A motor end cover, a motor, and a washing machine

Abstract

This invention relates to the field of motor technology, and more particularly to motor end covers, motors, and washing machines. The motor end cover provided by this invention includes an end cover body and an end cover plate. The end cover body has a hollow structure, and the end cover plate is connected to the end cover body to cover the hollow structure. The end cover body is made of metal, and the end cover plate is made of engineering plastic. The motor end cover provided by this invention is low in cost and lightweight, ensuring normal motor operation and quiet operation. The motor and washing machine provided by this invention, by applying the above-mentioned motor end cover, can achieve the effects of low cost, light weight, normal operation, and quiet operation.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a motor end cover, a motor, and a washing machine. Background Technology

[0002] The motor includes a front cover, a rear cover, a stator, and a rotor. The rotor is housed inside the stator and rotatably connected to it. To facilitate the installation and protection of the stator, a front cover and a rear cover are respectively provided at the front and rear ends of the stator. Traditionally, the front and rear covers are usually integral metal end covers, made of materials such as aluminum alloy or zinc alloy. However, metal is relatively expensive, and metal end covers are quite heavy.

[0003] To address the aforementioned issues, existing front and rear end covers are made of metal, but the end covers feature multiple perforated structures. This reduces the amount of metal used, lowering the cost of the end covers, and also effectively reduces the weight of the motor. However, these end covers also present some problems. For example, other components or impurities in the working environment can enter the stator and rotor through the perforated structures, causing rotor jamming and affecting the normal operation of the motor. Furthermore, noise generated during motor operation can be transmitted through the perforated structures, resulting in excessive motor noise during operation.

[0004] Therefore, there is an urgent need to invent a motor end cover, a motor, and a washing machine that can solve the problems of high cost of motor end covers, large weight of motor end covers, easy jamming of motors, and high noise of motors during operation. Summary of the Invention

[0005] The first objective of this invention is to provide a motor end cap that is low in cost and lightweight, ensuring normal operation of the motor and quiet operation.

[0006] The second objective of this invention is to provide a motor that is low in cost, lightweight, structurally stable, operates normally, and has a quiet operation.

[0007] The third objective of this invention is to provide a washing machine that is low in cost, lightweight, structurally stable, operates normally, and operates quietly.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] An end cover for an electric motor includes an end cover body and an end cover plate. The end cover body has a hollow structure, and the end cover plate is connected to the end cover body to cover the hollow structure. The end cover body is made of metal, and the end cover plate is made of engineering plastic.

[0010] As a preferred embodiment, one of the end cap body and the end cap cover plate is provided with a slot, and the other is provided with a hook, the hook being engaged in the slot.

[0011] As a preferred embodiment, the hook includes an elastically deformable portion and a first engaging portion. One end of the elastically deformable portion is connected to the end cap body or the end cap cover plate, and the other end is provided with the first engaging portion. The first engaging portion includes an abutment surface that gradually extends outward from the elastically deformable portion along the hook's engaging direction. The slot includes a second engaging portion that adaptively abuts against one of the abutment surfaces.

[0012] As a preferred embodiment, the first included angle α1 formed by the contact surface and the horizontal plane is 0° to 30°.

[0013] As a preferred embodiment, the first snap-fit ​​portion further includes a connecting surface and a first top surface. The abutting surface, the connecting surface, and the first top surface are connected sequentially along the snap-fit ​​direction of the hook. The connecting surface and the first top surface intersect to form a first abutting structure.

[0014] The second snap-fit ​​portion includes a guide surface and a second top surface that are sequentially connected along the snap-fit ​​direction of the hook, and the guide surface and the second top surface intersect to form a second abutment structure;

[0015] When the first abutting structure slides along the guide surface, the elastic deformation portion undergoes elastic deformation so that the second abutting structure abuts against the abutting surface.

[0016] As a preferred embodiment, the guide surface includes a first guide surface and a second guide surface connected sequentially along the snap-in direction of the hook. The side of the second guide surface away from the first guide surface is connected to the second top surface. The first guide surface and the snap-in direction of the hook form a second angle α2, and the second guide surface and the snap-in direction of the hook form a third angle α3. The second angle α2 is greater than the third angle α3.

[0017] As a preferred embodiment, the end cap body includes a connecting ring, a connecting portion, and a plurality of supporting ribs. The supporting ribs are formed by extending from the connecting ring toward the midpoint of the connecting ring, and the end of the supporting rib away from the connecting ring is connected to the connecting portion.

