor that the use of three contact pins is also considered, makes to rupture and to come off.Whole housing outward appearance is light, attractive in appearance, be easy to install.

In sum, height sensor of the present utility model, it is installed on automobile chassis, when bodywork height changes, drive rotating shaft to rotate by swing arm, thus change magnetic field intensity, by the change of Hall chip induced field intensity, last output voltage signal controls automobile front horizontal light-adjusting, prevents from, to the dazzle of opposite vehicle, significantly improving driving safety; Hall chip in height sensor responds to small angle change by a rotating seal physical construction.The utility model has the advantage of that the linearity is good, precision is high, and operation interval is large, real-time, adopts torsion spring as rebounding mechanism, improves freedom from vibration, anti-high and low-temp and good sealing.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.

Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.

Claims

1. a height sensor, it is characterized in that, comprise housing (5) and rotor (1), described housing is provided with Hall chip in (5), bearing, described rotor (1) comprises rotating shaft (7), to be connected with rotating shaft (7) and for the swing arm (2) that is connected vehicle body and the magnet ring be placed in described rotating shaft (7), described rotating shaft (7) is located in described bearing, and outside described rotating shaft (7), be arranged with the torsion spring (3) keeping swing arm (2) attitude, one end of torsion spring (3) is fixed on the upper other end of described rotor (1) and is fixed on described housing (5).

2. height sensor according to claim 1, is characterized in that: be also provided with O-ring seal (4) between described housing (5) and described rotor (1).

3. height sensor according to claim 1, is characterized in that: described housing is provided with epoxy sealing layer in (5).

4. height sensor according to claim 1, is characterized in that: described housing (5) is provided with to be connected with described Hall chip carries terminal (6) for the signal being connected external unit.

5. height sensor according to claim 1, is characterized in that: one end and the described swing arm (2) of described rotating shaft (7) are fixed, and the other end of rotating shaft (7) is provided with the draw-in groove of accommodating described magnet ring.