Magnetic-steel mounting structure

Abstract

The present invention relates to the technical field of the mounting of surface-mounted permanent magnets. Provided is a magnetic-steel mounting structure, comprising an electric motor housing (1), a magnetic-steel positioning cage (2), stator magnetic steel (3), a rotor (4) and an output shaft (5), wherein the electric motor housing (1) comprises a front housing (101), a rear housing (102) and a housing body (103); reserved magnetic-steel grooves (201) are provided on the surface of the magnetic-steel positioning cage (2); a positioning block (202) is provided on an inner wall of the magnetic-steel positioning cage (2); and a positioning mechanism (6) is provided on the surface of the rotor (4). The magnetic-steel positioning cage (2) is provided, and the reserved magnetic-steel grooves (201) are provided on the surface of the magnetic-steel positioning cage (2), which make it easy to bond the stator magnetic steel (3) in the reserved magnetic-steel grooves (201) in advance by means of an adhesive and then fix the rotor (4) in the magnetic-steel positioning cage (2), thereby avoiding damage to the stator magnetic steel (3) and the rotor (4) when same are directly mounted, reducing the risk of mounting errors, and also improving the operating efficiency to a certain extent; and the positioning mechanism (6) is provided to facilitate the fixing of the rotor (4) to the magnetic-steel positioning cage (2), such that the rotor (4), the stator magnetic steel (3) and the magnetic-steel positioning cage (2) can be mounted as a whole inside the electric motor housing.

Description

A magnet mounting structure Technical Field

[0001] This invention relates to the field of surface-mount permanent magnet mounting technology, and more particularly to a magnet mounting structure. Background Technology

[0002] In existing technologies, most are modular, which means that the magnet cover, iron core and permanent magnet are assembled in advance. However, during the installation process, there is an interaction between the soft magnet on the rotor surface and the stator magnet. If the installation is misaligned, it can easily damage the rotor and stator magnet. This affects the efficiency of the installation and can also damage the rotor or stator magnet, affecting normal use.

[0003] Therefore, a magnet mounting structure is designed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems mentioned in the background section.

[0005] The present invention adopts the following technical solution: a magnet mounting structure, including a motor housing, a magnet positioning cage, a stator magnet, a rotor and an output shaft. The motor housing includes a front shell, a rear shell and a housing. The surface of the magnet positioning cage is provided with a magnet reserved groove. The inner wall of the magnet positioning cage is provided with a positioning block. The surface of the rotor is provided with a positioning mechanism.

[0006] As a preferred embodiment of the magnet mounting structure of the present invention, the positioning mechanism includes a groove formed on the surface of the rotor and a fixing block fixed on the surface of the rotor. A spring pin is inserted into the surface of the fixing block. A slider is slidably connected inside the groove. An insert block is rotatably connected to the surface of the slider. A fixing hole is formed on the surface of the insert block.

[0007] In a preferred embodiment of the magnet mounting structure of the present invention, the stator magnet is bonded to the inside of the magnet pre-reserved slot by adhesive, and the rotor is fixed to the magnet positioning cage by a positioning mechanism.

[0008] As a preferred embodiment of the magnet installation structure of the present invention, the reserved slots for the magnets are distributed in a circumferential array on the surface of the magnet positioning cage.

[0009] As a preferred embodiment of the magnet mounting structure of the present invention, the surface of the positioning block is provided with a slot, and the shape and size of the slot are matched with those of the insertion block.

[0010] In a preferred embodiment of the magnet mounting structure of the present invention, the magnet positioning cage and the rotor are fixed together by a slot and a plug.

[0011] In a preferred embodiment of the magnet mounting structure of the present invention, the size of the spring pin is adapted to the fixing hole, and the insert block and the rotor are fixed together by the fixing hole and the spring pin.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0013] 1. In this invention, a magnet positioning cage is provided, and a magnet pre-reserved groove is opened on the surface of the magnet positioning cage. This facilitates the pre-bonding of the stator magnets into the magnet pre-reserved groove with glue, and then fixing the rotor in the magnet positioning cage. This avoids damage to the stator magnets and rotor when they are directly installed, reduces the risk of installation errors, and also improves work efficiency to a certain extent.

