Motor and washing pump with same

Abstract

The utility model discloses a motor and a washing pump with the same. The motor comprises a motor shell, a motor rotor and a friction bearing. A liquid lubrication cooling cavity and a bearing chamber located at one end of the liquid lubrication cooling cavity are arranged in the motor shell, and the motor shell is provided with a water distribution disc flow channel communicated with the liquid lubrication cooling cavity and the outside. And the motor rotor is arranged in the liquid lubrication cooling cavity. The motor rotor is provided with a motor shaft penetrating in the axial direction of the motor rotor. The friction bearing is arranged in the bearing chamber and sleeves the motor shaft. And a bearing chamber runner communicated with the liquid lubrication cooling cavity is arranged between the bearing chamber and the friction bearing. The section of the friction bearing in the axial direction is H-shaped, the buffer piece is arranged on the friction bearing, the radial size of the middle of the friction bearing is smaller than that of the two ends of the friction bearing, the section of the friction bearing in the axial direction is H-shaped, the buffer piece is difficult to loosen from the friction bearing, the running stability of the motor is improved, and the failure rate is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of dishwasher accessories, and in particular to a motor and a washing pump having the same. Background Technology

[0002] With the development of brushless motors, especially their promotion and application in the field of household appliances, brushless motors are highly recognized for their advantages such as high power density and high efficiency. The brushless motor industry has experienced rapid growth in recent years, and many processes still need improvement.

[0003] In existing technologies, such as the bearing cross-section in a brushless motor, the buffer component is T-shaped and is prone to slipping out. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a motor and a washing pump incorporating the motor, which can prevent the cushioning component from easily slipping off.

[0005] This utility model also proposes a washing pump having one of the above-mentioned motors.

[0006] An electric motor according to a first aspect of the present invention includes a motor housing, wherein a liquid lubrication cooling chamber and a bearing chamber are disposed within the motor housing, and the motor housing has a water distribution plate channel communicating with the liquid lubrication cooling chamber and the outside; a motor rotor disposed within the liquid lubrication cooling chamber, the motor rotor having a motor shaft passing through it axially, one end of the motor shaft extending into the bearing chamber, and the other end of the motor shaft passing through the motor housing and rotatably connected thereto and extending outward; a friction bearing disposed within the bearing chamber and sleeved on the motor shaft, a bearing chamber channel communicating with the liquid lubrication cooling chamber is provided between the bearing chamber and the friction bearing, the bearing chamber channel extending axially along the bearing chamber; the friction bearing has an H-shaped cross-section along its axial direction, and a buffer is provided between the outer wall surface of the friction bearing and the inner wall surface of the bearing chamber; and a water distribution plate extending radially outward along the motor shaft, the outer periphery of the water distribution plate being adapted and snapped into the motor housing, and the water distribution plate having a water distribution plate channel within it.

[0007] It has at least the following beneficial effects: the cross-section of the friction bearing along the axial direction is H-shaped, the buffer is set on the friction bearing, and the radial dimension of the middle part of the friction bearing is smaller than the radial dimensions of the two ends, so that its cross-section along the axial direction is H-shaped. This makes it difficult for the buffer to detach from the friction bearing, improves the stability of motor operation, and reduces the failure rate.

[0008] According to some embodiments of the present invention, the buffer is annular and is sleeved at the position where the radial dimension of the friction bearing is smallest.

[0009] According to some embodiments of this utility model, the friction bearing is made of polytetrafluoroethylene or graphite.

[0010] According to some embodiments of the present invention, the friction bearing is provided with a plurality of bearing chamber flow channels.

[0011] According to some embodiments of this utility model, the bearing chamber flow channel is two.

[0012] According to some embodiments of this utility model, the bottom surface of the bearing chamber flow channel is an arc surface.

[0013] According to some embodiments of the present invention, an axial stop ring is provided between the friction bearing and the motor rotor, and the axial stop ring is sleeved on the motor shaft.

