Motor casing, drainage pump using same and washing equipment

Abstract

The utility model discloses a motor casing and a draining pump and washing equipment using the motor casing. The motor casing comprises an outer casing body which is integrally formed by injection molding and a mounting bracket which is arranged on the outer side wall of the outer casing body, the installation support comprises a base body part connected with the outer shell and an external connection part used for being connected with external equipment. At least two fastening connecting holes are formed in the outer connecting part; and an injection molding pressure reducing groove hole is also formed in the mounting bracket. According to the mounting bracket of the motor shell, the cost can be reduced on the basis of satisfying the structural strength and the long-term use stability.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage devices, in particular to a motor housing and a drainage pump and washing equipment using the same. Background Art

[0002] Many modern washing machines, such as washing machines and dishwashers, require drainage devices. Considering that the drainage device and the corresponding washing machine need to be assembled together so that the drainage device can be securely fixed to the washing machine, it is necessary to provide an additional mounting bracket on the outer shell of the drainage device. For example, the drainage pump and air conditioner including the drainage pump disclosed in Publication No. CN205956064U have a detachable mounting plate on the motor housing. Another example is the high-flow acid and alkali-resistant washing liquid dishwasher drainage pump disclosed in Publication No. CN215672735U, which also has a mounting bracket on the motor housing of the drainage pump.

[0003] The mounting plates and mounting brackets commonly used in the aforementioned disclosed technologies are generally made of metal to ensure the reliability of the connection structure between the drain device and the washing machine. Using a metal motor housing would increase production costs and the overall weight of the drain pump. In this case, if the metal mounting bracket is assembled with the injection-molded motor housing, when the motor housing and the mounting bracket are fastened together using, for example, screws, the metal and plastic parts squeeze against each other under the action of the screws, potentially causing damage to the motor housing. If a plastic mounting plate is used, research has found that the plastic mounting plate bears the connection function between the drain device and the washing machine. Therefore, to ensure a reliable connection between the plastic mounting plate and the motor housing and the washing machine, the mounting plate's fastening connection may deform due to stress. Furthermore, with long-term use of the washing machine, the connection between the motor housing and the mounting plate may become loose, causing noise during use of the drain device.

[0004] Therefore, in view of the problems existing in the connection structure between the drainage pump and the washing equipment used in the prior art, its structure needs to be further optimized. Utility Model Content

[0005] The first purpose of the utility model is to provide a motor housing to solve the technical problem of optimizing the overall structure of the motor housing.

[0006] The second object of the present utility model is to provide a drainage pump to solve the technical problem of optimizing the overall structure of the motor housing of the drainage pump.

[0007] The third object of the present utility model is to provide a washing device to solve the technical problem of optimizing the connection structure between the washing device and the drainage pump.

[0008] The motor housing of the present invention is realized as follows:

[0009] A motor housing comprises at least: an outer shell formed by integral injection molding and a mounting bracket located on the outer side wall of the outer shell;

[0010] The mounting bracket includes a base portion connected to the outer shell, and an external connection portion for connecting to an external device; the external connection portion is provided with at least two fastening connection holes; and

[0011] The mounting bracket is also formed with an injection-molded decompression slot.

[0012] In an optional implementation of the present invention, the external connection portion is bent relative to the base portion so that the mounting bracket is L-shaped.

[0013] In an optional embodiment of the present invention, the external connection portion extends along the axial direction of the rotor assembly of the motor;

[0014] The depth of the injection molding decompression slot along the axial direction of the rotor assembly is no more than half the length of the outer connecting portion along the axial direction of the rotor assembly.

[0015] In an optional embodiment of the present invention, a pair of side reinforcement plates are further provided between the base portion and the external connection portion; the pair of side reinforcement plates are respectively located on both sides of the corner formed by the base portion and the external connection portion; and

[0016] Each of the side reinforcing plates extends to the outer side wall of the outer shell.

