KR101180562B1 - Manifold sensing apparatus for steering - Google Patents

Abstract

Disclosed is a steering composite sensing device. Since the magnetic flux generated in the magnet of the steering angle sensing device does not interfere with the magnetic flux generated in the magnet of the steering torque sensing device, the steering complex sensing device can accurately sense the amount of magnetic flux generated in the magnet of the steering angle sensing device. . Therefore, since there is no error in the measured steering angle, the reliability of the product is improved.

Description

Steering composite sensing device {MANIFOLD SENSING APPARATUS FOR STEERING}

1 is a perspective view of a steering complex sensing device according to an embodiment of the present invention.

Figure 2 is a perspective view of the bottom portion of the combined portion of FIG.

3A and 3B are views illustrating magnetic flux changes of the first and second magnets of the steering angle sensing device.

Description of the Related Art [0002]

110,210: 1st and 2nd case 130: stator

140,241,245: 1,2,3 magnets

220: main gear 231,235: 1st and 2nd auxiliary gear

310: microcomputer 320: input shaft

330: output shaft

The present invention relates to a compound sensing device for steering.

The vehicle power steering system is a device for changing the direction of the steering wheel in order to change the running direction of the driving vehicle. Since the steering degree of the driving vehicle is utilized as data for controlling the vehicle, the steering degree and the steering angle are sensed to detect the steering degree of the vehicle.

Steering composite sensing device refers to a device for sensing the steering angle and steering torque of the vehicle.

The steering angle sensing device and the steering torque sensing device of the conventional steering composite sensing device sense the change of the magnetic flux according to the rotation of the magnet to sense the steering angle and the steering torque. At this time, the magnetic flux generated from the magnet of the relatively small steering angle sensing device is interrupted by the magnetic flux generated from the magnet of the relatively large steering torque sensing device, which causes the magnetic flux generated from the magnet of the steering angle sensing device. The amount cannot be sensed accurately. Therefore, an error occurs in the measured steering angle, which has the disadvantage of lowering the reliability of the product.

The present invention has been made to solve the above problems of the prior art, an object of the present invention is to provide a steering composite sensing device for improving the reliability of the product by suppressing the interference between the magnetic flux generated in the magnet. have.

Steering composite sensing device according to the present invention for achieving the above object, the first case, the first magnet is installed inside the first case and coupled to the input shaft to rotate the same as the input shaft, the first magnet A steering torque sensing device having a stator installed inside the first case in a wrapping form and coupled to an output shaft connected to the input shaft using a torsion bar as a medium, the stator rotating the same as the output shaft and causing a change in the magnetic field between the magnet. ; The first and second sub-gear having a main gear that rotates together with the output shaft, different gear ratios that rotate in conjunction with the main gear, and the first and second sub-gear respectively coupled to the first and second sub-gear A steering angle sensing device having a second and a third magnet respectively rotating together; And means for preventing the magnetic flux generated in the second and third magnets from being interfered by the magnetic flux generated in the first magnet.

Hereinafter, a steering complex sensing device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a steering complex sensing device according to an embodiment of the present invention, Figure 2 is a partial perspective bottom perspective view of FIG.

As shown, the steering complex sensing device according to the present embodiment includes a steering torque sensing device 100 and the steering angle sensing device 200.

The steering torque sensing device 100 has a first case 110 having a predetermined space therein. The first case 110 has a cover 111 positioned at an upper side relative to a virtual vertical line and a lower case 115 positioned at a lower side thereof and having an upper plate open. First and second through holes 112 and 116 are formed in the lower plate of the cover 111 and the lower case 115, respectively.

Hereinafter, in referring to the surfaces of the components, the surface facing upward is referred to as the upper surface, and the surface facing downward is referred to as the lower surface, based on the virtual vertical line.

A cylindrical stator holder 120 is installed in the lower case 115, and the stator 130 is coupled to an upper surface and a lower surface of the stator holder 120, respectively.

Inside the stator 130, a ring-shaped first magnet 140 having a plurality of poles is disposed. The first magnet 140 has an inner circumferential surface coupled to the outer circumferential surface of the cylindrical magnet holder 150, and the outer circumferential surface faces the teeth 133 of the stator 130 at a predetermined interval.

The inner circumferential surface of the magnet holder 150 is coupled to the input shaft 320, which is the steering shaft side penetrating the first through hole 112 of the cover 111, the coupling tube 123 formed on the lower side of the stator holder 120 The output shaft 330 connected to the front wheel side of the vehicle, which is a steering wheel, is coupled. The coupling pipe 123 passes through the second through hole 116 of the lower case 115 and is exposed to the lower side of the first case 110. And, the steering wheel is connected to the input shaft 320 side, the input shaft 320 and the output shaft 330 is connected to the torsion bar (not shown) as a medium.