[0018] As a preferred embodiment, the slots and hooks are configured in multiple sets, and the end cap plate is provided with receiving grooves corresponding to the support ribs. When the support ribs are located in the corresponding receiving grooves, the hooks engage with the corresponding slots.

[0019] As a preferred embodiment, the support ribs are provided in three ribs, which are spaced apart along the circumference of the connecting ring, and the lines connecting two adjacent support ribs to the midpoint of the connecting ring are arranged at a 90° angle.

[0020] As a preferred embodiment, the end cap body further includes a first connecting frame, which is connected to the connecting ring and the connecting part respectively, and the first connecting frame can be connected to the object to be connected.

[0021] As a preferred embodiment, the first connecting frame has a perforated hole.

[0022] As a preferred embodiment, the end cap body is integrally formed.

[0023] As a preferred embodiment, a bearing chamber is formed on the connecting portion, the bearing chamber is used to place the bearing, and a plurality of spaced first abutting portions are protruding from the second inner wall of the bearing chamber. A first abutting curved surface is formed on the side of the first abutting portion away from the second inner wall, and the first abutting curved surface abuts against the outer ring of the bearing.

[0024] As a preferred embodiment, the connecting ring includes:

[0025] The connecting ring body is connected to the supporting rib, and the interior of the connecting ring body is used to house the stator;

[0026] A second abutting portion protrudes from the first inner wall of the connecting ring body. A second abutting curved surface is formed on the side of the second abutting portion away from the first inner wall, and this curved surface abuts against the outer peripheral surface of the stator.

[0027] The third abutting part protrudes from the first inner wall, and the third abutting part has an abutting end face along the snapping direction of the hook, and the abutting end face abuts against the end face of the stator along the snapping direction of the hook.

[0028] As a preferred embodiment, the second abutment portion is provided in multiple parts, and the multiple second abutment portions are evenly distributed along the circumference of the connecting ring body.

[0029] As a preferred embodiment, the sum of the surface areas of the plurality of second abutting surfaces is the first surface area, the sum of the surface areas of the first inner walls between the second abutting portions is the second surface area, and the first surface area is 1 / 3 to 1 / 2 of the second surface area.

[0030] As a preferred embodiment, multiple second abutment portions are provided, with the multiple second abutment portions spaced apart. Each second abutment portion corresponds to one of the third abutment portions. The second abutment portion is located at the middle position of the third abutment portion along the circumference of the connecting ring body. The side of the third abutment portion away from the connecting ring body is closer to the center line of the connecting ring body than the second abutment surface. The abutment end face corresponding to the second abutment portion is recessed in the direction away from the stator to form a relief groove.

[0031] As a preferred embodiment, the second abutment portion further includes:

[0032] The third guide surface extends from the end face of the connecting ring body away from the third abutment portion along the snap-in direction of the hook to the end of the second abutment surface away from the third abutment portion along the snap-in direction of the hook.

[0033] As a preferred embodiment, the connecting ring further includes:

[0034] The first lug extends outward from the position where the supporting rib is located on the connecting ring body;

[0035] The first reinforcing rib, the first lug, and the supporting rib are connected through the first reinforcing rib.

[0036] As a preferred embodiment, the connecting ring further includes:

[0037] The second reinforcing rib connects the first lug and the connecting ring body.

[0038] Preferably, the connecting ring further includes:

[0039] The second lug extends outward from the position where the first connecting frame is located on the connecting ring body;

[0040] The third reinforcing rib, the second lug, and the first connecting frame are connected through the third reinforcing rib.

[0041] Preferably, the connecting ring further includes:

[0042] The fourth reinforcing rib connects the second lug and the connecting ring body.

[0043] Preferably, the engineering plastic is polypropylene, polybutylene terephthalate, or nylon.

[0044] An electric motor, including the motor end cover as described above.

[0045] A washing machine, comprising the motor described above.

[0046] The beneficial effects of this invention are as follows:

[0047] The motor end cover provided by this invention includes an end cover body and an end cover plate. The end cover body has a hollow structure, and the end cover plate is connected to the end cover body to cover the hollow structure. The end cover body is made of metal, and the end cover plate is made of engineering plastic. Firstly, the end cover plate covering the hollow structure of the metal end cover body is made of engineering plastic. Engineering plastic is lighter and less expensive than metal of the same volume, so the motor end cover of this invention is less expensive and lighter than a solid metal end cover. Furthermore, because the hollow structure is covered by the end cover plate, it effectively prevents other components or impurities in the working environment from entering the stator and rotor through the hollow structure, effectively preventing rotor jamming and ensuring normal motor operation. In addition, because the end cover plate effectively blocks the noise generated by the motor from escaping through the hollow structure, it ensures low motor noise during operation, achieving a better quiet operation effect. The engineering plastic used to manufacture the end cap plate of this invention has high rigidity and strength. Compared with traditional end caps with hollow structures, the motor end cap of this invention has higher strength and can achieve better support for the stator and rotor. In summary, the motor end cap provided by this invention is low in cost, lightweight, highly rigid, and strong, and can achieve good support for the stator and rotor. Motors using the motor end cap of this invention are low in cost, lightweight, structurally stable, and operate normally.

