Steering wheel angle sensor

Abstract

The utility model discloses a steering wheel angle sensor which comprises a sensor body (1), a fixing seat (2) is arranged on the outer side of the sensor body (1), and a protective edge (3) attached to the outer side wall of the sensor body (1) is arranged on the outer side of the fixing seat (2). A fixed cylinder (4) corresponding to the central through groove of the sensor main body (1) is arranged on the outer side of the fixed seat (2), and a ring cylinder (5) for mounting a set screw is arranged on the circumferential surface of the fixed cylinder (4); a plurality of square notches (6) are evenly formed in the protection edge (3), and a plurality of protruding blocks (7) matched with the square notches (6) are arranged on the outer side of the sensor body (1). The protection structure is arranged on the outer side of the sensor main body, so that the influence of vibration on the sensor main body when a vehicle runs is reduced, and the sensor main body is kept in a stable state.

Description

Technical Field

[0001] This utility model relates to the field of steering wheel angle sensors, and in particular to a steering wheel angle sensor. Background Technology

[0002] As a key component of the vehicle steering system, the steering wheel angle sensor is described in, for example, by Chinese invention patent CN112758182A, which discloses a method for facilitating the installation of a steering wheel angle sensor. This sensor includes a sensor body, a tray, and an intermediate bushing. The intermediate bushing is installed at the center of the sensor body. The tray is fixed to the outside of the sensor body. Limiting components and fixing components are provided around the tray body. The limiting components include a first limiting member, a second limiting member, a third limiting member, a fourth limiting member, a fifth limiting member, and a sixth limiting member. The fixing components include a first fixing member and a second fixing member. The first fixing member is located between the first and second limiting members, and the second fixing member is located between the third and fourth limiting members. This type of angular sensor mainly achieves stable installation of the sensor body by setting limit point structures. However, during vehicle operation, the angular sensor is extremely susceptible to vibration and impact. Since no protective measures are set for the sensor body, this may cause the sensor to loosen or shift, thereby affecting its accuracy and stability. In addition, if the structural strength of the mounting bracket or fastener is insufficient, the sensor body may also be damaged or displaced, ultimately affecting its function and accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a steering wheel angle sensor. This invention reduces the impact of vehicle vibrations on the sensor body by providing a protective structure on the outside of the sensor body, thus maintaining the sensor body in a stable state.

[0004] The technical solution of this utility model is as follows: A steering wheel angle sensor includes a sensor body, a fixing seat on the outer side of the sensor body, and a protective edge on the outer side of the fixing seat that fits against the outer wall of the sensor body; a fixing cylinder on the outer side of the fixing seat that corresponds to the central through groove of the sensor body, and an annular cylinder for installing a set screw on the circumferential surface of the fixing cylinder; a plurality of square slots are evenly provided on the protective edge, and a plurality of protrusions that fit into the square slots are provided on the outer side of the sensor body, with an arc-shaped piece at the outer end of the protrusion that fits against the outer side of the protective edge.

[0005] In the aforementioned steering wheel angle sensor, multiple ribs are evenly provided between the circumferential surface of the fixed cylinder and the fixed seat.

[0006] In the aforementioned steering wheel angle sensor, a silicone damping pad that is in close contact with the sensor body is provided inside the mounting base and around the inner port of the mounting cylinder.

[0007] In the aforementioned steering wheel angle sensor, the mounting base has multiple hollow areas, and a fixed support rod is provided within the hollow areas. Multiple axial flow fans are provided on the fixed support rod.

[0008] In the aforementioned steering wheel angle sensor, the annular cylinder is provided with an elastic element for displacement compensation.

[0009] In the aforementioned steering wheel angle sensor, a wire harness slack groove is provided on one surface of the sensor body to facilitate the placement of the wire harness.

[0010] In the aforementioned steering wheel angle sensor, the inner wall of the fixed cylinder has a raised strip for limiting the rotation of the fixed cylinder.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. In this utility model, the sensor body is embedded in the fixing base, and the protrusion on the side of the sensor body is inserted into the square slot on the protective edge. The arc-shaped piece is in close contact with the outer side of the protective edge. The fixing cylinder is adapted to the drive shaft of the steering wheel. The set screw is screwed into the ring cylinder to fix the fixing base and the sensor body. By setting the protective structure, the sensor body is well protected, the impact of vehicle vibration on the sensor body is reduced, and the working accuracy and stability of the sensor are ensured.

