Oven Door Hinge Linkage With Adjustable Spring Balancing
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Solution Overview
Problem
Conventional oven door hinges lack a mechanism to slow down automatically at a certain position, leading to potential damage from kinetic energy when closing, and require complex adjustments for different oven types.
Innovation Solution
A hinge design featuring a movable support rivet, connecting shaft, and spring system that provides balancing and buffering forces, allowing the door to stop at specific angles and close safely, with adjustable components for varying weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common hinge with spring pulling mechanism is used, then the door body can be opened and closed, but the door body strikes the oven sill when closing due to large kinetic energy and cannot be slowed down automatically
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping element (sponge or rubber buffer) at the door sill position before the door closes. This cushioning element absorbs the kinetic energy of the closing door, preventing direct impact damage to the door sill while maintaining the simple spring-based hinge structure.
Solution Approach 2:
The patent uses a damping material as an intermediary between the door and the door sill. This intermediary element absorbs the shock and impact energy during door closing, protecting both the door sill and hinge from damage while allowing the door to close naturally under spring force.
2Object-affected harmful factors
If damping material is added to the door sill, then impact damage is reduced, but the spring still has large potential energy and the door sill or hinge remains easy to be damaged
Solution Approach 1:
The patent modifies the spring parameters by reducing its stiffness coefficient and pre-compression amount, thereby lowering the potential energy stored in the spring. This parameter change ensures that the spring provides sufficient closing force while limiting the maximum kinetic energy the door can achieve, preventing damage even without heavy reliance on damping materials.
3Reliability
If a hinge structure with automatic slowing down capability is designed, then door closing safety is improved, but the structure becomes complicated and requires overall adjustment for different oven types
Solution Approach 1:
The patent extracts the automatic slowing down function from a complex mechanical control system and implements it through a simple passive damping element (sponge or rubber buffer) placed at the door sill. This extraction maintains door closing safety while avoiding the complexity of active control mechanisms or adjustable components.
Solution Approach 2:
The patent uses inexpensive, simple damping materials like sponge or rubber buffers instead of complex mechanical slowing mechanisms. These simple elements are easy to replace and install, providing effective door closing control without adding structural complexity or requiring adjustments for different oven types.
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
Ensures safe, stable, and convenient operation by maintaining a balancing angle between 25° and 85°, providing supporting force during opening and holding pressure during closing, while allowing for easy adaptation to different oven types through adjustable components.
Implementation Method 1
a first end of a spring 3 is hung to the connecting shaft 72, the other end of the spring 3 is hung to a hanging shaft 62 that is disposed fixedly with the hinge base 6
Implementation Method 2
the roller presses on an inclined surface of the hinge arm, so that the door is quickly closed within 25°
Data Source
Figure 1
Figure 2~3
AI summary
A hinge includes a hinge arm (1) and a hinge base (6) fitting with the hinge arm. A support (2) is disposed between the hinge arm (1) and the hinge base. A first end of the support is movably connected to the hinge arm, and a second end is movably disposed with the hinge base (6). A locking position (12) is disposed on the hinge arm. A connecting piece (4) is disposed in fitting with the locking position. A first end of the connecting piece is movably connected to the body of the support, and a second end is movably connected to a first end of a rocking bar (7). The body portion of the rocking bar (7) is movably connected coaxially to a second end of the support (2) and the hinge base (6). A connecting shaft (72) is disposed on a second end of the rocking bar. A first end of a spring (3) is hung to the connecting shaft, and the other end of the spring is hung to a hanging shaft (62) that is disposed fixedly with the hinge base. Because of the connecting spring, the connecting piece and the support on the key component rocking bar, by adjusting a hole position of a connecting rivet and a force of the spring, a balancing force and a buffering force can be provided for gates with different weights in a changing way, and the adaptability is good.