Haymaking Machine Rotor Connecting Device
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Solution Overview
Problem
Existing rotors for haymaking machines face issues with assembly play and torque requirements, leading to premature wear and safety concerns due to inadequate tightening of oscillating arm parts, which complicates maintenance and operation.
Innovation Solution
The connecting device includes an insert with internal threads and a threaded element that screws into the insert, allowing for easy assembly with minimal deformation of parts, ensuring secure engagement without excessive force, thus eliminating assembly clearances and enhancing safety and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bolt is tightened to a high torque to eliminate assembly play, then the mounting clearance between portions is reduced, but the engaging and engaged portions are strongly deformed making subsequent dismantling difficult or impossible
Solution Approach 1:
The insert acts as an intermediary component between the bolt and the oscillating arm parts. It distributes the clamping force over a larger area through its shoulder, preventing localized deformation of the engaging and engaged portions while still eliminating assembly play. This mediator allows high torque application without damaging the parts that need to be dismantled later.
2Ease of repair
If the bolt is tightened to a low torque to avoid deformation, then the engaging portion can be easily dismantled, but the bolt may loosen unexpectedly during operation
Solution Approach 1:
The insert with its shoulder provides a larger surface area for force distribution. This intermediary structure allows the bolt to be tightened to a torque that is sufficient to prevent loosening during operation while distributing the stress to avoid deformation of the oscillating arm parts, maintaining both security and ease of dismantling.
3Ease of operation
If a standard conventional spanner is used for tightening, then the tool is easily accessible, but the required torque cannot be applied with good precision
Solution Approach 1:
The insert structure with its shoulder and internal thread configuration creates a self-centering and self-aligning mechanism. This allows the bolt to be tightened accurately without requiring precision torque tools, as the insert geometry itself guides the bolt into proper alignment and distributes force evenly, enabling standard tools to achieve precise results.
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
This solution facilitates easy assembly and secure engagement of oscillating arm parts, ensuring the rotor's durability and safety by eliminating operating clearances and reducing mechanical stresses during operation, making maintenance easier and safer.
Implementation Method 1
The threaded element is screwed into said internal thread and the shoulder of said threaded element rests on the engaged portion so as to tighten the engaged portion against the engaging portion along the geometric axis
Implementation Method 2
The connecting device comprises an insert with at least one internal thread and a threaded element having a geometric axis and provided with a shoulder
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a rotor (11, 12) comprising a rotating housing (18) and at least one swing arm (19), said swing arm (19) comprising at least one internal part (20) connected to the housing (18) and an external part (21) carrying tools (13), one of the parts (20, 21) comprising an engaging portion (24) capable of partially engaging in an engaged portion (25) of the other part (20, 21), said portions (24, 25) each comprising at least one hole (28, 29, 30, 31) and capable of being assembled by means of a connecting device (32) comprising at least one threaded element (33, 34) with a shoulder (36, 37), said threaded element (33, 34) passing through each hole (28, 29, 30, 31) of said portions (24, 25).According to the invention, the linking device (32) comprises an insert (38) with at least one thread (39, 40) insertable inside the engaging portion (24), the threaded element (33, 34) is screwed into the thread (39, 40) and the shoulder (36, 37) rests on the engaged portion (25) to clamp the engaged portion (25) against the engaging portion (24).