Rubber ring for fixing motor, motor and motor assembly

Abstract

The application relates to the air conditioner technical field, discloses a rubber ring for fixing a motor, a first positioning structure is arranged on the inner wall of the rubber ring, and the relative displacement between the rubber ring and the motor can be limited. A motor comprises a fixing part and a output shaft side fixing part; wherein the fixing part and / or the output shaft side fixing part is provided with a second positioning structure; the second positioning structure is adapted to the first positioning structure of the aforementioned rubber ring. A motor assembly comprises a rubber ring and a motor, the rubber ring is sleeved on the fixing part and / or the output shaft side fixing part of the motor, and the first positioning structure cooperates with the second positioning structure. The first positioning structure is arranged on the inner wall of the rubber ring which contacts the motor, and cooperates with the second positioning structure on the motor, so that the relative position between the rubber ring and the motor can be limited, the relative displacement of the two is prevented, and the assembly reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, for example, to a rubber ring for fixing a motor, a motor, and a motor assembly. Background Art

[0002] Currently, the motor ends (fixed end and output shaft end) of a wall-mounted air conditioner crossflow fan are connected to rubber rings, which are then connected to the motor's fixed structure (motor cover). Typically, a continuous concave-convex structure is formed on the outer wall of the rubber ring to increase the spacing between the rubber ring and the motor cover, preventing relative displacement between the rubber ring and the motor cover. During the implementation of the disclosed embodiments, it was discovered that the related art has at least the following problems: relative rotation between the motor and the rubber ring is prone to occur, reducing assembly reliability. Summary of the Invention

[0003] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0004] The embodiments of the present disclosure provide a rubber ring for fixing a motor, a motor, and a motor assembly to solve the technical problem that relative rotation is easily caused between the existing motor and the rubber ring.

[0005] In some embodiments, a rubber ring for fixing a motor is provided, wherein a first positioning structure is provided on the inner wall of the rubber ring, which can limit the relative displacement between the rubber ring and the motor.

[0006] In some embodiments, a motor includes a fixing portion and an output shaft side fixing portion; wherein a second positioning structure is provided on the fixing portion and / or the output shaft side fixing portion; the second positioning structure is configured to be compatible with the first positioning structure of the aforementioned rubber ring.

[0007] In some embodiments, a motor assembly includes,

[0008] The aforementioned rubber ring; the aforementioned motor, the rubber ring is sleeved on the fixing portion of the motor and / or the fixing portion on the output shaft side, and the first positioning structure cooperates with the second positioning structure.

[0009] The embodiments of the present disclosure provide a motor fixing rubber ring, a motor, and a motor assembly, which can achieve the following technical effects:

[0010] In the embodiment of the present disclosure, a first positioning structure is provided on the inner wall of the rubber ring in contact with the motor, which can cooperate with the second positioning structure on the motor to limit the relative position between the rubber ring and the motor, prevent relative displacement between the two, and improve assembly reliability.

[0011] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are similar elements. The drawings do not constitute a scale limitation. In addition,

[0013] Figure 1 This is a schematic structural diagram of a rubber ring provided by an embodiment of the present disclosure;

[0014] Figure 2 This is a schematic structural diagram of a rubber ring provided by an embodiment of the present disclosure;

[0015] Figure 3 This is a schematic structural diagram of a rubber ring provided by an embodiment of the present disclosure;

[0016] Figure 4 This is a schematic structural diagram of a rubber ring provided by an embodiment of the present disclosure;

[0017] Figure 5 This is a schematic structural diagram of a rubber ring provided by an embodiment of the present disclosure;

[0018] Figure 6 is a structural schematic diagram of a motor provided by an embodiment of the present disclosure;

[0019] Figure 7 is a structural schematic diagram of a motor provided by an embodiment of the present disclosure;

[0020] Figure 8 is a structural schematic diagram of a motor assembly provided by an embodiment of the present disclosure;

[0021] Figure 9 is a structural schematic diagram of a motor assembly provided by an embodiment of the present disclosure;

[0022] Figure 10 is a structural schematic diagram of a motor assembly provided by an embodiment of the present disclosure;

