Braking mechanism, mechanical brake, electronic mechanical braking system, and vehicle

A mechanical brake, comprising:

• a brake disc and a braking mechanism, wherein the braking mechanism comprises:
• a fixed caliper;
• two braking units, wherein the two braking units are arranged in a first direction, and a braking gap used by a part of the brake disc for extending is formed between the two braking units, each braking unit is movably installed on the fixed caliper in the first direction, and the first direction is parallel to an axis direction of the brake disc;
• two crankshaft units that are in a one-to-one correspondence with the two braking units, wherein in each group of the braking unit and the crankshaft unit that correspond to each other, the crankshaft unit is located on a side that is of the braking unit and that is away from the braking gap, the crankshaft unit is rotatably installed on the fixed caliper around a first axis, and the first axis is perpendicular to the first direction;
• and
• a drive unit, wherein the drive unit is fixed to the fixed caliper, and the drive unit is in transmission connection with the two crankshaft units through a connecting rod assembly, to drive the two crankshaft units to rotate, and, when the two crankshaft units rotate, the two braking units are driven to move oppositely at the same time to approach each other;
• wherein a part of the brake disc extends into a fixed caliper, and is located in a braking gap between two braking units.

An electronic mechanical braking system, comprising:

• a braking pedal,
• an electronic braking mechanism,
• a switching mechanism, and
• a mechanical brake, wherein the mechanical brake comprises a brake disc and a braking mechanism, and the braking mechanism comprises:
• a fixed caliper;
• two braking units, wherein the two braking units are arranged in a first direction, and a braking gap used by a part of the brake disc for extending is formed between the two braking units, each braking unit is movably installed on the fixed caliper in the first direction, and the first direction is parallel to an axis direction of the brake disc;
• two crankshaft units that are in a one-to-one correspondence with the two braking units, wherein in each group of the braking unit and the crankshaft unit that correspond to each other, the crankshaft unit is located on a side that is of the braking unit and that is away from the braking gap, the crankshaft unit is rotatably installed on the fixed caliper around a first axis, and the first axis is perpendicular to the first direction;
• and
• a drive unit, wherein the drive unit is fixed to the fixed caliper, and the drive unit is in transmission connection with the two crankshaft units through a connecting rod assembly, to drive the two crankshaft units to rotate, and, when the two crankshaft units rotate, the two braking units are driven to move oppositely at the same time to approach each other;
• wherein a part of the brake disc extends into a fixed caliper, and is located in a braking gap between two braking units;
• wherein the electronic braking mechanism is signal-connected to each of the braking pedal, the mechanical brake, and the switching mechanism, to control braking of the mechanical brake based on signals of the braking pedal and the switching mechanism.