[0048] The motor and washing machine provided by this invention, by applying the above-mentioned motor end cover, can achieve the effects of low cost, small weight, stable structure, normal operation and good noise reduction. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of the structure of the motor provided in an embodiment of the present invention;

[0051] Figure 2 This is a cross-sectional view of the motor provided in an embodiment of the present invention;

[0052] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0053] Figure 4 This is a schematic diagram of the hook structure provided in an embodiment of the present invention;

[0054] Figure 5This is a schematic diagram of the structure of the second snap-fit ​​portion provided in an embodiment of the present invention;

[0055] Figure 6 This is a schematic diagram of the structure of the end cap plate provided in an embodiment of the present invention;

[0056] Figure 7 This is a top view of the end cap plate provided in an embodiment of the present invention;

[0057] Figure 8 This is a schematic diagram of the structure of the end cap body provided in an embodiment of the present invention;

[0058] Figure 9 This is a bottom view of the end cap body provided in an embodiment of the present invention.

[0059] The markings in the image are as follows:

[0060] 100-Motor end cover; 101-Front end cover; 1011-Second connecting frame; 1012-Front end cover body; 1013-Buffer component; 102-Rear end cover; 200-Bearing; 300-Stator; 400-Rotor; 401-Shaft; 500-Fixing component;

[0061] 1-End cap body; 11-Hollowed structure; 12-Slot; 121-Second snap-fit ​​part; 1211-First guide surface; 1212-Second guide surface; 1213-Second top surface; 13-Connecting ring; 131-Connecting ring body; 1311-First inner wall; 132-Second abutting part; 1321-Second abutting curved surface; 1322-Third guide surface; 133-Third abutting part; 1331-Abutting end face; 13311-Allowing groove; 1332-Side side; 134-First lug; 135-First reinforcing rib ; 136-Second reinforcing rib; 137-Second lug; 138-Third reinforcing rib; 139-Fourth reinforcing rib; 14-Connecting part; 141-Bearing chamber; 1411-Second inner wall; 142-First abutting part; 1421-First abutting curved surface; 15-Supporting rib; 16-First connecting frame; 161-Hollow hole; 2-End cover plate; 21-Hook; 211-Elastic deformation part; 212-First snap-fit ​​part; 2121-Abutting surface; 2122-First top surface; 2123-Connecting surface; 22-Accommodating groove. Detailed Implementation

[0062] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0063] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0066] This embodiment provides a washing machine, which includes a shell, an inner drum, and a motor. The inner drum is disposed inside the shell, the motor body is connected to the shell, and the output end of the motor is connected to the inner drum. The motor can drive the inner drum to rotate, thereby realizing the washing or spin-drying of the clothes inside the inner drum.

[0067] like Figures 1-2 As shown, the motor includes a motor end cover 100, a stator 300, a rotor 400, and a fixing member 500. The rotor 400 is disposed inside the stator 300 and can rotate relative to the stator 300. The rotor 400 includes a rotating shaft 401. The motor end cover 100 includes a front cover 101 and a rear cover 102. The front cover 101 is abutted against the front end face of the stator 300, and the rear cover 102 is abutted against the rear end face of the stator 300. The two ends of the fixing member 500 are respectively connected to the front cover 101 and the rear cover 102, thereby realizing that the motor end cover 100 is stably disposed on the outer periphery of the stator 300, thus realizing the good protective function of the motor end cover 100 for the stator 300.

[0068] Specifically, such as Figure 1 As shown, the rear cover 102 includes a first connecting frame 16, which is fixed to the housing. The front cover 101 includes a front cover body 1012, a second connecting frame 1011, and a buffer member 1013. The second connecting frame 1011 is disposed on the outer periphery of the front cover body 1012, and the buffer member 1013 is disposed on the second connecting frame 1011. The second connecting frame 1011 is fixed to the housing, and the buffer member 1013 is disposed between the second connecting frame 1011 and the housing, thus buffering the impact between the second connecting frame 1011 and the housing. By fixing the first connecting frame 16 and the second connecting frame 1011 to the housing respectively, a relatively stable fixation between the motor and the housing is achieved, which can effectively reduce the large vibration generated by the motor during operation and ensure a better quiet operation of the washing machine. As a preferred solution, in order to reduce the weight of the rear cover 102, such as Figure 1 As shown, the first connecting frame 16 has a hollow hole 161.

