Rotary Throttle Assembly for Concrete Vibrator Power Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Linkage-type throttles for engine-driven vibrators are prone to malfunction due to hardened concrete deposits, which can inhibit operation and allow operators to inadvertently operate below the minimum speed required for effective concrete consolidation.
Innovation Solution
A rotatable throttle assembly with most moving parts enclosed, allowing hands-free operation and ensuring the throttle handle is the only exposed part, preventing concrete splatter from affecting the mechanism and maintaining consistent power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a linkage-type throttle with exposed lever and cable is used, then the operator has full control of the throttle, but wet concrete deposited on the exposed parts solidifies and prevents the throttle lever from moving to the desired power setting
Solution Approach 1:
The patent removes the exposed cable and pivot from the throttle mechanism, extracting the components that are vulnerable to concrete contamination. The throttle control is reconfigured to use a rotary dial with enclosed internal linkages, eliminating the external cable that connects to the engine carburetor. This extraction of vulnerable components resolves the contradiction by maintaining operational control while preventing concrete buildup on exposed parts.
Solution Approach 2:
The patent employs an enclosed housing that contains the throttle linkage mechanism, protecting internal components from concrete splatter. The rotary dial operates within a sealed compartment, preventing concrete deposits from interfering with the linkage movement. This enclosure approach maintains reliability by isolating the mechanism from harmful environmental factors while preserving ease of operation through the external rotary interface.
2Ease of operation
If a linkage-type throttle with exposed parts is used, then the operator can control the throttle, but hardened concrete on the throttle inhibits movement and prevents reaching the minimum speed required for good consolidation
Solution Approach 1:
The patent extracts the exposed cable and lever components that accumulate concrete, replacing them with an enclosed rotary dial mechanism. This eliminates the source of the problem where concrete deposits prevent adequate throttle opening, ensuring the engine can consistently reach the 10,000-12,000 rpm range required for proper concrete consolidation while maintaining operator control through the rotary interface.
Solution Approach 2:
The enclosed housing of the rotary throttle assembly protects the internal linkage from concrete contamination, ensuring reliable transmission of the operator's control inputs to the engine throttle. This enclosure prevents concrete buildup that would otherwise inhibit throttle movement and prevent the engine from reaching the speed necessary for effective concrete consolidation, thereby maintaining productivity and consolidation quality.
3Ease of operation
If the throttle lever and cable are exposed for manual control, then the operator can adjust power settings, but concrete splatter on the operator's hands gets deposited on the throttle during operation
Solution Approach 1:
The patent implements an enclosed housing that contains the throttle linkage mechanism, creating a physical barrier that prevents concrete splatter from depositing on the control components. The operator interacts with the external rotary dial, which is positioned to minimize exposure to concrete spray, while the internal linkage operates within a protected environment. This enclosure approach effectively isolates the throttle mechanism from harmful concrete contamination while preserving full operational control.
Solution Approach 2:
The patent removes the exposed cable and lever that are directly in the path of concrete splatter, extracting these vulnerable components from the contamination zone. The rotary dial mechanism is reconfigured with enclosed linkages that do not extend into areas where concrete is likely to be splattered during vibrator operation, thereby eliminating the deposition problem while maintaining ease of operation.
4Adaptability or versatility
If a linkage-type throttle is used, then the operator has full control including the ability to operate below minimum speed, but this allows unintentional or deliberate operation below the desired power setting
Solution Approach 1:
The patent incorporates a rotary dial mechanism with detent positions or indexed settings that guide the operator to specific power settings, including the minimum required speed for consolidation. The dynamic rotation of the dial provides tactile feedback and distinct positional stops, making it difficult to inadvertently set the throttle below the desired range while still allowing intentional adjustment across the full operational spectrum when needed.
Data Source
AI summary
A rotary throttle assembly is disclosed for operating a power unit such as an engine or a motor in either a first power setting or a second power setting. The rotary throttle assembly may be used in a concrete vibrator to operate the vibrator in either an idle power setting or a desired power setting. The throttle assembly includes a rotatable throttle handle, a linkage mechanism contained in a casing, and means for urging the throttle assembly selectively to adopt a first position or a second position.