Hydraulic Hammer Tool Rod Support for Even Wear and Easier Service
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Solution Overview
Problem
Hydraulic hammer bushings experience uneven wear, leading to premature replacement, significant material waste, and arduous servicing due to their large size and weight, with existing solutions like the arc-shaped rod support not addressing these issues.
Innovation Solution
Replace bushings with a plurality of rods that engage the tool circumferentially in the housing, distributing wear evenly and allowing individual replacement when wear thresholds are reached, with rods of equal size, weight, and shape to facilitate efficient servicing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional large-sized bushings are used to receive the tool, then the housing structure is simple, but the bushings experience uneven wear leading to premature replacement and significant material waste
Solution Approach 1:
The single large bushing is segmented into multiple smaller rods (typically 3-6 rods arranged circumferentially). Each rod independently engages the tool, distributing wear across multiple contact points. This segmentation allows wear to be evenly distributed and enables replacement of only worn rods rather than the entire bushing assembly, reducing material waste and extending service life.
2Ease of repair
If traditional large-sized bushings are used, then structural simplicity is maintained, but servicing and replacement become arduous tasks due to large size and weight
Solution Approach 1:
The bushing assembly is divided into multiple smaller, lighter rod components. Each rod weighs significantly less than a traditional bushing, making them easier to handle, install, and replace. The segmented design allows servicing to be performed on individual rods rather than requiring removal and replacement of the entire bushing assembly, dramatically improving ease of repair.
3Reliability
If a single bushing design is used for the entire tool length, then manufacturing is simplified, but wear is concentrated in specific areas causing premature failure
Solution Approach 1:
Each rod is designed with specific engagement characteristics for different portions of the tool. The rods can be positioned to engage different sections of the tool housing, with each rod optimized for its specific location. This local quality approach ensures even wear distribution across the entire tool length while maintaining relatively simple manufacturing processes for each individual rod.
Data Source
AI summary
A hydraulic hammer includes a housing configured to receive a housing portion of a tool and a first plurality of rods provided in the housing. The first plurality of rods are configured to engage a first portion of the housing portion of the tool. The first plurality of rods are parallel to a longitudinal axis of the tool. The hydraulic hammer further includes a second plurality of rods provided in the housing. The second plurality of rods are configured to engage a second portion of the housing portion of the tool. The second plurality of rods are parallel to the longitudinal axis of the tool.