CN212963277U

CN212963277U - Vehicle body height position sensor structure

Info

Publication number: CN212963277U
Application number: CN202022304388.8U
Authority: CN
Inventors: 叶国威; 康元福; 伊晨晖
Original assignee: Zhejiang Woder Technology Group Co ltd
Current assignee: Zhejiang Woder Technology Group Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-04-13
Anticipated expiration: 2030-10-16

Abstract

The utility model relates to a sensor structure. The utility model provides a car body height position sensor structure, includes the rocking arm subassembly, the one end of rocking arm subassembly is connected with sensor module, and the other end of rocking arm subassembly is connected with the link arm subassembly, sensor module include the shell, be equipped with the PCB board in the shell, install the chip on the PCB board, be equipped with the installation department on the shell, install spindle unit in the installation department, spindle unit include the main shaft, the main shaft cross-under meets with the rocking arm subassembly behind the mounting hole of installation department, installs the response piece on the main shaft the chip on be equipped with primary and secondary, the response piece moves at coil coverage. The utility model provides a vehicle body height position sensor structure with flexible arrangement, simple structure and strong anti-electromagnetic interference capability; the technical problems that an automobile body height sensor in the prior art is large in size, high in cost and poor in arrangement flexibility are solved.

Description

Vehicle body height position sensor structure

Technical Field

The utility model relates to a sensor structure especially relates to sensor structure of test automobile body suspension height.

Background

The vehicle Height Sensor (english chasses Height Sensor, also called axle Height Sensor, vehicle attitude Sensor, suspension Height Sensor, etc.) is an essential part for measuring the change of the front and rear suspension attitude of the vehicle body on the vehicle. At present, in a suspension control system (such as an active suspension system, a suspension damping control system, an air suspension system and the like) of an automobile, an automatic headlamp adjusting system needs to measure the change of the driving posture of the automobile through a sensor.

The body height sensor is an indispensable part in the headlamp level automatic adjusting device, and 1 to 2 sensors are used in each vehicle. Therefore, with the increasing popularity of the HID headlamp and the LED headlamp, the market demand of the vehicle height sensor is huge.

As in the Chinese patent: "automobile body height sensor (CN 201510158883.3)", it includes casing and rotor, be equipped with hall chip, bearing in the casing, the rotor includes the pivot, links to each other and is used for connecting the swing arm of automobile body and arranges in with the pivot epaxial magnetic ring rotates, the pivot is worn to establish in the bearing, just the pivot overcoat is equipped with the torsional spring that keeps the swing arm gesture, and the one end of torsional spring is fixed the other end is fixed on the rotor on the casing. The sensor is internally realized by a magnet and a Hall element, and has poor installation flexibility and low precision.

Disclosure of Invention

The utility model provides a vehicle body height position sensor structure with flexible arrangement, simple structure and strong anti-electromagnetic interference capability; the technical problems that an automobile body height sensor in the prior art is large in size, high in cost and poor in arrangement flexibility are solved.

The utility model also provides a vehicle height position sensor structure with reliable structure and high precision; the technical problems that a sensor structure is easily influenced by a running distance and is low in precision in the prior art are solved.

The above technical problem of the present invention is solved by the following technical solutions: the utility model provides a car body height position sensor structure, includes the rocking arm subassembly, the one end of rocking arm subassembly is connected with sensor module, and the other end of rocking arm subassembly is connected with the link arm subassembly, sensor module include the shell, be equipped with the PCB board in the shell, install the chip on the PCB board, be equipped with the installation department on the shell, install spindle unit in the installation department, spindle unit include the main shaft, the main shaft cross-under meets with the rocking arm subassembly behind the mounting hole of installation department, installs the response piece on the main shaft the chip on be equipped with primary and secondary, the response piece moves at coil coverage.

The lower swing arm of the automobile is connected with a spindle of an angle sensor through a connecting arm component and a rocker arm component, when the height of an automobile body changes, the rocker arm can rotate by taking the spindle as a circle center, the spindle of the angle sensor is driven to rotate, an output signal of the angle sensor changes, and the change of the height of the automobile body is indirectly reflected.

The induction sheet influences the coupling of the magnetic field through the eddy current effect so as to influence the induction voltage, the induction sheet is arranged at different positions, the two groups of secondary coils receive different induction voltages, and the position of the induction sheet is obtained by calculating the ratio of the induction voltages of the two groups of secondary coils. The main shaft penetrates through the shell to be arranged, the mounting position of the sensor assembly is flexible, shaft penetrating type mounting can be achieved, the anti-electromagnetic interference capability of the sensor is strong, and the accuracy of the sensor is improved.

Preferably, the number of the induction sheets is four, the induction sheets are uniformly distributed outside one rotating wheel, a through hole is formed in the center of the rotating wheel, and the main shaft penetrates through the through hole to be fixed with the rotating wheel. The sensor chip adopts 360-degree circular design for sharing the sensors on the left side and the right side of the vehicle body, and the circular sensor chip has four spokes with the same shape, so that the sensor chip can be supported to realize linear signal output in each 90-degree range in 4 periods.

Preferably, there are two sets of secondary coils, and the primary coil and the secondary coil are both connected to the chip pins. The two groups of secondary coils are respectively designed into sine and cosine shapes, so that the amplitudes of the two groups of induced voltages also show sine and cosine changes along with the movement of the induction sheet, signals which are approximate to sin and cos changes are obtained through signal demodulation, and then the inverse tangent is calculated to obtain an electrical angle signal with better linearity.

