PRELOAD INSPECTION METHOD OF WHEEL BEARING DEVICE

• Main Author: BABA TOMOKO
• Format: Patent
• Language: English; Japanese
• Published: 10.03.2022
• Subjects: AXLES FOR WHEELS OR CASTORS; BEARINGS; BLASTING; CASTORS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INCREASING WHEEL ADHESION; LIGHTING; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLE WHEELS; VEHICLES IN GENERAL; WEAPONS

To provide a preload inspection method of a wheel bearing device which can further enhance reliability when determining the adaptability of a preload.SOLUTION: A preload inspection method comprises: a process S02 of pressure-inserting an inner ring 4 into a small-diameter step part 3a; a process S03 of calculating a first bearing preload value P1 on the basis of a negative clearance G1 in an axial direction; a process S05 of measuring post pressure-insertion rotation torque Ta; a process S06 of forming a caulking part 3h by caulking the small-diameter step part to the inner ring; a caulking processing degree measurement process S07 of measuring a height dimension h and an outside-diameter dimension r of the caulking part; a process S08 of measuring post-caulking rotation torque Tb; a process S09 of calculating a second bearing preload value P2 by adding a preload change amount ΔP based on differential torque ΔT to the first bearing preload value; a first determination process S10 of determining the adaptability of the preload by a determination whether or not the second bearing preload value is within a reference value; and a second determination process S11 of determining the presence or absence of a caulking abnormality by collating the height dimension, the outside-diameter dimension and a value of the differential torque.SELECTED DRAWING: Figure 2 【課題】予圧の適否を判定した際の信頼度をさらに高めることができる車輪用軸受装置の予圧検査方法を提供する。【解決手段】予圧検査方法は、内輪４を小径段部３ａに圧入する工程Ｓ０２と、軸方向負隙間Ｇ１に基づき第１の軸受予圧値Ｐ１を算出する工程Ｓ０３と、圧入後回転トルクＴａを測定する工程Ｓ０５と、小径段部を内輪に加締めて加締部３ｈを形成する工程Ｓ０６と、加締部の高さ寸法ｈおよび外径寸法ｒを測定する加締加工度測定工程Ｓ０７と、加締後回転トルクＴｂを測定する工程Ｓ０８と、差分トルクΔＴに基づいた予圧変化量ΔＰを第１の軸受予圧値に加えて第２の軸受予圧値Ｐ２を算出する工程Ｓ０９と、第２の軸受予圧値が基準値の範囲内であるか否かにより予圧の適否を判定する第１の判定工程Ｓ１０と、高さ寸法および外径寸法と差分トルクの値とを照合して加締異常の有無を判定する第２の判定工程Ｓ１１とを備える。【選択図】図２