Rigid Clearing Blade for Excavator Chisel Arrangement
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Solution Overview
Problem
Existing chisel arrangements with displaceable or rotatable clearing scrapers require complex and vulnerable mechanisms for changing the scraper position, complicating the assembly and operation.
Innovation Solution
A chisel arrangement with a rigidly attached clearing blade projecting from the housing, parallel to the pivot axis, allowing the blade to remain in position during chiselling and tilt for material removal without obstructing the chisel, featuring a replaceable front piece and reinforcing ribs for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a displaceable or rotatable clearing scraper is used, then material clearance capability is improved, but device complexity and structural vulnerability increase
Solution Approach 1:
The clearing blade is designed to be dynamically positionable relative to the chisel housing through hydraulic actuation. The blade can be tilted from a retracted position during chiselling to an extended position for material clearance, and vice versa. This dynamic positioning allows the system to adapt its configuration based on operational needs without requiring complex disassembly or reassembly mechanisms.
Solution Approach 2:
The clearing blade serves multiple functions: it acts as a structural reinforcement element attached to the housing, provides material clearance when extended, and maintains a compact profile during chiselling operations. By integrating these functions into a single component that can change its effective position, the invention eliminates the need for separate mechanisms to handle material removal.
2Ease of operation
If a displaceable or rotatable clearing scraper is used, then material clearance capability is improved, but reliability decreases due to vulnerable mechanisms
Solution Approach 1:
The clearing blade is designed to be dynamically positionable relative to the chisel housing through hydraulic actuation. The blade can be tilted from a retracted position during chiselling to an extended position for material clearance, and vice versa. This dynamic positioning allows the system to adapt its configuration based on operational needs without requiring complex disassembly or reassembly mechanisms.
Solution Approach 2:
The clearing blade is designed with sufficient structural strength and rigidity to withstand the forces encountered during material clearance operations. By pre-reinforcing the blade structure and its attachment points to the housing, the design anticipates and withstands the mechanical stresses of pushing away crushed material, preventing failure before it occurs.
3Productivity
If the clearing blade projects from the housing periphery parallel to the pivot axis, then material clearance efficiency is improved, but the blade may obstruct the chisel during normal positioning
Solution Approach 1:
The clearing blade is designed to be dynamically positionable relative to the chisel housing through hydraulic actuation. The blade can be tilted from a retracted position during chiselling to an extended position for material clearance, and vice versa. This dynamic positioning allows the system to adapt its configuration based on operational needs without requiring complex disassembly or reassembly mechanisms.
Solution Approach 2:
The clearing blade operates in periodic cycles: it is retracted to a non-obstructive position during chiselling operations and extended to an active clearance position when material needs to be removed. This periodic switching between retracted and extended states ensures that the blade assists material removal when needed while preventing interference with the chisel during breaking operations.
Data Source
Figure 1~2
Figure 3~4
AI summary
A chisel arrangement (1) arranged to be connected to a pivotal tool mount (31) on a work machine (3) is described, wherein a pivot axis (32) of the tool mount (31) forms an operative pivot axis (15) of the chisel arrangement (1), and wherein the chisel arrangement (1) includes a housing (11) provided with a coupling portion (14) which is arranged to be attachable to the tool mount (31), a reciprocatable chisel (12) projecting from an end portion (112) of the housing (11), and wherein a clearing blade (2) is rigidly attached to the housing (11) remotely from said end portion (112) and projects from the periphery of the housing (11) and is provided with a forward edge (211) which is substantially parallel to the operative pivot axis (15) of the chisel arrangement (1).