Rotor steel cylinder and permanent magnet electric roller

Abstract

The utility model discloses a rotor steel cylinder and a permanent magnet electric roller with the same. The rotor steel cylinder comprises a cylindrical body. The cylindrical body comprises an insertion end used for being inserted into a stator iron core, a tail end opposite to the insertion end and a cylinder body located between the insertion end and the tail end, the inner side of the cylinder body comprises an assembling section close to the insertion end and a fixing section close to the tail end and used for fixing magnetic steel, and the assembling section is provided with a protrusion arranged along the circumference of the cylinder body and close to the fixing section; the inner diameter of the protrusion is smaller than the inner diameter of the magnetic steel in the cylinder after the magnetic steel is fixed and larger than the outer diameter of the stator core, and the protrusion comprises a guide inclined plane facing the insertion end. The arrangement of the protrusions prevents the stator iron core from leaning to one side due to the attraction of the magnetic steel to cause difficult assembly in the process of inserting the stator iron core into the rotor steel cylinder, and plays a role in protecting the magnetic steel to prevent the stator iron core from bumping against the magnetic steel in the process of inserting the stator iron core into the rotor steel cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet electric rollers, in particular to a rotor steel drum and a permanent magnet electric roller. Background Art

[0002] Permanent magnet electric drums are widely used in various fields due to their superior electrical performance, such as machine tools, textiles, elevators, conveyors and other driving occasions. Permanent magnet electric drums include a rotor steel cylinder, a number of magnets fixed to the inner wall of the rotor steel cylinder, and a stator core inserted into the rotor steel cylinder. However, during the process of inserting the stator core into the rotor steel cylinder, the magnets' suction force easily causes the stator core to lean to one side, making assembly more difficult and easily bumping the magnets. Utility Model Content

[0003] The utility model aims to provide a magnetic steel for a motor.

[0004] To achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a rotor steel cylinder, which includes a cylindrical body, the cylindrical body includes an insertion end for inserting a stator core, a tail end opposite to the insertion end, and a cylinder located between the insertion end and the tail end, the inner side of the cylinder includes an assembly section adjacent to the insertion end and a fixing section adjacent to the tail end and used to fix the magnetic steel, the assembly section is adjacent to the fixing section and is provided with a protrusion arranged along the circumference of the cylinder, the inner diameter of the protrusion is smaller than the inner diameter of the magnetic steel in the cylinder after being fixed and larger than the outer diameter of the stator core, and the protrusion includes a guiding slope toward the insertion end.

[0005] As a further improved technical solution of the utility model, the inclination angle range of the guiding slope is 26°-29°.

[0006] As a further improved technical solution of the utility model, the difference between the inner diameter of the protrusion and the inner diameter of the magnetic steel in the cylinder after being fixed is 1-3mm, and the difference between the inner diameter of the protrusion and the outer diameter of the stator core is 1-3mm.

[0007] As a further improved technical solution of the utility model, the height range of the protrusion relative to the inner wall of the cylinder located at the fixed section is 8-12 mm.

[0008] As a further improved technical solution of the utility model, the protrusion also includes a guide plane connected to the guide slope, and the guide plane is parallel to the inner wall of the cylinder located at the fixed section.

[0009] As a further improved technical solution of the utility model, the width of the guide plane along the axial direction of the cylinder is in the range of 8-12 mm.

[0010] As a further improved technical solution of the present utility model, the protrusion further includes a step portion for limiting the magnetic steel, and the step portion is disposed on the other side of the protrusion relative to the guiding inclined surface.

[0011] As a further improved technical solution of the present utility model, the height of the step portion relative to the inner wall of the cylinder body ranges from 1 to 3 mm, and the width ranges from 3 to 6 mm.

[0012] As a further improved technical solution of the present utility model, the insertion end includes a first fixing hole, and the tail end includes a second fixing hole.

[0013] The present utility model also discloses a permanent magnet electric roller, which includes a rotor steel cylinder, a plurality of magnetic steels fixed in the rotor steel cylinder, and a stator iron core inserted into the rotor steel cylinder, and the rotor steel cylinder is the rotor steel cylinder as described above.

