Motor Busbar Terminal Layout for Reduced Radial Thickness
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Solution Overview
Problem
The existing design of motors results in increased thickness of applications due to the distance between the shaft and the terminal part, necessitating a reduction in this distance to minimize overall thickness.
Innovation Solution
The motor design includes a busbar with a terminal part having a terminal body with legs that extend from the body, where the first end portion is positioned between the rotor and the housing in a radial direction, and the second end portion is disposed between the lower surface of the body and the housing, with the busbar body and terminal body partially overlapping in the axial direction, allowing for a reduced radial distance and fusing space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal of the terminal part is disposed outside the busbar in the radial direction to secure fusing space, then the fusing space is sufficient, but the thickness of the application increases
Solution Approach 1:
The patent transitions the terminal arrangement from a radial disposition (outside the busbar) to an axial disposition (overlapping with the busbar body). By changing the dimension in which the terminal is positioned from radial to axial, the design achieves sufficient fusing space while reducing the radial thickness of the application.
Solution Approach 2:
The terminal body is nested within the axial space occupied by the busbar body. The terminal body overlaps with the busbar body in the axial direction, allowing the terminal to be positioned within the existing radial envelope of the motor, thereby reducing overall radial thickness while maintaining adequate fusing space.
2Length of moving object
If the distance between the shaft and terminal part is reduced to minimize thickness, then the application thickness is reduced, but the fusing space may be compromised
Solution Approach 1:
The patent resolves this contradiction by changing the dimension in which fusing space is provided from radial to axial. The terminal body overlaps with the busbar body axially, creating fusing space in the axial direction rather than requiring radial space, thus reducing the distance from the shaft to the terminal while maintaining adequate fusing volume.
Solution Approach 2:
The patent changes the spatial parameters of the terminal arrangement by positioning the terminal body to overlap with the busbar body in the axial direction. This parameter change allows the radial distance to be minimized while the axial overlap provides the necessary fusing space through a different spatial configuration.
Data Source
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AI summary
The present invention may provide a motor including a housing, a stator disposed in the housing, a rotor disposed in the stator, a shaft coupled to the rotor, a busbar disposed above the stator, and a terminal part connected to the busbar, wherein the busbar includes a busbar body and a first terminal disposed at the busbar body, the terminal part includes a terminal body and a second terminal disposed at the terminal body and connected to the first terminal, the terminal body includes a body disposed to be spaced apart from an upper end of the housing and legs which extend from the body and are in contact with the housing, a width of each of the legs in a circumferential direction is smaller than a width of the body in the circumferential direction, the second terminal includes a first end portion exposed upward from the body and a second end portion exposed downward from the body and connected to the first terminal, the first end portion is disposed between the rotor and an inner circumferential surface of the housing in a radial direction, and the second end portion is disposed between a lower surface of the body and the upper end of the housing in an axial direction.