Vehicle Seat Pumping Device Locking Plate Brake Drum Slip
Solution Overview
Problem
Existing pumping devices for vehicle seats experience slips of the brake drum due to external forces such as unevenness and vibration while the vehicle is in motion, leading to instability and potential safety issues.
Innovation Solution
A pumping device for a vehicle seat is designed with a separate locking structure that includes a brake drum, a locking plate, and an elastic member. The locking plate has a through-hole that couples with a coupling protrusion on the brake drum, allowing for a locking state that restricts the rotation of the brake drum and prevents slips when an external force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pumping device structure is used, then the device is simple in structure, but the brake drum slips under external forces such as unevenness and vibration
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a locking plate with guide holes, guide protrusions on the cover, and a brake drum with coupling protrusion. This segmentation allows each component to perform its specific function while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The locking plate acts as an intermediary element between the cover and the brake drum. It transmits and controls the locking action through its guide holes and coupling protrusion, providing a reliable mechanical connection that prevents brake drum slip while maintaining structural simplicity.
2Reliability
If the locking plate is positioned to restrict brake drum rotation, then slip prevention is achieved, but the device complexity increases
Solution Approach 1:
The locking plate combines multiple functions into a single component: it provides the locking surface, contains the guide holes for positioning, and features the coupling protrusion for engagement. This merging reduces the total number of components while achieving reliable slip prevention.
Solution Approach 2:
The locking plate serves multiple purposes simultaneously: it restricts brake drum rotation through the coupling protrusion, guides the locking action through guide holes, and provides structural support between the cover and brake drum. This multi-functionality reduces overall device complexity while maintaining reliability.
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
The implementation of the separate locking structure effectively prevents slips of the brake drum caused by external forces, ensuring stability and safety during vehicle operation.
Implementation Method 1
an elastic member disposed between the cover and the locking plate and configured to elastically support the locking plate
Data Source
AI summary
A pumping device for a vehicle seat includes a cover configured to be coupled to one surface of a housing, a brake drum assembled in the housing and having a coupling protrusion provided at a center of one surface of the brake drum that is directed toward the cover, a locking plate positioned between the brake drum and the cover and having a through-hole configured to be coupled to the coupling protrusion, the locking plate being configured to implement a locking state in which the through-hole is coupled to the coupling protrusion, or the locking plate being configured to implement an unlocking state in which the through-hole is separated from the coupling protrusion.