Dual In-Line Pump Linkage Layout for Loader Hose Routing
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Solution Overview
Problem
Existing power machines with dual hydraulic pumps face challenges in fitting mechanical drive control connections and centering mechanisms within limited space, particularly in dual in-line pump packages, which complicates the routing of hydraulic hoses.
Innovation Solution
The implementation of a single in-line pump assembly configuration with pump pintle arm controls and a shared centering mechanism allows separate pump controls to be positioned on either side of the pump, enabling hydraulic connections to be placed on top of the assembly, thereby improving hose routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If dual in-line pump package configuration is used, then hydraulic fluid can be supplied to left and right side travel motors, but mechanical drive control connections and centering mechanisms cannot fit within limited space
Solution Approach 1:
The patent positions the separate pump controls on the side of the pump assembly one behind the other along the longitudinal axis, and places hydraulic connections on top of the pump assembly. This spatial reconfiguration across different dimensions (side vs. top positioning) resolves the space conflict by utilizing previously unused spatial zones.
Solution Approach 2:
The patent separates the control mechanisms for each pump into distinct, independently positionable components. By segmenting the control system, each pump can have its controls positioned optimally without interfering with the other pump's components, allowing efficient use of limited space.
2Ease of operation
If separate pump controls are positioned optimally, then hydraulic connections routing is improved, but device complexity increases
Solution Approach 1:
The patent employs a shared centering mechanism that serves both pumps simultaneously. This universal component reduces overall device complexity by eliminating the need for separate centering mechanisms for each pump, while still allowing individual control positioning for optimal hydraulic routing.
Data Source
AI summary
Disclosed are power systems, and power machines employing the power systems, having dual in-line pumps configured to supply hydraulic fluid to respective left and right side travel motors of the power machine. In some exemplary embodiments, pump pintle arm controls and a single centering mechanism for the pintle arm controls are provided. The single centering mechanism is configured to center the pintle arms for each of the two pumps. Also in some exemplary embodiments, a mechanical control linkage configuration allows the separate pump pintle arm controls to be positioned on a side of the pump substantially one behind the other. This allows hydraulic connections to the pumps to be placed on top of the pump assembly, improving the routing of hydraulic hoses in the power machine.