CN117559699A - Protective cover, protective assembly and motor - Google Patents
Protective cover, protective assembly and motor Download PDFInfo
- Publication number
- CN117559699A CN117559699A CN202311519911.0A CN202311519911A CN117559699A CN 117559699 A CN117559699 A CN 117559699A CN 202311519911 A CN202311519911 A CN 202311519911A CN 117559699 A CN117559699 A CN 117559699A
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- China
- Prior art keywords
- mounting hole
- protective cover
- hole
- motor
- chute
- Prior art date
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- 230000001681 protective effect Effects 0.000 title claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000013049 sediment Substances 0.000 claims abstract description 38
- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 39
- 238000007599 discharging Methods 0.000 claims description 15
- 230000004224 protection Effects 0.000 abstract description 34
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/124—Sealing of shafts
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention provides a protective cover, a protective assembly and a motor, wherein the motor comprises an end cover, an output shaft and a coupler, the end cover is provided with an end cover hole, and the output shaft is arranged in the end cover hole in a penetrating way; the shaft coupling is provided with a shaft connecting end which is connected with the output shaft; the protective cover is arranged on the end cover and is provided with a first mounting hole, the first mounting hole is provided with a shaft connecting end, and the hole wall of the first mounting hole is in clearance fit with the outer peripheral wall of the shaft connecting end; the protective cover replaces a cover plate in the prior art, and a gap between the hole wall of the first mounting hole and the peripheral wall of the shaft connecting end can prevent most of outside water and/or sediment from entering the motor through the oil seal; the protection structure of the motor is optimized, the protection mode of the motor is increased, the protection level of the motor is improved, the abrasion loss and failure speed of the oil seal are reduced, the problem that the protection structure of the motor in the prior art is unreasonable in design, the oil seal is easy to abrade and the failure speed is high, and then motor faults are caused is solved.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a protective cover, a protective assembly and a motor.
Background
Along with the development of economy and society, new energy automobiles are widely applied to production and life; reliable operation of the motor is a key for ensuring normal running of the new energy automobile, so the motor is particularly important to the protection of the motor; the motor on the general automobile is exposed, and the axial direction of the motor coupler is consistent with the running direction of the automobile; when the automobile runs under severe road conditions, water and/or sediment easily enter the motor to cause motor faults; in the prior art, a motor is sealed by an oil seal and a cover plate, an end cover is provided with an end cover hole, a rotor shaft is arranged on the end cover hole in a penetrating way, the oil seal is arranged between the end cover holes of the rotor shaft, and the cover plate is arranged on one side of the end cover; but the clearance between apron and the rotor shaft is great, and external water and/or silt easily enter into oil blanket department through this clearance, aggravate the wearing and tearing of oil blanket and rotor shaft, make the oil blanket accelerate inefficacy, and the motor breaks down because of losing safeguard.
Disclosure of Invention
In view of the above, the invention provides a protective cover, a protective assembly and a motor, which are used for solving the problems that in the prior art, the design of a protective structure of the motor is unreasonable, an oil seal is easy to wear and has high failure speed, and motor faults are caused.
The invention provides a protective cover for a motor; the motor comprises an end cover, an output shaft and a coupler, wherein an end cover hole is formed in the end cover, and the output shaft is arranged in the end cover hole in a penetrating mode; the shaft coupling is provided with a shaft connecting end which is connected with the output shaft; the protective cover is arranged on the end cover and is provided with a first mounting hole, and the first mounting hole is used for arranging the shaft connecting end;
and under the condition that the first mounting hole is provided with the shaft connecting end, the hole wall of the first mounting hole is in clearance fit with the outer peripheral wall of the shaft connecting end.
Further alternatively, the following is satisfied: s1 is more than or equal to 0.8mm and less than or equal to 1.2mm;
and s1 is the radial distance between the hole wall of the first mounting hole and the outer peripheral wall of the shaft connecting end.
Further alternatively, a first chute is formed on the lower side of the hole wall of the first mounting hole, and the first chute is used for collecting and discharging water and/or sediment;
in the case where the first mounting hole is provided with the shaft connecting end, the first chute extends obliquely downward from the end cover to the shaft connecting end.