[0014] According to some embodiments of the present invention, a water groove is provided on the axial stop ring.

[0015] A washing pump according to a second aspect of the present invention includes a motor according to the first aspect of the present invention described above.

[0016] It has at least the following beneficial effects: a washing pump has all the beneficial effects brought about by the above-mentioned motor, which will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the water distribution plate in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the friction bearing according to an embodiment of the present invention;

[0022] Figure 4 This is a side view of the friction bearing according to an embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of the friction bearing according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the axial stop ring in an embodiment of the present invention. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 this utility model.

[0026] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Reference Figures 1 to 6 This utility model discloses an electric motor, including a motor housing 10, a motor rotor 20, and a friction bearing 30. The motor housing 10 is provided with a liquid lubrication cooling chamber 11 and a bearing chamber 12 located at one end of the liquid lubrication cooling chamber 11. The motor housing 10 has a water distribution channel 13 that connects the liquid lubrication cooling chamber 11 and the outside.

[0029] The motor rotor 20 is housed within the liquid lubrication and cooling chamber 11. The motor rotor 20 has a motor shaft 21 that passes through it axially. One end of the motor shaft 21 extends into the bearing chamber 12. The other end of the motor shaft 21 passes through the motor housing 10, is rotatably connected to it, and extends outward.

[0030] The friction bearing 30 is disposed within the bearing housing 12 and sleeved on the motor shaft 21. A bearing housing flow channel 31, which communicates with the liquid lubrication cooling chamber 11, is provided between the bearing housing 12 and the friction bearing 30. The bearing housing flow channel 31 extends axially along the bearing housing 12.

[0031] Under the drive of the pump, the medium outside the motor housing 10 enters the liquid lubrication cooling chamber 11 through the water distribution plate channel 13. The motor rotor 20 rotates in the liquid lubrication cooling chamber 11 filled with cooling medium. The cooling medium absorbs the heat generated by the motor rotor 20, improving the heat dissipation effect of the motor rotor. In particular, by setting the bearing chamber channel 31 in the bearing chamber 12, it is ensured that the coolant in the liquid lubrication cooling chamber 11 can enter the bearing chamber 12, thereby fully contacting the friction bearing 30 and realizing the heat dissipation effect generated by the friction bearing 30 during rotation, preventing the normal operation of the motor from being affected by excessive temperature.

[0032] The friction bearing 30 has an H-shaped cross-section along its axial direction. A buffer element 32 is provided between the outer wall of the friction bearing 30 and the inner wall of the bearing housing 12.

[0033] It also includes a water distribution plate 14, which extends radially outward along the motor shaft 21. The outer periphery of the water distribution plate 14 is fitted and snapped into the motor housing 10, and the water distribution plate 14 is provided with a water distribution plate channel 13.

[0034] It is understandable that the friction bearing 30 has an H-shaped cross-section along the axial direction, and the buffer 32 is set on the friction bearing 30. The radial dimension of the middle part of the friction bearing 30 is smaller than that of the two ends, making its cross-section along the axial direction H-shaped. This makes it difficult for the buffer 32 to detach from the friction bearing 30, thereby improving the stability of motor operation and reducing the failure rate.

[0035] Reference Figures 1 to 6 The buffer element 32 is annular and is fitted onto the friction bearing 30 at the position with the smallest radial dimension.

[0036] It is worth noting that in the embodiments of this utility model, the buffer 32 is an annular elastic member, and the inner diameter of the annular elastic buffer 32 is approximately equal to the outer diameter of the smallest cylindrical surface of the H-shaped friction bearing 30. The annular buffer 32 is sleeved on the smallest cylindrical surface of the T-shaped friction bearing 30.

[0037] It is worth noting that in the embodiments of this utility model, the friction bearing 30 is made of polytetrafluoroethylene or graphite.

[0038] Compared to the existing friction bearing 30 made of silicon carbide, friction bearings made of polytetrafluoroethylene or graphite have better self-lubricating effect, reduce bearing heat generation, and extend equipment life.

