Pump

Abstract

A pump comprises a shell assembly and a power assembly, the shell assembly comprises a water distribution disc, the water distribution disc comprises a bottom wall part, the power assembly comprises a first rod, the first rod comprises a supporting part, the supporting part is fixed to the bottom wall part, the power assembly comprises a rotor assembly, and the rotor assembly comprises a magnetic piece, a first friction piece, a second friction piece and an impeller. The magnetic part, the first friction part, the second friction part and the impeller are integrated, the rotor assembly comprises a supporting part, in the axial direction of the first rod, the first friction part is located at one end of the supporting part, the second friction part is located at the other end of the supporting part, and the magnetic part, the first friction part, the second friction part and the impeller are defined. The surface perpendicular to the axis of the first friction piece is a first surface, the inner ring of the projection of the first friction piece on the first surface is located in the inner ring of the projection of the supporting piece on the first surface, and the projection of the second friction piece on the first surface is located in the inner ring of the projection of the supporting piece on the first surface. The working efficiency of the pump is improved.

Description

[Technical field]

[0001] The invention relates to the field of fluid control, in particular to a pump. [Background technology]

[0002] A pump comprises a power assembly and a housing assembly, wherein a fixed portion of the housing assembly is sealed and fixed to a fixed portion of the power assembly, the power assembly comprises an impeller, a water separation plate, a rotor, a rotating shaft and a bearing bracket, the impeller is located at one end of the rotating shaft, the rotating shaft passes through a rotor and is fixed to the rotor, the rotor is located in an accommodating cavity of the water separation plate, the bearing bracket cover is arranged in the accommodating cavity and is fixed to the water separation plate, the power assembly further comprises two bearings sleeved on the rotating shaft, one of the bearings is located in the bearing bracket, and the other bearing is located in the water separation plate, so as to limit the synchronously running rotor and the rotating shaft, a rubber ring is sleeved on the outside of the bearing, the power assembly further comprises a magnetic ring and a rubber part, the rubber part is sleeved on the magnetic ring and then installed on one side of the rotor, the structure is relatively complicated, and the assembly is inconvenient.

[0003] refer to Figure 7 , for the convenience of assembly, the impeller 222', the bearing 4', the bearing 1114', and the rotor 221' are injection molded into an integral part, and the rotating shaft 21' and the water dividing plate 11' are injection molded and fixed. During assembly, it is only necessary to assemble the impeller 222', the bearing 4', the bearing 1114', and the rotor 221' which are injection molded into one piece to the rotating shaft 21'. The magnetic ring 23' is sleeved on the rotating shaft 21' and is located between the support part 31' and the bearing 4'. Since the integral part after injection molding needs to be sleeved on the rotating shaft 21', and due to the bearing 4' and the bearing 1114', in order to ensure demoulding, the inner diameter of the injection molded part 223' is the same as the inner diameter of the bearing 4' and the bearing 1114', otherwise it is difficult to demould. However, since the inner diameter of the injection molded part 223' is the same as the inner diameter of the bearing 4' and the bearing 1114', when the pump is working, friction is generated between the injection molded part 223' and the rotating shaft 21', thereby affecting the working efficiency of the pump. [Summary of the invention]

[0004] A pump is provided, comprising a housing assembly and a power assembly, wherein a fixed portion of the housing assembly is sealed and fixed to a fixed portion of the power assembly, the housing assembly comprises a water separation plate, the water separation plate comprises a bottom wall portion, the power assembly comprises a first rod, the first rod comprises a support portion, the support portion is fixed to the bottom wall portion, the power assembly comprises a rotor assembly 12, the rotor assembly comprises a magnetic member, a first friction member, a second friction member and an impeller, the magnetic member, the first friction member, the second friction member and the impeller are an integral part, the water separation plate has a rotor accommodating cavity, the magnetic member is at least partially located in the rotor accommodating cavity cavity, the rotor assembly includes a support member, in the axial direction of the first rod, the first friction member is located at one end of the support member, the second friction member is located at the other end of the support member, the first friction member is sleeved on the first rod, the second friction member is sleeved on the first rod, and the support member is sleeved on the first rod, and it is defined that the surface perpendicular to the axis of the first friction member is the first surface, the inner circle of the projection of the first friction member on the first surface is located within the inner circle of the projection of the support member on the first surface, and the projection of the second friction member on the first surface is located within the inner circle of the projection of the support member on the first surface.

