CN205622382U - Motor bearing preloading device and motor - Google Patents
Motor bearing preloading device and motor Download PDFInfo
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- CN205622382U CN205622382U CN201620094148.0U CN201620094148U CN205622382U CN 205622382 U CN205622382 U CN 205622382U CN 201620094148 U CN201620094148 U CN 201620094148U CN 205622382 U CN205622382 U CN 205622382U
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- end bearing
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Abstract
The utility model discloses a motor bearing preloading device, bearing and bearing room clearance fit, the device includes: be provided with the inside cap of a plurality of elastic element rooms, elastic element group, every elastic element wherein sets up indoorly at one the 1st elastic element, be provided with the outdoor bearing cap of a plurality of the 2nd elastic element, the 2nd elastic element group, every the 2nd elastic element wherein sets up indoorly at one the 2nd elastic element, elastic element group exerts first axial force to the outer lane of bearing, and the 2nd elastic element group exerts the second axial force to the outer lane of bearing, first axial force constitutes with the difference of second axial force the axial pretightning force of bearing, first axial force can produce with the second axial force and stop the frictional force of bearing inner race in the circumferencial direction motion. The utility model discloses in still disclose a motor. The utility model provides a technical scheme can reduce the wearing and tearing of bearing room to improve bearing life.
Description
Technical field
This utility model relates to machine field, particularly a kind of motor bearings pre-tightening apparatus and motor.
Background technology
In large-size machine, due to rotor axial length, the temperature rise of motor, the most widely used floating support structure compensates the thermal stretching of armature spindle, prevents bearing stuck.Wherein, multi-pole Low speed electric motor can use cylinder roller bearing to realize float support, and the two poles of the earth high-speed electric expreess locomotive is limited by bearing maximum speed allowable, selects deep groove ball bearing more.But using matched in clearance that bearing outer ring can be caused to produce circumferencial direction motion under Dynamic Loading between the outer ring of deep groove ball bearing and bearing chamber, relative motion can cause bearing chamber to wear and tear.The electric motor end cap of cast iron is low because of material hardness, and the wear out failure of its bearing chamber is the most universal.Bearing chamber abrasion rear motor vibration and noise increase, and stator and rotor can be caused time serious to touch mill motor failure.In addition deep groove ball bearing needs to apply axial pre tightening force, prevents the rolling element in bearing from producing slip when motor speed changes, and run out bearing raceway, shortens bearing life.
In order to reduce the abrasion of bearing chamber, some electric motor end cap uses bi-material at present, i.e. overall employing cast iron materials, bearing chamber uses steel material to increase the hardness of bearing chamber, bearing chamber uses interference fit to be embedded in electric motor end cap afterwards, but this structural manufacturing process is complicated, and thin-wall bearing room difficulty of processing is big, and cost is high.
Additionally, some motor considers to slot at bearing chamber, add O-shaped rubber ring, with increasing friction force, limit the relative motion between bearing outer ring and bearing chamber.But the distribution of force of the bearing outer ring of thin-walled can be affected due to bearing chamber fluting, thus shorten the service life of bearing.And the moment of friction of the vibration of heavy-duty motor and bearing is big, and the intensity of rubber ring is low easy to wear, and therefore the life-span of rubber ring is low.Additionally, rubber ring can be used only in the positioning end of motor support, when being used in the floating end of motor support, the frictional force of rubber can cause the axial pre tightening force of bearing unreliable.
Therefore, those skilled in the art are also being devoted to find other the solution reducing bearing chamber abrasion.
Utility model content
On the one hand in view of this, this utility model proposes a kind of motor bearings pre-tightening apparatus, on the other hand proposes a kind of motor, in order to reduce the abrasion of bearing chamber, and improves bearing service life.
A kind of motor bearings pre-tightening apparatus proposed in this utility model, described bearing and bearing chamber matched in clearance；Described device includes:
Inside cap, is provided with M the first flexible member room；M is more than or equal to 1；
First flexible member group, it includes M the first flexible member, and first flexible member that each first flexible member is arranged on described inside cap is indoor；
Outer bearing cover, is provided with N number of second flexible member room；N is more than or equal to 1；M is not equal to N equal to N or M；
Second flexible member group, it includes that N number of second flexible member, each second flexible member are arranged on second flexible member indoor of described outer bearing cover；
Described inside cap coordinates with described bearing clearance, and described first flexible member group applies the first axial force to the outer ring of described bearing；Described outer bearing cover coordinates with described bearing clearance, and described second flexible member group applies a second axial power to the outer ring of described bearing；The difference of described first axial force and described second axial force constitutes the axial pre tightening force of described bearing；Described first axial force and described second axial force can produce the frictional force stoping described bearing outer ring to move at circumferencial direction.
