Permanent magnet outer rotor assembly device for DC outer rotor motor

Abstract

The invention discloses a permanent magnet outer rotor assembly device of a DC outer rotor motor, comprising a hollow shaft, a first outer rotor stretched iron end cover integrally formed with a bearing chamber, an outer rotor cylinder and a reverse edge of the cylinder, a plurality of through holes evenly arranged on the reverse edge of the cylinder, a permanent magnet built in the outer rotor cylinder, a second outer rotor stretched iron end cover integrally formed with a bearing chamber, a protrusion and a plurality of matching through holes, an outer end surface of the protrusion of the second outer rotor stretched iron end cover is inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation, replacing the prior art method in which a die-cast aluminum end cover is formed with a stopper and inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation, saving the material cost and die-casting process cost of the die-cast aluminum end cover, eliminating the high energy consumption and waste gas emission pollution of die-cast aluminum production, and using a cold stamping process to greatly improve the production efficiency compared with a high-temperature die-casting process, further reducing the cost, forming a permanent magnet outer rotor assembly device of a DC outer rotor motor with high production efficiency, low cost, energy saving and environmental protection.

Description

Technical Field

[0001] The invention relates to an outer rotor motor, in particular to a permanent magnet outer rotor assembly device of a DC outer rotor motor. Background Art

[0002] The DC outer rotor motor has the advantages of high electromechanical efficiency, power saving, large torque, high speed, and small space occupation. The outer rotor motor of the prior art Chinese patent application No. 202410816659.8 shows a DC outer rotor motor permanent magnet outer rotor assembly device, including a hollow shaft, an outer rotor stretched iron end cover at one end of the hollow shaft is integrated with a bearing chamber, an outer rotor cylinder and a cylinder reverse edge, and the cylinder reverse edge is evenly arranged with a number of through holes, and the outer rotor cylinder is built with a permanent magnet, and the outer rotor die-cast metal end cover at the other end of the hollow shaft is integrated with a bearing chamber, a stop , ears and several adapting through holes, the stop of the outer rotor die-cast metal end cover is inserted into the inner wall of the outer rotor cylinder of the outer rotor stretched iron end cover to form a radially tight set, the screw passes through the adapting through hole of the outer rotor die-cast metal end cover and the through hole on the reverse side of the cylinder, and the nut is screwed in to cause the reverse side of the outer rotor stretched iron end cover cylinder and the outer rotor die-cast metal end cover to be axially tight and fixed, replacing the cumbersome production method of the prior art in which multiple screws must be used for composite connection between two parts of different materials, the die-cast aluminum end cover at one end of the hollow shaft and the (iron) outer rotor cylinder, which saves the material cost of a die-cast aluminum end cover. The cost of the related production process is reduced, and on the other hand, the materials and working hours required for the connection processes such as screwing, punching screw holes, and punching through holes required for the connection process of the two components are eliminated. In this way, it is easy to install and reduces the production cost. At the same time, due to the use of the seamless integrated structure of the outer rotor stretched iron end cover integrated with the bearing chamber, the outer rotor cylinder and the reverse edge of the cylinder, the gap connection structure between the two different material components of the die-cast aluminum end cover and the (iron) outer rotor cylinder in the prior art is eliminated, which greatly improves the overall anti-corrosion of the permanent magnet outer rotor assembly. The invention relates to a permanent magnet outer rotor assembly device for a DC outer rotor motor, which is easy to install, has low production cost, is energy-saving and has good moisture-proof performance. However, since the outer rotor die-cast metal end cover at the other end of the hollow shaft and its integrated bearing chamber, stopper, hanging ear and several adapter through holes are still used in production, the die-cast aluminum production process is still used, and there are still problems such as high material cost of the die-cast aluminum end cover and high die-casting process cost, low production efficiency, high energy consumption and high-temperature smelting waste gas emission polluting the environment, which need to be improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a permanent magnet outer rotor assembly device for a DC outer rotor motor which can be applied to a DC outer rotor motor, is easy to install, has high production efficiency, low cost, is energy-saving and environmentally friendly, and has good moisture-proof performance.