[0017] In an optional embodiment of the present invention, the external connection portion is further provided with at least two nut grooves corresponding to the at least two fastening connection holes; each of the nut grooves is suitable for interference fit with a nut; and

[0018] Each of the nut slots has a slot opening suitable for inserting and removing a nut.

[0019] In an optional implementation of the present invention, the external connection portion is provided with two fastening connection holes and two nut grooves; and

[0020] A spacer portion is formed between the two nut grooves; a through hole communicating with the injection molding decompression slot hole is formed in the spacer portion.

[0021] The drainage pump of the present utility model is realized as follows:

[0022] A drainage pump comprises: a motor and a pump body used in conjunction with each other; wherein the motor comprises at least the motor housing, and a stator assembly and a rotor assembly arranged in a cavity of the motor housing;

[0023] The pump body at least comprises a pump housing for connecting to the outer housing of the motor housing;

[0024] The outer shell and the pump shell are respectively provided with screw holes for matching fastening screws.

[0025] In an optional implementation of the present invention, a convex column is provided on the side end surface of the outer shell facing away from the pump housing, and the screw hole extends from the outer shell into the convex column.

[0026] In an optional implementation of the present invention, a supporting connecting arm is provided between the outer side wall of the boss, the outer connecting portion and the outer shell.

[0027] The washing equipment of the present invention is realized as follows:

[0028] A washing device comprises: the drainage pump described above.

[0029] By adopting the above-described technical solution, the present invention has the following beneficial effects: The motor housing, drainage pump, and washing machine utilizing the same are integrally injection-molded with the outer housing and mounting bracket, simplifying the manufacturing process and reducing material costs while also lowering the overall product weight. Furthermore, this integral molding ensures a reliable connection between the mounting bracket and the outer housing, enhancing the mounting bracket's structural strength and avoiding the potential for loosening of the outer housing and mounting bracket over long-term use, which can increase motor operating noise and is a common problem with detachable structures. Consequently, the mounting bracket of this embodiment achieves both structural strength and long-term stability while also reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the motor housing of the present invention from a first perspective;

[0031] Figure 2 This is a schematic structural diagram of the motor housing of the present invention from a second perspective;

[0032] Figure 3 This is a schematic structural diagram of the motor housing of the present invention from a third perspective;

[0033] Figure 4 This is a schematic structural diagram of the motor housing of the present invention from a fourth perspective;

[0034] Figure 5 This is a schematic structural diagram of the motor housing of the present invention from a fifth perspective;

[0035] Figure 6 This is a partial structural diagram of the drainage pump of the present utility model;

[0036] Figure 7 This is a schematic diagram of the overall structure of the drainage pump of the present invention.

[0037] In the figure: outer shell 1, cavity shell 11, annular fitting part 12, mounting bracket 2, base part 21, external connection part 22, fastening connection hole 23, injection molding decompression slot hole 24, side reinforcement plate 25, nut slot 26, spacer part 27, through hole 28, rotor assembly 3, stator assembly 4, pump housing 5, screw hole 6, boss 7, support connecting arm 8. DETAILED DESCRIPTION

[0038] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0039] Example 1:

[0040] See also Figures 1 to 5 As shown, this embodiment provides a motor housing, comprising at least: an outer shell 1 formed by integral injection molding, and a mounting bracket 2 located on the outer side wall of the outer shell 1. For example, the mounting bracket 2 and the outer shell 1 of this embodiment can be injection molded using, for example, but not limited to, PP G30 HB material, which has high toughness and can effectively mitigate damage caused by screw tightening, preventing unnecessary crushing.

[0041] It should be noted that the outer shell 1 of this embodiment can be a complete shell corresponding to the motor, for example, a whole shell that accommodates the stator assembly 4 and the rotor assembly 3 of the motor, or it can be a partial shell that is only used to support the rotor assembly 3 but does not accommodate the stator assembly 4 as a whole. This embodiment does not make an absolute limitation on this.