In one embodiment, described first axial force is more than described second axial force.
In one embodiment, described M the first flexible member room is distributed uniformly and circumferentially on described inside cap；Described N number of second flexible member room is distributed uniformly and circumferentially on described outer bearing cover.
A kind of motor proposed in this utility model, including: drive end bearing and non-driven-end bearing, described drive end bearing and its bearing chamber matched in clearance, described non-driven-end bearing and its bearing chamber matched in clearance；Additionally, described motor also includes:
Any of the above-described bearing pre-tightening device implementing form that corresponding drive end bearing is arranged；With
Any of the above-described bearing pre-tightening device implementing form that corresponding non-driven-end bearing is arranged.
In one embodiment, in the bearing pre-tightening device that described corresponding drive end bearing is arranged, the axial fit clearance of the outer ring of inside cap and described drive end bearing is between 0.1～0.5mm.
Another motor proposed in this utility model, including: drive end bearing and non-driven-end bearing, described drive end bearing and its bearing chamber matched in clearance, described non-driven-end bearing and its bearing chamber matched in clearance；Additionally, described motor also includes:
Any of the above-described bearing pre-tightening device implementing form that corresponding non-driven-end bearing is arranged；With
The drive end bearing pre-tightening apparatus that corresponding drive end bearing is arranged；Described drive end bearing pre-tightening apparatus includes:
Inside cap, it contacts cooperation with described drive end bearing；
Outer bearing cover, itself and described drive end bearing matched in clearance, and it is provided with N number of flexible member room；N is more than or equal to 1；
Flexible member group, it includes that N number of flexible member, each flexible member are arranged on flexible member indoor of described outer bearing cover；Described flexible member group applies an axial force to the outer ring of described drive end bearing；Described axial force is transferred on described inside cap by the outer ring of described drive end bearing, and described axial force and described inside cap can produce the frictional force stoping the outer ring of described drive end bearing to be moved at circumferencial direction.
Can be seen that from such scheme, owing in this utility model, inside cap and outer bearing cover all coordinate with bearing clearance, and the flexible member group to bearing applying axial force it is respectively provided with in inside cap side and outer bearing cover side, the difference composition making the axial force of two flexible member groups prevents the rolling element in bearing from producing the axial pre tightening force slided when motor speed changes, the axial force of two flexible member groups can produce the frictional force stoping described bearing outer ring to move at circumferencial direction simultaneously, thus can reduce the abrasion even avoiding bearing to bearing chamber；And owing to bearing pre-tightened can be maintained by this cooperation mechanism, therefore improve the service life of bearing, and then the most therefore the life-span of whole motor is increased；And the technical scheme in this utility model remains in that the matched in clearance of bearing and bearing chamber, and motor assembling is easily implemented, and simplifies assembling process.
Accompanying drawing explanation
Preferred embodiment of the present utility model will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that above and other feature and advantage of the present utility model, in accompanying drawing:
Fig. 1 is the structural representation of a kind of motor bearings pre-tightening apparatus in this utility model embodiment.
Fig. 2 is the structural representation of a kind of inside cap in motor bearings pre-tightening apparatus shown in Fig. 1；Fig. 3 is the structural representation of a kind of outer bearing cover in motor bearings pre-tightening apparatus shown in Fig. 1.
