Electric motor for electric cars

Abstract

The present invention relates to an electric motor mainly for use in electric cars and the like, and more particularly, to an electric motor for electric cars in which: a joint retaining part for preventing a support from releasing from joint by covering one surface of the support and of a fixing shaft coupling part is coupled to the support by a coupling means, thereby preventing a fixing shaft from separating from the support; bent portions are formed on both sides of a first protruding end of the joint retaining part, the first protruding end covering the end portions of the support, thereby preventing the first and second end portions of the support from separating, wherein the bent portions are coupled to both sides of the first and second end portions while the joint retaining part covers the one surface of the support and of the fixing shaft coupling part, thereby preventing the first and second end portions of the support from separating from each other; and magnets are not directly adhered to the inside of a housing by means of an adhesive but cores are additionally included in the housing in such a manner that the cores are fixedly coupled to the inside of the housing, and have magnet insertion grooves into which magnets can be inserted and which have an equal distance therebetween, thereby preventing safety problems due to the separation of the magnets while the motor is on, and maximizing magnetomotive force by maintaining an accurate distance between the magnets.

Description

Technical field [0001] The present invention relates to a motor mainly used for electric vehicles and the like, and more particularly to an electric motor for an electric vehicle. A restraint maintaining part that covers the connecting part of a bracket and a fixed shaft and prevents the bracket from being released from restraint is connected to the bracket by means of a connecting device. The fixed shaft can be prevented from detaching from the bracket; in particular, a coupling groove formed by a depression is formed on one side of the bracket, and a coupling protrusion formed by protruding at a position corresponding to the coupling groove is formed on the side of the restraint maintaining portion, by means of the coupling The combination of the groove and the coupling protrusion makes the restraint between the restraint maintaining part and the bracket strong, and can prevent the fixed shaft from detaching from the bracket; in order to prevent the first end and the second end...

AI Technical Summary

Problems solved by technology

[0004] especially if figure 1 As shown, in conventional electric motors (especially electric motors mainly used in vehicles using electric motors such as electric vehicles or electric locomotives), electric wires (c) introduced into the inside of the motor casing (b) are passed through the rotor (b1) that constitutes the rotating The structure introduced by the through hole (a1) formed on the fixed shaft (a) in the center, therefore, due to the space of the through hole (a1) formed inside the fixed shaft (a), its durability will inevitably be weakened, especially for If more magnetomotive force is generated and the wire (c) is thickened or the number of wires (c) is increased, correspondingly, the fixed shaft (a) and the through hole (a1) formed inside it will inevitably increase in size. Large, implying the disadvantage that the volume and weight of the motor are relatively increased

In addition, since the electric wire (c) drawn out through the through hole (a1) of the fixed shaft (a) is inevitably exposed to the outside, when the electric vehicle (especially an electric vehicle) slips due to an accident or the like, it is connected to the There are frequent problems that the side of the motor of the wheel slips against the road, or the wire (c) is easily damaged due to other external factors, etc.

[0005] Additionally, if figure 2 As shown, from the perspective of the combination structure of the fixed shaft (a) and the bracket (d) in the conventional motor, it is only on one side of the bracket (d) that supports the fixed shaft (a), only by using a threaded combination The nut (e) on the fixed shaft (a) is used to connect the fixed shaft (a) and the bracket (d). Therefore, when the nut (e) becomes loose due to various driving shocks, etc., The fixed shaft (a) is easily detached from the bracket (d), so that problems such as safety accidents often occur

[0006] Additionally, if image 3 As shown, from the combination structure of the rim (f) that fixes the rotor (b1) and the wheel (g) in the conventional motor, the structure adopted is to use another structure such as angle steel (h), so that the One side of the angle steel (h) is connected to the rotor (b1) by means of bolts, and the other side of the angle steel (h) is fixed to the bottom surface of the rim (f) by means of welding, therefore, by means of bolts Due to the constraints of the narrow space, there is a problem that the operation of combining the angle steel (h) with the rotor (b1) is difficult to proceed smoothly

In addition, as for the work of joining between the angle steel (h) and the rim (f) by means of welding, due to the heat generated in the welding work, not only the angle steel (h) but also the rim (f) Deformation occurs in the rim (f), which causes the shape of the combined rim (f) to be further away from the true circle shape. There is a problem that the rim (f) and the wheel (g) cannot achieve rotational balance. Furthermore, due to the above complicated process, work is required. Time and cost, resulting in the problem that the process is difficult to carry out efficiently

[0007] Additionally, if Figure 4 As shown, in view of the structure in which the magnets (i) are attached to the inner peripheral surface of the rotor (b1) by using an adhesive in the conventional motor, the magnets (i) are attached to the rotor one by one at predetermined intervals by using an adhesive in the past. (b1) The inner peripheral surface is formed, so the attachment process using an adhesive is complicated, and it is not efficient in terms of manufacturing time and cost

Forming the magnets (i) at exactly predetermined intervals is also almost impossible when considering the cumulative tolerances etc. The problem of low momentum, especially when the magnet (i) is detached from the rotor (b1) during driving due to driving shock, etc., the problem of safety accidents due to the detached magnet (i)

In addition, in the method of attaching the magnet (i) to the inner peripheral surface of the rotor (b1), the housing (b) including the rotor (b1) must be made of steel, so the weight of the housing (b) itself becomes heavy, and the Inefficiency due to excess weight occurs

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