Further optionally, the protective cover is further provided with a second mounting hole, the second mounting hole and the first mounting hole are coaxially arranged, and the second mounting hole is used for arranging a sealing ring;
and under the condition that the second mounting hole is provided with the sealing ring, the hole wall of the second mounting hole is in clearance fit with the outer peripheral wall of the sealing ring.
Further alternatively, the following is satisfied: s2 is more than or equal to 0.2mm and less than or equal to 0.3mm;
and s2 is the radial distance between the hole wall of the second mounting hole and the peripheral wall of the sealing ring.
Further alternatively, a second chute is formed on the lower side of the hole wall of the second mounting hole, the second chute extends downwards in a slanting manner from the second mounting hole to the first mounting hole, and the second chute is used for collecting and discharging water and/or sediment.
Further optionally, the protective cover comprises a boss and a protective cover plate, and the boss is arranged on the protective cover plate; the boss is provided with the first mounting hole, and the protective cover plate is provided with the second mounting hole;
the protective cover plate is further formed with a storage groove which is positioned on the outer peripheral side of the second mounting hole; the holding tank is used for collecting and discharging water and/or sediment.
Further optionally, an oil seal is formed between the output shaft and the end cover; under the condition that the protective cover is arranged on the end cover, one end, close to the first mounting hole, of the storage groove is closed, one end, close to the oil seal, of the storage groove is opened, and the lowest position of the storage groove is lower than the lowest position of the oil seal.
Further alternatively, the protective cover plate is further formed with a drain hole provided at the bottom of the storage groove; the discharge hole is communicated with the storage tank and is used for discharging water and/or sediment in the storage tank.
Further alternatively, the discharge hole is a threaded hole, and the threaded hole is provided with a locking screw.
Further optionally, the protective cover plate is further provided with a third mounting hole, the third mounting hole and the second mounting hole are coaxially arranged, and the third mounting hole, the second mounting hole and the first mounting hole are sequentially arranged; a third chute is formed at the lower side of the hole wall of the third mounting hole; the third chute extends downwards in a tilting manner from the third mounting hole to the second mounting hole, and the highest position of the third chute is lower than the lowest position of the inner side wall of the oil seal; the third inclined groove is used for collecting and discharging water and/or sediment overflowed from the storage groove.
Further alternatively, water and/or sediment at the oil seal may be discharged through the storage tank, the third chute, the second chute, and the first chute in this order, and it is satisfied that: d1 > d2 > d3;
wherein d1 is the aperture of the first mounting hole, d2 is the aperture of the second mounting hole, and d3 is the aperture of the third mounting hole.
The invention also provides a protective component for the motor; the protective assembly comprises a sealing ring and a protective cover of any one of the above; the protective cover is arranged on the end cover, the protective cover and the coupler are positioned on the same side of the end cover, and the shaft connecting end is arranged in the first mounting hole in a penetrating manner; the sealing ring is sleeved on the output shaft and is in interference fit with the output shaft; the sealing ring is arranged in the second mounting hole, and a V-shaped structure is formed on the outer periphery side of the sealing ring; the V-shaped structure is in contact with the hole wall of the second mounting hole.
The invention also provides a motor, which comprises an end cover, an output shaft, a coupler and the protection component; the end cover is provided with an end cover hole, and the output shaft is arranged in the end cover hole in a penetrating way; the shaft coupling is provided with a shaft connecting end which is connected with the output shaft; the protective cover is arranged on the end cover, the shaft connecting end is arranged in the first mounting hole, and the sealing ring is arranged between the second mounting hole and the output shaft.