[0014] 2. In this invention, a positioning mechanism is provided to facilitate the fixing of the rotor and the magnet positioning cage, so that the rotor, stator magnet and magnet positioning cage are installed as a whole inside the motor housing. At the same time, by simply releasing the limit between the plug and the slot, the rotor and the magnet positioning cage can be separated inside the motor housing, avoiding affecting the normal rotation of the rotor. Meanwhile, the magnet positioning cage is still placed inside the motor housing, that is, the rotor and stator magnet are separated, which can also prevent the stator magnet from being damaged again during the rotation of the rotor. Attached Figure Description

[0015] Figure 1 is a schematic diagram of a magnet mounting structure proposed in this invention;

[0016] Figure 2 is a partial exploded view of a magnetic steel mounting structure proposed in this invention;

[0017] Figure 3 is a partial schematic diagram of the structure in Figure 2;

[0018] Figure 4 is an enlarged view of point A in Figure 3;

[0019] Figure 5 is a partial structural diagram of the prior art;

[0020] Figure 6 is a partial structural schematic diagram of the present invention;

[0021] Legend: 1. Motor housing; 101. Front housing; 102. Rear housing; 103. Housing; 2. Magnet positioning cage; 201. Magnet reserved slot; 202. Positioning block; 203. Slot; 3. Stator magnet; 4. Rotor; 5. Output shaft; 6. Positioning mechanism; 601. Slide groove; 602. Fixing block; 603. Spring pin; 604. Sliding block; 605. Insertion block; 606. Fixing hole; 7. Magnet protective sleeve. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example

[0025] Please refer to Figures 1-6. This invention provides a technical solution: a magnet mounting structure, including a motor housing 1, a magnet positioning cage 2, a stator magnet 3, a rotor 4, and an output shaft 5. The stator magnet 3 is glued to the inside of a pre-drilled slot 201. The rotor 4 is fixed to the magnet positioning cage 2 via a positioning mechanism 6. This allows for first fixing the rotor 4 to the magnet positioning cage 2, then fixing the stator magnet 3 to the surface of the magnet positioning cage 2. Subsequently, the rotor 4, the magnet positioning cage 2, and the stator magnet 3 can be directly placed into the motor housing 1 as a whole, avoiding direct installation that could damage the stator magnet 3 and the rotor 4. The motor housing 1 includes a front... The housing 101, rear housing 102, and housing 103 are all included. The surface of the magnet positioning cage 2 is provided with a magnet reserved groove 201. The magnet positioning cage 2 and the rotor 4 are fixed together by a slot 203 and an insert 605. The magnet reserved groove 201 is distributed in a circumferential array on the surface of the magnet positioning cage 2 to facilitate the installation of the stator magnet 3. The inner wall of the magnet positioning cage 2 is provided with a positioning block 202. The surface of the positioning block 202 is provided with a slot 203. The slot 203 and the insert 605 are matched in shape and size to facilitate the insertion of the insert 605 into the slot 203 to fix the magnet positioning cage 2 and the rotor 4. The surface of the rotor 4 is provided with a positioning mechanism 6.

[0026] The positioning mechanism 6 includes a groove 601 formed on the surface of the rotor 4 and a fixing block 602 fixed on the surface of the rotor 4. A spring pin 603 is inserted into the surface of the fixing block 602. The size of the spring pin 603 is adapted to the fixing hole 606. The insert block 605 is fixed to the rotor 4 through the fixing hole 606 and the spring pin 603. A slider 604 is slidably connected inside the groove 601. The insert block 605 is rotatably connected to the surface of the slider 604. The fixing hole 606 is formed on the surface of the insert block 605.

[0027] Working principle: In use, first, the magnet positioning cage 2 is placed on the surface of the rotor 4, and the spring pin 603 is pulled to disengage from the fixing hole 606. At this time, the insert block 605 can be released from its limit. Rotate the insert block 605 so that its opening faces downward, and slide the insert block 605 downward. The insert block 605 drives the slider 604 to slide inside the slide groove 601 until the insert block 605 is inserted into the slot 203. At this time, the rotor 4 and the magnet positioning cage 2 are fixed. Then, the stator magnet 3 is glued to the magnet reserved slot 201. After the stator magnet 3 is fixed, the rotor 4, the magnet positioning cage 2 and the stator magnet 3 become a whole. Then, the whole is placed inside the housing 103, and the stator magnet 3 is glued to the housing 103 again. At this time, the stator... The magnet 3 can be fixed between the housing 103 and the magnet positioning cage 2. Then, the output shaft 5 is fixed inside the rotor 4. After fixing, manually slide the insert 605 upward. The insert 605 drives the slider 604 to slide upward inside the slide groove 601 until the insert 605 is completely disengaged from the slot 203. Then rotate the insert 605. The insert 605 rotates on the surface of the slider 604 and pulls the spring pin 603 until the fixing hole 606 and the spring pin 603 are aligned. Then release the spring pin 603. The spring pin 603 can be inserted into the fixing hole 606. Then the insert 605 can be fixed on the surface of the rotor 4. Then fix the front shell 101 and the rear shell 102 to the front and rear sides of the housing 103 respectively. At this time, the motor housing 1 can be installed.

