Patent TW-201336631-A (TW)
Title: Direction switching brake assembly structure of ratchet wrench
Inventor: LIN TSUNG-TE
IPC: B25B13/48
Filed: 2012-03-02
Abstract: The present invention provides a direction switching brake assembly structure of ratchet wrench. The present invention is characterized in that the direction switching brake assembly comprises a gear, two shift type braking blocks, a switching component, a straight guiding surface, and a straight guiding edge, wherein the two shift type braking blocks are configured in the receiving slot of the ratchet wrench with an interval and symmetrical to each other, and both of the translation braking blocks comprises a locking end corresponding to the gear and a guiding end away from the gear, in which the locking end is configured with a teeth locking portion capable of being engaged with the annular tooth edge of the gear, and the guiding end is corresponding to an inner wall edge of the receiving slot. With such a structure configuration, the present invention employs the straight guiding surface configured on the inner wall edge of the receiving slot matching up with the straight guiding edges configured to the guiding ends of the two shift type braking blocks to make the engagement process between the shift type braking blocks and the gear being in a shifting state and can obtain wider contact area while the straight surfaces are abutted against each other during engagement; furthermore, the direction switching brake assembly of the ratchet wrench may achieve the advantages and practical progressivity of greatly enhancing the bearing strength in engagement and locking state, effectively preventing the occurrence of tooth releasing, and further reducing the wearing caused by the engagement of the direction switching brake assembly. The present invention provides a direction switching brake assembly structure of ratchet wrench. The present invention is characterized in that the direction switching brake assembly comprises a gear, two shift type braking blocks, a switching component, a straight guiding surface, and a straight guiding edge, wherein the two shift type braking blocks are configured in the receiving slot of the ratchet wrench with an interval and symmetrical to each other, and both of the translation braking blocks comprises a locking end corresponding to the gear and a guiding end away from the gear, in which the locking end is configured with a teeth locking portion capable of being engaged with the annular tooth edge of the gear, and the guiding end is corresponding to an inner wall edge of the receiving slot. With such a structure configuration, the present invention employs the straight guiding surface configured on the inner wall edge of the receiving slot matching up with the straight guiding edges configured to the guiding ends of the two shift type braking blocks to make the engagement process between the shift type braking blocks and the gear being in a shifting state and can obtain wider contact area while the straight surfaces are abutted against each other during engagement; furthermore, the direction switching brake assembly of the ratchet wrench may achieve the advantages and practical progressivity of greatly enhancing the bearing strength in engagement and locking state, effectively preventing the occurrence of tooth releasing, and further reducing the wearing caused by the engagement of the direction switching brake assembly.