KR20150036863A - Bearing cover for motor - Google Patents

Bearing cover for motor Download PDF

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Publication number
KR20150036863A
KR20150036863A KR20130115819A KR20130115819A KR20150036863A KR 20150036863 A KR20150036863 A KR 20150036863A KR 20130115819 A KR20130115819 A KR 20130115819A KR 20130115819 A KR20130115819 A KR 20130115819A KR 20150036863 A KR20150036863 A KR 20150036863A
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KR
South Korea
Prior art keywords
bearing cover
bearing
weight
cover
rotary shaft
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Application number
KR20130115819A
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Korean (ko)
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KR102019515B1 (en
Inventor
최재영
Original Assignee
현대자동차주식회사
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Priority to KR1020130115819A priority Critical patent/KR102019515B1/en
Publication of KR20150036863A publication Critical patent/KR20150036863A/en
Application granted granted Critical
Publication of KR102019515B1 publication Critical patent/KR102019515B1/en

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    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor

Abstract

The present invention relates to a bearing cover for a motor of an eco-friendly vehicle. The main purpose is to provide an improved bearing cover for a motor to prevent the movement of the bearing interposed between a housing and the rotation shaft of the driving motor and to improve assembly. For achieving the purpose, the bearing cover includes a large part and a small part. The large part and the small part are divided by weight according to a circumference position. The position of a combination hole is changed according to the circumference position. A center hole is inserted into the rotation shaft of the motor. When it is fixed onto the rotation shaft of the motor, it is rotated by an eccentric force generated due to the position difference of the combination hole and the weight difference on the rotation shaft and can move to the predetermined position of each combination hole.

Description

Technical Field [0001] The present invention relates to a bearing cover for a drive motor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bearing cover for a driving motor of an eco-friendly automobile, and more particularly, to a bearing cover assembled to prevent a bearing between a rotating shaft of a driving motor and a housing.

Today, the development of environmentally friendly vehicles that use electric motors as the driving source of vehicles is being actively developed.

Typical examples of environmentally friendly vehicles include a hybrid electric vehicle (HEV) driven by an engine and a driving motor, a fuel cell vehicle (FCEV) that drives a driving motor by electric power generated by the fuel cell, Electric Vehicle), and a pure electric vehicle (EV) that drives a driving motor with electric power charged in the battery.

In such an eco-friendly automobile, since the drive motor is required to transmit the output to the drive wheel of the vehicle through the transmission, the rotation axis (rotor axis) for generating the torque output is connected to the transmission for power transmission.

For example, in a powertrain configuration of a hybrid vehicle, the hybrid vehicle has a layout in which the engine, the drive motor, and the transmission are arranged so as to be able to transmit power in a line, and an engine clutch is interposed between the engine and the drive motor, .

Such a driving motor is assembled into a housing, for example, inside a transmission housing, and at this time, the rotary shaft passes through the front cover of the housing and is assembled to be connected to the outside.

In addition, a bearing is interposed between the rotation shaft of the driving motor and the front cover of the housing. At this time, the inner ring of the bearing is fixed to the outer circumferential surface of the rotary shaft by tight fitting, and the outer ring is loose in the center hole of the front cover fitting.

However, in the above-described bearing assembly structure, a bearing creep (flow in the rotational direction) in which the bearing outer ring moves in the center hole of the front cover may occur due to the fluctuation of the bearing ball load, To generate noise.

In addition, axial flow may occur at the bearing outer ring at the time of turning of the vehicle in the left and right direction, which also causes a problem of noise and durability.

Therefore, in order to solve such a problem, a structure for fixing the bearing to prevent the flow is applied. Although various methods are applied as the bearing fixing structure, the most effective and widely used method is a fixing method using a bearing cover.

1 is an exploded perspective view showing a rotor 11 and a bearing 13 including a rotating shaft 12, a bearing cover 20 and a front cover 30 of a housing in the drive motor 10, A bearing 13 is assembled between the rotary shaft 12 of the drive motor 10 and the front cover 30 and a bearing cover 20 for fixing the bearing 13 is mounted on the bearing 13 And is bolted to the front cover 30 on the front side from the rear side.

