CN219299595U - Water pump sealing assembly, water pump and household appliance - Google Patents

Abstract

The utility model provides a water pump sealing assembly, a water pump and a household appliance. The water pump sealing assembly comprises a shell, a cover body, a sealing ring and a threaded connecting piece, wherein the cover body comprises a top wall and a peripheral wall, the shell and the top wall are sequentially arranged along the axial direction of the shell, and the sealing ring and the threaded connecting piece are connected between the shell and the cover body; the outer peripheral wall is sleeved on the outer periphery of the shell, the sealing ring is sleeved on the outer periphery of the shell, and the sealing ring is abutted between the outer peripheral wall and the shell along the radial direction of the shell; the threaded connecting piece is connected between the peripheral wall and the shell; the peripheral wall and the shell are also buckled through a turnbuckle structure. The water pump comprises the water pump sealing assembly. The household appliance comprises the water pump. According to the utility model, the cover body is rotationally buckled to the shell to complete radial sealing fit, the threaded connecting piece is used for reinforcing and locking, complicated bolting operation is not needed, the operation is simple, and the cover body and the shell are not needed to bear larger locking force of bolts, so that the rigidity requirement is reduced.

Description

Water pump sealing assembly, water pump and household appliance

Technical Field

The utility model relates to the technical field of water pumps, in particular to a water pump sealing assembly, a water pump and a household appliance.

Background

Domestic appliances such as washing machines, water heaters and some air conditioners require water pumps. The existing water pump comprises a shell, a cover body, a sealing ring, a bolt and a nut, wherein an annular groove is formed in the shell around the axial end face of an inner cavity opening of the shell, the sealing ring is arranged in the annular groove, an overhanging flange is arranged at the axial end part of the shell, after the cover body is axially covered on the axial end part, the bolt penetrates through the cover body and the flange and is locked with the nut, so that the cover body, the sealing ring and the shell are axially extruded to be in sealing fit.

The existing water pump sealing assembly has the problem that manual installation is inconvenient, and the requirement on the rigidity of the cover body and the shell is high. In order to effectively compress the sealing gasket by the cover body and the shell to achieve a sealing effect, bolts are required to be screwed by means of tools during installation, the torque requirement is high, the number of the bolts is large, the bolts are required to be crossed, symmetrically and gradually screwed, the consumption time is long, and the installation is inconvenient; in addition, the cover body and the shell are stressed greatly in a mode of axially locking the bolts and the nuts, and the rigidity requirements of the cover body and the shell are high.

Disclosure of Invention

A first object of the present utility model is to provide a water pump seal assembly that is easy to assemble and disassemble and reduces material stiffness requirements.

The second object of the utility model is to provide a water pump which is convenient to assemble and disassemble and reduces the requirement of material rigidity.

The third object of the utility model is to provide a household appliance with a water pump which is convenient to assemble and disassemble and reduces the requirement of material rigidity.

The water pump sealing assembly comprises a shell, a cover body, a sealing ring and a threaded connecting piece, wherein the cover body comprises a top wall, the shell and the top wall are sequentially arranged along the axial direction of the shell, and the sealing ring and the threaded connecting piece are connected between the shell and the cover body; the cover body also comprises a peripheral wall which is connected with the peripheral edge of the top wall and extends along the axial direction; the outer peripheral wall is sleeved on the outer periphery of the shell, the sealing ring is sleeved on the outer periphery of the shell, and the sealing ring is abutted between the outer peripheral wall and the shell along the radial direction of the shell; the threaded connecting piece is connected between the peripheral wall and the shell; the peripheral wall and the shell are also buckled through a turnbuckle structure.

According to the scheme, under the arrangement, the outer peripheral wall of the cover body, the sealing ring and the shell are in radial sealing fit, the cover body is only required to be rotationally buckled to be installed at one end of the shell during installation, the outer peripheral wall of the outer periphery and the shell at the inner periphery form a matching relationship to squeeze the sealing ring to generate a sealing effect, and then the sealing ring is locked through a threaded connecting piece such as a screw. Therefore, the extrusion force of the lower sealing ring is not determined by the locking degree of the threaded connecting piece, the sealing fit among the peripheral wall, the sealing ring and the shell is realized after the rotary buckling of the cover body is completed, the complex bolting operation is not needed, and the screw bolt fixing device has the characteristics of simplicity in operation and simplicity in installation; and the cover body and the shell do not need to bear larger locking force of the bolts, so that the rigidity requirement is reduced.

