CN208966886U - The bearing pre-tightening structure of main shaft - Google Patents
The bearing pre-tightening structure of main shaft Download PDFInfo
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- CN208966886U CN208966886U CN201821709989.3U CN201821709989U CN208966886U CN 208966886 U CN208966886 U CN 208966886U CN 201821709989 U CN201821709989 U CN 201821709989U CN 208966886 U CN208966886 U CN 208966886U
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- bearing
- rotor
- bearing block
- blind hole
- main shaft
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Abstract
The utility model discloses a kind of bearing pre-tightening structure of main shaft, rotor including bearing block and inside bearing block, the outer cover of rotor inside bearing block is equipped with bearing, rotor exterior is arranged with nut, nut is connect with rotor, the inner face of bearing block and the rotor exterior between the bearing of the leftmost side are set with preload washer, the inner face for pre-tightening washer one end and bearing block offsets, the outer ring of the other end and the bearing for being located at the leftmost side offsets, washer is pre-tightened towards being provided with several on the end face of bearing block inner face side in circumferentially distributed blind hole, spring is embedded in each blind hole, the inner face of spring one end and bearing block offsets, the interior bottom of the other end and blind hole offsets；For rotor inside the utility model in low speed rotation, the firmly beforehand means of bearing are that rigidity pre-tightens, when rotor when rotating at high speed, the firmly beforehand means of bearing are that elasticity pre-tightens, so, so that the advantages of main shaft has both two kinds of bearing pre-tightened modes.
Description
Technical field
The utility model relates to spindle technology fields, and in particular to a kind of bearing pre-tightening structure of main shaft.
Background technique
When main shaft uses angular contact bearing, bearing is required to pre-tighten and could be used, the axis in currently marketed main shaft
Holding preload to be divided into the advantages of rigidity pre-tightens and elasticity pre-tightens, and rigidity pre-tightens is that main shaft is reversed, axial stiffness is good, and rotor is not when processing
Can play, can carry out rigid tapping etc. biaxially stress high rigidity processing, disadvantage is exactly that running speed is low；What elasticity pre-tightened
Advantage is exactly running speed height, and high in machining efficiency, processed surface smoothness is good, the disadvantage is that main shaft only has unidirectional axial stiffness,
Reversed stress is bigger can cause rotor shifting, cannot do the high rigidity processing of the biaxially stress such as rigid tapping.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of bearing pre-tightening structure of main shaft, internal rotor
In low speed rotation, the firmly beforehand means of bearing are that rigidity pre-tightens, when rotor when rotating at high speed, the firmly beforehand means of bearing are elasticity
It pre-tightens, so, so that the advantages of main shaft has both two kinds of bearing pre-tightened modes.
A kind of bearing pre-tightening structure of main shaft disclosed by the utility model turns including bearing block and inside bearing block
Son, the outer cover of the rotor inside bearing block equipped with several along the bearing of rotor axial directional spreding, each bearing
The inner wall of outer ring and bearing block is affixed, and the inner ring of each bearing and the outer wall of rotor are affixed, and rotor exterior is arranged with for holding out against
The nut of the inner ring of bearing, nut are connect with rotor, outside the inner face of bearing block and rotor between the bearing of the leftmost side
Portion is set with the preload washer for pushing tow bearing outer ring, and the inner face for pre-tightening washer one end and bearing block offsets, the other end with
Outer ring positioned at the bearing of the leftmost side offsets, and pre-tightens washer towards being provided with several on the end face of bearing block inner face side and is in
Circumferentially distributed blind hole, is embedded with spring in each blind hole, and the inner face of spring one end and bearing block offsets, the other end with it is blind
The interior bottom in hole offsets.
An embodiment according to the present utility model pre-tightens washer towards being provided on the end face of bearing block inner face side
Eight or eight or more blind holes, and blind hole is uniformly distributed in circumferential.
An embodiment according to the present utility model, be provided on the inner wall of blind hole open end can cooperate with spring be oriented to
Spring is facilitated to be inserted into the annular guide surface in blind hole.
An embodiment according to the present utility model, pre-tightens between the internal perisporium of washer and rotor that there are gaps.
An embodiment according to the present utility model, there are two bearings for rotor exterior suit.