[0005] In such a pump, the first friction member is located at one end of the support member, and the second friction member is located at the other end of the support member, the first friction member is sleeved on the first rod, the second friction member is sleeved on the first rod, and the support member is sleeved on the first rod. It is defined that the surface perpendicular to the axis of the first friction member is the first surface, the inner circle of the projection of the first friction member on the first surface is located within the inner circle of the projection of the support member on the first surface, and the projection of the second friction member on the first surface is located within the inner circle of the projection of the support member on the first surface. When the pump is working, the inner wall surface of the first friction member rubs against the first rod, and the inner wall surface of the second friction member rubs against the first rod, and the inner circle of the projection of the first friction member on the first surface is located within the inner circle of the projection of the support member on the first surface, and the projection of the second friction member on the first surface is located within the inner circle of the projection of the support member on the first surface, thereby reducing the friction between the rotor assembly and the first rod and improving the working efficiency of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a cross-sectional view of the pump of the present invention;

[0007] Figure 2 is a cross-sectional view of a rotor assembly in the present invention;

[0008] Figure 3 It is a structural schematic diagram of the support member in the present invention;

[0009] Figure 4 is a schematic structural diagram of the first friction member in the present invention;

[0010] Figure 5 is a schematic structural diagram of the second friction member in the present invention;

[0011] Figure 6 It is a schematic diagram of the structure of the magnetic member in the present invention;

[0012] Figure 7 It is a structural schematic diagram of a background technology pump.

[0013] Reference numerals:

[0014] Shell assembly 1, water distribution plate 11, bottom wall portion 111, rotor accommodating chamber 112, third convex portion 113, fourth convex portion 114, pump inlet pipe 12, pump outlet pipe 13,

[0015] The first rod 21, the supporting part 211, the rotor assembly 22, the magnetic part 221, the second main body part 2211, the second convex part 2212, the first friction part 222, the first groove 2221, the second friction part 223, the second groove 2231, the impeller 224, the supporting part 225, the first main body part 2251, the first convex part 2252, the first injection part 2261, the second injection part 2262, the third injection part 2263, the fourth injection part 2264, the fifth injection part 2265, the sixth injection part 2266, and the seventh injection part 2267. DETAILED DESCRIPTION

[0016] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0017] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

[0018] refer to Figure 1 , a pump that can be applied to household appliances such as dishwashers, but not limited thereto.

[0019] refer to Figure 1The pump includes a housing assembly 1 and a power assembly. The fixed portion of the housing assembly 1 is sealed and fixed to the fixed portion of the power assembly. The housing assembly 1 has a pump inlet pipe 12 and a pump outlet pipe 13. The housing assembly 1 includes a water separation plate 11. The water separation plate 11 includes a bottom wall portion 111. The power assembly includes a first rod 21. The first rod 21 includes a support portion 211. The support portion 211 is fixed to the bottom wall portion 111. The power assembly includes a rotor assembly 22. The rotor assembly 22 includes a magnetic member 221, a first friction member 222, a second friction member 223 and an impeller 224. The magnetic member 221, the first friction member 222, the second friction member 223 and the impeller 224 are an integrated member. The water separation plate 11 has a rotor accommodating cavity 112. The magnetic member 221, the first friction member 222, the second friction member 223 and the impeller 224 are integrated. The member 221 is at least partially located in the rotor accommodating cavity 112. The rotor assembly 22 includes a support member 225. In the axial direction of the first rod 21, the first friction member 222 is located at one end of the support member 225, and the second friction member 223 is located at the other end of the support member 225. The first friction member 222 is sleeved on the first rod 21, the second friction member 223 is sleeved on the first rod 21, and the support member 225 is sleeved on the first rod 21. It is defined that the surface perpendicular to the axis of the first friction member 222 is the first surface, the inner circle of the projection of the first friction member 222 on the first surface is located within the inner circle of the projection of the support member 225 on the first surface, and the projection of the second friction member 223 on the first surface is located within the inner circle of the projection of the support member 225 on the first surface.

[0020] In such a pump, the first friction member 222 is located at one end of the support member 225, the second friction member 223 is located at the other end of the support member 225, the first friction member 222 is sleeved on the first rod 21, the second friction member 223 is sleeved on the first rod 21, and the support member 225 is sleeved on the first rod 21. It is defined that the surface perpendicular to the axis of the first friction member 222 is the first surface, the inner circle of the projection of the first friction member 222 on the first surface is located within the inner circle of the projection of the support member 225 on the first surface, and the second friction member 223 is located within the inner circle of the projection of the support member 225 on the first surface. The projection of the first friction member 222 on the first surface is located within the inner circle of the projection of the support member 225 on the first surface. When the pump is working, the inner wall surface of the first friction member 222 rubs against the first rod 21, and the inner wall surface of the second friction member 223 rubs against the first rod 21. The inner circle of the projection of the first friction member 222 on the first surface is located within the inner circle of the projection of the support member 225 on the first surface, and the projection of the second friction member 223 on the first surface is located within the inner circle of the projection of the support member 225 on the first surface, thereby reducing the friction between the rotor assembly 22 and the first rod 21 and improving the working efficiency of the pump.