[0023] Figure 11 is a schematic diagram of an exploded structure of a motor assembly provided by an embodiment of the present disclosure;

[0024] Figure 12 is a schematic diagram of an exploded structure of a motor assembly provided by an embodiment of the present disclosure;

[0025] Figure 13 is a schematic diagram of an exploded structure of a motor assembly provided by an embodiment of the present disclosure;

[0026] Reference numerals:

[0027] 10. Rubber ring; 101. Inner wall; 102. Outer wall; 11. First positioning structure; 12. First limiting structure; 20. Motor; 201. Fixing part; 202. Output shaft side fixing part; 21. Second positioning structure; 22. Output shaft; 23. Wire outlet; 31. Motor front cover; 310. Mounting hole; 311. Rubber ring assembly groove; 3110. Second limiting structure; 32. Motor rear cover; 320. Wire avoidance part. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] In this document, it should be understood that relational terms such as first and second, etc. are merely used to distinguish one entity or structure from another entity or structure, but do not require or imply any actual relationship or order between these entities or structures.

[0030] In this document, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0031] In this document, unless otherwise specified or limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0032] As used herein, it is to be understood that the term "plurality" refers to two or more than two.

[0033] The embodiment of the present disclosure provides a rubber ring for fixing a motor. Figures 1 to 5As shown, the rubber ring 10 has a first positioning structure 11 provided on its inner wall 101 , which can limit the relative displacement between the rubber ring 10 and the motor 20 .

[0034] The motor-fixing rubber ring 10 of the disclosed embodiment is disposed between the motor 20 and the motor cover. The motor cover is a fixed structure for fixing and assembling the motor 20. Here, the motor cover can be the motor front cover 31, which is used to fix the fixed end side of the motor 20, or the motor rear cover 32, which is used to fix the output shaft side of the motor 20. Therefore, at least the outer wall 102 of the rubber ring 10 contacts the motor cover. The inner ring of the rubber ring 10 is sleeved on the motor 20, so that at least the inner wall 101 of the rubber ring 10 contacts the motor 20. Therefore, a first positioning structure 11 is provided on the inner wall 101 of the rubber ring 10 that contacts the motor 20. This structure cooperates with a second positioning structure 21 on the motor 20 (see the motor embodiment section below) to define the relative position between the rubber ring 10 and the motor 20, preventing relative displacement between the two and improving assembly reliability.

[0035] In some embodiments, the number of the first positioning structures 11 is not limited and can be determined according to actual needs. Optionally, the number of the first positioning structures 11 is 1, 2, 3 or more, and is not limited. That is, the first positioning structure 11 is one (such as Figures 1 to 3 as shown) or multiple (as shown Figure 4 and Figure 5 shown).

[0036] Optionally, when there are multiple first positioning structures 11, the multiple first positioning structures 11 are arranged unevenly. Furthermore, the multiple first positioning structures 11 will not overlap after rotating a certain angle with the center of the rubber ring as the midpoint. Here, the certain angle is not 360°. Optionally, the certain angle is greater than 0° and less than 360°. For example, the certain angle is 30°, 60°, 90°, 120° or 180°, etc. The uniqueness of the positioning of the first positioning structure 11 can be guaranteed during the assembly process. For example, the uniqueness of the matching angle between the first positioning structure 11 and the second positioning structure 21 is guaranteed. The motor assembly positioning is accurate and the assembly speed is fast, thereby improving assembly efficiency.

[0037] Alternatively, as Figure 4 and Figure 5 As shown, the number of the first positioning structures 11 is an odd number, as long as the odd number of first positioning structures 11 is unevenly arranged.

[0038] Optionally, the number of the first positioning structures 11 is an even number. The even number of first positioning structures 11 is unevenly arranged and will not overlap after rotating a certain angle around the center of the rubber ring. For example, the certain angle is 180°.

[0039] In the embodiment of the present disclosure, the structure of the first positioning structure 11 is not limited, as long as it can achieve positioning and matching with the motor fixing portion 201. Figures 1 to 5 As shown, the first positioning structure 11 is a groove. Of course, the first positioning structure 11 can also be a protrusion, which can be determined according to actual needs.

