CN110001780A - A kind of steering angle sensor - Google Patents

Abstract

The invention discloses a kind of steering angle sensors, comprising: shell, pedestal, wiring board and measurement gear；First annular groove is provided in pedestal；First annular convex ribs compatible with annular groove are provided on measurement gear, measurement gear is arranged in pedestal by first annular convex ribs；Wiring board is connected to measurement gear relative on the other end of pedestal；Shell is fixedly connected with pedestal, and shroud is in outside wiring board and measurement gear.The present invention can be such that measurement gear is positioned by wiring board, shell and pedestal, it no longer needs using pressing plate or other auxiliary stopper components, production cost is saved, while installation procedure is easy, saves the working hour of assembly, in addition positioning accuracy is good, output of products precision is higher.

Description

A steering angle sensor

technical field

The invention relates to the field of automobile parts, in particular to a steering angle sensor.

Background technique

Steering angle sensor for automobile steering wheel is an indispensable part of automobile electronic stability control system (ESC/EBS). The steering angle sensor for automobile steering wheel is generally installed on the steering shaft of the steering column. The rotation direction and rotation angle to the steering shaft are used as one of the input signals of the ESC/EBS system. The steering angle sensor generally includes a main gear, a measuring gear, a pressure plate for positioning the measuring gear, a circuit board and an outer casing.

The following problems may occur in the production and use of the existing steering angle sensor: the pressure plate is used to limit the measuring gear, which is cumbersome to assemble and increases the cost; the limit of the gear is single, the positioning accuracy is not enough, and the output accuracy of the product is reduced. Therefore, the existing steering angle sensor structure needs to be improved.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a steering angle sensor, which can directly position and install the measuring gear without a pressing plate or other auxiliary limiting components.

The present invention adopts the following technical solutions to realize:

A steering angle sensor, the steering angle sensor comprises: a casing, a base, a circuit board and a measuring gear; a first annular groove is arranged in the base; a first annular groove is arranged on the measuring gear an adapted first annular rib, the measuring gear is disposed in the base through the first annular rib; the circuit board abuts on the other end surface of the measuring gear relative to the base; The casing and the base are fixedly connected, and are enclosed on the outside of the circuit board and the measuring gear.

Further, the base is also provided with a circular groove, the measuring gear is provided with a boss adapted to the circular groove, and the boss is arranged in the circular groove.

Further, a second annular rib is further provided on the end surface of the measuring gear relative to the circuit board, and the circuit board abuts on the second annular rib.

Further, the steering angle sensor further includes a main gear, and one end surface of the main gear is provided with a third annular groove.

Further, the base is further provided with a third annular protruding rib adapted to the third annular groove, and the main gear is arranged in the base through the third annular groove.

Further, a fourth annular groove is provided on the end surface of the main gear relative to the casing, and a fourth annular rib that is adapted to the fourth annular groove is arranged in the casing; the The casing is pressed against the main gear through the fourth annular rib.

Further, the inner side of the fourth annular convex rib is also provided with a plurality of strip-shaped convex ribs, and the strip-shaped convex ribs are tightly pressed against the main gear.

Further, a hollow column is arranged in the casing, a solid column adapted to the hollow column is arranged in the base, and a through hole adapted to the solid column is arranged on the circuit board; The circuit board is sleeved outside the solid column through the through hole, and the solid column is sleeved inside the hollow column.

Further, the casing is provided with a card slot, and the base is provided with a clip outside, and the casing and the base are snap-fitted and fixed through the card slot and the clip.

Compared with the prior art, the present invention has the following beneficial effects: through the cooperation of the first annular groove and the first annular rib, the measuring gear can be installed on the base; the casing and the base are fixedly connected, so that the circuit board connected to the measuring gear. According to the invention, the measuring gear can be positioned by the circuit board, the casing and the base, no pressing plate or other auxiliary limiting components are needed, and the production cost is saved. , The product output precision is high.

