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    • 9. 发明申请
    • BIT ATTACHMENT DEVICE AND TIGHTENING MODULE
    • WO2021224402A1
    • 2021-11-11
    • PCT/EP2021/062021
    • 2021-05-06
    • ATLAS COPCO INDUSTRIAL TECHNIQUE AB
    • WUESTE, Michael
    • B25B21/02B25B23/00B25B23/04
    • The present utility model provides a bit attachment device and a tightening module. The bit attachment device comprises an attaching sleeve, a disassembling-attaching assembly and an abutting assembly arranged in sequence. A first end of the attaching sleeve is attached to a movable rod within the tightening module via a buffer assembly, so as to synchronize with movement of the movable rod. The disassembling-attaching assembly includes an attaching shaft whose first end forms a tight fit with a second end of the attaching sleeve via a spline structure, and the second end of the attaching shaft is attached to a bit. The abutting assembly can be movably provided at a position located on an outer periphery of the second end of the attaching sleeve, so that it can abut against the attaching shaft in a radial direction, or move toward a direction away from the attaching sleeve to loosen the attaching shaft, and with the above-mentioned buffer assembly, the impact force of the structure to be locked when the bolt is installed can be mitigated. In addition, the disassembling- attaching assembly connected with the bit and the attaching sleeve are connected by the spline structure, which enables the disassembling-attaching assembly to maintain a firmly installed state when the tightening module is in use while ensuring the ease of disassembly and assembly.