Segmented Stopper Design for Compact Vibration Damping
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Solution Overview
Problem
Conventional vibration-damping support devices require large installation spaces due to the need for significant horizontal clearance between stoppers and the elastic member, which limits their installation in machines with restricted space, such as small swing radius hydraulic excavators, and also incur high manufacturing costs due to the requirement for large-scale facilities and shallow cup-shaped stoppers.
Innovation Solution
The vibration-damping support device integrates the stopper with the support member, allowing it to remain stationary during vibrations, reducing the need for horizontal clearance and enabling smaller stopper dimensions, and uses plate members instead of shallow cup shapes, facilitating easier manufacturing with smaller press machines and potentially simpler cutting work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stoppers are integrally attached to the mounting platform for the engine, then the stoppers can effectively prevent excessive deformation of the elastic member under vertical vibrations, but the stoppers move in the horizontal direction during horizontal vibrations, requiring large horizontal clearance between stoppers and the elastic member, which increases the installation space requirement
Solution Approach 1:
The stopper is divided into two separate parts: the first stopper is attached to the mounting platform to prevent excessive deformation during vertical vibrations, while the second stopper is attached to the support bracket to limit horizontal movement. This segmentation allows each stopper to independently address specific vibration directions without interfering with each other, eliminating the need for large horizontal clearance while maintaining protection against excessive deformation.
2Reliability
If large horizontal clearance is provided between stoppers and the elastic member to avoid interference during horizontal vibrations, then the elastic member is protected from damage, but the stoppers must have large outer diameter dimensions, increasing the installation space requirement
Solution Approach 1:
By segmenting the stopper function into two separate stoppers positioned in different locations, each stopper can have a smaller outer diameter since they only need to address specific vibration directions. The first stopper on the mounting platform handles vertical vibrations, while the second stopper on the support bracket handles horizontal vibrations, eliminating the need for large clearance and reducing overall installation space.
Solution Approach 2:
The solution moves from a single stopper requiring large horizontal clearance to a two-stopper system where the second stopper is positioned on the support bracket, utilizing the vertical dimension and the space between the support bracket and mounting platform. This dimensional redistribution allows compact stopper designs with smaller outer diameters while maintaining comprehensive vibration protection.
3Reliability
If shallow cup-shaped stoppers are used to prevent excessive deformation of the elastic member, then the elastic member is protected under vertical vibrations, but large-scale facilities are required for manufacturing, increasing manufacturing costs
Solution Approach 1:
The stopper is segmented into two simpler components that can be manufactured independently using conventional machinery. The first stopper attached to the mounting platform and the second stopper attached to the support bracket are both simpler in shape compared to a single shallow cup-shaped stopper, allowing manufacturing with smaller, more economical press machines and reducing overall manufacturing costs.
4Area of stationary object
If the stopper is arranged integrally with the support member, then the stopper remains stationary during vibrations, reducing the need for horizontal clearance and enabling smaller stopper dimensions, but the stopper must be positioned to avoid interference with the elastic member during vibrations
Solution Approach 1:
The stopper is segmented into two parts positioned at different locations: the first stopper on the mounting platform and the second stopper on the support bracket. This segmentation simplifies the positioning requirements for each individual stopper, as each only needs to be positioned to address specific vibration directions, reducing the overall complexity compared to positioning a single integrally-attached stopper that must account for all vibration modes simultaneously.
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 design reduces the required installation space, allows for more flexible equipment layout, and lowers manufacturing costs by enabling the use of smaller machinery and simpler manufacturing processes, making it feasible to install in space-restricted machines while maintaining the durability of the elastic member.
Implementation Method 1
an elastic member for absorbing vibrations of the engine 21
Data Source
AI summary
To provide a vibration-damping support device that requires a smaller space for its own installation. A vibration-damping support device is provided with a rubber mount, a support member supporting the rubber mount thereon, and stoppers. The rubber mount is to be attached to a mounting platform for an object which is installed in a hydraulic excavator and is to be damped, for example, an engine that vibrates in vertical and horizontal directions, and has an elastic member of a rubber or like member for absorbing vibrations of the engine. The support member can be, for example, a support bracket to be fixedly secured on an unillustrated revolving frame. The stoppers are arranged integrally with the support bracket, and prevent an excessive deformation of the elastic member of the rubber mount under vibrations of the engine. The stopper is arranged on an upper side of the support bracket, while the stopper is arranged on a lower side of the support bracket. The stoppers are formed of plural plate members, which are each of a circular arc shape as viewed in plan.