Description of drawings

1 is an exploded view of a steering angle sensor;

Fig. 2 is the schematic diagram of the shell;

Figure 3 is a schematic diagram of one end of the measuring gear relative to the base;

Fig. 4 is the schematic diagram of measuring gear relative to one end of the circuit board;

Figure 5 is a schematic diagram of one end of the main gear relative to the base;

Figure 6 is a schematic view of the main gear relative to one end of the housing;

Fig. 7 is the schematic diagram of the base;

8 is a first cross-sectional view of a steering angle sensor;

9 is a second cross-sectional view of the steering angle sensor;

In the figure: 10, shell; 11, fourth annular rib; 12, strip rib; 13, hollow column; 14, card slot; 20, circuit board; 21, through hole; 30, measuring gear; 31, The first annular rib; 32, the boss; 33, the second annular rib; 40, the main gear; 41, the third annular groove; 42, the fourth annular groove; 50, the base; 51, the first annular groove Slot; 52, circular groove; 53, third annular rib; 54, solid column; 55, buckle.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, on the premise of no conflict, the embodiments or technical features described below can be combined arbitrarily to form new embodiments. .

Referring to FIG. 1 , the present invention discloses a steering angle sensor, which includes a housing 10 , a base 50 , a circuit board 20 and a measuring gear 30 . The base 50, see FIG. 7, the inner side of the base 50 is provided with a first annular groove 51 for installing the measuring gear 30; the measuring gear 30, see FIG. 3, an end surface of the measuring gear 30 is provided with the first annular groove 51 The matching first annular rib 31, through the cooperation of the first annular rib 31 and the first annular groove 51, the measuring gear 30 is arranged and installed in the base 50; the circuit board 20, see FIG. 1, the circuit board 20 is The integrated circuit board equipped in the steering angle sensor abuts on the other end face of the measuring gear 30 relative to the base 50, and is used to limit the other end face of the measuring gear 30; the casing 10, see FIG. 1, the casing The body 10 and the base 50 are fixedly connected, and are enclosed on the outside of the circuit board 20 and the measuring gear 30 , so as to realize the radial limit of the measuring gear 30 .

Wherein, the number of the measuring gears 30 is two, and the number of the first annular grooves 51 is correspondingly two.

As a preferred embodiment, the base 50 is also provided with a circular groove 52. Referring to FIGS. 7 and 9, the circular groove 52 is arranged at the center of the first annular groove 51, and the depth of the circular groove 52 is greater than that of the first annular groove 51. The depth of the groove 51 is used for further positioning of the measuring gear 30 . Referring to FIG. 3 , the measuring gear 30 is provided with a boss 32 adapted to the circular groove 52 .

As a preferred embodiment, referring to FIG. 4 , the end surface of the measuring gear 30 relative to the circuit board 20 is further provided with a second annular rib 33 , and the circuit board 20 abuts on the second annular rib 33 . Since the measurement gear 30 rotates during the operation of the steering angle sensor, if the circuit board 20 is directly pressed against the entire end face of the measurement gear 30, it will affect the rotation of the measurement gear 30 and reduce the accuracy of the product output. By setting the second annular rib 33 , the circuit board 20 can be in contact with the measuring gear 30 while reducing the contact area between the two, thereby reducing the influence on the rotation of the measuring gear 30 .

As a preferred embodiment, the steering angle sensor further includes a main gear 40 . The main gear 40 is arranged above the measuring gears 30 and meshes with the two measuring gears 30 for transmitting the angle parameter of the steering wheel rotation to the measuring gears 30 . Referring to FIG. 5 , one end surface of the main gear 40 is provided with a third annular groove 41 . Further preferably, referring to FIG. 7 and FIG. 9 , the base 50 is provided with a third annular rib 53 that is adapted to the third annular groove 41, and through the cooperation of the third annular rib 53 and the third annular groove 41, The main gear 40 may be arranged and installed in the base 50 . Among them, the number of the main gear 40 is one.

As a preferred embodiment, referring to FIG. 6 , a fourth annular groove 42 is provided on the end surface of the main gear 40 relative to the casing 10 , and referring to FIGS. 2 and 8 , the casing 10 is provided with a fourth annular groove 42 correspondingly. The fourth annular rib 11 is adapted to the groove 42 . Through the cooperation of the fourth annular groove 42 and the fourth annular convex rib 11 , the housing 10 can further position the main gear 40 .