The further proposal is that the turnbuckle structure comprises a buckling protrusion and a buckling concave position; the buckling protrusion is arranged on the outer periphery of the shell, the buckling concave position is arranged on the inner periphery of the outer peripheral wall and comprises a first channel part extending along the axial direction and a second channel part extending along the circumferential direction of the outer peripheral wall, an inlet of the first channel part is positioned on the axial end face of the outer peripheral wall, the second channel part is communicated with the extending tail end of the first channel part, the buckling protrusion is positioned in the second channel part, and the buckling protrusion is in limiting fit with the outer peripheral wall in the axial direction; or the buckling bulge is arranged on the inner periphery of the outer peripheral wall, the buckling concave position is arranged on the outer periphery of the shell, the buckling concave position comprises a first channel part extending along the axial direction and a second channel part extending along the circumferential direction of the shell, an inlet of the first channel part is positioned on the axial end face of the shell, and the second channel part is communicated with the extending tail end of the first channel part; the buckling bulge is positioned in the second channel part and is in limit fit with the shell in the axial direction; after the cover body rotates relative to the shell, the buckling protrusion can withdraw from the buckling concave position through the first channel part.

From the above, under the setting of the turnbuckle structure, only need along axial butt joint when installing the lid on the casing make the lock protruding get into first passageway portion, the rotatory lid makes the lock protruding get into second passageway portion can, the operation degree of difficulty is lower and the locking effect is better.

The second channel part is internally provided with a first limit structure, the buckling protrusion is provided with a second limit structure, one of the first limit structure and the second limit structure is a limit protrusion, and the other of the first limit structure and the second limit structure is a limit recess; the first limiting structure and the second limiting structure are in circumferential limiting fit to prevent the buckling protrusion from exiting the second channel portion.

From the above, the cooperation of first limit structure and second limit structure can prevent that second passageway portion from returning first passageway portion, prevents lid and casing relative rotation to guarantee the axial locking between lid and the casing.

The further scheme is that the limiting protrusion is provided with an arc outer surface, and/or the limiting concave position is provided with an arc inner surface; the peripheral wall and/or the housing has an elastic deformability.

From the above, when the cover body rotates in place, the limit protrusion is just matched to the limit concave position, so as to play a role in rotation stopping and looseness prevention. Meanwhile, the design also plays a role in reminding in place, when the cover body is not rotated in place, the limiting protrusion blocks the cover body, the resistance is obviously perceived to be larger during rotation, and when the limiting protrusion is matched with the limiting concave position, the resistance is obviously perceived to be suddenly reduced and slightly sounded, so that the cover body can be informed of the fact that the cover body is rotated in place.

The second channel part is internally provided with a first guiding inclined plane, the first guiding inclined plane is arranged towards the buckling protrusion, the first guiding inclined plane comprises a first guiding initial end and a first guiding tail end, the first guiding tail end is far away from the first channel part than the first guiding initial end in the circumferential direction, and the first guiding tail end is far away from the inlet than the first guiding initial end in the axial direction; and/or, the buckling bulge is provided with a second guiding inclined plane, the second guiding inclined plane is arranged towards the inner wall surface of the buckling concave position, the second guiding inclined plane comprises a second guiding initial end and a second guiding tail end, the second guiding tail end is far away from the first channel part than the second guiding initial end in the circumferential direction, and the second guiding tail end is far away from the inlet than the second guiding initial end in the axial direction.

From the above, when the cover body and the shell are axially abutted and the cover body starts to rotate, the inclined first guide inclined surface and/or the inclined second guide inclined surface can guide the buckling protrusion to an accurate assembling position, and the cover body can be guaranteed to be installed in place.

The outer periphery of the shell is provided with a lightening hole, the shell comprises an axial blocking wall and a circumferential blocking wall, the axial blocking wall is arranged adjacent to the lightening hole in the axial direction, and the circumferential blocking wall is arranged adjacent to the lightening hole in the circumferential direction; the radial protrusion of the buckling edge body comprises a first part and a second part, the first part protrudes from the axial blocking wall, and the second part protrudes from the circumferential blocking wall along the radial direction of the shell.

In still a further aspect, the first portion and the second portion are arranged in a stepped shape on a projection of the snap projection in a projection direction. The inner contour of the second channel part is in a step shape.

From the above, because the axial retaining wall has smaller thickness and a certain draft taper, the buckling bulge protruding from the axial retaining wall has smaller size and is relatively weak, and therefore, the clamping block is designed into a step shape, and the extension amplitude and the size are increased, so that the clamping block meets the rigidity requirement.