[0028] The present invention may further include a magnet protective sleeve 7, which is fitted over the rotor module. Both ends of the magnet protective sleeve 7 are provided with flanges rolled out using a rolling head. The two flanges respectively abut against the two end faces of the rotor module. A positioning mechanism 6 is disposed on the magnet protective sleeve 7. Compared to a design that fixes the positioning mechanism to the rotor, this design offers the advantages of convenient production and processing. More importantly, by replacing different magnet protective sleeves, a positioning mechanism compatible with the slot 203 on the magnet positioning sleeve can be selected.

[0029] During installation, the rotor module can be first installed into the magnet positioning sleeve 7 or the motor housing, and then the magnet protective sleeve can be inserted. The ends of the magnet protective sleeve are rolled to form flanges. During disassembly, the motor can be removed together. Since the magnet protective sleeve of the invention directly covers the entire rotor module, it has better integrity and a larger area than the magnet protective sleeve of the prior art. Therefore, it is not easy for the motor to be attracted by the stator core during disassembly and assembly.

[0030] A first annular groove is provided at the junction of the flange and the magnet protective sleeve. The opening of the first groove faces the rotor module, and the spacing between the groove walls gradually increases from the bottom to the opening. This guides the magnet protective sleeve to deform at this point, making the rolling flange easier and resulting in better consistency after rolling.

[0031] The flanged edge is beveled, with its thickness decreasing towards the output shaft. Two end caps are also fitted onto the output shaft, located at opposite ends of the rotor module. The outer edges of these end caps are also beveled, with their thickness increasing towards the output shaft. The flanged edge is inserted between the end cap and the rotor module, with the beveled surface of the flange abutting against the beveled surface of the end cap. This design uses the end caps to restrict the position of the magnet protective sleeve, further preventing it from being attracted to the stator core.

[0032] The flange also features a strip-shaped notch, perpendicular to the first groove. The maximum distance from the notch to the center axis of the output shaft is greater than the maximum distance from the end cover to the center axis of the output shaft. During motor removal, a pry tool can be inserted into the notch to easily pry up the flange, making it easier to separate the magnet protective sleeve and the rotor module.

[0033] The flange has a second annular groove, the opening of which faces away from the rotor module. The spacing between the groove walls of the second groove gradually increases from the bottom to the opening. The second groove is located on the side of the first groove closest to the edge of the flange. This guides the deformation of the magnet protective sleeve at this point, making the rolling flange easier and resulting in better consistency after rolling. More importantly, the second groove can work with the first groove to form an arc-shaped structure between the first and second grooves, using this arc-shaped structure to limit the distance between the magnet protective sleeve and the rotor module.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A magnet mounting structure, comprising a motor housing (1), a magnet positioning cage (2), a stator magnet (3), a rotor (4), and an output shaft (5), characterized in that: The motor housing (1) includes a front housing (101), a rear housing (102) and a housing (103). The surface of the magnet positioning cage (2) is provided with a magnet reserved groove (201). The inner wall of the magnet positioning cage (2) is provided with a positioning block (202). The surface of the rotor (4) is provided with a positioning mechanism (6).

2. The magnetic steel cover mounting structure according to claim 1, characterized in that: The positioning mechanism (6) includes a groove (601) formed on the surface of the rotor (4) and a fixing block (602) fixed on the surface of the rotor (4). A spring pin (603) is inserted into the surface of the fixing block (602). A slider (604) is slidably connected inside the groove (601). An insert (605) is rotatably connected to the surface of the slider (604). A fixing hole (606) is formed on the surface of the insert (605).

3. The magnetic steel cover mounting structure according to claim 2, characterized in that: The stator magnet (3) is glued to the inside of the magnet reserved slot (201), and the rotor (4) is fixed to the magnet positioning cage (2) by the positioning mechanism (6).

4. The magnetic steel cover mounting structure according to claim 3, characterized in that: The reserved slots (201) of the magnet are distributed in a circular array on the surface of the magnet positioning cage (2).

5. The magnetic steel cover mounting structure according to claim 4, characterized in that: The surface of the positioning block (202) is provided with a slot (203), and the shape and size of the slot (203) are matched with those of the insert block (605).

6. The magnetic steel cover mounting structure according to claim 5, characterized in that: The magnetic positioning cage (2) and the rotor (4) are fixed together by a slot (203) and a plug (605).

7. The magnetic steel cover mounting structure according to claim 6, characterized in that: The size of the spring pin (603) is adapted to the fixing hole (606), and the insert (605) and the rotor (4) are fixed together by the fixing hole (606) and the spring pin (603).

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