Disc motor rotor

Abstract

The present invention relates to the field of motor technology, and in particular to a disc-type motor rotor, comprising: a rotor bracket, the rotor bracket comprising a bracket body, the bracket body is a circular plate-shaped structure, a shaft hole is opened in the center, a plurality of sink grooves are opened correspondingly on the upper and lower end surfaces of the bracket body, the plurality of sink grooves are arranged along the circumferential direction of the bracket body, the sink grooves are opened along the axial direction of the bracket body, the sink grooves extend to the outer edge of the bracket body, an opening is formed at the outer edge of the bracket body, and the sink grooves are dovetail grooves; a plurality of magnets, the magnets and the sink grooves are matched in shape, and the magnets are plugged into the corresponding sink grooves from the openings; an annular clamp, the annular clamp is fixedly sleeved on the outer periphery of the rotor bracket, a first extension plate and a second extension plate are respectively arranged around the outer edges of the upper and lower end surfaces of the annular clamp, the upper end surface of the first extension plate is provided with a first fan blade, and the lower end surface of the second extension plate is provided with a second fan blade. The disc-type motor rotor of the present invention is convenient and quick to install, the magnets are not easy to fall off, and the heat dissipation effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a disc-type motor rotor. Background Art

[0002] 1. Most traditional disc permanent magnet motor rotors use a label-type structure and screw fastening to fix the magnets. The magnets of the former structure are bonded to the rotor forehead with special glue, and the layout position accuracy is not high. Under working conditions, the rotor heating temperature and high-speed rotation of the rotor cause the magnets to be in danger of falling off; the latter requires drilling holes in the magnets, which will affect the performance of the magnets, and the magnets are prone to brittle collapse and cracking when under pressure due to their high hardness.

[0003] Patent number CN102624114A is a disc motor rotor. This invention patent discloses a disc motor rotor used in a permanent magnet disc motor with axial magnetic flux, including a disc-shaped rotor bracket and a plurality of magnets arranged on the rotor bracket; the outer ring of at least one end face of the rotor bracket is provided with an annular outer convex rib, and the inner ring of the end face is provided with an annular inner convex rib, and an annular dovetail groove is formed between the inner convex rib and the outer convex rib; the magnet is fan-shaped, and the radial cross-section of the magnet is a dovetail shape that matches the above-mentioned dovetail groove, so that the magnet is arranged in an annular manner in the dovetail groove; the inner convex rib is provided with a plurality of installation notches for the magnet to enter the dovetail groove, and the installation notches are closed by a pressing block placed therein. This magnetic steel installation method and processing are relatively complicated, and it is not easy to accurately install the magnet in place.

[0004] Furthermore, conventional rotor brackets are made of non-magnetic materials, which are costly and require complex manufacturing processes.

[0005] 2. When the rotor of a traditional disc permanent magnet motor is in operation, the high-speed rotation of the rotor causes the rotor temperature to be too high. The rotor runs in a high-temperature environment for a long time, which greatly reduces the service life of the device. In addition, light and thin objects are easily adsorbed onto the rotor magnet when the rotor is rotating, thereby affecting the performance of the magnet. Summary of the invention

[0006] The technical problem to be solved by the present invention is to solve the problems that the magnetic steel of the label-type disc motor rotor in the prior art is easy to fall off when rotating, the screw-fastened motor rotor affects the performance of the magnetic steel due to the fixing of the magnetic steel opening, and the high-speed rotation of the disc motor rotor in the prior art causes the temperature to be too high, affecting its service life, and light and fine objects are easily adsorbed on the magnetic steel during the rotation process, thereby affecting the performance of the magnetic steel. The present invention provides a disc motor rotor, which is easy to install, has a simple manufacturing process, is not easy to fall off during the high-speed rotation of the rotor, and can quickly cool down during the high-speed rotation process to prevent light and fine objects from being adsorbed on the magnetic steel.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a disc-type motor rotor, comprising: a rotor bracket, the rotor bracket comprising a bracket body, the bracket body is a circular plate-shaped structure, an axial hole is opened at the center of the bracket body, a plurality of sink grooves are correspondingly opened on the upper and lower end faces of the bracket body, and the sink grooves on each end face are arranged along the circumferential direction of the bracket body, the sink grooves are opened along the axial direction of the bracket body, and the sink grooves extend along the radial direction of the bracket body to the outer edge of the bracket body, and the sink grooves extend to the outer edge of the bracket body to form an opening at the outer edge of the bracket body after extending to the outer edge of the bracket body, and the sink grooves are dovetail grooves;

