Winch Sliding Gear Ring for Sun-Planet Carrier Engagement
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Solution Overview
Problem
Current winches face issues with the engagement between the three-stage sun gear and two-stage planet carrier, leading to mis-engagement and potential damage due to reduced spring elasticity, and the brake unit is prone to friction-related failures, affecting normal operation.
Innovation Solution
The winch design includes a sliding gear ring and improved brake unit with a sliding gear rack and block system, ensuring proper engagement between the three-stage sun gear and two-stage planet carrier, and indirect braking through the friction ring, even when spring elasticity is reduced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the three-stage sun gear and two-stage planet carrier are switched from separation to reunion state, then the clutch engagement is achieved, but the three-stage sun gear may not enter the two-stage planet carrier properly due to reduced spring elasticity, causing mis-engagement and potential damage
Solution Approach 1:
The patent applies preliminary action by manually rotating the drum before energizing the motor to pre-position the three-stage sun gear and two-stage planet carrier for proper engagement. This preliminary mechanical alignment ensures that when the clutch engages, the gears are already in the correct positional relationship, preventing mis-engagement even when spring elasticity is reduced.
Solution Approach 2:
The patent introduces an intermediary mechanism (the manual rope pulling operation) that mediates between the separation and reunion states of the clutch. This intermediary action allows controlled adjustment of the gear positions before final engagement, ensuring proper alignment without relying solely on spring force.
2Reliability
If the rectangular spring is used for braking, then the brake unit can brake the intermediate transmission shaft and friction ring, but the rectangular spring is prone to heat failure due to friction during braking
Solution Approach 1:
The patent extracts the braking function from the rectangular spring by introducing a separate brake unit with a brake shoe and brake drum. The rectangular spring retains only its original function while the brake unit handles the braking operation, eliminating the heat generation problem caused by friction in the spring.
Solution Approach 2:
The patent introduces a brake shoe as an intermediary element between the rectangular spring and the friction ring. This brake shoe absorbs the friction and heat generation during braking, protecting the rectangular spring from thermal damage while maintaining the braking function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the engagement reliability, reduces mis-engagement, protects the teeth integrity, and maintains effective braking, extending the winch's service life and ensuring operational reliability.
Implementation Method 1
a sliding gear ring is slidably mounted in a two-stage planet carrier in the two-stage deceleration assembly, and the external teeth of the sliding gear ring are always in engagement with internal teeth in the two-stage planet carrier
Implementation Method 2
one end of a spring C located in the two-stage planet carrier is connected to the sliding gear ring, and the other end is connected to the inner ring of the center hole of the two-stage planet carrier
Implementation Method 3
the brake unit in the winch is to brake the intermediate transmission shaft and friction ring. During the braking, the drum is pulled by the twisted rope, the rotating drum drives the intermediate transmission shaft to rotate through the deceleration component, and the intermediate transmission shaft brakes through the brake unit and friction ring
Data Source
AI summary
A winch includes a coupling A, a coupling B, a rectangular spring, a gear wheel, a gear rack, a friction ring, and a transmission shaft, etc. By increasing the distance between the adjacent internal teeth of the two-stage planet carrier, it ensures that the three-stage sun gear can be smoothly inserted into the two-stage planet carrier even if the elasticity of spring A is reduced, such that the engagement width between the three-stage sun gear and the two-stage planet carrier can reach the normal requirements. With the design of sliding gear ring and spring C, it can greatly reduce the phenomenon of mis-engagement when the external teeth of the three-stage sun gear enter the internal teeth spacing of the two-stage planet carrier, protect the teeth integrity of the three-stage sun gear and the two-stage planet carrier.