Motor rotor and motor

Abstract

The utility model provides a motor rotor, which comprises a cover body, a side wall and a plurality of annularly arranged magnets, the plurality of magnets are arranged on the inner side of the side wall, each magnet comprises a body, a first bulge and a second bulge, and the first bulge and the second bulge are arranged on two opposite sides of the body; the side wall comprises a first end and a second end which are oppositely arranged, the first end is provided with an extension part, and the extension part accommodates and fixes the first bulge; the cover body is pasted and fixed to the second end and provided with a receding part corresponding to the second protrusion, and the receding part accommodates and fixes the second protrusion. The motor rotor is reliable in structure and convenient to assemble. Meanwhile, the utility model also provides a motor adopting the motor rotor.

Description

[Technical field]

[0001] The utility model relates to the field of motors, in particular to a motor rotor and a motor. [Background technology]

[0002] A motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on a rotor to form a magneto-electrical power rotation torque. The motor in the prior art includes a rotor housing, a plurality of magnets, a stator, and a motor shaft. The energized coil of the stator generates a rotating magnetic field, which acts on the magnets. The magnets are glued to the inner surface of the rotor housing by glue, driving the rotor housing to rotate. The motor shaft is fixed to the rotor housing to output power to the outside.

[0003] However, the magnets are glued to the inner surface of the rotor housing one by one by glue, and assembly is inconvenient. [Contents of the utility model]

[0004] Aiming at the technical problem that the prior art motor uses glue to fix magnets, which causes inconvenience in assembly, the utility model provides a motor rotor and a motor that are easy to assemble.

[0005] A motor rotor comprises a cover body, a side wall and a plurality of magnets arranged in a ring, wherein the plurality of magnets are arranged on the inner side of the side wall, and the magnet comprises a body, a first protrusion and a second protrusion, wherein the first protrusion and the second protrusion are arranged on opposite sides of the body; the side wall comprises a first end and a second end arranged oppositely, wherein the first end is provided with an extension portion, and the extension portion accommodates and fixes the first protrusion; the cover body is glued and fixed to the second end, and a yielding portion corresponding to the second protrusion is provided, and the yielding portion accommodates and fixes the second protrusion.

[0006] A motor comprises a stator, a motor rotor and a motor shaft, wherein the stator generates a changing magnetic field to drive the motor rotor to rotate, the motor shaft is fixed to the motor rotor and rotates synchronously with the motor rotor, the motor rotor comprises a cover body, a side wall and a plurality of magnets arranged in a ring, the plurality of magnets are arranged on the inner side of the side wall, the magnet comprises a body, a first protrusion and a second protrusion, the first protrusion and the second protrusion are arranged on opposite sides of the body; the side wall comprises a first end and a second end arranged oppositely, the first end is provided with an extension portion, the extension portion accommodates and fixes the first protrusion; the cover body is glued and fixed to the second end, a yielding portion corresponding to the second protrusion is provided, the yielding portion accommodates and fixes the second protrusion.

[0007] Compared with the prior art, in the motor rotor provided by the embodiment of the utility model, the first end of the side wall is provided with the extension part to accommodate and fix the first protrusion, and the cover body is provided with the yielding part to accommodate and fix the second protrusion, so that the magnet can be sandwiched between the side wall and the cover body. The cover body is pasted on the second end, so that the magnet can be fixed to the side wall. During assembly, the magnet is installed into the side wall, and the cover body and the side wall are pasted to fix the magnet, which is convenient for assembly.

Brief Description of the Drawings

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0009] Figure 1 A three-dimensional assembly diagram of a motor provided by an embodiment of the utility model;

[0010] Figure 2 A three-dimensional exploded schematic diagram of a motor provided in the first embodiment of the utility model;

[0011] Figure 3 for Figure 2 A cross-sectional view of the motor shown;

[0012] Figure 4A and 4B They are Figure 3 Schematic diagram of other embodiments of the cover, magnet and side wall shown;

[0013] Figure 5A and 5B They are Figure 3 Schematic diagram of other embodiments of the cover, magnet and side wall shown;

[0014] Fig. 6A , 6B , 6C and 6D respectively Figure 3 Schematic diagram of the structure of other embodiments of the cover body, magnet and side wall shown.

