CN103051083B - Motor rotor - Google Patents

Abstract

A motor rotor includes a motor housing, a coupling member, a rotating shaft, and a hub. The motor shell is combined with the joint piece, the joint piece is provided with a first end face and a second end face which are opposite, the joint piece can be provided with a butting part, a riveting part and a shaft hole, and the butting part and the riveting part are positioned between the first end face and the second end face and are butted with the motor shell; the rotating shaft is combined with the joint; the hub is integrally injection-molded to cover the motor shell and the joint, and the hub is provided with an auxiliary covering part which covers the first end surface, the second end surface or the riveting part of the joint. Therefore, the hub can be prevented from falling off from the joint part.

Description

Motor rotor

technical field

The invention relates to a motor rotor, in particular to a motor rotor applicable to a motor structure for being driven and rotated by a stator of the motor.

Background technique

Please refer to shown in Fig. 1, for China Taiwan invention No. I279063 "fan and its rotor" patent case, this patent case discloses the existing rotor 9 that is more common at present, and this rotor 9 includes a joint 91, an impeller 92 and A rotating shaft 93. The joint part 91 has a flange part 911; the impeller 92 is integrally formed on the outer periphery of the joint part 91 by injection molding, and the impeller 92 is fitted with the flange part 911 of the joint part 91; the rotating shaft 93 One end is connected to the joint part 91 , and is riveted to a motor housing 94 by means of the joint part 91 . Accordingly, the rotor 9 can be applied to a motor structure, and when the stator of the motor structure drives the rotating shaft 93 to rotate, the impeller 92 can rotate.

The above-mentioned existing rotor 9 is mainly combined with the impeller 92 and the joint 91 by injection molding, so as to reduce the tolerance that may be caused by assembly, and make the impeller 92 of the rotor 9 and the joint 91 difficult to disengage when combined, so as to ensure that the shaft 93 It has better verticality or concentricity with the impeller 92 . However, when the impeller 92 of the conventional rotor 9 is integrally formed on the outer peripheral edge of the joint member 91, the impeller 92 is engaged with the joint member 91 only by the flange portion 911 of the joint member 91 engaging with the impeller 92. , but if the rotating shaft 93 is riveted to the motor housing 94 by means of the joint 91, the joint 91 is not riveted to the motor housing 94 (that is, the position indicated by the arrow A1 in the drawing), because the joint The end surface of the member 91 facing the flange portion 911 (that is, the position indicated by the arrow A2 on the drawing) is not integrally covered and combined by the impeller 92; therefore, when the impeller 92 rotates for a long time, it is still easy to cause the joint A loose situation is formed between the impeller 91 and the impeller 92, thereby generating noise; it may even affect the combination of the impeller 92 and the joint 91, and it is impossible to ensure that there is better verticality or concentricity between the rotating shaft 93 and the impeller 92 .

Contents of the invention

The purpose of the present invention is to improve the disadvantages of the above-mentioned existing motor rotors to provide a motor rotor that can ensure that no looseness occurs between the hub (which can be used as an impeller) and the joint.

A second object of the present invention is to provide a motor rotor capable of stably combining the hub (which can be used as an impeller) with a joint to ensure a better verticality or concentricity between the rotating shaft and the impeller.

A motor rotor according to the present invention, comprising:

a motor housing having an assembly hole;

A joint is combined with the assembly hole of the motor housing. The joint has a first end face and a second end opposite to each other. The joint is provided with an abutment portion and a shaft hole. The abutment portion is located at the between one end surface and the second end surface and abut against the motor housing;

a rotating shaft combined with the shaft hole of the joint;

and a wheel hub, which is integrally injection-molded to cover the motor casing and the joint part, and the wheel hub has an auxiliary covering part, and the auxiliary covering part covers the first end surface or the second end surface of the joint part.

The motor housing has a fixing seat, and the fixing seat has a first surface and a second surface opposite to each other, and the assembly hole runs through the first surface and the second surface.

The first end surface of the joint is located outside the motor housing, the second end surface of the joint is located inside the motor housing, the abutting part of the joint is in contact with the second surface of the motor housing, and the auxiliary covering part is entirely or The first end surface of the joint part is partially covered, the auxiliary covering part is located outside the motor shell, and the abutting part of the joint part is located inside the motor shell.

