Electric Work Machine Spindle Bearing Layout for Compact Radial Size
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Solution Overview
Problem
Existing electric work machines experience an increase in size due to the arrangement of components, which affects their operability and efficiency.
Innovation Solution
The electric work machine design incorporates a motor with a stator and a rotor located radially inward, a spindle positioned frontward from the stator, and a spindle bearing supporting the rear portion of the spindle, optimizing the layout to minimize size increase while maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spindle bearing is arranged radially outward from the stator, then the spindle can be supported in a rotatable manner, but the size of the electric work machine increases in the radial direction
Solution Approach 1:
The spindle bearing is repositioned from a radial arrangement (radially outward from the stator) to an axial arrangement (radially inward, overlapping with the stator in the axial direction). This dimensional change in component layout maintains the spindle support function while reducing the radial footprint of the machine.
Solution Approach 2:
The spindle bearing is nested within the radial space occupied by the stator, with the bearing positioned radially inward such that it overlaps with the stator in the axial direction. This nesting arrangement allows the bearing to be housed within the existing stator boundary, eliminating the need for additional radial space.
2Volume of stationary object
If components are arranged to minimize size, then the machine becomes more compact, but the complexity of component layout increases
Solution Approach 1:
By transitioning the bearing arrangement from radial to axial positioning, the patent simplifies the overall layout logic. The bearing is placed in the axial overlap region with the stator, creating a more intuitive and streamlined component arrangement that reduces layout complexity while achieving compactness.
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 configuration reduces the size increase in the electric work machine, enhancing its operability and efficiency by allowing for a more compact design without compromising performance.
Implementation Method 1
a motor including a stator, and a rotor at least partially located radially inward from the stator, the rotor being rotatable about a rotation axis
Data Source
AI summary
An electric work machine has less size increase. An electric work machine includes a motor including a stator and a rotor at least partially located radially inward from the stator and rotatable about a rotation axis, a spindle located frontward from the stator in a front-rear direction parallel to the rotation axis and rotatable under a rotational force generated by the rotor, and a spindle bearing supporting a rear portion of the spindle in a rotatable manner. The spindle bearing is located radially inward from the stator.