Dual Battery Receptacle Layout for Compact Motor Units
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Solution Overview
Problem
Existing motor units face challenges in using versatile and compact batteries, leading to increased size and inefficiency in space utilization, particularly between the control unit and the body housing.
Innovation Solution
The motor unit is designed with a configuration that includes two battery receptacles on the same wall, allowing for the use of compact batteries that slide along the wall, and optimizing the placement of components to minimize size and maximize space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a dedicated large battery is used, then the motor unit can provide sufficient power, but the size of the motor unit increases and versatility decreases
Solution Approach 1:
The battery system is divided into multiple separate battery receptacles (first battery receptacle, second battery receptacle, etc.) that can be independently attached and detached. Each receptacle holds a smaller battery module, allowing the total power to be achieved through combination while maintaining compact individual units. This segmentation enables users to attach only the necessary number of battery receptacles based on power requirements.
Solution Approach 2:
The battery configuration is made dynamic and adjustable through multiple attachable battery receptacles that can be combined in different numbers and arrangements. The system allows flexible power scaling where users can attach one or multiple battery receptacles depending on the power demand of the working unit, transforming the static battery size into a dynamically adjustable configuration.
2Temperature
If the first fan is located between the first bearing and the second bearing, then cooling is provided, but the distance between bearings must be longer, increasing the motor unit size
Solution Approach 1:
The fan is repositioned from the axial direction (between bearings along the motor shaft axis) to a radial or alternative spatial arrangement. The fan is configured to extend in a direction different from the motor shaft axis, allowing cooling air intake and exhaust paths to be established in alternative dimensions, thereby avoiding the need to increase the axial length between bearings.
3Temperature
If the first fan is located in the accommodating space inside the motor housing, then cooling is achieved, but the motor housing becomes larger
Solution Approach 1:
The fan is extracted from the internal accommodating space of the motor housing and repositioned in an external or alternative location. The fan is configured to extend outside the motor housing or in a space that does not increase the motor housing volume, separating the cooling component from the motor housing interior to maintain compact housing dimensions.
4Device complexity
If space between the control unit and the body housing wall is not utilized, then component placement is simple, but the motor unit size increases
Solution Approach 1:
The battery receptacles are integrated into the space between the control unit and the body housing wall. The first battery receptacle and second battery receptacle are arranged to utilize the available gap space, merging the battery mounting function with the existing structural space, thereby reducing the overall motor unit size without requiring additional complex component placement arrangements.
Data Source
AI summary
A motor unit may include: a body housing including an accommodating part including a first wall, a first battery receptacle and a second battery receptacle that are disposed on the first wall; and a motor disposed inside the accommodating part and configured to drive a working unit. The first receptacle may be configured to have a first battery attached thereto, the first battery being configured to slide along the first wall. The second receptacle may be configured to have a second battery attached thereto, the second battery being configured to slide along the first wall. The first battery may include a first side surface. The second battery may include a second side surface which may face the first side surface and be disposed parallel to the first side surface when the first battery is attached to the first receptacle and the second battery is attached to the second receptacle.