The first end surface of the joint member is located inside the motor housing, the second end surface of the joint member is located outside the motor housing, the abutment portion of the joint member abuts against the first surface of the motor housing, and all or The first end surface of the joint part is partially covered, the auxiliary covering part is located inside the motor shell, and the abutting part of the joint part is located outside the motor shell.

The fixing seat is provided with at least one through hole for covering the first end surface of the joint part when the hub is formed.

The first end surface of the joint member is located inside the motor housing, the second end surface of the joint member is located outside the motor housing, the abutment portion of the joint member abuts against the first surface of the motor housing, and all or The second end surface of the joint part is partially covered, and the auxiliary covering part and the abutting part of the joint part are located outside the motor casing.

The first end surface of the joint is located outside the motor housing, the second end surface of the joint is located inside the motor housing, the abutting part of the joint is in contact with the second surface of the motor housing, and the auxiliary covering part is entirely or The second end surface of the joint part is partially covered, and the auxiliary covering part and the abutting part of the joint part are both located inside the motor casing.

The fixing seat is provided with at least one through hole for covering the second end surface of the joint part when the hub is formed.

A riveting portion is formed on the outer peripheral surface of the joint member, and the riveting portion and the abutting portion jointly clamp the motor case.

An occlusal portion is provided on the outer peripheral surface of the engaging member, and the wheel hub and the occlusal portion are occluded and fixed to each other.

The engaging portion is an embossed pattern or a groove.

A peripheral wall is formed on the periphery of the fixing seat of the motor case, so that the motor case is a cap-shaped hollow shell.

The outer peripheral surface of the hub forms blades.

Based on the technical concept of the previously disclosed motor rotor, the motor rotor of the present invention may also include:

a motor housing having an assembly hole;

A joint, combined with the assembly hole of the motor housing, the joint has an opposite first end surface and a second end surface, the joint is provided with an abutment part, a riveting part and a shaft hole, the abutment The portion and the riveting portion are located between the first end surface and the second end surface, and the abutting portion and the riveting portion jointly clamp the motor case;

a rotating shaft combined with the shaft hole of the joint;

and a wheel hub, which is integrally injection-molded to cover the motor shell and the joint part, and the wheel hub has an auxiliary covering part, and the auxiliary covering part covers the riveting part of the joint part.

The motor housing has a fixing seat, and the fixing seat has a first surface and a second surface opposite to each other, and the assembly hole runs through the first surface and the second surface.

The abutting portion abuts against the first surface of the fixing seat.

The abutting portion abuts against the second surface of the fixing base.

An occlusal portion is provided on the outer peripheral surface of the engaging member, and the wheel hub and the occlusal portion are occluded and fixed to each other.

The engaging portion is an embossed pattern or a groove.

A peripheral wall is formed on the periphery of the fixing seat of the motor case, so that the motor case is a cap-shaped hollow shell.

The outer peripheral surface of the hub forms blades.

The beneficial effects of the present invention are:

The motor rotor of the present invention can cover the first end surface, the second end surface of the joint or the riveted part of the joint by means of the auxiliary covering part of the hub, so as to effectively prevent the occurrence of looseness between the hub and the joint, and further The beneficial effect of improving the running quality of the motor rotor is achieved.

The motor rotor of the present invention utilizes the structural design of the auxiliary cladding portion of the hub to enable the hub and the joint to be firmly combined, so as to achieve the beneficial effect of having better verticality or concentricity between the rotating shaft and the hub .

Description of drawings

Figure 1: Assembled cutaway view of an existing rotor.

Fig. 2: An exploded perspective view of the motor rotor of the first embodiment of the present invention without the hub.

Fig. 3: An assembled sectional view of the rotor of the motor according to the first embodiment of the present invention without the hub.

Fig. 4: An assembled sectional view of the motor rotor of the first embodiment of the present invention.

Fig. 5: An exploded perspective view (1) of another structural design of the motor rotor of the first embodiment of the present invention when the hub is not included.

Fig. 6: An assembled sectional view (1) of another structural design of the motor rotor of the first embodiment of the present invention.

Fig. 7: An exploded perspective view (2) of another structural design of the motor rotor in the first embodiment of the present invention when the hub is not included.