[0015] Figure 7 A three-dimensional exploded schematic diagram of a motor provided in the second embodiment of the utility model;

[0016] Figure 8 for Figure 7 A cross-sectional view of the motor shown;

[0017] Fig.9A and 9BThey are Figure 7 Schematic diagram of other embodiments of the cover, magnet and side wall shown;

[0018] Fig. 10A and 10B They are Figure 7 Schematic diagram of other embodiments of the cover, magnet and side wall shown;

[0019] Fig.11A , 11B , 11C and 11D respectively Figure 7 Schematic diagram of other embodiments of the cover, magnet and side wall shown;

[0020] Fig.12 A three-dimensional exploded schematic diagram of a motor provided in a third embodiment of the utility model;

[0021] Fig.13 for Fig.12 A cross-sectional view of the motor shown;

[0022] Fig.14 A three-dimensional exploded schematic diagram of a motor provided in a fourth embodiment of the utility model;

[0023] Fig.15 for Fig.14 A cross-sectional view of the motor is shown. [Specific implementation method]

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 , is a three-dimensional assembly diagram of a motor provided by an embodiment of the utility model, wherein the motor 10 includes a motor rotor, a stator 12 and a motor shaft 13. The stator 12 is energized to generate a changing magnetic field, driving the motor rotor to rotate, and the motor rotor rotates relative to the stator 12. The motor shaft 13 is fixed to the motor rotor, and the two are relatively stationary and rotate synchronously, realizing the power output of the motor shaft 13.

[0026] Please refer to Figure 2 and 3 ,in, Figure 2 for Figure 1 The three-dimensional exploded diagram of the motor shown, Figure 3 for Figure 1The cross-sectional view of the motor shown in FIG. 1 is a diagram showing a stator 12 including a base 121, a bearing assembly 123 and a winding coil 125. The base 121, the bearing assembly 123 and the winding coil 125 are correspondingly accommodated in the motor rotor. The base 121 has a hollow tube structure 1211, and the winding coil 125 is sleeved on the base 121. The hollow tube structure 1211 includes a sleeve portion 12111 and a limit portion 12113 which are arranged in connection with each other. The outer diameter of the sleeve portion 12111 corresponds to the inner diameter of the winding coil 125, and the outer diameter of the limit portion 12113 is larger than the inner diameter of the winding coil 125. The winding coil 125 is sleeved outside the sleeve portion 12111, and the bearing assembly 123 is fixed in the hollow tube structure 1211.

[0027] The motor shaft 13 passes through the motor rotor and is inserted into the hollow tube structure 1211. The bearing assembly 123 is sleeved outside the motor shaft 13 and clamped between the motor shaft 13 and the hollow tube structure 1211. At the same time, the motor shaft 31 is fixed to the motor rotor through a screw locking structure, rotates synchronously with the electronic rotor, and rotates freely relative to the base 121.

[0028] First embodiment

[0029] The present utility model embodiment provides a motor rotor 11, the motor rotor 11 is applied to a motor 10, such as Figure 1 , Figure 2 and Figure 3 As shown, the motor rotor 11 includes a plurality of magnets 111, a side wall 113 and a cover 115. The cover 115 is fixed to one end of the side wall 113. The plurality of magnets 111 are arranged in a ring and disposed on the inner side of the side wall 113, corresponding to the winding coil 125. Specifically, the plurality of magnets 111 are arranged in a Halbach array.

[0030] Each magnet 111 includes a body 1111 , a first protrusion 1113 , and a second protrusion 1115 . The first protrusion 1113 and the second protrusion 1115 are disposed on two opposite sides of the body 1111 .

[0031] The side wall 113 is in a hollow ring shape and includes a first end 1131 and a second end 1133 that are oppositely disposed. The first end 1131 is provided with an extension portion 1137 , and the extension portion 1137 accommodates and fixes the first protrusion 1113 .

[0032] The cover body 115 is in the shape of an annular cover, and together with the side wall 113, it forms a hollow structure with one end open to accommodate the base 121, the bearing assembly 123 and the winding coil 125. The cover body 115 has a through hole 1151, a heat dissipation hole 1153 and a clearance portion. The through hole 1151 is set in the central area of ​​the cover body 115, and the hollow tube structure 1211 is coaxially connected with the through hole 1151. The motor shaft 13 passes through the through hole 1151, is inserted into the hollow tube structure 1211, and is fixed to the cover body 115, so that the motor shaft 13 and the cover body 115 rotate synchronously with each other. The heat dissipation holes 1153 surround the through hole 1151 and are evenly arranged in an array on the cover body 115, so as to facilitate the smooth dissipation of the heat generated during the operation of the motor 10. The clearance portion is set corresponding to the second protrusion 1115, and the second protrusion 1115 is accommodated and fixed. The cover body 115 is fixed in cooperation with the second end 1133 of the side wall 113. The cover body 115 and the second end 1133 are fixed by threads. Specifically, the second end 1133 is provided with a first thread structure 1135, and the side of the cover body 115 facing the side wall 113 is provided with a second thread structure 1155. The first thread structure 1135 and the second thread structure 1155 are fixed in cooperation.

[0033] In this embodiment, the first protrusion 1113 is disposed on the side of the body 1111 away from the cover 115, and is disposed on the edge of the body 1111 close to the side wall 113. The extension portion 1137 includes a first extension portion 11371 and a second extension portion 11373 that are connected to each other. The first extension portion 11371 is formed by extending from the first end 1131 toward the center of the side wall 113, and the second extension portion 11373 is formed by extending from the first extension portion 11371 toward the second end 1133. The first extension portion 11371, the second extension portion 11373 and the first end 1131 form a first groove 1139, and the first protrusion 1113 is received in the first groove 1139.

