Chainsaw Grip Motor Segmentation for Compact Oil Pump Drive
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Solution Overview
Problem
Existing chainsaws have a complex transmission assembly that occupies significant space, making them large and hindering miniaturization, as the oil pump and motor are connected through a complex structure to drive the cutting element and oil pump synchronously.
Innovation Solution
The chainsaw design integrates a second motor within the grip to independently drive the liquid pump, eliminating the need for a complex transmission assembly and allowing the liquid pump assembly to be housed inside the grip, thereby reducing the overall size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oil pump and motor are connected through a complex transmission assembly to drive the cutting element and oil pump synchronously, then the cutting element can be driven effectively, but the transmission assembly occupies significant space and increases the overall size of the chainsaw
Solution Approach 1:
The patent divides the drive system into two independent parts: a first motor dedicated to driving the cutting element, and a second motor dedicated to driving the oil pump. This segmentation eliminates the need for a complex transmission assembly that would otherwise be required to synchronize a single motor's drive to both components, thereby reducing the overall size while maintaining reliable operation of both the cutting element and oil pump.
2Stability of the object's composition
If a complex transmission assembly is used to connect the motor, cutting element, and oil pump, then synchronous operation is achieved, but the number of transmission pieces increases and occupies more space
Solution Approach 1:
The patent applies segmentation by separating the drive functions into two independent motor systems. The first motor drives the cutting element directly, and the second motor drives the oil pump directly. This eliminates the need for a complex transmission assembly with multiple pieces required to achieve synchronous operation, while still maintaining stable and coordinated operation of both components.
Solution Approach 2:
The patent uses two independent motors, where each motor is dedicated to a specific function (cutting element drive and oil pump drive). This multi-functionality approach allows each motor to be optimized for its specific task without requiring a complex transmission system to distribute power from a single motor to multiple functions, thereby reducing device complexity.
3Volume of moving object
If the liquid pump assembly is disposed within the grip, then space is saved and miniaturization is facilitated, but the liquid pump needs to be independently driven without relying on the motor's transmission assembly
Solution Approach 1:
The patent segments the drive system by introducing a second motor specifically for driving the oil pump, which is disposed within the grip. This independent drive system allows the liquid pump assembly to be compactly positioned within the grip without requiring connection to the first motor's transmission assembly, thereby achieving miniaturization while simplifying the motor connection structure.
Solution Approach 2:
The patent extracts the oil pump drive function from the first motor's transmission system and assigns it to a dedicated second motor. This extraction allows the liquid pump assembly to be independently positioned within the grip, saving space and facilitating miniaturization, while eliminating the complexity of connecting the liquid pump to the first motor through the transmission assembly.
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 design facilitates miniaturization and weight reduction by eliminating the need for a complex transmission structure, allowing for more efficient use of space and improved control over the liquid pump, enhancing the chainsaw's compactness and usability.
Implementation Method 1
the liquid pump provides pressure for the liquid to flow so that the liquid within the oil can is capable of being released or sucked in
Implementation Method 2
the first motor is drivingly connected to the squeezing piece and configured to drive the squeezing piece to rotate about a first straight line to squeeze the oil tube into deformation so that the lubricating oil within the oil can is transported to the output assembly through the oil tube
Implementation Method 3
a heat dissipation airflow entering the accommodation space from the air inlet and flowing out from the air outlet flows through the circuit board and the first motor
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A power tool includes an output assembly, a first motor, a housing, and a liquid pump assembly, where the output assembly implements an operation, the first motor is used for driving the output assembly to operate, the housing is formed with a grip for a user to hold, the liquid pump assembly includes a liquid pump and a second motor for driving the liquid pump to operate, the liquid pump assembly is at least partially disposed within the grip, and a total length of the power tool is greater than or equal to 20 cm and less than or equal to 150 cm.