Ratchet device and screwdriver
View Patent ↗The present invention discloses a ratchet device, cylindrical through holes are arranged at the center of the pawl base and switch-shift cover, the rod body passes through the cylindrical through hole of the pawl base and switch-shift cover, two oblique openings are arranged on the pawl base, a transverse slot is arranged on one side of the periphery of the pawl base, a ratchet base is arranged on the rod body, a ratchet is arranged at one end of the periphery of the ratchet base, the claw of the pawl engages with the ratchet of the ratchet base in an up-down way, a flange is arranged on the external of the pawl. The ratchet structure is configured to achieve the up-and-down motion on the vertical direction, which is convenient for users, easy to use, excellent in saving strength and in improving work efficiency.
1. A ratchet device, comprising a pawl base, a rod body, a pawl, a spring and a switch-shift cover, wherein, cylindrical through holes are arranged at the center of the pawl base and switch-shift cover, the rod body passes through the cylindrical through hole of the pawl base and switch-shift cover, two oblique openings are arranged on the pawl base, a transverse slot is arranged on one side of the periphery of the pawl base, a ratchet base is arranged on the rod body, a ratchet is arranged at one end of the periphery of the ratchet base, the claw of the pawl engages with the ratchet of the ratchet base in an up-down way, a flange is arranged on the external of the pawl, the pawl is inlayed in the oblique opening, a recess opening is arranged in the switch-shift cover, when the switch-shift cover is rotated, the recess opening of the switch-shift cover oppresses the flange, so that the spring is retracted by stress and the pawl moves downward, and the claw of the pawl is separated from the ratchet, the ratchet device will rotate clockwise or anti clockwise.
2. The ratchet device of claim 1 , wherein, the cylindrical through hole arranged at the center of the pawl base and the cylindrical though hole arranged at switch-shift cover are concentric.
3. The ratchet device of claim 1 , wherein, the spring is a symmetry bending bar-type spring.
4. The ratchet device of claim 1 , wherein, the inclined angle of the oblique opening is configured to enable the claw obliquely arranged on the pawl to engage with the ratchet of the ratchet base.
5. The ratchet device of claim 1 , wherein, the claw is obliquely arranged on the pawl in a certain angle.
6. The ratchet device of claim 1 , wherein, a shape of the pawl is matched with a shape of the oblique opening.
7. The ratchet device of claim 1 , wherein, a depth of the transverse slot is slightly larger than a width of the spring.
8. The ratchet device of claim 1 , wherein, the flange of the pawl is a cylinder structure.
9. A ratchet screwdriver, comprising a ratchet device having a pawl base, a rod body, a pawl, a spring and a switch-shift cover, wherein, cylindrical through holes are arranged at the center of the pawl base and switch-shift cover, the rod body passes through the cylindrical through hole of the pawl base and switch-shift cover, two oblique openings are arranged on the pawl base, a transverse slot is arranged on one side of the periphery of the pawl base, a ratchet base is arranged on the rod body, a ratchet is arranged at one end of the periphery of the ratchet base, the claw of the pawl engages with the ratchet of the ratchet base in an up-down way, a flange is arranged on the external of the pawl, the pawl is inlayed in the oblique opening, a recess opening is arranged in the switch-shift cover, when the switch-shift cover is rotated, the recess opening of the switch-shift cover oppresses the flange, so that the spring is retracted by stress and the pawl moves downward, and the claw of the pawl is separated from the ratchet, the ratchet device will rotate clockwise or anti clockwise.
10. The ratchet screwdriver of claim 9 , wherein, the cylindrical through hole arranged at the center of the pawl base and the cylindrical though hole arranged at switch-shift cover are concentric.
11. The ratchet screwdriver of claim 9 , wherein, the spring is a symmetry bending bar-type spring.
12. The ratchet screwdriver of claim 9 , wherein, the inclined angle of the oblique opening is configured to enable the claw obliquely arranged on the pawl to engage with the ratchet of the ratchet base.
13. The ratchet screwdriver of claim 9 , wherein, the claw is obliquely arranged on the pawl in a certain angle.
14. The ratchet screwdriver of claim 9 , wherein, a shape of the pawl is matched with a shape of the oblique opening.
15. The ratchet screwdriver of claim 9 , wherein, a depth of the transverse slot is slightly larger than a width of the spring.
16. The ratchet screwdriver of claim 9 , wherein, the flange of the pawl is a cylinder structure.