Magnetic steel anti-falling device of outer rotor hub motor

Abstract

The utility model relates to an outer rotor hub motor magnetic steel anti-falling device, which comprises a casing, magnetic steel and end covers respectively covering a left port and a right port of the casing, and the magnetic steel is fixedly arranged on the inner wall of the casing. The end cover is provided with a stop piece extending into the casing, the magnetic steel is arranged between the inner wall of the casing and the stop piece, and the stop piece abuts against the surface of the magnetic steel. According to the utility model, the problem that the magnetic steel falls off in the prior art is solved without changing the installation mode of the magnetic steel in the existing hub motor.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, in particular to a magnetic steel anti-falling device for an outer rotor hub motor. Background Art

[0002] The wheel hub motor is a driving component used in electric vehicles to drive the electric vehicles. Existing electric vehicle wheel hub motors include outer rotor motors and inner rotor motors. The outer rotor motors, such as Figure 1 As shown, it generally includes a housing (hub) 1, and the inner wall of the housing 1 is provided with magnetic steel 2 and a stator 5 arranged in a ring shape. Figure 2 As shown, several small pieces of magnetic steel 2 are continuously spliced ​​and pasted to the inner wall of the housing 1 by adhesive; or Figure 3 As shown, several small pieces of magnets 2 are continuously and spaced apart on the inner wall of the housing 1 by adhesive. Since the magnets 2 are purely attached to the inner wall of the housing 1 by adhesive without other fixing and limiting devices, during use, the temperature inside the motor and the use environment may cause the adhesive to reduce or even lose its adhesion, causing the magnets 2 to fall off, affecting the normal use of the motor.

[0003] The Chinese utility model patent (CN214479895U) discloses a permanent magnet motor housing, in which a cylindrical bracket matching the barrel is fixed in the barrel, the bracket is made of magnetic conductive material and contacts the inner wall of the barrel, and a circle of slots for magnets to be embedded are radially penetrated on the bracket, and multiple slots are evenly spaced along the circumference of the barrel. The bracket is an annular belt-shaped body, and a number of square hole-shaped slots are continuously distributed on the belt-shaped body. The slots are constrained by four boundaries for embedding and installing small pieces of magnets. When in use, small pieces of magnets can be embedded through the slots, and adjacent slots and slots are isolated by isolation columns, which also serves the purpose of reducing the amount of magnet material used.

[0004] However, because the slot for installing a small magnet on the bracket has four boundaries, this structure is very troublesome to install or repair (replace) the embedded magnet. The magnet can only be installed from the open opening of the slot. Especially when replacing a damaged magnet, the operation is more inconvenient due to the small operating space. Moreover, this technical solution can only be used for Figure 3 The magnetic steel arrangement shown cannot be used in Figure 2 The magnetic steel setting scheme shown.

[0005] In addition, since the hole is a structure that penetrates both the inner and outer sides of the strip, it is easy to cause magnetic leakage, especially from the outer side of the hole, which affects the use effect of the product. If the wheel rim is also made of iron, the defect of magnetic leakage is easy to be magnified. Utility Model Content

[0006] The utility model aims to provide a device for preventing the magnetic steel from falling off of an outer rotor hub motor, which solves the problem of the magnetic steel falling off in the prior art without changing the installation method of the magnetic steel in the existing hub motor.

[0007] To achieve the above purpose, the technical solution of the utility model is:

[0008] A device for preventing a magnet from falling off of an outer rotor hub motor comprises a casing, a magnet and end covers respectively covering the left and right ports of the casing, wherein the magnet is fixedly arranged on the inner wall of the casing; the end cover is provided with a stopper extending into the interior of the casing, the magnet is arranged between the inner wall of the casing and the stopper, and the stopper is pressed against the surface of the magnet.

[0009] The magnetic steels are fixedly arranged at intervals on the inner wall of the casing.

[0010] The stopper and the magnetic steel are arranged at intervals on the end cover correspondingly.

[0011] The magnets are closely attached to each other and spread all over the inner wall of the casing.

[0012] The stopper is a flange of the end cover extending toward the interior of the casing.

[0013] The end cover and the stopper are formed integrally.

[0014] The advantages of the utility model are: 1. It achieves the technical effect of preventing the magnet from falling off without changing the original installation method of the magnet, does not involve the replacement and modification of the production line, and has low technical modification cost; 2. The end cover is covered on the casing, and the stoppers on the end covers at both ends clamp the two ends of the magnet. Even if the adhesive loses its adhesion, the magnet will not fall off; 3. The stopper is integrally formed with the end cover, which is simple to manufacture and low in cost; 4. The original installation method of the motor magnet is not changed, and there will be no magnetic leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an existing outer rotor motor.