[0014] The beneficial effects of the present utility model are as follows: The setting of the protrusion avoids the difficult assembly caused by the stator iron core leaning to one side due to the suction force of the magnetic steel during the process of inserting the stator iron core into the rotor steel cylinder, and plays a protective role for the magnetic steel to prevent the stator iron core from knocking against the magnetic steel during the process of inserting the stator iron core into the rotor steel cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the rotor steel cylinder of the present utility model with magnetic steels installed;

[0016] Figure 2 is Figure 1 a partial enlarged schematic diagram of the circled I part in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings. Please refer to the drawings shown, which are the preferred embodiments of the present utility model. It should be noted, however, that these embodiments are not intended to limit the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0018] The present utility model discloses a rotor steel cylinder, which comprises a cylindrical body. The cylindrical body includes an insertion end for inserting into a stator core, a tail end opposite to the insertion end, and a cylinder body located between the insertion end and the tail end. The inner side of the cylinder body includes an assembly section adjacent to the insertion end and a fixing section adjacent to the tail end and used for fixing a magnet. A protrusion arranged along the circumference of the cylinder body is provided adjacent to the fixing section in the assembly section. The inner diameter of the protrusion is smaller than the inner diameter of the cylinder body after the magnet is fixed and larger than the outer diameter of the stator core. The protrusion includes a guiding inclined surface facing the insertion end. The arrangement of the protrusion avoids the difficult assembly caused by the stator core leaning to one side due to the suction force of the magnet during the process of inserting the stator core into the rotor steel cylinder, and plays a protective role for the magnet, preventing the stator core from knocking against the magnet during the process of inserting the stator core into the rotor steel cylinder.

[0019] Further, the inclination angle range of the guiding inclined surface is 26°-29°, the difference between the inner diameter of the protrusion and the inner diameter of the cylinder body after the magnet is fixed is 1-3 mm, the difference between the inner diameter of the protrusion and the outer diameter of the stator core is 1-3 mm, and the height range of the protrusion relative to the inner wall of the fixing section of the cylinder body is 8-12 mm, which has a good guiding effect.

[0020] Further, the protrusion further includes a guiding plane connecting the guiding inclined surface. The guiding plane is parallel to the inner wall of the fixing section of the cylinder body, and the width range of the guiding plane along the axial direction of the cylinder body is 8-12 mm.

[0021] Further, the protrusion further includes a stepped portion for limiting the magnet. The stepped portion is arranged on the other side of the protrusion relative to the guiding inclined surface. The arrangement of the stepped portion is beneficial to the disassembly of the magnet. The height of the stepped portion is smaller than the height of the guiding plane. Preferably, the height range of the stepped portion relative to the inner wall of the fixing section of the cylinder body is 1-3 mm, and the width range is 3-6 mm.

[0022] Further, the insertion end includes a first fixing hole, and the tail end includes a second fixing hole, which is beneficial to the assembly and positioning of the rotor steel cylinder.

[0023] The present utility model also discloses a permanent magnet electric drum, which comprises a rotor steel cylinder, a plurality of magnets fixed in the rotor steel cylinder, and a stator core inserted into the rotor steel cylinder. The rotor steel cylinder is the above-mentioned rotor steel cylinder, and the yield rate of the permanent magnet electric drum is better and the quality is better.

[0024] The following, please refer to Figures 1 to 2 , and describe the rotor steel cylinder 100 of the present utility model by way of example.

[0025] Please refer to Figure 1 and Figure 2, the present utility model discloses a rotor drum 100, which comprises a cylindrical body. The cylindrical body includes an insertion end 1 for inserting into a stator core (not shown), a tail end 2 opposite to the insertion end 1, and a barrel body 3 located between the insertion end 1 and the tail end 2. The inner side of the barrel body 3 includes an assembly section 31 adjacent to the insertion end 1 and a fixing section 32 adjacent to the tail end and for fixing the permanent magnet 200. The assembly section 31 is provided with a protrusion 33 arranged along the circumference of the barrel body 3 adjacent to the fixing section 32. The inner diameter d1 of the protrusion 33 is less than the inner diameter d2 of the barrel body 3 after the permanent magnet 200 is fixed and greater than the outer diameter of the stator core. The protrusion 33 includes a guiding inclined surface 331 facing the insertion end 1. The setting of the protrusion 33 enables the stator core to be inserted into the barrel body 3 from the insertion end 1. Through the guidance and limitation of the guiding inclined surface 331, it can avoid the difficult assembly caused by the stator core leaning to one side due to the suction force of the permanent magnet 200, and plays a protective role for the permanent magnet 200, improving the assembly efficiency and product quality.

