Tire Pressure Sensor Casing Split Design for Centrifugal Force Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tire air-pressure detection devices face challenges in withstanding high centrifugal forces during high-speed vehicle travel, leading to increased weight, complex assembly, and maintenance difficulties due to the use of small bolts or integral molding.
Innovation Solution
A tire air-pressure detection device with an elongated casing featuring a split-type design, where the first and second casing portions are joined by hook and hook hole joint portions around the mounting hole and longitudinal ends, housing the pressure sensor and battery, and connected to the tire valve via a nut with a coil spring for resilient mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If small bolts are used to assemble split casings, then the device can be disassembled for maintenance, but the number of parts increases and assembly time is extended
Solution Approach 1:
The casing is divided into two separate casings that can be assembled and disassembled. This segmentation allows the detector and battery to be accessed for maintenance while using a simplified connection method (protrusion and groove) rather than multiple small bolts, thus maintaining ease of repair without significantly increasing device complexity
Solution Approach 2:
The connection structure merges the fastening function with the structural design by integrating the protrusion and groove directly into the casing portions. This eliminates the need for separate fasteners (bolts), reducing the number of parts while still allowing easy disassembly for maintenance
2Device complexity
If integral molding is used for the outer casing, then the structure is simplified and fewer parts are used, but disassembly for battery replacement and sensor maintenance becomes difficult
Solution Approach 1:
The integral molding is segmented into two separate casings connected by a simple protrusion-groove interface. This allows the casing to be easily separated for maintenance (battery replacement and sensor access) while maintaining structural simplicity through the straightforward connection design
Solution Approach 2:
The protrusion and groove are pre-formed as integral parts of the respective casings during molding. This preliminary action ensures that no additional fasteners or complex assembly steps are needed, making disassembly for maintenance simple while keeping the overall structure straightforward
3Strength
If a large number of small bolts are used to join casings, then the joining force against centrifugal force is enhanced, but the device weight increases
Solution Approach 1:
The complex fastening system (multiple small bolts) is extracted and replaced with a simpler protrusion-groove connection. This reduction in fastening complexity decreases device weight while the protrusion-groove design is positioned to provide sufficient joining force against centrifugal forces during high-speed rotation
4Device complexity
If the mounting hole is positioned at the longitudinal center, then the casing structure is simplified, but the resistance against centrifugal force may be reduced
Solution Approach 1:
The mounting hole position is merged with the center of gravity location. By positioning the mounting hole at the longitudinal center where the center of gravity naturally lies, the structure is simplified without compromising centrifugal force resistance, as the mounting point aligns with the balance point of the rotating device
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 effectively reduces the number of parts and assembly time while enhancing the joining force against centrifugal forces, ensuring the device's integrity and ease of maintenance by positioning the pressure sensor and battery to minimize vibrations and prevent interference with the tire rim.
Implementation Method 1
connected to the tire valve via a nut with a coil spring for resilient mounting
Data Source
AI summary
A method and apparatus in accordance with embodiments of the invention includes a tire pressure detection device comprising an elongated casing having a first casing portion and a second casing portion, configured to house a pressure sensor and the battery therein. The elongated casing also includes a mounting hole for accommodating a connection member configured to connect the casing to a tire valve. The mounting hole is disposed, in one embodiment, and at approximately longitudinal center portion thereof. The first casing portion and the second casing portion are joined to each other by joint portions comprising a hook formed on one of the first casing portion and the second casing portion, and a hook hole formed in another of the first casing portion and the casing portion. The joint portions are located around the mounting hole and both longitudinal ends of the casing. The casing is configured such that a tire valve penetrates a rim of the tire wheel from an outside to an inside thereof.