[0034] The second protrusion 1115 is disposed on the side of the body 1111 facing the cover 115, and is disposed at the edge of the body 1111 close to the side wall 113. The yielding portion is a first anti-step structure 1157, which is disposed on the side of the cover 115 facing the magnet 111, and is disposed at the edge of the cover 115 close to the side wall 113. The first anti-step structure 1157 and the side wall 113 form a second groove 1159, and the second protrusion 1115 is received in the second groove 1159.

[0035] During assembly, the first protrusion 1113 of the magnet 111 is inserted into the first groove 1139, and then the cover body 115 and the side wall 113 are fixedly connected via the first threaded structure 1135 and the second threaded structure 1155. At this time, the first anti-step structure 1157 and the side wall 113 form a second groove 1159 to accommodate and fix the second protrusion 1115, thereby fixing the magnet 111 to the side wall 113.

[0036] It is understandable that, to ensure the fixing effect, the first thread structure 1135 of the side wall 113 extends from the second end 1133 to the first end 1131 , and extends to be substantially flush with or beyond the end of the second protrusion 1115 .

[0037] It can also be understood that the first thread structure 1135 extends from the second end 1133, including the first thread structure 1135 extending from the edge of the second end 1133 of the side wall 113 as a starting point, and also including the first thread structure 1135 extending from a preset distance from the edge of the second end 1133 of the side wall 113 as a starting point.

[0038] For some examples, see Figure 4A and 4B ,for Figure 3 The first protrusion 2113 is disposed on the side of the body 2111 away from the cover 215 and on the edge of the body 2111 close to the side wall 213 .

[0039] The extension portion 2137 includes a first extension portion 21371 and a second extension portion 21373 which are connected to each other. The first extension portion 21371 extends from the first end 2131 toward the center of the side wall 213, and the second extension portion 21373 extends from the first extension portion 21371 toward the second end 2133. The first extension portion 21371, the second extension portion 21373 and the first end 2131 form a first groove 2139, and the first protrusion 2113 is received in the first groove 2139.

[0040] The second protrusion 2115 is disposed on the side of the body 2111 facing the cover 215 and is disposed on the edge of the body 2111 away from the side wall 213. Figure 4A As shown, or, the second protrusion 2115 is disposed on the side of the body 2111 facing the cover 215, and is disposed in the middle of the body 2111, as shown in FIG. Figure 4B The middle portion refers to the area between the edge of the body 2111 close to the side wall 213 and the edge away from the side wall 213. The yielding portion of the cover 215 is a third groove 2159, which is provided on the side of the cover 215 facing the second protrusion 2115, and the second protrusion 2115 is received in the third groove 2159.

[0041] During assembly, the first protrusion 2113 of the magnet 211 is inserted into the first groove 2139, and then the cover 215 is fixedly connected to the side wall 213 through the first thread structure 2135 and the second thread structure 2155. At this time, the second protrusion 2115 is received in the third groove 2159, so that the magnet 211 is fixed to the side wall 213. It can be understood that when the cover 215 is initially placed on the side wall 213, the second protrusion 2115 is aligned with the third groove 2159, and as the cover 215 and the side wall 213 rotate and lock with each other along the thread structure, the locking deepens, and the second protrusion 2115 gradually penetrates into the third groove 2159.

[0042] In some embodiments, the first protrusion 3113 is disposed on the side of the body 3111 away from the cover 315, and is disposed on the edge of the body 3111 away from the side wall 313, such as Figure 5A As shown, or, the first protrusion 3113 is disposed on the side of the body 3111 away from the cover 315, and is disposed in the middle of the body 3111, as shown in FIG. Figure 5B The middle portion refers to the area between the edge of the body 3111 close to the side wall 313 and the edge away from the side wall 313 .

[0043] The extension portion 3137 is provided with a fourth groove 3139 . The extension portion 3137 is extended from the first end 3131 toward the center of the side wall 313 . The fourth groove 3139 is provided on a surface of the extension portion 3137 facing the first protrusion 3113 . The first protrusion 3113 is received in the fourth groove 3139 .

[0044] The second protrusion 3115 is disposed on the side of the body 3111 facing the cover 315, and is disposed at the edge of the body 3111 close to the side wall 313. The yielding portion is a first anti-step structure 3157, which is disposed on the side of the cover 315 facing the second protrusion 3115, and is disposed at the edge of the cover 315 close to the side wall 313. The first anti-step structure 3157 and the second end 3133 form a second groove 3159. The second protrusion 3115 is received in the second groove 3159.

