Hydraulic Pump Motor Valve Assembly for Compact Dual-Chamber Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing hydraulic pump devices have a complex structure due to separately disposed valve elements, leading to a large size in the up-down direction and mechanical complexity.
Innovation Solution
A compact motor design with a supply/discharge valve mechanism that simultaneously controls the flow of pressure fluid between two motor chambers using a single assembly of valve members and a protrusion, along with auxiliary springs to prevent intermediate position movement, resulting in a mechanically simple and compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If valve elements are separately disposed in the housing, then each valve element can be independently controlled, but the device size increases in the up-down direction and the structure becomes complicated
Solution Approach 1:
The patent combines multiple valve elements (switching valve element and supply valve element) into a single integrated valve assembly. The switching valve element and supply valve element are positioned at different heights on the same valve body, allowing independent control through a single actuator mechanism. This merging reduces the overall device size in the up-down direction while maintaining independent operational control of each valve function.
2Ease of operation
If valve elements are separately disposed in the housing, then each valve element can be independently controlled, but the device structure becomes complicated
Solution Approach 1:
The patent integrates multiple valve elements into a single valve body structure, reducing the number of separate components. The switching valve element and supply valve element share a common valve body and actuator mechanism, simplifying the overall structure while enabling independent control of each valve function through the integrated design.
Solution Approach 2:
The single valve assembly performs multiple functions: the switching valve element controls compressed air supply to the forward movement actuation chamber, while the supply valve element controls compressed air supply to the return movement actuation chamber. This multi-functional integrated valve reduces structural complexity compared to separate valve elements.
3Device complexity
If a single supply/discharge valve controls both motor chambers, then the structure becomes mechanically simple and compact, but reliable simultaneous control of both chambers is required
Solution Approach 1:
The patent uses a single supply/discharge valve assembly that simultaneously controls both motor chambers. The valve body includes positioned valve elements (first valve member and second valve member) that respond to pressure fluid in a common actuation chamber, ensuring coordinated control of both chambers while maintaining structural simplicity and compactness.
Solution Approach 2:
The valve mechanism incorporates feedback through pressure fluid from the motor chambers that acts on the valve elements. When pressure fluid is supplied to the actuation chamber, it moves the valve elements to appropriate positions, and the valve elements in turn control the supply and discharge of pressure fluid to the motor chambers, creating a reliable feedback control system.
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
The solution provides a compact and mechanically simple hydraulic pump device with reliable fluid control, preventing operational failures and ensuring consistent hydraulic oil discharge in both forward and return strokes.
Implementation Method 1
the first valve member is biased by the first spring toward the first end side when the supply/discharge valve has been moved to the first position
Implementation Method 2
the second valve member is biased by the second spring toward the second end side
Implementation Method 3
the supply/discharge valve body moves the first valve member toward the second end side via the protrusion... the supply/discharge valve body moves the second valve member toward the first end side via the protrusion
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A piston (8) is provided in a motor main body (4). A first motor chamber (9) is provided above the piston (8) and a second motor chamber (10) is provided below the piston (8). A pilot valve element (18) is provided so as to protrude from the piston (8). When a supply/discharge valve (13) is moved to its upper limit position or its lower limit position by the movement of the pilot valve element (18) in an up-down direction, a first valve member (25) of the supply/discharge valve (13) switches between supplying and discharging pressure fluid to and from the first motor chamber (9) and a second valve member (26) of the supply/discharge valve (13) switches between supplying and discharging pressure fluid to and from the second motor chamber (10).