Bottom Spring Cone Crusher for Fast Iron Passing Protection

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Solution Overview

Problem

Existing cone crushers face issues with slow iron passing reaction, high maintenance costs, and wear of sealing members due to hydraulic cylinder technology, particularly in crushers with upper-frame and bottom single-cylinder hydraulic adjustment type mechanisms.

Innovation Solution

A cone crusher with a bottom spring adjustment type mechanism, featuring a spring assembly supported by a thrust bearing unit, which elastically supports the main shaft and movable cone, allowing for efficient iron passing protection and convenient maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If upper-frame hydraulic or spring iron passing protection is used, then iron passing protection function is achieved, but structure complexity increases and maintenance costs increase

Engineering Contradiction:

Improveiron passing protection functionVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent inverts the traditional upper-frame iron passing protection approach by moving the spring mechanism to the bottom frame. Instead of supporting the movable cone from above, the spring assembly now supports it from below, fundamentally changing the structural arrangement while maintaining the iron passing protection function.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent extracts the iron passing protection function from the complex upper-frame hydraulic system and implements it through a simpler bottom spring mechanism. This separates the protection function from the complex hydraulic control system, achieving the same protective effect with much simpler structure.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If bottom single-cylinder hydraulic adjustment type iron passing protection is used, then iron passing protection function is achieved, but maintenance costs increase and sealing members wear

Engineering Contradiction:

Improveiron passing protection functionVSAvoidmaintenance costs

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent replaces the hydraulic cylinder system with a pure mechanical spring assembly. This substitution eliminates hydraulic sealing members that are prone to wear and leakage, replacing them with a robust mechanical spring system that is much easier to maintain and repair.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The spring assembly uses simple, inexpensive mechanical components that can be easily replaced if needed. Unlike expensive hydraulic cylinders with complex sealing systems, the spring components are economical and can be quickly swapped without specialized maintenance equipment.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If upper-frame iron passing protection is used, then iron passing protection function is achieved, but iron passing reaction speed is slow

Engineering Contradiction:

Improveiron passing protection functionVSAvoidiron passing reaction speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The spring assembly is pre-compressed and stored at the bottom frame, ready to immediately counterbalance the movable cone's weight. When iron passes occur, the pre-positioned spring provides instant upward force, eliminating the delay associated with hydraulic system response time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By replacing hydraulic systems with direct mechanical spring action, the patent achieves immediate response to iron passing conditions. Mechanical springs respond instantly to load changes, whereas hydraulic systems have inherent delays due to fluid compression and valve response times.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 provides a simple structure, low maintenance costs, and avoids wear of sealing members, while enabling flexible adjustment of the discharge port and enhancing the crusher's versatility and practicality.

Implementation Method 1

a spring assembly (232) arranged inside the sleeve (21) and configured to elastically support the lower end of the main shaft (4)

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a thrust bearing unit (3) arranged on the bottom frame (1) and configured to support the lower end of the main shaft (4)

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS20260084159A1Cone crusher with bottom spring adjustment type mechanism

Publication Date: 2026.03.26 ZHEJIANG ZHEKUANG HEAVY IND CO LTD

AI summary

A cone crusher with a bottom spring adjustment type mechanism is provided. The cone crusher includes a bottom frame, an upper frame, an eccentric mechanism arranged on the bottom frame, a main shaft arranged on the eccentric mechanism, a movable cone fixed on the main shaft above the eccentric mechanism, and a fixed cone arranged in the upper frame. A discharge port is formed between the fixed cone and the movable cone. A bottom spring mechanism is arranged in or connected to the bottom frame. An upper end of the bottom spring mechanism elastically supports the main shaft through a thrust bearing unit. By using the bottom spring mechanism to elastically support the main shaft, the solution has the advantages of simple structure, low costs, and convenient maintenance. Furthermore, a problem of wear of a sealing member due to the use of a hydraulic cylinder technology is avoided.