[0026] In a specific embodiment, the inclination angle of the guiding inclined surface 331 is 28°. The difference between the inner diameter d1 of the protrusion 33 and the inner diameter d2 of the barrel body 1 after the permanent magnet 200 is fixed is 2 mm. The difference between the inner diameter d1 of the protrusion 33 and the outer diameter of the stator core is 2 mm. The height of the protrusion 33 relative to the inner wall 321 of the fixing section 32 of the barrel body is 10 mm, having a good guiding effect. The protrusion 33 further includes a guiding plane 332 connecting the guiding inclined surface 331. The guiding plane 332 is parallel to the inner wall 321 of the barrel body located in the fixing section 32. The width range of the guiding plane 332 along the axial direction of the barrel body is 10 mm. The protrusion 33 further includes a step portion 333 for limiting the permanent magnet 200. The step portion 333 is arranged adjacent to the permanent magnet 200. The step portion 333 is arranged on the other side of the protrusion 33 relative to the guiding inclined surface 331. The setting of the step portion 333 is beneficial to the disassembly of the permanent magnet 200. The height of the step portion 333 relative to the inner wall 321 of the fixing section 32 is 2 mm, and the width is 2 mm. The insertion end 1 includes a first fixing hole 11, and the tail end 2 includes a second fixing hole 21, which is beneficial to the assembly and positioning of the rotor steel drum 100.

[0027] It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0028] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present utility model, and they are not used to limit the protection scope of the present utility model. Any equivalent embodiments or modifications made without departing from the technical spirit of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A rotor steel cylinder, comprising a cylindrical body, characterized in that: The cylindrical body includes an insertion end for inserting the stator core, a tail end opposite to the insertion end, and a cylinder located between the insertion end and the tail end. The inner side of the cylinder includes an assembly section adjacent to the insertion end and a fixing section adjacent to the tail end and used to fix the magnetic steel. The assembly section is adjacent to the fixing section and is provided with a protrusion arranged along the circumference of the cylinder. The inner diameter of the protrusion is smaller than the inner diameter of the magnetic steel in the cylinder after being fixed and larger than the outer diameter of the stator core. The protrusion includes a guiding slope toward the insertion end.

2. The rotor steel cylinder according to claim 1, characterized in that: The inclination angle of the guiding slope ranges from 26° to 29°.

3. The rotor steel cylinder according to claim 1, characterized in that: The difference between the inner diameter of the protrusion and the inner diameter of the magnetic steel in the cylinder after being fixed is 1-3 mm, and the difference between the inner diameter of the protrusion and the outer diameter of the stator core is 1-3 mm.

4. The rotor steel cylinder according to claim 1, characterized in that: The height of the protrusion relative to the inner wall of the cylinder located at the fixed section ranges from 8 to 12 mm.

5. The rotor steel cylinder according to claim 1, characterized in that: The protrusion further includes a guide plane connected to the guide slope, and the guide plane is parallel to the inner wall of the cylinder and located at the fixed section.

6. The rotor steel cylinder according to claim 5, characterized in that: The width of the guide plane along the axial direction of the cylinder is in the range of 8-12 mm.

7. The rotor steel cylinder according to claim 1, characterized in that: The protrusion also includes a step portion for limiting the magnetic steel, and the step portion is arranged on the other side of the protrusion relative to the guiding inclined surface.

8. The rotor steel cylinder according to claim 7, characterized in that: The height of the step portion relative to the inner wall of the cylinder is in the range of 1-3 mm, and the width is in the range of 3-6 mm.

9. The rotor steel cylinder according to claim 1, characterized in that: The insertion end includes a first fixing hole, and the tail end includes a second fixing hole.

10. A permanent magnet electric drum, comprising a rotor steel drum, a plurality of magnetic steels fixed in the rotor steel drum, and a stator core inserted into the rotor steel drum, characterized in that: The rotor steel cylinder is the rotor steel cylinder according to any one of claims 1 to 9.

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