Compared with the prior art, the invention has the following main beneficial effects:
the protective cover replaces a cover plate in the prior art, a first mounting hole is formed in the protective cover, a shaft connecting end of the coupler is arranged at the first mounting hole, the hole wall of the first mounting hole is in clearance fit with the outer peripheral wall of the shaft connecting end, and most of outside water and/or sediment is prevented from entering the motor through an oil seal; the protection structure of the motor is optimized, the protection mode of the motor is increased, the protection level of the motor is improved, the abrasion loss and failure speed of the oil seal are reduced, the problem that the protection structure of the motor in the prior art is unreasonable in design, the oil seal is easy to abrade and the failure speed is high, and then motor faults are caused is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
Fig. 1a is a schematic structural diagram of an embodiment of a motor provided by the present invention;
FIG. 1b is an enlarged view of FIG. 1a at A;
FIG. 1c is a schematic view of an embodiment of a water and/or silt removal path for an electric motor according to the present invention;
fig. 2a is a schematic front view of a protective cover according to an embodiment of the present invention;
FIG. 2B is a cross-sectional view taken at B-B of FIG. 2 a;
FIG. 2c is a schematic left-view diagram of a protective cover according to an embodiment of the present invention;
FIG. 2d is a cross-sectional view taken at C-C of FIG. 2C;
FIG. 3 is a schematic diagram of an embodiment of a prior art motor;
in the figure:
11-end caps; 12-an output shaft; 13-a coupling; 131-shaft connection end; 14-a bearing;
2-a protective cover; 21-a boss; 211-a first mounting hole; 212-a first chute; 22-protective cover plate; 221-a second mounting hole; 222-a second chute; 223-third mounting hole; 224-a third chute; 225-a storage tank; 226-discharge holes;
31-a sealing ring; 32-oil seal; 41-cover plate.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
As shown in fig. 3, in the prior art, a motor is sealed by an oil seal and a cover plate, an end cover is provided with an end cover hole, a rotor shaft is arranged on the end cover hole in a penetrating way, the oil seal is arranged between the end cover holes of the rotor shaft, and the cover plate is arranged on one side of the end cover; however, the gap between the cover plate and the rotor shaft is larger, and external water and/or sediment easily enter the oil seal through the gap, so that abrasion of the oil seal and the rotor shaft is increased, the oil seal is accelerated to fail, and the motor fails due to the loss of protective measures;
the invention creatively provides a protective cover for a motor; the motor comprises an end cover, an output shaft and a coupler, wherein an end cover hole is formed in the end cover, and the output shaft is arranged in the end cover hole in a penetrating mode; the shaft coupling is provided with a shaft connecting end which is connected with the output shaft; the protective cover is arranged on the end cover and is provided with a first mounting hole, and the first mounting hole is used for arranging the shaft connecting end; under the condition that the first mounting hole is provided with a shaft connecting end, the hole wall of the first mounting hole is in clearance fit with the peripheral wall of the shaft connecting end;
the protective cover replaces a cover plate in the prior art, and a gap between the hole wall of the first mounting hole and the peripheral wall of the shaft connecting end can prevent most of outside water and/or sediment from entering the motor through the oil seal; the protection structure of the motor is optimized, the protection mode of the motor is increased, the protection level of the motor is improved, the abrasion loss and failure speed of the oil seal are reduced, the problem that the protection structure of the motor in the prior art is unreasonable in design, the oil seal is easy to abrade and the failure speed is high, and then motor faults are caused is solved.
< protective cover >
As shown in fig. 1a to 2d, the present embodiment provides a protective cover 2 for a motor; the motor comprises an end cover 11, an output shaft 12 and a coupler 13, wherein the end cover 11 is provided with an end cover hole, and the output shaft 12 is arranged in the end cover hole in a penetrating way; the coupling 13 is formed with a shaft connection end 131, and the shaft connection end 131 is connected with the output shaft 12; the protective cover 2 comprises a protective cover plate 22 and a boss 21, wherein the protective cover plate 22 is arranged on the end cover 11, and the boss 21 is arranged on the protective cover plate 22; the boss 21 is formed with a first mounting hole 211, the first mounting hole 211 being for providing the shaft connecting end 131;
in the case where the first mounting hole 211 is provided with the shaft connecting end 131, the hole wall of the first mounting hole 211 is clearance-fitted with the outer peripheral wall of the shaft connecting end 131;
further, the following are satisfied: s1 is more than or equal to 0.8mm and less than or equal to 1.2mm; preferably, s1=1 mm; where s1 is a radial distance between the wall of the first mounting hole 211 and the outer peripheral wall of the shaft connecting end 131.
