| 摘要 |
A power screwdriver overload prevention means (100), which is arranged between an input drive part (110) and an output drive part (102, 121) and which interrupts the transmission of torque between the input drive part (110) and the output drive part (102, 121) when a threshold torque is exceeded, is characterized in that the input drive part (110) has at least one ring of balls (130) that is arranged in a rotationally fixed manner in the input drive part, in that the output drive part (102, 121) has at least one ring of balls (140; 141, 142) that is arranged in a rotationally fixed manner in the output drive part (102, 121), and in that the ring of balls (130) that is arranged in the input drive part (110) is spring-preloaded via the ring of balls (140; 141, 142) arranged in the output drive part (102, 121) such that the balls (130) of the input drive part (110) are located in each case between two balls (140; 141, 142) of the output drive part (102, 121) and thus transmit a torque, and such that, when the threshold torque is exceeded, the balls (130) of the input drive part (110) roll over the balls (140; 141, 142) of the output drive part (102, 121) and thus interrupt the transmission of torque. |
| 主权项 |
1. A power screwdriver overload prevention device, which is arranged between an input drive part and an output drive part and which interrupts the transmission of torque between the input drive part and the output drive part when a threshold torque is exceeded, wherein the input drive part comprises at least one ring of balls which is arranged in a torsion-proof manner in the input drive part, the output drive part comprises at least one ring of balls which is arranged in a torsion-proof manner in the output drive part, and the ring of balls which is arranged in the input drive part lies in a spring-preloaded manner above the ring of balls arranged in the output drive part in such a way that the balls of the input drive part are respectively located between two balls of the output drive part and thus transmit a torque, and when the threshold torque is exceeded the balls of the input drive part roll over the balls of the output drive part and thus interrupt the transmission of torque,
wherein two rings of balls on the output drive side or input drive side which are concentrically located inside each other are situated opposite a ring of balls on the output drive side or input drive side in such a way that the balls of the ring of balls on the input drive side or output drive side are situated between the concentric rings, and wherein an axial alignment of the input drive part on the output drive part can be realized by avoiding a radial bearing in that the balls of the ring of balls on the input drive side or output drive side are situated between the concentric rings. |