Fig. 8: An assembled sectional view (2) of another structural design of the motor rotor of the first embodiment of the present invention.

Fig. 9: A combined sectional view (3) of another structural design of the motor rotor in the first embodiment of the present invention.

Fig. 10: An assembled sectional view (4) of another structural design of the motor rotor of the first embodiment of the present invention.

Fig. 11: A combined sectional view (5) of another structural design of the motor rotor in the first embodiment of the present invention.

Fig. 12: An exploded perspective view of the second embodiment of the motor rotor without the hub.

Fig. 13: An assembled sectional view of the motor rotor of the second embodiment of the present invention.

Fig. 14: A combined sectional view of another structural design of the motor rotor in the second embodiment of the present invention.

in:

〔this invention〕

1 motor rotor 11 motor housing 11a fixing seat 11b surrounding wall

111 first surface 112 second surface 113 assembly hole 114 through hole

12 Engagement piece 121 First end surface 122 Second end surface 123 Contact part

124 shaft hole 125 occlusal part 126 riveting part 13 rotating shaft

14 Hub 141 Auxiliary cladding part 2 Motor rotor 21 Motor shell

21a fixed seat 21b peripheral wall 211 first surface 212 second surface

213 Assembly hole 22 Joint piece 221 First end surface 222 Second end surface

223 Contact part 224 Shaft hole 225 Occlusion part 226 Riveting part

23 Shaft 24 Hub 241 Auxiliary cladding part

〔current technology〕

9 Rotor 91 Joint 911 Flange 92 Hub

93 shaft 94 motor housing

Detailed ways

In order to make the above-mentioned and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, as follows:

The “outside of the motor housing” as defined throughout the present invention refers to the side where the first surface 111 of the motor housing 11 is located (refer to the subsequent description for details).

The “inside of the motor housing” as defined throughout the present invention refers to the side where the second surface 112 of the motor housing 11 is located (refer to the subsequent description for details).

Referring to FIG. 2 , FIG. 3 and FIG. 4 , the motor rotor 1 according to the first embodiment of the present invention at least includes a motor casing 11 , a joint member 12 , a rotating shaft 13 and a hub 14 . The joint part 12 is combined with the motor housing 11 , the shaft 13 is combined with the joint part 12 , and the hub 14 is integrally combined with the motor case 11 and the joint part 12 by injection molding.

The motor case 11 can be formed by means of sheet metal, such as stamping, so as to provide a magnetic sealing effect; wherein the motor case 11 has a first surface 111 and a second surface 112 opposite to each other, and a The surface 111 and an assembly hole 113 of the second surface 112, and the motor housing 11 can be shaped in various geometric shapes. In this embodiment, the motor housing 11 has a fixing seat 11a, and a peripheral wall 11b is formed on the periphery of the fixing seat 11a; thereby, the motor housing 11 is a hollow shell approximately in the shape of a cap, wherein the first surface 111 and the second surface 112 are respectively the top surface and the bottom surface of the fixing base 11a (mainly in the drawing), and the assembly hole 113 is disposed at the central part of the fixing base 11a.

The joint 12 can be a metal bushing combined with the assembly hole 113 of the motor housing 11, and the joint 12 has a first end face 121 and a second end face 122 opposite, as shown in FIG. The end face 121 and the second end face 122 are respectively located on opposite sides of the fixing seat 11a of the motor housing 11; and, the joint member 12 is provided with an abutting portion 123 and a shaft hole 124, and the abutting portion 123 can be turned by turning or forging, etc. to form an outer flange with an outer diameter larger than the diameter of the assembly hole 113 on the outer peripheral surface of the joint 12, or, after the joint 12 and the motor housing 11 are combined, they can be riveted directly on the The outer peripheral surface of the joint member 12 forms the outer flange, wherein the abutment portion 123 is located between the first end surface 121 and the second end surface 122 and abuts against the fixing seat 11a of the motor housing 11, and the shaft hole 124 is Various structural designs that can be combined with the rotating shaft 13 are available.