[0021] The material of the first friction member 222 and the second friction member 223 can be wear-resistant materials such as graphite or ceramics. Of course, the material of the first friction member 222 and the second friction member 223 can be a combination of multiple materials. The material of the first friction member 222 and the second friction member 223 can be the same or different, which will not be elaborated here.

[0022] refer to Figure 1 The inner diameter of the support member 225 is greater than the inner diameter of the first friction member 222 , and the inner diameter of the support member 225 is greater than the inner diameter of the second friction member 223 , that is, the inner wall surface of the support member 225 is cylindrical.

[0023] Of course, the inner wall surface of the support member 225 may also be in other shapes, such as a rectangular parallelepiped, etc., which will not be described in detail here.

[0024] refer to Figure 2 The support member 225 includes a first main body portion 2251, and the first main body portion 2251 is in a hollow cylindrical shape. Of course, the first main body portion 2251 can also be in other shapes, such as a hollow rectangular parallelepiped, which will not be described here.

[0025] In the axial direction of the first rod 21, the first friction member 222 is located at one end of the first main body 2251, and the second friction member 223 is located at the other end of the first main body 2251. The first friction member 222 is sleeved on the first rod 21, the second friction member 223 is sleeved on the first rod 21, and the first main body 2251 is sleeved on the first rod 21. The inner diameter of the first main body 2251 is greater than the diameter of the first rod 21. A portion of the first main body 2251 is located between the first rod 21 and the magnetic member 221. The rotor assembly 22 includes a first injection molding part 2261, and the first injection molding part 2261 is located between the first main body 2251 and the magnetic member 221.

[0026] The axis of the first main body 2251 coincides with the axis of the first friction member 222 and the axis of the second friction member 223 .

[0027] refer to Figure 2 and Figure 3 The support member 225 includes a first protrusion 2252, which protrudes from the first main body portion 2251. The number of the first protrusions 2252 is multiple, and the multiple first protrusions 2252 are arranged at intervals in the circumference of the first main body portion 2251. The end of the first protrusion 2252 away from the first main body portion 2251 abuts against the magnetic member 221.

[0028] For example, the number of the first protrusions 2252 is four, and the four first protrusions 2252 are equidistantly arranged axially on the first main body 2251. The end of the first protrusion 2252 away from the first main body 2251 abuts against the magnetic member 221, so that the magnetic member 221 and the support member 225 are positioned, thereby reducing the offset of the magnetic member 221 and the support member 225.

[0029] Of course, the first protrusions 2252 may also have a certain distance in the axial direction of the first main body 2251, that is, they are staggered in the axial direction of the first main body 2251, which will not be elaborated here.

[0030] refer to Figure 2 and Figure 4 The first friction member 222 has a first groove 2221, which is recessed in the outer wall of the first friction member 222. The rotor assembly 22 includes a second injection molded portion 2262, which is wrapped around the first friction member 222. A portion of the second injection molded portion 2262 is located in the first groove 2221, thereby improving the strength of the connection between the first friction member 222 and the second injection molded portion 2262.

[0031] In the axial direction of the first rod 21 , the end of the second injection portion 2262 away from the first body portion 2251 is located between the first body portion 2251 and the end of the first friction member 222 away from the first body portion 2251 .

[0032] refer to Figure 2 The rotor assembly 22 includes a third injection molded portion 2263 , the second injection molded portion 2262 is located at an end of the third injection molded portion 2263 away from the magnetic member 221 , and the third injection molded portion 2263 is covered on the first main body portion 2251 .

[0033] refer to Figure 2 and Figure 6 The magnetic member 221 includes a second main body portion 2211 and a second protrusion 2212. The second main body portion 2211 is annular. The second protrusion 2212 protrudes from one end of the second main body portion 2211. There are multiple second protrusions 2212, and the multiple second protrusions 2212 are arranged at intervals along the circumference of the second main body portion 2211. The rotor assembly 22 includes a fourth injection molded part 2264. The fourth injection molded part 2264 protrudes from the end of the third injection molded part 2263 away from the second injection molded part 2262. The fourth injection molded part 2264 is located at one end of the second main body portion 2211. A portion of the fourth injection molded part 2264 is located between one of the second protrusions 2212 and another of the second protrusions 2212, thereby improving the fixing strength of the fourth injection molded part 2264 and the magnetic member 221.

