KR20160045022A - A motor end shield and a motor - Google Patents

A motor end shield and a motor Download PDF

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Publication number
KR20160045022A
KR20160045022A KR1020150143868A KR20150143868A KR20160045022A KR 20160045022 A KR20160045022 A KR 20160045022A KR 1020150143868 A KR1020150143868 A KR 1020150143868A KR 20150143868 A KR20150143868 A KR 20150143868A KR 20160045022 A KR20160045022 A KR 20160045022A
Authority
KR
South Korea
Prior art keywords
motor
end cover
rear end
airflow
outer peripheral
Prior art date
Application number
KR1020150143868A
Other languages
Korean (ko)
Inventor
타오 순
하이시앙 왕
토마스 헬밍
젠시 시아오
젠메이 키안
케징 탄
미첼 스트럽
Original Assignee
보쉬 오토모티브 프로덕츠 (창샤) 캄파니, 리미티드
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 보쉬 오토모티브 프로덕츠 (창샤) 캄파니, 리미티드 filed Critical 보쉬 오토모티브 프로덕츠 (창샤) 캄파니, 리미티드
Publication of KR20160045022A publication Critical patent/KR20160045022A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

The present invention relates to a cover of a motor′s end part and a motor. An air inlet is arranged in a circumference direction in the cover of the end part. An air current guide member is installed in the air inlet. The air current guide member directly guides an air current passing through the air inlet to the commutator of the motor. Because the air current is directly guided to the copper surface of the commutator, by a guide wall having the cover of the end part of the motor, a vent, and a spatially curved surface, higher cooling efficiency can be achieved. Also, because the temperature of copper and the temperature of a brush can be effectively reduced, the useful life of the motor can be extended.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a motor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of design and manufacture of a motor, and more particularly, to a motor including a rear end cover of a motor and a rear end cover of such a motor.

Cars are powered mainly by gasoline engines. When gasoline burns inside the engine, it generates a large amount of heat. Therefore, the automobile has an engine cooling system so that the engine can operate at an optimum temperature.

Generally, the engine cooling system includes a water jacket, a radiator that communicates with the water jacket, and a fan that provides air to the radiator and is driven by the motor.

In the prior art, the rear end cover of the fan motor of the engine has a closed configuration. A motor with such a closed rear end cover will generate heat due to copper loss, core loss, mechanical wear and friction between the carbon brush and the rectifier during use. Therefore, the closed rear end cover of the motor has a great influence on the heat radiation inside the motor. As a result, the temperature inside the motor rises, which affects the life of the motor.

1 is a perspective view of a fan motor of another type of prior art engine. Reference numeral 1 denotes a rear end cover of the motor, 2 denotes a housing of the motor, and 3 denotes a vent hole opened on the rear end cover 1 of the motor. The airflow is blown to the motor via a plurality of ventilation holes (3) so that the heat generated by the windings inside the motor is dissipated. As can be seen from the actual application process, this vent hole 3 can not effectively improve the heat dissipation of the motor.

Referring to FIG. 1, when the motor is used horizontally, the rear end cover 1 of the motor flows water into the inside of the motor through a plurality of ventilation holes 3 to influence the operation of the motor, . In theory, when the motor is absolutely horizontal, there is no shape in which the water enters the motor no matter what type of ventilation hole it takes. However, in actual operation of the vehicle, the motor can not always assume an absolute level. In other words, the motor is inclined to some extent and its inclination is usually 5 degrees left or right. If only the air holes 3 formed by the method of removing the material shown in Fig. 1 are used, the water can easily flow into the motor through the plurality of vent holes 3.

It can be seen from the above that the above problems also exist in other motors other than the fan motor of the engine mentioned in this application,

The problem to be solved by the present invention is to provide a rear end cover of a motor which can overcome the drawbacks existing in the prior art.

The problem to be solved by the present invention is to provide a motor having such a rear end cover.

According to the first aspect of the present invention, in the rear end cover of the motor, the rear end cover is provided with a dressing hole arranged along the outer circumferential direction, and the air flow injected through the inlet hole is formed in the inlet hole An airflow guide member for directly guiding the airflow to the commutator of the motor is provided.

Preferably, the airflow guide member in the rear end cover is a guide wall having a spatial structure.

Preferably, in the rear end cover, the airflow guide member includes a plurality of guide walls distributed along the outer circumferential direction on the rear end cover, wherein the cross-sectional shape of the guide wall is arcuate and curved outward have.

Preferably, the guide wall of the rear end cover extends in an arcuate shape along the outer circumferential direction of the rear end cover, and the inside diameter thereof is slightly larger than the outside diameter of the commutator.

Preferably, in the rear end cover, the rear end cover includes an outer peripheral portion and a central portion, the outer peripheral portion and the central portion being spaced apart by the inlet hole, And a rib connecting the central portion with the central portion is formed, and the central portion protrudes from the outer peripheral portion along the axial direction.