[0004] In order to solve the above technical problems, the permanent magnet outer rotor assembly device of the DC outer rotor motor of the present invention comprises a hollow shaft, an outer rotor cylinder, a permanent magnet is built in the outer rotor cylinder, an outer rotor end cover, the outer rotor end cover is formed with a bearing chamber, a bearing is built in the bearing chamber, a stator is arranged in the middle section of the hollow shaft, the bearings passing through the bearing chambers at both ends of the outer rotor end cover at both ends of the hollow shaft are concentrically installed, and the hollow shaft body passing through the outer rotor end cover is fixedly equipped with a frame, the above outer rotor end cover comprises a first outer rotor stretched iron end cover, the first outer rotor stretched iron end cover is integrated with a bearing chamber, an outer rotor cylinder and the reverse side of the cylinder, and a plurality of through holes are evenly arranged on the reverse side of the cylinder, the outer rotor end cover includes a second outer rotor stretched iron end cover, and the second outer rotor stretched iron end cover is integrally formed with a bearing chamber, a convex block and a plurality of adapting through holes, the outer end surface of the convex block of the second outer rotor stretched iron end cover is inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation, the screw passes through the second outer rotor stretched iron end cover adapting through hole and the reverse side through hole of the cylinder, and the nut is screwed in so that the reverse side of the cylinder of the first outer rotor stretched iron end cover and the second outer rotor stretched iron end cover are axially tight and fixed.

[0005] The second outer rotor stretched iron end cover is integrally formed with a bearing chamber, a convex block and a plurality of matching through holes, and the outer end surface of the convex block of the second outer rotor stretched iron end cover is inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation method, which replaces the existing die-cast aluminum end cover having a stopper inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation method, which not only saves the material cost and die-casting process cost of the die-cast aluminum end cover, but also eliminates the high energy consumption and exhaust gas emission pollution of die-cast aluminum production, and the cold stamping process greatly improves the production efficiency compared with the high-temperature die-casting process, further reducing the cost, thereby forming a permanent magnet outer rotor assembly device of a DC outer rotor motor with high production efficiency, low cost, energy saving and environmental protection, and good moisture-proof performance.

[0006] As a technical solution for the protrusion of the second outer rotor stretched iron end cover, the protrusion of the second outer rotor stretched iron end cover is a circle of circumferential annular protrusions, and the outer end surface of the circumferential annular protrusion is inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially fixed installation.

[0007] As another technical solution for the protrusion of the second outer rotor stretched iron end cover, the protrusion of the second outer rotor stretched iron end cover is a plurality of evenly distributed arc-shaped protrusions, and the outer end surface of the arc-shaped protrusion is inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to be radially fixed.

[0008] As another technical solution for the protrusion of the second outer rotor stretched iron end cover, the protrusion of the second outer rotor stretched iron end cover is a plurality of evenly distributed circular protrusions, and the outer end surface of the circular protrusion is inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially fixed installation.

[0009] It can be understood that the above three methods of inserting the outer end surface of the second outer rotor stretched iron end cover protrusion into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation can all achieve the effect of inserting the outer end surface of the second outer rotor stretched iron end cover protrusion into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation, and can all achieve the effect of saving the material and die-casting process costs of the die-cast aluminum end cover, eradicating the high energy consumption and waste gas emission pollution caused by die-cast aluminum, and having good moisture-proof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0011] Figure 1 It is a longitudinal sectional view of an embodiment of a permanent magnet outer rotor assembly device of a DC outer rotor motor of the present invention;

[0012] Figure 2 for Figure 1 An exploded view of an embodiment;

[0013] Figure 3 for Figure 1 External view of the embodiment;

