KR200439157Y1 - Steering wheel angle sensing device - Google Patents

Abstract

The present invention relates to a steering wheel angle detection device, and a main gear that rotates in conjunction with the steering shaft of the vehicle; A first rotary gear and a second rotary gear interlocked with the main gear; A first magnetic body and a second magnetic body seated inside the first rotation gear and the second rotation gear and rotating at the same rotation ratio as the first rotation gear and the second rotation gear; A first sensing unit and a second sensing unit sensing a phase change of polarity due to rotation of the first magnetic body and the second magnetic body, respectively; A PCB substrate having various terminals and pins and including the first sensing unit and the second sensing unit; An upper housing; A lower housing including a main gear seating portion, which is a cylindrical space in which the main gear is seated, and a first rotary gear seating portion and a second rotary gear seating portion for allowing the first and second rotary gears to be seated thereon; Characterized in that.

As a result, the first and second rotary gears on which the magnetic bodies are seated can prevent the center of the first and second sensing parts from being displaced, thereby reducing the angle and angular velocity measurement error of the steering wheel and reducing the manufacturing cost. Can be saved.

Description

Steering Wheel Angle Sensor {STEERING WHEEL ANGLE SENSING DEVICE}

Figure 1a is an exploded perspective view of a conventional steering wheel angle detection device,

Figure 1b is a perspective view showing the gears and the gear seating inside the housing of the conventional steering wheel angle detection device,

Figure 2a is an exploded perspective view of the steering wheel angle detection device according to the present invention,

Figure 2b is a perspective view showing the gears and the gear seating inside the housing of the steering wheel angle detection device according to the present invention,

3 is a bottom view of the upper housing of the steering wheel angle sensing device according to the present invention.

* Description of the symbols for the main parts of the drawings *

20: main gear 22: first rotary gear

24: 2nd rotary gear 32: 1st magnetic body

34: second magnetic material 42: first detection unit

44: second detection unit 46: mounting portion through groove

50: PCB substrate 51: main gear mounting portion

52: first rotary gear seating part 54: second rotary gear seating part

61: upper housing 62: lower housing

65: flow preventing part 80: fixing part

The present invention relates to a steering wheel angle sensing device, and in particular, by integrating a rotary gear mounting portion in which a rotary gear is seated in a lower housing, thereby preventing the rotary gear on which the magnetic body is seated from shifting from the center of the sensing part, thereby preventing the angle of the steering wheel and The present invention relates to a steering wheel angle sensing device capable of reducing angular velocity measurement errors and reducing manufacturing costs.

In general, a steering device which is essentially applied to a vehicle is a device for switching a path and a driving direction of a vehicle according to a driver's request, and a steering wheel which is basically operated by the driver and in conjunction with the steering wheel. Steering shaft for transmitting the operating force (Steering shaft), and the steering wheel is installed on the steering shaft includes a steering wheel angle detection device for detecting the rotation angle, that is, the steering angle of the steering wheel.

In addition, the steering wheel angle detection device uses a magnetic force sensor for detecting the magnetic force of the magnetic material and the magnetic material to detect the rotation of the steering wheel.

Figure 1a is an exploded perspective view of a conventional steering wheel angle detection device.

Referring to FIG. 1A, a conventional steering wheel angle sensing device includes a main gear 120 connected to a steering shaft that transmits a manipulation force by interlocking with a steering wheel of a vehicle and two rotary gears 122 that rotate in cooperation with the main gear. 124 and the PCB (150) including the magnetic body (132, 134) and the sensing unit (142, 144) for sensing the phase change of the polarity of the magnetic material seated inside the rotary gear and the upper PCB board It consists of a rotary gear seat 170 is formed with a hole in which the rotary gears are seated, and the upper housing 161 and the lower housing 162 on which the components are mounted.

Here, the steering wheel angle detection device should not have a gap between the main gear and the rotating gear for accurate steering angle measurement, the center of the magnetic material should be located to match the center of the sensing unit.