[0042] As an example of an optional scenario, referenced in conjunction with the accompanying drawings, the outer housing 1 in this embodiment is merely a portion of the housing used to support the rotor assembly 3. It generally comprises a cavity housing 11 that accommodates the rotor assembly 3 and an annular mating portion 12 located along one axial side of the rotor assembly 3 and at one end of the cavity housing 11. This annular mating portion 12 is used to connect to the pump body when the motor housing is used in a drainage pump. Therefore, the mounting bracket 2 of this embodiment can theoretically be connected to either the cavity housing 11 or the annular mating portion 12. This embodiment, referenced in conjunction with the accompanying drawings, only illustrates the case where the mounting bracket 2 is integrally connected to the annular mating portion 12.

[0043] Specifically, the mounting bracket 2 includes a base portion 21 connected to the annular mating portion 12 of the outer housing 1, and an external connection portion 22 for connecting to an external device. The external connection portion 22 is provided with at least two fastening holes 23. For example, when the motor housing of this embodiment is used in a drain pump, the external device can be a washing machine or dishwasher that utilizes the drain pump. The fastening holes 23 are designed to secure the drain pump, which utilizes the motor housing of this embodiment, to the washing machine.

[0044] Based on the above situation, it should be noted that, for the approximate shape of the overall structure formed by the base portion 21 and the external connection portion 22 of this embodiment, combined with the installation requirements of different washing equipment, in theory it can be a straight-line structure, an L-shaped structure, or a structure of other shapes, and this embodiment does not make an absolute limitation on this.

[0045] In this embodiment, the mounting bracket 2, which is commonly used in the prior art, is illustrated with reference to the accompanying drawings. Specifically, the outer connecting portion 22 is bent relative to the base portion 21 to form the mounting bracket 2 in an L-shape. In this case, the outer connecting portion 22 can be understood to extend substantially along the axial direction of the motor rotor assembly 3. Further exemplified with reference to the accompanying drawings, both the base portion 21 and the outer connecting portion 22 can be relatively regular, such as a rectangular parallelepiped. Regular shapes facilitate machining.

[0046] Based on the above structure, the mounting bracket 2 of this embodiment is further formed with an injection-molded pressure relief slot 24. The injection-molded pressure relief slot 24 can be shaped as a rectangular parallelepiped. The injection-molded pressure relief slot 24 is primarily formed in the external connection portion 22. Preferably, the depth of the injection-molded pressure relief slot 24 along the axial direction of the rotor assembly 3 is no greater than half the length of the external connection portion 22 along the axial direction of the rotor assembly 3.

[0047] This embodiment, through the design of the injection molding decompression slot 24, makes it easy to control the overall size of the mounting bracket 2 during injection molding of the mounting bracket 2, and prevents poor injection molding and poor structural dimensions caused by excessive wall thickness. Furthermore, the external device is tightly matched with the mounting bracket 2. When the motor using this motor housing is started, resonance may occur with the external device. The hollow spacing design can effectively reduce the impact of the resonance phenomenon on the motor compared to solid plastic parts, reduce the pressure on the motor as a whole, and increase the stability of the overall operation of the motor. In addition, when the motor is connected to the external device through the mounting bracket 2, the motor is started, and the shaking may cause the fastening connection hole 23 of the mounting bracket 2 to continuously hit the external device. The injection molding decompression slot 24 can effectively buffer the back shock, thereby reducing the mechanical noise during the long-term operation of the motor.

[0048] In addition, in order to improve the structural strength of the overall mounting bracket 2 and prevent the possibility of deformation during long-term use, a pair of side reinforcement plates 25 are provided between the base portion 21 and the external connection portion 22; the pair of side reinforcement plates 25 are respectively located on both sides of the corner formed by the base portion 21 and the external connection portion 22.

