Tire Carcass Building Drum with Motor-Driven Bellows Carrier
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Solution Overview
Problem
Conventional tire carcass building drums are not suitable for manufacturing tires with dimensions 13 inches or smaller due to the minimum diameter limitation imposed by pneumatic lines around the shaft, which restricts core centering device effectiveness.
Innovation Solution
The device allows for variable expansion of the core centering device's diameter by eliminating pneumatic lines and using a motor-driven mechanism to adjust the bellows support's axial position, enabling production of smaller tire dimensions with reduced changeover times and increased flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pneumatic lines are arranged around the shaft of the sliding box to drive the bellows carrier, then the bellows carrier can be driven pneumatically, but the minimum diameter of the core centering device is increased, making it unsuitable for small tire dimensions
Solution Approach 1:
The patent removes the pneumatic lines and pneumatic drive mechanism from the system. Instead of using pneumatic actuation, the bellows carrier is now driven mechanically through the sliding box, which eliminates the space-consuming pneumatic lines that previously prevented small tire dimension production
Solution Approach 2:
The patent replaces the pneumatic drive system with a mechanical drive system. The sliding box mechanically couples the drive shaft to the bellows carrier, substituting the pneumatic actuation mechanism with a direct mechanical transmission that occupies minimal space
2Device complexity
If the bellows carrier is driven pneumatically with lines around the shaft, then the drive mechanism is simple, but the device cannot produce tires of 13 inches or smaller
Solution Approach 1:
The sliding box mechanism serves multiple functions: it transmits mechanical power from the drive shaft to the bellows carrier, provides precise positioning capability, and enables the system to accommodate various tire sizes including small 13-inch tires. This multi-functional design replaces the specialized pneumatic system
3Stability of the object's composition
If conventional building drums are used with fixed diameter core centering devices, then the structure is stable, but the device cannot be adapted to different tire dimensions efficiently
Solution Approach 1:
The patent introduces dynamic adjustability to the core centering device through the sliding box mechanism. The bellows carrier can now be positioned at different locations along the drive shaft, allowing the effective diameter of the core centering device to be varied. This dynamic capability enables efficient adaptation to different tire dimensions while maintaining structural stability during 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 the production of tire carcasses for 13-inch tires or smaller with shorter dimension changeover times and improved flexibility, as well as precise diameter adjustments for different tire dimensions.
Implementation Method 1
the diameter of the bellows carrier on the side of the sliding box is increased or decreased radially with a motor drive
Implementation Method 2
the sliding box is driven to be movable in the axial direction with a spindle
Implementation Method 3
the extension mechanism of the stamp is operated pneumatically. This ensures that if the distances between the two shaft ends are different, there is always an evenly high contact pressure
Implementation Method 4
The plunger has face teeth for engaging in the opposite shaft end of the drive shaft for the building drum. The spur gearing ensures effective power transmission or torque transmission between the two shaft ends
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a device for constructing a carcass for a vehicle tire. In order to provide a device with which the core centering devices can be expanded variably in diameter, wherein the core centering devices can be used at the same time for producing small tire dimensions, and with which at the same time the diameter of the diaphragm supports can be moved by a motor, it is proposed that the diaphragm support (3) on the side of the movement box (1) be connected to the shaft (10) of the movement box (1) in a fixed manner, wherein the axial distance for determining the carcass width of the vehicle tire to be produced between the diaphragm support (3) and building drum (5) occurs through positioning of the movement box (1) in the axial direction (12), and the diaphragm support on the side of the headstock is movably attached to the shaft, wherein the axial distance for determining the carcass width of the vehicle tire to be produced between the diaphragm support (6) and building drum (5) occurs through positioning in the axial direction.