Acceleration Deceleration Device for Sliding Door Piston Control

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Solution Overview

Problem

Existing acceleration and deceleration devices for sliding doors require a large installation space and cannot control the movement effectively near end positions, necessitating two devices for proper operation.

Innovation Solution

A compact acceleration and deceleration device with an energy storage structure and a piston guided by a carrier element within a cylinder, where a second carrier element controls the movement of the piston near end positions, allowing for controlled approach and deceleration of the sliding door.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If a single acceleration and deceleration device is used, then the installation space is reduced, but the control of movement near end positions becomes insufficient

Engineering Contradiction:

Improveinstallation spaceVSAvoidcontrol of movement near end positions

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The carrier element is divided into a first carrier element and a second carrier element, each responsible for different aspects of piston control. The first carrier element guides the piston during normal operation, while the second carrier element takes over near end positions to provide controlled deceleration, enabling reliable endpoint control within a compact single-device structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The device employs dynamic switching between different carrier elements based on piston position. As the piston approaches end positions, the system transitions from the first carrier element to the second carrier element, adapting the guidance mechanism to the specific operational phase and ensuring appropriate control characteristics throughout the entire travel range.

Inventive Principle:

Principle #15Dynamics

2Reliability

If two acceleration and deceleration devices are used to control movement in both directions, then the control near end positions is improved, but the installation space increases

Engineering Contradiction:

Improvecontrol near end positionsVSAvoidinstallation space

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent combines the functions of two separate acceleration and deceleration devices into a single integrated device. The first and second carrier elements work together within one device to provide bidirectional control with proper deceleration at end positions, eliminating the need for two separate devices and reducing installation space while maintaining reliable control.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single acceleration and deceleration device is designed to perform multiple functions: it controls piston movement in both directions, provides acceleration during normal operation, and ensures controlled deceleration near end positions. This multi-functional design replaces what would traditionally require two separate devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Volume of moving object

If a compact design with one device is used, then the space usage is optimized, but the controlled approach at end positions becomes difficult

Engineering Contradiction:

Improvedevice sizeVSAvoidcontrolled approach at end positions

Core Design Contradiction:

Volume of moving objectVSEase of operation

Solution Approach 1:

The second carrier element acts as an intermediary mechanism that engages near end positions to mediate the interaction between the piston and the end stops. This intermediary element provides the necessary controlled deceleration and approach, making the compact single-device design as easy to operate as larger traditional systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enables a compact design that allows for controlled movement of the sliding door to its end positions without jerking, reducing the need for multiple devices and optimizing space usage.

Implementation Method 1

at least one energy storage structure and a piston guided in a cylinder by means of a carrier element

Methodology Applied

Scientific EffectEnergy storage: Accumulator (energy)

Data Source

PatentUS8418406B2Acceleration and deceleration device with two carrier elements

Publication Date: 2013.04.16 ZIMMER GUNTHER

AI summary

In an acceleration and deceleration device which includes at least one energy storage device and a cylinder with at least one piston movably disposed in the cylinder and moved therein by a carrier element and a sliding door including a slidable door panel provided with an acceleration and deceleration device, a second carrier element is provided guiding either the first piston or the second piston for movement in the cylinder so as to control the movement of pistons and of the sliding door near its end positions.