Drawer Sliding Rail Locking Structure for Smooth Low-Vibration Motion
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Solution Overview
Problem
Existing sliding rail assembly auto locking structures face issues with spring wear, difficulty in replacing damaged components, instability in reciprocating motion, and vibration during use, leading to ineffective locking and smooth motion.
Innovation Solution
The sliding rail assembly incorporates a holder base, a swivel hook, two return springs, and a hydraulic cylinder, with oblique guide grooves and guide blocks that support the swivel hook, allowing smooth movement and disengagement, and positioning the return springs outside the holder base to prevent wear, while the hydraulic cylinder buffers the return stroke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spring member is mounted inside the spring chamber in the holder base, then the structure is compact, but the spring member wears quickly and is difficult to replace
Solution Approach 1:
The spring member is separated from the holder base and mounted on the slide component instead. This segmentation allows the spring member to be replaced by simply detaching the slide from the holder base, eliminating the need for disassembly of the holder base structure.
Solution Approach 2:
The spring member is extracted from the enclosed spring chamber in the holder base and repositioned on the slide. This extraction enables direct access to the spring member for replacement while maintaining its functional role in the locking mechanism.
2Device complexity
If the spring member is mounted inside the holder base, then the structure is integrated, but the spring member rubs against the chamber wall causing quick wear
Solution Approach 1:
The spring member is separated from the holder base structure and relocated to the slide component. This eliminates the rubbing contact between the spring member and the holder base chamber wall, preventing wear while maintaining structural integrity through the slide's guide rods.
Solution Approach 2:
The slide component acts as an intermediary carrier for the spring member, providing a dedicated mounting location with guide rods that prevent lateral movement and rubbing, thereby protecting the spring member from wear.
3Stability of the object's composition
If the guide rod is retained in the front retaining groove portion, then the slide is constrained, but the guide rod may be forced out causing the slide to be pulled backwards
Solution Approach 1:
The retention mechanism is changed from a static groove constraint to a dynamic engagement system using an arched block that can be pushed into a recess by the guide rod. This dynamic system allows the guide rod to be retained during normal operation but can be forcibly removed when needed, preventing the slide from being pulled backwards.
Solution Approach 2:
The retention mechanism uses a simplified geometric form - the guide rod pushes the arched block into a recess, creating a reliable retention system that is easier to manufacture and more reliable than the complex groove structure.
4Device complexity
If the spring member is kept in an oblique manner on the guide rod, then the structure is simple, but the reciprocating motion is unstable and the spring member has short working life
Solution Approach 1:
The spring member is changed from a static oblique mounting to a dynamic configuration where it can be compressed and extended along the guide rod's longitudinal axis. This dynamic alignment ensures stable reciprocating motion and extends the spring member's working life by preventing oblique stresses.
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 configuration ensures durable operation, easy replacement of components, reduced vibration and noise, and stable locking and unlocking of the drawer, enhancing the overall performance and longevity of the sliding rail assembly.
Implementation Method 1
two return springs respectively connected to the holder base and the slide and capable of being compressed and stretched
Implementation Method 2
a hydraulic cylinder is provided in the holder base and the reciprocating rod of the hydraulic cylinder is coupled to the slide to buffer the return stroke of the slide
Data Source
AI summary
A sliding rail assembly auto locking structure for drawer is disclosed comprised of a holder base, a swivel hook, a slide, two return springs, an actuating block. When an arched block of the swivel hook is approaching a recess in the holder base for positioning, the arched block does not fall to the recess directly, and at this time, oblique guide grooves of the swivel hook are moved over associating guide blocks of the holder base to guide the arched block into the recess slowly and smoothly, and therefore the inner sliding rail of the sliding rail assembly is moved with the drawer smoothly without vibration.