Spring Balancer Disassembly Using a Threaded Cylindrical Jig
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Solution Overview
Problem
Existing spring balancer apparatuses require the use of a press machine to relieve compression force during disassembly, which is inconvenient and may not be available in all settings, making it difficult to disassemble and maintain these devices.
Innovation Solution
A spring balancer apparatus design that includes a cylindrical body, a shaft with external threads, flange members, and a disassembly method using a cylindrical jig with internal and external threads to relieve compression force without a press machine, allowing for easy disassembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a press machine is used to relieve compression force during disassembly, then the compression force can be effectively relieved, but the disassembly process becomes inconvenient and requires specialized equipment not available in all settings
Solution Approach 1:
A cylindrical jig is introduced as an intermediary tool to relieve compression force. The jig includes a pressing portion that contacts the compression spring and a threaded portion that engages with the shaft. By rotating the jig, the compression force is gradually relieved without requiring a press machine, making disassembly convenient and accessible in various settings.
Solution Approach 2:
The spring balancer apparatus is designed to be self-serviceable for disassembly. The threaded portion on the shaft allows the cylindrical jig to engage directly with the apparatus components. By simply rotating the jig, users can independently relieve compression force and disassemble the apparatus without external specialized equipment.
2Reliability
If the compression spring is initially loaded with compression force before mounting, then the spring balancer can assist power of the industrial robot, but disassembly becomes difficult without specialized equipment
Solution Approach 1:
The cylindrical jig serves as a mediator that bridges the compressed spring state and the disassembled state. The pressing portion of the jig transfers rotational motion into linear motion to gradually decompress the spring, while the threaded portion provides mechanical engagement with the shaft, enabling safe and easy disassembly while maintaining the reliability of the power assistance function during operation.
3Adaptability or versatility
If the shaft is made movable in the longitudinal direction for power assistance, then the spring balancer can assist robot motion, but the compression force creates difficulty in disassembly
Solution Approach 1:
The cylindrical jig with its threaded portion engaging the shaft acts as an intermediary that converts the compression force problem into a controlled disassembly process. The pressing portion contacts the compression spring while the threaded portion provides mechanical advantage through rotation, enabling easy disassembly operations while preserving the motion assistance capability during normal operation.
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 easy disassembly and maintenance of the spring balancer apparatus without the need for a press machine, facilitating site-based disposal and replacement of components, while preventing dust and mist entry through a removable lid.
Implementation Method 1
a compression spring positioned in a compressed state between the front end plate and the flange
Implementation Method 2
which is initially loaded with a compression force before the spring balancer apparatus is mounted on the industrial robot
Implementation Method 3
the another end of the shaft is provided with a first external thread
Data Source
AI summary
In a spring balancer apparatus, a flange includes a through-hole and a first and second flange member, the first flange member positioned radially inside a compression spring and removably held on another end of the shaft by a first nut member fastened to a first external thread on the shaft, the second flange member including a central hole and removably fixed to an outer periphery of the first flange member from a rear end plate side. The rear end plate of a casing includes an abutting part on which an outer periphery of the second flange member abuts, and an opening through which a surface of the second flange member is externally exposed at a position radially inside the abutting part and radially outside the central hole. At least one of a front end plate and the rear end plate is removably fixed to a cylindrical body of the casing.