Excavator Bucket Front Fixing Device With Segmented Projections
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Solution Overview
Problem
The existing methods for replacing worn-out front pieces in excavating buckets are labor-intensive and expensive due to the need for welding, and the current locking bolt systems are inefficient in managing shear stresses and wear.
Innovation Solution
The excavating bucket features a bucket front fixing device with locking bolts that extend through projections and recesses in the side portions and bucket front, allowing for easy connection and disconnection, and includes a locking piece to prevent bolt movement, thereby absorbing shear stresses and simplifying the replacement process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bucket front is welded to the side portions, then the connection strength is improved, but the ease of repair deteriorates due to labor-intensive removal and preparation
Solution Approach 1:
The side portions are segmented into multiple projections (at least two) that distribute the connection points, allowing the bucket front to be divided into separable components that can be independently removed and replaced without affecting the entire structure
Solution Approach 2:
The fixing device transitions from a static welded connection to a dynamic bolted connection that can be easily assembled and disassembled. The locking bolts can be quickly removed to detach the bucket front, enabling rapid replacement without the labor-intensive processes required by welding
2Device complexity
If only two sharing surfaces are used for locking, then the device complexity is reduced, but the reliability deteriorates due to poor load distribution
Solution Approach 1:
The coupling piece is divided into multiple projections (at least two), creating multiple separate locking surfaces. This segmentation distributes the shear stresses across multiple contact points rather than concentrating them on two surfaces, improving load distribution and overall reliability
Solution Approach 2:
The solution moves from a two-dimensional locking arrangement to a three-dimensional multi-point distribution system. The projections are arranged in space to provide optimal load distribution, utilizing spatial dimensioning to enhance the reliability of the connection
3Strength
If the locking bolt extends through multiple projections, then the strength of the fixing device is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The coupling piece is segmented into multiple projections with openings that are positioned to align with corresponding openings in the bucket front. This segmentation allows the locking bolt to engage multiple points simultaneously, distributing stresses while the modular design facilitates manufacturing by breaking down the precision requirements into manageable alignment tasks for each projection pair
Data Source
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AI summary
A fixing device (54) for a bucket front (14), wherein the bucket front (14) forms a wear part in an excavating bucket (1) comprising at least one side portion (6), and wherein the side portion (6) is formed with a coupling piece (8) comprising at least two projections (10) with recesses (12), wherein the projections (10) fit in a complementary manner into recesses (12) in the bucket front (14) or in a coupling part (40) fixed to the bucket front (14), and wherein the bucket front (14) is connected to the coupling piece (8) by means of a locking bolt (16) extending, in the direction of the side portion (6), through openings (18) associated with the side portion (6) and the bucket front (14).