Further preferably, referring to FIG. 2 and FIG. 8 , the inner side of the fourth annular rib 11 is also provided with a number of strip-shaped ribs 12 , and the strip-shaped ribs 12 are tightly pressed against the main gear 40 , and are used to further enhance the main gear 40 . positioning.

As a preferred embodiment, referring to FIG. 2 , the casing 10 is provided with a hollow column 13 , and referring to FIG. 7 , a solid column 54 adapted to the hollow column 13 is provided on the corresponding position of the base 50 . A through hole 21 is provided which is adapted to the solid post 54 . The circuit board 20 is sleeved outside the solid column 54 through the through hole 21 , which can realize the positioning of the circuit board 20 ;

As a preferred embodiment, referring to FIG. 2 and FIG. 7 , the casing 10 is provided with a card slot 14 , and the base 50 is provided with a buckle 55 adapted to the card slot 14 . Through the cooperation of the card slot 14 and the buckle 55 , the casing 10 and the base 50 are snap-fitted and fixed, so as to realize the positioning of the circuit board 20 , the measuring gear 30 and the main gear 40 .

Through the detailed description of the above embodiment, it can be understood that the present invention realizes the positioning of the measuring gear 30 and the main gear 40, and the measuring gear 30 can be positioned through the circuit board 20, the casing 10 and the base 50, and no longer needs to be The use of pressure plates or other auxiliary limiting components saves production costs, and at the same time, the installation process is simple and man-hours for assembly are saved. In addition, the positioning accuracy is good and the product output accuracy is high.

The above-mentioned embodiments are only preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (9)

1. A steering angle sensor, characterized in that the steering angle sensor comprises: a casing, a base, a circuit board and a measuring gear; a first annular groove is provided in the base; a first annular rib that fits into the annular groove, the measuring gear is arranged in the base through the first annular rib; the circuit board abuts against the measuring gear relative to the base The other end face of the casing is fixedly connected with the base, and is enclosed on the outside of the circuit board and the measuring gear. 2 . The steering angle sensor according to claim 1 , wherein the base is further provided with a circular groove, the measuring gear is provided with a boss adapted to the circular groove, and the boss is provided with the circular groove. 3 . arranged in the circular groove. 3 . The steering angle sensor according to claim 1 , wherein a second annular rib is further provided on the end surface of the measuring gear relative to the circuit board, and the circuit board abuts against the second annular rib. 4 . on the annular rib. 4 . The steering angle sensor according to claim 1 , wherein the steering angle sensor further comprises a main gear, and one end surface of the main gear is provided with a third annular groove. 5 . 5 . The steering angle sensor according to claim 4 , wherein the base is further provided with a third annular rib adapted to the third annular groove, and the main gear passes through the third annular groove. 6 . Three annular grooves are arranged in the base. 6 . The steering angle sensor according to claim 4 , wherein a fourth annular groove is provided on the end surface of the main gear relative to the casing, and a fourth annular groove is arranged in the casing. 7 . a fourth annular rib matched with the groove; the casing is pressed against the main gear through the fourth annular rib. 7 . The steering angle sensor according to claim 6 , wherein the inner side of the fourth annular convex rib is further provided with a plurality of strip-shaped convex ribs, and the strip-shaped convex ribs are tightly pressed against the main gear. 8 . . 8 . The steering angle sensor according to claim 1 , wherein the housing is provided with a hollow column, the base is provided with a solid column adapted to the hollow column, and the circuit board is provided with a solid column. There are through holes matched with the solid column; the circuit board is sleeved outside the solid column through the through hole, and the solid column is sleeved inside the hollow column. 9 . The steering angle sensor according to claim 1 , wherein a card slot is provided inside the casing, a snap button is arranged outside the base, and the casing and the base pass through the card slot and the base. 10 . The buckle realizes the snap-fit and fixation.