[0069] To reduce the amount of metal used in the end caps, the cost of the end caps can be reduced, and to reduce the weight of the motor, such as... Figure 1 As shown, a perforated structure 11 is provided on the end cover. However, other components or impurities in the working environment can still enter the stator 300 and rotor 400 through the perforated structure 11, causing the rotor 400 to jam and affecting the normal operation of the motor. In addition, the noise generated by the motor during operation will be transmitted through the perforated structure 11, resulting in high motor noise during operation.

[0070] To address the aforementioned issues, this embodiment provides a motor end cover 100, which includes a rear end cover 102. The rear end cover 102 includes an end cover body 1 and an end cover plate 2. The end cover body 1 has a perforated structure 11, and the end cover plate 2 is connected to the end cover body 1 to cover the perforated structure 11. The end cover body 1 is made of metal, and the end cover plate 2 is made of engineering plastic. First, the end cover plate 2 covering the perforated structure 11 of the metal end cover body 1 is made of engineering plastic. Engineering plastic has a smaller mass and lower cost than metal for the same volume. Therefore, the motor end cover 100 of this embodiment is less expensive and lighter than a solid metal end cover. Furthermore, since the perforated structure 11 is covered by the end cover plate 2, it effectively prevents other components or impurities in the working environment from entering the stator 300 and rotor 400 through the perforated structure 11, effectively preventing the rotor 400 from jamming and ensuring the normal operation of the motor. Furthermore, since the end cover plate 2 effectively blocks the noise generated by the motor from being transmitted through the hollow structure 11, it ensures low motor noise during operation and achieves a better quiet operation. In addition, the engineering plastic used to make the end cover plate 2 in this embodiment has high rigidity and strength. Compared with traditional end covers with hollow structures, the motor end cover 100 of this embodiment has higher strength and can provide better support for the stator 300 and rotor 400. In summary, the motor end cover 100 provided in this embodiment is low in cost, lightweight, rigid, and strong, and can provide good support for the stator 300 and rotor 400. Motors using the motor end cover 100 of this embodiment are low in cost, lightweight, structurally stable, and operate normally.

[0071] Specifically, the metal in this embodiment is aluminum alloy, zinc alloy, copper alloy, or stainless steel, etc.; the engineering plastic is polypropylene, polycarbonate, polybutylene terephthalate, nylon, etc. Of course, the structure of the rear cover 102 in this embodiment can also be applied to the front cover 101, which will not be described in detail in this embodiment.

[0072] A conventional rear end cover 102 includes a rear end cover body and a first connecting frame 16, which are fixed together by screws, resulting in low strength and poor vibration resistance of the assembled rear end cover 102. To solve the above problems, the end cover body 1 of this embodiment is integrally formed, thereby making the rear end cover 102 strong and with good vibration resistance.

[0073] To enable quick assembly and disassembly between the end cap body 1 and the end cap plate 2, such as Figure 1 and Figure 2As shown, the end cap body 1 is provided with a slot 12, and the end cap cover plate 2 is provided with a hook 21. The hook 21 is engaged in the slot 12, enabling quick assembly and disassembly of the end cap body 1 and the end cap cover plate 2. Of course, in other embodiments, the end cap body 1 can also be provided with a hook 21, and the end cap cover plate 2 can be provided with a slot 12, with the hook 21 engaging with the slot 12, which can also achieve the above effect.

[0074] Combination Figure 3 The structure of the hook 21 and the slot 12 will be described as follows: Figure 3 As shown, the hook 21 includes an elastic deformation part 211 and a first engaging part 212. One end of the elastic deformation part 211 is connected to the end cover plate 2, and the other end is provided with the first engaging part 212. The first engaging part 212 includes an abutting surface 2121. The slot 12 includes a second engaging part 121. The second engaging part 121 abuts against the abutting surface 2121, thereby realizing the engaging and fixing of the hook 21 and the slot 12.

