Abstract: A device and a method for automatically categorizing screwdriver bits are provided. The method includes three main steps: accommodating and mixing, vibration feeding, and type categorizing. The device includes a device body and a vibrating feeding cylinder disposed on the device body. The vibrating feeding cylinder includes a rotating holder for vibrating and moving the screwdriver bits and a directional mechanism for arranging the driving tips of the screwdriver bits facing the same direction. A CCD mechanism is disposed on the device body and is used to detect the shape of the driving tips of the screwdriver bits.

Abstract: A restriction device includes a bridge including a connection portion and a locking portion respective formed on two ends thereof. The connection portion includes a protrusion on the outside of the bridge. The protrusion is to be connected to one of the connection parts on the hub. The locking portion includes a tubular part on the inside of the bridge. The tubular part is located beyond the outer periphery of the hub. A space is formed between the inside of the bridge and the tubular part so as to accommodate the hub on the disk body when the protrusion is connected to one of the connection parts on the hub. The tubular part contacts one of two ends of the brake caliper to restrict rotation of brake disk.