In this embodiment, the shaft hole 124 of the joint member 12 runs through the first end surface 121 and the second end surface 122. The part 123 abuts against the peripheral position of the assembly hole 113 of the motor case 11; moreover, an engaging part 125 can be provided on the outer peripheral surface of the engaging part 12, and the engaging part 125 can be an embossed pattern, a groove or other available The structure of the hub 14 is fixed and clad. In the embodiment shown in the figure, the occlusal portion 125 is a plurality of grooves, whereby when the hub 14 is integrally combined with the joint member 12, the hub 14 can be connected to the occlusal portion. 125 are interlocked and fixed to strengthen the bonding area between the hub 14 and the engaging member 12 , thereby providing fixing effects such as preventing axial falling off and radial rotation.

One end of the rotating shaft 13 is coupled to the shaft hole 124 of the connecting member 12 . Wherein, before the joint part 12 and the motor housing 11 are assembled, the rotating shaft 13 can be combined with the joint part 12 in advance; or, after the joint part 12 and the motor housing 11 are assembled, the rotating shaft 13 Combined with the joint 12.

The hub 14 is integrally injection-molded to cover the motor housing 11 and the joint member 12 . As shown in FIG. 4 , when the hub 14 covers the motor casing 11 and the joint 12 , the hub 14 further has a first end surface 121 or a second end surface 122 that can be used to cover the joint 12 . Auxiliary covering part 141 . Wherein, blades (not shown) may also be formed on the outer peripheral surface of the hub 14 for the motor rotor 1 to have a heat dissipation function when applied to a heat dissipation fan.

When the motor rotor 1 of the present invention is actually manufactured and assembled, it is preferable to combine the joint part 12 with the assembly hole 113 of the motor housing 11 first, and combine one end of the rotating shaft 13 with the shaft hole 124 of the joint part 12, so that Put it into an injection molding mold (not shown), and then inject plastic into the interior of the injection molding mold to form the hub 14 of a predetermined shape, so that the hub 14 can be integrally wrapped and combined with the motor housing 11 And the joint 12 to complete the manufacturing and assembling operation of the motor rotor 1 of the present invention.

More specifically, with the help of the technical concepts disclosed above, the assembly structure of the joint part 12 of the motor rotor 1 and the motor casing 11 in the first embodiment of the present invention, and the covering structure of the hub 14 and the motor casing 11 can be roughly It is further divided into the following several structural designs (only several preferred structural designs are disclosed, which are not intended to limit the present invention, and other structures with the same technical concept are still covered by the scope of the present invention), wherein:

Please refer to FIG. 2, FIG. 3 and FIG. 4, the first end surface 121 of the joint member 12 is located on the “outside of the motor housing”, and the second end surface 122 of the joint member 12 is located on the “inside of the motor housing”, wherein the joint member 12 The abutting portion 123 abuts against the second surface 112 of the motor housing 11; and, the hub 14 integrally covers the motor housing 11 and the engaging member 12, and when the engaging member 12 is provided with the engaging portion 125 ( Several grooves), the hub 14 can be interlocked and fixed with several grooves formed by the engaging portion 125 while covering the joint 12, so as to provide axial anti-falling and radial anti-rotation fixation effect, and the auxiliary covering part 141 completely covers the first end surface 121 of the joint part 12, whereby the auxiliary covering part 141 is located "outside the motor housing", and the abutting part 123 of the joint part 12 is located at the "motor shell". inside the shell".

Please refer to Fig. 5 and Fig. 6, compared with the structural design of Figs. 2, 3 and 4 disclosed above, the engaging portion 125 of the engaging part 12 is a ring groove and an embossed pattern, whereby the wheel hub 14 While wrapping the engaging part 12, it can be interlocked and fixed with the annular groove and embossed pattern formed by the engaging portion 125, so as to provide better fixing effects such as axial anti-falling and radial anti-rotation; and, The auxiliary covering portion 141 partially covers the first end surface 121 of the joint member 12 .

