New energy source automobile spiral water cooling integral motor case and pressure casting process thereof

Abstract

The invention discloses a new energy source automobile spiral water cooling integral motor case and a pressure casting process thereof. The new energy source automobile spiral water cooling integral motor case comprises a motor casing, wherein the upper end of the motor casing is provided with a casing upper edge; the lower end of the motor casing is provided with a casing lower edge and a motor back end cover; a cooling water passage is arranged inside the motor casing; a water inlet installing seat is arranged in the lower part position of the motor casing; a water outlet installing seat is arranged in the upper part position of the motor casing; the water inlet installing seat and the water outlet installing seat are respectively communicated with the cooling water passage. The processing process of the new energy source automobile spiral water cooling integral motor case is optimized; the integral casting forming is realized; the processing cost of each split body and the assembling complexity are reduced; compactness and firmness are realized; the gravity pressure casting process is used; the new energy source automobile spiral water cooling integral motor case is suitable for mass production; the forming performance is good; the product surface is smooth; the crystal particles are fine; the tissue is compact; the mechanical performance is good; the technical requirements of customers can be met; meanwhile, the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of key parts of automobiles, in particular to a new energy automobile spiral water-cooled integrated motor casing and a die-casting process thereof. Background technique [0002] Due to the requirements of environmental protection and the support and development of the new energy vehicle field by the state, there is a large space for the development of new energy vehicle products, and the output has increased significantly this year, and the motor cooling of new energy vehicles is very important. [0003] At present, most of the motor housings of new energy vehicles are cooled by water cooling. Most of the motor housings of new energy vehicles sold on the market are split structures, and manual argon arc welding or manipulator argon arc welding is used between each part. Arc welding and welding connection, and the motor is mainly made of gray cast iron, and some motors are welded by combination of stainless steel and ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the motor housings of new energy vehicles are cooled by water cooling. Most of the motor housings of new energy vehicles sold on the market are split structures, and manual argon arc welding or manipulator argon arc welding is used between each part. Arc welding and welding connection, and the motor is mainly made of gray cast iron, and some motors are welded by combination of stainless steel and A3 steel (the casing is made of A3 plate, rolled into an inner and outer cylinder, and the inner cavity is welded with a stainless steel tube liner and The structure of the clapboard), the tensile strength of the cast iron casing is not enough, and it is prone to cracks and fractures. In order to ensure the strength, the thickness of the casing must be increased, and the motors made in this way are often bulky and heavy; and The method of welding the outer shell and adding the liner with the coiled plate uses two different materials, which makes welding more difficult, poor performance, complicated process, and there is a risk of the inner liner being welded off; in the process of welding each part, manual welding is used The efficiency is low, the cost is high, and the stability is uncontrollable (there are too many factors affecting the welding quality: the operator's mood, skills, welding methods, tooling tools, etc.), and the smoke generated during the welding process also has a great impact on the health of the operators ;Using manipulator welding requires very strict safety measures and a standardized working area. The investment is relatively large, and the processing accuracy of the previous process is very high, and the corresponding cost will be relatively high. Otherwise, there will be welding deviation, undercut, Defects such as air holes, welding defects cannot be found in time, and it is easy to lead to poor batches. Therefore, the disadvantages of split motor casings are obvious. The overall structure is not compact, and it is necessary to increase the process of installing various parts and the processing of each sub-component, resulting in high cost. And there is a risk of leaking and insufficient structural strength

[0004] The layout of the cooling water channel of some motors is too short to completely cover the part of the motor that needs heat dissipation, and the design of the water inlet and outlet of the water channel is unreasonable (the water inlet is on the top and the water outlet is on the bottom), resulting in the cooling water in the water channel. Fully filled, thus affecting the cooling effect

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