[0075] However, in traditional snap hooks 21, the contact surface 2121 is parallel to the horizontal plane. Therefore, if there are processing errors in the end cap body 1 or the end cap plate 2, it may not be possible to ensure that all the first snap-fit ​​parts 212 effectively hook onto the second snap-fit ​​parts 121. This can lead to the end cap body 1 and the end cap plate 2 not being able to snap together, or the end cap plate 2 not being able to be installed onto the end cap body 1. To solve the above problems, such as... Figure 3 As shown, in this embodiment, the contact surface 2121 gradually extends outward from the elastic deformation portion 211 along the snapping direction (direction B) of the hook 21. The second snapping portion 121 adaptively abuts against one of the positions of the contact surface 2121. The snapping of the hook 21 and the slot 12 can achieve a certain degree of adaptive adjustment. Even if there are certain processing errors in the end cap body 1 or the end cap cover plate 2, the effective connection between the end cap body 1 and the end cap cover plate 2 can be guaranteed.

[0076] As a preferred option, such as Figure 4 As shown, the first included angle α1 formed by the contact surface 2121 and the horizontal plane is 0° to 30°. Under the premise of ensuring the adaptive adjustment of the latch 21 and the slot 12, since the angle α1 is not too large, it can effectively prevent the latch 21 from falling out of the slot 12, and ensure the stable engagement of the latch 21 and the slot 12.

[0077] To achieve the automatic locking function between the hook 21 and the slot 12, and to make the operation simple and convenient for the operator, such as... Figure 3As shown, the first locking part 212 also includes a connecting surface 2123 and a first top surface 2122. The abutting surface 2121, the connecting surface 2123, and the first top surface 2122 are sequentially connected along the locking direction of the hook 21. The connecting surface 2123 and the first top surface 2122 intersect to form a first abutting structure. The second locking part 121 includes a guide surface and a second top surface 1213 sequentially connected along direction B. The guide surface and the second top surface 1213 intersect to form a second abutting structure. When the first abutting structure slides along the guide surface, the elastic deformation part 211 undergoes elastic deformation, so that the second abutting structure abuts against the abutting surface 2121. The operator can achieve the automatic locking function between the hook 21 and the slot 12 with just a simple pushing action, effectively saving the operator's manpower.

[0078] As a preferred option, such as Figure 5 As shown, the guide surface includes a first guide surface 1211 and a second guide surface 1212 connected sequentially along direction B. The side of the second guide surface 1212 away from the first guide surface 1211 is connected to a second top surface 1213. The first guide surface 1211 and the snap-in direction of the hook 21 form a second angle α2, and the second guide surface 1212 and the snap-in direction of the hook 21 form a third angle α3. The second angle α2 is greater than the third angle α3. Figure 5 As shown, when the operator pushes the end cover plate 2 in direction B, the force applied to the end cover plate 2 by the operator is F along direction B. 推 The force applied by the first guide surface 1211 to the first latching portion 212 is F perpendicular to the first guide surface 1211. 压 F 压 The component of the force along direction B is F. 纵向＝ F 压 *sinα2, in order to achieve the pushing of the first locking part 212, F 推 ≥F 纵向 F 压 The horizontal component of the force is F. 横向 =F 压 *cosα2, where F 横向 Used to push the first locking part 212 so that the elastic deformation part 211 undergoes elastic deformation, F 弹性变形 ≤F 横向 =F 压 *Fcosα2=F 纵向 *cosα2 / sinα2≤F 推 *cotα2, thus obtaining F 推 With F 弹性变形 The relationship between F 推 ≥F 弹性变形 *tanα2. As the elastic deformation part 211 bends to the left, F 弹性变形As the bending of the elastic deformation section 211 increases, if α2 remains constant, the operator needs to increase F. 推 This makes it increasingly difficult for the operator to push the end cover plate 2. To solve this problem, the second included angle α2 is greater than the third included angle α3, so the operator can maintain F... 推 With the basic structure remaining unchanged, the end cover plate 2 can be pushed when the first snap-fit ​​part 212 is in the rear section of the guide surface, making the operation simple and convenient for the operator.

[0079] Combination Figure 1 , Figure 7 , Figure 8 and Figure 9 The specific structure of the end cap body 1 is described below, such as... Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, the end cap body 1 includes a connecting ring 13, a connecting portion 14, and multiple supporting ribs 15. The supporting ribs 15 extend from the connecting ring 13 toward the midpoint of the connecting ring 13, and one end of the supporting rib 15 away from the connecting ring 13 is connected to the connecting portion 14. Multiple sets of slots 12 and hooks 21 are provided, requiring the operator to spend considerable time aligning the hooks 21 with their corresponding slots 12, resulting in time-consuming locking of the slots 12 and hooks 21. To solve this problem, as... Figure 6 As shown, the end cover plate 2 is provided with a receiving groove 22 corresponding to the support rib 15. When the support rib 15 is located in the corresponding receiving groove 22, the hook 21 engages with the corresponding slot 12, which can realize the quick positioning of the hook 21 and the slot 12 and can play a good role in preventing mistakes.

