Cylindrical Door Actuator Axial Motor Arrangement
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Solution Overview
Problem
Conventional door opening and closing devices have low vehicle mountability due to their fixed shape and dimension, which makes them unsuitable for installation in different vehicle models and positions.
Innovation Solution
A door opening and closing device with a cylindrical accommodation member that houses the motor and transmission mechanism, allowing them to be arranged in the axial direction of the rotary shaft, enabling a compact rod-shaped design that can be easily installed in various vehicle models and positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the accommodation member has a fixed shape and dimension suitable for a specific application vehicle model, then the door opening and closing device can be properly installed in that vehicle model, but it cannot be fitted to other vehicle models or installation positions
Solution Approach 1:
The accommodation member is designed with a cylindrical shape that can universally accommodate the motor and transmission mechanism regardless of installation position or vehicle model. This standardized cylindrical form factor allows the same door opening and closing device to be mounted in multiple locations (front door, rear door, slide door, back door) and fitted to various vehicle models, eliminating the need for model-specific accommodation member designs.
Solution Approach 2:
The patent transitions from fixed-dimensional accommodation members designed for specific applications to a cylindrical geometry that leverages radial symmetry and axial alignment. By arranging components in the axial direction of the cylindrical accommodation member, the design achieves adaptability across different installation spaces without requiring custom-shaped housings for each application.
2Ease of operation
If the accommodation member is designed for a specific installation position, then the device fits that position well, but it reduces flexibility for installation in other positions
Solution Approach 1:
The cylindrical accommodation member serves as a universal mounting platform that can be installed in various vehicle positions (front door, rear door, slide door, back door). The standardized cylindrical interface simplifies the installation process across different locations while maintaining the flexibility to adapt to various mounting spaces, thereby improving both installation ease and position flexibility simultaneously.
3Reliability
If the motor and transmission mechanism are arranged in a conventional configuration, then the functional requirements are met, but the device size and shape limit installation options
Solution Approach 1:
The patent arranges the motor and transmission mechanism in the axial direction of the cylindrical accommodation member, utilizing the axial dimension for component placement. This axial arrangement within the cylindrical housing creates a compact rod-shaped overall structure that maintains functional performance while significantly improving installation adaptability to various vehicle spaces with limited radial clearance.
Solution Approach 2:
The transmission mechanism and motor are nested within the cylindrical accommodation member, with components arranged concentrically and axially. This nested configuration maximizes space utilization within the cylindrical housing, creating a compact assembly that can be installed in tight spaces while maintaining all necessary functional relationships between components.
Data Source
AI summary
A door opening and closing device includes: a motor; an output shaft configured to output power of the motor; a transmission mechanism configured to transmit the power of the motor to the output shaft; and an accommodation member configured to accommodate the motor and the transmission mechanism. The door opening and closing device is installed in a vehicle main body or a door supported by the vehicle main body in an openable and closable manner, thereby opening and closing the door by the power that is output from the output shaft. The accommodation member is cylindrical in shape, and the motor and the transmission mechanism are accommodated in the accommodation member so that the motor, the transmission mechanism, and the output shaft are arranged in an axial direction of a rotary shaft of the motor.