[0045] During assembly, the first protrusion 3113 of the magnet 311 is inserted into the fourth groove 3139, and then the cover body 315 and the side wall 313 are fixedly connected via the first threaded structure 3135 and the second threaded structure 3155. At this time, the first anti-step structure 3157 and the side wall 313 form a second groove 3159 to accommodate and fix the second protrusion 3115, thereby fixing the magnet 311 to the side wall 313.

[0046] In some embodiments, the first protrusion 4113 is disposed on the side of the body 4111 away from the cover 415, and is disposed on the edge of the body 4111 away from the side wall 413, such as Fig. 6A , 6BAs shown, or, the first protrusion 4113 is disposed on the side of the body 4111 away from the cover 415, and is disposed in the middle of the body 4111, as shown in FIG. Figure 6C , 6D The middle portion refers to the area between the edge of the body 4111 close to the side wall 413 and the edge away from the side wall 413 .

[0047] The extension portion 4137 is provided with a fourth groove 4139 . The extension portion 4137 is extended from the first end 4131 toward the center of the side wall 413 . The fourth groove 4139 is provided on a surface of the extension portion 4137 facing the first protrusion 4113 . The first protrusion 4113 is received in the fourth groove 4139 .

[0048] The second protrusion 4115 is disposed on the side of the body 4111 facing the cover 415 and is disposed on the edge of the body 4111 away from the side wall 413. Fig. 6A , 6C As shown, or, the second protrusion 4115 is disposed on the side of the body 4111 facing the cover 415, and is disposed in the middle of the body 4111, as shown in FIG. Figure 6B , 6D The middle portion refers to the area between the edge of the body 4111 close to the side wall 413 and the edge away from the side wall 413. The yielding portion is a third groove 4159, which is provided on the surface of the cover 415 facing the second protrusion 4115, and the second protrusion 4115 is received in the third groove 4159.

[0049] During assembly, the first protrusion 4113 of the magnet 411 is inserted into the fourth groove 4139, and then the cover body 415 and the side wall 413 are fixedly connected through the first threaded structure 4135 of the second end 4133 and the second threaded structure 4155 of the cover body 415. At this time, the second protrusion 4115 is received in the third groove 4159, thereby fixing the magnet 411 to the side wall 413.

[0050] Compared with the prior art, in the motor rotor 11 provided by the utility model, the first end of the side wall is provided with an extension portion to accommodate and fix the first protrusion, the cover body is provided with a yielding portion to accommodate and fix the second protrusion, the magnet can be clamped between the side wall and the cover body, the second end is provided with a first thread structure, the cover body is provided with a second thread structure, the first thread structure and the second thread structure are fixed together, the magnet can be fixed to the side wall, no glue is required, and the reliability is high. During assembly, the magnet is installed into the side wall, and the cover body and the side wall are rotated and locked to fix the magnet, which is convenient for assembly.

[0051] Second embodiment

[0052] The second embodiment of the utility model provides a motor rotor 51, and the motor rotor 51 is applied to the motor 10, such as Figure 1 , 7As shown in Figure 8, the motor rotor 51 includes a plurality of magnets 511, a side wall 513 and a cover 515. Each magnet 511 includes a body 5111, a first protrusion 5113 and a second protrusion 5115. The side wall 513 is in a hollow ring shape. The side wall 513 includes a first end 5131 and a second end 5133 that are arranged opposite to each other. The first end 5131 is provided with an extension portion 5137. The cover 515 is in an annular cover shape and has a through hole 5151, a heat dissipation hole 5153 and a clearance portion. The structure of the motor rotor 51 is basically the same as that of the motor rotor 11 provided in the second embodiment. The difference is that the cover 515 and the second end 5133 are fixed by direct bonding.

[0053] In this embodiment, the first protrusion 5113 is disposed on the side of the body 5111 away from the cover 515, and is disposed on the edge of the body 5111 close to the side wall 513. The extension portion 5137 includes a first extension portion 51371 and a second extension portion 51373 that are connected to each other. The first extension portion 51371 is formed by extending from the first end 5131 toward the center of the side wall 513, and the second extension portion 51373 is formed by extending from the first extension portion 51371 toward the second end 5133. The first extension portion 51371, the second extension portion 51373 and the first end 5131 form a first groove 5139, and the first protrusion 5113 is received in the first groove 5139.

[0054] The second protrusion 5115 is disposed on the side of the body 5111 facing the cover 515, and is disposed at the edge of the body 5111 close to the side wall 513. The yielding portion is a first anti-step structure 5157, which is disposed on the side of the cover 515 facing the magnet 511, and is disposed at the edge of the cover 515 close to the side wall 513. The first anti-step structure 5157 and the side wall 513 form a second groove 5159, and the second protrusion 5115 is received in the second groove 5159.