[0034] refer to Figure 2 and Figure 5 The second friction member 223 has a second groove 2231, which is recessed in the outer wall of the second friction member 223. The rotor assembly 22 includes a fifth injection-molded part 2265, which is covered on the second friction member 223. Part of the fifth injection-molded part 2265 is located in the second groove 2231. The fifth injection-molded part 2265 is located on the side of the first injection-molded part 2261 away from the fourth injection-molded part 2264. In the axial direction of the first rod 21, the end of the fifth injection-molded part 2265 away from the first main body 2251 is located between the first main body 2251 and the end of the second friction member 223 away from the first main body 2251.

[0035] refer to Figure 2The magnetic member 221 includes a third protrusion 113, which protrudes from the other end of the second main body 2211. The number of the third protrusions 113 is multiple, and the multiple third protrusions 113 are arranged at intervals along the circumference of the second main body 2211. The rotor assembly 22 includes a sixth injection molded part 2266 and a seventh injection molded part 2267. The sixth injection molded part 2266 is located on the side of the fifth injection molded part 2265 away from the first injection molded part 2261, and the seventh injection molded part 2267 protrudes from the sixth injection molded part 2266. The seventh injection molded part 2267 is located at the other end of the second main body 2211, and a portion of the seventh injection molded part 2267 is located between one of the third protrusions 113 and another of the third protrusions 113.

[0036] refer to Figure 1 The water diversion plate 11 includes a third protrusion 113 and a fourth protrusion 114. The third protrusion 113 protrudes from the inner side of the bottom wall 111, and the fourth protrusion 114 protrudes from the outer side of the bottom wall 111. The first rod 21 passes through the third protrusion 113, and the fourth protrusion 114 has an accommodating cavity. The end of the first rod 21 is located in the accommodating cavity, thereby improving the connection strength between the first rod 21 and the water diversion plate 11.

[0037] Of course, the portion of the first rod 21 that passes through the third protrusion 113 and / or the portion located in the accommodating cavity is provided with knurling to prevent the first rod 21 from rotating relative to the water diversion plate 11 or detaching from the water diversion plate 11, which will not be elaborated here.

[0038] When forming the rotor assembly 22, the first friction member 222 is placed at one end of the support member 225, the second friction member 223 is placed at the other end of the support member 225, the magnetic member 221 is sleeved on the support member 225, and after the inner wall abuts against the first protrusion 2252, injection molding is started to form an integral part, and the impeller 224 is injection molded.

[0039] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pump, comprising a housing assembly (1) and a power assembly, wherein a fixed portion of the housing assembly (1) is sealed and fixed to a fixed portion of the power assembly, characterized in that: The housing assembly (1) comprises a water separation plate (11), the water separation plate (11) comprises a bottom wall portion (111), the power assembly comprises a first rod (21), the first rod (21) comprises a support portion (211), the support portion (211) is fixed to the bottom wall portion (111), the power assembly comprises a rotor assembly (22), the rotor assembly (22) comprises a magnetic member (221), a first friction member (222), a second friction member (223) and an impeller (224), the magnetic member (221), the first friction member (222), the second friction member (223) and the impeller (224) are an integral part, the water separation plate (11) comprises a rotor accommodating cavity (112), the magnetic member (221) is at least partially located in the rotor accommodating cavity (112), the rotor assembly (22) comprises a rotor accommodating cavity (112), and the rotor assembly (22) comprises a rotor accommodating cavity (112). A support member (225) is provided. In the axial direction of the first rod (21), the first friction member (222) is located at one end of the support member (225), and the second friction member (223) is located at the other end of the support member (225). The first friction member (222) is sleeved on the first rod (21), the second friction member (223) is sleeved on the first rod (21), and the support member (225) is sleeved on the first rod (21). It is defined that a surface perpendicular to the axis of the first friction member (222) is a first surface, an inner circle of a projection of the first friction member (222) on the first surface is located within an inner circle of a projection of the support member (225) on the first surface, and a projection of the second friction member (223) on the first surface is located within an inner circle of a projection of the support member (225) on the first surface.

2. The pump according to claim 1, characterized in that The inner diameter of the support member (225) is greater than the inner diameter of the first friction member (222), and the inner diameter of the support member (225) is greater than the inner diameter of the second friction member (223).