However, when the above-described bearing cover 20 is applied, there is a problem that assembling performance of the drive motor 10, the bearing 13, and the front cover 30 is lowered. In the future, It is necessary to improve the assemblability of the bearing cover to improve the productivity.

FIG. 2 is a view for explaining a problem of the related art, in which the bearing cover 20 and the front cover 30 of the housing are assembled in a state where the bearing 13 is installed on the rotary shaft 12 of the drive motor 10 The bearing cover 20 is installed mainly for the purpose of preventing the flow of the outer ring of the bearing 13 (in particular, the axial flow) because the inner ring of the bearing 13 is press-fitted into the rotary shaft 12 of the drive motor. do.

One of the methods for assembling the bearing cover for a drive motor is to assemble the bearing cover 20 to the front cover 30 by fastening the bearing 13 to the front cover 30 and then assembling the bearing cover 20 to the front cover 30, And the rotary shaft 12 of the bearing 10 is press-fitted into the bearing inner ring.

However, when this method is applied, there is a problem that the bearings may be damaged because the rotary shaft 12 of the heavy driving motor 10 is press-fitted into the inner ring of the bearing 13 fixed to the front cover 30 have.

Alternatively, the bearing cover 20 may be first fitted on the rotary shaft 12 of the drive motor 10, and then the bearing 13 may be assembled to the rotary shaft 12 in front of the bearing cover 20 A method of fastening the bearing cover 20 on the rear side of the bearing and the front cover 30 on the front side with bolts is applied after the outer ring of the bearing is inserted into the center hole 31 of the front cover 30 .

However, according to this method, as shown in FIG. 2 (b), the bearing cover 20 positioned inside the front cover 30 is hidden by the front cover 30, so that the bolt can be tightened It is not easy to align the fastening holes 22 of the bearing cover 20 and the fastening holes 32 of the front cover 30 (aligning the holes).

For this reason, it is difficult to insert and fasten the bolts into the fastening holes 22 and 32 on both sides, and the fastening holes on both sides are matched in such a manner that the bearing cover 20 is rotated little by rotating the rotary shaft 12 of the driving motor However, it is not easy to match the fastening holes on both sides simply by rotating the rotary shaft, which has a problem that the assemblability is greatly reduced.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a driving motor, And a bearing cover for a motor.

In order to achieve the above-mentioned object, the present invention provides a bearing assembly for preventing the flow of a bearing interposed between a rotary shaft of a drive motor and a front cover of a housing, comprising: a center hole through which the rotary shaft passes; A bearing cover for a drive motor having a plurality of fastening holes arranged along a periphery of a center hole for fastening a bolt, the bearing cover having a shape in which a relatively large portion and a small portion can be distinguished Or the position of the fastening hole is changed according to the position in the circumferential direction. When the rotation shaft of the motor is mounted on the rotation axis so as to be inserted into the center hole, due to the difference in weight on the rotation axis or the position difference of the fastening holes The position of each fastening hole can be moved to the predetermined position while being rotated by the generated eccentric force Provides a bearing cover that assemblability is improved, characterized in that a.

Accordingly, according to the bearing cover for a drive motor of the present invention, since the position of each fastening hole can be moved to a predetermined position while being rotated by the eccentric force generated due to the difference in weight or the position of the fastening hole on the rotary shaft, The engagement between the fastening hole of the front cover and the fastening hole of the bearing cover can be easily performed, thereby contributing to an improvement in assembling performance.

