Pin Connection Device Assembly Simplification
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Solution Overview
Problem
The existing pin connection devices face challenges in assembling and cost reduction due to complex processes such as press fitting, welding, and machine work required for attaching pin guide members, which degrade assembly properties and increase costs in mass-produced machines, especially in narrow clearance applications.
Innovation Solution
The solution involves first and second connection portions with pin holes, pin guide members that perform stroke operations, and a connection member for detachable integration of inner ends, along with supporting means for outer ends, simplifying the assembly by omitting press fitting and welding, and using convexo-concave fitting for support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pin guide members are attached using conventional methods (press fitting, welding, machine work), then reliable connection is achieved, but assembly complexity increases and manufacturing cost rises
Solution Approach 1:
The pin guide member is divided into two separate parts: an inner end portion and an outer end portion. The inner end portion is integrated with the connection member, while the outer end portion is attached to the connection portion. This segmentation eliminates the need for complex press fitting and welding operations, as each part can be independently manufactured and assembled through simpler attachment means.
Solution Approach 2:
The inner end portion of the pin guide member is merged with the connection member to form an integrated structure. This merging eliminates the need for separate attachment processes for the inner end, reducing assembly complexity and manufacturing cost while maintaining reliable connection through the unified structure.
2Strength
If pin guide members are attached using press fitting and welding, then structural integrity is ensured, but manufacturing time and cost increase
Solution Approach 1:
By segmenting the pin guide member into inner and outer end portions with different attachment methods, the structure maintains integrity where needed (inner end integrated) while enabling faster assembly where possible (outer end with simplified attachment), thus improving productivity without sacrificing strength.
Solution Approach 2:
Different parts of the pin guide member are treated differently: the inner end portion is integrated for maximum strength, while the outer end portion uses simplified attachment. This local differentiation optimizes both structural integrity and assembly speed by applying the appropriate attachment method to each specific location.
3Reliability
If conventional attachment methods are used for pin guide members, then secure fixation is achieved, but production cost increases
Solution Approach 1:
Segmenting the pin guide member allows each portion to be manufactured independently using optimized processes for that specific part, reducing overall manufacturing cost while maintaining secure fixation through the integrated inner end portion.
Solution Approach 2:
Merging the inner end portion of the pin guide member with the connection member creates a unified structure that eliminates the need for expensive press fitting and welding operations, thereby reducing manufacturing cost while maintaining secure fixation.
Data Source
AI summary
Assembly of a pin guide member for retaining a pair of connecting pins is facilitated for improvement in an assembling property and cost reduction. On the premise that inner brackets are overlapped with outer brackets, and pins are inserted into pin holes thereof so as to connect the brackets to each other, inner collar portions of pin guide members for retaining the pins are combined and integrated with each other by bolts and nuts through a supporting plate serving as a connection member. Meanwhile, outer collar portions of both the pin guide members are supported in the pin radial direction with respect to the inner brackets and rotation thereof is prevented.