However, the conventional steering wheel angle sensing device is provided as a separate structure in which a holder, which is a space in which the rotary gear is seated, is provided in the rotary gear seating portion 170 as shown in FIG. .

Here, the rotary gear seating portion 170 is located on the PCB substrate 150, wherein the magnetic body (132, 134) due to the tolerance generated between the rotary gear seating portion 170 and the PCB substrate 150. ) Has a problem that an error may occur in the measurement of the angle and the angular velocity of the steering wheel because the rotary gear is positioned to be offset from the center of the sensing units 142 and 144.

In addition, since the seating position of the rotary gear is deformed due to deformation and contraction generated during injection molding during the manufacturing of the rotary gear seating part, the gap between the main gear and the main rotary gear is generated so that the angle and the angular velocity of the steering wheel may be measured. There was a problem that an error may occur.

Accordingly, an object of the present invention is to integrate the rotary gear mounting portion in which the rotary gear is seated in the lower housing, thereby preventing the rotary gear on which the magnetic body is seated from being shifted from the center of the sensing part, thereby reducing the angle and angular velocity measurement error of the steering wheel. It is to provide a steering wheel angle detection device that can be.

In addition, a steering wheel angle sensing device for reducing the angle and angular velocity measurement error of the steering wheel by minimizing the gap between the main gear and the rotary gear by forming a rotary gear seating portion to engage the rotary gear at the same position as the main gear. To provide.

In addition, it is to provide a steering wheel angle sensing device that can reduce the manufacturing cost by integrating the rotary gear seating unit separately configured in the lower housing.

The object is in accordance with the present invention, the main gear that rotates in conjunction with the steering shaft of the vehicle; A first rotary gear and a second rotary gear interlocked with the main gear; A first magnetic body and a second magnetic body seated inside the first rotation gear and the second rotation gear and rotating at the same rotation ratio as the first rotation gear and the second rotation gear; A first sensing unit and a second sensing unit sensing a phase change of polarity due to rotation of the first magnetic body and the second magnetic body, respectively; A PCB substrate having various terminals and pins and including the first sensing unit and the second sensing unit; An upper housing; A lower housing including a main gear seating portion, which is a cylindrical space in which the main gear is seated, and a first rotary gear seating portion and a second rotary gear seating portion for allowing the first and second rotary gears to be seated thereon; Is achieved by a steering wheel angle sensor.

Here, the first rotary gear mounting portion and the second rotary gear mounting portion is formed in a cylindrical shape with a plurality of grooves in the longitudinal direction.

Preferably, the upper housing may further include a flow preventing portion for preventing the flow of the first magnetic material and the second magnetic material.

In addition, the first rotary gear and the second rotary gear may further include a fixing part for allowing the first magnetic body and the second magnetic body to be coupled and fixed.

On the other hand, the PCB substrate calculates the total rotation angle of the steering wheel based on the phase change of the polarity caused by the rotation of the first magnetic body and the second magnetic body detected by the first sensing unit and the second sensing unit.

The first sensing unit and the second sensing unit may be provided as an anisotropic magnetic resistor (AMR) sensor.

Preferably, the first detection unit and the second detection unit may be provided as a GMR (Giant Magnetic Resistor) sensor.

In addition, the first rotary gear and the second rotary gear may have different radii from each other, and interlock with the main gear to generate a sinusoidal signal having a different period when rotating.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2a is an exploded view of the steering wheel angle detection device according to the present invention, Figure 2b is a perspective view showing the seats and the gears seated on the steering wheel angle detection device according to the present invention.