Thus, when the steering wheel is rotated by applying external force to the steering wheel, the input shaft 320 is rotated, and the magnet holder 150 and the first magnet 140 are rotated in the same manner as the input shaft 320. The output shaft 330 is rotated by receiving the rotational force of the input shaft 320 through the torsion bar, and also rotates the stator holder 120 and the stator 130 in the same manner as the output shaft 330.

However, since the output shaft 330 is connected to the front wheel in contact with the road, torque is generated in the torsion bar due to the frictional resistance between the road and the front wheel. The rotation angles of the first magnet 140 and the stator 130 are different according to the torque of the torsion bar, and the first magnet 140 according to the difference between the rotation angle of the first magnet 140 and the rotation angle of the stator 130. ) And the magnetic field caused between the stator 130 is different.

The magnetic field generated between the first magnet 140 and the stator 130 is detected by the first sensor 160 fixed to the lower case 115. Thus, the microcomputer 310 receives the strength of the magnetic field sensed by the first sensor 160, compares the received value with a set reference value, and measures torque, and the auxiliary operating force required for steering the vehicle according to the measured torque. To drive a motor or the like. The first sensor 160 is provided with a linear hall IC.

A collector 170 that concentrates a magnetic field is installed at a portion of the case 110 corresponding to the first sensor 160.

The steering angle sensing device 200 has a second case 210 having an upper plate opened and coupled to a lower plate of the lower case 115 of the first case 110. A third through hole 213 is formed in the lower plate of the second case 210, and the output shaft 330 is coupled to the inner circumferential surface of the coupling pipe 123 through the third through hole 213.

The main gear 220 is coupled to the outer circumferential surface of the coupling pipe 123 and rotates together with the stator holder 120. In order to firmly couple the main gear 220 and the coupling pipe 123, the protrusion 223 and the groove 123a are inserted into the inner circumferential surface of the main gear 220 and the outer circumferential surface of the coupling pipe 123.

The first auxiliary gear 231 meshes with and interlocks with the main gear 220, and the first auxiliary gear 231 meshes with and interlocks with the second auxiliary gear 235. At this time, the gear ratio of the first sub-gear 231 and the gear ratio of the second sub-gear 235 are formed different from each other, the gear ratio of the second sub-gear 235 is less than the gear ratio of the first sub-gear 231. Assume it is large. Then, when the main gear 220 rotates one turn, the first auxiliary gear 231 rotates more than the second auxiliary gear 235. The first and second auxiliary gears 231 and 235 are coupled to and supported by the lower case 115 of the first case 110.

The second and third magnets 241 and 245 are respectively coupled to the central side of the first and second auxiliary gears 231 and 235 so as to rotate in the same manner as the first and second auxiliary gears 231 and 235, respectively.

The second case 210 is provided with second and third sensors 251 and 555 to face the second and third magnets 241 and 245. The second and third sensors 251 and 255 sense the rotation angles of the second and third magnets 241 and 245 and transmit them to the microcomputer 310. The second and third sensors 251 and 255 are provided as Rotary Hall ICs.

A method of measuring the article angle using the steering angle sensing device according to the present embodiment will be described.

For steering of the vehicle, when the steering wheel is rotated, the main shaft 220 also rotates while the input shaft 320 → the torsion bar → output shaft 330 → stator holder 120 rotates. When the main gear 220 rotates, the main gear 220 rotates at different angular speeds in conjunction with the first sub-gear 231 and the first sub-gear 231 to rotate in conjunction with the main gear 220. Since the second auxiliary gear 235 also rotates, the second and third magnets 241 and 245 coupled to the first and second auxiliary gears 231 and 235 also rotate at different angular velocities.

Then, the second and third sensors 251 and 255 sense the rotation angles of the second and third magnets 241 and 245 and transmit them to the microcomputer 310, and the microcomputer 310 rotates the steering wheel through proper combination and calculation. Calculate the angle.

The first magnet 140 of the steering torque sensing device 100 is larger than the second and third magnets 241 and 245 of the steering angle sensing device 200. The first magnet 140 is located inside the stator holder 120, and the second and third magnets 241 and 245 are located outside the stator holder 120. As a result, the magnetic flux generated in the second and third magnets 241 and 245 is interfered by the magnetic flux generated in the first magnet 140.

The steering composite sensing device according to the present embodiment is provided with means for preventing the magnetic flux generated in the second and third magnets 241 and 245 from being interfered by the magnetic flux generated in the first magnet 140. The means is installed in the form of enclosing the second and third magnets 241 and 245, respectively, and is provided as a protective ring 350 of the magnetic material absorbing the magnetic flux generated in the first magnet 140.

