Engine Operating Cable Merging Stop Switch Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing engine operating devices for working machines, such as tillers, require complex assembly due to the need for a dedicated harness to route a stop switch from the engine to the handle, increasing the number of assembly steps and operational complexity.
Innovation Solution
An engine operating device with a control assembly that includes a base member, a stop switch, a lever member, and an operating cable with a throttle wire and a stop wire, where the lever member moves between push and release positions to control the engine stop, eliminating the need for a dedicated harness and allowing both throttle adjustment and stop switch operation with a single operating cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dedicated harness is routed from the engine to the handle for the stop switch, then the stop switch can be disposed adjacent to the handle for easy access, but the assembly work becomes complicated and the number of assembly steps increases
Solution Approach 1:
The patent combines the stop switch operation with the existing operating cable system. The operating cable now serves dual purposes: controlling the throttle via the throttle wire and operating the stop switch via the stop wire. This merging eliminates the need for a separate dedicated harness, reducing assembly complexity while maintaining ease of operation through the existing cable routing.
Solution Approach 2:
The operating cable is designed with multi-functionality, incorporating both throttle control and stop switch operation within a single cable assembly. The cable tube contains both the throttle wire and stop wire, allowing one cable to perform multiple functions. This universal approach reduces the number of components and simplifies installation while providing both throttle adjustment and engine stop capabilities.
2Adaptability or versatility
If a dedicated harness is routed for the stop switch, then the stop function can be independently controlled near the handle, but the number of parts and assembly steps increases
Solution Approach 1:
The patent merges the stop switch operation into the existing operating cable system. Instead of adding a separate harness and switch near the handle, the stop switch is integrated into the control assembly and operated through the same cable mechanism that controls the throttle. This reduces the quantity of parts while maintaining independent stop control capability through the lever member's movement.
Solution Approach 2:
The operating cable assembly is designed as a universal control system that handles both throttle adjustment and engine stop functions. By incorporating both the throttle wire and stop wire within the same cable tube and connecting them to the same operating member, the system achieves multi-functionality with reduced part quantity.
3Reliability
If the stop switch is attached adjacent to the engine, then the quality function is stabilized, but the routing becomes more complex compared to handle-mounted switches
Solution Approach 1:
The patent combines the stop switch with the control assembly that is already positioned adjacent to the engine. By integrating the stop switch into this existing assembly and using the same operating cable for both throttle and stop functions, the cable routing becomes straightforward rather than complex. The lever member's movement simultaneously controls both functions, eliminating the need for separate routing paths.
Data Source
AI summary
An engine operating device of a working machine includes a control assembly installed in a body, an operating lever mounted on a handle, and an operating cable. The control assembly includes a base member, a stop switch secured to the base member, and a lever member supported by the base member. The operating cable includes a throttle wire, a stop wire, and a cable tube in which the throttle wire and the stop wire are fitted. As the operating lever is moved to an engine stop position, the lever member moves to a release position, causing an engine to stop.