[0016] Figure 2 It is a schematic diagram of the continuous attachment of magnetic steel in the prior art.

[0017] Figure 3 It is a schematic diagram of the prior art magnetic steel interval attachment.

[0018] Figure 4 It is a schematic diagram of the structure of the outer rotor motor of the utility model.

[0019] Figure 5 yes Figure 4 Enlarged schematic diagram at point A in the middle.

[0020] Figure 6 It is an exploded view of the structure of the outer rotor hub motor containing the utility model.

[0021] Figure 7 This is a schematic diagram of the end cover structure of the utility model Figure 1 .

[0022] Figure 8 This is a schematic diagram of the end cover structure of the utility model Figure 2 .

[0023] In the figure: 1- housing; 2- magnet; 3- end cover; 4- stopper; 5- stator. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings. The accompanying drawings are only used for exemplary description and cannot be understood as limiting the present patent.

[0025] In order to more concisely describe the present embodiment, some parts known to those skilled in the art but not related to the main content of the present invention are omitted in the drawings or descriptions. In addition, for the convenience of description, some parts in the drawings are omitted, enlarged or reduced, but they do not represent the size or entire structure of the actual product.

[0026] The utility model discloses a magnetic steel anti-dropping device for an outer rotor hub motor, such as Figure 4-8 As shown, it includes a housing 1, a magnet 2 and end covers 3 covering the left and right ports of the housing respectively. The magnet 2 is fixedly arranged on the inner wall of the housing 1; the magnet 2 can be as follows Figure 2 The plurality of magnets 2 shown are continuously arranged on the inner wall of the housing 1 close to each other to form a magnet ring; Figure 3 The magnets 2 are evenly arranged at intervals on the inner wall of the housing 1. Generally, the magnets 2 are attached to the inner wall of the housing 1 by adhesive.

[0027] like Figure 7 , Figure 8 As shown, the end cover 3 is provided with a stopper 4 extending into the interior of the housing, and the stopper 4 can be Figure 2 or Figure 3 In the arrangement of the magnetic steel 2 shown in the figure, the stopper 4 can be a flange of the end cover extending toward the inside of the housing 1; the stopper 4 can also be arranged at intervals on the end cover 3 corresponding to the magnetic steel 2 arranged at intervals. Of course, the arrangement of the stopper 4 as a flange extending toward the inside of the housing 1 can be generally used in Figure 2 , Figure 3 The magnetic steel 2 is set as shown.

[0028] The purpose of setting the stopper 4 on the end cover 3 is to set the magnetic steel 2 between the inner wall of the housing 1 and the stopper 4. Figure 4-6 As shown, when the end cover 3 covers the port of the casing 1, the stopper 4 presses against the surfaces of the two ends of the magnet 2, and the stopper 4 of the end cover 3 at both ends of the casing 1 clamps the two ends of the magnet 2, so that the magnet 2 will not fall off.

[0029] The utility model achieves the purpose of fixing the magnetic steel 2 so that it will not fall off by arranging the stopper 4 on the end cover 3. Moreover, the technical solution does not change the structure of the original hub motor, and only the stopper 4 is arranged on the end cover 3, which is very convenient to implement.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should be within the technical scope of the present invention.

Claims

1. A device for preventing a magnetic steel from falling off of an outer rotor hub motor, comprising a housing (1), a magnetic steel (2), and end covers (3) respectively covering left and right ports of the housing, wherein the magnetic steel (2) is fixedly arranged on the inner wall of the housing (1); characterized in that: The end cover (3) is provided with a stopper (4) extending into the interior of the housing, the magnetic steel (2) is arranged between the inner wall of the housing (1) and the stopper (4), and the stopper (4) is pressed against the surface of the magnetic steel (2).

2. The outer rotor hub motor magnetic steel anti-dropping device according to claim 1 is characterized in that: The magnetic steels (2) are fixedly arranged at intervals on the inner wall of the casing (1).

3. The outer rotor hub motor magnetic steel anti-dropping device according to claim 2 is characterized in that: The stopper (4) and the magnetic steel (2) are arranged on the end cover (3) at intervals corresponding to each other.

4. The outer rotor hub motor magnetic steel anti-dropping device according to claim 1, characterized in that: The magnetic steels (2) are arranged close to each other and cover the entire inner wall of the casing (1).

5. The outer rotor hub motor magnetic steel anti-dropping device according to claim 1, characterized in that: The stopper (4) is a flange of the end cover extending toward the interior of the casing (1).

6. The outer rotor hub motor magnetic steel anti-dropping device according to claim 1, characterized in that: The end cover (3) and the stopper (4) are integrally formed.

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