Heat Circulation Pump Terminal Box Radial Projection
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Solution Overview
Problem
Current heating circulation pumps face challenges in manufacturing and assembly costs, with a need for improved reliability and design efficiency, particularly in the integration of electrical and electronic components within the terminal box.
Innovation Solution
The terminal box is designed to project radially beyond the motor housing with a rectangular outer contour and recessed corners, featuring snap connections for tool-free assembly and integral tongue-like projections for secure fastening and electrical connections, ensuring accessibility and reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal box is designed to project radially beyond the motor housing with a rectangular outer contour, then the accessibility of screw heads for tool engagement is improved, but the device complexity increases
Solution Approach 1:
The terminal box is designed with different geometries in different regions: a rectangular outer contour with recessed corners in the radially projecting region to enable tool accessibility, and a cylindrical shape in the region connecting to the motor housing. This local differentiation resolves the contradiction by providing accessibility where needed while maintaining simplicity where not required.
Solution Approach 2:
The terminal box transitions from a two-dimensional radial projection to a three-dimensional structure with recessed corners, creating axial clearance space that allows tool engagement. This dimensional approach enables screw access without interfering with the motor housing flange.
2Ease of manufacture
If snap connections are used for fastening the terminal box to the motor housing, then the ease of assembly is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The snap connections are designed to engage automatically when the terminal box is positioned on the motor housing flange, eliminating the need for additional fastening operations. The tongues with snap connections protruding from the terminal box sides self-align and secure the assembly, making the process tool-free and simple while accommodating reasonable manufacturing tolerances.
Data Source
AI summary
A heat circulation pump includes a pump housing (1) with a pump impeller arranged therein which is arranged in a motor housing (8) which is axially flange-mounted on the pump housing (1). The heat circulation pump also includes a terminal box (12) which is axially connected to the motor housing (8) in order to house electric and/or electronic components of the engine control and for electrically connecting the motor. The terminal box (12) protrudes, radially at least in sections, from the terminal box side end of the motor housing (8) and the terminal box has, in the axial direction, a right-angled outer contour with recesses (20) in the corner areas which are arranged in the axial extension of the screws (11). The flange (10) of the motor housing (8) are fixed to the pump housing (1) by the screws.