For rotor inside the utility model in low speed rotation, the firmly beforehand means of bearing are that rigidity pre-tightens, when rotor is in height
When speed rotation, the firmly beforehand means of bearing are that elasticity pre-tightens, so, so that main shaft has both the excellent of two kinds of bearing pre-tightened modes
Point.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the schematic cross-sectional view of the utility model；
Fig. 2 is amplified structural schematic diagram at A in Fig. 1.
Specific embodiment
Multiple embodiments that the utility model will be disclosed with schema below, as clearly stated, in many practices
Details will be explained in the following description.It should be appreciated, however, that the details in these practices does not apply this with limitation practical new
Type.That is, the details in these practices is non-essential in some embodiments of the utility model.In addition, for letter
For the sake of changing schema, some known usual structures and component will be painted it in the drawings in simply illustrative mode.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and non-specifically
The meaning of order or cis-position is censured, it is also non-to limit the utility model, it is retouched just for the sake of difference with same technique term
The component stated or operation are not understood to indicate or imply its relative importance or implicitly indicate indicated technology
The quantity of feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not within the protection scope of the requires of the utility model.
The bearing pre-tightening structure of the main shaft of the utility model, the rotor 2 including bearing block 1 and inside bearing block 1, position
The outer cover of rotor 2 inside bearing block 1 equipped with several along 2 axial directional distribution of rotor bearing 3, each bearing 3
Outer ring and the inner wall of bearing block 1 are affixed, and the outer wall of the inner ring and rotor 2 of each bearing 3 is affixed, and 2 outer cover of rotor is equipped with and is used for
The nut 4 of the inner ring of bearing 3 is held out against, nut 4 is connect with rotor, and threaded connection or interference fit can be used in nut 4 and rotor
Connection type, the inner face of bearing block 1 and 2 outer cover of rotor between the bearing 3 of the leftmost side are equipped with and are used for pushing tow bearing 3
The preload washer 5 of outer ring, pre-tightens 5 one end of washer and the inner face of bearing block 1 offsets, the other end and the bearing 3 for being located at the leftmost side
Outer ring offset, pre-tighten washer 5 towards being provided with several on the end face of 1 inner face side of bearing block in circumferentially distributed blind hole
51, spring 6 is embedded in each blind hole 51, and 6 one end of spring and the inner face of bearing block 1 offset, the other end and blind hole 51
Interior bottom offsets；Main shaft pre-tightens two end faces of washer respectively with the inner face of bearing block and positioned at the leftmost side in assembly
The outer ring of bearing offsets, and spring is compressive state at this time, i.e. bearing is rigid Pre strained state, when rotor low speed rotation generate heat it is low,
It can carry out high rigidity processing；When rotor becomes high speed rotation from low speed, fever is high, and rotor is heated elongated, while rotor can band
Dynamic bearing is mobile, pre-tighten at this time washer under the action of the spring can the outer ring to the bearing for being located at the leftmost side pretightning force is provided, this
When bearing from rigidity preload become elastic preload, rotor can run at high speed.
Washer 5 is pre-tightened towards the blind hole 51 for being provided with eight or eight or more on the end face of 1 inner face side of bearing block, and
Blind hole 51 is uniformly distributed in circumferential；After by using this structure, when the spring push in blind hole pre-tightens washer, it can be improved
Pre-tighten stability when washer movement.
Being provided on the inner wall of 51 open end of blind hole can cooperate guiding to facilitate spring 6 to be inserted into blind hole 51 with spring 6
Annular guide surface 52；After by using this structure, when assembling main shaft, spring can be easily inserted into blind hole, and
When rotor is slowly run by being reduced at a high speed, rotor cooling, rotor, which can be shunk, to shorten, and the pushing tow of bearing meeting at this time pre-tightens washer, bullet
Spring is pressed into blind hole, and under the action of annular guide surface, spring can be more easily retracted into blind hole.
There are gaps between the internal perisporium and rotor 2 of preload washer 5；After by using this structure, preload can be avoided
Friction is generated between washer and rotor.
There are two bearings 3 for 2 outer cover of rotor dress；After by using this structure, stabilization when rotor rotation can be improved
Property.
Upper described only the embodiments of the present invention, is not intended to limit the utility model.For this field
For technical staff, various modifications and changes may be made to the present invention.The interior institute of all spirit and principle in the utility model
Any modification, equivalent substitution, improvement and etc. of work should all include within the scope of the claims of the utility model.
