CN210686296U

CN210686296U - Oil leakage prevention structure of draining pump

Info

Publication number: CN210686296U
Application number: CN201921623562.6U
Authority: CN
Inventors: 王夏春; 王奔
Original assignee: Wuxi Haoli Pumps Industrial Co ltd
Current assignee: Wuxi Haoli Pumps Industrial Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-06-05
Anticipated expiration: 2029-09-26

Abstract

The utility model belongs to the technical field of the drain pump motor, concretely relates to drain pump leak protection oil structure, including the pot head, the pot head inlays closely and establishes in the pivot chamber of rotor chamber bottom, and the inside oil storage chamber that forms of pot head, rotor rear axle stretch into the oil storage chamber, and the rotor rear axle is mobile in the oil storage chamber to be set up, and the hole and the rotor rear axle external diameter contact of pot head set up, and the terminal surface of rotor rear axle sets up with the bottom surface interval in oil storage chamber. The utility model discloses reduce the wearing and tearing to the rotor chamber of drain pump and pivot chamber, pot head simple structure, convenient the change during wearing and tearing, the oil leak phenomenon that the plastic envelope casing oil impregnate of the BMC resin material in effectively avoiding the pivot chamber arouses prolongs drain pump life, reduces drain pump cost of maintenance.

Description

Oil leakage prevention structure of draining pump

Technical Field

The utility model belongs to the technical field of the drain pump motor, concretely relates to drain pump leak protection oil structure.

Background

There are known household drain pumps comprising a pump body, a rotor and a stator. The stator has a rotor cavity, wherein the electronics rotor is mounted inside the rotor cavity of the stator. The center of the bottom of the rotor cavity is provided with a rotating shaft cavity for the rear shaft of the motor rotor to extend into. Generally, in order to ensure the rotational lubricity of the rear shaft of the motor rotor in the rotating shaft cavity, lubricating oil is added into the rotating shaft cavity. The plastic package shell of general pivot chamber is BMC resin material, and the cost that drain pump can effectively be reduced to BMC resin material low price, but its material is not grease proof, and lubricating oil can ooze through the plastic package shell, finally produces lubricating oil light leak phenomenon. The oil leakage can deepen the friction force between the rotor and the stator and generate noise, thereby reducing the service life of the drainage pump and influencing the use.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a drain pump leak protection oil structure, the purpose is for solving among the prior art drain pump the plastic envelope shell in pivot chamber for grease proofing BMC resin material not, guarantees that the lubricating oil of electric motor rotor rear axle rotational lubrication nature can ooze through the plastic envelope shell, makes the rotor rear axle rotate and produces the frictional noise, influences the use, causes the technical problem of drain pump working life's reduction.

The utility model provides a drain pump leak protection oil structure, concrete technical scheme is as follows:

drain pump leak protection oil structure, including the pot head, the pot head inlays closely and establishes in the pivot chamber of rotor chamber bottom, the inside oil storage chamber that forms of pot head, rotor backshaft stretch into the oil storage chamber, the rotor backshaft is in mobile setting in the oil storage chamber, the hole of pot head with rotor backshaft external diameter contacts the setting, the terminal surface of rotor backshaft with the bottom surface interval in oil storage chamber sets up.

In some embodiments, the end cap includes a supporting sleeve, a rubber sleeve, and a sleeve, the rubber sleeve is tightly sleeved on the supporting sleeve, the sleeve is tightly sleeved on the rubber sleeve, and the sleeve is disposed in the rotating shaft cavity.

In some embodiments, the upper end of the support sleeve is provided with an annular support platform, the diameter of the annular support platform is larger than that of the rotating shaft cavity, and the annular support platform is arranged above the rotating shaft cavity and is tightly attached to the bottom surface of the rotor cavity.

In some embodiments, the bottom end of the rubber sleeve extends radially to form a fixed ring, and the inner diameter of the fixed ring is smaller than that of the support sleeve.

In some embodiments, the casing port is uniformly provided with a plurality of grooves, and the depth of each groove is smaller than the height of the rubber sleeve.

The utility model discloses following beneficial effect has: the utility model provides a drain pump leak protection oil structure, simple structure, the convenient change, the pot head inlays closely and establishes in the pivot chamber, forms the oil storage chamber, avoids lubricating oil to flow into the pivot chamber to spill from the plastic envelope casing of the BMC resin material in pivot chamber. The rotor rear shaft rotates in the end sleeve, and rotational friction is generated between the rotor rear shaft and the end sleeve, so that the wall surface of the rotating shaft cavity is effectively prevented from being abraded. The change convenience when the pot head is worn and torn, the oil leak phenomenon that effectively avoids the plastic envelope casing oil seepage of the BMC resin material in pivot chamber to arouse prolongs drain pump life, reduces drain pump cost of maintenance.

Drawings

Fig. 1 is a schematic plan view of an oil leakage preventing structure of a drain pump according to the present invention;

fig. 2 is a schematic perspective view of the end cap of the present invention;

fig. 3 is a schematic perspective view of the end cap of the present invention;

fig. 4 is a schematic perspective view of the support sleeve of the present invention;

fig. 5 is a schematic perspective view of the rubber sleeve of the present invention;

fig. 6 is a schematic perspective view of the casing of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings 1-6.

