CN109861444B - Axial positioning mechanism of motor - Google Patents
Axial positioning mechanism of motor Download PDFInfo
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- CN109861444B CN109861444B CN201811593097.6A CN201811593097A CN109861444B CN 109861444 B CN109861444 B CN 109861444B CN 201811593097 A CN201811593097 A CN 201811593097A CN 109861444 B CN109861444 B CN 109861444B
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Abstract
The invention belongs to the field of sliding bearing motors, and particularly discloses a motor axial positioning mechanism which comprises an axial positioning structure arranged at the rear end of a motor, wherein the axial positioning structure comprises a positioning shaft connected to a motor shaft, a rolling bearing sleeved on the positioning shaft, an inner ring positioning piece used for positioning an inner ring of the rolling bearing on the positioning shaft and an outer ring positioning piece used for positioning an outer ring of the rolling bearing on a bearing seat of the motor, and a radial gap is formed between the outer ring positioning piece and the outer edge of the outer ring of the rolling bearing. Avoid the sliding bearing motor to generate axial float.
Description
Technical Field
The invention relates to the field of sliding bearing motors, in particular to an axial positioning mechanism of a motor.
Background
The motor shaft of the horizontal motor is usually supported by a sliding bearing, because when the sliding bearing works, a layer of oil film can be generated between the journal and the bearing bush by utilizing an oil wedge formed by two side gaps between the journal and the bearing bush. That is, the sliding bearing does not have dry friction between the journal and the bearing shell, but has liquid friction in the oil film when in operation. The journal and the bearing shell are not contacted at all, so the friction coefficient is small. The oil film between the journal and the bearing bush can evenly distribute the load on the bearing bush, and has the function of vibration reduction. The sliding bearing has stable work and low noise, can bear larger load and is particularly suitable for large motors.
To the preceding, all adopt the horizontal motor of slide bearing behind, combine fig. 1, fig. 2 shows, slide bearing 1 includes bearing frame (room) 102 and axle bush 101, be equipped with the axial clearance (two a points in fig. 2) between axle bush 101 of slide bearing 1 and motor shaft 2 (rotor), the axial clearance generally is 2~3mm, because the rotational speed is usually higher (nearly 3000 revolutions per minute) when motor shaft 2 rotates, the effect of axial clearance is to avoid motor shaft 2 and slide bearing 1's axle bush 101 direct contact, lead to the problem that the motor burns out because the friction produces a large amount of heats between the axle bush 101 of slide bearing 1 when motor shaft 2 rotates, thereby lead to the motor. However, at the same time, because there is an axial gap between the motor shaft 2 and the bearing bush 101 of the sliding bearing 1, the motor shaft 2 has no axial positioning, and the motor shaft 2 will move axially when rotating.
Disclosure of Invention
The invention aims to provide an axial positioning mechanism for a motor, and avoid axial movement of a sliding bearing motor.
In order to achieve the purpose, the invention adopts the following technical scheme:
the motor axial positioning mechanism comprises an axial positioning structure arranged at the rear end of a motor, wherein the axial positioning structure comprises a positioning shaft connected to a motor shaft, a rolling bearing sleeved on the positioning shaft, an inner ring positioning piece used for positioning an inner ring of the rolling bearing on the positioning shaft and an outer ring positioning piece used for positioning an outer ring of the rolling bearing on a bearing seat of the motor, and a radial gap is formed between the outer ring positioning piece and the outer edge of the outer ring of the rolling bearing.
The principle of the scheme is as follows:
the axial positioning structure is additionally arranged on the basis of the existing sliding bearing motor and is used for realizing the axial positioning of the motor shaft and avoiding the axial movement of the motor shaft.
The specific positioning principle of the axial positioning structure is as follows: the inner ring positioning is used for positioning the inner ring of the rolling bearing on the positioning shaft, the outer ring positioning piece is used for positioning the outer ring of the rolling bearing on the motor shell, the axial force of the motor shaft is transmitted to the inner ring of the rolling bearing, the inner ring of the rolling bearing transmits the axial force to the outer ring of the bearing through the balls of the rolling bearing, and the outer ring of the bearing is transmitted to the bearing seat of the motor through the outer ring positioning piece, so that the axial positioning of the motor. In addition, because the radial force that antifriction bearing can bear is less, and the radial force that the sliding bearing that has assembled on the motor can bear is far more than antifriction bearing, consequently set up radial clearance between outer lane retainer and the outer fringe of antifriction bearing outer lane, so, the antifriction bearing outer lane does not bear the radial force from other structures, when the radial drunkenness takes place for the motor shaft, radial clearance can provide the space of radial movement for antifriction bearing, that is to say the radial force of motor shaft does not transmit antifriction bearing, but all undertakes by the sliding bearing that has assembled on the motor, can avoid the radial force of motor shaft to cause the harm to antifriction bearing, improve antifriction bearing's life.