[0008] A plurality of magnetic steels, each of which corresponds to the sink grooves one by one, and each of which is adapted to the shape of the sink grooves, and each of which is inserted from the opening into the corresponding sink groove;

[0009] An annular clamp, wherein the annular clamp is fixedly sleeved on the outer periphery of the rotor bracket, and a first extension plate and a second extension plate are respectively provided along the outer edges of the upper and lower end surfaces of the annular clamp, and the first extension plate and the second extension plate are arranged around the outer periphery of the annular clamp, and a first fan blade is provided on the upper end surface of the first extension plate, and the first fan blade is arranged along the radial direction of the first extension plate, and the first fan blade is arranged along the circumferential direction of the first extension plate, and a second fan blade is provided on the lower end surface of the second extension plate, and the second fan blade is arranged along the radial direction of the second extension plate, and the second fan blade is arranged along the circumferential direction of the second extension plate.

[0010] Preferably, the radial cross-section of the sink groove along the bracket body is in the shape of a sector ring, and the upper end surface area of ​​the sink groove is smaller than the bottom end surface area.

[0011] Furthermore, the magnetic steel is plate-shaped, the surface of the magnetic steel in contact with the bottom of the sink is the lower end surface, the left and right side surfaces of the magnetic steel are inclined surfaces, and the area of ​​the upper end surface of the magnetic steel is smaller than the area of ​​its bottom end surface.

[0012] In order to facilitate installation and use, the end surface of the bracket body includes an inner ring area and an outer ring area, the outer ring area surrounds the inner ring area, the outer ring area is connected to the inner ring area, and the sink groove is opened in the outer ring area.

[0013] In order to facilitate the circulation of longitudinal airflow, the first fan blade extends out of the outer edge of the first extension plate, and the second fan blade extends out of the outer edge of the second extension plate.

[0014] Preferably, the direction from the shaft hole to the outer periphery of the rotor bracket is set from inside to outside, the height of the inner side wall of the first blade is lower than the height of its outer side wall, the inner side of the first blade is inclined toward the outer side, the height of the inner side wall of the second blade is lower than the height of its outer side wall, and the inner side of the second blade is inclined toward the outer side. While reducing the area occupied by the blades, the weight of the rotor bracket is further reduced, and the air volume can be maintained unchanged on the original basis.

[0015] In order to reduce the weight of the rotor bracket, a plurality of through holes are evenly distributed along the circumference of the inner ring area.

[0016] Preferably, the annular clamp is interference fit with the outer edge of the rotor bracket.

[0017] In order to further fix the magnetic steel, the contact surfaces of the rotor bracket and the magnetic steel are coated with adhesive.

[0018] The polarity of the magnets on the same end face is staggered, and the polarity of the two corresponding magnets on the two end faces is opposite. The double-layer installation method of the magnets can choose a single-layer or double-layer connection method according to needs. When a double-layer connection is used, the production efficiency of the motor is effectively improved.

[0019] The rotor bracket is made of magnetic conductive material. The use of magnetic conductive material to make the rotor bracket is low-cost and can be made efficiently, quickly and conveniently.

