Rotary Telehandler Cab Access Paths for Angled Tower Egress
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Solution Overview
Problem
Prior art rotary telehandlers pose safety risks and inefficiencies when operators need to exit or enter the cab while the tower is angled, as the door alignment complicates safe access and exit procedures, especially when the tower is set at an angle with the door facing towards the rear, making the operation hazardous.
Innovation Solution
The rotary telehandler design features a frame with symmetrical, obstacle-free ascending and descending paths on both sides, allowing safe entry and exit regardless of the tower's angular position, with multiple configurations and a door actuation system that can be fully or partially opened to facilitate access, including a gas spring and linear actuator mechanism for automatic door positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator exits the cab when the tower is angled with the door facing towards the rear, then the operator can leave the vehicle, but the operation becomes really dangerous due to the overall dimensions represented by the door
Solution Approach 1:
The door system is segmented into a main door and a rear door that can open independently. The rear door creates a separate exit path that bypasses the hazardous area behind the cab, allowing operators to exit safely even when the tower is angled with the door facing rearward. This segmentation eliminates the need to navigate through the dangerous zone created by the main door's overall dimensions.
Solution Approach 2:
The rear door acts as an intermediary element that provides an alternative access path. Instead of directly exiting through the main door which creates hazards when angled rearward, the rear door serves as a mediator that redirects the exit path to a safe location, eliminating the harmful effect of the door's overall dimensions in angled positions.
2Object-affected harmful factors
If the operator re-aligns the tower to exit through the door, then the exit path is safe, but the operation becomes tricky and time-consuming
Solution Approach 1:
The rear door is pre-positioned and can be opened independently of the tower alignment. Instead of requiring the operator to first re-align the tower (a preliminary action) before exiting, the rear door provides immediate access regardless of tower position. This eliminates the time-consuming alignment step while maintaining safety.
Solution Approach 2:
The door system is made dynamic by allowing the rear door to open independently of the tower's angular position. This dynamic capability enables the rear door to provide access in any tower configuration, eliminating the need for static alignment procedures and reducing exit time while maintaining safety.
3Adaptability or versatility
If the tower is set at an angle with the door facing towards the front part of the carriage, then the telehandler can operate in various configurations, but the exit operation is already risky when the door is in this position
Solution Approach 1:
The door system is divided into a main door and a rear door that can operate independently. When the tower is angled with the door facing forward, the rear door provides an alternative exit path that bypasses the hazardous area, allowing the telehandler to maintain versatility in tower positioning while eliminating the exit risk associated with forward-facing door angles.
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 design enables safe and efficient operator access and egress from the cab in various tower orientations, reducing the risk of accidents and simplifying the operation by providing multiple free paths and a flexible door mechanism that adapts to different angular positions of the tower.
Implementation Method 1
a door actuation system that can be fully or partially opened to facilitate access, including a gas spring and linear actuator mechanism for automatic door positioning
Data Source
AI summary
Described is a rotary telehandler (1) comprising a carriage (10) movable on wheels, which mounts a tower (11), which in turn mounts a drivers cab (12) and an operating arm. The telehandler (1) is equipped with the following free paths of ascent and descent: a first path, defined by a first position of the tower (11), wherein it has an axis parallel to that of the carriage (10) and comprises a door (15) of the cab (12), a handle (17) on which an operator can grasp and a ladder (101, 104) made on a side wall of the carriage (10); a second path, defined by an angled position of the tower (11), wherein it is oblique or transversal to the axis of the carriage (10), with a front of the cab (12) facing towards the inside of the carriage (10), the second path comprising the door (15), a first handle (16) mounted at a first side of the door (15), a treadable surface (105, 106) of the carriage (10) and a further ladder (102, 103) made in a side of the carriage (10); and a third path, defined by a further angled position of the tower (11), wherein it is oblique or transversal to the axis of the carriage (10), with the front of the cab (12) facing towards the outside of the carriage (10), the third path comprising the door (15), a second handle (17) mounted at a second side of the door (15), a treadable surface (103, 102) of the carriage (10) and a ladder (104, 103) made in a further side of the carriage (10).The first, second and third paths are free of obstacles for the free passage of an operator.