Please refer to Fig. 7 and Fig. 8, compared with the structural design of Fig. 2, Fig. 3 and Fig. 4, the assembly direction of the joint part 12 is opposite, so the first end surface 121 of the joint part 12 is located in the "motor housing Inside”, the second end surface 122 of the joint member 12 is located on the “outside of the motor housing”, the contact portion 123 of the joint member 12 is in contact with the first surface 111 of the motor housing 11, and the fixing seat 11a of the motor housing 11 At least one through hole 114 is provided; the occlusal part 125 of the engaging part 12 is an embossed pattern formed on the outer peripheral surface of the abutting part 123, thereby, in the process of making the hub 14 by using the injection molding mold, In addition to covering the outer peripheral surface of the motor housing 11, the hub 14 can further cover the inner peripheral surface of the motor housing 11 through the through hole 114, so that the combination of the hub 14 and the joint member 12 is more stable. In order to cooperate to form the auxiliary covering part 141 covering the first end surface 121 of the joint part 12, wherein the auxiliary covering part 141 can also partially or completely cover the first end face 121 of the joint part 12, and the The auxiliary covering portion 141 is located “inside the motor housing”, and the contact portion 123 of the joint member 12 is located “outside the motor housing”.

Please refer to FIG. 9 , the first end surface 121 of the joint member 12 is located “inside the motor housing”, and the second end surface 122 of the joint member 12 is located “outside the motor housing”, wherein the abutting portion 123 of the joint member 12 abuts against connected to the first surface 111 of the motor housing 11; and, the hub 14 integrally covers the motor housing 11 and the joint member 12, and when the joint member 12 is provided with the engaging portion 125 (embossed pattern), the While the hub 14 covers the joint part 12, it can also be interlocked and fixed with the embossed pattern formed by the engaging part 125, wherein the auxiliary covering part 141 partially covers the second end surface 122 of the joint part 12 (also The second end surface 122 may be fully covered); thereby, the auxiliary covering portion 141 and the abutting portion 123 of the joint member 12 are located “outside the motor case”.

Please refer to FIG. 10 . Compared with the structural design shown in FIG. 9 , the first end surface 121 of the joint member 12 is located on the “outside of the motor housing”, and the second end surface 122 of the joint member 12 is located on the “inside of the motor housing”. The abutting portion 123 of the engaging member 12 abuts against the second surface 112 of the motor housing 11, and the fixing seat 11a of the motor housing 11 is provided with at least one through hole 114; the engaging portion 125 of the engaging member 12 is formed on An embossed pattern on the outer peripheral surface of the abutting portion 123, thereby, in the process of making the hub 14 using the injection molding die, the hub 14 can not only cover the outer peripheral surface of the motor casing 11, but also can pass through The through hole 114 further covers the inner peripheral surface of the motor housing 11 so as to cooperate to form the auxiliary covering part 141 covering the second end surface 122 of the joint part 12, wherein the auxiliary covering part 141 can also partially cover Or completely cover the second end surface 122 of the joint member 12 so that the auxiliary covering portion 141 and the abutting portion 123 of the joint member 12 are located “inside the motor housing”.

Please refer to FIG. 11 . Compared with the structural design shown in FIG. 9 , after the motor housing 11 and the joint 12 are assembled, a riveting portion 126 can be formed on the outer peripheral surface of the joint 12 . The portion 126 abuts against the second surface 112 of the motor case 11 so as to clamp the motor case 11 together by the abutment portion 123 and the riveting portion 126 of the joint member 12 , and cooperate with the auxiliary covering portion 141 to cover the joint. The structural design of the second end surface 122 of the component 12 ensures that the motor casing 11 , the joint component 12 and the hub 14 have a better combined and fixed effect among each other.

With the help of the structural design of the motor rotor 1 of the first embodiment of the present invention, the main technical feature of the present invention is that compared with the end surface of the joint part 91 of the existing rotor 9, the hub 92 is not covered, so that the hub 92 is easy to disassemble from the hub 92. The defect of falling off on the joint 91 (as shown in FIG. 1 ); the motor rotor 1 of the present invention can not only contact the motor shell 11 with the abutment portion 123 of the joint 12 to form a preliminary positioning, but also can further utilize the hub The auxiliary covering part 141 of 14 covers all or part of the first end surface 121 or the second end surface 122 of the joint 12, so that the combination of the motor shell 11, the joint 12 and the hub 14 is more stable; Or, when the engaging part 12 is provided with the occlusal part 125, the hub 14 can be further interlocked and fixed with the occluding part 125 while covering the engaging part 12; or, when the engaging part 12 is further provided with When the riveting portion 126 is used, the abutting portion 123 and the riveting portion 126 of the joint member 12 can clamp the motor housing 11 together, thereby providing better axial anti-falling and radial anti-rotation effects; therefore, the hub 14 During long-time rotation, it can effectively prevent loosening between the joint member 12 and the hub 14 , so as to avoid noise or the hub 14 falling off from the joint member 12 .

