Interlock mechanism of chassis truck and switchgear door

The utility model discloses an interlock mechanism of a chassis truck and a switchgear door. The interlock mechanism comprises a switchgear door (1), an end carriage (8) and a chassis (11), wherein a screw (5) is arranged on the central section of the end carriage (8), a door bending plate (2) is installed on the switchgear door (1), a pin (13) and a limiting shaft (12) are installed on the end carriage (8) of the chassis truck, an interlocking hook plate (3) is sleeved on the pin (13), rollers (6) are fixed on the interlocking hook plate (3), and a reset extension spring (4) is arranged between the interlocking hook plate (3) and the screw (5). The interlock mechanism increases operation security, does not affect original operation function, and satisfies safe reliability and versatility requirement of electric appliance.