drain pump leak protection oil structure, including pot head 1, pot head 1 inlays closely and establishes in the pivot chamber 3 of rotor chamber 2 bottom, and pot head 1 can not be driven by the rotor shaft and rotate in pivot chamber 3. An oil storage cavity 14 is formed inside the end sleeve 1, and the oil storage cavity 14 is used for storing lubricating oil. Rotor rear axle 4 stretches into oil storage chamber 14, and rotor rear axle 4 is mobile to be set up in oil storage chamber 14, the hole of end cover 1 with rotor rear axle 4 external diameter contact sets up, and the inner wall side of oil storage chamber 14 and the contact of rotor rear axle 4 outer wall side set up promptly. Rotor rear shaft 4 rotates in end cover 1, and the setting of contacting with 1 inner wall side of end cover guarantees at the stability of rotor pivot in the rotation, avoids arousing rotatory deviation. The end face of the rotor rear shaft 4 and the bottom face of the oil storage cavity 14 are arranged at intervals, so that the contact with the bottom of the end sleeve 1 is reduced, and the probability of abrasion of the rotor rear shaft 4 to the bottom of the end sleeve 1 is reduced. The end sleeve 1 is arranged between the rotor rotating shaft and the rotating shaft cavity 3, so that abrasion of the rotor to the side wall of the rotating shaft cavity 3 is blocked, a lubricating oil storage space is formed, the possibility that lubricating oil seeps out from the rotating shaft cavity 3 is effectively prevented, and the oil leakage probability of the drainage pump is greatly reduced.

In some embodiments, the end sleeve 1 comprises a supporting sleeve 11, a rubber sleeve 12 and a casing 13, wherein the rubber sleeve 12 is tightly sleeved on the supporting sleeve 11, the casing 13 is tightly sleeved on the rubber sleeve 12, and the casing 13 is arranged in the rotating shaft cavity 3. The rubber sleeve 12 is arranged between the supporting sleeve 11 and the sleeve shell 13, the friction force between the supporting sleeve 11 and the sleeve shell 13 is increased to prevent the end sleeve 1 from being driven by the rotating shaft, and meanwhile, the sealing performance is increased to prevent lubricating oil from flowing into the rotating shaft cavity 3.

In some embodiments, the upper end of the support sleeve 11 is provided with an annular support base 111, and the diameter of the annular support base 111 is larger than that of the rotating shaft cavity 3, and is disposed on the port of the rotating shaft cavity 3 and closely attached to the bottom surface of the rotor cavity 2. Like this, cyclic annular supporting bench 111 supports the rotor, realizes the rotor and sets up with the interval of rotor chamber 2 bottom surface, avoids the rotor to rotate the wearing and tearing to the bottom surface of rotor chamber 2 to further prevent lubricating oil inflow pivot chamber 3.

In some embodiments, the bottom end of the rubber sleeve 12 extends radially to form a fixed ring 121, and the inner diameter of the fixed ring 121 is smaller than the inner diameter of the support sleeve. The fixing ring 121 is contacted with the bottom of the supporting sleeve 11, and the rubber sleeve 12 is ensured not to be displaced by self friction force.

In some embodiments, the housing 13 has a plurality of grooves 131 uniformly formed at the end thereof, and the depth of the grooves 131 is smaller than the height of the rubber sleeve 12. Thus, the support sleeve 11 and the rubber sleeve 12 are convenient to disassemble and assemble.

To sum up, the utility model provides an embodiment of drain pump leak protection oil structure general as follows: the rubber sleeve 12 is sleeved on the supporting sleeve 11, the sleeve shell 13 is sleeved on the rubber sleeve 12, the end sleeve 1 is assembled in this way, an oil storage cavity 14 is formed inside the end sleeve 1, the end sleeve 1 is inserted into the rotating shaft cavity 3, and the supporting table is tightly attached to the bottom surface of the rotor cavity 2. The oil storage chamber 14 is filled with lubricating oil, the rear end of the rotating shaft of the rotor is arranged in the end sleeve 1, and the rotor and the bottom surface of the rotor chamber 2 are arranged at intervals through an annular support platform 111. So, reduce the wearing and tearing to the rotor chamber 2 and the pivot chamber 3 of drain pump, pot head 1 simple structure, convenient change during wearing and tearing effectively blocks the oil leak phenomenon that the plastic envelope casing oil seepage of the BMC resin material in pivot chamber 3 arouses, extension drain pump life reduces drain pump cost of maintenance.

The above-mentioned only the utility model discloses the feasible embodiment of preferred is not right the utility model discloses a restriction, the utility model discloses also not be limited to the above-mentioned example, technical field's technical personnel the utility model discloses an in the essential scope, change, modification, interpolation or replacement made also should belong to the utility model discloses a protection scope.

Claims

1. Drain pump leak protection oil structure, its characterized in that includes the pot head, the pot head inlays closely and establishes in the pivot chamber of rotor chamber bottom, the inside oil storage chamber that forms of pot head, the rotor rear axle stretches into the oil storage chamber, the rotor rear axle is in but mobile setting in the oil storage chamber, the hole of pot head with the contact of rotor rear axle external diameter sets up, the terminal surface of rotor rear axle with the bottom surface interval in oil storage chamber sets up.

2. A drain pump oil leakage prevention structure according to claim 1, wherein the end cap includes a support cap, a rubber cap, and a sleeve, the rubber cap tightly fits over the support cap, the sleeve tightly fits over the rubber cap, and the sleeve is disposed in the rotation shaft cavity.

3. A drain pump oil leakage prevention structure according to claim 2, wherein an annular support table is provided at an upper end of the support sleeve, and has a diameter larger than that of the rotation shaft chamber, is provided above the rotation shaft chamber, and is closely attached to a bottom surface of the rotor chamber.

4. A drain pump oil leakage prevention structure according to claim 2, wherein the rubber bushing has a bottom end extended radially to form a fixing ring having an inner diameter smaller than that of the support bushing.

5. A drain pump oil leakage prevention structure according to claim 2, wherein the casing port is formed with a plurality of grooves uniformly, and a depth of the grooves is smaller than a height of the rubber sleeve.