[0055] During assembly, the first protrusion 5113 of the magnet 511 is inserted into the first groove 5139, and then the cover body 515 and the side wall 513 are glued and fixed. At this time, the first anti-step structure 5157 and the side wall 513 form a second groove 5159 to accommodate and fix the second protrusion 5115, thereby fixing the magnet 511 to the side wall 513.

[0056] It can be understood that in order to ensure the pasting and fixing effect, a step structure 51331 can be set at the second end 5133, and the cover body 515 is provided with a second anti-step structure 5158 corresponding to the step structure 51331. Along the height direction of the cover body 515, the upper edge of the cover body 515 is lower than the height of the upper edge of the second end 5133.

[0057] For some examples, see Fig.9A and 9B ,for Figure 8The first protrusion 6113 is provided on the side of the body 6111 away from the cover 615 and on the edge of the body 6111 close to the side wall 613 .

[0058] The extension portion 6137 includes a first extension portion 61371 and a second extension portion 61373 which are connected to each other. The first extension portion 61371 extends from the first end 6131 toward the center of the side wall 613, and the second extension portion 61373 extends from the first extension portion 61371 toward the second end 6133. The first extension portion 61371, the second extension portion 61373 and the first end 6131 form a first groove 6139, and the first protrusion 6113 is received in the first groove 6139.

[0059] The second protrusion 6115 is disposed on the side of the body 6111 facing the cover 615 and is disposed on the edge of the body 6111 away from the side wall 613. Fig.9A As shown, or, the second protrusion 6115 is provided on the side of the body 6111 facing the cover 615, and is provided in the middle of the body 6111, as shown Fig. 9B The middle portion refers to the area between the edge of the body 6111 close to the side wall 613 and the edge away from the side wall 613. The yielding portion of the cover 615 is a third groove 6159, which is provided on the side of the cover 615 facing the second protrusion 6115, and the second protrusion 6115 is received in the third groove 6159.

[0060] During assembly, the first protrusion 6113 of the magnet 611 is inserted into the first groove 6139, and then the cover body 615 is glued and fixed to the side wall 613. At this time, since the second protrusion 6115 and the third groove 6159 are aligned, the second protrusion 6115 is simultaneously accommodated in the third groove 6159, thereby fixing the magnet 611 to the side wall 613.

[0061] In some embodiments, the first protrusion 7113 is disposed on the side of the body 7111 away from the cover 715, and is disposed on the edge of the body 7111 away from the side wall 713, such as Fig. 10A As shown, or, the first protrusion 7113 is disposed on the side of the body 7111 away from the cover 715, and is disposed in the middle of the body 7111, as shown in FIG. Fig. 10B The middle portion refers to the area between the edge of the body 7111 close to the side wall 713 and the edge away from the side wall 713 .

[0062] The extension portion 7137 is provided with a fourth groove 7139 . The extension portion 7137 is extended from the first end 7131 toward the center of the side wall 713 . The fourth groove 7139 is provided on a surface of the extension portion 7137 facing the first protrusion 7113 . The first protrusion 7113 is received in the fourth groove 7139 .

[0063] The second protrusion 7115 is disposed on the side of the body 7111 facing the cover 715, and is disposed on the edge of the body 7111 close to the side wall 713. The yielding portion is a first anti-step structure 7157, which is disposed on the side of the cover 715 facing the second protrusion 7115, and is disposed on the edge of the cover 715 close to the side wall 713. The first anti-step structure 7157 and the side wall 713 surround a second groove 7159. The second protrusion 7115 is received in the second groove 7159. During assembly, the first protrusion 7113 of the magnet 711 is inserted into the fourth groove 7139, and then the cover 715 and the second end 7133 of the side wall 713 are glued and fixed. At this time, the first anti-step structure 7157 and the side wall 713 surround the second groove 7159 to receive and fix the second protrusion 7115, thereby fixing the magnet 711 to the side wall 713.

[0064] In some embodiments, the first protrusion 8113 is disposed on the side of the body 8111 away from the cover 815, and is disposed on the edge of the body 8111 away from the side wall 813, such as Fig.11A , 11B As shown, or, the first protrusion 8113 is disposed on the side of the body 8111 away from the cover 815, and is disposed in the middle of the body 8111, as shown in FIG. Fig. 11C , 11D The middle portion refers to the area between the edge of the body 8111 close to the side wall 813 and the edge away from the side wall 813 .

[0065] The extension portion 8137 is provided with a fourth groove 8139 . The extension portion 8137 is extended from the first end 8131 toward the center of the side wall 813 . The fourth groove 8139 is provided on a surface of the extension portion 8137 facing the first protrusion 8113 . The first protrusion 8113 is received in the fourth groove 8139 .