3A and 3B are diagrams illustrating magnetic flux changes of the first and second magnets of the steering angle sensing device.

3A and 3B illustrate magnetic flux changes when the first magnet 140 of the steering torque sensing device 100 is rotated while the second and third magnets 241 and 245 of the steering angle sensing device 200 are fixed. The thick line is the magnetic flux change of the second and third magnets 241 and 245 of the steering complex sensing device according to the present invention, and the thin line is the magnetic flux change of the magnet of the conventional complex sensing device.

3A and 3B, the magnetic flux densities of the second and third magnets 241 and 245 according to the present invention are 5 to 14 and (−) 3 to 0, respectively, and the variation ranges are 9 and 3, respectively. The magnetic flux densities of the hybrid sensing device for steering are negative (-) 3-10 and 2.5-7.5, respectively, and the variation ranges are 13 and 5. Therefore, it can be seen that the magnetic flux density change widths of the second and third magnets 241 and 245 according to the present invention are reduced by 4 and 2, respectively, compared to the conventional magnets. This means that the magnetic flux generated in the second and third magnets 241 and 245 due to the protection ring 350 is less subjected to the interference of the magnetic flux generated in the first magnet 140.

As described above, in the steering composite sensing device according to the present invention, since the magnetic flux generated in the magnet of the steering angle sensing device is not affected by the magnetic flux generated in the magnet of the steering torque sensing device, the steering angle sensing device generates the magnetic flux. The amount of magnetic flux can be sensed accurately. Therefore, since there is no error in the measured steering angle, the reliability of the product is improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Of course.

Claims (17)

delete delete delete A steering torque sensing device for detecting a change in the magnetic field between the first magnet rotating in association with the rotation of the input shaft and the stator rotating together with the output shaft, and measuring torque applied between the input shaft and the output shaft; A first gear and a second auxiliary gear having a main gear that rotates in conjunction with the rotation of the output shaft, and second and third magnets that rotate in conjunction with the rotation of the main gear, and a magnetic field of the second and third magnets. A steering angle sensing device for sensing a speed and measuring the rotation speed of the output shaft through the rotation speed of the first and second auxiliary gears; And And a magnetic flux blocking unit to block a magnetic field of the first magnet from being transmitted to the second and third magnets. The method of claim 4, wherein the magnetic flux blocking unit, Steering composite sensing device interposed between the first magnet and the second and third magnets. The method of claim 4, wherein the magnetic flux blocking unit, Steering composite sensing device is installed in a position corresponding to the second and third magnets. The method of claim 4, wherein the magnetic flux blocking unit, Steering composite sensing device spaced apart from the second and third magnets that rotate in conjunction with the rotation of the first and second auxiliary gear. The magnetic flux blocking unit of any one of claims 4 to 7, Provided in the shape of a ring, the steering compound sensing device for the second and third magnets are arranged inside the through-hole formed in the center. The magnetic flux blocking unit of any one of claims 4 to 7, Steering composite sensing device provided with a magnetic flux absorbing member for absorbing the magnetic flux of the first magnet to be transmitted to the second and third magnets. The magnetic flux blocking unit of any one of claims 4 to 7, Steering composite sensing device provided with a magnetic material. The method of claim 4, wherein the steering torque sensing device, A first case comprising a cover and a lower case; A stator installed on the top and bottom surfaces of the stator holder installed in the lower case and rotating in conjunction with the rotation of the output shaft; A magnet holder connected to the input shaft and rotatably supporting the first magnet in conjunction with rotation of the input shaft; And And a first sensor installed at the lower case to sense a magnetic field of the first magnet. The method of claim 11, wherein the first sensor, Steering complex sensing device as a linear Hall IC. The method of claim 11, wherein the steering angle sensing device, A second case having an upper plate opened and coupled to a lower plate of the lower case of the first case; And And second and third sensors for detecting changes in the magnetic fields of the second and third magnets. The main gear and the first and second auxiliary gear is a steering composite sensing device installed in the second case. The method of claim 13, The main gear is gear-coupled with the first auxiliary gear, and the second sub-gear is gear-coupled with the first sub-gear, The first and second auxiliary gear is a steering compound sensing device having a different gear ratio. 15. The method of claim 14, The steering compound sensing device for rotating the first sub-gear more than the second sub-gear when the first gear is rotated. The method of claim 11, wherein The first and second auxiliary gears, the steering composite sensing device coupled to the lower case. The method of claim 13, wherein the second and third sensors, Steering composite sensing device provided with a Rotary Hall IC.

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