Assembling method and assembling device for hub bearing

An assembling method for a hub bearing including

• an outer ring having an inner peripheral surface on which a first outer raceway surface and a second outer raceway surface are formed,
• an inner ring having an outer peripheral surface on which a second inner raceway surface facing the second outer raceway surface is formed,
• a hub wheel integrally having a cylindrical portion having an outer peripheral surface on which a first inner raceway surface facing the first outer raceway surface is formed, and a flange that is provided on one side of the first inner raceway surface in an axial direction,
• a roller cassette including a plurality of tapered rollers that are interposed between the first outer raceway surface and the first inner raceway surface and a cage that holds the plurality of tapered rollers at predetermined circumferentially spaced intervals, and
• a seal member that seals an opening at one end of the outer ring in the axial direction, the assembling method comprising:
• a first step for obtaining a first assembly in which the outer ring, the hub wheel, and the roller cassette are combined;
• and
• a second step for obtaining a second assembly in which the first assembly and the seal member are combined,
• wherein, in the second step,
• the outer ring and roller cassette of the first assembly in a vertical orientation with the outer ring below the flange of the hub wheel are supported from below by a first support tool and the cylindrical portion of the hub wheel of the first assembly is supported from below by a second support tool that can be raised and lowered relative to the first support tool while being restricted from separating from the first support tool,
• then the second support tool is moved upward relative to the first support tool in accordance with the separation of the hub wheel from the first assembly that is in the vertical orientation, so that a cylindrical roller support surface provided on the second support tool is introduced to an inside of the roller cassette in a radial direction, and
• then, after the seal member is attached to the outer ring, the second support tool is moved downward relative to the first support tool in accordance with the re-insertion of the cylindrical portion of the hub wheel into an inner periphery of the outer ring, so that the first inner raceway surface is introduced to the inside of the roller cassette in the radial direction while the roller support surface is ejected below the roller cassette.