Built-in gear shifting fork device

The built-in gear shifting fork device comprises a box body, a rear cover plate is arranged on the side face of the upper portion of the box body, a shifting fork pin shaft is inserted into a through hole formed in the upper portion of the rear cover plate, a shifting fork block is installed at the end, close to the box body, of the shifting fork pin shaft, and a handle is installed at the other end of the shifting fork pin shaft. A groove is formed in the side, close to the rear cover plate, of the lower portion of the shifting fork block, a spring is arranged in the groove, and a steel ball is arranged at the other end of the spring and clamped into a limiting groove formed in the rear cover plate. A shifting fork sliding block is installed in a through hole in the lower portion of the shifting fork block, and a shifting fork is installed at the other end of the shifting fork sliding block. According to the gear shifting device, the moving path of the shifting fork sliding block in the shifting fork groove