Claims (5)
1. the bearing pre-tightening structure of main shaft including bearing block (1) and is located at bearing block (1) internal rotor (2), feature exists
In: it is located at bearing of the outer cover of bearing block (1) internal rotor (2) equipped with several along rotor (2) axial directional distribution
(3), the outer ring of each bearing (3) and the inner wall of bearing block (1) are affixed, the outer wall phase of the inner ring and rotor (2) of each bearing (3)
Patch, rotor (2) outer cover are equipped with the nut (4) for holding out against the inner ring of bearing (3), and the nut (4) connect with rotor,
The inner face of the bearing block (1) and rotor (2) outer cover between the bearing (3) of the leftmost side are equipped with and are used for pushing tow bearing
(3) the preload washer (5) of outer ring, described preload washer (5) one end and the inner face of bearing block (1) offset, the other end be located at
The outer ring of the bearing (3) of the leftmost side offsets, and preload washer (5) is towards being arranged on the end face of bearing block (1) inner face side
Have several in circumferentially distributed blind hole (51), be embedded with spring (6) in each blind hole (51), described spring (6) one end with
The inner face of bearing block (1) offsets, and the other end and the interior bottom of blind hole (51) offset.
2. the bearing pre-tightening structure of main shaft according to claim 1, which is characterized in that the preload washer (5) is towards axis
Hold and be provided with eight or eight or more blind holes (51) on the end face of seat (1) inner face side, and blind hole (51) in it is circumferential uniformly
Distribution.
3. the bearing pre-tightening structure of main shaft according to claim 1 or 2, which is characterized in that blind hole (51) open end
Inner wall on be provided with can with spring (6) cooperate guiding to facilitate spring (6) to be inserted into the annular guide surface in blind hole (51)
(52)。
4. the bearing pre-tightening structure of main shaft according to claim 1, which is characterized in that the inner circumferential for pre-tightening washer (5)
There are gaps between wall and rotor (2).
5. the bearing pre-tightening structure of main shaft according to claim 1, which is characterized in that rotor (2) outer cover is equipped with
Two bearings (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821709989.3U CN208966886U (en) | 2018-10-22 | 2018-10-22 | The bearing pre-tightening structure of main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821709989.3U CN208966886U (en) | 2018-10-22 | 2018-10-22 | The bearing pre-tightening structure of main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208966886U true CN208966886U (en) | 2019-06-11 |
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ID=66758962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821709989.3U Active CN208966886U (en) | 2018-10-22 | 2018-10-22 | The bearing pre-tightening structure of main shaft |
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| Country | Link |
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| CN (1) | CN208966886U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795077A (en) * | 2020-06-09 | 2020-10-20 | 江苏理工学院 | Bearing preloading device |
| CN113483026A (en) * | 2021-07-01 | 2021-10-08 | 厦门势拓伺服科技股份有限公司 | Electric main shaft lower bearing pressing spacer structure |
| CN113847354A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Low-noise vibration high-speed motor bearing adjustable pre-tightening device |
| CN114087272A (en) * | 2021-11-29 | 2022-02-25 | 中国航发哈尔滨轴承有限公司 | Pre-tightening washer |
| CN116372198A (en) * | 2023-04-07 | 2023-07-04 | 惠州市景阳科技有限公司 | Motorized spindle with pre-tightening structure |
-
2018
- 2018-10-22 CN CN201821709989.3U patent/CN208966886U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795077A (en) * | 2020-06-09 | 2020-10-20 | 江苏理工学院 | Bearing preloading device |
| CN113483026A (en) * | 2021-07-01 | 2021-10-08 | 厦门势拓伺服科技股份有限公司 | Electric main shaft lower bearing pressing spacer structure |
| CN113847354A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Low-noise vibration high-speed motor bearing adjustable pre-tightening device |
| CN113847354B (en) * | 2021-09-28 | 2022-07-12 | 珠海格力电器股份有限公司 | Low-noise vibration high-speed motor bearing adjustable pre-tightening device |
| CN114087272A (en) * | 2021-11-29 | 2022-02-25 | 中国航发哈尔滨轴承有限公司 | Pre-tightening washer |
| CN116372198A (en) * | 2023-04-07 | 2023-07-04 | 惠州市景阳科技有限公司 | Motorized spindle with pre-tightening structure |
| CN116372198B (en) * | 2023-04-07 | 2023-09-12 | 惠州市景阳科技有限公司 | Motorized spindle with pre-tightening structure |
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