Referring to FIG. 12 , FIG. 13 and FIG. 14 , the motor rotor 2 according to the second embodiment of the present invention at least includes a motor housing 21 , a joint member 22 , a rotating shaft 23 and a hub 24 . The motor casing 21 , the connecting member 22 and the rotating shaft 23 of the second embodiment of the present invention are substantially the same as the motor casing 11 , the connecting member 12 and the rotating shaft 13 of the first embodiment. Wherein the motor housing 21 can also have structural features such as a fixing seat 21a, a peripheral wall 21b, a first surface 211, a second surface 212, an assembly hole 213 and a through hole 214; the joint member 22 can also have a first end surface 221, a second Structural features such as two end faces 222, abutting portion 223, shaft hole 224, occlusal portion 225, and riveting portion 226; therefore, the motor rotor 2 of this embodiment has the same structural features and bonding relationship as the motor rotor 1 of the first embodiment disclosed above. I won't go into details.

The abutting portion 223 of the engaging member 22 in the second embodiment of the present invention can be selectively abutted against the first surface 211 or the second surface 212 of the motor housing 21. The embodiment shown in FIG. 13 discloses that the abutting portion 223 abuts against Connected to the first surface 211 of the motor housing 21, and the embodiment shown in FIG. After the assembly is completed, the riveting portion 226 is further processed on the outer peripheral surface of the joint member 22, the contact portion 223 and the riveting portion 226 of the joint member 22 clamp the motor housing 21 together, and the hub 24 is also integrally injection molded Coating the motor shell 21 and the joint part 22; thus, the main difference between the motor rotor 2 of this embodiment and the motor rotor 1 of the first embodiment is that the hub 24 covers the motor shell 21 and the joint part 22 At this time, the hub 24 further has an auxiliary covering portion 241 that can partially or completely cover the riveting portion 226 of the joint member 22 .

With the help of the structural design of the motor rotor 2 in the second embodiment of the present invention, the auxiliary covering part 241 of the hub 24 of the present invention can further cover the riveting part 226 formed by the joint part 22, compared with the first embodiment For the motor rotor 1, even if the motor rotor 2 of the present embodiment is not riveted to the motor housing 21 at the riveted portion 226 of the joint member 22, since the auxiliary covering portion 241 covers the riveted portion 226, it can still effectively Ensure that the motor housing 21, the joint 22 and the hub 24 have good joint stability; therefore, when the hub 24 rotates for a long time, it can also effectively prevent loosening between the joint 22 and the hub 24 Phenomenon, to reduce the generation of noise, and prevent the hub 24 from falling off from the joint 22 .

As mentioned above, the motor rotors 1 and 2 of the present invention can indeed achieve many beneficial effects as follows:

The motor rotor 1, 2 of the present invention can cover the first end surface 121, the second end surface 122 of the joint member 12 or the riveted part 226 of the joint member 22 by means of the auxiliary covering part 141, 241 of the hub 14, 24, so as to effectively Prevent the hub 14 , 24 from loosening between the joint parts 12 , 22 , thereby achieving the beneficial effect of improving the running quality of the motor rotor 1 , 2 .

The motor rotor 1, 2 of the present invention utilizes the structural design of the auxiliary cladding portion 141, 241 of the hub 14, 24 to enable the hub 14, 24 to be firmly combined with the joint member 12, 22, so as to make the rotating shaft 13 , 23 and the hub 14, 24 have the beneficial effect of better verticality or concentricity.

But above-mentioned person, only preferred embodiment of the present invention, should not limit the implementation range of the present invention with this; All should still belong to the scope that the patent of the present invention covers.

