Lift device for lower-limb exoskeleton robots

Manual lift device with leaf spring elasticity and ratchet locking for assisted lifting

This technology is a manual lift mechanism that utilizes the elastic energy of a leaf spring. It uses a trigger and wire system to control the locking state of a ratchet and pawl, assisting in the lifting and positioning of objects.

Conventional electric lift systems require an external power source, and the use of motors and precision gears leads to high manufacturing costs and installation limitations.

This technology features a dual-ratchet and double-clutch pawl actuator system to mechanically control the winding and unwinding power of a leaf spring. It allows for lifting or securing heavy objects through simple trigger operation without the need for electricity. It can be applied to exoskeleton robots, industrial strength-assist devices, and logistics operations, reducing manufacturing costs and installation constraints by eliminating the need for electrical power.

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Key Features:

• A main body rotatably coupled to a frame, with a leaf spring fixed to a lower-limb exoskeleton robot at one end and wound around the body, which is equipped with a hook.
• A pair of ratchets installed on both sides of the main body to restrict its movement as the leaf spring winds or unwinds.
• A ratchet pawl actuator rotatably installed on the main body, which uses a drive protrusion to rotate the pawl and lock or release the ratchet.
• A trigger installed on the outside of the side plate that uses a wire to rotate the ratchet pawl actuator clockwise or counter-clockwise.