CN213984919U

CN213984919U - Zero-point clamping structure for automobile corner sensor

Info

Publication number: CN213984919U
Application number: CN202022453435.5U
Authority: CN
Inventors: 郭云龙; 丁贵亮; 李丰; 陈捷飞; 何雪梅; 王明胜; 孙菲琼
Original assignee: Shanghai Jtr Electric Appliance Co ltd
Current assignee: Shanghai Jtr Electric Appliance Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-08-17
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a screens structure at zero point for car corner sensor, this structure includes the last casing of corner sensor, casing and sun gear down, go up casing and casing lock down and vacuole formation, the sun gear is located in casing and the cavity between the casing down, the sun gear inner circle is equipped with the boss, this structure still includes the screens round pin at zero point, screens round pin front end bottom surface at zero point is equipped with the buckle and extends backward has the flat board, dull and stereotyped middle part bottom surface is equipped with spacing draw-in groove, the buckle lock of screens round pin front end bottom surface at zero point is on the upper housing surface, the spacing draw-in groove of dull and stereotyped middle part bottom surface inserts the cavity and blocks in the boss of sun gear inner circle, be equipped with the tear notch between screens round pin front end at zero point and the flat board of backward extension. The structure is convenient to assemble, the zero loss of the corner sensor before loading can be effectively avoided, the accuracy of signal acquisition of the corner sensor is ensured, and the fault rate of the corner sensor after loading is reduced.

Description

Zero-point clamping structure for automobile corner sensor

Technical Field

The utility model relates to an automobile sensor technical field especially relates to a screens structure at zero point for car corner sensor.

Background

At present, the vehicle corner sensor is one of the collected signals of the vehicle electronic control system, is an important component of the vehicle electronic control system, and is widely applied to control systems such as steering, chassis height, ETC, and an electronic accelerator pedal.

The corner sensor is realized in the early stage mainly in a sliding film resistance mode, and has high failure rate and serious damage. At present, the automobile corner sensor is changed to a contact mode formed by Hall devices, and the key of the Hall corner sensor is the design of the Hall devices and a magnetic circuit. The quality of the magnetic circuit design determines the complexity, manufacturing cost, output linearity, etc. of the rotation angle sensor. A rotating shaft, a magnetic collecting ring, a magnet, a reset spring, a PCB, a single Hall device, a capacitor, a wiring terminal, a magnetic separation sheet and an end cover are arranged inside a shell of the existing Hall angle sensor. The Hall device and the capacitor are welded at one end of the PCB and are arranged on a central axis formed by the magnetic collecting ring and the magnet, and the other end of the PCB is welded on the wiring terminal. After the test of the corner sensor is completed, zero calibration needs to be carried out, but zero deviation caused by various factors such as carrying and the like often occurs in the process of the corner sensor before leaving a factory and before loading, so that the measurement of the angle is deviated after loading, and the accuracy of signal acquisition of the corner sensor is seriously influenced.

Disclosure of Invention

The utility model aims to solve the technical problem that a screens structure at zero point for car corner sensor is provided, this structure equipment is convenient, can effectively stop the dress front corner sensor zero-bit and lose, ensures corner sensor signal acquisition's accuracy, reduces the fault rate of corner sensor behind the loading.

For solving the technical problem, the utility model is used for car corner sensor's zero point screens structure includes last casing, lower casing and sun gear of corner sensor, go up casing and casing lock down and vacuole formation, the sun gear is located in going up the cavity between casing and the lower casing, the sun gear inner circle is equipped with the boss, and this structure still includes zero point screens round pin, zero point screens round pin front end bottom surface is equipped with the buckle and extends backward has the flat board, dull and stereotyped middle part bottom surface is equipped with spacing draw-in groove, the buckle lock of zero point screens round pin front end bottom surface in last casing surface, the spacing draw-in groove of flat board middle part bottom surface inserts the cavity and block in the boss of sun gear inner circle, be equipped with the tear notch between zero point screens round pin front end and the flat board of backward extension.

Furthermore, the front end of the zero-point clamping pin is bent upwards in the radial direction and then extends backwards to form a flat plate, and the tearing opening is formed in the bent part of the front end of the zero-point clamping pin and the flat plate.

Furthermore, the limiting clamping grooves are formed by convex ribs which are arranged on the bottom surface of the middle part of the flat plate at intervals.