[0040] In some embodiments, as Figures 2 to 5 As shown, the outer wall 102 of the rubber ring 10 is provided with a first limiting structure 12, which limits the relative displacement between the rubber ring 10 and the motor cover. In this embodiment, the first positioning structure 11 is provided on the inner wall 101 of the rubber ring 10, and the first limiting structure 12 is provided on the outer wall 102. This prevents relative displacement between the rubber ring 10 and the motor cover while further improving the assembly reliability of the motor. In this embodiment, the motor cover can be either the motor front cover 31 or the motor rear cover 32.

[0041] In the disclosed embodiment, the structure of the first limiting structure 12 is not limited, as long as it can achieve limiting cooperation with the motor cover. Optionally, the first limiting structure 12 is a protrusion. Of course, the first limiting structure 12 can also be a groove, which can be determined according to actual needs.

[0042] Optionally, the first positioning structure 11 is a groove, and the first limiting structure 12 is a protrusion, which has a simple structure and is easy to form.

[0043] In the embodiment of the present disclosure, the first limiting structure 12 is not limited in the location on the outer wall of the rubber ring, and the number of the first limiting structure 12 is not limited, and can be set according to actual needs.

[0044] Optionally, there is one first limiting structure 12 .

[0045] In some embodiments, there is one first positioning structure 11, and the first positioning structure 11 is arranged on the radial direction l1 where the first limiting structure 12 is located. Figure 3 and Figure 13 As shown, there is one first limiting structure 12 , which is arranged in the same radial direction of the rubber ring 10 .

[0046] In some embodiments, there are multiple first positioning structures 11, and the multiple first positioning structures 11 are distributed with the radial direction l1 where the first limiting structure 12 is located as the symmetry axis. Figure 5 As shown, there is one first limiting structure 12, and three first positioning structures 11 are distributed with the radial direction of the first limiting structure 12 as the symmetric axis (combined with Figure 13 The radial direction 11) where the first limiting structure 12 is located is shown in FIG.

[0047] That is, the rubber rings in the embodiments of the present disclosure provide two types of rubber rings.

[0048] In some embodiments, as Figure 1 As shown, the first rubber ring has a first positioning structure 11 provided on its inner wall 101 .

[0049] In some embodiments, as Figures 2 to 5 As shown, the second type of rubber ring has a first positioning structure 11 provided on its inner wall 101 and a first limiting structure 12 provided on its outer wall.

[0050] In the disclosed embodiment, the motor 20 is provided with a wire outlet 23 for lead-in; a wire outlet avoidance portion 320 is provided on the motor back cover 32; during the assembly process, the wire outlet 23 of the motor 20 needs to correspond to the wire outlet avoidance portion 320 of the motor back cover 32 in order to be assembled smoothly. During the motor assembly process, the relative fixed positions of the motor front cover 31 and the motor back cover 32 are certain. Therefore, when the motor 20 is installed on the motor cover (for example, the motor front cover 31), it is necessary to control the installation angle of the motor 20 to ensure that the wire outlet 23 of the motor 20 corresponds to the wire outlet avoidance portion 320 of the motor back cover 32. In the existing assembly process, the wire outlet 23 of the motor 20 cannot be accurately positioned and needs to be repeatedly adjusted to ensure that the wire outlet 23 of the motor 20 corresponds to the wire outlet avoidance portion 320 of the motor back cover 32, which reduces the assembly efficiency and results in low assembly efficiency of the motor.

[0051] However, the second type of rubber ring in the embodiment of the present disclosure can solve the above technical problems when it is applied to the fixing portion 201 of the fixed end of the motor 20. The second type of rubber ring is provided with one or more first positioning structures 11 (which can cooperate with the second positioning structure 21 provided on the fixing portion 201 of the motor 20) on the inner wall of the fixing portion 201 of the fixed end of the motor 20, and at the same time, a first limiting structure 12 (which can cooperate with the second limiting structure provided on the motor front cover 31) is provided on the outer wall 102 of the rubber ring 10 in contact with the motor front cover 31. The first positioning structure 11 and the first limiting structure 12 work together to achieve the assembly positioning of the motor fixing portion 201, ensure that the outlet port 23 of the motor 20 corresponds to the outlet avoidance portion 320 of the motor rear cover 32, make the motor assembly smooth, and fast, and improve assembly efficiency.