1 is an exploded perspective view showing a rotor and a bearing including a rotating shaft of a driving motor, a bearing cover, and a front cover of the housing.
FIG. 2 is a view for explaining a problem of the conventional technique, and explains a problem of assembling when applying a bearing cover to prevent bearing flow.
3 is a perspective view illustrating a bearing cover according to an embodiment of the present invention.
FIG. 4 is a front view and a cross-sectional view showing a bearing cover according to an embodiment of the present invention, in which the diameter of a specific tab is larger than that of other tabs, and FIG. Sectional view of the formed embodiment (b).
Fig. 5 is a view for explaining the action due to gravity eccentricity.
6 is a view showing another embodiment of the present invention.
7 is a view showing still another embodiment of the present invention.
FIG. 8 is a view showing a tab portion shape for improving the assemblability in the embodiment of the present invention, in which a taper shape is applied to the tab portion. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be easily understood by those skilled in the art.

3 is a perspective view illustrating a bearing cover according to an embodiment of the present invention. As shown in FIG. 3, the bearing cover 20 includes a center hole 21, And has a plurality of fastening holes 22 formed therein.

Here, the center hole 21 is a portion of the rotor of the drive motor, more specifically, a portion to be inserted to allow the rotation shaft of the rotor to pass therethrough, and the fastening hole 22 is a portion for fastening the bearing cover 20 to the front cover of the housing with bolts It is used for the purpose.

In the assembly process, the rotation shaft of the drive motor is fitted in the center hole 21 to assemble the bearing cover 20 on the rotation shaft, and then the bearing is mounted on the front rotation shaft portion Lt; / RTI >

The bearing on the rotating shaft is assembled to the front cover so that the outer ring is fitted to the inner circumferential surface of the center hole of the front cover of the housing and then the bolts are fastened in the state where the front cover and the fastening hole 22 of the bearing cover 20 are aligned with each other .

The common bearing cover 20 may be formed in a plate shape with a plurality of through holes 22 penetrating therethrough or a plurality of through holes 22 penetrating through the portions 22a, 22b, 22c protruding from the plate surface at the respective engaging positions. Are used.

3 is a bearing cover 20 in which a fastening hole 22 is formed in protruding portions 22a, 22b and 22c. In the following description, the protruding portion 22 in which the fastening hole 22 is formed 22a, 22b, and 22c will be referred to as a tab portion.

3 shows an embodiment having three tab portions 22a, 22b, and 22c. The number and specific shapes of the tab portions can be variously changed according to an applied vehicle type, a motor specification, an assembly structure thereof, and the like. It is not limited to having three tab portions.

The bearing cover 20 of the embodiment has a main characteristic in that the predetermined portion is made heavier than the other portions. One of the bearing covers 20 is made to have a heavy weight eccentricity relative to the other, and when fitted, So that the heavy part can be moved to the lower position.

At this time, the bearing cover, which is fitted on the rotary shaft through the operation of rotating the rotary shaft of the drive motor, can be rotated so that the heavy portion is moved downward.

The weight eccentricity means that the weight is partially divided into a relatively large portion and a small portion by partially varying the weight depending on the circumferential position of the bearing cover, So that the eccentric force due to the weight difference can be generated and the bearing cover is rotated so that the heavy portion can be positioned downward on the rotary shaft.

Therefore, if the bearing cover is put on the rotary shaft of the driving motor for assembling (that is, when the bearing cover is assembled so that the rotary shaft is fitted in the center hole), the relatively heavy portion comes downward, The fastening hole position can be adjusted to the predetermined assembling position.

That is, after the bearing cover is fitted on the rotary shaft, the bearing cover is rotated about the rotation axis so that the heavy portion naturally descends due to the eccentricity of weight, so that the front cover can be naturally aligned between the fastening holes of the front cover and the bearing cover This allows the heavy part of the bearing cover with weight eccentricity to fall down naturally through the operation of turning the rotary shaft as necessary.

In this case, since the fastening holes of the bearing cover are located at predetermined positions, it is easy to align the fastening holes with the corresponding fastening holes of the front cover, so that the fastening of the bolts on both sides becomes easier.

As an example of the shape for achieving weight eccentricity in the embodiment, it is possible to apply different sizes of the tab portions 22a, 22b and 22c, and it is possible to make the tab portions different in diameter or thickness.

