Rotor punching sheet of permanent magnet direct drive motor and permanent magnet direct drive motor thereof

Abstract

The utility model relates to a rotor punching sheet of a permanent magnet direct drive motor and the permanent magnet direct drive motor thereof, comprising a plurality of bodies which are connected end to end to form the rotor punching sheet; the magnetic steel grooves are formed in the radial direction of the body; magnetic isolation protrusions are arranged on the two side walls of the magnetic steel groove in a protruding mode. The top of each magnetic steel groove is provided with a magnetic isolation bridge. A plurality of bodies can be spliced to form an annular punching sheet, a magnetic steel is embedded in a magnetic steel groove of each body, the magnetic steel is limited between a magnetic isolation protrusion and a magnetic isolation bridge, the magnetic steel is installed in the magnetic steel groove, an empty groove is formed in the bottom of the magnetic steel, the empty groove plays a magnetic isolation role, and magnetic leakage of a magnetic attraction line is also avoided; and the magnetic isolation bridge also plays a magnetic isolation role and can shield harmonic waves, so that heating of the magnetic steel is avoided, and installation of the magnetic steel is realized.

Description

Technical Field

[0001] The utility model relates to an electronic punching sheet, in particular to a rotor punching sheet of a permanent magnet direct drive motor and a permanent magnet direct drive motor. Background Art

[0002] In a permanent magnet direct drive motor, magnetic steel needs to be installed, such as Figure 1 , 2 As shown, conventionally, the magnetic steel and the magnetic isolation aluminum strip need to be installed on the magnetic steel frame, and then installed on the rotor bracket by bolts. This connection method has the following disadvantages: 1. Due to the use of bolts, there is a risk of loosening and falling off, causing scratches on the stator and rotor and burning the motor; 2. The bolts need to be installed between the two plates, which is very troublesome to install; 3. The upper surface of the magnetic steel is exposed and easily contaminated;

[0003] In summary, how to install magnetic steel has become an urgent problem that researchers in the version field need to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to realize the installation of magnetic steel;

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The utility model is a rotor punching sheet of a permanent magnet direct drive motor, comprising: a plurality of bodies, which are connected end to end to form the rotor punching sheet; a magnetic steel slot, which is opened along the radial direction of the body; two side walls of the magnetic steel slot are protrudingly provided with magnetic isolation protrusions; the top of the magnetic steel slot is provided with a magnetic isolation bridge; when the magnetic steel is inserted into the magnetic steel slot and is limited between the magnetic isolation bridge and the magnetic isolation protrusion, an empty slot is formed between the magnetic steel and the magnetic steel slot;

[0007] In the present scheme, multiple bodies can be spliced ​​into ring-shaped punching sheets, and the curvature of each body can be divided by 360. A magnet is embedded in the magnetic steel slot of each body. The magnet is limited between the magnetic isolation protrusion and the magnetic isolation bridge. The magnet is installed in the magnetic steel slot, and an empty slot is formed at the bottom of the magnet. The empty slot plays a magnetic isolation role and also avoids magnetic leakage of the magnetic attraction line; the magnetic isolation bridge also plays a magnetic isolation role, and can also shield harmonics and avoid heating of the magnet, thereby realizing the installation of the magnet.

[0008] In this way, the magnet is embedded, avoiding the use of bolts and avoiding the exposure of part of the magnet, thereby improving the anti-corrosion performance.

[0009] In order to limit the axial movement of the magnetic steel, the punching sheets are fixed to both sides of the punching sheets by pull rods and end faces during the stacking process to limit the axial movement of the magnetic steel.

[0010] How to realize the axial connection of multiple bodies, the utility model adopts that the two sides of the body are respectively provided with a lock body and a buckle body; the lock body includes: an extension rod, which is arranged on one side of the body, and a semi-circular protrusion is arranged at its end; the buckle body includes: a long groove, which is opened inwardly along the body and is suitable for matching with the extension rod; a semi-circular groove, which is opened in the body and located at the end of the long groove, and is suitable for matching with the semi-circular protrusion;

[0011] The two adjacent bodies are axially inserted and connected, the semicircular protrusion is placed in the semicircular groove, and the extension rod is placed in the long groove, so that the two bodies are connected. In this way, multiple bodies are connected into a ring structure.

[0012] In order to reduce the weight and dissipate heat of the rotor, the utility model adopts a plurality of ventilation and weight reduction holes opened on the main body; the ventilation and weight reduction holes are located between the two magnetic steel slots;

[0013] By opening ventilation and weight-reducing holes on the body, the weight of the rotor can be reduced and heat can be dissipated, so that the starting inertia of the rotor is small.

[0014] The rotor punchings in this scheme are applied to a permanent magnet direct drive motor. The rotor punchings are stacked, and after stacking, the rotor punchings are embedded with magnetic steel and fixed by pull rods. The rotor assembly of the permanent magnet direct drive motor formed in this way has good air permeability, heat dissipation and magnetic isolation properties.