[0020] The beneficial effects of the present invention are as follows:

[0021] Compared with the prior art, the present invention has an accurate, simple and reliable magnetic steel installation position, which not only takes into account the installation advantages of the label-type motor rotor, but also ensures the integrity and good mechanical properties of the magnetic steel. In addition, while solving the heat dissipation of the motor, it also shields the radial magnetic field of the rotor, preventing thin objects from being easily adsorbed on the magnetic steel, and expanding the use environment of the motor. This solution not only improves the production efficiency of the motor, but also greatly improves the performance and efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 is a schematic diagram of a disc motor rotor of the present invention;

[0024] Figure 2 yes Figure 1 AA cross-sectional diagram and airflow divergence diagram;

[0025] Figure 3 yes Figure 1 The PP cross-sectional diagram is a schematic diagram of the double-layer dovetail sink of the rotor bracket;

[0026] Figure 4 It is a schematic diagram of a fan-shaped ring of magnetic steel of a disc-type motor rotor of the present invention;

[0027] Figure 5 It is a schematic diagram of the arrangement of the magnetic steel polarity end faces of the disc motor rotor of the present invention;

[0028] Figure 6It is a schematic diagram of the polar arrangement of the double-layer magnetic steel of the disc motor rotor of the present invention.

[0029] Reference numerals:

[0030] 1. rotor bracket, 11. bracket body, 12. sink, 121. opening, 13. inner ring area, 14. outer ring area, 15. through hole, 2. magnetic steel, 3. annular clamp, 31. first extension plate, 32. second extension plate, 33. first fan blade, 34. second fan blade. DETAILED DESCRIPTION

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0032] like Figures 1 to 6 As shown, it is the best embodiment of the present invention, a disc motor rotor, comprising:

[0033] The rotor bracket 1 includes a bracket body 11, which is a disc-shaped structure. An axial hole is provided at the center of the bracket body 11. A plurality of sink grooves 12 are provided on the upper and lower end surfaces of the bracket body 11. The end surface of the bracket body 11 includes an inner ring area 13 and an outer ring area 14. The outer ring area 14 surrounds the inner ring area 13. The outer ring area 14 is connected to the inner ring area 13. The sink grooves 12 are provided in the outer ring area 14. The inner ring area 13 is provided with a plurality of through holes 15 evenly distributed along its circumference.

[0034] The grooves 12 on each end face are arranged along the circumference of the bracket body 11, the grooves 12 are opened along the axial direction of the bracket body 11, and the grooves 12 extend along the radial direction of the bracket body 11 to the outer edge of the bracket body 11. After the grooves 12 extend to the outer edge of the bracket body 11, an opening 121 is formed at the outer edge of the bracket body 11. The grooves 12 are dovetail grooves; the radial cross-sectional shape of the grooves 12 along the bracket body 11 is a fan ring, and the upper end surface area of ​​the grooves 12 is smaller than the bottom end surface area. The rotor bracket 1 is made of magnetic conductive material.

[0035] There are multiple magnetic steels 2, each of which corresponds to the sink 12 one by one. The shapes of the magnetic steels 2 and the sink 12 are adapted to each other. The magnetic steels 2 are inserted into the corresponding sink 12 from the opening 121, and the contact surfaces of the rotor bracket 1 and the magnetic steels 2 are coated with adhesive. Figure 4 The magnetic steel 2 is plate-shaped, the surface of the magnetic steel 2 in contact with the bottom of the sink 12 is the lower end surface, the left and right side surfaces of the magnetic steel 2 are inclined surfaces, and the upper end surface area of ​​the magnetic steel 2 is smaller than the bottom end surface area.

[0036] The annular clamp 3 is fixedly sleeved on the outer periphery of the rotor bracket 1 , and the annular clamp 3 and the outer edge of the rotor bracket 1 are interference fit.

[0037] A first extension plate 31 and a second extension plate 32 are respectively provided along the outer edges of the upper and lower end surfaces of the annular clamp 3, and the first extension plate 31 and the second extension plate 32 are arranged around the outer periphery of the annular clamp 3, and a first fan blade 33 is provided on the upper end surface of the first extension plate 31, and the first fan blade 33 is arranged along the radial direction of the first extension plate 31, and the first fan blade 33 is arranged along the circumferential direction of the first extension plate 31, and a second fan blade 34 is provided on the lower end surface of the second extension plate 32, and the second fan blade 34 is arranged along the radial direction of the second extension plate 32, and the second fan blade 34 is arranged along the circumferential direction of the second extension plate 32.

