A ratchet wrench head pivotally coupled to a control handle, comprising:
- a wrench head housing, integrally incorporating an upper transmission housing and a lower drive housing, wherein the upper transmission housing extends from front to back, housing a front opening, a transmission chamber, and a rear opening, the rear opening is designed with an annular inner surface having multiple positioning lugs along its inner circumference, and the lower drive housing is hollow and forms a drive chamber which communicates with the transmission chamber;
- a drive assembly, comprising a bevel gear shaft, multiple drive bearings, and a hollow retaining disc, wherein the bevel gear shaft integrates a vertical bevel gear and a drive shaft, the drive shaft is mounted within the drive bearings to facilitate rotation relative to the drive bearings, and the hollow retaining disc is positioned to secure around the lower boundary of the drive bearings;
- and
- a transmission assembly, comprising a front transmission assembly and a rear retention assembly, wherein the front transmission assembly consists of a driver head, a front cover ring, a transmission bevel gear, a front ratchet shaft, and a retaining ring, the driver head is laterally equipped with a guide slot, while the front cover ring is internally structured with an alignment groove, the transmission bevel gear consists of an integrally formed hollow shaft and a horizontal bevel gear, and the front ratchet shaft has front ratchet teeth at its end face and a lateral guide pin hole containing a guide pin;
- the driver head is inserted into the front ratchet shaft with the guide slot engaging the guide pin to facilitate axial sliding adjustments;
- the hollow shaft of the transmission bevel gear is positioned within the alignment groove of the front cover ring to allow controlled rotational motion;
- the front ratchet shaft is housed within the transmission bevel gear with the retaining ring mounted on the front ratchet shaft, pressing against the end surface of the transmission bevel gear to secure the assembly;
- and the rear retention assembly includes a rear ratchet ring, a rear cover ring, and a pressing spring, wherein the rear ratchet ring features rear ratchet teeth on one end and multiple alignment grooves along its periphery, the pressing spring, in a compressed and elastically responsive state, is situated between the rear ratchet ring and the rear cover ring, and the driver head of the front transmission assembly extends sequentially through the rear ratchet ring, the pressing spring, and the rear cover ring;
- wherein the transmission assembly is housed within the upper transmission housing of the wrench head housing, with the front cover ring secured at the front opening and the rear cover ring secured at the rear opening to ensure engagement between the front ratchet teeth of the front ratchet shaft and the rear ratchet teeth of the rear ratchet ring, while the pressing spring in the rear retention assembly provides a resilient engagement mechanism that enables clockwise rotation and restricts counterclockwise movement;
- the drive assembly is secured within the lower drive housing of the wrench head housing, with the hollow retaining disc anchored against the inner walls of the drive chamber, and the vertical bevel gear of the drive assembly meshes with the horizontal bevel gear of the transmission assembly to establish a mechanical linkage, wherein the bevel gear shaft selectively couples with the control handle to facilitate the torque transmission.