[0013] 2. A silicone damping pad is provided inside the fixed base and around the inner port of the fixed cylinder, which is in close contact with the sensor body. When the steering wheel vibrates, the silicone damping pad can dynamically absorb the vertical vibration energy, improve the vibration resistance, and further reduce the adverse effects of vibration on the sensor body.

[0014] 3. The outer edge of the sensor body is the connection gap of the shell. By wrapping and fitting the protective edge, the sensor is protected from damage due to vibration and dust can be effectively prevented from entering through the sensor gap. This provides double protection for the stable operation of the sensor and effectively extends its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of a fixed cylinder;

[0017] Figure 3 This is a schematic diagram of the raised strip;

[0018] Figure 4 This is a schematic diagram of a silicone shock-absorbing pad.

[0019] The markings in the attached diagram are as follows: 1-Sensor body, 2-Fixed base, 3-Protective edge, 4-Fixed cylinder, 5-Ring cylinder, 6-Square slot, 7-Protrusion, 8-Arc-shaped piece, 9-Rib, 10-Silicone shock-absorbing pad, 11-Hollow area, 12-Fixed support rod, 13-Axial flow fan, 14-Elastic element, 15-Wire harness clearance slot, 16-Protrusion strip. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] Example: A steering wheel angle sensor includes a sensor body 1, and a mounting base 2 is installed on the outer side of the sensor body 1, as shown in the attached figure. Figure 1 As shown, the outer side of the mounting base 2 has a protective edge 3 that fits against the outer wall of the sensor body 1, and the protective edge and the mounting base are integrally formed; the outer edge of the sensor body is the connection gap of the shell, and the protective edge wraps and fits in place, which not only protects the sensor from damage due to vibration, but also effectively prevents dust from entering through the sensor gap, providing double protection for the stable operation of the sensor and effectively extending its service life. The outer side of the mounting base 2 has a fixing cylinder 4 that corresponds to the central through groove of the sensor body 1, as shown in the attached figure. Figure 2 As shown, the fixing cylinder 4 is fitted onto the drive shaft of the steering wheel. The circumferential surface of the fixing cylinder 4 has an annular cylinder 5 for installing a set screw. An elastic element 14 for displacement compensation is installed inside the annular cylinder 5. The elastic element is mainly a spring. Through the contact between the elastic element and the set screw, the preload generated by the elastic element compensates for its vibration displacement. Multiple ribs 9 are evenly distributed between the circumferential surface of the fixing cylinder 4 and the fixing seat 2. There are four ribs in total, arranged in a cross structure on the circumferential surface of the fixing cylinder. This can distribute the force on the sensor body during driving, reducing the impact of vehicle vibration and shaking on the sensor body, thus preventing the sensor body from falling off due to vibration. It also reduces the impact of vehicle vibration on the accuracy of sensor data during driving. The inner wall of the fixing cylinder 4 has a protruding strip 16 for limiting the rotation of the fixing cylinder 4, as shown in the attached figure. Figure 3 As shown, after the mounting bracket and sensor body are installed on the drive shaft of the steering wheel, the raised strip serves as a rotation limiter.

[0022] The protective edge 3 has multiple square slots 6 evenly distributed. The outer side of the sensor body 1 has multiple protrusions 7 that fit with the square slots 6. The outer end of the protrusions 7 has an arc-shaped piece 8 that fits against the outer side of the protective edge 3. The arc-shaped piece and the protrusions are an integral structure. Through the combination of the protrusions, the arc-shaped piece, and the square slots, a stable fit between the sensor body and the mounting base is achieved. The mounting base 2 has multiple hollow areas 11. The hollow areas are thinned around them, which allows the mounting base to fit better with the sensor body. The hollow areas do not affect the maintenance of the sensor body. The hollow areas 11 have fixed support rods 12. Multiple axial flow fans 13 are installed on the fixed support rods 12. The axial flow fans dissipate heat from the sensor body. The fan power cord is integrated into the sensor body wiring harness. A thermistor is integrated inside the sensor body. When the temperature exceeds 50°C, the fans automatically start, allowing the sensor body temperature to quickly return to normal. The sensor body 1 has a wire harness slack groove 15 on one surface for convenient wire harness placement, which facilitates the connection and placement of subsequent wire harnesses. The plug connected to the sensor body and the sensor housing are locked together by a snap-lock mechanism, which can be separated by pressing to unlock.