Because the utility model discloses a screens structure at zero point for car corner sensor has adopted above-mentioned technical scheme, this structure includes the last casing of corner sensor promptly, casing and sun gear down, go up casing and casing lock down and vacuole formation, the sun gear is located in the cavity between casing and the lower casing, the sun gear inner circle is equipped with the boss, this structure still includes the screens round pin at zero point, screen round pin front end bottom surface at zero point is equipped with the buckle and extends backward has the flat board, dull and stereotyped middle part bottom surface is equipped with spacing draw-in groove, the buckle lock of screens round pin front end bottom surface at zero point is on last casing surface, the spacing draw-in groove of dull and stereotyped middle part bottom surface inserts the cavity and blocks in the boss of sun gear inner circle, be equipped with the tear notch between screen round pin front end at zero point and the flat board of backward extension. The structure is convenient to assemble, the zero loss of the corner sensor before loading can be effectively avoided, the accuracy of signal acquisition of the corner sensor is ensured, and the fault rate of the corner sensor after loading is reduced.

Drawings

The invention will be described in further detail with reference to the following drawings and embodiments:

fig. 1 is a schematic diagram of a zero-point position clamping structure for an automobile corner sensor according to the present invention;

FIG. 2 is an exploded view of the components of FIG. 1;

FIG. 3 is a schematic diagram of the structure of the zero-point detent pin in the present structure;

fig. 4 is a schematic cross-sectional view of the structure.

Detailed Description

Embodiment as shown in fig. 1 to 4, the zero-point detent structure for an automobile rotation angle sensor of the present invention includes an upper housing 1, a lower housing 2 and a sun gear 3 of the rotation angle sensor, the upper shell 1 and the lower shell 2 are buckled to form a cavity, the sun wheel 3 is arranged in the cavity between the upper shell 1 and the lower shell 2, the inner ring of the sun wheel 3 is provided with a boss 31, the structure also comprises a zero-point clamping pin 4, the bottom surface of the front end of the zero-point clamping pin 4 is provided with a buckle 41 and a flat plate 42 which extends backwards, the bottom surface of the middle part of the flat plate 42 is provided with a limit clamping groove 43, the buckle 41 at the bottom surface of the front end of the zero-point clamping pin 4 is buckled on the surface of the upper shell 1, a limit clamping groove 43 on the bottom surface of the middle part of the flat plate 42 is inserted into the cavity and clamped on the boss 31 of the inner ring of the sun wheel 3, a tearing opening 44 is arranged between the front end of the zero-point clamping pin 4 and the flat plate 42 extending backwards.

Preferably, the front end of the zero-point position-clamping pin 4 is bent upwards and then extends backwards to form a flat plate 42, and the tearing opening 44 is formed at the bent part between the front end of the zero-point position-clamping pin 4 and the flat plate 42.

Preferably, the limiting clamping grooves 43 are formed by convex ribs 45 arranged on the bottom surface of the middle part of the flat plate 42 at intervals.

After the rotation angle sensor is tested and zero calibration is carried out, the buckle on the bottom surface of the front end of the zero clamping pin is connected with the upper shell, and meanwhile, the limiting clamping groove is inserted into a cavity between the upper shell and the lower shell and clamped on a boss of the inner ring of the sun wheel, so that the sun wheel is limited to rotate along the radial direction, and the limiting effect is achieved. When the corner sensor is installed and assembled with the clock spring, the tail end of the flat plate is held by hand and the tearing opening between the flat plate and the front end of the zero-point clamping pin is broken with force, the flat plate is separated from the front end of the zero-point clamping pin, the limiting clamping groove in the bottom surface of the middle of the flat plate is taken out of the cavity, the limiting clamping groove is separated from the boss of the sun wheel in a limiting mode, the sun wheel returns to rotate along the radial direction, and corner detection is achieved.

The utility model discloses simple structure easily realizes, and spacing reliable, breaks disconnected tearing notch off with the fingers and thumb and can't carry on spacingly once more. If the sun wheel is not limited before the corner sensor is assembled, an installer can judge that the corner sensor is risky and does not need to be loaded, the problem of failure after loading due to zero loss of the corner sensor is avoided, and the accuracy of signal acquisition of an electronic control system of the automobile is ensured.

Claims

1. The zero-point clamping structure for the automobile corner sensor comprises an upper shell, a lower shell and a sun wheel of the corner sensor, wherein the upper shell and the lower shell are buckled to form a cavity, the sun wheel is arranged in the cavity between the upper shell and the lower shell, and a boss is arranged on an inner ring of the sun wheel.

2. The zero-point clamping structure for the automobile rotation angle sensor according to claim 1, characterized in that: the front end of the zero-point clamping pin is bent upwards in the radial direction and then extends backwards to form a flat plate, and the tearing opening is formed in the bent part of the front end of the zero-point clamping pin and the flat plate.

3. The zero-point clamping structure for the vehicle rotation angle sensor according to claim 1 or 2, characterized in that: the limiting clamping grooves are formed by convex ribs which are arranged at intervals on the bottom surface of the middle part of the flat plate.