Forklift Cabin Door Mounting Bar Without Drilling
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Solution Overview
Problem
The existing methods for mounting doors and windows on a forklift cabin require drilling, which can damage embedded wiring, pose a fire risk, and result in loose fastenings due to inadequate thread thickness, leading to manufacturing costs and efficiency issues.
Innovation Solution
A door mounting bar with a bent portion and coupling parts is attached to the outer surface of the cabin frame pipes, allowing for bolt-fastened assembly without drilling, using a hinge bracket with integrated threads for secure fastening and an adhesive to prevent loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If drilling is performed to install hinge means on hollow pipes, then doors can be mounted on the cabin frame, but wiring may be damaged by the drill causing fine damage or fire risk
Solution Approach 1:
The invention divides the mounting system into separate components: a door mounting bar that attaches to the pipe without drilling, and a coupling part that connects the door to the mounting bar. This segmentation allows the mounting function to be achieved while keeping the pipe intact and protecting embedded wiring from drilling damage.
Solution Approach 2:
The door mounting bar serves as an intermediary component between the pipe and the door. It attaches to the pipe surface without penetrating it, and provides mounting points for the door through coupling parts, thereby eliminating the need to drill through the pipe and damaging the wiring.
2Strength
If the pipe thickness is increased to ensure adequate thread thickness for bolt fastening, then fixing force is secured, but manufacturing cost increases and fuel efficiency deteriorates
Solution Approach 1:
The invention moves the threading function from the pipe dimension to the mounting bar dimension. The hinge bracket is formed with threads on its outer surface, providing adequate thread thickness for bolt fastening without requiring increased pipe thickness. This dimensional relocation maintains fixing strength while preserving lightweight pipe structure.
Solution Approach 2:
The invention applies local quality by concentrating the threading feature only where needed - on the hinge bracket that contacts the door - rather than requiring the entire pipe to have increased thickness. This localized approach provides sufficient fixing force at the mounting point while maintaining overall structural efficiency.
3Stability of the object's composition
If adhesive is applied to fastening bolts to prevent loosening, then bolt security is improved, but separation and re-installation of doors becomes difficult
Solution Approach 1:
The invention creates a dynamic fastening system where the coupling part can transition between locked and unlocked states. The elastic deformation of the coupling part enables reversible engagement with the engagement coupling part, allowing easy separation and re-installation without adhesive while maintaining operational stability during use.
Solution Approach 2:
The coupling part is designed with elastic curvature that allows it to deform and lock into the engagement coupling part, providing stable fixation during door operation. The same elastic curvature enables easy release by applying force to overcome the elastic lock, facilitating simple separation without adhesive.
4Ease of manufacture
If drilling holes are created for mounting operations, then doors and windows can be installed, but the forklift appearance is compromised and corrosion occurs
Solution Approach 1:
The invention segments the mounting function from the pipe structure itself, using a separate door mounting bar that attaches to the pipe surface. This prevents drilling holes in the pipe, maintaining the pipe's original appearance and corrosion resistance while still enabling door and window installation.
Solution Approach 2:
The door mounting bar acts as an intermediary that attaches to the pipe without penetrating it. This mediator provides mounting capabilities for doors and windows while preserving the integrity, appearance, and corrosion resistance of the underlying pipe structure.
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
This method enables secure, drill-free mounting of doors and windows, preventing wiring damage and fires, simplifying assembly and detachment, reducing manufacturing costs, and maintaining the forklift's original appearance while preventing corrosion.
Implementation Method 1
The door mounting bar is attached by applying an adhesive to prevent the pipe of the cabin from loosening.
Data Source
AI summary
The present invention relates to a forklift capable of mounting a door in a state in which a pipe for forming a cabin frame is not drilled, the forklift having: a door mounting bar, which is mounted on the outer surfaces of rear pipes at both left and right surfaces of the cabin frame of the forklift, has a bent part formed at the upper end thereof, and has a fastening part formed on one side surface thereof by bending so as to be positioned at the rear surface of the rear pipe; a rear window frame which is mounted between both the left and right rear pipes at the rear of the cabin frame and is formed as a square frame having, at both the left and right sides thereof, engagement fastening parts coupled to the fastening part of the door mounting bar; connecting brackets which simultaneously fasten the door mounting bar and the rear window frame while coming in close contact with the rear pipe at the inner side of the cabin frame; and a hinge bracket which is provided at the upper and lower ends of the outer surface of the door mounting bar, is integrally provided with threads so as to ensure the thread thickness of bolt fastening for the assembly of a hinge for opening and closing the door, and has a predetermined thickness.