In other words, in the embodiment of FIG. 3, if the tab portion to be positioned below is defined as the tab portion 22a, the diameter or thickness of the tab portion 22a may be different from that of the other tab portion 22b 22c, 22c, 22c, 22c, 22c, and 22c, respectively, so that the weight eccentricity and the resulting eccentric force are generated.

3 shows an embodiment in which the diameter of the tab portion 22a in which the fastening hole 22 to be positioned below is formed is increased.

FIG. 4 is a front view and a cross-sectional view of a bearing cover according to an embodiment of the present invention, wherein (a) is a front view of an embodiment in which the diameter of a specific tab portion 22a is larger than that of other tab portions 22b, 22c b is a sectional view of the embodiment in which the thickness d of the specific tab portion 22a is thicker than the other tab portions 22b and 22c.

As shown in the figure, the portion of the bearing cover having a large size (diameter or thickness) of the tab portion is relatively heavy compared to the other portions. Therefore, in a state in which the bearing cover is laid over the rotating shaft When the bearing cover is made rotatable, the positions of the tab portions and the fastening holes can be arranged at predetermined positions with the heavy portion downward, and the hole alignment for fastening the front cover and the bolt can be easily performed.

Fig. 5 is a view for explaining the action due to gravity eccentricity. The weight eccentricity formed by forming the tab portion 22a having a relatively large size as compared with the other tab portions 22b, 22c is caused by the difference in self weight among the tab portions .

Further, when the bearing cover 20 is assembled on the rotary shaft 12 of the driving motor, the rotation (rotation of the heavy part downward) of the bearing cover 20 occurs due to the eccentric force due to the weight eccentricity Due to the eccentric force acting on them).

5, the weight difference between the tab portions 22a, 22b, 22c when the bearing cover 20 is stretched over the rotation axis 12 of the drive motor is the difference in weight between the tab portions 22a, 22b, And the rotation of the bearing cover with the heavy side downward due to the generation of the eccentric force can be performed.

Therefore, when the bearing cover 20 according to the present invention is used, when a condition that the bearing cover that spans on the rotary shaft can be rotated through the operation of rotating the rotary shaft 12 during assembly is made, As the moment (rotation torque) acts on the bearing cover as a whole, the rotation of the bearing cover (the heavy side is rotated downward) can be performed, and eventually the respective fastening holes 22 of the bearing cover can be moved to the predetermined position .

At this time, the fastening hole 22 of the tab portion 22a having a relatively large weight and the fastening hole of the tab portion having the largest moment due to the weight can be always positioned below.

3 to 5, in order to allow an eccentric force to be generated so that the tab portion 22a having a large size (large diameter or a large thickness) in the bearing cover 20 descends downward, The moment mr1 acting due to the weight of the large-sized tab portion 22a around the rotation axis can be made larger than the sum of the moments mr2 and mr3 due to the weight of the remaining two tab portions 22b and 22c mr1> mr2 + mr3) The size (diameter or thickness) and weight (weight due to size) of the tab should be set.

6 shows another embodiment of the present invention in which the weight eccentricity of the bearing cover can be realized by locally varying the size or thickness of the bearing cover.

In other words, the weight is made relatively heavier and the size of the remaining portion except for the tab portion is made larger or the thickness is made thicker in the portion where the fastening hole to be positioned below is located, compared with the portion where the other fastening hole is located.

More specifically, as shown in FIG. 6 (a), a portion protruding inwardly of the center hole 21 from the position of the other tab portion 22b, 22c at the position of the specific tab portion 22a in which the fastening hole 22 is formed is It is possible to make it larger so that this portion is heavier than the other portions.

At this time, a portion projecting to a larger area toward the inside of the center hole 21 is formed in the fastening hole portion to be positioned downward, and the dimension of 'L1> L2 and L1> L3' Condition.