[0066] The second protrusion 8115 is disposed on the side of the body 8111 facing the cover 815 and is disposed on the edge of the body 8111 away from the side wall 813. Fig.11A , 11C As shown, or, the second protrusion 8115 is disposed on the side of the body 8111 facing the cover 815, and is disposed in the middle of the body 8111, as shown in FIG. Fig. 11B , 11D The middle portion refers to the area between the edge of the body 8111 close to the side wall 813 and the edge away from the side wall 813. The yielding portion is a third groove 8159, which is provided on the side of the cover 815 facing the second protrusion 8115, and the second protrusion 8115 is received in the third groove 8159.

[0067] During assembly, the first protrusion 8113 of the magnet 811 is inserted into the fourth groove 8139, and then the cover body 815 is glued and fixed to the second end 8133 of the side wall 813. At this time, since the second protrusion 8115 is aligned with the third groove 8159, the second protrusion 8115 is simultaneously accommodated in the third groove 8159, thereby fixing the magnet 811 to the side wall 813.

[0068] Compared with the prior art, in the motor rotor 21 provided by the utility model, the first end of the side wall is provided with an extension portion to accommodate and fix the first protrusion, and the cover body is provided with a yielding portion to accommodate and fix the second protrusion, so that the magnet can be sandwiched between the side wall and the cover body, and the cover body is pasted to the second end, so that the magnet can be fixed to the side wall. During assembly, the magnet is installed into the side wall, and the cover body and the side wall are pasted to fix the magnet, which is convenient for assembly.

[0069] Third embodiment

[0070] The third embodiment of the utility model provides a motor rotor 91, and the motor rotor 91 is applied to the motor 10, such as Figure 1 , 12 As shown in FIG. 13 , the motor rotor 91 includes a plurality of magnets 911, a side wall 913 and a cover 915. The cover 915 is fixed to one end of the side wall 913. The plurality of magnets 911 are arranged in a ring and disposed on the inner side of the side wall 913 corresponding to the winding coil 125. Specifically, the plurality of magnets 911 are arranged in a Halbach array.

[0071] Each magnet 911 includes a body 9111, a first slot 9112, and a second slot 9114, wherein the first slot 9112 and the second slot 9114 are disposed on opposite sides of the body 9111. The first slot 9112 is disposed on the side of the body 9111 away from the cover 915, and the second slot 9114 is disposed on the side of the body 9111 facing the cover 915. The first slot 9112 is arc-shaped, and a plurality of first slots 9112 are located on the same circumference, and the second slot 9114 is arc-shaped, and a plurality of second slots 9114 are located on the same circumference.

[0072] The side wall 913 is hollow and ring-shaped, and includes a first end 9131 and a second end 9133 that are oppositely arranged. The first end 9131 is provided with an extension portion 9137, and the first slot 9112 accommodates and fixes the extension portion 9137. The extension portion 9137 includes a first extension portion 91371 and a second extension portion 91373 that are connected to each other. The first extension portion 91371 is extended from the first end 9131 toward the center direction of the side wall 913, and the second extension portion 91373 is extended from the first extension portion 91371 toward the second end 9133. The second extension portion 91373 is accommodated and fixed in the first slot 9112.

[0073] The cover 915 is in the shape of an annular cover, and together with the side wall 913, forms a hollow structure with one end open to accommodate the base 121, the bearing assembly 123 and the winding coil 125. The cover 915 has a through hole 9151, a heat dissipation hole 9153 and a third protrusion 9156. The through hole 9151 is set in the central area of ​​the cover 915, and the hollow tube structure 1211 is coaxially connected with the through hole 9151. The motor shaft 13 passes through the through hole 9151, is inserted into the hollow tube structure 1211, and is fixed to the cover 915, so that the motor shaft 13 and the cover 915 rotate synchronously with each other. The heat dissipation holes 9153 surround the through hole 9151 and are evenly arranged in an array on the cover 915, so that the heat generated during the operation of the motor 10 can be smoothly dissipated. The third protrusion 9156 is formed by the cover 915 extending toward the magnet 911, and the third protrusion 9156 is received and fixed in the second slot 9114.

[0074] It is understandable that the number of the third protrusion 9156 can be one, corresponding to the circumference of the second slot 9114, and in a ring shape. The number of the third protrusion 9156 can be multiple, and two adjacent third protrusions 9156 are arranged at intervals and correspond to the second slots 9114 one by one.

[0075] The side of the cover body 915 facing the side wall 913 is fixed with the second end 9133 of the side wall 913, and the cover body 915 and the second end 9133 are fixed by threads. Specifically, the second end 9133 is provided with a first thread structure 9135, and the side of the cover body 915 facing the side wall 913 is provided with a second thread structure 9155, and the first thread structure 9135 and the second thread structure 9155 are fixed with each other.

[0076] During assembly, the second extension 91373 of the side wall 913 is inserted into the first slot 9112 of the magnet 911, and then the cover 915 is fixedly connected to the side wall 913 through the first thread structure 9135 and the second thread structure 9155. At this time, the third protrusion 9156 of the cover 915 is received and fixed in the second slot 9114. It can be understood that when the cover 915 is initially covered on the side wall 913, the third protrusion 9156 is aligned with the second slot 9114. As the cover 915 and the side wall 913 rotate and lock with each other along the thread structure, the locking deepens, and the third protrusion 9156 gradually penetrates into the second slot 9114.