2A and 2B, the steering wheel angle sensing device according to the present invention includes a main gear 20 that rotates in conjunction with a steering shaft of a vehicle and a first rotation that rotates in association with the main gear 20. The first rotary gear 22 and the second rotary gear 24 fixed to the gear 22 and the second rotary gear 24, the first rotary gear 22 and the second rotary gear 24, respectively. First sensing for sensing the phase change of the polarity caused by the rotation of the first magnetic material 32 and the second magnetic material 34 and the first magnetic material 32 and the second magnetic material 34 which rotates at the same rotation ratio as The unit 42 and the second sensing unit 44, various terminals and pins are provided, the PCB substrate 50 including the first sensing unit 42 and the second sensing unit 44, and an upper housing. Numerous protrusions are provided to allow the main gear seating portion 51 and the first rotating gear 22 and the second rotating gear 24 to be seated in a cylindrical space in which the 61 and the main gear 20 are seated.Generated consists of a first rotary gear receiving portion 52 and the second rotary gear receiving portion 54. The lower housing 62 that contains a.

Here, the main gear 20 is configured to rotate at the same rotation ratio as the rotation angle of the steering device in conjunction with the steering shaft (not shown) of the steering device to adjust the wheel of the vehicle.

The main gear 20 is provided to rotate in conjunction with the first rotary gear 22 and the second rotary gear 24.

That is, the main gear 20 is a case in which the gear mountain of the main gear 20 is coupled with the gear bone of the first rotary gear on the connection line between the main gear 20 shaft and the first rotary gear 22 shaft. On the connection line between the main gear 20 shaft and the second rotary gear 24 shaft, the gear bone of the main gear 20 is coupled to the gear mountain of the second rotary gear 24 to rotate.

On the other hand, when the gear shaft of the main gear 20 and the gear mountain of the first rotary gear 22 is coupled on the connecting line between the main gear 20 shaft and the first rotary gear 22 shaft, the main gear ( 20) The gear mountain of the main gear 20 seen on the connecting line between the shaft and the second rotary gear 24 shaft can be provided to rotate to be coupled to the gear bone of the second rotary gear 24.

In addition, the main gear 20 is coupled to the first rotary gear 22 and the second rotary gear 24 in the state of being seated on the main gear seating portion 51 formed in the lower housing 62 It is provided to be received in the lower housing (62).

The first rotary gear 22 is configured to allow the first magnetic body 32 to be seated therein.

That is, the inside of the first rotary gear 22 is also provided to be inclined so that one side of the inclined shape of the first magnetic body 32 is coupled.

Here, the first magnetic body 32 and the first rotary gear 22 may be provided to prevent the sliding in the vertical direction of the first magnetic body 32 by the frictional force of the inclined surface coupled.

The anti-slip means may include a protrusion-shaped fixing part 80 to prevent the flow by fixing the first magnetic body 32 in the first rotary gear 22.

Preferably, the fixing part 80 may be provided on two sides of the inner surface of the first rotary gear 22 in a vertical shape.

In addition, the first magnetic body 32 may be provided in a trapezoidal shape to prevent slippage of the magnetic body 32 without any other fixing means in the lower portion of the rotary gear.

The first rotary gear 22 is coupled to the first magnetic body 32, and the polarity (N pole, S pole) of the first magnetic body 32 generated by the rotation of the first rotary gear 22. The first sensor 42 detects a phase change.

Here, the first rotary gear 22 may be provided integrally with the first magnetic body 32, that is, the first rotary gear 22 may be provided as a magnetic material.

The first magnetic body 32 is coupled to the first rotary gear 22 and rotated at the same rotation ratio, and the first sensing unit 42 is caused by the phase change of the polarity (N pole, S pole) by this rotation. Is provided to detect magnetic changes in the.

That is, the first sensing unit 42 detects the phase change of the polarity (N pole, S pole) of the magnetic body due to the rotation of the first magnetic body 32.

The first magnetic body 32 may be coupled to various parts of the first rotary gear 22, and preferably, the first magnetic body 32 may be detected by the first sensing unit 42 provided on the PCB substrate 50. It can be coupled to the inside of the center of the first rotary gear 22 to facilitate.