[0049] Based on the above structure, that is, the base portion 21, the external connection portion 22 and a pair of side reinforcement plates 25 together form a mounting bracket 2 with a triangular cross-section. In this way, on the one hand, the material cost is reduced while taking into account the fact that the strength of the mounting bracket 2 can meet the standards. On the other hand, a certain space is formed on the inner side of the corner between the base portion 21 and the external connection portion 22. This space can be used to set other structures, so that the design of the mounting bracket 2 does not affect the design of other structures of the motor housing. In the optional case here, each side reinforcement plate 25 extends to the outer side wall of the annular fitting portion of the outer shell 1, thereby forming a bonding force between the side reinforcement plate 25 and the annular fitting portion of the outer shell 1, which can improve the deformation resistance of the overall mounting bracket 2.

[0050] Next, it should be explained that the external connection portion 22 is also provided with at least two nut slots 26 corresponding one to one to at least two fastening holes 23; each nut slot 26 is suitable for interference fit with a nut; and each nut slot 26 has a slot opening suitable for inserting and removing a nut. Under this structure, for the nut assembled into the nut slot 26, the nut and the corresponding fastening hole 23 are coaxially distributed. In order to meet the requirement that the nut slot 26 is suitable for interference fit with the nut, the nut is interference-pressed into the nut slot 26 by riveting it into place with a tool, and the nut is interference-pressed into the nut slot 26, which reduces the nut loss caused by motor vibration, increases the service life of the nut, and indirectly increases the service life of the motor.

[0051] Here, an example of a specific optional embodiment is shown in conjunction with the accompanying drawings. The outer connecting portion 22 is provided with two fastening holes 23 and two nut slots 26. A spacer 27 is formed between the two nut slots 26. A through hole 28 is formed within the spacer 27 and communicates with the injection molding pressure relief slot 24. The provision of through hole 28 prevents deformation of the nut slot 26 during the injection molding process, thereby preventing dimensional defects.

[0052] In summary, for the motor housing of this embodiment, the outer shell 1 and the mounting bracket 2 are integrally injection molded, which not only simplifies the processing steps, but also reduces material costs and the weight of the overall product. Furthermore, this integral processing forms a reliable connection between the mounting bracket 2 and the outer shell 1, reinforces the structural strength of the mounting bracket 2, and improves the stability of the mounting bracket 2 during long-term use. It also avoids the problem of loose fit between the outer shell 1 and the mounting bracket 2 due to long-term use, which may increase the noise level during motor operation, as is the case with detachable structures. As a result, the mounting bracket 2 of this embodiment can meet structural strength requirements while also reducing costs.

[0053] Example 2:

[0054] See also Figures 1 to 7As shown, based on the motor housing of Example 1, this embodiment provides a drainage pump, comprising: a motor and a pump body used in conjunction with each other; wherein the motor comprises at least the motor housing of Example 1, and a stator assembly 4 and a rotor assembly 3 disposed in a cavity of the motor housing. wherein the pump body comprises at least a pump housing 5 for connecting to the outer shell 1 of the motor housing.

[0055] For example, to facilitate processing, the motor and pump body of this embodiment are fastened together by screws between the outer motor housing and the pump housing 5 of the pump body. To meet assembly requirements, screw holes 6 for receiving fastening screws are provided on the outer housing 1 and the pump housing 5, respectively. In this regard, it should be noted that, in combination with the actual situation of the outer housing 1 of a general motor housing, from the perspective of saving material costs, the thickness dimension of its annular mating portion along the axial direction of the rotor assembly 3 will not be particularly thick. At this time, if the thickness of the annular mating portion is solely used to meet the depth requirement of the screw hole 6, the fastening effect may not be guaranteed. To this end, this embodiment provides a boss 7 on the side end surface of the outer housing 1 facing away from the pump housing 5, and the screw hole 6 extends from the outer housing 1 to the boss 7. In this way, by controlling the length of the boss 7 along the axial direction of the rotor assembly 3 to meet the depth requirement of the screw hole 6, the purpose of saving material costs can be achieved while also taking into account the fastening strength between the outer housing 1 of the motor and the pump body.

