External rotor motor for driving automobile cooling fan

Abstract

The invention discloses an external rotor motor for driving an automobile cooling fan, which comprises a controller assembly, a conductive support, a PCBA board, an armature assembly and an external rotor assembly, wherein the conductive support comprises three mounting hole parts, the peripheries of the mounting hole parts are provided with terminal protection parts, and the terminal protection parts are connected with the mounting hole parts through connecting rods; the back of the connecting rod is provided with a positioning caulking groove, each mounting hole part is provided with a conductive connecting rod, the middle part of each conductive connecting rod is embedded in the positioning caulking groove, the tail end of each conductive connecting rod is a connecting terminal and is located in the corresponding terminal protection part, and the connecting terminals are inserted into the corresponding conductive holes in the PCBA board to be welded and fixed. The armature assembly is electrically connected with the PCBA board through the conductive connecting rod. The external rotor motor can effectively protect fallen soldering tin when the conductive connecting rod is welded, and avoids short circuit of the motor.

Description

technical field [0001] The invention relates to an outer rotor motor, in particular to an outer rotor motor for driving an automobile cooling fan. Background technique [0002] The current external rotor motor for driving the cooling fan of automobiles includes a controller assembly, the controller assembly includes a shell made of a heat sink and a rear end cover, and a conductive support and a PCBA board are arranged in the shell, and the heat sink A central shaft is provided on the front, an armature assembly is installed on the front of the heat sink, and an outer rotor assembly is mounted on the central shaft in rotation. The heat sink is provided with an inductor installation area, a conductive bracket installation area, a harness joint area and The heat conduction platform, the conductive support is placed in the conductive support installation area, the inductance is provided in the inductance installation area, and the wire harness conductive pin is provided in the ...

AI Technical Summary

Problems solved by technology

When welding the conductive connecting rod and the PCBA board, the solder may fall along the conductive connecting rod, and the dropped tin is not protected or collected, which may cause the pins on the PCBA to touch the dropped solder by mistake, resulting in PCBA board short circuit

[0003] In addition, the armature assembly connects the wiring harness winding and the PCBA board of the controller assembly through the conductive connecting rod on the conductive bracket, and the insulating end cover of the armature assembly is embedded with a metal guard hook, which has a convenient conductive The connecting rod hook connected by the connecting rod and a wire harness hook that is convenient for the wire harness to pass through. However, when the output power of the brushless motor increases, for example, to 600W, the armature winding wire harness will be more, bypassing the wire harness hook The number of roots is relatively large, and the current harness hook obviously does not satisfy the winding of the harness. At the same time, the insulation of the outer layer of the harness will be damaged during clamping and welding, so that the harness and the metal hook are welded together. However, due to the large number of wire harnesses wound on the hook of the wire harness, there will be crossing between the wire harnesses, so that the outer layer of insulation of the wire harness that may be wrapped inside the hook of the wire harness during clamp welding is not damaged, resulting in failure to communicate with other wire harnesses. The wiring harness is electrically connected, so that the wiring of the armature assembly will be wrong and will not work properly

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