Split-Gearbox Concrete Pump Truck Drive for Quiet Stationary Pumping
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Solution Overview
Problem
Truck-mounted concrete pumps generate undesirable noise and exhaust emissions during stationary operation due to diesel-hydraulic drives, particularly problematic in urban construction sites.
Innovation Solution
Equipping the truck-mounted concrete pump with an electric motor that can drive the hydraulic pump device, allowing for either electric or diesel engine operation, with a branching gearbox for selective torque transmission, enabling hybrid diesel-electric or fully electric operation to reduce emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a diesel engine drives the hydraulic pumping device during stationary pumping operation, then the truck-mounted concrete pump can operate independently without external power supply, but it generates undesirable noise and exhaust emissions
Solution Approach 1:
The patent segments the power supply system into two independent parts: an electric motor for stationary pumping operation and a diesel engine for travel and emergency operation. This segmentation allows the system to switch between clean electric power during stationary work and independent diesel power during movement or emergencies, resolving the contradiction between reducing emissions and maintaining operational independence.
Solution Approach 2:
The truck-mounted concrete pump is designed with multi-functionality to operate in two distinct modes: electric motor-driven mode for stationary pumping (reducing emissions) and diesel engine-driven mode for travel and emergency operations (maintaining independence). The hydraulic pumping device can receive power from either source, making the system universally adaptable to different operational requirements.
2Object-affected harmful factors
If an electric motor is added to drive the hydraulic pumping device, then exhaust emissions are reduced during stationary operation, but the device complexity increases
Solution Approach 1:
The patent merges the electric motor and diesel engine into a unified power transmission system through a common hydraulic pumping device and a dual-input transmission mechanism. Both power sources connect to the same hydraulic system, allowing seamless switching between electric and diesel power without requiring separate complete drive systems, thus reducing the overall complexity increase.
Solution Approach 2:
The hydraulic pumping device serves as an intermediary between the two power sources (electric motor and diesel engine) and the concrete pumping system. This intermediary allows flexible power source selection and switching without directly coupling both engines to all components, simplifying the integration of the dual-drive system.
3Adaptability or versatility
If the diesel engine is used as the primary drive, then the truck-mounted concrete pump maintains simplicity and reliability, but it cannot operate without emitting exhaust gases in stationary mode
Solution Approach 1:
The patent implements a dynamic power source selection system where the operating mode (electric or diesel) can be flexibly switched based on operational requirements. The system dynamically adapts between emission-free electric operation during stationary pumping and diesel operation during travel or emergencies, making the transition between different operational states smooth and controllable.
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 solution minimizes diesel exhaust emissions during stationary pumping by primarily using the electric motor, while allowing alternative diesel engine operation in case of energy shortages, maintaining compatibility with standard truck chassis and reducing noise pollution.
Implementation Method 1
an electric motor (14) that is adjoined to the branching transmission (10) and is configured to drive the hydraulic pumping device (4)
Implementation Method 2
at least one hydraulic pump (4) for driving a hydraulically driven pump unit (5), in particular a pump cylinder
Data Source
Figure 1~2
AI summary
The invention relates to a truck-mounted concrete pump with at least one drive motor and a hydraulic pumping device for pumping liquid concrete, wherein at least one electric motor is provided and the hydraulic pumping device can be driven either by the at least one drive motor or the at least one electric motor, characterized in that the drive motor is connected via a power take-off of a distribution gearbox of the drive train of the truck-mounted concrete pump to a split gearbox, wherein a first gearbox input of the split gearbox is coupled to the power take-off of the drive motor and a second gearbox input is coupled to the electric motor and the gearbox output of the split gearbox is connected to at least one hydraulic pump of the hydraulic pumping device.