[0056] On the basis of the above structure, an optional implementation is given in conjunction with the accompanying drawings, in which a support connecting arm 8 is provided between the outer wall of the boss 7 and the annular matching portion of the external connection portion 22 and the outer shell 1. In a preferred case, two support connecting arms 8 are provided between the outer wall of the boss 7 and the annular matching portion of the external connection portion 22 and the outer shell 1. Each support connecting arm 8 can be L-shaped. Since the support connecting arm 8 here simultaneously connects the boss 7, the annular matching portion of the outer shell 1 and the external connection portion 22 of the mounting bracket 2, it can not only strengthen the structural stability of the boss 7 itself, but also strengthen the matching structure formed between the external connection portion 22 and the outer shell 1. In addition, combined with the design of the injection-molded decompression slot 24, the side reinforcement plate 25 and the support connecting arm 8 share the resonance pressure generated when the motor is running, reduce the pressure on the two nut slots 26, and increase the stability of the motor.

[0057] In summary, for the drainage pump of this embodiment, for the fastening structure formed between the motor and the pump body, the assembly process can be simplified while taking into account the stability of the formed connection structure, thereby reducing production costs.

[0058] Example 3:

[0059] Based on the drainage pump of Example 2, this embodiment provides a washing device, including: the drainage pump of Example 2. The mounting bracket 2 of the drainage pump is used to connect to the washing device, which may be, for example but not limited to, a dishwasher and a washing machine.

[0060] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0061] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0062] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0063] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0064] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0065] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A motor housing, characterized in that: At least: An outer shell formed by integral injection molding and a mounting bracket located on the outer side wall of the outer shell; in The mounting bracket includes a base portion connected to the outer shell, and an external connection portion for connecting to an external device; the external connection portion is provided with at least two fastening connection holes; and The mounting bracket is also formed with an injection-molded decompression slot.

2. The motor housing according to claim 1, characterized in that: The outer connecting portion is bent relative to the base portion so that the mounting bracket is in an L-shape.

3. The motor housing according to claim 2, characterized in that: The outer connecting portion extends along the axial direction of the rotor assembly of the motor; The depth of the injection molding decompression slot along the axial direction of the rotor assembly is no more than half the length of the outer connecting portion along the axial direction of the rotor assembly.

4. The motor housing according to claim 2 or 3, characterized in that: A pair of side reinforcement plates are further provided between the base portion and the external connection portion; the pair of side reinforcement plates are respectively located on both sides of the corner formed by the base portion and the external connection portion; and Each of the side reinforcing plates extends to the outer side wall of the outer shell.

5. The motor housing according to claim 1, characterized in that: The outer connection portion is further provided with at least two nut grooves corresponding to the at least two fastening connection holes; each of the nut grooves is suitable for interference fit with a nut; and Each of the nut slots has a slot opening suitable for inserting and removing a nut.

6. The motor housing according to claim 5, characterized in that: The outer connection portion is provided with two fastening connection holes and two nut grooves; and A spacer portion is formed between the two nut grooves; a through hole communicating with the injection molding decompression slot hole is formed in the spacer portion.

7. A drainage pump, characterized in that: include: Motor and pump body used in conjunction with each other; in The motor comprises at least a motor housing according to any one of claims 1 to 6, and a stator assembly and a rotor assembly disposed in a cavity of the motor housing; The pump body at least comprises a pump housing for connecting to the outer housing of the motor housing; The outer shell and the pump shell are respectively provided with screw holes for matching fastening screws.

8. The drainage pump according to claim 7, characterized in that: A convex column is provided on the side end surface of the outer shell facing away from the pump shell, and the screw hole extends from the outer shell into the convex column.

9. The drainage pump according to claim 8, characterized in that A supporting connecting arm is provided between the outer side wall of the boss, the outer connecting portion and the outer shell.

10. A washing device, characterized in that: include: A drainage pump according to any one of claims 7 to 9.

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