Heat Dissipation Part in Hammer-Drill Housing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hand-held power tools, such as percussion drills, face challenges in effectively dissipating heat generated by the frictional contact between the locking mechanism and the housing, particularly when the housing is made of plastic, which can lead to excessive heating and reduced service life.
Innovation Solution
Incorporating a heat dissipation part with a large surface area and high thermal conductivity, separate from the housing, that is in contact with the locking mechanism receiving part to facilitate heat transfer and dissipation through thermal radiation and convection, while also providing axial support and fixing the locking mechanism in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the housing is made of plastic to reduce weight and cost, then manufacturing cost and weight are reduced, but heat dissipation capability deteriorates leading to excessive heating
Solution Approach 1:
The housing is segmented into a plastic housing and a separate heat dissipation part made of metal. The heat dissipation part is inserted into the plastic housing to create a composite structure that combines the advantages of both materials: the plastic provides lightweight and cost-effective construction while the metal insert provides effective heat dissipation.
Solution Approach 2:
The invention uses a composite structure combining plastic and metal materials. The heat dissipation part is made of metal (such as aluminum or aluminum alloy) and is integrated into the plastic housing, creating a hybrid structure that leverages the thermal conductivity of metal and the lightweight, cost-effective properties of plastic.
2Temperature
If a heat dissipation part is added as a separate component, then heat dissipation capability is improved, but device complexity increases
Solution Approach 1:
The heat dissipation part is merged with the housing structure by being inserted into a corresponding recess in the plastic housing. This integration approach combines the heat dissipation function with the existing housing, avoiding the need for completely separate heat dissipation components and reducing overall device complexity.
Solution Approach 2:
The heat dissipation part serves multiple functions: it acts as a heat dissipation component, provides structural support for the locking mechanism receiving part, and integrates with the housing structure. This multi-functionality reduces the need for additional separate components.
3Temperature
If the locking mechanism is equipped with a support component made of light metal, then heat dissipation is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The support component is segmented into two distinct parts: a plastic housing and a metal heat dissipation insert. This segmentation allows each part to be manufactured separately using appropriate processes and then assembled, simplifying manufacturing compared to creating a complex metal support component structure.
Solution Approach 2:
The support component uses a composite structure where a metal heat dissipation insert is placed within a plastic housing. This composite approach provides effective heat dissipation while keeping the overall structure simple and manufacturing costs reasonable, avoiding the need for complex metal support components.
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
This solution effectively reduces thermal stress on plastic components, extends their service life, and allows for a compact drive train design with efficient heat dissipation, ensuring reliable operation and reduced thermal load on transmission parts.
Implementation Method 1
heat is first transferred to the heat dissipation part by thermal conduction
Implementation Method 2
The release of heat from the heat dissipation part to the environment takes place mainly through thermal radiation
Implementation Method 3
The release of heat from the heat dissipation part to the environment takes place mainly through thermal radiation or through convection
Data Source
Figure 1
Figure 2
AI summary
A handheld power tool (1) has a drive motor (1) for driving a tool holder (7), in which a tool can be received. Also provided is a notched mechanism (11) for producing a percussive function, comprising a notched mechanism receiving part (12) and a notched disc (13). The notched mechanism receiving part (12) is in contact with a heat dissipating part (15) arranged in the housing.