CN102049534A - Nut pre-tightening structure for mainshaft bearing of heavy duty lathe - Google Patents
Nut pre-tightening structure for mainshaft bearing of heavy duty lathe Download PDFInfo
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- CN102049534A CN102049534A CN 201010532696 CN201010532696A CN102049534A CN 102049534 A CN102049534 A CN 102049534A CN 201010532696 CN201010532696 CN 201010532696 CN 201010532696 A CN201010532696 A CN 201010532696A CN 102049534 A CN102049534 A CN 102049534A
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- pressing structure
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Abstract
The invention discloses a nut pre-tightening structure for the mainshaft bearing of a heavy duty lathe. The nut pre-tightening structure comprises a nut and a washer between the nut and the inner ring of the bearing in the installation state, wherein a group of axial hydraulic cylinders are uniformly disposed on the nut body along the upper periphery; the pistons of all of the hydraulic cylinders act on the washer; the oil inlets of all of the hydraulic cylinders are sequentially communicated with one another; an exhaust hole with a plug is formed on the uppermost hydraulic cylinder; and an oil inlet pipe with a valve is arranged on a pipe communicated with the oil inlets. Accordingly, the nut pre-tightening structure has the advantages of high precision and reliability in pre-tightening.
Description
Technical field
The present invention relates to a kind of heavy-duty engine lathe main shaft bearing nut pre-pressing structure.
Background technology
The heavy-duty engine lathe main shaft bearing is the requirement of satisfying machining accuracy, need guarantee by the mode of bearing nut pretension.Known, bearing nut uses traditional method that 1: 12 tapering bearing is carried out pretension at present, but there are two defectives in this method, one of them defective is that artificial pretightning force is inhomogeneous, be easy to cause the precision of bearing to reduce, not only influence crudy, and bearing can be subjected to the influence of complex stress, the life-span also can reduce greatly; Another defective be exactly behind the pretension locking unreliable, especially under the bigger situation of heavy-duty engine lathe processing vibrations.Therefore, be necessary to develop the bearing pre-tightened mode that makes new advances, to satisfy the requirement of running precision.
Summary of the invention
In view of this, it is low to the present invention is directed to the pre-clamping method precision of present heavy-duty engine lathe main shaft bearing nut, and the insecure defective of pretension, has proposed a kind of not only precision height, and the reliable heavy-duty engine lathe master of pretension week bearing nut pre-pressing structure.
The technical solution used in the present invention is:
Heavy-duty engine lathe main shaft bearing nut pre-pressing structure of the present invention, comprise nut and the packing ring between between the inner ring of this nut and bearing under installment state, on the nut body of described nut, circumferentially be provided with one group of axial hydraulic cylinder equably, the piston action of all hydraulic cylinders is in described packing ring, and the oil-in of all hydraulic cylinder is communicated with successively, and has the steam vent that has plug on uppermost hydraulic cylinder;
On the pipeline that is communicated with described oil-in, be provided with the oil inlet pipe that has valve.
Heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to technical solution of the present invention, at bearing nut, process one group of hydraulic cylinder on the just said nut, these hydraulic cylinders all are communicated with, thereby, can guarantee the pressure basically identical that the hydraulic pressure in all hydraulic cylinder has, and difference only limits to the formed pressure of the degree of depth of hydraulic oil in the vertical direction, this pressure is negligible under the condition of hydraulic oil hydraulic pressure, thereby has guaranteed to use one group of hydraulic cylinder to apply the uniformity of pretightning force.And then, having guaranteed the assembly precision of bearing, can more approach projected life service life.
Because end after can the hydraulic oil in hydraulic cylinder reaching predetermined pressure by said valve, and because the hydraulic cylinder does not here participate in frequent driving, only be used for the realization of predetermined thrust, its sealing is not easy to lose efficacy, and has guaranteed the high reliability of pretension.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, described valve is a non-return valve.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, described non-return valve is a check valve.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, the oil-in of all hydraulic cylinders is connected in parallel by pipeline, and this pre-pressing structure also is provided with the communicating pipe that is communicated with the hydraulic cylinder oil pocket successively.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, described communicating pipe is along the circumferential setting of described nut.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, described oil inlet pipe is arranged at a side of described nut.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, described oil inlet pipe is arranged at the top of a side of described nut.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, the number of described hydraulic cylinder is 12.