Preferably, the projected height of the center portion in the rear end cover is equal to the height of the guide wall.

Preferably, in the rear end cover, the guide wall and the rib form a closed surface along the outer circumferential direction.

Preferably, the outer peripheral portion, the central portion, the rib, and the airflow guide member are integrally formed in the rear end cover.

According to another aspect of the present invention, there is provided a motor comprising any rear end cover as described in one aspect above.

Preferably, the motor further includes an exit hole, wherein the exit hole is provided in the housing of the motor or the front end cover of the motor.

According to the present invention, since the airflow can be guided directly to the copper surface of the commutator through the guide wall having the rear end cover, the vent hole and the spatially curved surface of the motor, the cooling efficiency can be further improved, And the brush temperature can be effectively lowered, so that the service life of the motor can be extended.

Hereinafter, the present invention will be described in more detail with reference to the drawings. The accompanying drawings are for the purpose of illustration and are not intended to limit the scope of the invention.
1 is a perspective view of a fan motor of a conventional engine.
2 is a perspective view of a motor showing a rear end cover of a motor according to an embodiment of the present invention.
3 is an internal structural view of the motor according to the embodiment of the present invention.
4 is another perspective view of the motor showing the rear end cover of the motor according to the embodiment of the present invention.

Hereinafter, specific details of the present invention will be described in detail with reference to the drawings.

2 is a perspective view of a motor according to a first embodiment of the present invention. 2, reference numeral 11 denotes a rear end cover of the motor, 11a denotes an outer peripheral portion of the rear end cover, 11b denotes a central portion of the rear end cover, 12 denotes a housing of the motor, 13 denotes a guide wall, 15 is a commutator mounted inside the motor, and 16 is a rib supporting the center portion 11b. It will be understood by one of ordinary skill that the output shaft (not shown) of the motor extends to the other end opposite to the rear end cover 11 (i.e., the front end cover). FIG. 2 shows other commonly known members of a motor. As a conventional engineer, it is possible to suitably select and mount the motor according to demand, so that a detailed description thereof will be omitted here. A dustproof mesh may further be provided on the lower portion of the rear end cover 11. [

The inlet hole 14 may be a porous structure obtained through press working. The inner edge of the press-processed portion is cut, and the outer edge is continuously connected to the rear end cover 11. This inlet hole 14 allows the outer peripheral portion 11a and the central portion 11b of the rear end cover 11 to be spaced apart. After completion of the press working, the guide wall 13 is formed so that the machined portion is bent outward (for example, in a circular arc shape). The airflow flowing through the inlet hole 14 is guided to the commutator 15 side by the guide wall 13. In the illustrated embodiment, the guide wall 13 extends in an arcuate shape along the outer circumferential direction of the rear end cover 11 (or the commutator 15), and its inner diameter is slightly larger than the outer diameter of the commutator 15. Whereby the airflow can be distributed on the average so as to be in the circumferential direction of the commutator 15. In addition, the guiding wall 13 may be provided to have other spatial shapes so that the airflow flowing through the inlet hole 14 can be directly guided to the commutator 15. [ Optionally, other types of airflow guide members other than wall-shaped may be used.

And a rib (16) composed of a portion not subjected to press working is provided between the adjacent inlet holes (14). The rib 16 and the rear end cover 11 of the motor are integrally formed and connected to the outer peripheral portion 11a and the central portion 11b of the rear end cover 11 to ensure the connection strength between them have. Referring to an example of the drawing, the center portion 11b is further protruded outward along the axial direction as compared with the outer peripheral portion 11a, so that the airflow smoothly flows into the motor to reach the commutator 15 . The height of the portion of the center portion 11b protruding outward is equal to the height of the guide wall 13 extending in the axial direction of the motor. As a result, the airflow can be guided more smoothly and the size in the axial direction of the motor becomes more compact.

In actual processing, first, the central portion 11b protruding from the rear end cover 11 is pressed, then the other materials are left out correspondingly to the width of the rib 16, . In the prior art, the ventilation of the DC motor is realized through some pores located in the rear end cover, which pores are formed in a simple way of removing the material, and could not direct airflow directly and efficiently to the copper surface of the commutator.

In order to form a perfect airflow passage, an outlet hole may be provided on the front end cover of the motor or on the side surface of the motor housing. When the outlet hole is formed in the front end cover, the airflow passes through the half-wave motor, and the cooling effect can be further clarified. The size and shape of the exit hole are not limited.

Fig. 3 shows an internal structure of the motor according to the first embodiment of the present invention. Since the housing of the motor is omitted in the drawing, the airflow guide passage and its operation principle can be observed more clearly. 3, the height of the guide wall 13 is equal to the height of the center portion 11b of the rear end cover 11, and the position in the outer circumferential direction of the guide wall 13 is equal to the height of the center of the commutator 15 Approach the outer surface. Further, the guide wall 13 can be bent and guided by the commutator 15 so as to cool the commutator 15 directly. A dotted line in the figure indicates the flow path and direction of the airflow. In an actual application, the airflow does not flow only on both sides of the commutator 15 but flows through the entire outer circumferential portion of the commutator 15 to advance the cooling function.