[0077] It can also be understood that, to ensure the fixing effect, the first thread structure 9135 extends from the second end 9133 to the first end 9131 , extending to be roughly flush with or exceeding the end of the magnet 911 close to the cover body 915 .

[0078] It can also be understood that the first thread structure 9135 extends from the second end 9133, including the first thread structure 9135 extending from the edge of the second end 9133 of the side wall 913 as a starting point, and also including the first thread structure 9135 extending from a certain distance from the edge of the second end 9133 of the side wall 913 as a starting point.

[0079] Compared with the prior art, in the motor rotor 91 provided by the utility model, the magnet 911 is provided with a first slot 9112 and a second slot 9114, the first end 9131 of the side wall 913 is provided with an extension 9137, which is received and fixed in the first slot 9112, and the cover 915 is provided with a third protrusion 9156 which is received and fixed in the second slot 9114, so that the magnet 911 can be clamped between the side wall 913 and the cover 915, the second end 9133 is provided with a first thread structure 9135, and the cover 915 is provided with a second thread structure 9155, and the first thread structure 9135 and the second thread structure 9155 are matched and fixed, so that the magnet 911 can be fixed to the side wall 913, and no glue is required for fixing, and the reliability is high. When assembling, the magnet 911 is installed into the side wall 913, and the cover 915 and the side wall 913 are rotated and locked to fix the magnet 911, and the assembly is convenient.

[0080] Fourth embodiment

[0081] The fourth embodiment of the utility model provides a motor rotor 91a, the motor rotor 91a is applied to the motor 10, such as Fig.14 , 15 As shown, the motor rotor 91a includes a plurality of magnets 911a, a side wall 913a and a cover 915a. The cover 915a is fixed to one end of the side wall 913a. The plurality of magnets 911a are arranged in a ring and disposed on the inner side of the side wall 913a, corresponding to the winding coil 125. Specifically, the plurality of magnets 911a are arranged in a Halbach array.

[0082] Each magnet 911a includes a body 9111a, a first slot 9112a and a second slot 9114a, and the first slot 9112a and the second slot 9114a are arranged on opposite sides of the body 9111a. The first slot 9112a is arranged on the side of the body 9111a away from the cover 915a, and the second slot 9114a is arranged on the side of the body 9111a facing the cover 115a. The first slot 9112a is arc-shaped, and multiple first slots 9112a are located on the same circumference. The second slot 9114a is arc-shaped, and multiple second slots 9114a are located on the same circumference.

[0083] The side wall 913a is hollow and ring-shaped, and the side wall 913a includes a first end 9131a and a second end 9133a that are oppositely arranged. The first end 9131a is provided with an extension portion 9137a, and the extension portion 9137a includes a first extension portion 91371a and a second extension portion 91373a that are connected to each other. The first extension portion 91371a is extended from the first end 9131a toward the center direction of the side wall 913a, and the second extension portion 91373a is extended from the first extension portion 91371a toward the second end 9133a. The second extension portion 91373a is received and fixed in the first slot 9112a.

[0084] The cover 915a is in the shape of an annular cover, and together with the side wall 913a, forms a hollow structure with one end open to accommodate the base 121, the bearing assembly 123 and the winding coil 125. The cover 915a has a through hole 9151a, a heat dissipation hole 9153a and a third protrusion 9156a. The through hole 9151a is set in the central area of ​​the cover 915a, and the hollow tube structure 1211 is coaxially connected with the through hole 9151a. The motor shaft 13 passes through the through hole 9151a, is inserted into the hollow tube structure 1211, and is fixed to the cover 915a, so that the motor shaft 13 and the cover 915a rotate synchronously with each other. The heat dissipation holes 9153a surround the through hole 9151a and are evenly arranged in an array on the cover 915a, so that the heat generated during the operation of the motor 10 can be smoothly dissipated. The third protrusion 9156a is formed by extending the cover body 915a toward the magnet 911a, and the third protrusion 9156a is received and fixed in the second slot 9114a.

[0085] It is understandable that the number of the third protrusion 9156a can be one, corresponding to the circumference of the second slot 9114a, and in a ring shape. The number of the third protrusion 9156a can be multiple, and two adjacent third protrusions 9156a are arranged at intervals and correspond to the second slots 9114a one by one.

[0086] The side surface of the cover body 915a facing the side wall 913a is matched and fixed with the second end 9133a of the side wall 913a, and the cover body 915a and the second end 9133a are fixed by direct bonding.

[0087] During assembly, the second extension portion 91373a of the side wall 913a is inserted into the first slot 9112a of the magnet 911a, and then the cover 915a is glued and fixed to the side wall 913a. At this time, the third protrusion 9156a of the cover 915a is received and fixed in the second slot 9114a.