[0039] Reference Figures 3 to 5 The friction bearing 30 has several bearing chamber channels 31.

[0040] It is worth noting that in the embodiments of this utility model, the bearing chamber flow channel 31 is opened on the friction bearing 30, so that the cooling medium is closer to the motor shaft 21, thereby improving the cooling effect.

[0041] It is worth noting that in some embodiments of this utility model, there are several bearing chamber flow channels 31, and the several bearing chamber flow channels 31 are evenly distributed along the circumference of the friction bearing 30.

[0042] It is worth noting that in some embodiments of this utility model, there are two bearing chamber flow channels 31.

[0043] It should be noted that in some embodiments of this utility model, the bottom surface of the bearing chamber flow channel 31 is an arc surface. The arc surface of the bearing chamber flow channel 31 can reduce stress concentration, increase the maximum torque that the friction bearing 30 can withstand, and improve the service life of the equipment.

[0044] Reference Figure 1 An axial stop ring 33 is provided between the friction bearing 30 and the motor rotor 20, and the axial stop ring 33 is sleeved on the motor shaft 21.

[0045] Reference Figure 6 A water groove 331 is provided on the axial stop ring 33.

[0046] It is worth noting that when the water pump is running, water can easily enter between the axial retaining ring 33 and the friction bearing 30 through the water tank 331, forming a water film, reducing friction, which helps to extend the motor life and reduce noise.

[0047] It is worth noting that the washing pump of the second aspect of this utility model has all the beneficial effects brought about by the motor of the first aspect, and will not be repeated here.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An electric motor, characterized in that, include: The motor housing (10) has a liquid lubrication cooling chamber (11) and a bearing chamber (12) located at one end of the liquid lubrication cooling chamber (11). The motor housing (10) has a water distribution channel (13) that connects the liquid lubrication cooling chamber (11) and the outside. The motor rotor (20) is disposed in the liquid lubrication cooling chamber (11). The motor rotor (20) has a motor shaft (21) passing through it along its axial direction. One end of the motor shaft (21) extends into the bearing chamber (12), and the other end of the motor shaft (21) passes through the motor housing (10) and is rotatably connected to it and extends outward. Friction bearing (30), the friction bearing (30) is disposed in the bearing chamber (12) and sleeved on the motor shaft (21), and a bearing chamber flow channel (31) communicating with the liquid lubrication cooling chamber (11) is provided between the bearing chamber (12) and the friction bearing (30), and the bearing chamber flow channel (31) extends along the axial direction of the bearing chamber (12); The friction bearing (30) has an H-shaped cross section along the axial direction, and a buffer (32) is provided between the outer wall surface of the friction bearing (30) and the inner wall surface of the bearing chamber (12). It also includes a water distribution plate (14), which extends radially outward along the motor shaft (21), and the outer periphery of the water distribution plate (14) is adapted and snapped into the motor housing (10), and the water distribution plate (14) is provided with the water distribution plate flow channel (13).

2. The motor according to claim 1, characterized in that, The buffer (32) is annular and is fitted onto the friction bearing (30) at the position with the smallest radial dimension.

3. The motor according to claim 1, characterized in that, The friction bearing (30) is made of polytetrafluoroethylene or graphite.

4. The motor according to claim 1, characterized in that, The friction bearing (30) has a plurality of bearing chamber channels (31).

5. The motor according to claim 4, characterized in that, There are two flow channels (31) in the bearing chamber.

6. The motor according to claim 4, characterized in that, The bottom surface of the bearing chamber flow channel (31) is an arc surface.

7. The motor according to claim 1, characterized in that, An axial stop ring (33) is provided between the friction bearing (30) and the motor rotor (20), and the axial stop ring (33) is sleeved on the motor shaft (21).

8. The motor according to claim 7, characterized in that, A water groove (331) is provided on the axial stop ring (33).

9. A washing pump, characterized in that, An electric motor having any one of claims 1 to 8.

Images