Wherein, reference is as follows:
Detailed description of the invention
In this utility model embodiment, in order to reduce the abrasion of bearing chamber, it is considered to start with from the motion preventing bearing outer ring from producing circumferencial direction.nullIn order to meet the axial pre tightening force needed for bearing，It is typically employed in inside cap side or outer bearing cover side and bearing is applied axial pre tightening force，But this axial pre tightening force can only meet and prevents the rolling element in bearing from producing the requirement slided when motor speed changes，Strength is smaller，The frictional force stoping bearing outer ring to produce circumferencial direction motion cannot be provided，Therefore in this utility model embodiment，Consider in inside cap side and outer bearing cover side, bearing outer ring to be applied axial force in opposite direction simultaneously，I.e. apply axial force in the both sides of bearing outer ring simultaneously，And the axial force of both sides varies in size，I.e. there is an axial force difference，This axial force difference is the bearing pre-fastening needed for bearing，The axial force being applied simultaneously to bearing outer ring both sides can use bigger pressure to increase frictional force，Guarantee that motor operation course middle (center) bearing outer ring will not produce rotation，Thus reduce and even avoid the abrasion between bearing outer ring and bearing chamber.
When implementing, the axial force that bearing outer ring both sides apply by arranging the first flexible member group of interior outer bearing cover and can be arranged on the second flexible member group offer of outer bearing cover.Wherein, the first flexible member group and the flexible member quantity of the second flexible member group, rigidity, length etc. can be selected according to actual needs, say, that the flexible member group of both sides is different.
For making the purpose of this utility model, technical scheme and advantage clearer, by the following examples this utility model is further described.
Fig. 1 is the structural representation of a kind of motor bearings pre-tightening apparatus in this utility model embodiment.Fig. 2 is the structural representation of a kind of inside cap in motor bearings pre-tightening apparatus shown in Fig. 1；Fig. 3 is the structural representation of a kind of outer bearing cover in motor bearings pre-tightening apparatus shown in Fig. 1.
As it is shown in figure 1, the bearing 1 in the present embodiment can use deep groove ball bearing, inner ring 11 and rotor axis of electric 2 interference fit of bearing 1, outer ring 12 and bearing chamber 3 matched in clearance of bearing 1.This bearing pre-tightening device comprises the steps that inside cap the 4, first flexible member group 5, outer bearing cover 6 and the second flexible member group 7.
Shown in Fig. 1 and Fig. 2, inside cap 4 is provided with M the first flexible member room 41；M is more than or equal to 1.In the present embodiment in case of M=8.Wherein, M the first flexible member room 41 can be distributed uniformly and circumferentially on inside cap 4, or the rule that can also take other form or be randomly distributed, and is not limited.
First flexible member group 5 includes M the first flexible member, and each first flexible member is arranged in a first flexible member room 41 of inside cap 4.
Shown in Fig. 1 and Fig. 3, outer bearing cover 6 is provided with N number of second flexible member room 61；N is more than or equal to 1.Wherein, M can be equal to N, it is also possible to is not equal to N.In the present embodiment in case of M=N=8.Wherein, N number of second flexible member room 61 can be distributed uniformly and circumferentially on outer bearing cover 6, or the rule that can also take other form or be randomly distributed.
Second flexible member group 7 includes that N number of second flexible member, each second flexible member are arranged on second flexible member indoor of outer bearing cover 6.
Wherein, inside cap 4 and bearing 1 matched in clearance, and the first flexible member group 5 applies the first axial force to the outer ring 12 of bearing 1；Outer bearing cover 6 also with bearing 1 matched in clearance, and the second flexible member group 7 applies a second axial power to the outer ring 12 of bearing 1；The difference of described first axial force and described second axial force constitutes the axial pre tightening force of bearing 1, and the rolling element in preventing bearing produces slip when motor speed changes；Meanwhile, described first axial force and described second axial force can produce the frictional force stoping the outer ring 12 of bearing 1 to be moved at circumferencial direction.
In this utility model embodiment, first flexible member group and the second flexible member group in the parameters such as quantity, rigidity, length can part identical, can also be entirely different, both ensureing, apply different axial forces to bearing 1, form the difference of the axial force constituting axial pre tightening force.Additionally, the concrete form of the first flexible member can select according to actual needs, such as, can be spring, shell fragment etc..Wherein, spring can be cylindrical spring, disc spring, wave spring etc..Equally, the concrete form of the second flexible member can also select according to actual needs, such as, can be spring, shell fragment etc..Wherein, spring can be cylindrical spring, disc spring, wave spring etc..
In an example of the present utility model, so that described first axial force will produce the power of a stretching armature spindle more than described second axial force, the so difference of the two axial force, such that it is able to make armature spindle the most flexible, and then making the amount of deflection of motor reduce, dynamic balancing ability improves.