Meanwhile, the first magnetic body 32 may be provided integrally with the first rotary gear 22.

The second rotary gear 24 is coupled to the main gear 20 to rotate in conjunction with, and is provided to rotate in the reverse direction of the rotation direction of the main gear 20.

The second rotary gear 24 is configured to allow the second magnetic material 34 to be seated inside the same as the first rotary gear.

Here, the second rotary gear 24 may include a projection-shaped fixing portion 80 to prevent the flow by fixing the second magnetic material 34 therein.

In addition, the second magnetic body 34 may be provided in a trapezoidal shape to prevent slippage of the magnetic body 34 without other fixing means at the bottom of the rotary gear.

The second magnetic body 34 is coupled to the second rotary gear 24 and rotates at the same rotation ratio, and the second sensing unit 44 is caused by the phase change of the polarity (N pole, S pole) by this rotation. Is provided to detect magnetic changes in the.

That is, the second sensing unit 44 detects a phase change of the polarity (N pole, S pole) of the magnetic body due to the rotation of the second magnetic body 34.

In addition, the second magnetic body 34 may be coupled to various parts of the second rotary gear 24, and preferably, the second magnetic body 34 may be detected by the second sensing unit 44 provided on the PCB substrate 50. It may be coupled to the lower portion of the second rotary gear 24 to facilitate.

On the other hand, the second magnetic material 34 may be provided integrally with the second rotary gear 24.

In addition, the first rotary gear 22 may have a different diameter than the second rotary gear 24, in this case, the rotation of the first magnetic body 32 coupled to the first rotary gear 22. Difference between the phase change of the polarity (N pole, S pole) and the phase change of the polarity (N pole, S pole) due to the rotation of the second magnetic material 34 coupled to the second rotary gear 24. By the PCB substrate 50 is provided to calculate the rotation angle of the steering wheel.

That is, when the first rotary gear 22 and the second rotary gear 24 rotate, the first rotary gear 22 and the second rotary gear 24 are respectively coupled to rotate at the same rotation ratio. The phases of the polarities (N pole and S pole) of the first magnetic body 32 and the second magnetic body 34 are changed to generate a sinusoidal signal.

Here, when the diameters of the first rotary gear 22 and the second rotary gear 24 are different from each other, a sinusoidal signal generated by the first magnetic body 32 and the second magnetic body 34 are generated. The sinusoidal signals have different periods, and the first sensing unit 42 and the second sensing unit 44 sense the sinusoidal signals, respectively, and the detected result is detected on the PCB substrate 50. It is provided to calculate the rotation angle of the steering wheel on the basis.

The first sensing unit 42 is provided on the PCB substrate 50 to be combined with the first rotating gear 22 seen when the first rotating gear 22 rotates to rotate the first magnetic body ( 32 is provided to detect the phase change of the polarity (N pole, S pole) by the rotation.

Here, the PCB substrate 50 is provided to calculate the total rotation angle of the steering wheel based on the detection result detected by the first detection unit 42.

The first sensing unit 42 may be provided in various types, and for example, may be provided as an anisotropic magnetic resistor (AMR) sensor or a giant magnetic resistor (GMR) sensor.

When the first detection unit 42 is provided with an anisotropic magnetic resistor (AMR) sensor, angle detection of 0.1 ° or more is possible, and when the first detection unit 42 is provided with a GMR sensor, more accurate angle detection is possible.

The second sensing unit 44 is provided on the PCB substrate 50 to be coupled to the second rotating gear 24 when the second rotating gear 24 is rotated to rotate the second magnetic body ( 34 is provided to detect the phase change of the polarity (N pole, S pole) by the rotation.

Here, the PCB substrate 50 is provided to calculate the total rotation angle of the steering wheel based on the detection result detected by the second detection unit 44.