In order to solve the problem that water and/or sediment left between the wall of the first mounting hole 211 and the outer circumferential wall of the shaft connection end 131 is not easily discharged, the present embodiment proposes that the lower side of the wall of the first mounting hole 211 is formed with a first chute 212, and the first chute 212 is used for collecting and discharging water and/or sediment left between the wall of the first mounting hole 211 and the outer circumferential wall of the shaft connection end 131 so that water and/or sediment will not be left in the gap between the wall of the first mounting hole 211 and the outer circumferential wall of the shaft connection end 131; in the case where the first mounting hole 211 is provided with the shaft connecting end 131, the first chute 212 extends obliquely downward from the end cover 11 to the shaft connecting end 131;
when the motor operates, the coupler 13 and the output shaft 12 synchronously rotate, a small amount of water and sediment infiltrate from a gap between the hole wall of the first mounting hole 211 and the outer peripheral wall of the shaft connecting end 131, and then are thrown by the rotating coupler 13, enter the first chute 212 along the hole wall of the first mounting hole 211 and are discharged; the gap between the wall of the first mounting hole 211 and the outer circumferential wall of the shaft connecting end 131 can block most of water and/or silt, thereby providing a first protection.
Aiming at the problem that the protection level of the motor is low, so that the sealing of the motor is not tight, the embodiment provides that the protection cover plate 22 is formed with a second mounting hole 221, the second mounting hole 221 and the first mounting hole 211 are coaxially arranged, and the second mounting hole 221 is used for arranging a sealing ring 31; in the case where the second mounting hole 221 is provided with the seal ring 31, the wall of the second mounting hole 221 is clearance-fitted with the outer peripheral wall of the seal ring 31;
further, the following are satisfied: s2 is more than or equal to 0.2mm and less than or equal to 0.3mm; preferably, s2=0.25 mm;
where s2 is the radial distance between the wall of the second mounting hole 221 and the outer peripheral wall of the seal ring 31.
In order to solve the problem that water and/or sediment remaining between the wall of the second mounting hole 221 and the outer peripheral wall of the sealing ring 31 is not easily discharged, the present embodiment proposes that a second chute 222 is formed at the lower side of the wall of the second mounting hole 221, the second chute 222 extends obliquely downward from the second mounting hole 221 to the first mounting hole 211, and the second chute 222 is used for collecting and discharging water and/or sediment remaining between the wall of the second mounting hole 221 and the outer peripheral wall of the sealing ring 31;
the gap between the wall of the second mounting hole 221 and the outer peripheral wall of the sealing ring 31 can block most of water, substantially completely isolate sediment, and play a second protection role.
Aiming at the problem that water and/or sediment remained at the oil seal 32 is not easy to drain, the embodiment proposes that the oil seal 32 is formed between the output shaft 12 and the end cover 11; the shield cover 22 is also formed with a storage groove 225, the storage groove 225 being located at the outer peripheral side of the second mounting hole 221; the storage tank 225 is used for collecting and discharging water and/or sediment; with the shield cover 2 provided on the end cover 11, one end of the storage groove 225 close to the first mounting hole 211 is closed, one end of the storage groove 225 close to the oil seal 32 is opened, and the lowest position of the storage groove 225 is lower than the lowest position of the oil seal 32;
the storage groove 225 is of an annular structure, the upper half part of the storage groove 225 is positioned at the oil seal 32, and the lower half part of the storage groove 225 is contacted with the end face of the end cover 11; when the external water breaks through the first and second protections and enters the oil seal 32, the water enters the storage groove 225 due to the low position of the storage groove 225 and is accumulated; when the water in the storage tank 225 is accumulated to some extent, the water overflows from the storage tank 225 into the third chute 224 to be discharged to the outside of the motor.
