Self-locking mechanism for gearing arrangement, gearing arrangement, actuator, and lifting platform

A self-locking mechanism for a gearing arrangement, comprising:

• a casing;
• a self-locking gear;
• and a brake member, the self-locking gear meshing with the gearing arrangement, the brake member being connected between the casing and the self-locking gear,
• wherein in a case where the gearing arrangement pushes the self-locking gear forwardly, the brake member releases the self-locking gear, and in a case where the gearing arrangement pushes the self-locking gear reversely, the brake member brakes the self-locking gear,
• wherein the self-locking gear comprises a meshing part and a rotary part which is coaxially arranged with and secured to the meshing part, the brake member being connected to the rotary part,
• wherein the brake member refers to a torsion spring sleeved over the rotary part, the torsion spring elastically pressing against the rotary part, one end of the torsion spring being connected to the casing, wherein in the case where the self-locking gear is forwardly pushed, the torsion spring is radially expanded to bring the self-locking gear to rotate, and in the case where the self-locking gear is reversely pushed, the torsion spring clasps the rotary part to brake the self-locking gear, and
• wherein the rotary part comprises a body portion integrally formed with the meshing part and a tubing sleeved over the body portion, the tubing being circumferentially secured with the body portion, the torsion spring being sleeved over the tubing.