The second sensing unit 44 may be provided in various kinds, for example, may be provided as an anisotropic magnetic resistor (AMR) sensor or a giant magnetic resistor (GMR) sensor.

When the second detection unit 44 is provided with an anisotropic magnetic resistor (AMR) sensor, angle detection of 0.1 ° or more is possible, and when the second detection unit 44 is provided with a GMR sensor, more accurate angle detection is possible.

The PCB board 50 is provided with various terminals and pins connected to the steering wheel angle sensing device, and includes the first sensing unit 42 and the second sensing unit 44.

Here, the PCB substrate 50 is accommodated in the housings 61 and 62, and is provided to detect a phase change of polarity (N pole, S pole) due to the rotation of the magnetic material.

In addition, the PCB substrate 50 has a polarity (N pole) due to rotation of the first magnetic body 32 and the second magnetic body 34 detected by the first sensing unit 42 and the second sensing unit 44. , S pole) may be provided to calculate the total rotation angle of the steering wheel based on the phase change.

The housings 61 and 62 are provided to accommodate the main gear 20, the first rotating gear 22, the second rotating gear 24, and the PCB substrate 50.

As shown in FIG. 2A, the housings 61 and 62 are provided in a detachable form so as to be constituted by a combination of the upper housing 61 and the lower housing 62.

In addition, the housings 61 and 62 may be provided in various shapes, and openings may be formed so that the steering shaft penetrates and rotates in the center thereof.

Here, the housings 61 and 62 may further include grooves through which wires connecting the PCB substrate 50 can pass.

 2A and 2B, the lower housing 62 has a main gear seat 51, which is a cylindrical space in which the main gear 20 is seated in an opening through which the steering shaft penetrates. The first rotary gear mounting portion 52 and the second rotary gear mounting portion for allowing the first rotary gear 22 and the second rotary gear 24 to be seated on a portion where the PCB substrate 50 is seated. A portion 54 is formed.

Here, the first rotary gear seating portion 52 and the second rotary gear seating portion 54, the rotary gear seating portion 170 in the conventional steering wheel angle sensing device as shown in Figure 1a and 1b. Is a separate structure that may occur when the tolerance is formed between the rotary gear seating portion 170 and the PCB substrate 150 may be generated when seated on the PCB 150 and the production of the rotary gear seating portion 170 The first rotary gear 122 and the second rotary gear 124 are located off the center of the first sensing unit 142 and the second sensing unit 144 by the influence of the injection deformation and contraction, etc. It is possible to prevent the angle measurement error of the steering wheel that may occur.

Here, the first rotary gear mounting portion 52 and the second rotary gear mounting portion 54 has a cylindrical shape so that the first rotary gear 22 and the second rotary gear 24 can be seated and rotated. Is formed.

In addition, the first rotary gear mounting portion 52 and the second rotary gear mounting portion 54 pass through the PCB substrate 50 on which the first sensing portion 42 and the second sensing portion 44 are seated. In order to be able to do so, as shown in FIG. 2A, a plurality of grooves are formed in the cylindrical shape.

Here, the mounting part through-groove 46 corresponding to the first rotary gear seat 52 and the second rotary gear seat 54 of the shape is formed in the PCB substrate 50.

In addition, the first rotary gear mounting portion 52 and the second rotary gear mounting portion 54 is the first rotary gear 22 and the second rotary gear 24 is interlocked with the main gear 20. It is provided to be rotatable.

Therefore, the first rotary gear 22 and the second rotary gear 24 should be positioned to engage at the same position as the main gear, for this purpose, the first rotary gear mounting portion 52 and the second rotary gear mounting The portion 54 is configured to form the same height as the main gear seating portion 51 with respect to the bottom surface of the lower housing 62.

In addition, the first rotary gear 22 and the second rotary gear 24 may be provided with a different diameter from each other, in this case, the first rotary gear seating portion 52 and the second rotary gear seating portion 54 may be provided in cylindrical shapes of different diameters.