Claims (18)

1. A motor rotor, characterized in that it comprises: a motor housing having an assembly hole; A joint, combined with the assembly hole of the motor housing, the joint has an opposite first end surface and a second end surface, the joint is provided with an abutment portion, a shaft hole and the outer peripheral surface of the joint forms a a riveting portion, the abutting portion is located between the first end surface and the second end surface, and the riveting portion and the abutting portion jointly clamp the motor case; a rotating shaft combined with the shaft hole of the joint; and a hub, which is integrally injection-molded to cover the motor housing and the joint, and the hub has an auxiliary covering part, and the auxiliary covering part covers the first end surface or the second end surface of the joint; An occlusal part is provided on the outer peripheral surface of the engaging part, and the wheel hub and the occlusal part are mutually occluded and fixed. 2. The motor rotor according to claim 1, wherein the motor casing has a fixing seat, the fixing seat has a first surface and a second surface opposite to each other, and the assembly hole penetrates the first surface and the first surface and the second surface. second surface. 3. The motor rotor according to claim 2, wherein the first end surface of the joint is located outside the motor housing, the second end surface of the joint is located inside the motor housing, and the abutting portion of the joint abuts against On the second surface of the motor case, the auxiliary covering part completely or partially covers the first end surface of the joint part, the auxiliary covering part is located outside the motor case, and the abutting part of the joint part is located inside the motor case. 4. The motor rotor according to claim 2, wherein the first end surface of the joint is located inside the motor housing, the second end surface of the joint is located outside the motor housing, and the abutting portion of the joint abuts against On the first surface of the motor housing, the auxiliary covering part completely or partially covers the first end surface of the joint part, the auxiliary covering part is located inside the motor housing, and the abutting part of the joint part is located outside the motor housing. 5 . The motor rotor as claimed in claim 4 , wherein the fixing seat is provided with at least one through hole for covering the first end surface of the joint member when the hub is formed. 6 . 6. The motor rotor according to claim 2, wherein the first end surface of the joint is located inside the motor housing, the second end surface of the joint is located outside the motor housing, and the abutting portion of the joint abuts against The first surface of the motor housing, the auxiliary covering part completely or partially covers the second end surface of the joint part, and the auxiliary covering part and the abutting part of the joint part are located outside the motor case. 7. The motor rotor according to claim 2, wherein the first end surface of the joint is located outside the motor housing, the second end surface of the joint is located inside the motor housing, and the abutting portion of the joint abuts against On the second surface of the motor housing, the auxiliary covering part completely or partially covers the second end surface of the joint part, and both the auxiliary covering part and the abutting part of the joint part are located inside the motor housing. 8 . The motor rotor as claimed in claim 7 , wherein the fixing seat is provided with at least one through hole for covering the second end surface of the joint member when the hub is formed. 9. The motor rotor according to claim 1, wherein the engaging portion is an embossed pattern or a groove. 10. The motor rotor according to claim 2, 3, 4, 5, 6, 7 or 8, characterized in that, the periphery of the fixing seat of the motor housing forms a circumferential wall, so that the motor housing is in the shape of a cap. empty case. 11. The motor rotor according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the outer peripheral surface of the hub forms blades. 12. A motor rotor, characterized in that it comprises: a motor housing having an assembly hole; A joint, combined with the assembly hole of the motor housing, the joint has an opposite first end surface and a second end surface, the joint is provided with an abutment part, a riveting part and a shaft hole, the abutment The portion and the riveting portion are located between the first end surface and the second end surface, and the abutting portion and the riveting portion jointly clamp the motor case; a rotating shaft combined with the shaft hole of the joint; and a hub, which is integrally injection-molded to cover the motor housing and the joint, and the hub has an auxiliary covering part, and the auxiliary covering part covers the riveting part of the joint; An occlusal part is provided on the outer peripheral surface of the engaging part, and the wheel hub and the occlusal part are mutually occluded and fixed. 13. The motor rotor according to claim 12, wherein the motor housing has a fixing seat, the fixing seat has a first surface and a second surface opposite to each other, and the assembly hole penetrates the first surface and the second surface. second surface. 14. The motor rotor according to claim 13, wherein the abutting portion abuts against the first surface of the fixing seat. 15. The motor rotor as claimed in claim 13, wherein the abutting portion abuts against the second surface of the fixing seat. 16. The motor rotor according to claim 13, wherein the engaging portion is an embossed pattern or a groove. 17. The motor rotor according to claim 12, 13, 14 or 15, characterized in that, the periphery of the fixing seat of the motor casing forms a circumferential wall, so that the motor casing is a cap-shaped hollow casing. 18. The motor rotor of claim 12, 13, 14 or 15, wherein the outer peripheral surface of the hub forms blades.