It is also possible to form a shape protruding in the radial direction at the outer circumferential portion of the bearing cover 20 only at the position of the specific tab portion 22a where the fastening hole is formed as shown in Fig. 6 (b) It can be a part where the part gets heavier.

7, in consideration of the fact that the weight of the tab portions 22a, 22b, 22c formed with the fastening holes 22 occupies a large portion of the weight of the bearing cover 20 as shown in Fig. 7, The eccentric force for rotation can be generated in the bearing cover.

That is, when the radial distance from the center of the center hole 21 of the bearing cover 20 to each of the tab portions 22a, 22b, and 22c is a radial distance, the radial distance r1 of the specific tab portion 22a is made different, The tab portion 22a having the fastening hole for positioning the bearing cover downward is formed at a position having a larger radial distance than the other tab portions 22b and 22c when the bearing cover is put on the rotating shaft of the driving motor.

The tab portions 22a, 22b and 22c are formed at positions satisfying the conditions of 'r1> r2 and r1> r3' in FIG. 7. In this case, the moment due to the weight of the tab portion 22a located at r1 is relatively An eccentric force is generated to rotate the bearing cover 20 so that the tab portion 22a at the distance r1 and the fastening hole 22 thereof can always be positioned on the rotation axis of the drive motor.

At this time, the eccentric force acting on the bearing cover, that is, the moment (rotation torque) action due to the difference in the position of the tab portion, is not different from that described in FIG.

3 to 6, the tabs arranged along the circumferential direction are arranged at regular intervals (120 DEG). However, two tabs among a total of three tabs, for example, three tabs, are positioned close to each other It is possible that the portion of the bearing cover with two tab portions on the rotation axis of the drive motor due to the weight of the tab portion can be positioned below.

In this case, the positions of the two fastening holes positioned by moving the two tab portions which are assembled can be matched to the two lower fastening holes formed at the same interval of the front cover, so that the fastening holes can be positioned more easily , The bolt fastening operation can be further facilitated.

Further, in the case of a bearing cover formed with only a fastening hole without a protruding tab portion, the one side portion is heavier than the other side portion so that the gap between the fastening holes in the one side portion is smaller than that in the other side portion It is possible to set the radial distance of the fastening hole of one side portion to be smaller than the radial distance of the fastening hole of the other side portion in order to generate the eccentric force.

For example, in the case of forming five fastening holes in total, two fastening holes are formed by positioning the three fastening holes with a small interval in one semicircle section of the bearing cover and relatively increasing the gap in the other half-circle section .

In this case, since the bearing cover on the rotation axis of the driving motor has a small weight in the semicircle section where many fastening holes are formed, the semicircle section in which the fastening holes are small can be assembled in a state where the semicircle section is located downward.

FIG. 8 is a view showing a tab portion shape for improving the assemblability in the embodiment. As shown in FIG. 8, a taper shape can be applied to the tab portion 22a on the heavy side to be positioned downward on the rotation axis of the drive motor.

There is a dimensional difference between the inner diameter of the bearing cover 20 (inner diameter of the center hole) and the outer diameter of the rotary shaft 12 before the bearing cover 20 is fitted on the rotary shaft 12 of the drive motor , The bearing cover 20 is struck down on the rotary shaft 12 (see Fig. 5).

At this time, the lower tab portion 22a is formed to have a tapered shape, and the groove portion 32a in which the tab portion 22a is received in the lower fastening hole 32 of the front cover 30 is also tapered And is formed to have an applied shape.

In this case, as shown in Fig. 8, even when the bearing cover 20 slightly hits downward, when the bolt is inserted and fastened to the fastening holes 22 and 32, the lower tab portion 22a and the inclined surface The bearing cover moves upward while being moved by the contact and movement of the upper cover, so that not only the lower tab but also the other tab can be smoothly inserted into the groove of the front cover.

When the tapered shape is applied to the tab portion as described above, the assemblability can be further improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Modified forms are also included within the scope of the present invention.

