Impact Piston Valve Housing Integration for Faster Hydraulic Response
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Solution Overview
Problem
Existing impact piston devices for impact drill drives, particularly in earth and rock drilling machines, suffer from delayed response characteristics due to longer hydraulic fluid paths and loose connections, leading to inefficiencies in the actuation and adjustment of the impact piston.
Innovation Solution
The integration of both control valves into a common valve housing with a robust metal valve block design, featuring milled fluid lines and valve receptacles, reduces fluid path lengths and minimizes leakage, resulting in a faster and more efficient actuation and adjustment of the impact piston with improved mechanical robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If control valves are arranged separately with longer hydraulic fluid paths, then the device structure is simpler and easier to manufacture, but the response characteristic is delayed and actuation efficiency is reduced
Solution Approach 1:
The patent combines multiple control valves into a single common valve housing, integrating what were previously separate components. This merging reduces the overall fluid path length between the valves and the impact piston, thereby improving the response characteristic and actuation efficiency while maintaining a manageable device structure through systematic integration
2Reliability
If longer hydraulic fluid paths and loose connections are used, then the device is easier to assemble and maintain, but leakage risk increases and response time decreases
Solution Approach 1:
By integrating the control valves into a common valve housing with fixed internal connections, the patent eliminates loose external connections that are prone to leakage. The merged design maintains assembly simplicity through modular construction while significantly improving reliability by reducing leakage points and securing fluid paths within the integrated housing structure
3Productivity
If separate control devices with longer lines are used, then the device is more flexible in installation, but the volume of liquid in lines increases and response efficiency is reduced
Solution Approach 1:
The integration of control valves into a common valve housing dramatically reduces the volume of hydraulic fluid required in the lines by eliminating long external connections. This reduction in fluid volume directly improves actuation efficiency and response time, as less fluid needs to be moved and pressurized to achieve the same piston actuation effect
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 configuration enhances the response characteristic of the impact piston device, enabling faster and more efficient operation with a more compact and robust design, reducing the risk of mechanical failures and improving drilling efficiency in hard materials like stone and rock.
Implementation Method 1
a hydraulic feed 30 with lines 30a, 30b, 30c, 30d, 30e, 30f, 30g, 30h, 30i, 30j, 30k, 30l, 30m, 30n, 30o, 30p, 30q, 30r, 30s, 30t, 30u, 30v, 30w, 30x, 30y, 30z
Implementation Method 2
the larger pressurizing surface at the impact piston effects an axial shift against the preload direction
Data Source
AI summary
The invention relates to an impact piston device for an impact drill drive, comprising an impact piston, which is movably mounted in a piston housing so as to be reversible between a front striking position and a rear retracted position, the impact piston having at least one front pressurizing surface and at least one rear pressurizing surface, at least one front pressure chamber and a rear pressure chamber being formed together with the piston housing, a hydraulic fluid feed, a hydraulic fluid drain, a first control device, by which at least the rear pressure chamber for effecting the reversing movement of the impact piston is connected alternately to the hydraulic fluid feed and the hydraulic fluid drain, and a second control device, with which at least one stroke path of the impact piston within the piston housing can be adjusted, the first control device having an actuatable first control valve and the second control device having an actuatable second control valve. According to the invention, it is provided that the first control valve and second control valve are arranged in a common valve housing.