3. The pump according to claim 2, characterized in that The support member (225) comprises a first main body (2251); in the axial direction of the first rod (21), the first friction member (222) is located at one end of the first main body (2251); the second friction member (223) is located at the other end of the first main body (2251); the first friction member (222) is sleeved on the first rod (21); the second friction member (223) is sleeved on the first rod (21); the first main body (2251) is sleeved on the first rod (21); the inner diameter of the first main body (2251) is greater than the diameter of the first rod (21); a portion of the first main body (2251) is located between the first rod (21) and the magnetic member (221); and the rotor assembly (22) comprises a first injection molding portion (2261); the first injection molding portion (2261) is located between the first main body (2251) and the magnetic member (221).

4. The pump according to claim 3, characterized in that The support member (225) includes a first protrusion (2252), which protrudes from the first main body (2251). The number of the first protrusions (2252) is multiple, and the multiple first protrusions (2252) are arranged at intervals in the circumference of the first main body (2251). The end of the first protrusion (2252) away from the first main body (2251) abuts against the magnetic member (221).

5. The pump according to claim 4, characterized in that The first friction member (222) has a first groove (2221), and the first groove (2221) is recessed in the outer wall of the first friction member (222). The rotor assembly (22) includes a second injection molded portion (2262), and the second injection molded portion (2262) is coated on the first friction member (222). A portion of the second injection molded portion (2262) is located in the first groove (2221). In the axial direction of the first rod (21), an end of the second injection molded portion (2262) away from the first main body (2251) is located between the first main body (2251) and an end of the first friction member (222) away from the first main body (2251).

6. The pump according to claim 5, characterized in that The rotor assembly (22) comprises a third injection molded part (2263), the second injection molded part (2262) is located at an end of the third injection molded part (2263) away from the magnetic part (221), and the third injection molded part (2263) is covered on the first main body (2251).

7. The pump according to claim 6, characterized in that The magnetic member (221) comprises a second main body (2211) and a second convex portion (2212); the second main body (2211) is annular; the second convex portion (2212) protrudes from one end of the second main body (2211); there are a plurality of second convex portions (2212), and the plurality of second convex portions (2212) are arranged at intervals along the circumference of the second main body (2211); the rotor assembly (22) comprises a fourth injection molded portion (2264); the fourth injection molded portion (2264) protrudes from an end of the third injection molded portion (2263) away from the second injection molded portion (2262); the fourth injection molded portion (2264) is located at one end of the second main body (2211); and a portion of the fourth injection molded portion (2264) is located between one of the second convex portions (2212) and another of the second convex portions (2212).

8. The pump according to claim 7, characterized in that The second friction member (223) has a second groove (2231), and the second groove (2231) is recessed in the outer wall of the second friction member (223). The rotor assembly (22) includes a fifth injection molded part (2265), and the fifth injection molded part (2265) is covered on the second friction member (223). Part of the fifth injection molded part (2265) is located in the second groove (2231). The fifth injection molded part (2265) is located on the side of the first injection molded part (2261) away from the fourth injection molded part (2264). In the axial direction of the first rod (21), the end of the fifth injection molded part (2265) away from the first main body (2251) is located between the first main body (2251) and the end of the second friction member (223) away from the first main body (2251).

9. The pump according to claim 8, characterized in that The magnetic member (221) comprises a third protrusion (113), wherein the third protrusion (113) protrudes from the other end of the second main body (2211), and the number of the third protrusions (113) is multiple, and the multiple third protrusions (113) are arranged at intervals along the circumference of the second main body (2211). The rotor assembly (22) comprises a sixth injection molded part (2266) and a seventh injection molded part (2267), wherein the sixth injection molded part (2266) is located on a side of the fifth injection molded part (2265) away from the first injection molded part (2261), and the seventh injection molded part (2267) protrudes from the sixth injection molded part (2266), and the seventh injection molded part (2267) is located at the other end of the second main body (2211), and a portion of the seventh injection molded part (2267) is located between one of the third protrusions (113) and another of the third protrusions (113).

10. The pump according to any one of claims 1 to 9, characterized in that The water diversion plate (11) comprises a third convex portion (113) and a fourth convex portion (114); the third convex portion (113) protrudes from the inner side of the bottom wall portion (111); the fourth convex portion (114) protrudes from the outer side of the bottom wall portion (111); the first rod (21) passes through the third convex portion (113); the fourth convex portion (114) has a receiving cavity; an end portion of the first rod (21) is located in the receiving cavity.

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