[0080] Specifically, such as Figure 8 and Figure 9 As shown, there are three support ribs 15, which are spaced apart along the circumference of the connecting ring 13. The line connecting two adjacent support ribs 15 to the midpoint of the connecting ring 13 forms a 90° angle.

[0081] Combination Figure 2 and Figure 8 The structure of the connecting part 14 will be described as follows: Figure 2 and Figure 8As shown, a bearing chamber 141 is formed on the connecting part 14. The bearing chamber 141 is used to house the bearing 200, and the rotating shaft 401 of the rotor 400 passes through the inner ring of the bearing 200. The second inner wall 1411 of the bearing chamber 141 has a plurality of spaced first abutment parts 142 protruding from it. A first abutment surface 1421 is formed on the side of the first abutment part 142 away from the second inner wall 1411. The first abutment surface 1421 abuts against the outer ring of the bearing 200. Since the end cover body 1 is a die-cast part, the coaxiality of the whole annular curved surface formed by the die-cast part with the bearing 200 is poor. However, the forming accuracy of the first abutment surfaces 1421 with smaller circumferential dimensions formed separately is higher. The circle formed by the multiple segments of the first abutment surfaces 1421 has better coaxiality with the bearing 200.

[0082] Furthermore, the sum of the surface areas of the multiple first abutting surfaces 1421 constitutes the third surface area, and the sum of the surface areas of the second inner walls 1411 between the first abutting surfaces 1421 constitutes the fourth surface area. The third surface area is 1 / 3 to 1 / 2 of the fourth surface area. The operator only needs to perform finishing on the first abutting surfaces 1421, without needing to perform finishing on the entire circumference of the second inner wall 1411 of the bearing chamber 141. This reduces processing costs and improves the production efficiency of the rear end cover 102.

[0083] Combination Figure 8 The structure of the connecting ring 13 will be described as follows: Figure 8 As shown, the connecting ring 13 includes a connecting ring body 131 and a second abutting part 132. The connecting ring body 131 is connected to the support rib 15. The interior of the connecting ring body 131 is used to house the stator 300. The second abutting part 132 protrudes from the first inner wall 1311 of the connecting ring body 131. A second abutting curved surface 1321 is formed on the side of the second abutting part 132 away from the first inner wall 1311. The second abutting curved surface 1321 abuts against the outer peripheral surface of the stator 300. The second abutting curved surface 1321 can achieve the positioning of the stator 300 in the radial direction.

[0084] In addition, such as Figure 8 As shown, the connecting ring 13 also includes a third abutting part 133, which protrudes from the first inner wall 1311. The third abutting part 133 has an abutting end face 1331 along the B direction. The abutting end face 1331 abuts against the end face of the stator 300 along the B direction. The abutting end face 1331 can achieve positioning of the stator 300 in the axial direction.

[0085] like Figure 8 and Figure 9As shown, multiple second abutment portions 132 are provided, and the multiple second abutment portions 132 are evenly spaced along the circumference of the connecting ring body 131. Since the end cap body 1 is a die-cast part, the coaxiality of the entire annular curved surface formed by the die-cast part with the stator 300 is poor. However, the forming accuracy of the second abutment curved surfaces 1321 with smaller circumferential dimensions formed separately is higher, and the circle formed by multiple segments of the second abutment curved surfaces 1321 has better coaxiality with the stator 300.

[0086] Preferably, the sum of the surface areas of the plurality of second abutting surfaces 1321 is the first surface area, and the sum of the surface areas of the first inner walls 1311 between the second abutting portions 132 is the second surface area, with the first surface area being 1 / 3 to 1 / 2 of the second surface area. The operator only needs to perform finishing on the second abutting surfaces 1321, without needing to perform finishing on the entire circumference of the first inner wall 1311 of the connecting ring body 131, which can reduce processing costs and improve the production efficiency of the rear end cover 102.