In this utility model embodiment, the side of the inner ring 11 of bearing 1 carries out spacing by the step of armature spindle 2, and opposite side then by a locating part, as got rid of alicyclic ring 8 etc., carries out spacing.It addition, inside cap 4, outer bearing cover 6 can be attached fixing by connectors such as bolts with bearing chamber 3.
Also providing for a kind of motor (not shown) in this utility model embodiment, this motor includes: drive end bearing and non-driven-end bearing, described drive end bearing and its bearing chamber matched in clearance, described non-driven-end bearing and its bearing chamber matched in clearance.
In an embodiment of the present utility model, described motor also includes: the above-mentioned bearing pre-tightening device that corresponding drive end bearing is arranged；The above-mentioned bearing pre-tightening device arranged with corresponding non-driven-end bearing, i.e. corresponding drive end bearing and non-driven-end bearing are symmetrical arranged above-mentioned bearing pre-tightening device.Now, in an example of the present utility model, in the bearing pre-tightening device that corresponding drive end bearing is arranged, the axial fit clearance of the outer ring of inside cap and described drive end bearing can be between 0.1～0.5mm.
In further embodiment of the present utility model, described motor also includes: the drive end bearing pre-tightening apparatus that the above-mentioned bearing pre-tightening device that corresponding non-driven-end bearing is arranged is arranged with corresponding drive end bearing；Described drive end bearing pre-tightening apparatus includes: inside cap, outer bearing cover and a flexible member group.
Wherein, inside cap contacts cooperation with described drive end bearing.
Outer bearing cover and described drive end bearing matched in clearance, and it is provided with N number of flexible member room；N is more than or equal to 1.Wherein, N number of flexible member room can be distributed uniformly and circumferentially on outer bearing cover, or the rule that can also take other form or be randomly distributed.
Flexible member group includes that N number of flexible member, each flexible member are arranged on flexible member indoor of described outer bearing cover；Described flexible member group applies an axial force to the outer ring of described drive end bearing；Described axial force is transferred on described inside cap by the outer ring of described drive end bearing, and described axial force and described inside cap can produce the frictional force stoping the outer ring of described drive end bearing to be moved at circumferencial direction.
In this embodiment, be equivalent to, in a upper embodiment, eliminate the first flexible member group in the bearing pre-tightening device of drive end bearing, make inside cap directly contact with drive end bearing simultaneously.
In addition, in one embodiment, gap-ratio drive end between outer bearing cover and the bearing outer ring of anti-drive end big, therefore for making anti-drive end use identical enclosing cover with drive end, can add annular between the outer bearing cover and bearing outer ring of drive end and adjust pad.It can be steel material that this annular adjusts pad.Such as, the adjustment pad of steel specifically can be may further be provided between flexible member group and bearing outer ring.
Can be seen that from such scheme, owing in this utility model, inside cap and outer bearing cover all coordinate with bearing clearance, and the flexible member group to bearing applying axial force it is respectively provided with in inside cap side and outer bearing cover side, the difference composition making the axial force of two flexible member groups prevents the rolling element in bearing from producing the axial pre tightening force slided when motor speed changes, the axial force of two flexible member groups can produce the frictional force stoping described bearing outer ring to move at circumferencial direction simultaneously, thus can reduce the abrasion even avoiding bearing to bearing chamber；And owing to bearing pre-tightened can be maintained by this cooperation mechanism, therefore improve the service life of bearing, and then the most therefore the life-span of whole motor is increased；And the technical scheme in this utility model remains in that the matched in clearance of bearing and bearing chamber, and motor assembling is easily implemented, and simplifies assembling process.Additionally, because flexible member alleviates the load that bearing excites, therefore, it is possible to reduce vibration and the noise of bearing chamber.