[0014] Figure 4 An exploded view of another embodiment of a permanent magnet outer rotor assembly device of a DC outer rotor motor of the present invention;

[0015] Figure 5 An exploded view of another embodiment of the permanent magnet outer rotor assembly device of a DC outer rotor motor of the present invention;

[0016] Description of labels:

[0017] 1. Hollow shaft; 2. Outer rotor cylinder; 3. Permanent magnet; 401. First outer rotor stretched iron end cover; 402. Second outer rotor stretched iron end cover; 5. Bearing chamber; 6. Bearing; 7. Stator; 8. Frame; 9. Reverse edge of cylinder; 10 Through hole; 111. Circumferential annular protrusion; 112. Arc-shaped protrusion; 113. Circular protrusion; 12. Adaptive through hole; 13. Screw; 14. Nut; DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0019] See also Figures 1 to 3An embodiment of a permanent magnet outer rotor assembly device of a DC outer rotor motor of the present invention comprises a hollow shaft (1), a first outer rotor stretched iron end cover (401), a second outer rotor stretched iron end cover (401) integrally formed with a bearing chamber (5), an outer rotor cylinder (2) and a cylinder reverse edge (9), a plurality of through holes (10) evenly arranged on the cylinder reverse edge (9), a second outer rotor stretched iron end cover (402), the second outer rotor stretched iron end cover (402) integrally formed with a bearing chamber (5), a circumferential annular protrusion (111) and a plurality of matching through holes (12), a bearing (6) is built in the bearing chamber (5), a stator (7) is arranged in the middle section of the hollow shaft (1), and both ends of the hollow shaft (1) respectively pass through the first outer rotor stretched iron end cover (401) shaft The bearing chamber (5) bearing (6) and the second outer rotor stretched iron end cover (402) bearing chamber (5) bearing (6) are installed concentrically, the hollow shaft (1) body passing through the second outer rotor stretched iron end cover (402) is fixedly mounted on the frame (8), the outer end surface of the circumferential annular protrusion (111) of the second outer rotor stretched iron end cover (402) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to be radially fixed, the screw (13) passes through the second outer rotor stretched iron end cover (402) matching through hole (12) and the through hole (10) of the reverse side (9) of the cylinder, and the nut (14) is screwed in so that the reverse side (9) of the cylinder of the first outer rotor stretched iron end cover (401) and the second outer rotor stretched iron end cover (402) are axially fixed.

[0020] By adopting a method in which a bearing chamber (5), a circumferential annular projection (111) and a plurality of matching through holes (12) are integrally formed on the second outer rotor stretched iron end cover (402), and the outer end surface of the circumferential annular projection (111) of the second outer rotor stretched iron end cover (402) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to form a radially tight and fixed installation, the method replaces the method in the prior art in which the die-cast aluminum end cover is provided with a stopper and inserted into the inner wall of the outer rotor cylinder of the first outer rotor stretched iron end cover to form a radially tight and fixed installation, thereby saving the material cost and die-casting process cost of the die-cast aluminum end cover, and eliminating the high energy consumption and waste gas emission pollution generated in the die-cast aluminum production process. In addition, the cold stamping process is adopted to greatly improve the production efficiency compared with the high-temperature die-casting process, and the cost is further reduced, thereby forming a permanent magnet outer rotor assembly device of a DC outer rotor motor with high production efficiency, low cost, energy saving, environmental protection and good moisture-proof performance.

[0021] See also Figure 4Another embodiment of the permanent magnet outer rotor assembly device of the DC outer rotor motor of the present invention is another technical solution for the protrusion of the second outer rotor stretched iron end cover (402). The protrusion of the second outer rotor stretched iron end cover (402) is six evenly distributed arc-shaped protrusions (112). The outer end surface of the arc-shaped protrusion (112) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to form a radially tight and fixed installation. The outer end surface of the arc-shaped protrusion (112) of the second outer rotor stretched iron end cover (402) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to form a radially tight and fixed installation. The material and die-casting process costs of the die-cast aluminum end cover can be saved, and the high energy consumption and waste gas emission pollution caused by die-cast aluminum are eliminated, and the moisture-proof performance is good.

