Rotor pressing plate with offset center of gravity

Abstract

The utility model discloses a rotor pressing plate with an offset center of gravity, which comprises a steel sleeve and a pressing plate body, and the steel sleeve is nested in a central counter bore of the pressing plate body; a weight reducing groove is formed in the pressing plate body, and a pressing plate key groove is formed in an inner hole of the steel sleeve. The rotor pressure plate has the advantages of light weight, low price, easy drilling of de-weight holes, magnetic flux leakage prevention and high mechanical strength; the center of gravity of the steel sleeve embedded in the rotor pressing plate is set to be offset, so that the center of gravity is far away from the pressing plate key groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor manufacturing technical field especially is a kind of gravity bias formula rotor pressing plate. BACKGROUND

[0002] Current new energy automobile motor application is more and more widely, rotor pressing plate on motor rotor assembly is generally made of aluminum part, with light weight, leakage magnetic, easy to drill weight hole and so on, with the requirement of motor torque, power is higher and higher, aluminum rotor pressing plate has not satisfied strength requirement, in the long-term operation process of motor, rotor pressing plate has broken, leading to motor failure. For this, people develop a kind of rotor pressing plate of stainless steel material, is obtained by turning, but this pressing plate is high in price, heavy in quality, and not easy to drill weight hole, drill bit wears fast, production efficiency is low, has been unable to meet the demand of existing product. Now it is urgent to develop a new rotor pressing plate, which requires high mechanical strength, light weight, low price, easy to drill weight hole, and also requires leakage magnetic. SUMMARY

[0003] The utility model aims at providing a kind of gravity bias formula rotor pressing plate, to solve the above problems.

[0004] The technical scheme adopted by the utility model is as follows: a kind of gravity bias formula rotor pressing plate, including steel sleeve and pressing plate body, the steel sleeve is embedded in the center sink hole of pressing plate body;Weight reduction groove is opened on the pressing plate body, and the inner hole of steel sleeve is provided with pressing plate key groove.

[0005] Further, the weight reduction groove on the pressing plate body is annular array.

[0006] Further, the steel sleeve is cut on three sides, and the middle surface cut off is perpendicular to both sides, forming a left-right symmetrical anti-rotation structure.

[0007] Further, the steel sleeve is opened with weight hole arranged in fan shape, and the weight hole is close to the side of pressing plate key groove.

[0008] Further, the steel sleeve is provided with a stepped structure, the thickness of the outer ring is small, and the thickness of the inner ring is large.

[0009] Further, the steel sleeve or the pressing plate body is provided with an anti-rotation structure, and the anti-rotation structure is a convex, sunken or sawtooth structure.

[0010] Further, the weight hole is a weight increasing structure.

[0011] The utility model has the beneficial effects that: the utility model discloses a rotor pressing plate which is light in weight, low in price, easy to drill a weight-removing hole, prevents magnetic leakage, and has high mechanical strength; the steel sleeve gravity center embedded in the rotor pressing plate is arranged in an offset mode, so that the gravity center is far away from the pressing plate key groove. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front structure schematic view of the utility model;

[0013] Figure 2 It is a back structure schematic view of the utility model;

[0014] Figure 3 It is a structure schematic view of the steel sleeve;

[0015] Figure 4 It is another structure schematic view of the steel sleeve;

[0016] Figure 5 It is a sectional view of another structure of the steel sleeve;

[0017] Figure 6 It is a sectional view of the pressing plate body in the utility model;

[0018] In the drawing: 1-pressing plate body, 2-steel sleeve, 3-weight-removing groove, 4-pressing plate key groove, 5-weight-removing hole, 6-anti-rotation structure. DETAILED DESCRIPTION

[0019] The utility model will be further described in combination with the drawings.

