Motor rotor structure

Abstract

The invention relates to a motor rotor structure, which is characterized by comprising a shaft core in shape of a cylindrical long rod body, and a plurality of magnet buckle slabs in shape of thin round plate bodies of which the centers are provided with central holes for the shaft core to pass through and the periphery is provided with at least more than two buckling grooves, wherein buckling grooves run through the circumference of the magnet buckle slabs and are of a shape similar to dovetail grooves with big inside parts and small outside parts. The motor rotor also comprises at least more than two magnets which are corresponding to the shapes of the buckling grooves of the magnet buckle slabs and are embedded in the buckling grooves. Thus, the motor rotor structure not only is quick and convenient to assemble, does not have the problem of accumulated tolerance and is unnecessary to set strict requirements on dimension precision, but also the magnet buckle slabs and magnet gaskets can be manufactured by impact molding so as to simplify the production process and reduce the cost.

Description

technical field [0001] The invention relates to a motor rotor structure, in particular to a motor rotor structure with few parts and components, simple structure and no need for too strict requirements on dimensional precision, so as to reduce production cost. Background technique [0002] Such as figure 1 As shown, the conventional brushless DC motor rotor structure includes a plurality of magnets 10 , a plurality of silicon steel sheets 20 , a plurality of fixing bolts 30 and two end cover plates 40 . [0003] Wherein, the magnet 10 is an arc-shaped plate body, and its two sides are formed with symmetrical slopes 11, so that the sides of the two magnets 10 can form a dovetail groove 12 when they are kept in parallel at an appropriate distance. [0004] The silicon steel sheet 20 is a thin circular plate, with a central hole 21 in the center for an axis (not shown) to penetrate, and a plurality of equidistant circular holes 22 arranged around the periphery, and the circula...

AI Technical Summary

Problems solved by technology

[0010] (1) There are many parts and complex structures: in the conventional structure, the fixing bolts must first be inserted into the circular holes of the stacked silicon steel sheets, and then the dovetail slots formed by the parallel arrangement of the dovetail blocks and the magnets are used for wedge fit. The two end covers are respectively fixed on the ends of the magnet, and adhesive must be applied between the parts to fix them, the assembly process is quite cumbersome

[0011] (2) High dimensional precision requirements: Due to the large number of components in the conventional structure, the cumulative tolerance during assembly will be large, so the dimensional precision requirements for components are also relatively high

[0012] (3) High production cost: This conventional structure includes at least three production processes. The first process is to produce silicon steel sheets by stamping. The second process is to produce fixing bolts and end cover plates by injection molding. The third process The magnet is produced by wire cutting, so the production cost remains high

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