[0038] The first blades 33 extend out of the outer edge of the first extension plate 31 , and the second blades 34 extend out of the outer edge of the second extension plate 32 .

[0039] The direction from the shaft hole to the periphery of the rotor bracket 1 is set to be from inside to outside, the height of the inner wall of the first blade 33 is lower than the height of its outer wall, the inner side of the first blade 33 is inclined toward its outer side, the height of the inner wall of the second blade 34 is lower than the height of its outer wall, and the inner side of the second blade 33 is inclined toward its outer side.

[0040] like Figure 5 and Figure 6 As shown, the polarities of the magnetic steels 2 on the same end surface are staggered, and the polarities of the two corresponding magnetic steels 2 on the two end surfaces are opposite.

[0041] The present application provides a dovetail groove on the rotor bracket 1, and the upper opening of the dovetail groove is set on the end surface of the rotor bracket 1. Since the upper opening area of ​​the dovetail groove is smaller than the bottom area of ​​the dovetail groove, the magnet 2 cannot fall in the axial direction during high-speed rotation. In the radial direction, the magnet 2 is fixed by an annular clamp 3 to prevent the magnet 2 from falling toward its periphery. The magnet 2 is fixed in the axial and radial directions at the same time to prevent the magnet 2 from falling off.

[0042] In the present application, the magnet 2 is matched one by one with the dovetail slot, and the magnet 2 is inserted into the corresponding dovetail slot through the opening 121 formed at the outer edge of the rotor bracket 1, and the installation method is simple. CN102624114A mentioned in the background technology is a disc motor rotor. Since the magnets are screwed into the rotor bracket one by one, the installation time of each magnet is about 10S. The magnet 2 of the present application is installed into the rotor bracket 1 by plugging, and the installation is convenient and quick. The installation time of each magnet 2 is 2S. In order to facilitate installation in the above case, each magnet needs to be designed to be small and easy to rotate into the rotor bracket. It takes longer to install the same number of poles. Therefore, the overall installation cycle of the magnet 2 of the present application is at least 5 times faster than the overall installation cycle of the magnet in the above case.

[0043] like Figure 2As shown, the outer periphery of the annular clamp 3 of the present application is provided with an extension plate and the extension plate is provided with fan blades. When the rotor is rotating at high speed, the fan blades on the annular clamp 3 generate an annular airflow R along the circumference of the rotor bracket 1. Since the fan blades are divided into upper and lower layers, and the fan blades of each layer are arranged at intervals from each other, gaps are formed between adjacent fan blades, and longitudinal rotating airflow S is also generated on the surface perpendicular to the circumferential surface. The plane where the longitudinal rotating airflow S is located is perpendicular to the plane where the above-mentioned circumferential airflow R is located. The longitudinal rotating airflow S and the circumferential airflow R intersect with each other, and the circumferential airflow R dissipates the heat generated by the stator winding to the periphery, and the longitudinal rotating airflow S further dissipates the circumferential airflow R longitudinally. Therefore, the heat generated by the stator winding can be quickly discharged, so that the stator winding can be quickly cooled.

[0044] The rotor bracket 1 of the present application is integrally formed using magnetic conductive materials. The prior art requires 6 hours to manufacture the bracket and requires auxiliary tooling. The bracket of the present invention requires 2 hours to manufacture and does not require auxiliary tooling. Moreover, the cost is low. The material cost of the existing rotor bracket 1 is 1 yuan per piece, while the material cost of the rotor bracket 1 of the present invention is 0.65 yuan per piece. It can be seen that the production cycle of the rotor bracket 1 of the present application is greatly shortened, and the material cost is reduced by 35%, which greatly reduces the time, money, manpower and material costs for the entire production line or the entire factory.