Further, the shell and/or the cover body are/is molded by plastic.

From the above, the cover and the housing do not need to bear a large locking force of the bolt, so that the rigidity requirement is reduced, and therefore, plastic molding is selected to reduce the cost and the weight.

The further proposal is that the screw connecting piece is a screw, the peripheral wall is provided with a through hole, and the shell is provided with a connecting hole; the screw passes through the through hole and is matched with the connecting hole.

As can be seen from the above, the threaded connection is provided primarily for preventing the cover from loosening and maintaining a sealing engagement between the peripheral wall, the seal ring and the housing. Because the locking device does not have the requirement of strong locking force, compared with the matching of a bolt and a nut, the screw is adopted to reduce the operation difficulty.

Still further, the number of through holes and connecting holes is greater than the number of screws.

From the above, when the casing selects the injection molding, the injection molding is beaten the screw and dismantles once after, and the connecting hole performance that this screw cooperation had been reduced, in order to guarantee its detachability, design more through-holes and connecting hole on the casing, can select the connecting hole that has not been used to cooperate after dismantling and reinstalling the lid, guarantee anticreep effect and sealed effect.

The second object of the present utility model provides a water pump comprising the water pump seal assembly described above.

The third object of the present utility model provides a household appliance comprising the water pump as described above.

Drawings

Fig. 1 is a cross-sectional view of an embodiment of the water pump of the present utility model.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a structural view of a housing in an embodiment of the water pump of the present utility model.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is a view of a structure of a water pump according to an embodiment of the present utility model under a first view angle of a cover.

Fig. 6 is a view of a structure of a cover body at a second view angle in an embodiment of the water pump according to the present utility model.

Fig. 7 is an enlarged view at C in fig. 6.

Fig. 8 is a schematic diagram of the operation of the screw structure in the water pump according to the embodiment of the present utility model.

Detailed Description

Referring to fig. 1 and 2, the water pump of the present utility model includes a water pump sealing assembly including a housing 1, a cover 2, a seal ring 3, and screws (not shown in the drawings), the housing 1 being a stator housing, and the cover 2 being an end cover. The x-axis direction in fig. 1 indicates the axial direction of the housing 1, the housing 1 and the cover 2 are disposed in this order in the axial direction of the housing 1, and the outer peripheral wall 22 of the cover 2, the seal ring 3, and the housing 1 are pressed in the radial direction of the housing 1 to form a sealing engagement.

In this embodiment, the housing 1 and the cover 2 are both molded from plastic. Referring to fig. 3 to 5, at the outer periphery of the housing 1, a plurality of first engaging projections 13 and two second engaging projections 14 are provided at positions near the axial end 109 of the housing 1, the plurality of first engaging projections 13 and the two second engaging projections 14 each projecting from the outer periphery of the housing 1 in the radial direction of the housing 1 and in a direction away from the axial center of the housing 1. The plurality of first buckling protrusions 13 and the two second buckling protrusions 14 are arranged at intervals along the circumferential direction of the shell 1.

Further, as shown in fig. 3 and 4, the outer periphery of the housing 1 is provided with a plurality of lightening holes 160 arranged in an array, and the plurality of lightening holes 160 are spaced by a reinforcing rib network, wherein the reinforcing rib network comprises a circumferential blocking wall 161, the circumferential blocking wall 161 protrudes in the radial direction of the housing 1 and in a direction away from the axis of the housing 1, and the circumferential blocking wall 161 extends in the axial direction of the housing 1, and the lightening holes 160 are arranged adjacent to the circumferential blocking wall 161 in the circumferential direction of the housing 1. In addition, since the weight reducing hole 160 is recessed, at the outer periphery of the housing 1, an axial blocking wall 162 is also formed at a position near the axial end of the housing 1, the axial blocking wall 162 protrudes toward the outer periphery of the housing 1 in a direction away from the axial center of the housing 1, and the axial blocking wall 162 extends and surrounds in the circumferential direction of the housing 1, in the axial direction of the housing 1, the axial blocking wall 162 is disposed adjacent to the weight reducing hole 160, and the extending ends of the plurality of circumferential blocking walls 161 are all connected to the axial blocking wall 162. And the first buckling protrusions 13 and the second buckling protrusions 14 are both protruded from the axial blocking wall 162. Further, the plurality of first engaging projections 13 and the two second engaging projections 14 are each provided at a position facing the circumferential blocking wall 161. The first buckling protrusion 13 and the second buckling protrusion 14 are both buckling protrusions of the present utility model.

