Dual-Reservoir Rear Shock Absorber for Compact Scooter Packaging
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Solution Overview
Problem
Current shock absorbers for scooters, both single-reservoir and dual-reservoir types, face issues such as limited stroke, frequent abrasion, complexity in manufacturing, increased weight and volume, and difficulty in installation and maintenance, particularly in small vehicles like scooters, due to insufficient space and increased costs.
Innovation Solution
A rear shock absorber design featuring two reservoirs, including a connecting main body, fixation base, fixation reservoir, and linked-pipe reservoir, with damping oil flowing through an oil path to provide enhanced buffering effect, utilizing snap-fit and screw thread connections for assembly, and allowing for parallel arrangement to optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-reservoir shock absorber is used, then the structure is simple, but the stroke is short and buffering effect is reduced
Solution Approach 1:
The shock absorber is divided into two separate reservoirs (first reservoir and second reservoir) connected by an oil passage. This segmentation allows each reservoir to contribute to the overall stroke, effectively doubling the stroke length compared to a single-reservoir design while maintaining structural simplicity through the connection mechanism.
Solution Approach 2:
The first piston and second piston are nested within the same shock absorber body, with both pistons moving independently within their respective reservoirs. This nested configuration allows the system to achieve extended stroke length without proportionally increasing the external dimensions or complexity of the overall structure.
2Length of moving object
If a dual-reservoirs shock absorber is used, then the stroke is increased, but the manufacturing complexity and number of parts increase
Solution Approach 1:
The first reservoir and second reservoir are merged into a single integrated shock absorber body, sharing common structural elements such as the shock absorber body, mounting brackets, and sealing mechanisms. This merging approach achieves the benefits of dual-reservoir extended stroke while reducing manufacturing complexity by eliminating the need for completely separate assembly processes.
Solution Approach 2:
The shock absorber body serves multiple functions: it contains both the first reservoir and second reservoir, provides mounting points for both pistons, and incorporates the oil passage system. This multi-functionality reduces the total number of parts and simplifies manufacturing compared to traditional dual-reservoir designs that require separate housing components for each reservoir.
3Reliability
If a dual-reservoirs shock absorber is used, then the buffering effect is improved, but the volume and weight increase
Solution Approach 1:
The two reservoirs are arranged in a parallel configuration within the shock absorber body, utilizing space in a different dimensional arrangement rather than extending the length. This allows the system to achieve doubled stroke length and improved buffering effect without proportionally increasing the overall volume or weight of the shock absorber assembly.
4Reliability
If a dual-reservoirs shock absorber is used, then the buffering effect is improved, but the installation and maintenance difficulty increases
Solution Approach 1:
The first reservoir and second reservoir are designed as separable components that can be independently accessed and serviced. The oil passage connecting the two reservoirs is designed to allow for easy disconnection and cleaning, enabling maintenance personnel to service one reservoir at a time without having to disassemble the entire shock absorber system, thus improving ease of repair while maintaining the dual-reservoir buffering advantage.
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
The design offers improved buffering performance, simplified assembly, reduced installation costs, and easier maintenance, while accommodating limited space requirements, enhancing rider comfort and stability.
Implementation Method 1
The shock absorbing body tube has damping oil therein. When the movable rod is driven by the spring to push the piston forward, the shock absorbing body tube can absorb the impact forces via the damping oil
Implementation Method 2
the damping oil in the shock absorbing body tube will slowly enter the assistant shock absorbing body tube along the oil path to increase the stroke thereof
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A rear shock absorber (1) having two reservoirs (30, 300) includes a connecting main body (10), a fixation base (20), a fixation reservoir (30) and a linked-pipe reservoir (300). The connecting main body (10) has an installation hole (101) and an oil path and a shock absorber (40) is connected to the installation hole (101). Each of the fixation reservoir (30) and the linked-pipe reservoir (300) has a buffer room (301, 3001). The connecting main body (10) has an oil path disposed therein and the damping oil inside the oil path flows to the buffer room (301) of the fixation reservoir (30). Another shock absorber (41) is connected to the linked-pipe reservoir (300) via an oil pipe (204) and the damping oil therein flows to the buffer room (3001) of the linked-pipe reservoir (300).