Preferably, a cover plate welded with the shell is arranged on one side of the PCB. The shell and the cover plate are welded by laser, and the laser welding process is mature and reliable and has better air tightness.

Preferably, the rocker arm assembly comprises a rocker arm, a spindle hole is formed in one end of the rocker arm, a connecting arm shaft hole is formed in the other end of the rocker arm, the spindle penetrates through the mounting hole in the shell and then is sequentially sleeved with the wear-resistant ring and the framework oil seal, and the end portion of the spindle is located in the spindle hole. A special plastic wear-resistant ring is adopted and placed on the main shaft, so that abrasion to the plastic shell after the main shaft and the shell rotate and the influence to the model precision after abrasion are avoided. The sealing between the main shaft and the shell adopts a framework oil seal design, so that the internal sealing between the rotating shaft and the shell can be realized.

Preferably, the connecting arm assembly comprises a connecting arm, and two ends of the connecting arm are respectively connected with the rocker arm and the connecting arm bracket through ball bolts. The round matching of the ball stud and the connecting arm can effectively prevent the motion of the chassis in the non-height direction from being transmitted to the rocker arm and the main shaft of the sensor, and damage to the sensor is avoided.

Therefore, the utility model discloses a vehicle body height position sensor structure possesses following advantage: the sensor has the advantages of good installation flexibility, high testing precision, good universality, simple structure and capability of being used on the left side and the right side of the vehicle body.

Drawings

Fig. 1 is a schematic view of a vehicle body height position sensor structure.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view of the PCB board in fig. 2.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b):

as shown in fig. 1, 2 and 3, a vehicle body height position sensor structure includes a connecting arm assembly 2, a rocker arm assembly 3, and a sensor assembly 4, which are connected in this order. The connecting arm assembly 2 is connected to a lower swing arm of an automobile chassis through the connecting arm support 1, and the sensor assembly 4 is installed on the automobile chassis through the sensor installation frame 5.

The connecting arm assembly 2 comprises a connecting arm 7, two ends of the connecting arm 7 are connected with a connecting arm support 1 and a rocker arm 9 through ball head bolts 8 respectively, the other end of the rocker arm is provided with a spindle hole, and a spindle 14 penetrates through the spindle hole.

The sensor assembly 4 comprises a housing 18 which is injection-molded from plastic, the housing 18 being provided centrally with a through-opening 19, the spindle 14 being inserted into the through-opening 19. One end of the main shaft 14 is sleeved with a rotating wheel, and four sensing pieces 10 are uniformly distributed on the rotating wheel. The other end of the main shaft 14 penetrates through the through hole and then is sleeved with a wear-resisting ring 17, a framework oil seal 11 and a protective gasket 12, and then penetrates through a main shaft hole in the rocker arm 9 to rotate together with the rocker arm 9. The PCB 13 is arranged on one side of the rotating wheel, the PCB 13 is encapsulated in the shell 18, the chip 20 is installed on the PCB 13, two groups of secondary coils 22 and one group of primary coils 21 are arranged above the chip 20, and the primary coils 21 and the secondary coils 22 are respectively connected with pins on the chip 20. The primary coil 21 and the secondary coil 22 are located within the projection of the wheel on the PCB board 13. After the PCB 13 is fixed in the housing 18, a cover plate 16 is then mounted on the housing by laser welding, ensuring the reliability and airtightness of the sensor assembly.

A connector 6 is arranged on one side of the housing, in which connector a PIN 15 is arranged. The sensor mounting frame is connected with the shell through bolts.

Claims

1. The utility model provides a vehicle body height position sensor structure, includes the rocking arm subassembly, the one end of rocking arm subassembly is connected with the sensor subassembly, and the other end of rocking arm subassembly is connected with connection arm subassembly, its characterized in that: the sensor assembly include the shell, be equipped with the PCB board in the shell, install the chip on the PCB board, be equipped with the installation department on the shell, install main shaft assembly in the installation department, main shaft assembly include the main shaft, the main shaft cross-under meets with the rocking arm subassembly behind the mounting hole of installation department, installs the response piece on the main shaft the chip on be equipped with primary and secondary coil, the response piece moves at coil coverage.

2. A vehicle body height position sensor structure according to claim 1, wherein: the induction sheets are uniformly distributed outside the rotating wheel, a through hole is formed in the center of the rotating wheel, and the main shaft penetrates through the through hole to be fixed with the rotating wheel.

3. A vehicle body height position sensor structure according to claim 1 or 2, wherein: and the two groups of secondary coils are provided, and the primary coil and the secondary coil are connected with the chip pins.

4. A vehicle body height position sensor structure according to claim 1 or 2, wherein: and a cover plate welded with the shell is arranged on one side of the PCB.

5. A vehicle body height position sensor structure according to claim 1 or 2, wherein: the rocker arm assembly comprises a rocker arm, a main shaft hole is formed in one end of the rocker arm, a connecting arm shaft hole is formed in the other end of the rocker arm, a wear-resisting ring and a skeleton oil seal are sequentially sleeved after the main shaft penetrates through a mounting hole in the shell, and the end portion of the main shaft is located in the main shaft hole.

6. A vehicle body height position sensor structure according to claim 1 or 2, wherein: the connecting arm assembly comprises a connecting arm, and two ends of the connecting arm are respectively connected with the rocker arm and the connecting arm bracket through ball bolts.