This scheme of adoption can reach following technological effect:
1. the axial positioning structure is additionally arranged at the end part of the motor shaft of the existing sliding bearing motor, and the axial force of the motor shaft is transmitted to the motor bearing seat through the rolling bearing, so that the axial positioning of the motor shaft is realized, and the axial movement is avoided.
2. Through the setting of radial clearance, can avoid antifriction bearing to bear radial force, improve antifriction bearing's life.
Further, the positioning shaft is coaxially welded with the motor shaft. One end of the positioning shaft is directly welded on the motor shaft, and the positioning shaft can be fixedly connected with the motor shaft.
Furthermore, the inner ring positioning piece comprises a first positioning step arranged on the positioning shaft and a locking nut which is sleeved on the positioning shaft through threads, one end of the inner ring of the rolling bearing is abutted against the first positioning step, and the other end of the inner ring of the rolling bearing is screwed and positioned on the positioning shaft through the locking nut. The first positioning step and the locking nut position the inner ring of the rolling bearing on the positioning shaft and are used for bearing the axial force of the motor shaft.
Furthermore, a locking collar is arranged between the locking nut and the inner ring of the rolling bearing. The anti-loosening retainer ring is used for preventing the locking nut from backing up after being locked on the positioning shaft, namely, preventing the locking nut from loosening.
Further, the locking retainer ring is a steel ring. The steel ring can bear larger pressing force and has good anti-loosening effect.
Furthermore, the outer ring positioning piece comprises a bearing sleeve and a bearing end cover, the bearing sleeve is pressed on the motor bearing seat, the bearing end cover is pressed on the bearing sleeve, a second positioning step is arranged on the inner ring of the bearing sleeve, one end of the outer ring of the rolling bearing is tightly abutted to the vertical surface of the second positioning step, the other end of the outer ring of the rolling bearing is tightly abutted to the bearing end cover, and the radial gap is arranged between the transverse plane of the second positioning step and the outer edge of the outer ring of the rolling bearing. And the second positioning step of the bearing sleeve and the bearing outer cover position and clamp the outer ring of the rolling bearing from two sides of the outer ring of the rolling bearing, so that the outer ring of the rolling bearing is positioned on the motor bearing seat.
Further, a bearing sleeve oil groove communicated with an oil circuit of a motor bearing chamber is formed in the bearing sleeve. Through injecting lubricating oil into the bearing housing oil groove, lubricating oil gets into in the bearing frame to the realization is to the lubrication of slide bearing.
Furthermore, an adjusting gasket is arranged between the bearing sleeve and the motor bearing seat. The adjusting shim facilitates accurate mounting of the bearing sleeve.
Further, the radial gap is 2 mm. This is the preferred radial gap width.
Drawings
FIG. 1 is a half-sectional view of an embodiment of the present invention taken along the axis of the motor shaft, with the right end of FIG. 1 being the rear end of the motor;
FIG. 2 is an enlarged view of the box in FIG. 1;
fig. 3 is an enlarged view of a portion a in fig. 2.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the bearing comprises a sliding bearing 1, a bearing bush 101, a bearing seat 102, a motor shaft 2, a rolling bearing 3, an outer ring 301, a ball 302, an inner ring 303, a positioning shaft 4, a first positioning step 40, a lock nut 5, a locking collar 6, a bearing outer cover 7, a bearing sleeve 8, a second positioning step 80, a radial gap 9, an oil hole 10, a bearing sleeve oil groove 11 and a fastening bolt 12.
As shown in fig. 1, fig. 2 and fig. 3, the motor axial positioning mechanism of this embodiment includes an axial positioning structure disposed at the rear end of the motor, and the axial positioning structure includes a positioning shaft 4 coaxially welded on the motor shaft 2, a rolling bearing 3 sleeved on the positioning shaft 4, an inner ring positioning member for positioning an inner ring 303 of the rolling bearing 3 on the positioning shaft 4, and an outer ring positioning member for positioning an outer ring 301 of the rolling bearing 3 on the bearing seat 102 of the motor.
The inner ring setting element is established at the lock nut 5 on the location axle 4 including setting up first location step 40 and the screw thread cover on the location axle 4, the inner circle 303 left end of antifriction bearing 3 supports tightly on first location step 40, the right-hand member is screwed up the location on location axle 4 through lock nut 5, still be equipped with locking rand 6 between the inner circle 303 of lock nut 5 and antifriction bearing 3, locking rand 6 is the steel ring, locking rand 6 is used for avoiding 5 locking of lock nut to take place to fall back on location axle 4 after, avoid lock nut 5 not hard up promptly, concrete locking connected mode is: four grooves are formed in the outer edge of the locking nut 5, and four clamping pieces which can be clamped into the four grooves are arranged on the locking clamping ring 6.
