Door Opener Driving Device With Adjustable Spring Pre-Compression
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Solution Overview
Problem
Existing door opener systems face challenges in adjusting the pre-compression of springs for different door weights, leading to difficulties in manual return functionality and potential unpredictable changes in spring compression over time.
Innovation Solution
A driving device with a casing, motor, transmission members, and an adjusting ring system that allows for easy adjustment of the return spring's pre-compression by rotating the adjusting ring, which changes the spring's compression state based on the door's weight, ensuring reliable automatic door closure and preventing undesired rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the spring pre-compression is adjusted for different door weights, then the manual return functionality is improved, but the adjustment process becomes difficult and the compression may change unpredictably over time
Solution Approach 1:
The adjusting ring is nested on the connecting rod with a threaded connection, allowing the adjusting ring to move along the connecting rod when rotated. This nested structure enables easy adjustment of the spring pre-compression by simply rotating the adjusting ring, which moves laterally to change the compression extent, while maintaining a compact integrated design.
2Ease of operation
If the adjusting mechanism is made accessible for easy adjustment, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The adjusting ring is extracted from the internal structure and positioned on the external side of the casing, making it easily accessible for adjustment operations without requiring disassembly of the device. The adjusting ring is threaded on the connecting rod and positioned externally, allowing users to adjust the spring pre-compression by simply rotating the adjusting ring from the outside of the device.
3Ease of operation
If the adjusting ring is positioned outside the movable sleeve for easy access, then the ease of operation is improved, but the risk of undesired rotation increases
Solution Approach 1:
The positioning groove and positioning member create a mechanical feedback system that provides tactile and positional feedback during adjustment. When the positioning member engages with the positioning groove, it indicates that the adjusting ring has reached a precise position, allowing for accurate adjustment while preventing undesired rotation through the engagement of these positioning elements.
Solution Approach 2:
The adjusting ring transitions from a static fixed position to a dynamically adjustable position through rotation. The threaded connection allows the adjusting ring to move dynamically along the connecting rod when rotated, enabling flexible adjustment of the spring pre-compression while maintaining stability when engaged with the positioning groove.
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 precise adjustment of spring compression for various door weights, ensuring smooth and reliable automatic door closure, while preventing unpredictable changes in compression, thus enhancing the functionality and reliability of the door opener system.
Implementation Method 1
A spring is compressed when the door is opened. When the door is released, the spring pushes the door for automatically closing the door.
Implementation Method 2
An adjusting ring is in threading connection with the threaded section of the connecting rod and is located outside of the casing. When the first transmission member does not rotate, rotation of the adjusting ring causes displacement of the adjusting ring in the lateral direction to change an extent of pre-compression of the return spring.
Implementation Method 3
A motor is coupled to the casing. The motor drives the first transmission member to rotate.
Implementation Method 4
A first transmission member is rotatably mounted to the casing. The motor drives the first transmission member to rotate. A sliding member is slidably mounted to the casing. The sliding member slides in a lateral direction when the first transmission member rotates.
Data Source
AI summary
A driving device for a door opener includes a motor driving a first transmission member to rotate. Rotation of the first transmission member causes lateral displacement of a sliding member which moves jointly with a connecting rod. A return spring is mounted around the connecting rod. An adjusting ring is in threading connection with the connecting rod and abuts against the return spring. When the first transmission member does not rotate, rotation of the adjusting ring causes displacement of the adjusting ring in the lateral direction to change an extent of pre-compression of the return spring. When the first transmission member rotates in a direction, the connecting rod and the adjusting ring together move in the lateral direction towards the first transmission member, and the return spring is compressed. When the first transmission member rotates in a reverse direction, and the return spring restores its length.