[0020] As shown in Figure 1 And Figure 2 The utility model discloses a gravity center offset type rotor pressing plate, including steel sleeve 2 and pressing plate body 1, steel sleeve 2 is embedded to the center sink hole place of the pressing plate body 1 of the material for aluminum through casting, make steel sleeve 2 and pressing plate body 1 tightly combine together. The center sink hole place of pressing plate body 1 is equipped with a step, makes the inner diameter of the center hole of pressing plate body 1 and steel sleeve 2 similar. Pressing plate body 1 is equipped with annular array type weight-removing groove 3, and the inner hole of steel sleeve 2 is equipped with pressing plate key groove 4.

[0021] As shown in Figure 3As shown, the three sides of the pressing plate body 1 are cut, and the cut middle side is perpendicular to the two sides, forming a left-right symmetrical anti-rotation structure 6. After the three sides of the steel sleeve 2 are cut, the steel sleeve 2 can be prevented from rotating in the pressing plate body 1, and at the same time, the center of gravity of the steel sleeve 2 can be offset from the center of the circle, forming a bias structure away from the pressing plate key groove 4, and finally forming a bias rotor pressing plate with the center of gravity away from the pressing plate key groove 4.

[0022] The anti-rotation structure 6 in the utility model can also be arranged on the pressing plate body 1 or the steel sleeve 2, and is a convex, sunken or sawtooth structure, such as Figure 4 The weight-removing hole 5 in the utility model can also be an anti-rotation structure.

[0023] As shown in Figure 4 Another structure of the steel sleeve in the utility model is that a plurality of weight-removing holes 5 arranged in a fan shape are formed in the middle of the steel sleeve 2 close to one side of the pressing plate key groove. The weight-removing holes 5 make the steel sleeve 2 in a structure with the center of gravity eccentric, and the rotor pressing plate obtained after the steel sleeve 2 is combined with the pressing plate body 1 is also in a structure with the center of gravity eccentric. The rotor pressing plate with the structure is mounted on a rotor assembly also having a structure with the center of gravity eccentric, so that the amount of eccentricity of the center of gravity is neutralized, the amount of eccentricity of the center of gravity of the rotor assembly is reduced, and the number of weight-removing holes of the rotor assembly is reduced or the weight-removing holes are not needed to be drilled.

[0024] As shown in Figure 5 The steel sleeve 2 is provided with a stepped structure, the thickness of the outer circular ring is small, and the thickness of the inner circular ring is large. The outer circular ring is arranged on the left side, and when the weight-removing holes are drilled in the rotor pressing plate for dynamic balance, the holes are drilled from the right side of the pressing plate body 1, so that the steel sleeve 2 is not drilled, and at the same time, the steel sleeve 2 is embedded, so that the overall strength of the rotor pressing plate is enhanced.

[0025] The weight-removing hole 5 in the utility model can also be replaced by a weight-increasing structure.

Claims

1. A gravity biased rotor plate, steel sleeve and plate body characterized by: The steel sleeve is embedded in the center counterbore of the press plate body; the press plate body is provided with weight reduction grooves, and the inner hole of the steel sleeve is provided with press plate key grooves.

2. A center of gravity offset rotor platen according to claim 1 wherein: The weight reduction grooves on the press plate body are arranged in an annular array.

3. A center of gravity offset rotor platen according to claim 1 wherein: The steel sleeve is cut on three sides, and the cut middle surface is perpendicular to the two sides, forming a left-right symmetrical anti-rotation structure.

4. A center of gravity offset rotor platen according to claim 1 wherein: The steel sleeve is provided with weight removal holes arranged in a fan shape, and the weight removal holes are close to one side of the press plate key groove.

5. A center of gravity offset rotor platen according to claim 1 wherein: The steel sleeve is provided with a stepped structure, and the outer circular ring has a small thickness, and the inner circular ring has a large thickness.

6. A center of gravity offset rotor platen according to claim 1 wherein: The steel sleeve or the press plate body is provided with an anti-rotation structure, and the anti-rotation structure is a convex, sunken or zigzag structure.

7. A center of gravity offset rotor platen according to claim 4 wherein: The weight removal hole is a weight increase structure.

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