[0045] In general, compared with the prior art, the present invention has an accurate, simple and reliable installation position of the magnetic steel 2, which not only takes into account the installation advantages of the label-type motor rotor, but also ensures the integrity and good mechanical properties of the magnetic steel 2. Moreover, while solving the heat dissipation of the motor, the radial magnetic field of the rotor is shielded, preventing thin objects from being easily adsorbed on the magnetic steel 2, and expanding the use environment of the motor. This solution not only improves the production efficiency of the motor, but also greatly improves the performance and efficiency of the motor.

[0046] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A disc motor rotor, characterized in that: include: A rotor bracket (1), the rotor bracket (1) comprising a bracket body (11), the bracket body being a circular plate-shaped structure, an axial hole being provided at the center of the bracket body, a plurality of recessed grooves (12) being provided on upper and lower end surfaces of the bracket body, and the recessed grooves on each end surface are arranged along the circumference of the bracket body, the recessed grooves are provided along the axial direction of the bracket body, and the recessed grooves extend along the radial direction of the bracket body to the outer edge of the bracket body, and after the recessed grooves extend to the outer edge of the bracket body, an opening (121) is formed at the outer edge of the bracket body, and the recessed grooves are dovetail grooves; a plurality of magnetic steels (2), the magnetic steels (2) corresponding one to the sink grooves, the shapes of the magnetic steels (2) and the sink grooves being adapted, and the magnetic steels (2) being inserted into the corresponding sink grooves from the openings (121); an annular clamp (3), the annular clamp (3) being fixedly sleeved on the outer periphery of the rotor bracket (1), a first extension plate (31) and a second extension plate (32) being respectively provided along the outer edges of the upper and lower end surfaces of the annular clamp (3), and the first extension plate (31) and the second extension plate (32) being arranged around the outer periphery of the annular clamp (3), the upper end surface of the first extension plate (31) being provided with a first fan blade (33), the first fan blade (33) being arranged along the radial direction of the first extension plate (31), and the first fan blade (33) being arranged along the circumferential direction of the first extension plate (31), and the lower end surface of the second extension plate (32) being provided with a second fan blade (34), the second fan blade (34) being arranged along the radial direction of the second extension plate (32), and the second fan blade (34) being arranged along the circumferential direction of the second extension plate (32); The radial cross-section of the sink groove along the bracket body is in the shape of a fan ring, the upper end surface area of ​​the sink groove is smaller than the bottom end surface area, the magnetic steel (2) is in the shape of a plate, the surface of the magnetic steel (2) in contact with the bottom of the sink groove is the lower end surface, the left and right side surfaces of the magnetic steel (2) are inclined surfaces, the upper end surface area of ​​the magnetic steel (2) is smaller than the bottom end surface area, the end surface of the bracket body includes an inner ring area (13) and an outer ring area (14), the outer ring area surrounds the inner ring area, the outer ring area is connected to the inner ring area, the sink groove is opened in the outer ring area, and the first fan blade (33) extends out of the first extension The outer edge of the plate (31), the second fan blade (34) extends from the outer edge of the second extension plate (32), the direction from the shaft hole to the outer periphery of the rotor bracket (1) is set to be from the inside to the outside, the height of the inner wall of the first fan blade (33) is lower than the height of its outer wall, the inner side of the first fan blade (33) is inclined toward the outside, the height of the inner wall of the second fan blade (34) is lower than the height of its outer wall, the inner side of the second fan blade (34) is inclined toward the outside, the polarity of the magnetic steel (2) on the same end face is staggered, and the polarity of the two corresponding magnetic steels (2) on the two end faces is opposite.

2. The disc motor rotor according to claim 1, characterized in that: The inner ring area (13) has a plurality of through holes (15) evenly distributed along its circumference.

3. The disc motor rotor according to claim 1, characterized in that: The annular clamp (3) is interference fit with the outer edge of the rotor bracket (1).

4. The disc motor rotor according to claim 1, characterized in that: The contact surfaces of the rotor bracket (1) and the magnetic steel (2) are both coated with adhesive.

5. The disc motor rotor according to claim 1, characterized in that: The rotor bracket (1) is made of magnetic conductive material.

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