In this embodiment, the first fastening protrusion 13 includes, in addition to the first portion 131 protruding from the axial blocking wall 162, a second portion 132 protruding from the circumferential blocking wall 161, and in projection of the first fastening protrusion 13 in the protruding direction shown in fig. 4, a step is formed between the first portion 131 and the second portion 132, because the axial blocking wall 162 has a smaller axial dimension and a certain draft taper, and this arrangement makes the thickness of the first fastening protrusion 13 smaller, so as to enhance the rigidity of the first fastening protrusion 13.

Referring to fig. 5, the second engaging protrusion 14 mainly plays a role of locking against rotation, and has a lower rigidity requirement than the first engaging protrusion 13, so that the second engaging protrusion 14 does not extend to the circumferential blocking wall 161. The convex end surface of the second buckling protrusion 14 is provided with a limiting concave position 143, and the inner surface of the limiting concave position 143 is an arc surface. In addition, the outer periphery of the housing 1 is provided with 12 connection holes 15 uniformly arranged in the circumferential direction thereof, and the connection holes 15 are provided on the surface of the circumferential blocking wall 161 and are close to the axial blocking wall 162 in the axial direction of the housing 1. When the screw is a self-tapping screw, tapping is not required in the connecting hole 15.

In addition, referring to fig. 1 and 2, the housing 1 has an axial end 109, and the seal ring 3 is fitted over the axial end 109 and is located between the axial end 109 and the axial blocking wall 162.

Referring to fig. 1 and 2, the cover 2 includes a top wall 21 and a peripheral wall 22, the peripheral wall 22 is connected to the peripheral edge of the top wall 21 and extends in the axial direction, as shown in fig. 1, the top wall 21 is axially matched with the axial end 109 of the housing 1, and the peripheral wall 22 is sleeved on the outer peripheries of the axial end 109, the axial blocking wall 162 and the sealing ring 3.

Referring to fig. 6 and 7, 12 through holes 25 are provided in the outer peripheral wall 22, the through holes 25 being uniformly arranged in the circumferential direction of the lid body 2, the through holes 25 penetrating in the radial direction of the lid body 2; the inner periphery of the outer peripheral wall 22 is provided with a plurality of first buckling concave positions 23 and two second buckling concave positions 24, and the first buckling concave positions 23 and the two second buckling concave positions 24 are buckling concave positions of the utility model. The first engaging recess 23 includes a first channel portion 231 extending in the axial direction of the cover 2 and a second channel portion 232 extending in the circumferential direction of the outer peripheral wall 22, an inlet 230 of the first channel portion 231 is located at an axial end surface of the outer peripheral wall 22, and the second channel portion 232 communicates with an extending end of the first channel portion 231. Referring to fig. 8 again, since the second channel portion 232 is configured to cooperate with the first engaging protrusion 13, the inner contour of the second channel portion 232 is stepped on the projection of the first engaging protrusion 13 in the protruding direction.

Referring to fig. 7, the second fastening socket 24 also includes a first channel portion extending in the axial direction and a second channel portion extending in the axial direction of the peripheral wall 22, unlike the first fastening socket 23, since the second fastening socket 24 is configured to cooperate with the second fastening protrusion 14, corresponding to the limit socket 143 on the second fastening protrusion 14, the limit protrusion 243 is disposed in the second channel portion of the second fastening socket 24, and the limit protrusion 243 has an arcuate outer surface. In addition, the cover 2 is integrally molded of plastic so that the outer peripheral wall 22 has a slight elastic deformability.

In this embodiment, the first fastening protrusion 13 and the first fastening recess 23 form a set of the fastening structure of the present utility model, and the second fastening protrusion 14 and the second fastening recess 24 form another set of the fastening structure of the present utility model. Referring to fig. 8 again, when the cover 2 is mounted on the housing 1 by the arrangement of the turnbuckle structure, during the process of covering the cover 2 onto the housing 1 in the axial direction, the outer peripheral wall 22 is sleeved on the outer periphery of the axial end 109, the axial blocking wall 162 and the sealing ring 3, and the first buckling protrusion 13 enters the first channel 231 from the inlet 230 of the first channel 231 until the first buckling protrusion 13 reaches the extending end of the first channel 231, and then the outer peripheral wall 22, the sealing ring 3 and the axial end 109 of the housing 1 are mutually pressed in the radial direction to be in sealing fit.