Additionally, bipolar machine is in the risk of client generation vibration exceeding the standard in reducing quality guarantee period；And owing to bearing chamber has longer service life, therefore add the competitiveness of motor product.Additionally, it is easy to change bearing at curstomer's site.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (6)
1. a motor bearings pre-tightening apparatus, described bearing (1) and bearing chamber (3) matched in clearance；It is characterized in that,
Described device includes:
Inside cap (4), is provided with M the first flexible member room (41)；M is more than or equal to 1；
First flexible member group (5), it includes M the first flexible member, and each first flexible member is arranged on described
In one the first flexible member room (41) of inside cap (4)；
Outer bearing cover (6), is provided with N number of second flexible member room (61)；N is more than or equal to 1；M is equal to N
Or M is not equal to N；
Second flexible member group (7), it include N number of second flexible member, each second flexible member be arranged on described outside
In one the second flexible member room (61) of bearing cap (6)；
Described inside cap (4) and described bearing (1) matched in clearance, and described first flexible member group (5) is to described
The outer ring (12) of bearing (1) applies the first axial force；Described outer bearing cover (6) and described bearing (1) matched in clearance,
And described second flexible member group (7) applies a second axial power to the outer ring (12) of described bearing (1)；Described first
The difference of axial force and described second axial force constitutes the axial pre tightening force of described bearing (1)；Described first axial force is with described
Second axial force can produce the frictional force stoping the outer ring (12) of described bearing (1) to be moved at circumferencial direction.
Device the most according to claim 1, it is characterised in that described first axial force is more than described second axial force.
Device the most according to claim 1, it is characterised in that described M the first flexible member room (41) exists
Described inside cap is distributed uniformly and circumferentially on (4)；Described N number of second flexible member room (61) is at described outer shaft
Hold and be distributed uniformly and circumferentially on lid (6).
4. a motor, including: drive end bearing and non-driven-end bearing, described drive end bearing and its bearing chamber gap
Coordinate, described non-driven-end bearing and its bearing chamber matched in clearance；It is characterized in that, described motor also includes:
The bearing pre-tightening device as claimed any one in claims 1 to 3 that corresponding drive end bearing is arranged；With
The bearing pre-tightening device as claimed any one in claims 1 to 3 that corresponding non-driven-end bearing is arranged.
Motor the most according to claim 4, it is characterised in that the bearing pre-tightened that described corresponding drive end bearing is arranged
In device, the axial fit clearance of the outer ring of inside cap and described drive end bearing is between 0.1～0.5mm.
6. a motor, including: drive end bearing and non-driven-end bearing, described drive end bearing and its bearing chamber gap
Coordinate, described non-driven-end bearing and its bearing chamber matched in clearance；It is characterized in that, described motor also includes:
The bearing pre-tightening device as claimed any one in claims 1 to 3 that corresponding non-driven-end bearing is arranged；With
The drive end bearing pre-tightening apparatus that corresponding drive end bearing is arranged；Described drive end bearing pre-tightening apparatus includes:
Inside cap, it contacts cooperation with described drive end bearing；
Outer bearing cover, itself and described drive end bearing matched in clearance, and it is provided with N number of flexible member room；N is more than
Equal to 1；
Flexible member group, it includes that N number of flexible member, each flexible member are arranged on an elasticity of described outer bearing cover
In element chamber；Described flexible member group applies an axial force to the outer ring of described drive end bearing；Described axial force passes through institute
The outer ring stating drive end bearing is transferred on described inside cap, and described axial force and described inside cap can produce resistance
The frictional force that only move at circumferencial direction in the outer ring of described drive end bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620094148.0U CN205622382U (en) | 2016-01-29 | 2016-01-29 | Motor bearing preloading device and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620094148.0U CN205622382U (en) | 2016-01-29 | 2016-01-29 | Motor bearing preloading device and motor |
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| Publication Number | Publication Date |
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| CN205622382U true CN205622382U (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620094148.0U Active CN205622382U (en) | 2016-01-29 | 2016-01-29 | Motor bearing preloading device and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396372A (en) * | 2020-04-08 | 2020-07-10 | 中车洛阳机车有限公司 | Method for reducing mechanical noise of locomotive blower |
-
2016
- 2016-01-29 CN CN201620094148.0U patent/CN205622382U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396372A (en) * | 2020-04-08 | 2020-07-10 | 中车洛阳机车有限公司 | Method for reducing mechanical noise of locomotive blower |
| CN111396372B (en) * | 2020-04-08 | 2021-04-13 | 中车洛阳机车有限公司 | Method for reducing mechanical noise of locomotive blower |
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