Side Loader Garbage Truck Packing Blade and Cylinder Relocation

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Solution Overview

Problem

Existing garbage truck packing methods face issues such as potential leakage, difficult maintenance access, and wear on loader arms due to single-point contact rollers, leading to inefficiencies and maintenance challenges.

Innovation Solution

A sealed hopper floor with hydraulic cylinders located above the chassis, external grease points, and a multi-point contact roller system with a center pivot pin to reduce wear and facilitate easy maintenance, along with a packing blade that doubles as a hopper cover for improved operation and maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a 180 degree sweep packer paddle is used, then packing efficiency is improved, but maintenance access becomes difficult due to floor seal leakage points and under-body cylinder locations

Engineering Contradiction:
Improvepacking efficiencyVSAvoidmaintenance access
Core Design Contradiction:
ProductivityVSEase of repair

Solution Approach 1:

The invention extracts the hydraulic cylinders and grease points from the under-body location and relocates them to the top of the hopper. This allows maintenance personnel to access all hydraulic components and lubrication points from above, eliminating the need to work from inside the body or deal with floor seal leakage points while maintaining the 180 degree sweep packing efficiency

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of operation

If cylinders are mounted under the body, then packing function is achieved, but maintenance access is difficult and grease points are hard to reach

Engineering Contradiction:
Improvepacking functionVSAvoidmaintenance access
Core Design Contradiction:
Ease of operationVSEase of repair

Solution Approach 1:

The invention inverts the traditional mounting arrangement by placing the hydraulic cylinders on top of the hopper rather than underneath it. This reversal allows all maintenance activities including cylinder service and grease point lubrication to be performed from above, making maintenance as easy as changing a tire while preserving the packing function

Inventive Principle:
Principle #13The other way round (Inversion)

3Device complexity

If single point contact rollers are used on the loader arm, then the structure is simple, but wear on the loader arm increases

Engineering Contradiction:
Improveroller structure simplicityVSAvoidloader arm wear
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The invention segments the single contact point into multiple contact points by using a pair of rollers instead of one. This segmentation distributes the wear across two separate contact points on the loader arm, significantly reducing wear on any single point and extending the life of the loader arm while maintaining structural simplicity

Inventive Principle:
Principle #1Segmentation

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 solution enhances maintenance accessibility, reduces wear on loader arms, and prevents leakage, resulting in a more efficient and reliable garbage collection process.

Implementation Method 1

the packing blade being actuated with hydraulic cylinders that are located above the chassis of the garbage truck

Methodology Applied
Scientific EffectHydraulic pressure: Hydraulic Press

Implementation Method 2

The tandem axle has a center pivot pin that allows for multi-point contact between the rollers and the wear strip and that provides for reduced binding on the arm during arm extension

Methodology Applied
Scientific EffectFriction reduction through multi-point contact: Friction

Data Source

PatentUS7997852B1Side loader garbage truck
Publication Date: 2011.08.16 ARIZONA REFUSE SALES
  • US7997852B1 patent drawing
  • US7997852B1 patent drawing
  • US7997852B1 patent drawing

AI summary

An improved side loading garbage truck that includes an improved packing method that utilizes a packing blade that doubles as the hopper cover, that includes its hydraulic cylinders outside the body of the truck, does not have any potential leak points inside the body and includes all grease points outside the body providing easier access to the cylinders, blade and grease points for maintenance and installation. The other improvement is the use of multi-point contact rollers thereby reducing wear and tear and extending the life of the side loader arm.