Then, the cover body 2 is rotated, the first buckling protrusion 13 can enter the second channel portion 232 until the first buckling protrusion 13 reaches the extending end of the second channel portion 232, and the cover body 2 cannot continue to rotate, so that the first buckling protrusion 13 and the peripheral wall 22 are in limit fit with each other along the axial direction. In addition, in the process that the second fastening protrusion 23 enters the second channel part of the second fastening concave position 24, the limiting protrusion 243 is abutted against the second fastening protrusion 23, so that a large blocking force is generated, and the peripheral wall 22 is slightly deformed by outward expansion; until the limit protrusion 243 enters the limit concave position 143, the deformation of the peripheral wall 22 is recovered, and the limit protrusion 243 and the limit concave position 143 form limit fit in the circumferential direction, so that the cover body 2 can be prevented from reversing under the condition that the cover body 2 is not subjected to larger reversing driving force, and a certain anti-loosening effect is achieved. In contrast, a sufficiently large driving force is applied to reverse the cover 2, and then the first snap projections 13 can be withdrawn from the first snap recesses 23 through the inlets 230 of the first passage portions 231, thereby completing the removal of the cover 2.

Therefore, the utility model only needs to rotationally lock the cover body 2 to be installed on the shell 1, the peripheral wall 22 at the periphery and the shell 1 at the inner periphery form a matching relationship to generate a sealing effect by radially extruding the sealing ring 3, and then the sealing ring is locked by a threaded connecting piece such as a screw, the extrusion force of the lower sealing ring 3 is not determined by the locking degree of the threaded connecting piece, the screwing operation difficulty is reduced, the installation is simpler, the cover body 2 and the shell 1 do not need to bear larger locking force of a bolt, the rigidity requirement is reduced, and the cost and the weight are reduced by adopting plastic molding.

Referring to fig. 8, further, a first guiding inclined surface 233 is provided in the second passage portion 232, the first guiding inclined surface 233 is provided toward the engaging protrusion 13, the first guiding inclined surface 233 includes a first guiding start end 2331 and a first guiding end 2332 at both extending ends thereof, the first guiding end 2332 is farther from the first passage portion 231 than the first guiding start end 2331 in the circumferential direction, and the first guiding end 2332 is farther from the inlet 230 than the first guiding start end 2331 in the axial direction; the engaging protrusion 13 is provided with a second guide slope 133, the second guide slope 133 is provided toward an inner wall surface of the engaging recess 23, the second guide slope 133 includes a second guide start end 1331 and a second guide end 1332 at both extending ends thereof, the second guide end 1332 is spaced apart from the first passage portion 231 than the second guide start end 1331 in a circumferential direction, and the second guide end 1332 is spaced apart from the inlet 230 than the second guide start end 1331 in an axial direction. When the cap 2 and the housing 1 are axially abutted and the cap 2 starts to rotate, the inclined first guide inclined surfaces 233 and the second guide inclined surfaces 133 guide the snap projections 13 to the accurate assembly positions, and the cap 2 can be secured in place.

In addition, the housing 1 and the cover 2 are actually locked by only 3 to 4 screws. And because casing 1 adopts plastic molding, after the injection molding is beaten the screw and is dismantled once, the connecting hole 15 performance that this screw cooperation was passed can reduce, in order to guarantee its detachability, set up 12 through-holes 25 and 12 connecting hole 15 on casing 1, guarantee that lid 2 still can select to use through-hole 25 and connecting hole 15 that have not been used to cooperate after being dismantled 3 to 4 times, guarantee anticreep effect and sealed effect.

In other embodiments, the fastening protrusion of the turnbuckle structure is disposed on the inner periphery of the outer peripheral wall, and the fastening recess is disposed on the outer periphery of the housing.

In other embodiments, the connection hole is a threaded hole.

The utility model also claims a household appliance comprising the water pump of the utility model.

Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the utility model, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the utility model, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the utility model.

Claims (12)

1. The water pump sealing assembly comprises a shell, a cover body, a sealing ring and a threaded connecting piece, wherein the cover body comprises a top wall, the shell and the top wall are sequentially arranged along the axial direction of the shell, and the sealing ring and the threaded connecting piece are connected between the shell and the cover body;

the method is characterized in that:

the cover body further comprises a peripheral wall which is connected to the peripheral edge of the top wall and extends along the axial direction;

the outer peripheral wall is sleeved on the outer periphery of the shell, the sealing ring is sleeved on the outer periphery of the shell, and the sealing ring is abutted between the outer peripheral wall and the shell along the radial direction of the shell;

the threaded connection is connected between the peripheral wall and the housing;

the outer peripheral wall is buckled with the shell through a turnbuckle structure.