The outer ring positioning piece comprises a bearing sleeve 8 and a bearing outer cover 7, wherein the bearing sleeve 8 is pressed on the motor bearing seat 102 through a fastening bolt 12, the bearing outer cover 7 is pressed on the bearing sleeve 8 through the fastening bolt 12, a second positioning step 80 is arranged on the inner wall of the bearing sleeve 8, the left end of an outer ring 301 of the rolling bearing 3 abuts against the vertical surface of the second positioning step 80, the right end of the outer ring 301 of the rolling bearing 3 abuts against the bearing outer cover 7, and a radial gap 9 with the width of 2mm is arranged between the transverse straight surface of the second positioning step 80 and the outer edge of the outer ring 301. Set up the bearing housing oil groove 11 with the oil circuit intercommunication of bearing frame 102 on the bearing housing 8, bearing housing oil groove 11 even has oil filler point 10, injects lubricating oil into bearing housing oil groove 11 through oil filler point 10, and lubricating oil gets into in the bearing frame 102 to the realization is to sliding bearing 1's lubrication. An adjusting gasket is arranged between the bearing sleeve 8 and the bearing seat 102, so that the bearing sleeve 8 can be accurately installed on the bearing seat 102.
The specific assembly process of the invention is as follows:
firstly, the positioning shaft 4 is welded at the end part of the motor shaft 2, then the bearing sleeve 8 is installed on a bearing seat 102 of the motor through a fastening bolt 12, then the rolling bearing 3 is sleeved on the positioning shaft 4, the left end surface of an outer ring 301 of the rolling bearing 3 abuts against a vertical surface of a second positioning step 80 on the bearing sleeve 8, the left end surface of an inner ring 303 of the rolling bearing 3 abuts against a first positioning step 40 on the positioning shaft 4, a locking collar 6 is sleeved on the positioning shaft 4, a locking nut 5 is screwed on the right end surface of the inner ring 303 of the rolling bearing 3, the locking nut 5 is fixed by a clamping piece on the locking collar 6, finally, a bearing outer cover 7 is pressed on the bearing sleeve 8 through the fastening bolt 12, the right end surface of the outer ring 301 of the rolling bearing 3 is pressed by a bearing outer cover 7, and therefore the positioning of the outer ring 301.
The principle of the invention for preventing the motor shaft 2 from axial movement is as follows:
when the motor shaft 2 has a tendency of moving rightward, the axial force of the motor shaft 2 is transmitted to the inner ring 303 of the rolling bearing 3 through the first positioning step 40, the inner ring 303 of the rolling bearing 3 transmits the axial force to the outer ring 301 of the rolling bearing 3 through the balls 302 of the rolling bearing 3, the outer ring 301 of the rolling bearing 3 transmits the axial force to the bearing outer cover 7, and the bearing outer cover 7, the bearing sleeve 8 and the bearing seat of the motor shaft 2 are fixedly connected, so that the axial positioning of the motor shaft 2 is realized.
When the motor shaft 2 has a tendency of moving leftward, the axial force of the motor shaft 2 is transmitted to the inner ring 303 of the rolling bearing 3 through the lock nut 5, the inner ring 303 of the rolling bearing 3 transmits the axial force to the outer ring 301 of the rolling bearing 3 through the balls 302 of the rolling bearing 3, the outer ring 301 of the rolling bearing 3 transmits the axial force to the bearing sleeve 8, and the bearing outer cover 7, the bearing sleeve 8 and the bearing seat of the motor shaft 2 are fixedly connected, so that the axial positioning of the motor shaft 2 is realized.
In addition, because the radial force that the rolling bearing 3 can bear is smaller, and the radial force that the sliding bearing 1 that has been assembled on the motor can bear is far greater than the rolling bearing 3, set up the radial clearance 9 between the outer lane 301 outer fringe of the second positioning step 80 on the bearing housing 8, so, the outer lane 301 of the rolling bearing 3 does not bear the radial force from other structures, when the motor shaft 2 takes place the radial float, the radial clearance 9 can provide the space of radial movement for the rolling bearing 3, that is to say the radial force of the motor shaft 2 is not transmitted to the rolling bearing 3, but all born by the sliding bearing 1 that has been assembled on the motor, can avoid the radial force of the motor shaft 2 to cause the damage to the rolling bearing 3, have improved the life of the rolling bearing 3.
