# US 9,434,410 B2 · Apparatus for detecting torque and steering system having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,410 B2 - Document ID: US9434410B2 - Status: Granted - Kind: B2 - Application number: 13/577,390 - Filed: 2011-03-15 - Published: 2012-11-29 - Granted: 2016-09-06 - Earliest claimed: 2010-03-30 - Assignees: LG Innotek Co., Ltd. - Applicants: Changhwan Lee - Inventors: Changhwan Lee - Web page: https://patentgrep.com/patent/US9434410B2 ## CPC - B62D 6/10: characterised by means for sensing {or determining} torque - B62D 5/0457: {characterised by control features of the drive means as such} - G01L 3/104: {involving permanent magnets} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) ## Abstract The present invention relates to a torque measuring device including a stator arranged at an inner surface of a case housing, a magnet distantly arranged with the stator at a predetermined gap, a sensing unit detecting a magnetic field generated between the stator and the magnet, and a non-magnetic stator holder integrally formed with a stator fixture fixed by the stator and a shaft fixture fixed by a shaft, whereby manufacturing cost of the torque measuring device can be minimized, and defects generated in the course of manufacturing process can be minimized. ## Claims ### Claim 1 A torque measuring device, the torque measuring device comprising: a case housing a first case and a second case distantly interconnected with the first case; a stator holder disposed in the case housing; first and second stators each having a ring-shaped stator body and a plurality of stator teeth formed at an inner circumferential surface of the stator body; a magnet inserted into the stator holder, the magnet being respectively arranged in the first and second stators with a predetermined gap; and a sensing unit detecting a magnetic field generated between the first and second stators and the magnet; wherein the first stator is secured at one lateral surface of the stator holder, and the second stator is secured at another lateral surface of the stator holder; wherein the stator holder includes a stator fixture for coupling the first and second stators at opposite ends of the stator fixture; wherein a shaft fixture is extended from a lateral surface of the stator fixture; wherein the stator fixture and the shaft fixture are integrally formed with the stator holder; wherein the stator fixture is protrusively formed with two accommodation units, wherein each of the accommodation units accommodates each of the stator bodies at a distal end of a periphery of the corresponding stator body; wherein the stator fixture includes a plurality of insertion holes and wherein each of the plurality of insertion holes has a predetermined position for a stator tooth to be circumferentially inserted; and wherein each of the stator teeth of the first stator is meshed with a corresponding stator tooth of the second stator in the predetermined position through a corresponding one of the insertion holes. ### Claim 2 (depends on 1) The torque measuring device of claim 1, wherein the stator holder is formed with a non-magnetic metal material. ### Claim 3 (depends on 1) The torque measuring device of claim 1, wherein the stator fixture further includes tooth insertion holes distantly formed at a predetermined space in a peripheral direction of each of the accommodation units. ### Claim 4 (depends on 1) The torque measuring device of claim 1, wherein the stator holder is formed with an aluminum material. ### Claim 5 (depends on 1) The torque measuring device of claim 1, wherein the stator holder is formed with a zinc material. ### Claim 6 (depends on 1) The torque measuring device of claim 1, wherein the stator holder is formed with a non-magnetic metal compound. ### Claim 7 (depends on 1) The torque measuring device of claim 1, wherein the stator holder is manufactured by die casting method. ### Claim 8 (depends on 1) The torque measuring device of claim 1, wherein each of the stator bodies of the first and the second stator is formed with a plurality of fixing pins at a predetermined space. ### Claim 9 (depends on 8) The torque measuring device of claim 8, wherein each of the plurality of fixing pins is bent to be accommodated at a periphery of the stator holder. ### Claim 10 (depends on 1) The torque measuring device of claim 1, wherein the first and second cases are interconnected to have a space therebetween. ### Claim 11 A vehicular steering device, the vehicular steering device comprising: a first shaft connected to a steering wheel; a second shaft connected to the first shaft; a case housing a first case formed with a first through hole to pass the first shaft and a second case distantly interconnected with the first case and formed with a second through hole to pass the second shaft; a stator holder disposed in the case housing; first and second stators each having a ring-shaped stator body and a plurality of stator teeth formed at an inner circumferential surface of each stator body; a magnet inserted into the stator holder, the magnet being respectively arranged in the first and second stators with a predetermined gap; and a sensing unit disposed at an inner surface of the case housing and detecting a magnetic field generated between the first and second stators and the magnet; wherein the first stator is secured at one lateral surface of the stator holder, and the second stator is secured at another lateral surface of the stator holder; wherein the stator holder includes a stator fixture for coupling the first and second stators at opposite ends of the stator fixture; wherein a shaft fixture is extended from a lateral surface of the stator fixture; wherein the stator fixture and the shaft fixture are integrally formed with the stator holder; wherein the stator fixture is protrusively formed with two accommodation units, wherein each of the accommodation units accommodates each of the stator bodies at a distal end of a periphery of the corresponding stator body; wherein the stator fixture includes a plurality of insertion holes and wherein each of the plurality of insertion holes has a predetermined position for a stator tooth to be circumferentially inserted; and wherein each of the stator teeth of the first stator is meshed with a corresponding stator tooth of the second stator in the predetermined position through a corresponding one of the insertion holes. ### Claim 12 (depends on 11) The vehicular steering device of claim 11, wherein the stator holder is formed with a non-magnetic metallic material. ### Claim 13 (depends on 11) The vehicular steering device of claim 11, wherein the stator fixture further includes tooth insertion holes distantly formed at a predetermined space in a peripheral direction of each of the accommodation units. ### Claim 14 (depends on 11) The vehicular steering device of claim 11, wherein the stator holder is formed with an aluminum material. ### Claim 15 (depends on 11) The vehicular steering device of claim 11, wherein the stator holder is formed with a zinc material. ### Claim 16 (depends on 11) The vehicular steering device of claim 11, wherein the stator holder is formed with a non-magnetic metal compound. ### Claim 17 (depends on 11) The vehicular steering device of claim 11, wherein the stator holder is manufactured by die casting method. ### Claim 18 (depends on 11) The vehicular steering device of claim 11, wherein each of the stator bodies of the first and the second stator is formed with a plurality of fixing pins at a predetermined space. ### Claim 19 (depends on 18) The vehicular steering device of claim 18, wherein each of the plurality of fixing pins is bent to be accommodated at a periphery of the stator holder. ### Claim 20 (depends on 11) The vehicular steering device of claim 11, wherein the first and second cases are interconnected to have a space therebetween.