[0087] like Figure 8 and Figure 9 As shown, multiple third abutment portions 133 are provided, and these multiple third abutment portions 133 are evenly spaced along the circumference of the connecting ring body 131. Each third abutment portion 133 corresponds to a second abutment portion 132. Along the circumference of the connecting ring body 131, the second abutment portion 132 is located in the middle of the third abutment portion 133. The side 1332 of the third abutment portion 133 away from the connecting ring body 131 is closer to the centerline of the connecting ring body 131 than the second abutment surface 1321. Since both the abutment end face 1331 and the second abutment surface 1321 require precision machining, there will be a chamfer at the connection position of the abutment end face 1331 and the second abutment surface 1321. This will affect the high-precision abutment between the stator 300 and the abutment end face 1331 and the second abutment surface 1321, thereby affecting the positioning effect of the stator 300 in the radial and circumferential directions. To solve the above problems, as Figure 8 As shown, the abutting end face 1331 and the second abutting part 132 are recessed in the direction away from the stator 300 to form a relief groove 13311, which can avoid the presence of a chamfer at the connection position of the abutting end face 1331 and the second abutting curved surface 1321, and can ensure that the stator 300 abuts with the abutting end face 1331 and the second abutting curved surface 1321 with high precision, thereby achieving a better positioning effect of the stator 300 in the radial and circumferential directions.

[0088] As a preferred option, such as Figure 8As shown, the second abutment portion 132 also includes a third guide surface 1322. The third guide surface 1322 extends from the end face of the connecting ring body 131 away from the third abutment portion 133 along the B direction to one end of the second abutment surface 1321 away from the third abutment portion 133 along the B direction. The stator 300 can gradually achieve abutment between the outer peripheral surface of the stator 300 and the second abutment surface 1321 along the third guide surface 1322, thereby achieving a simple and quick positioning effect for the stator 300 and the end cover body 1.

[0089] As a preferred option, such as Figure 8 As shown, the connecting ring 13 also includes a first lug 134, a first reinforcing rib 135, and a second reinforcing rib 136. The first lug 134 extends outward from the position where the supporting rib 15 is located on the connecting ring body 131. The first lug 134 and the supporting rib 15 are connected by the first reinforcing rib 135, and the first lug 134 and the connecting ring body 131 are connected by the second reinforcing rib 136. During the installation or use of the motor, the connecting ring 13 experiences greater stress at the position of the first lug 134, thus providing better support for the supporting rib 15 and ensuring its strength.

[0090] As a preferred option, such as Figure 8 As shown, the connecting ring 13 also includes a second lug 137, a third reinforcing rib 138, and a fourth reinforcing rib 139. The second lug 137 extends outward from the position where the first connecting frame 16 is located on the connecting ring body 131. The second lug 137 and the first connecting frame 16 are connected by the third reinforcing rib 138, and the second lug 137 and the connecting ring body 131 are connected by the fourth reinforcing rib 139. During the installation or use of the motor, the connecting ring 13 experiences greater stress at the position of the second lug 137, providing better support for the first connecting frame 16 and ensuring its strength.

[0091] Note that the foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor end cover, characterized in that, It includes an end cap body (1) and an end cap cover plate (2). The end cap body (1) is provided with a hollow structure (11). The end cap cover plate (2) is connected to the end cap body (1) to cover the hollow structure (11). The end cap body (1) is made of metal and the end cap cover plate (2) is made of engineering plastic. One of the end cap body (1) and the end cap cover plate (2) is provided with a slot (12), and the other is provided with a hook (21), and the hook (21) is engaged in the slot (12); The hook (21) includes an elastic deformation part (211) and a first engaging part (212). One end of the elastic deformation part (211) is connected to the end cap body (1) or the end cap cover plate (2), and the other end is provided with the first engaging part (212). The first engaging part (212) includes an abutment surface (2121). The abutment surface (2121) gradually extends outward from the elastic deformation part (211) along the engaging direction of the hook (21). The slot (12) includes a second engaging part (121). The second engaging part (121) adaptively abuts against one of the positions of the abutment surface (2121). The first included angle α1 formed between the contact surface (2121) and the horizontal plane is 0° to 30°; The first snap-fit ​​part (212) further includes a connecting surface (2123) and a first top surface (2122). The abutting surface (2121), the connecting surface (2123) and the first top surface (2122) are connected sequentially along the snap-fit ​​direction of the hook (21). The connecting surface (2123) and the first top surface (2122) intersect to form a first abutting structure. The second snap-fit ​​portion (121) includes a guide surface and a second top surface (1213) that are sequentially connected along the snap-fit ​​direction of the hook (21), and the guide surface and the second top surface (1213) intersect to form a second abutment structure; When the first abutting structure slides along the guide surface, the elastic deformation part (211) undergoes elastic deformation so that the second abutting structure abuts against the abutting surface (2121); The guide surface includes a first guide surface (1211) and a second guide surface (1212) connected sequentially along the snap-in direction of the hook (21). The side of the second guide surface (1212) away from the first guide surface (1211) is connected to the second top surface (1213). The first guide surface (1211) and the snap-in direction of the hook (21) form a second angle α2, and the second guide surface (1212) and the snap-in direction of the hook (21) form a third angle α3. The second angle α2 is greater than the third angle α3.

