# US 2013/0154625 A1 · Device for measuring bending angle of constant velocity joint of drive shaft > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154625 A1 - Document ID: US20130154625A1 - Status: Published application - Kind: A1 - Application number: 13/472,107 - Filed: 2012-05-15 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Hyundai Motor Company - Inventors: Won Jun Choi; Yong Joo Kim; Jang Ho Kim; Seong Ki Ha - Web page: https://patentgrep.com/patent/US20130154625A1 ## CPC - F16D 3/223: the rolling members being guided in grooves in both coupling parts - G01B 7/30: for measuring angles or tapers; for testing the alignment of axes - F16D 2300/18: Sensors; Details or arrangements thereof - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS ## Abstract Provided is a device for measuring a bending angle of a constant velocity joint of a drive shaft, the device including an outer race provided at a drive shaft and having an opening part formed at one end thereof, a permanent magnet mounted in the opening part of the outer race, and a sensor provided on an outer peripheral surface of the drive shaft and interlocking with the permanent magnet to measure a bending angle between the drive shaft and the outer race. Therefore, a size and a direction of the bending angle between the drive shaft and the outer race may be measured, thereby making it possible to improve marketability and stability of a vehicle. ## Claims ### Claim 1 A device for measuring a bending angle of a constant velocity joint of a drive shaft, the device comprising: an outer race provided at the drive shaft and having an opening part formed at one end thereof to receive an end of the drive shaft therein; a permanent magnet mounted to the outer race in the opening part thereof; and a sensor provided on an outer peripheral surface of the drive shaft and interlocking with the permanent magnet to measure the bending angle between the drive shaft and the outer race. ### Claim 2 (depends on 1) The device according to claim 1, wherein the sensor is provided in plural. ### Claim 3 (depends on 1) The device according to claim 1, further comprising a controller connected to the sensor to analyze a size and a direction of the bending angle between the drive shaft and the outer race measured through the sensor. ### Claim 4 (depends on 1) The device according to claim 1, wherein the permanent magnet has a distal end with a curved shape to have an angle toward the center of the drive shaft to concentrate a magnetic field toward the sensor. ### Claim 5 (depends on 4) The device according to claim 4, wherein a distal end of the sensor is curved. ### Claim 6 A device for measuring a bending angle of a constant velocity joint of a drive shaft, the device comprising: an outer race provided at the drive shaft and having an opening part formed at one end thereof to receive an end of the drive shaft therein; a permanent magnet mounted on an outer peripheral surface of the drive shaft; and a sensor mounted on the outer race and interlocking with the permanent magnet to measure the bending angle between the drive shaft and the outer race. ### Claim 7 (depends on 6) The device according to claim 6, wherein the sensor is provided in plural. ### Claim 8 (depends on 6) The device according to claim 6, further comprising a controller connected to the sensor to analyze a size and a direction of the bending angle between the drive shaft and the outer race measured through the sensor. ### Claim 9 (depends on 6) The device according to claim 6, wherein the permanent magnet has a distal end with a curved shape toward the sensor to concentrate a magnetic field toward the sensor. ### Claim 10 (depends on 9) The device according to claim 9, wherein a distal end of the sensor is curved. ### Claim 11 A device for measuring a bending angle of a constant velocity joint of a drive shaft, the device comprising: an outer race provided at the drive shaft and having an opening part formed at one end thereof to receive a distal end of the drive shaft therein; a permanent magnet mounted in the outer race; and a sensor provided at the distal end of the drive shaft and interlocking with the permanent magnet to measure the bending angle between the drive shaft and the outer race. ### Claim 12 (depends on 11) The device according to claim 11, wherein the sensor is provided in plural. ### Claim 13 (depends on 11) The device according to claim 11, further comprising a controller connected to the sensor to analyze a size and a direction of the bending angle between the drive shaft and the outer race measured through the sensor. ### Claim 14 (depends on 11) The device according to claim 11, wherein a yoke is mounted in the permanent magnet to concentrate a magnetic field toward the sensor. ### Claim 15 A device for measuring a bending angle of a constant velocity joint of a drive shaft, the device comprising: an outer race provided at the drive shaft and having an opening part formed at one end thereof to receive a distal end of the drive shaft therein; a permanent magnet provided at the distal end of the drive shaft; and a sensor mounted in the outer race and interlocking with the permanent magnet to measure the bending angle between the drive shaft and the outer race. ### Claim 16 (depends on 15) The device according to claim 15, wherein the sensor is provided in plural. ### Claim 17 (depends on 15) The device according to claim 15, further comprising a controller connected to the sensor to analyze a size and a direction of the bending angle between the drive shaft and the outer race measured through the sensor. ### Claim 18 (depends on 15) The device according to claim 15, wherein a yoke is mounted in the permanent magnet to concentrate a magnetic field toward the sensor.