In addition, the protective cover 22 is further formed with a third mounting hole 223, the third mounting hole 223 and the second mounting hole 221 are coaxially provided, and the third mounting hole 223, the second mounting hole 221 and the first mounting hole 211 are provided in order, and satisfy: d1 > d2 > d3;
where d1 is the aperture of the first mounting hole 211, d2 is the aperture of the second mounting hole 221, and d3 is the aperture of the third mounting hole 223
A third inclined groove 224 is formed at the lower side of the hole wall of the third mounting hole 223; the third inclined groove 224 extends obliquely downward from the third mounting hole 223 to the second mounting hole 221, and the highest position of the third inclined groove 224 is lower than the lowest position of the inner side wall of the oil seal 32; the third chute 224 is used for collecting and discharging water and/or sediment overflowed from the storage tank 225;
the water in the oil seal 32 accumulates in the storage tank 225, and when the water in the storage tank 225 accumulates to a certain extent, the water flows through the third chute 224, the second chute 222 and the first chute 212 in sequence to be discharged; the storage groove 225 and the third diagonal groove 224 serve as a third shield.
Further, the shield cover 22 is further formed with a discharge hole 226, and the discharge hole 226 is provided at the bottom of the storage tank 225; one end of the discharge hole 226 is communicated with the storage tank 225, the other end of the discharge hole 226 is communicated with the outside, and the discharge hole 226 is used for discharging water and/or sediment in the storage tank 225;
preferably, the discharge hole 226 is a threaded hole provided with a locking screw.
When the automobile runs for a period of time or is waded in severe weather, the locking screw can be unscrewed to check whether water enters the protective cover 2, if so, the water in the storage tank 225 can be discharged in time to play a fourth protection role; after the locking screw is unscrewed, whether the sealing ring 31 fails or not can be judged according to the actual condition of water inflow or not, and whether replacement is needed or not is judged, so that the service life of the oil seal 32 and the reliability of the motor are improved.
Four protections are designed in this embodiment: (1) the gap between the wall of the first mounting hole 211 and the outer peripheral wall of the shaft connecting end 131 can block most of water and/or sediment, thereby playing a first protection role; (2) the gap between the wall of the second mounting hole 221 and the peripheral wall of the sealing ring 31 can block most of water, so that sediment is basically completely isolated, and a second protection is achieved; (3) the storage groove 225 and the third diagonal groove 224 serve as a third guard; (4) the water in the storage tank 225 can be discharged in time through the discharge hole 226, so that the fourth protection is realized; the protection structure of the motor is optimized, the protection mode of the motor is increased, the protection level of the motor is improved, the abrasion loss and failure speed of the oil seal are reduced, the problem that the protection structure of the motor in the prior art is unreasonable in design, the oil seal is easy to abrade and the failure speed is high, and then motor faults are caused is solved.
< protective Assembly >
The embodiment also provides a protection component for the motor; the protective assembly comprises a sealing ring 31 and a protective cover 2 according to any one of the above; the motor comprises an end cover 11, an output shaft 12 and a coupler 13, wherein the end cover 11 is provided with an end cover hole, and the output shaft 12 is arranged in the end cover hole in a penetrating way; the coupling 13 is formed with a shaft connection end 131, and the shaft connection end 131 is connected with the output shaft 12; the protective cover 2 is arranged on the end cover 11, the protective cover 2 and the coupler 13 are positioned on the same side of the end cover 11, and the shaft connecting end 131 is penetrated in the first mounting hole 211; the sealing ring 31 is sleeved on the output shaft 12, and the sealing ring 31 is in interference fit with the output shaft 12; the seal ring 31 is disposed in the second mounting hole 221 and a V-shaped structure is formed at an outer circumferential side of the seal ring 31; the V-shaped structure contacts the hole wall of the second mounting hole 221; specifically, the inner diameter of the sealing ring 31 can be enlarged, so that the sealing ring 31 can firmly wrap the output shaft 12 and synchronously rotate with the output shaft 12; the V-shaped structure is resistant to high temperature and abrasion and is in close contact with the hole wall of the second mounting hole 221; the water stays in the V-shaped structure and is thrown up under the rotation of the sealing ring 31, and then enters the second chute 222 along the hole wall of the second mounting hole 221 and is discharged; the sealing ring 31 is a wearing part, whether the automobile needs to be replaced or not can be confirmed according to the actual running condition of the automobile, the replacement of the sealing ring 31 arm and the oil seal 32 is simple, and the after-sale maintenance cost is reduced.
The sealing ring 31 is made of high-temperature-resistant rubber, and the bearable temperature of the sealing ring 31 is T which is more than or equal to 150 ℃.
