Timber-Working Head Adaptor Plate Radial Projections
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Solution Overview
Problem
The assembly and maintenance of frame-mounted drives in timber-working heads are complex and require frequent greasing, necessitating technicians to enter a caution zone and disassemble components, which is time-consuming and inefficient.
Innovation Solution
A timber-working head design featuring a frame-mounted drive with an adaptor plate and radial projections that simplify assembly and eliminate the need for periodic greasing, using two hydraulic motors and a feed wheel with an operational interface that reduces axial clearances and eliminates the need for shims, allowing for a more compact and efficient assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a splined center hub is used to connect motor shafts to the feed wheel, then torque transmission is improved, but assembly complexity increases and periodic greasing is required
Solution Approach 1:
The center hub is divided into an upper hub portion and a lower hub portion that can be separately assembled. The radial projections are segmented and received in corresponding recesses, allowing the assembly to be completed in fewer steps without requiring disassembly for maintenance.
Solution Approach 2:
The splined connection is extracted and replaced with a radial projection-recess interface. This eliminates the need for periodic greasing of splines while maintaining torque transmission capability, and simplifies the assembly process by removing complex greasing steps.
2Reliability
If shims are used to eliminate axial float and apply compression on seals, then sealing reliability is improved, but assembly time and complexity increase
Solution Approach 1:
The adaptor plate is pre-configured with radial projections that automatically provide the necessary axial positioning and seal compression upon assembly. This preliminary design eliminates the need for separate shim installation steps to achieve proper sealing.
Solution Approach 2:
Shims are extracted from the assembly process entirely. The radial projection-recess interface inherently provides axial float elimination and seal compression without requiring additional shim components or complex measurement procedures.
3Stability of the object's composition
If a frame-mounted drive with center hub is used, then synchronized rotation of feed wheels is achieved, but maintenance requires entering caution zone and disassembly
Solution Approach 1:
The drive system is segmented into modular components (upper hub portion, lower hub portion, adaptor plate) that can be independently accessed and maintained. The radial projection interface allows maintenance without requiring complete disassembly of the center hub assembly.
Solution Approach 2:
The maintenance-intensive splined connection is extracted and replaced with the radial projection-recess interface. This eliminates periodic greasing requirements entirely, and the simplified structure allows maintenance to be performed more easily without entering the caution zone.
4Ease of manufacture
If radial projections are used in the adaptor plate, then assembly is simplified and greasing is eliminated, but manufacturing precision requirements increase
Solution Approach 1:
The radial projections and recesses are designed with specific local geometric features that concentrate the precision requirements at critical mating surfaces. This allows the rest of the components to be manufactured with standard tolerances while maintaining overall assembly precision.
Data Source
AI summary
A timber-working head comprises a first motor, a second motor, a feed wheel, and an adaptor plate. The first motor comprises a first rotary output element. The second motor comprises a second rotary output element. The feed wheel is fixed to the first rotary output element for rotation therewith. The adaptor plate fixed to the second rotary output element for rotation therewith. The adaptor plate comprises radial projections arranged about the periphery of the adaptor plate and received respectively within corresponding axially recessed portions of the feed wheel so as to provide an operational interface between the adaptor plate and the feed wheel.