Sliding Air Conduit for Reciprocating Power Tool Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power tools with motor cooling systems experience excessive wear and potential failure due to the elastic sections stretching and compressing with each reciprocating movement, leading to overheating and catastrophic failure without user awareness.
Innovation Solution
A power tool design featuring a fixed first end and a moveable second end air conduit for the motor fan assembly, with the second end slidably engaging the housing and optionally forming a seal, using flexible materials like rubber or silicone, to guide cooling airflow effectively while accommodating reciprocating movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an elastic section is used to connect air intake openings to the motor, then the air conduit can accommodate reciprocating movement, but the elastic section experiences excessive wear and may fail
Solution Approach 1:
The air conduit is divided into two distinct ends: a first end that is fixed to the motor fan assembly and a second end that is moveable and slidably engageable with the housing. This segmentation allows each end to perform its specific function - the fixed end provides stable anchoring while the moveable end accommodates reciprocating movement through sliding action, eliminating the wear problems associated with elastic sections.
Solution Approach 2:
The second end of the air conduit is designed to be moveable rather than fixed, allowing it to slide along the inner surface of the housing during reciprocating movement. This dynamic design enables the air conduit to adapt to the changing positions of the motor fan assembly while maintaining a reliable connection without experiencing excessive wear.
2Stability of the object's composition
If the air conduit is fixed rigidly, then structural stability is improved, but it cannot accommodate reciprocating movement of the hammer
Solution Approach 1:
The air conduit is segmented into a fixed first end and a moveable second end. The first end maintains structural stability by being fixed to the motor fan assembly, while the second end provides adaptability through slidable engagement with the housing, allowing the conduit to accommodate reciprocating movement without compromising overall structural integrity.
Solution Approach 2:
The moveable second end of the air conduit acts as an intermediary between the fixed structural framework and the reciprocating hammer mechanism. It mediates the conflicting requirements of structural stability and movement accommodation by providing a controlled sliding interface that maintains connection while allowing necessary displacement.
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
The solution provides durable and efficient motor cooling by minimizing wear on the air conduit, maintaining airflow integrity, and preventing overheating, thus ensuring the motor operates optimally and reducing the risk of tool failure.
Implementation Method 1
the at least one air conduit is flexible. Optionally, the at least one air conduit comprises bellows. Optionally, the at least one air conduit is a rubber, rubber-like materials, thermoplastic elastomers (TPE), or silicone material.
Implementation Method 2
the at least one air conduit is configured to slidably engage with an inner surface of the housing in a direction parallel with the longitudinal axis. Optionally, the at least one air conduit is configured to have a pressure differential with respect to atmospheric pressure when the motor fan assembly is actuated.
Implementation Method 3
the second end of the at least one air conduit comprises a lip configured to wipe the inner surface of the housing.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A power tool (100) comprises a housing and an inner mechanism mounted at least partially within the housing (102). The inner mechanism (200) is configured to be reciprocally moveable with respect to the housing and the inner mechanism has a motor fan assembly (216). The power tool comprises an air inlet (802) and an air outlet (804) positioned in the housing and a cooling airflow path extending between the air inlet and the air outlet via the motor fan assembly. The power tool also comprises at least one air conduit located on the airflow path configured to guide the cooling airflow from the air inlet to the motor fan assembly wherein a first end of the air conduit is fixed and a second end of the at least one air conduit is a free end.