[0022] See also Figure 5 Another embodiment of the permanent magnet outer rotor assembly device of the DC outer rotor motor of the present invention is another technical solution for the protrusion of the second outer rotor stretched iron end cover (402). The protrusion of the second outer rotor stretched iron end cover (402) is eight evenly distributed circular protrusions (113). The outer end surface of the circular protrusion (113) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to form a radially tight and fixed installation. The outer end surface of the protrusion (113) of the second outer rotor stretched iron end cover (402) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to form a radially tight and fixed installation. The material and die-casting process costs of the die-cast aluminum end cover can be saved, and the high energy consumption and waste gas emission pollution caused by die-cast aluminum are eliminated, and the moisture-proof performance is good.

[0023] It can be understood that the protrusions of the second outer rotor stretched iron end cover (402) in the present invention are not limited to the specific shape and number of the protrusions in the above-mentioned embodiment, and other shapes and numbers can also be used. The replacement changes of the local morphology of the protrusions of the stretched protrusion-outer rotor cylinder inner wall device in this radial fastening and fixing technical solution all fall within the protection scope of the present invention.

Claims

1. A permanent magnet outer rotor assembly device of a DC outer rotor motor, comprising a hollow shaft (1), an outer rotor cylinder (2), the outer rotor cylinder (2) having a permanent magnet (3) built therein, an outer rotor end cover, the outer rotor end cover having a bearing chamber (5), the bearing chamber (5) having a bearing (6) built therein, a stator (7) being arranged in the middle section of the hollow shaft (1), the bearings (6) passing through the bearing chambers (5) at both ends of the hollow shaft (1) being concentrically installed, the hollow shaft (1) body passing through the outer rotor end cover is fixedly mounted with a frame (8), the outer rotor end cover comprising a first outer rotor stretched iron end cover (401), the first outer rotor stretched iron end cover (401) being integrally formed with the bearing chamber (5), the outer rotor cylinder (2) and the cylinder reverse edge (9), a plurality of through holes (10) being evenly arranged on the cylinder reverse edge (9), characterized in that: The outer rotor end cover comprises a second outer rotor stretched iron end cover (402), on which a bearing chamber (5), a protrusion and a plurality of matching through holes (12) are integrally formed, the outer end surface of the protrusion of the second outer rotor stretched iron end cover (402) is inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to be radially fixed, the screw (13) passes through the matching through hole (13) of the second outer rotor stretched iron end cover (402) and the through hole (10) on the reverse side (9) of the cylinder, and the nut (14) is screwed in so that the reverse side (9) of the cylinder of the first outer rotor stretched iron end cover (401) and the second outer rotor stretched iron end cover (402) are axially fixed.

2. The permanent magnet outer rotor assembly device of a DC outer rotor motor according to claim 1, characterized in that: The protrusions of the second outer rotor stretched iron end cover (402) are a circle of circumferential annular protrusions (111), and the outer end surfaces of the circumferential annular protrusions (111) are inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to be radially fixed.

3. The permanent magnet outer rotor assembly device of a DC outer rotor motor according to claim 1, characterized in that: The protrusions (11) of the second outer rotor stretched iron end cover (402) are a plurality of evenly distributed arc-shaped protrusions, and the outer end surfaces of the arc-shaped protrusions (112) are inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to be radially fixed.

4. The permanent magnet outer rotor assembly device of a DC outer rotor motor according to claim 1, characterized in that: The protrusions of the second outer rotor stretched iron end cover (402) are a plurality of evenly distributed circular protrusions (113), and the outer end surfaces of the circular protrusions (113) are inserted into the inner wall of the outer rotor cylinder (2) of the first outer rotor stretched iron end cover (401) to be radially fixed.

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