一种带脚轮的包，可独立站立并灵活移动。
专利摘要
一种主包(3)独立站立并通过四个角上的自由旋转脚轮(1)移动。自由旋转脚轮(1)设有轮子(6)、以允许轮子旋转的方式连接到轮子的轭(7)、外圈(8B)连接到轭的径向轴承(8)、连接到径向轴承内圈(8A)的旋转轴(9)、以及固定旋转轴上端的安装座(10)。轮子的旋转轴线(11)相对于作为旋转轴旋转中心的旋转轴线(m)偏心设置，允许轭旋转。轭和安装座在彼此相对的表面之间紧密靠近地建立有防弯间隙(15)。当弯曲冲击载荷作用于旋转轴时，轭和安装座在防弯间隙处相互挤压以支撑弯曲冲击力。
Original abstractA main bag ( 3 ) stands independently and moves via free swiveling caster wheels 1 at four corners. A free swiveling caster wheel ( 1 ) is provided with a wheel ( 6 ), a yoke ( 7 ) connected to the wheel in a manner allowing the wheel to rotate, a radial bearing ( 8 ) with its outer ring ( 8 B) connected to the yoke, a swivel shaft ( 9 ) connected to the inner ring ( 8 A) of the radial bearing, and a mount ( 10 ) which holds the upper end of the swivel shaft fixed. The rotation axis ( 11 ) of the wheel is disposed with eccentricity with respect to the swivel axis (m), which is the center of rotation of the swivel shaft, allowing the yoke to swivel. The yoke and mount have a bend prevention gap ( 15 ) established between mutually opposing surfaces in close proximity. When a bending impact load acts on the swivel shaft, the yoke and mount press against each other at the bend prevention gap to support the bending impact force.
专利附图（8）
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