Reach Forklift Load Wheel Mounting for Jack-Free Replacement

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Solution Overview

Problem

Conventional reach type forklift trucks require external jack equipment for load wheel replacement, making the process difficult and time-consuming.

Innovation Solution

A load wheel mounting structure that includes a wheel assembly with a rotatably mounted load wheel and an outer frame, allowing for easy assembly and disassembly by a single bolt, and enabling load wheel replacement without external jacking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional load wheel mounting structure is used, then the load wheel can be mounted on reach legs, but external jack equipment is required for replacement making the process difficult and time-consuming

Engineering Contradiction:
Improveease of load wheel replacementVSAvoidcomplexity of mounting structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The mounting structure is divided into separable components: the outer frame with integrated jack mechanism, the wheel assembly with side plates, and the bolt connection system. This segmentation allows the wheel assembly to be independently removed and reattached without requiring external jack equipment, directly resolving the contradiction between ease of replacement and structural complexity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The outer frame incorporates an integrated jack mechanism that enables the forklift to lift its own reach legs for wheel replacement without external equipment. The single bolt design allows the wheel assembly to be easily detached and reattached by manual operation, making the system self-sufficient and eliminating the need for external jack equipment

Inventive Principle:
Principle #25Self-service

2Productivity

If conventional load wheel mounting structure is used, then the load wheel is securely mounted, but replacement requires external jack equipment and involves difficulties in assembling and disassembling

Engineering Contradiction:
Improvespeed of load wheel replacementVSAvoidease of assembly and disassembly
Core Design Contradiction:
ProductivityVSEase of manufacture

Solution Approach 1:

The outer frame is pre-configured with the jack mechanism and bolt holes positioned to automatically align with the wheel assembly during insertion. The tapered guide holes are预先 designed to guide the bolts into correct positions, eliminating the need for complex alignment procedures during assembly and disassembly, thus increasing replacement speed while maintaining ease of manufacture

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The mounting structure transitions from a static rigid connection to a dynamic removable connection. The wheel assembly can be quickly inserted and secured with a single bolt, or rapidly removed by unscrewing the bolt. This dynamic design allows flexible adaptation between secure mounting and quick replacement, resolving the contradiction between productivity and ease of assembly

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP4570738A1Load wheel mounting structure for reach type forklift truck
Publication Date: 2025.06.18 DOOSAN BOBCAT KOREA CO LTD
  • EP4570738A1 patent drawingFigure 1
  • EP4570738A1 patent drawingFigure 2
  • EP4570738A1 patent drawingFigure 3

AI summary

The present disclosure provides a load wheel mounting structure for a reach type forklift truck, which is used to mount a load wheel on a pair of reach legs that extend forward of the reach type forklift truck, the load wheel mounting structure including: a wheel assembly including the load wheel which is rotatably mounted; and an outer frame that holds the wheel assembly, wherein, after the wheel assembly is inserted downward from the top of the outer frame, the wheel assembly is assembled to the outer frame by a first bolt that is inserted from a side.