[0052] The embodiment of the present disclosure provides a motor 20. Figures 1 to 7 As shown, the motor 20 has a fixing portion 201 and an output shaft side fixing portion 202; wherein, a second positioning structure 21 is provided on the fixing portion 201 and / or the output shaft side fixing portion 202; the second positioning structure 21 is configured to be compatible with the first positioning structure 11 of the aforementioned rubber ring 10.

[0053] In the motor 20 of the embodiment of the present disclosure, the second positioning structure 21 is set at a position on the fixing portion 201 opposite to the first positioning structure 11 of the rubber ring 10 when the motor 20 is assembled with the motor front cover 31 and the motor rear cover 32 and the wire outlet 23 of the motor 20 corresponds to the wire outlet avoidance portion 320 of the motor rear cover 32.

[0054] In the embodiment of the present disclosure, a second positioning structure 21 can be provided on the fixing portion 201 of the motor 20, or the output shaft side fixing portion 202, or the fixing portion 201 and the output shaft side fixing portion 202, for cooperating with the first positioning structure 11 of the rubber ring 10 to prevent relative rotation between the motor 20 and the rubber ring 10 and improve assembly reliability.

[0055] In some embodiments, as Figure 6 As shown, a motor 20 (defined as a first motor) has a second positioning structure 21 provided on its fixing portion 201 ; the second positioning structure 21 is adapted to the first positioning structure 11 of the aforementioned rubber ring 10 .

[0056] In some embodiments, as Figure 7 As shown, a motor 20 (defined as a second motor) has a second positioning structure 21 provided on its fixing portion 201 and the output shaft side fixing portion 202 ; the second positioning structure 21 is adapted to the first positioning structure 11 of the aforementioned rubber ring 10 .

[0057] In some embodiments, a motor 20 (defined as a third motor) has a second positioning structure 21 disposed on its output shaft-side fixing portion 202 ; the second positioning structure 21 is adapted to the first positioning structure 11 of the aforementioned rubber ring 10 .

[0058] In the embodiment of the present disclosure, the rubber ring 10 provided on the fixing portion 201 or the output shaft side fixing portion 202 of the motor 20 may be the aforementioned first type of rubber ring or the aforementioned second type of rubber ring, without limitation.

[0059] In some embodiments, a second type of rubber ring is provided on the fixing portion 201 of the motor 20. During the fixing and installation process of the motor 20, after the first limiting structure 12 on the second type of rubber ring is fixedly installed with the motor front cover 31, the position of the first positioning structure 11 on the second type of rubber ring is fixed. At this point, when the motor is assembled using the second positioning structure 21 on the motor 20 in a manner that the second positioning structure 21 and the first positioning structure 11 are adapted, the wire outlet 23 of the motor 20 can be ensured to correspond with the wire outlet avoidance portion 320 of the motor rear cover 32, and the positioning preparation is completed, so that the motor assembly is smooth and fast, thereby improving assembly efficiency.

[0060] In the embodiment of the present disclosure, when the rubber ring 10 has a plurality of first positioning structures 11 , correspondingly, there are a plurality of second positioning structures 21 . The plurality of second positioning structures 21 can be arranged correspondingly according to the positions of the first positioning structures 11 .

[0061] Optionally, the plurality of second positioning structures 21 are not arranged with the radial direction 12 of the motor 20 as the axis of symmetry. This further ensures the uniqueness of the mating positioning of the first positioning structure 11 and the second positioning structure 12 during assembly. This prevents the first positioning structure 11 from still mating with the second positioning structure 12 after the motor body is rotated by a certain angle. For example, the certain angle may be 30°, 60°, 90°, 120°, or 180°.