On the other hand, the upper housing 61, as shown in Figure 3, may include a flow preventing portion 62 for preventing the flow of the first magnetic material 32 and the second magnetic material (34). .

The flow preventing part 62 is provided in the upper housing 61, and is provided to prevent the flow of the first magnetic body 32 and the second magnetic body 34.

Here, the flow preventing part 62 is provided on the bottom surface of the upper housing 61, as shown in Figure 4 or 5 coupled to the upper surface of the first magnetic body 32 and the second magnetic body 34. The first magnetic body 32 and the second magnetic body 34 may be provided to prevent a vertical flow of the first magnetic body 32 and the second magnetic body 34.

As described above, the steering wheel angle detection device according to the present invention, thus, by integrating the rotary gear mounting portion on which the rotary gear is seated in the lower housing, thereby preventing the magnetic rotation of the rotating gear on which the magnetic body is seated from the center of the detection unit The steering wheel angle and angular velocity measurement errors can be reduced.

In addition, the steering wheel angle detection device according to the present invention, by forming the rotary gear seating portion so that the rotary gear is engaged at the same position as the main gear to minimize the gap between the main gear and the rotary gear angle and angular velocity Measurement error can be reduced.

In addition, the steering wheel angle detection device according to the present invention, by integrating the rotary gear seating unit configured separately, it is possible to reduce the manufacturing cost.

Claims (8)

A main gear 20 rotating in association with a steering shaft of the vehicle; A first rotary gear 22 and a second rotary gear 24 which rotate in synchronization with the main gear; The first magnetic body 32 and the second magnetic body that is rotated at the same rotation ratio as the first rotary gear 22 and the second rotary gear 24 seated inside the first rotary gear 22 and the second rotary gear ( 34); A first sensing unit 42 and a second sensing unit 44 for sensing a phase change in polarity due to rotation of the first magnetic body 32 and the second magnetic body 34, respectively; Various types of terminals and pins, and a PCB substrate 50 including the first sensing unit 42 and the second sensing unit 44; An upper housing 61; A first gear mounting portion 52 which allows the main gear seating portion 51, the first gear 22 and the second gear 24 to be seated, a cylindrical space in which the main gear is seated; A steering wheel angle sensing device comprising a; lower housing 62 is formed with a second rotary gear seating portion (54). The method of claim 1, Steering wheel angle sensing device, characterized in that the first rotary gear seating portion 52 and the second rotary gear seating portion (54) is formed in a cylindrical shape with a plurality of grooves in the longitudinal direction. The method according to claim 1 or 2, The upper housing (61) further comprises a steering wheel angle sensing device for preventing the flow of the first magnetic body (32) and the second magnetic body (34). The method according to claim 1 or 2, The first rotary gear 22 and the second rotary gear 24 further include a fixing part 80 to allow the first magnetic body 32 and the second magnetic body 34 to be coupled and fixed. Steering wheel angle sensor. The method according to claim 1 or 2, The PCB substrate 50 is based on the phase change of the polarity caused by the rotation of the first magnetic body 32 and the second magnetic body 34 sensed by the first sensing unit 42 and the second sensing unit 44. Steering wheel angle sensing device, characterized in that for calculating the total rotation angle of the steering wheel. The method of claim 5, wherein The first sensing unit 42 and the second sensing unit 44 are steering wheel angle sensing device, characterized in that provided as an AMR (Anisotropic Magnetic Resistor) sensor. The method of claim 5, wherein The first sensing unit 42 and the second sensing unit 44 are steering wheel angle sensing device, characterized in that provided with a GMR (Giant Magnetic Resistor) sensor. The method according to claim 6 or 7, The first and second rotary gears 22 and 24 have a different radius from each other, and are interlocked with the main gear 20 to generate a sinusoidal signal having a different period from each other during rotation. Wheel angle sensor.

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