In summary, the structure of the protecting cover 2 is optimized, and a plurality of protections are formed by combining the sealing ring 31 and the oil seal 32, so that most of water and/or sediment is prevented from entering the motor through the oil seal 32; the protection capability of the motor is greatly improved, and the protection level of the motor is improved; when an automobile runs in severe weather or under road conditions, the motor may face to be splashed by accumulated water or sediment from various directions; specifically, the cooperation of the first mounting hole 211 and the shaft connecting end 131 can isolate most of the impact of water and sediment, so that sediment is difficult to enter; the second mounting hole 221 and the sealing ring 31 cooperate to also isolate most of the water and completely isolate the sediment, so that the oil seal 32 is not impacted or splashed by the water or the sediment; the protective cover 2 is provided with a plurality of chute and storage tank 225, which can timely discharge the water permeated into the motor; and then can let the oil blanket 32 be in the relatively better environment of operating mode work all the time, improved the life of oil blanket 32 and guaranteed gas tightness, the reliability of motor.
< Motor >
The embodiment also provides a motor, which comprises an end cover 11, an output shaft 12, a coupler 13 and the protection component; the end cover 11 is provided with an end cover hole, and the output shaft 12 is penetrated in the end cover hole; the coupling 13 is formed with a shaft connection end 131, and the shaft connection end 131 is connected with the output shaft 12; the protective cover 2 is disposed on the end cover 11, the shaft connecting end 131 is disposed in the first mounting hole 211, and the seal ring 31 is disposed between the second mounting hole 221 and the output shaft 12.
As shown in fig. 3, in the prior art, a scheme of using an oil seal 32 and a cover plate 41 is adopted, a temperature difference is generated between the inside and the outside of the motor due to operation temperature rise, and then a pressure difference is generated, a pumping effect is formed at the oil seal 32, when the motor works in a severe environment, external water or sediment impacts the oil seal 32, the pumping effect is aggravated, and because the oil seal 32 has no enough protective measures, the pumping effect can give the external water or sediment to a bearing chamber sucked into the motor, and the bearing chamber is provided with a bearing 14, so that the bearing 14 is rusted and necrotized;
as shown in fig. 1a to 1c, the protective cover 2, the sealing ring 31 and the oil seal 32 of the present invention, the protective cover 2 and the sealing ring 31 directly block the water and the sediment of the external impact, the oil seal 32 is not impacted by the external water and the sediment, even if a small amount of water permeates, the water can flow out in time from the storage tank 225 and the plurality of inclined slots of the protective cover 2 after being thrown up along with the rotation of the output shaft 12; even if the temperature rises after the motor is operated, the pumping effect at the oil seal 32 is very little, and the pumping effect is not sucked into the motor, so that the protection effect of the motor is improved, the service life of the motor is prolonged, and the quality assurance requirement of 40 ten thousand kilometers in 8 years can be met.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (14)
1. A protective cover for a motor; the motor comprises an end cover, an output shaft and a coupler, wherein an end cover hole is formed in the end cover, and the output shaft is arranged in the end cover hole in a penetrating mode; the shaft coupling is provided with a shaft connecting end which is connected with the output shaft; the protective cover is arranged on the end cover and is provided with a first mounting hole, and the first mounting hole is used for arranging the shaft connecting end;
and under the condition that the first mounting hole is provided with the shaft connecting end, the hole wall of the first mounting hole is in clearance fit with the outer peripheral wall of the shaft connecting end.
2. The protective cover according to claim 1, characterized in that: s1 is more than or equal to 0.8mm and less than or equal to 1.2mm;
and s1 is the radial distance between the hole wall of the first mounting hole and the outer peripheral wall of the shaft connecting end.
3. The protective cover according to claim 1, wherein a first chute is formed at the lower side of the wall of the first mounting hole, and the first chute is used for collecting and discharging water and/or sediment;
in the case where the first mounting hole is provided with the shaft connecting end, the first chute extends obliquely downward from the end cover to the shaft connecting end.