As can be more clearly seen from the drawing, the guide wall 13 forms a "wall" which is a spatial (3D) curved surface, and the diameter of the lower portion is slightly larger than the outer diameter of the commutator 15. The cross section of the "wall " is curved similarly to the circular arc shape, and has a function of guiding the airflow when the airflow flows into the motor from the inlet hole 14, Since the airflow moves along the surface or tangential direction of the "wall ", it flows into the motor and can reach the surface of the commutator 15 directly.

3, the structure of the outer peripheral portion 11a, the central portion 11b, the guide wall 13, the rib 16, and the like of the rear end cover 11 can be more clearly observed. Such a structure can be integrally formed by press working, which can improve the stability of the structure. Or in a selectable embodiment, may be a single piece mechanically coupled, which simplifies the design and manufacture of the structure.

4 shows another perspective view of the motor of the first embodiment according to the present invention. 4 shows a motor in a horizontal state. As shown, the guide wall 13 and the rib 16 form a closed surface in the outer circumferential direction. When the motor is in a horizontal state (i.e., the output shaft is along the axial direction), if the water flows along the surface of the rear end cover 11 of the motor, this water flows along the outside of the closing surface and does not flow into the motor . This structure performs waterproof function when the motor operates in the axial horizontal position.

Although the cooling fan motor of the engine has been described as described above, the present invention is not limited thereto. When the design requirements are met, the present invention can be applied to all motors.

The description of the preferred embodiments of the present invention with reference to the drawings is illustrative only and is not intended to limit the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

In the rear end cover of the motor,
Wherein the rear end cover is formed with a dressing hole arranged along the circumferential direction,
An air flow guide member is provided in the inlet hole,
Wherein the airflow guiding member is adapted to guide the airflow via the inlet hole directly to the commutator of the motor. The method according to claim 1,
Wherein the airflow guiding member is a guide wall having a spatial structure. The method according to claim 1,
Wherein the airflow guiding member includes a plurality of guide walls that are circularly curved and bent outwardly in a cross section distributed along the outer circumferential direction on the rear end cover. The method of claim 3,
Wherein the guide wall extends in an arc shape along an outer circumferential direction of the rear end cover, the inner diameter of which is slightly larger than the outer diameter of the commutator. The method according to claim 2 or 3,
Wherein the rear end cover includes an outer peripheral portion and a central portion,
Wherein the outer peripheral portion and the central portion are spaced apart by the inlet hole,
A rib is formed between the inlet holes to connect the outer peripheral portion and the central portion,
And the central portion protrudes from the outer peripheral portion along the axial direction. 6. The method of claim 5,
Wherein the protruding height of the center portion is the same as the height of the guide wall. 6. The method of claim 5,
Wherein the guide wall and the rib form a closed surface along an outer circumferential direction. 6. The method of claim 5,
Wherein the outer peripheral portion, the central portion, the rib, and the airflow guide member are integrally formed. A motor comprising the rear end cover of any one of claims 1 to 8. 10. The method of claim 9,
Wherein the motor further comprises an exit hole provided in a housing of the motor or a front cover of the motor.
KR1020150143868A 2014-10-16 2015-10-15 A motor end shield and a motor KR20160045022A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410546731.6A CN105576879A (en) 2014-10-16 2014-10-16 Motor rear end cap and motor
CN201410546731.6 2014-10-16

Publications (1)

Publication Number Publication Date
KR20160045022A true KR20160045022A (en) 2016-04-26

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KR1020150143868A KR20160045022A (en) 2014-10-16 2015-10-15 A motor end shield and a motor

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KR (1) KR20160045022A (en)
CN (1) CN105576879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109974257A (en) * 2019-04-22 2019-07-05 宁波奥克斯电气股份有限公司 A kind of motor cover, pedestal and air conditioner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108566020B (en) * 2018-04-27 2023-10-13 日兴（宁波）电机有限公司 Carbon brush chamber for automobile internal combustion engine alternating-current generator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109438A (en) * 1984-10-31 1986-05-27 Toshiba Corp Rotary electric machine for vehicle
JPH09215271A (en) * 1996-01-26 1997-08-15 Yaskawa Electric Corp Cooling device for adjustable speed motor
CN101110539A (en) * 2006-07-19 2008-01-23 天蝎星精密工业（香港）有限公司 Ventilated motor
DE102010012392A1 (en) * 2010-03-22 2011-09-22 Ebm-Papst Mulfingen Gmbh & Co. Kg fan
CN103326512B (en) * 2013-05-16 2015-04-15 西安交通大学 Centrifugal air compressor cooling structure driven by ultra-high-speed permanent magnet motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109974257A (en) * 2019-04-22 2019-07-05 宁波奥克斯电气股份有限公司 A kind of motor cover, pedestal and air conditioner

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