Hydraulic Motor Integrated Spool Series Parallel Switching
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Solution Overview
Problem
Existing hydraulic motor systems in vehicles require multiple motor exchanges and have high flow resistance due to complex port connections, which complicates integration and efficiency.
Innovation Solution
A radial piston hydraulic motor design with a separate casing and distributor, featuring a movable spool that switches between series and parallel connections, minimizing the number of high-pressure and high-flow ports, and incorporating a drain channel to manage leakage and prevent pressure increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate distributor is used in the hydraulic motor, then the motor can be integrated into existing vehicles with minimal exchange, but the flow resistance increases due to complex port connections
Solution Approach 1:
The distributor is integrated directly into the motor casing as a unitary structure, merging two previously separate components (distributor and casing) into one. This integration eliminates complex external port connections and reduces flow resistance while maintaining adaptability for vehicle installation.
2Adaptability or versatility
If multiple high-pressure and high-flow ports are used for series/parallel switching, then the motor can switch between configurations, but the device complexity increases
Solution Approach 1:
The integrated distributor structure serves multiple functions: it acts as both the distribution element and the casing component, while providing series/parallel switching capability through its internal configuration. This multi-functionality reduces the number of separate ports needed while maintaining configuration flexibility.
3Loss of energy
If a large diameter spool is used for series/parallel switching, then the flow resistance is minimized, but the spool requires precise control to avoid unintentional connections
Solution Approach 1:
A spring element is introduced as an intermediary mechanism to assist in spool positioning and control. The spring provides a restoring force that helps maintain precise spool position, preventing unintentional connections while allowing the large diameter spool to minimize flow resistance during valid switching operations.
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
Enables seamless integration into existing vehicles with minimal motor exchange, reduced flow resistance, and controlled pressure management, ensuring efficient operation and reliability.
Implementation Method 1
a spring urges the spool into the first or into the second position
Implementation Method 2
the casing has a drain channel which connects the spool to an interior of the casing. The interior of the casing is preferably connected to a tank
Data Source
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AI summary
The invention concerns a hydraulic motor (40) with a casing (50) which has a first (51) and a second (52) working port, wherein there is a rotor (70) inside the casing (50), wherein there is a first (41) and a third chamber (43), wherein the first chamber (41) is permanently connected to a plurality of first openings (61) in the end face (63), wherein the third chamber (43) is permanently connected to a plurality of second openings (62) in the end face (63), wherein the first chamber (41) is permanently connected to the first working port (51). According to the invention the casing has a third working port (53), wherein there is a second (42) and a fourth (44) chamber, wherein the second chamber (42) is permanently connected to the second working port (52), wherein the fourth chamber (44) is permanently connected to the third working port (53), wherein there is a movable spool (80) located inside the casing (50), which has a first and a second position (82; 83), wherein in the first position (82) there is a connection from the third chamber (43) to the second chamber (42) via the spool (80), wherein in the second position (83) there is a connection from the third chamber (43) to the fourth chamber (44) via the spool (80) and a connection from the first chamber (41) to the second chamber (42) via the spool (80).