Tire Curing Mechanism Sensor Relocation for Stroke Control
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Solution Overview
Problem
Existing tire curing devices have limited bladder size due to sensor placement, restricting stroke and making it difficult to cure tires of various sizes, and the structure is not easily maintainable or adaptable for different tire sizes.
Innovation Solution
A direct acting mechanism with a clamp portion, hollow cylinder, and center post rod that allows for vertical movement, along with a sensor placed outside the cylinder, enabling flexible sensor use and accurate position detection without limiting stroke, allowing for bladder extension and shaping control across different tire sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensor main body is disposed at the center of the bottom portion of the fluid pressure cylinder, then the structure is compact, but the stroke of the central mechanism is limited and shortened
Solution Approach 1:
The sensor main body is extracted from the central location at the bottom of the fluid pressure cylinder and relocated to the outer circumferential surface. This removes the obstruction caused by the sensor volume at the center, allowing the piston rod to achieve full stroke length without being blocked by the sensor main body, thereby resolving the contradiction between structural compactness and stroke length.
Solution Approach 2:
The sensor main body is repositioned from a central axial location to the outer circumferential surface, utilizing the radial dimension of the cylinder. This dimensional relocation allows the sensor to maintain its monitoring function while no longer interfering with the axial movement of the piston rod, thus preserving both compactness and full stroke capability.
2Length of moving object
If the stroke of the central mechanism is secured by changing the structure of the knock-out lever or lever connecting portion, then the stroke is sufficient, but the equipment cannot be used for general purposes and the device size increases
Solution Approach 1:
By extracting the sensor from the central mechanism's movement path and relocating it to the outer circumferential surface, the original knock-out lever structure and lever connecting portions can be preserved without modification. This maintains the device's adaptability to different tire sizes while achieving sufficient stroke length, avoiding the need for custom structural changes that would reduce versatility.
3Measurement precision
If the sensor is disposed inside the fluid pressure cylinder, then the position detection function is integrated, but the sensor cannot be easily replaced and maintenance becomes difficult
Solution Approach 1:
The sensor main body is extracted from the internal location within the fluid pressure cylinder and positioned on the outer circumferential surface. This external placement allows the sensor to be accessed, removed, and replaced without disassembling the fluid pressure cylinder or interrupting the internal hydraulic system, significantly improving maintenance ease while preserving position detection precision through proper magnetic coupling alignment.
4Reliability
If a rod-shaped sensor with pressure resistance is used inside the fluid pressure cylinder, then the sensor can withstand operating conditions, but the kinds of usable sensors are limited
Solution Approach 1:
By relocating the sensor main body to the outer circumferential surface of the fluid pressure cylinder, the sensor is extracted from the high-pressure internal environment. This allows the use of a wider variety of sensor types including non-pressure-resistant models, as the sensor now operates in atmospheric conditions while still accurately detecting the magnetic field position of the piston rod through the cylinder wall.
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 mechanism allows for precise positional control of bladder extension and shaping heights, accommodating various tire sizes and improving maintainability by reducing sensor limitations and structural constraints.
Implementation Method 1
a sensor portion disposed in a hole portion formed by opening the bottom surface to the outside in a portion of the region between the hollow region and the outer circumferential surface of the cylinder and capable of detecting magnetism
Data Source
AI summary
Provided is a direct acting mechanism of a tire curing device which can sufficiently perform positional control of a bladder extension height and a shaping height, etc., and is applicable to tires of different sizes. A hydraulically-driven central mechanism 1 as an example of a central mechanism of a tire curing device to which the present invention is applied includes a bag head 2 and a hydraulic cylinder 3. A cylinder tube 4 is formed to be thick-walled, and near the outer circumferential surface thereof, a sensor hole portion 7 is provided. The sensor hole portion 7 penetrates to the bottom surface side of the cylinder tube 4, and a linear sensor 8 with heat resistance and flexibility is inserted therein.