[0062] In the embodiment of the present disclosure, the structure of the second positioning structure 21 is not limited, as long as it can achieve positioning and matching with the first positioning structure 11 on the rubber ring 10. Optionally, the second positioning structure 21 is a protrusion (with Figures 1 to 5 Of course, the second positioning structure 21 can also be a groove, and correspondingly, the first positioning structure can be a protrusion, which can be determined according to actual needs.

[0063] The present disclosure provides a motor assembly. Figures 8 to 12 As shown, the motor assembly includes the aforementioned rubber ring 10 and the aforementioned motor 20. The rubber ring 10 is sleeved on the fixing portion 201 and / or the output shaft side fixing portion 202 of the motor 20, and the first positioning structure 11 cooperates with the second positioning structure 21.

[0064] In the motor assembly of the embodiment of the present disclosure, the rubber ring 10 and the motor 20 are positioned by the first positioning structure 11 and the second positioning structure 21, which can effectively prevent relative rotation between the motor 20 and the rubber ring 10 and improve assembly reliability.

[0065] In the disclosed embodiment, the rubber ring 10 provided on the fixing portion 201 or the output shaft-side fixing portion 202 of the motor 20 can be either the first or second type of rubber ring, without limitation. The rubber ring 10 provided on the fixing portion 201 and the output shaft-side fixing portion 202 can be of different types.

[0066] In some embodiments, as Figure 11 and Figure 12As shown, the first type of rubber ring is sleeved on the output shaft side fixing portion 202 of the motor 20; the second type of rubber ring is sleeved on the fixing portion 201 of the motor 20; then, the motor assembly also includes a motor front cover 31, which is arranged on the fixing portion 201 of the motor 20; a rubber ring assembly groove 311 is provided on the motor front cover 31; a second limiting structure 3110 is provided on the groove wall of the rubber ring assembly groove 311; the second limiting structure 3110 cooperates with the first limiting structure 12 of the second type of rubber ring.

[0067] During assembly of the motor assembly of this embodiment, the second rubber ring 10 is assembled onto the motor front cover 31 using the first limiting structure 12 and the second limiting structure 3110. The motor 20 is then positioned and assembled onto the motor front cover 31 using the first positioning structure 11 and the second positioning structure 21. The first rubber ring is then sleeved onto the output shaft-side fixing portion 202 of the motor 20. The motor rear cover 32 is then sleeved onto the output shaft 22 of the motor 20 and secured. This ensures that the wire outlet 23 of the motor 20 aligns with the wire outlet avoidance portion 320 of the motor rear cover 32, ensuring proper positioning and preparation, allowing for smooth and efficient motor assembly.

[0068] In the disclosed embodiment, the motor front cover 31 is generally provided with a mounting hole 310 for mounting the fixing portion 201 of the motor 20. The mounting hole 310 can be a through hole or a blind hole. A rubber ring mounting groove 311 is provided in the mounting hole 310.

[0069] Alternatively, as Figure 11 As shown, a rubber ring assembly groove 311 is provided on the edge of the mounting hole 310 on the inner side of the motor front cover 31. Mounting hole 310 is formed into a stepped hole-like structure, with the larger diameter stepped groove serving as the rubber ring assembly groove 311. The rubber ring 10 is positioned within this stepped groove, and a second retaining structure 3110 is provided on the groove wall that contacts the outer wall 102 of the rubber ring 10.

[0070] In some embodiments, as Figure 13 As shown, when the second rubber ring is sleeved on the fixing portion 201 of the motor 20, a set angle α is formed between the radial direction of the first limiting structure 12 on the second rubber ring and the radial direction of the wire outlet 23 of the motor 20. Optionally, the value range of the set angle α is: 0°<α<180°. Optionally, the value range of the set angle α is: 30°≤α≤150°. Optionally, the set angle α is 30°, 60°, 90°, 120° or 150°, etc. Of course, the angles listed above are not limited, as long as the angle satisfies 0°<α<180°.

[0071] In some embodiments, the motor assembly further includes a motor back cover 32 disposed on the output shaft 22 side of the motor 20. The provision of the first rubber ring increases the assembly reliability of the motor back cover 32 and the motor 20 and prevents the two from rotating relative to each other.