[0015] The beneficial effects of the utility model are as follows: the utility model is a rotor punching sheet of a permanent magnet direct-drive motor, and a plurality of bodies can be spliced ​​into a ring-shaped punching sheet, and a magnet is embedded in the magnetic steel slot of each body, and the magnet is limited between the magnetic isolation protrusion and the magnetic isolation bridge, and the magnet is installed in the magnetic steel slot. An empty slot is formed at the bottom of the magnet, and the empty slot plays a magnetic isolation role and also avoids magnetic leakage of the magnetic attraction line; the magnetic isolation bridge also plays a magnetic isolation role, and can also shield harmonics, avoid heating of the magnet, and realize the installation of the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the traditional magnetic steel connection method;

[0018] Figure 2 yes Figure 1 Side view of the middle punch;

[0019] Figure 3 It is a structural schematic diagram of the utility model;

[0020] In the figure: 1-main body, 2-magnetic steel groove, 3-magnetic isolation protrusion, 4-magnetic isolation bridge, 5-magnetic steel, 6-empty slot, 7-buckle body, 71-long slot, 72-semicircular slot, 8-lock body, 81-extension rod, 82-semicircular protrusion, 9-ventilation and weight reduction hole. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] like Figure 3 As shown, the utility model is a rotor punching of a permanent magnet direct drive motor, comprising: a plurality of bodies 1, which are connected end to end to form a rotor punching; a magnetic steel slot 2, which is opened radially along the body 1; both side walls of the magnetic steel slot 2 are protrudingly provided with magnetic isolation protrusions 3; the top of the magnetic steel slot 2 is provided with a magnetic isolation bridge 4; a magnetic steel 5 is inserted into the magnetic steel slot 2, and is limited between the magnetic isolation bridge 4 and the magnetic isolation protrusion 3; the magnetic steel 5 and the magnetic steel slot 2 form an empty slot 6; when the magnetic steel 5 is inserted into the magnetic steel slot 2, and is limited between the magnetic isolation bridge 4 and the magnetic isolation protrusion 82, an empty slot 6 is formed between the magnetic steel 5 and the magnetic steel slot 2;

[0023] In the present scheme, multiple bodies can be spliced ​​into ring-shaped punching sheets, and the curvature of each body can be divided by 360. A magnet is embedded in the magnetic steel slot of each body. The magnet is limited between the magnetic isolation protrusion and the magnetic isolation bridge. The magnet is installed in the magnetic steel slot, and an empty slot is formed at the bottom of the magnet. The empty slot plays a magnetic isolation role and also avoids magnetic leakage of the magnetic attraction line; the magnetic isolation bridge also plays a magnetic isolation role, and can also shield harmonics and avoid heating of the magnet, thereby realizing the installation of the magnet.

[0024] In this way, the magnet is embedded, avoiding the use of bolts and avoiding the exposure of part of the magnet, thereby improving the anti-corrosion performance.

[0025] In order to limit the axial movement of the magnetic steel, the punching sheets are fixed to both sides of the punching sheets by pull rods and end faces during the stacking process to limit the axial movement of the magnetic steel.

[0026] like Figure 3 As shown, how to realize the axial connection of multiple bodies, the utility model adopts that the two sides of the body are respectively provided with a lock body 8 and a buckle body 7; the lock body includes: an extension rod 81, which is arranged on one side of the body 1, and a semi-circular protrusion 82 is arranged at its end; the buckle body 7 includes: a long groove 71, which is opened inwardly along the body 1 and is suitable for matching with the extension rod 81; a semi-circular groove 72, which is opened in the body 1 and is located at the end of the long groove 71, and is suitable for matching with the semi-circular protrusion 82;

[0027] The two adjacent bodies are axially inserted and connected, the semicircular protrusion is placed in the semicircular groove, and the extension rod is placed in the long groove, so that the two bodies are connected. In this way, multiple bodies are connected into a ring structure.

[0028] like Figure 3 As shown, in order to achieve weight reduction and heat dissipation of the rotor, the utility model adopts a plurality of air-permeable and weight-reducing holes 9 on the main body 1; the air-permeable and weight-reducing holes 9 are located between the two magnetic steel slots 2;

[0029] By opening ventilation and weight-reducing holes on the body, the weight of the rotor can be reduced and heat can be dissipated, so that the starting inertia of the rotor is small.

[0030] The rotor punchings in this scheme are applied to a permanent magnet direct drive motor. The rotor punchings are stacked, and after stacking, the rotor punchings are embedded with magnetic steel and fixed by pull rods. The rotor assembly of the permanent magnet direct drive motor formed in this way has good air permeability, heat dissipation and magnetic isolation properties.

[0031] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rotor punching sheet for a permanent magnet direct drive motor, characterized in that: include: A plurality of bodies connected end to end to form the rotor punching sheet; A magnetic steel groove is provided along the radial direction of each of the main bodies; The two side walls of the magnetic steel groove are protruded with magnetic isolation protrusions; The top of the magnetic steel slot is provided with a magnetic isolation bridge.

2. The rotor punching sheet of the permanent magnet direct drive motor according to claim 1, characterized in that: A lock body and a buckle body are respectively arranged on both sides of the body; The lock body comprises: An extension rod, which is arranged on one side of the main body and has a semicircular protrusion at its end; The buckle body comprises: A long slot, which is opened inwardly along the body and is suitable for cooperating with the extension rod; A semicircular groove is provided in the main body and is located at the end of the long groove, and is suitable for cooperating with the semicircular protrusion.

3. The rotor punching sheet of the permanent magnet direct drive motor according to claim 1, characterized in that: The main body is provided with a plurality of ventilation and weight-reducing holes; The air permeable and weight-reducing hole is located between the two magnetic steel grooves.

4. A permanent magnet direct drive motor, characterized in that: A rotor punching sheet comprising a permanent magnet direct drive motor as described in any one of claims 1 to 3.

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