[0088] It can be understood that in order to ensure the pasting and fixing effect, a step structure 91331a can be set at the second end 9133a, and the cover body 915a is provided with a second anti-step structure 9158a corresponding to the step structure 91331a. Along the height direction of the cover body 915a, the upper edge of the cover body 915a is lower than the height of the upper edge of the second end 9133a.

[0089] Compared with the prior art, in the motor rotor 91a provided by the utility model, the magnet 911a is provided with a first slot 9112a and a second slot 9114a, the first end 9131a of the side wall 913a is provided with an extension 9137a, which is received and fixed in the first slot 9112a, and the cover 915a is provided with a third protrusion 9156a which is received and fixed in the second slot 9114a, so that the magnet 911a can be sandwiched between the side wall 913a and the cover 915a, and the cover 915a is pasted on the second end 9133a, so that the magnet 911a can be fixed to the side wall 913a. When assembling, the magnet 911a is installed into the side wall 913a, and the cover 915a and the side wall 913a are pasted, so that the magnet 911a can be fixed, and the assembly is convenient.

[0090] The above is only an implementation method of the present invention. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the protection scope of the present invention.

Claims

1. A motor rotor, comprising: Cover body; Side wall; A plurality of magnets arranged in an annular shape are disposed on the inner side of the side wall, characterized in that: The magnet comprises a body, a first protrusion and a second protrusion, wherein the first protrusion and the second protrusion are arranged on opposite sides of the body; The side wall comprises a first end and a second end which are arranged opposite to each other, the first end is provided with an extension portion, and the extension portion receives and fixes the first protrusion; The cover body is glued and fixed to the second end, and is provided with a paving portion corresponding to the second protrusion, and the paving portion accommodates and fixes the second protrusion.

2. The motor rotor according to claim 1, characterized in that: The cover body is in the shape of an annular cover, the side wall is in the shape of a hollow ring, and the cover body and the side wall together form a hollow structure with one end open.

3. The motor rotor according to claim 2, characterized in that: The first protrusion is arranged on the side of the main body away from the cover body, and is arranged on the edge of the main body close to the side wall. The extension portion includes a first extension portion and a second extension portion that are connected to each other. The first extension portion is extended from the first end toward the center of the side wall, and the second extension portion is extended from the first extension portion toward the second end. The first extension portion, the second extension portion and the first end form a first groove, and the first protrusion is accommodated in the first groove.

4. The motor rotor according to claim 2, characterized in that: The first protrusion is arranged on the side of the main body away from the cover body, and is arranged on the edge of the main body away from the side wall or the middle of the main body. The extension part is provided with a fourth groove. The extension part extends from the first end toward the center of the side wall. The fourth groove is arranged on the surface of the extension part facing the first protrusion, and the first protrusion is accommodated in the fourth groove.

5. The motor rotor according to claim 2, characterized in that: The second protrusion is arranged on the side of the main body facing the cover body, and is arranged on the edge of the main body close to the side wall. The yielding portion is a first anti-step structure. The first anti-step structure is arranged on the side of the cover body facing the magnet, and is arranged on the edge of the cover body close to the side wall. The first anti-step structure and the side wall form a second groove, and the second protrusion is accommodated in the second groove.

6. The motor rotor according to claim 2, characterized in that: The second protrusion is arranged on the side of the main body facing the cover body, and is arranged on the edge of the main body away from the side wall or the middle of the main body. The yielding part of the cover body is a third groove, and the third groove is arranged on the side of the cover body facing the second protrusion, and the second protrusion is accommodated in the third groove.

7. The motor rotor according to claim 1, characterized in that: The second end is provided with a step structure, and the cover body is provided with a second anti-step structure corresponding to the step structure. Along the height direction of the cover body, the upper edge of the cover body is lower than the height of the upper edge of the second end.

8. A motor, comprising a stator, a motor rotor and a motor shaft, wherein the stator generates a changing magnetic field to drive the motor rotor to rotate, and the motor shaft is fixed to the motor rotor and rotates synchronously with the motor rotor, characterized in that: The motor rotor is the motor rotor as claimed in any one of claims 1-7.

9. The motor according to claim 8, characterized in that The stator includes a base with a hollow tube structure, a bearing assembly and a winding coil, the winding coil is sleeved on the base, the motor shaft passes through the motor rotor and is inserted into the hollow tube structure, the bearing assembly is sleeved outside the motor shaft and clamped between the motor shaft and the hollow tube structure.

10. The motor according to claim 9, characterized in that The hollow tube structure includes a sleeve portion and a limiting portion which are connected to each other. The outer diameter of the sleeve portion corresponds to the inner diameter of the winding coil, and the outer diameter of the limiting portion is greater than the inner diameter of the winding coil.

Images