Working Vehicle Rocking Mechanism for Direction Conversion
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Solution Overview
Problem
Existing operation mechanisms for working vehicles require complex link mechanisms to convert the direction of rocking operations, complicating the structure and potentially affecting operability.
Innovation Solution
The mechanism employs a first and second rocking member with inclined shaft-shaped portions and a support member to convert rocking operations with a simple configuration, allowing cables to extend along the vehicle's front-back direction and avoiding interference, while using a restriction member to manage rocking and improve operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a complicated link mechanism is used to convert the operation direction of the loader lever, then the direction conversion can be achieved, but the structure becomes complicated
Solution Approach 1:
The operation mechanism is divided into two independent rocking members (first rocking member and second rocking member) that rock about perpendicular shafts. Each rocking member handles one dimension of motion independently, avoiding the need for complex interconnected links while achieving direction conversion through their coordinated action via the coupling members.
Solution Approach 2:
The invention introduces a second rocking member with a shaft disposed in a direction perpendicular to the first rocking shaft. This adds a dimensional aspect to the mechanism, allowing conversion of rocking directions by utilizing motion in perpendicular planes rather than requiring complex links in a single plane.
2Productivity
If multiple links are used to convert rocking operation into vertical behavior, then the operation transmission can be achieved, but the mechanism structure becomes complicated
Solution Approach 1:
The invention extracts the essential function of direction conversion from a complex multi-link mechanism and implements it through two simple rocking members connected by coupling members. By removing unnecessary intermediate links and focusing on the core rocking-to-vertical motion conversion, the mechanism achieves operation transmission with reduced structural complexity.
Solution Approach 2:
The invention changes the geometric parameters of the coupling members, specifically making the shaft-shaped portion of the second coupling member inclined with respect to the second rocking shaft. This parameter change allows the coupling member to convert rocking motion directly into vertical push-pull wire behavior without requiring additional links, thereby improving productivity while maintaining simple structure.
3Device complexity
If the shaft-shaped portion is inclined with respect to the second rocking shaft, then the rocking direction can be converted with simple configuration, but the coupling mechanism becomes more complex
Solution Approach 1:
The shaft-shaped portion of the second coupling member is deliberately designed to be inclined asymmetrically with respect to the second rocking shaft. This asymmetric inclination is essential for converting rocking directions while maintaining a simple overall configuration. The asymmetric geometry is straightforward to manufacture using standard machining processes, balancing configuration simplicity with ease of manufacture.
Data Source
AI summary
Provided is an operation mechanism capable of converting a direction of rocking with a simple configuration when an operation of an operation tool is transmitted. Included are: a first rocking member 32 rockable about a lower first rocking shaft 32b; a second rocking member 37 rockable about a lower second rocking shaft 38 disposed in a direction perpendicular to the lower first rocking shaft 32b; a rod end 36 fixed to the first rocking member 32; a coupling rod 39 fixed to the second rocking member 37 and including a shaft-shaped portion 39b disposed with an axial direction inclined with respect to the lower second rocking shaft 38, the shaft-shaped portion 39b being slidably coupled to the rod end 36; and a loader lever 20 coupled to one of the first rocking member 32 or the second rocking member 37.