Motor Spindle Protection via Peripheral Wall Coolant Extraction
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Solution Overview
Problem
Conventional spindle protection structures with rotary joint supporting structures require complex designs and multiple cutouts, leading to high manufacturing costs due to the need for coolant discharge functionality.
Innovation Solution
A motor design featuring a hollow rotary shaft with a flinger and a peripheral wall having cutouts that project axially to form protrusions and an annular top plate, allowing for coolant discharge without the need for cutouts in the rotary joint housing, simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cutouts are formed in the rotary joint housing to discharge coolant, then coolant discharge functionality is achieved, but the structure becomes complicated and manufacturing costs increase
Solution Approach 1:
The invention extracts the coolant discharge function from the rotary joint housing and relocates it to the motor housing. The peripheral wall with cutouts in the motor housing serves as the coolant discharge path, while the rotary joint housing maintains its structural integrity without requiring cutouts. This separation of functions resolves the contradiction between achieving coolant discharge and maintaining structural simplicity.
Solution Approach 2:
The flinger acts as an intermediary element that redirects coolant toward the peripheral wall's cutouts. By positioning the flinger to scatter coolant against the peripheral wall, the system enables coolant discharge through the motor housing structure without modifying the rotary joint housing, thus maintaining structural simplicity while achieving the discharge function.
2Reliability
If cutouts are formed in the rotary joint housing, then coolant can be discharged, but manufacturing costs increase due to structural complexity
Solution Approach 1:
The coolant discharge function is extracted from the rotary joint housing and assigned to the motor housing's peripheral wall. This eliminates the need for complex cutouts in the rotary joint housing, simplifying its manufacturing process and reducing costs while maintaining effective coolant discharge capability through the motor housing structure.
Solution Approach 2:
The peripheral wall of the motor housing serves multiple functions: it provides structural support for the motor assembly and simultaneously acts as the coolant discharge path through its cutouts. This multi-functionality eliminates the need for separate coolant discharge structures in the rotary joint housing, reducing overall manufacturing complexity and cost.
3Ease of manufacture
If the rotary joint housing structure is simplified by removing cutouts, then manufacturing costs decrease, but coolant discharge capability may be compromised
Solution Approach 1:
The flinger serves as an intermediary that actively directs coolant flow toward the peripheral wall's cutouts. This mediation ensures that coolant is effectively channeled to the discharge path without requiring modifications to the rotary joint housing, thereby maintaining both manufacturing simplicity and coolant discharge reliability.
Solution Approach 2:
The motor housing's peripheral wall with cutouts serves as a self-contained coolant discharge system. The structure utilizes the motor housing itself to provide the discharge path, eliminating the need for additional features in the rotary joint housing. This self-service approach maintains manufacturing simplicity while ensuring reliable coolant discharge functionality.
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 reduces manufacturing costs by eliminating the need for cutouts in the rotary joint housing, simplifying its structure while maintaining effective coolant discharge functionality.
Implementation Method 1
a flinger integrally attached to a rotor shaft of a motor
Implementation Method 2
a peripheral wall that is provided in the motor housing and projects in an axial direction of the rotary shaft so as to surround a periphery of the flinger, wherein the peripheral wall is configured to have a plurality of cutouts formed in a side surface thereof so as to establish communication between the interior and exterior of the peripheral wall
Data Source
AI summary
A motor, to which a rotary joint supporting structure is attached, turns a spindle. The motor includes a motor housing, a rotary shaft that is hollow, the flinger that is integrally attached to the rotary shaft outside the motor housing, and a peripheral wall that is provided in the motor housing and projects in the axial direction of a spindle so as to surround the periphery of the flinger. The peripheral wall has cutouts in its side surface so as to establish communication between the interior and exterior of the peripheral wall, to thereby form protrusions projecting in the axial direction of the rotary shaft and an annular top plate portion provided on the distal end of the protrusions.