2. The water pump seal assembly of claim 1, wherein:

the turnbuckle structure comprises a buckling protrusion and a buckling concave position;

the buckling protrusion is arranged on the outer periphery of the shell, the buckling concave position is arranged on the inner periphery of the outer peripheral wall, the buckling concave position comprises a first channel part extending along the axial direction and a second channel part extending along the circumferential direction of the outer peripheral wall, an inlet of the first channel part is positioned on the axial end face of the outer peripheral wall, the second channel part is communicated with the extending tail end of the first channel part, the buckling protrusion is positioned in the second channel part, and the buckling protrusion is in limit fit with the outer peripheral wall in the axial direction;

or, the buckling protrusion is arranged on the inner periphery of the outer peripheral wall, the buckling concave position is arranged on the outer periphery of the shell, the buckling concave position comprises a first channel part extending along the axial direction and a second channel part extending along the circumferential direction of the shell, an inlet of the first channel part is positioned on the axial end face of the shell, and the second channel part is communicated with the extending tail end of the first channel part; the buckling protrusion is positioned in the second channel part and is in limit fit with the shell in the axial direction;

after the cover body rotates relative to the shell, the buckling protrusion can withdraw from the buckling concave position through the first channel part.

3. The water pump seal assembly of claim 2, wherein:

a first limit structure is arranged in the second channel part, a second limit structure is arranged on the buckling protrusion, one of the first limit structure and the second limit structure is a limit protrusion, and the other of the first limit structure and the second limit structure is a limit recess;

the first limiting structure and the second limiting structure are in circumferential limiting fit to prevent the buckling protrusion from exiting the second channel portion.

4. A water pump seal assembly as claimed in claim 3, wherein:

the limiting protrusion is provided with an arc outer surface, and/or the limiting concave position is provided with an arc inner surface;

the peripheral wall and/or the housing has an elastic deformability.

5. The water pump seal assembly according to any one of claims 2 to 4, wherein:

a first guiding inclined surface is arranged in the second channel part and faces the buckling protrusion, the first guiding inclined surface comprises a first guiding initial end and a first guiding tail end, the first guiding tail end is far away from the first channel part than the first guiding initial end in the circumferential direction, and the first guiding tail end is far away from the inlet than the first guiding initial end in the axial direction;

and/or, be equipped with the second direction inclined plane on the lock arch, the second direction inclined plane is towards the interior wall surface setting of lock concave position, the second direction inclined plane includes second direction initial end and second direction terminal in the circumference, the second direction terminal is than the second direction initial end is kept away from first channel portion, in the axial, the second direction terminal is than the second direction initial end is kept away from the entry.

6. The water pump seal assembly according to any one of claims 2 to 4, wherein:

the periphery of the shell is provided with a lightening hole, the shell comprises an axial blocking wall and a circumferential blocking wall, the axial blocking wall is arranged adjacent to the lightening hole in the axial direction, and the circumferential blocking wall is arranged adjacent to the lightening hole in the circumferential direction;

the buckling protrusion comprises a first portion and a second portion, the first portion protrudes from the axial blocking wall along the radial direction of the shell, and the second portion protrudes from the circumferential blocking wall along the radial direction of the shell.

7. The water pump seal assembly of claim 6, wherein:

on the projection of the protruding direction of the buckling protrusion, a step shape is arranged between the first part and the second part, and the inner contour of the second channel part is in a step shape.

8. The water pump seal assembly according to any one of claims 1 to 4, wherein:

the shell and/or the cover body are/is molded by plastic.

9. The water pump seal assembly of claim 8, wherein:

the threaded connecting piece is a screw, a through hole is formed in the peripheral wall, and a connecting hole is formed in the shell;

the screw passes through the through hole and is matched with the connecting hole.

10. The water pump seal assembly of claim 9, wherein:

the number of the through holes and the connecting holes is greater than that of the screws.

11. The water pump, including water pump seal assembly, its characterized in that:

the water pump seal assembly employs the water pump seal assembly of any one of the preceding claims 1 to 10.

12. Household appliance, including the water pump, its characterized in that:

the water pump of claim 11 is used.

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