Filter Attachment Layout for Pump Pulsation Noise Isolation
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Solution Overview
Problem
Existing methods for suppressing noise caused by pump pulsation in work vehicles, such as those described in Japanese Patent Laid-open No. 2006-188118, are inadequate as the elastic members used are often partially compressed and unable to effectively reduce noise transmission.
Innovation Solution
A filter attachment body is designed with a bracket attached to the vehicle body, a filter device attached to the bracket, and multiple elastic members interposed between the bracket and the filter device. The elastic members are strategically positioned outside of the filter body when viewed from the top, forming a geometric configuration that effectively absorbs and dissipates vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastic members are interposed between the bracket and filter device to suppress noise, then noise transmission is reduced, but the elastic members are partially compressed and unable to sufficiently suppress noise
Solution Approach 1:
The patent transitions from a single-point elastic member placement to a multi-point distributed arrangement. By positioning multiple elastic members at different locations around the filter device's projection area, the solution distributes the vibration absorption across multiple dimensions, preventing partial compression and improving overall noise suppression effectiveness.
Solution Approach 2:
The patent applies different elastic members at different locations based on local vibration characteristics. Each elastic member is positioned according to the specific vibration patterns and noise transmission paths at its location, creating localized optimization throughout the bracket-filter device assembly.
2Device complexity
If a single elastic member is used between the bracket and filter device, then the structure is simple, but the noise suppression is insufficient due to partial compression
Solution Approach 1:
The patent divides the single elastic member into multiple segmented elastic members distributed around the filter device. This segmentation allows each member to independently handle local vibrations without being compressed by adjacent structures, while collectively providing comprehensive noise suppression across the entire assembly.
3Area of stationary object
If elastic members are positioned inside the filter body, then the attachment is compact, but the geometric center does not overlap with the elastic member configuration reducing vibration absorption efficiency
Solution Approach 1:
The patent employs an asymmetric distribution of elastic members around the filter device's projection area, with the geometric center of this distribution deliberately aligned with the filter body's geometric center. This asymmetric yet center-aligned configuration optimizes vibration absorption by ensuring the elastic members are positioned to counteract vibrations from all directions while maintaining compact attachment.
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 proposed solution significantly reduces noise transmission caused by pump pulsation, both inside and outside the work vehicle, by effectively absorbing and dissipating vibrations through the geometric configuration of the elastic members, thereby enhancing noise suppression beyond existing methods.
Implementation Method 1
a plurality of elastic members (31) interposed between the bracket (11) and the filter device (12)
Data Source
AI summary
A filter attachment body is attached to a vehicle body of a work vehicle provided with a pump. The filter attachment body includes a bracket attached to the vehicle body, a filter device attached to the bracket, and a plurality of elastic members interposed between the bracket and the filter device. The bracket has an attachment plate to which the filter device is attached. The attachment plate is disposed substantially perpendicular to an up-down direction. The filter device has a filter case connected to the pump, and a filter body attached to the filter case. A geometric center of the filter body overlaps a figure drawn by linking the elastic members with straight lines when viewed from a top view of the attachment plate. At least a portion of at least one of the elastic members is located outside of the filter body when viewed from the top view.