Electric Hydraulic Pump Fixture for Compact Work Vehicle Mounting
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Solution Overview
Problem
As work vehicles transition towards electrification of drivetrain and systems, there is a need for an efficient and compact method to supply hydraulic power using electrical energy, particularly in architectures that previously relied on diesel engines and hydraulic circuits.
Innovation Solution
A hydraulic pump drive assembly that includes an electric machine to convert electrical energy into rotary motion, coupled with a hydraulic pump, and a fixture that rigidly mounts these components to the work vehicle, allowing for direct fixation and efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a diesel engine directly drives hydraulic pumps in traditional architectures, then hydraulic power is supplied efficiently, but the system complexity increases and adaptability to electrification decreases
Solution Approach 1:
The patent segments the power transmission system by introducing a separate electric machine (motor or generator) that couples between the diesel engine and hydraulic pump. This segmentation allows the hydraulic pump to be independently driven by electrical power while the diesel engine operates separately, enabling flexible electrification configurations without redesigning the entire power transmission system.
Solution Approach 2:
The electric machine serves multiple functions: it can operate as a motor to drive the hydraulic pump during electrified operation, or as a generator to recover energy during regenerative braking. The fixture structure also provides universal mounting capabilities for different rotary machine configurations, making the system adaptable to various powertrain architectures.
2Reliability
If extensive mechanical coupling is used to connect hydraulic pumps to the work vehicle, then rigid fixation is achieved, but the arrangement becomes less compact and more complex
Solution Approach 1:
The patent merges the mounting fixture and coupling mechanism into a single integrated assembly. The fixture simultaneously provides structural support, rigid fixation to the work vehicle chassis, and mechanical coupling between the electric machine and hydraulic pump, eliminating the need for separate coupling components and reducing overall system complexity.
Solution Approach 2:
The fixture acts as an intermediary component that mediates between the electric machine and hydraulic pump, providing both mechanical support and power transmission. This intermediary structure simplifies the connection by consolidating multiple functions into a single component rather than requiring extensive mechanical coupling.
3Use of energy by moving object
If the hydraulic pump is directly driven by the diesel engine, then power transmission is efficient, but the system cannot utilize electrical energy storage
Solution Approach 1:
The patent replaces the direct mechanical coupling between diesel engine and hydraulic pump with an electrical intermediary. The electric machine converts electrical energy from storage systems into rotational motion to drive the hydraulic pump, substituting the direct mechanical drive path with an electromechanical conversion path that enables electrical energy utilization.
Solution Approach 2:
The system enables parameter changes in the power source by allowing the hydraulic pump to be driven by different energy sources (electrical or mechanical) depending on operational requirements. The electric machine's rotational speed and torque can be independently controlled, providing flexibility in power delivery characteristics that differs from direct engine coupling.
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 provides a compact and flexible arrangement for coupling hydraulic pumps to the work vehicle's chassis, enabling the use of electrical energy to power hydraulic systems without extensive mechanical coupling, enhancing the ability to supply hydraulic power as the vehicle electrifies.
Implementation Method 1
an electric machine configured to convert electrical energy from an electrical supply line to rotary motion
Implementation Method 2
a hydraulic pump configured to circulate the hydraulic fluid through a hydraulic supply line from the rotary motion of the electric machine
Data Source
AI summary
A rotary machine fixture couples a first rotary machine to a second rotary machine and fixes the first rotary machine and the second rotary machine to a work vehicle. A hydraulic pump drive assembly to supply hydraulic fluid for a work vehicle includes an electric machine configured to convert electrical energy from an electrical supply line to rotary motion, a hydraulic pump configured to circulate the hydraulic fluid through a hydraulic supply line from the rotary motion of the electric machine, a fixture having a first rotary machine interface configured to mount the electric machine to the fixture, a second rotary machine interface configured to mount the hydraulic pump to the fixture, and a work vehicle interface configured to mount the fixture to the work vehicle such that the hydraulic pump and the electric machine are fixed to the work vehicle through the fixture.