Pilot Valve Boot Mounting with Compressed Anchor
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Solution Overview
Problem
The existing pilot valve assemblies face challenges in mounting dustproofing boots due to difficulties in forming annular stopper grooves on flat end plates, requiring additional parts and time-consuming adjustments, and limited installation space in console boxes, making the process cumbersome and inefficient.
Innovation Solution
The pilot valve assembly features a boot with thick lip end anchor portions, a stopper groove around the cam member, and a mount member with openings that grip the root end anchor portion in a compressed state, allowing for easy and accurate fitting, using bolts for secure fixation and minimizing installation space with a non-circular bellows portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dustproofing boot is mounted using conventional methods with stopper grooves on the end plate, then hermetic sealing is achieved, but the mounting process becomes time-consuming and complex due to the need to form annular grooves on flat surfaces and perform precise adjustments
Solution Approach 1:
A mount member is introduced as an intermediary component between the end plate and the dustproofing boot. The mount member features a recess that receives the boot's root end anchor portion and uses a compression regulatory member to apply controlled compression, achieving hermetic sealing without requiring complex stopper groove formation on the end plate itself.
Solution Approach 2:
The compression regulatory member changes the compression parameter of the boot's root end anchor portion to achieve optimal sealing. By controlling the compression force through the mount member's recess structure, the system achieves hermetic sealing while simplifying the mounting process and reducing adjustment time.
2Reliability
If additional parts like mount plates are added to form stopper grooves on the end plate, then hermetic sealing is achieved, but the device complexity increases
Solution Approach 1:
The mount member combines multiple functions into a single component: it provides structural support, creates the sealing interface through its recess, and incorporates the compression regulatory member. This merging eliminates the need for separate end plate modifications and reduces the overall number of parts required for achieving hermetic sealing.
Solution Approach 2:
The mount member serves multiple purposes: it acts as a structural mounting element, provides the sealing interface for the dustproofing boot, and regulates compression forces. This multi-functionality reduces the need for additional specialized parts and simplifies the overall assembly structure.
3Ease of operation
If the pilot valve assembly is designed for easy mounting of dustproofing boots, then mounting simplicity is improved, but the installation space requirements may increase
Solution Approach 1:
The dustproofing boot is nested within the recess of the mount member, and the root end anchor portion is received within the recess structure. This nesting arrangement allows the sealing components to be compactly integrated without requiring additional external space, maintaining ease of mounting while respecting installation space constraints.
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 simplifies the mounting of the dustproofing boot, ensuring hermetic sealing and reducing installation time by allowing for precise alignment and secure fixation within the limited space of a console box, enhancing the overall efficiency and compactness of the hydraulic pilot valve assembly.
Implementation Method 1
a boot 40 made of a resilient material... to provide a hermetically sealed space internally of the boot 40
Implementation Method 2
the root end anchor portion 42 of the boot is fixed in position in a compressed state between the end plate 30 and the mount member 21
Data Source
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AI summary
A pilot valve assembly comprised of a pilot valve proper employing a spool to be displaced in a valve casing to bring a hydraulic pressure port and an output port into and out of communication with each other, an operation means having an operating lever with a cam member attached thereto, a pivoting shaft erected on an end plate of the pilot valve proper and connected with the manual operating lever through a universal joint, and a boot of a resilient material hermetically connected between the operation means and the end plate in such a way as to completely enshroud said universal joint, cam member and pusher, the end plate being detachably fixed to the mount member, and the boot having one end thereof connected to the operation means and having the other end hermetically gripped between the end plate and the mount member.