[0023] A silicone shock-absorbing pad 10, which is in close contact with the sensor body 1, is provided inside the fixing base 2 and around the inner port of the fixing cylinder 4, as shown in the attached figure. Figure 4 As shown, the center of the fixed base has an annular groove, and the annular protrusion of the silicone damping pad is embedded in the annular groove. When the steering wheel vibrates, the silicone damping pad can dynamically absorb the vertical vibration energy, improve the vibration resistance, and further reduce the adverse effects of vibration on the sensor body.

[0024] The working principle of this utility model is as follows: The sensor body 1 is embedded in the fixed base 2. The protrusion 7 on the side of the sensor body 1 is inserted into the square groove 6 on the protective edge 3. The arc-shaped piece 8 at the outer end of the protrusion 7 is in close contact with the outer side of the protective edge 3, thereby achieving a preliminary stable fit between the sensor body and the fixed base. Then, the fixed cylinder 4 on the outer side of the fixed base 2 is put on the drive shaft of the steering wheel. The protrusion strip 16 on the inner wall of the fixed cylinder 4 plays a rotation limiting role to prevent the fixed cylinder 4 from rotating relative to the drive shaft. Then, the set screw is screwed into the ring cylinder 5. Since the ring cylinder 5 is provided with an elastic element 14, the preload generated by the elastic element 14 can compensate for the displacement caused by vibration, further ensuring that the fixed base 2 and the sensor body 1 are stably installed on the drive shaft.

[0025] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. Furthermore, in these embodiments, "up," "down," "left," "right," "front," and "back" represent relative positions only, not absolute positions. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A steering wheel angle sensor, comprising a sensor body (1), characterized in that: The sensor body (1) is provided with a fixing seat (2) on the outside, and a protective edge (3) is provided on the outside of the fixing seat (2) to fit against the outer wall of the sensor body (1); a fixing cylinder (4) is provided on the outside of the fixing seat (2) to correspond to the central through groove of the sensor body (1), and a ring cylinder (5) for installing a set screw is provided on the circumferential surface of the fixing cylinder (4); a plurality of square slots (6) are evenly provided on the protective edge (3), and a plurality of protrusions (7) that fit into the square slots (6) are provided on the outside of the sensor body (1), and an arc-shaped piece (8) that fits against the outside of the protrusion (7) is provided at the outer end of the protrusion (7).

2. The steering wheel angle sensor according to claim 1, characterized in that: Multiple ribs (9) are evenly provided between the circumferential surface of the fixed cylinder (4) and the fixed seat (2).

3. The steering wheel angle sensor according to claim 1, characterized in that: A silicone shock-absorbing pad (10) is provided inside the fixed base (2) and around the inner port of the fixed cylinder (4) and is in close contact with the sensor body (1).

4. The steering wheel angle sensor according to claim 1, characterized in that: The fixed base (2) has multiple hollow areas (11), and a fixed support rod (12) is provided in the hollow area (11). Multiple axial flow fans (13) are provided on the fixed support rod (12).

5. The steering wheel angle sensor according to claim 1, characterized in that: The ring cylinder (5) is provided with an elastic element (14) for displacement compensation.

6. The steering wheel angle sensor according to claim 1, characterized in that: The sensor body (1) has a wire harness slack groove (15) on one surface for convenient wire harness placement.

7. The steering wheel angle sensor according to claim 1, characterized in that: The inner wall of the fixed cylinder (4) has a raised strip (16) for limiting the rotation of the fixed cylinder (4).

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