4. The protective cover according to claim 2, further forming a second mounting hole coaxially disposed with the first mounting hole, the second mounting hole for disposing a seal ring;
and under the condition that the second mounting hole is provided with the sealing ring, the hole wall of the second mounting hole is in clearance fit with the outer peripheral wall of the sealing ring.
5. The protective cover of claim 4, wherein: s2 is more than or equal to 0.2mm and less than or equal to 0.3mm;
and s2 is the radial distance between the hole wall of the second mounting hole and the peripheral wall of the sealing ring.
6. The protective cover according to claim 4, wherein a second chute is formed at a lower side of a wall of the second mounting hole, the second chute extends obliquely downward from the second mounting hole to the first mounting hole, and the second chute is used for collecting and discharging water and/or silt.
7. The protective cover of claim 4, wherein the protective cover comprises a boss and a protective cover plate, the boss being disposed on the protective cover plate; the boss is provided with the first mounting hole, and the protective cover plate is provided with the second mounting hole;
the protective cover plate is further formed with a storage groove which is positioned on the outer peripheral side of the second mounting hole; the holding tank is used for collecting and discharging water and/or sediment.
8. The protective cover of claim 7, wherein an oil seal is formed between the output shaft and the end cap; under the condition that the protective cover is arranged on the end cover, one end, close to the first mounting hole, of the storage groove is closed, one end, close to the oil seal, of the storage groove is opened, and the lowest position of the storage groove is lower than the lowest position of the oil seal.
9. The protective cover according to claim 8, wherein the protective cover plate is further formed with a discharge hole provided at a bottom of the storage groove; the discharge hole is communicated with the storage tank and is used for discharging water and/or sediment in the storage tank.
10. The protective cover according to claim 9, wherein the discharge hole is a threaded hole provided with a locking screw.
11. The protective cover of claim 8, wherein the protective cover plate is further formed with a third mounting hole, the third mounting hole and the second mounting hole are coaxially arranged, and the third mounting hole, the second mounting hole and the first mounting hole are sequentially arranged; a third chute is formed at the lower side of the hole wall of the third mounting hole; the third chute extends downwards in a tilting manner from the third mounting hole to the second mounting hole, and the highest position of the third chute is lower than the lowest position of the inner side wall of the oil seal; the third inclined groove is used for collecting and discharging water and/or sediment overflowed from the storage groove.
12. The protective cover according to claim 11, wherein water and/or silt at the oil seal can be discharged through the storage tank, the third chute, the second chute and the first chute in this order, and the following conditions are satisfied: d1 > d2 > d3;
wherein d1 is the aperture of the first mounting hole, d2 is the aperture of the second mounting hole, and d3 is the aperture of the third mounting hole.
13. A protective assembly for an electric motor; characterized in that the protective assembly comprises a sealing ring and a protective cover according to any one of claims 4 to 12; the protective cover is arranged on the end cover, the protective cover and the coupler are positioned on the same side of the end cover, and the shaft connecting end is arranged in the first mounting hole in a penetrating manner; the sealing ring is sleeved on the output shaft and is in interference fit with the output shaft; the sealing ring is arranged in the second mounting hole, and a V-shaped structure is formed on the outer periphery side of the sealing ring; the V-shaped structure is in contact with the hole wall of the second mounting hole.
14. An electric motor comprising an end cap, an output shaft, a coupling, and the protective assembly of claim 13; the end cover is provided with an end cover hole, and the output shaft is arranged in the end cover hole in a penetrating way; the shaft coupling is provided with a shaft connecting end which is connected with the output shaft; the protective cover is arranged on the end cover, the shaft connecting end is arranged in the first mounting hole, and the sealing ring is arranged between the second mounting hole and the output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311519911.0A CN117559699A (en) | 2023-11-14 | 2023-11-14 | Protective cover, protective assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311519911.0A CN117559699A (en) | 2023-11-14 | 2023-11-14 | Protective cover, protective assembly and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117559699A true CN117559699A (en) | 2024-02-13 |
Family
ID=89814129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311519911.0A Pending CN117559699A (en) | 2023-11-14 | 2023-11-14 | Protective cover, protective assembly and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117559699A (en) |
-
2023
- 2023-11-14 CN CN202311519911.0A patent/CN117559699A/en active Pending
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