2. The motor end cover according to claim 1, characterized in that, The end cap body (1) includes a connecting ring (13), a connecting part (14) and a plurality of supporting ribs (15). The supporting ribs (15) are formed by extending from the connecting ring (13) toward the midpoint of the connecting ring (13). One end of the supporting rib (15) away from the connecting ring (13) is connected to the connecting part (14). The slot (12) and the hook (21) are set in multiple sets. The end cover plate (2) is provided with a receiving groove (22) corresponding to the support rib (15). When the support rib (15) is located in the corresponding receiving groove (22), the hook (21) is engaged with the corresponding slot (12). The support ribs (15) are set to three, and the three support ribs (15) are arranged at intervals along the circumference of the connecting ring (13). The lines connecting two adjacent support ribs (15) to the midpoint of the connecting ring (13) are respectively arranged at a 90° angle. The end cap body (1) further includes a first connecting frame (16), which is connected to the connecting ring (13) and the connecting part (14) respectively, and the first connecting frame (16) can be connected to the object to be connected; The first connecting frame (16) has a hollow hole (161); The end cap body (1) is integrally formed; The connecting ring (13) includes: The connecting ring body (131) is connected to the support rib (15), and the interior of the connecting ring body (131) is used to set the stator (300); A second abutting portion (132) protrudes from the first inner wall (1311) of the connecting ring body (131). A second abutting curved surface (1321) is formed on the side of the second abutting portion (132) away from the first inner wall (1311), and the second abutting curved surface (1321) abuts against the outer peripheral surface of the stator (300). The third abutting part (133) protrudes from the first inner wall (1311). The third abutting part (133) has an abutting end face (1331) along the snapping direction of the hook (21). The abutting end face (1331) abuts against the end face of the stator (300) along the snapping direction of the hook (21). The second abutment (132) is provided in multiple ways, and the multiple second abutment (132) are evenly spaced along the circumference of the connecting ring body (131); The sum of the surface areas of the plurality of second abutting surfaces (1321) is the first surface area, and the sum of the surface areas of the first inner wall (1311) between the second abutting portions (132) is the second surface area. The first surface area is 1 / 3 to 1 / 2 of the second surface area. The second abutment (132) is provided in multiples, and the multiple second abutment (132) are spaced apart. Each second abutment (132) corresponds to a third abutment (133). The second abutment (132) is located at the middle position of the third abutment (133) along the circumference of the connecting ring body (131). The side (1332) of the third abutment (133) away from the connecting ring body (131) is closer to the center line of the connecting ring body (131) than the second abutment surface (1321). The abutment end face (1331) corresponding to the second abutment (132) is recessed in the direction away from the stator (300) to form a relief groove (13311). The second contact portion (132) also includes: The third guide surface (1322) extends from the end face of the connecting ring body (131) away from the third abutment portion (133) along the snap-in direction of the hook (21) to the end of the second abutment surface (1321) away from the third abutment portion (133) along the snap-in direction of the hook (21); The connecting ring (13) also includes: The first lug (134) is formed by extending outward from the position where the supporting rib (15) is located on the connecting ring body (131); The first reinforcing rib (135), the first lug (134), and the supporting rib (15) are connected by the first reinforcing rib (135); and The second reinforcing rib (136) connects the first lug (134) and the connecting ring body (131). The connecting ring (13) also includes: The second lug (137) is formed by extending outward from the position where the first connecting frame (16) is located on the connecting ring body (131); The third reinforcing rib (138), the second lug (137) and the first connecting frame (16) are connected by the third reinforcing rib (138); The fourth reinforcing rib (139), the second lug (137), and the connecting ring body (131) are connected by the fourth reinforcing rib (139).

3. The motor end cover according to claim 2, characterized in that, A bearing chamber (141) is formed on the connecting part (14). The bearing chamber (141) is used to place the bearing (200). The second inner wall (1411) of the bearing chamber (141) is provided with a plurality of spaced first abutting parts (142). A first abutting surface (1421) is formed on the side of the first abutting part (142) away from the second inner wall (1411). The first abutting surface (1421) abuts against the outer ring of the bearing (200).

4. The motor end cover according to any one of claims 1 to 3, characterized in that, The engineering plastic is polypropylene, polybutylene terephthalate, or nylon.

5. An electric motor, characterized in that, Includes the motor end cap as described in any one of claims 1 to 4.

6. A washing machine, characterized in that, Includes the motor as described in claim 5.

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