The invention is to add an axial positioning structure on the basis of the existing sliding bearing motor, which is used for realizing the axial positioning of the motor shaft 2 and avoiding the axial movement of the motor shaft 2. The invention does not need to change the structure of the existing sliding bearing motor and is convenient to install.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. Motor axial positioning mechanism, its characterized in that: the axial positioning structure comprises a positioning shaft connected to a motor shaft, a rolling bearing sleeved on the positioning shaft, an inner ring positioning piece for positioning an inner ring of the rolling bearing on the positioning shaft and an outer ring positioning piece for positioning an outer ring of the rolling bearing on a motor bearing seat, wherein a radial gap is arranged between the outer ring positioning piece and the outer edge of the outer ring of the rolling bearing, the outer ring positioning piece comprises a bearing sleeve pressed on the motor bearing seat and a bearing end cover pressed on the bearing sleeve, a second positioning step is arranged on the inner ring of the bearing sleeve, one end of the outer ring of the rolling bearing is tightly pressed on the vertical surface of the second positioning step, the other end of the outer ring of the rolling bearing is tightly pressed on the bearing end cover, a sliding bearing and the rolling bearing are arranged in a communicated working cavity by a bearing outer cover, and the radial gap is arranged between the transverse straight surface of the, and a bearing sleeve oil groove communicated with an oil circuit of a motor bearing chamber is formed in the bearing sleeve, and the radial clearance is 2 mm.
2. The motor axial positioning mechanism of claim 1, wherein: the positioning shaft is coaxially welded with the motor shaft.
3. The motor axial positioning mechanism of claim 1, wherein: the inner ring positioning piece comprises a first positioning step arranged on the positioning shaft and a locking nut arranged on the positioning shaft in a threaded sleeve mode, one end of an inner ring of the rolling bearing is abutted to the first positioning step, and the other end of the inner ring of the rolling bearing is screwed up and positioned on the positioning shaft through the locking nut.
4. The motor axial positioning mechanism of claim 3, wherein: and a locking collar is arranged between the locking nut and the inner ring of the rolling bearing.
5. The motor axial positioning mechanism of claim 4, wherein: the anti-loosening retainer ring is a steel ring.
6. The motor axial positioning mechanism of claim 1, wherein: and an adjusting gasket is arranged between the bearing sleeve and the motor bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811593097.6A CN109861444B (en) | 2018-12-25 | 2018-12-25 | Axial positioning mechanism of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811593097.6A CN109861444B (en) | 2018-12-25 | 2018-12-25 | Axial positioning mechanism of motor |
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| Publication Number | Publication Date |
|---|---|
| CN109861444A CN109861444A (en) | 2019-06-07 |
| CN109861444B true CN109861444B (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811593097.6A Active CN109861444B (en) | 2018-12-25 | 2018-12-25 | Axial positioning mechanism of motor |
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| CN (1) | CN109861444B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315306B (en) * | 2021-06-01 | 2022-04-08 | 南京工程学院 | Axial play energy recovery system for wet motor |
| CN113586603A (en) * | 2021-09-06 | 2021-11-02 | 上海电气集团上海电机厂有限公司 | Axial limiting device for rolling bearing of horizontally-installed sliding bearing motor |
| CN113982910A (en) * | 2021-11-29 | 2022-01-28 | 黄秀芳 | Heating tool for rolling bearing and gear of reciprocating pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2558146Y (en) * | 2002-07-19 | 2003-06-25 | 浙江胜华波汽车电器有限公司 | Armature axle three support device for car seat motor |
| CN203086275U (en) * | 2013-02-04 | 2013-07-24 | 西安泰富西玛电机有限公司 | Large-power motor's rolling bearing lubrication system |
| CN203607978U (en) * | 2013-11-22 | 2014-05-21 | 江苏远东电机制造有限公司 | High temperature horizontal motor bearing support structure |
| EP2975739A1 (en) * | 2014-07-17 | 2016-01-20 | Siemens Aktiengesellschaft | Dynamo-electric machine with bearing assembly |
-
2018
- 2018-12-25 CN CN201811593097.6A patent/CN109861444B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2558146Y (en) * | 2002-07-19 | 2003-06-25 | 浙江胜华波汽车电器有限公司 | Armature axle three support device for car seat motor |
| CN203086275U (en) * | 2013-02-04 | 2013-07-24 | 西安泰富西玛电机有限公司 | Large-power motor's rolling bearing lubrication system |
| CN203607978U (en) * | 2013-11-22 | 2014-05-21 | 江苏远东电机制造有限公司 | High temperature horizontal motor bearing support structure |
| EP2975739A1 (en) * | 2014-07-17 | 2016-01-20 | Siemens Aktiengesellschaft | Dynamo-electric machine with bearing assembly |
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| CN109861444A (en) | 2019-06-07 |
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