10: drive motor 11: loader
12: rotating shaft 20: bearing cover
21: center hole 22: fastening hole
22a, 22b, 22c: tab portion 30: front cover
31: center hole 32: fastening hole
32a:

Claims (10)

A center hole for allowing the rotation shaft to pass therethrough; and a second cover disposed around the center hole for bolt-tightening the front cover, In a bearing cover for a drive motor having a plurality of fastening holes,
A shape in which a relatively large portion and a small portion can be distinguished by a weight difference depending on a circumferential position, or a shape in which a position of a fastening hole is made different according to a circumferential position,
When the rotary shaft of the motor is mounted on the rotary shaft so as to be fitted on the rotary shaft, the rotary shaft is rotated by the eccentric force generated due to the difference in weight or the position of the rotary shaft, and the position of each rotary shaft is moved to the predetermined position Wherein the bearing cover is formed of a metal material.
The method according to claim 1,
Wherein the diameter or the thickness of the protruded tabs is different from the diameter or the thickness of the tabs in a portion where relatively large weight is required. Improved bearing cover.
The method according to claim 1,
Wherein the weight of the bearing cover is larger than that of the other portions, and the thickness of the remaining portion is increased or the thickness of the bearing cover is increased.
The method of claim 3,
Wherein a size or thickness of a portion protruding inward from the center hole in a portion where a relatively large weight is required is formed to be larger than that in other portions, thereby increasing the assemblability.
The method of claim 3,
Characterized in that a radially projecting shape is formed in the outer peripheral portion at a portion where a relatively large weight is required to be heavy due to the protruding shape.
The method according to claim 1,
Wherein a radial distance from the center hole to the fastening hole is different for each fastening hole and a portion where a fastening hole with a relatively small radial distance is formed by the eccentric force on the rotating shaft is made to come down Bearing cover with improved assembly.
The method according to claim 1,
Wherein a tab portion having a plurality of fastening holes and having a protruding shape is made to have a different radial distance so that a tab portion having a larger radial distance due to an eccentric force on the rotating shaft and a fastening hole formed thereon come down Bearing cover with improved performance.
The method according to claim 1,
Wherein a gap between the fastening holes arranged in the circumferential direction is different from that in the circumferential direction so that the gap between the fastening holes is increased at a portion where a relatively large weight is required, Bearing cover.
The method according to claim 1,
A plurality of tabs arranged along the circumferential direction and having a protruding shape with the respective fastening holes formed therein are formed at different intervals in the circumferential direction, And the gap is made to be larger than the portion where the interval is made larger by the weight of the tab portion.
The method according to claim 1,
Wherein the tab portion having a protruding shape with the fastening holes formed therein is formed to have a tapered shape and the groove portion in which the tapered tab portion is received in the fastening hole of the front cover is formed to have a tapered shape Bearing cover with improved assembly.




KR1020130115819A 2013-09-30 2013-09-30 Bearing cover for motor KR102019515B1 (en)

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KR102019515B1 KR102019515B1 (en) 2019-09-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220036396A (en) 2020-09-14 2022-03-23 현대자동차주식회사 Structure for preventing electric corrosion and improving nvh of driving motor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10313548A (en) * 1997-05-08 1998-11-24 Shinko Electric Co Ltd Method for regulating axial gap of rotary shaft of rotary electric machine
JP2003189531A (en) * 2001-12-11 2003-07-04 Asmo Co Ltd Dynamo-electric machine and its manufacturing method
JP2010249214A (en) * 2009-04-15 2010-11-04 Toyota Motor Corp Continuously variable transmission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10313548A (en) * 1997-05-08 1998-11-24 Shinko Electric Co Ltd Method for regulating axial gap of rotary shaft of rotary electric machine
JP2003189531A (en) * 2001-12-11 2003-07-04 Asmo Co Ltd Dynamo-electric machine and its manufacturing method
JP2010249214A (en) * 2009-04-15 2010-11-04 Toyota Motor Corp Continuously variable transmission

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