[0072] Of course, a second type of rubber ring can also be sleeved onto the output shaft-side fixing portion 202 of the motor 20. In this case, a corresponding rubber ring assembly groove is provided on the motor back cover 32, and a second retaining structure is provided on the wall of the rubber ring assembly groove to engage with the first retaining structure 12 on the second type of rubber ring. In this case, by adjusting the positioning of the second positioning structure on the output shaft-side fixing portion 202, and the positioning of the first positioning structure 11 and the first retaining structure 12 on the second type of rubber ring, the motor back cover 32 can be accurately positioned and assembled, further improving assembly speed and efficiency.

[0073] The motor assembly of the embodiment of the present disclosure can be applied to an air conditioner wall unit as a driving motor for a cross-flow fan.

[0074] The present application is not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A motor assembly, characterized in that: include, A motor comprising a fixed end side fixing portion and an output shaft side fixing portion; wherein the fixed end side fixing portion is provided with a plurality of second positioning structures, and the plurality of second positioning structures are not distributed with the radial direction of the motor outlet as the symmetrical axis; A second type of rubber ring, wherein a plurality of first positioning structures are provided on the inner wall of the second type of rubber ring, which can limit the relative displacement between the rubber ring and the motor; a first limiting structure is provided on the outer wall of the second type of rubber ring, which can limit the relative displacement between the rubber ring and the motor cover; the second type of rubber ring is sleeved on the fixed portion of the fixed end side of the motor, and the first positioning structure cooperates with the second positioning structure; a set angle α is formed between the radial direction of the first limiting structure on the second rubber ring and the radial direction of the motor outlet; the value range of the set angle α is: 0°<α<180°; wherein the plurality of first positioning structures are unevenly arranged and one of the first positioning structures is in the radial direction of the first limiting structure, and the plurality of first positioning structures will not overlap after being rotated a certain angle with the center of the rubber ring as the midpoint; The motor front cover is arranged on the fixed end side fixing part of the motor; the motor front cover is provided with a mounting hole for assembling the fixed end side fixing part of the motor; the motor front cover is provided with a rubber ring assembly groove; the groove wall of the rubber ring assembly groove is provided with a second limiting structure; the second limiting structure cooperates with the first limiting structure of the second rubber ring; the rubber ring assembly groove is provided on the edge of the mounting hole on the inner side surface of the motor front cover, so that the mounting hole forms a stepped hole structure, then the large-diameter stepped ring groove is the rubber ring assembly groove, the second rubber ring is provided in the stepped ring groove, and the second limiting structure is provided on the groove wall of the stepped ring groove in contact with the outer wall of the second rubber ring.

2. The motor assembly according to claim 1, wherein: Also includes, The output shaft side fixing portion of the motor is further provided with a plurality of second positioning structures, wherein the plurality of second positioning structures are not distributed with the radial direction of the motor outlet as the symmetrical axis; The output shaft side fixing portion of the motor is provided with the first rubber ring or the second rubber ring; Wherein, the first type of rubber ring has a plurality of first positioning structures provided on its inner wall; the first positioning structures cooperate with the second positioning structures.

3. The motor assembly according to claim 2, characterized in that Also includes, A motor rear cover is provided on the output shaft side of the motor; When a second type of rubber ring is provided on the fixed portion on the output shaft side of the motor, a corresponding rubber ring assembly groove is provided on the rear cover of the motor, and a second limiting structure is provided on the groove wall of the rubber ring assembly groove; it is used to cooperate with the first limiting structure on the second type of rubber ring.

4. The motor assembly according to any one of claims 1 to 3, characterized in that: The first positioning structure is a groove.

5. The motor assembly according to any one of claims 1 to 3, characterized in that: The first positioning structure is a groove; the first limiting structure is a protrusion.

6. The motor assembly according to any one of claims 1 to 3, characterized in that: The second positioning structure is a protrusion.

7. The motor assembly according to any one of claims 1 to 3, characterized in that: The value range of the included angle α is set to: 30° ≤α≤150°.

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