Above-mentioned heavy-duty engine lathe main shaft bearing nut pre-pressing structure, the cavity of described hydraulic cylinder is the counterbore that is formed on the described nut.
Description of drawings
Below in conjunction with Figure of description in detail technical scheme of the present invention is described in detail, makes those skilled in the art better understand the present invention, wherein:
Fig. 1 looks schematic diagram for the master according to a kind of heavy-duty engine lathe main shaft bearing nut pre-pressing structure of technical solution of the present invention.
Fig. 2 is the left TV structure schematic diagram corresponding to Fig. 1.
Fig. 3 is the y-y cutaway view.
Fig. 4 is the u-u cutaway view.
Fig. 5 is the r-r cutaway view.
Fig. 6 is the q-q cutaway view.
Among the figure: 1, communicating pipe, 2, nut, 3, packing ring, 4, bearing, 5, inner ring, 6, check valve, 7, oil inlet pipe, 8, threeway, 9, hydraulic cylinder, 10, steam vent, 11, oil-in.
The specific embodiment
With reference to the heavy-duty engine lathe main shaft bearing nut pre-pressing structure shown in the attached Fig. 1 and 2 of explanation, comprise nut 2 and under installment state between the packing ring 3 of 5 of the inner rings of this nut and bearing 4, on the nut body of described nut, circumferentially be provided with one group of axial hydraulic cylinder 9 equably, the piston action of all hydraulic cylinders is in described packing ring, and the oil-in 11 of all hydraulic cylinder is communicated with successively, and has the steam vent 10 that has plug on uppermost hydraulic cylinder;
On the pipeline that is communicated with described oil-in, be provided with the oil inlet pipe 7 that has valve.
During use, play hydraulic oil from described oil inlet pipe 7 usefulness high pressure oil guns, gas is discharged by steam vent 10 in the oil pipe, with plug steam vent 10 is shut after waiting the gas emptying, increase with pressure oil pressure, the pressure of each oil cylinder evenly strengthens, and after pressure reaches requirement, pulls down the high pressure oil gun, hydraulic oil just is enclosed in each hydraulic cylinder, pretightning force is big like this, and pretension is even, is not easy behind the pretension to become flexible.
The nut here is the same with the existing bearing nut on the bearing nut overall structure just, has just processed hydraulic cylinder on this nut, nature, and what processed is cylinder body, also cooperates corresponding piston, in other words push rod.
The effect of packing ring mainly provides uniform pushing tow, is analogous to backing plate, relies on the rigidity of himself to carry out the transmission of power.
About described valve, selectable a lot, comprise that the valve of all kinds of stop valves all can use at this, certainly, a kind of preferable selection is to use non-return valve, has better control action, and overall structure is also compact.
As further considering, can select the valve of other type, such as considering from sealing grade, certainly, it is big more that non-return valve has a buffer brake, and the characteristics that sealing effectiveness is good more are especially for as the employed check valve 6 of Fig. 1.Therefore, as a kind of preferable selection, shown non-return valve is a check valve.
Because gas can float in liquid automatically, therefore, oil-in of oil-feed also satisfies the excessive requirement of gas under a stable condition.But the oil-in as all hydraulic cylinders of a kind of preferable selection is connected in parallel by pipeline, and this pre-pressing structure also is provided with the communicating pipe 1 that is communicated with the hydraulic cylinder oil pocket successively, so just can form oil-in and only be used for oil-feed, and be used for exhaust communicating pipe to a certain extent, certainly, the hydraulic oil that also can circulate.
Say that as preceding institute the hydraulic cylinder here only is used for applying of jacking force,, just can finish release as long as open described plug so, to overhaul normally so the required consideration of its oil return is just simple.
For simplified structure, described communicating pipe also adapts to the layout of axle along the circumferential setting of described nut.
The oil-feed exhaust should be satisfied certain logicality, and for this reason, described oil inlet pipe is arranged at a side of described nut, and controllability is better.
Further, in order to obtain better controllability, described oil inlet pipe is arranged at the top of a side of described nut.
Applying of pretightning force is even as much as possible, so just needs hydraulic cylinder to have suitable data, and be preferable, and the number of described hydraulic cylinder is 12.
Described hydraulic cylinder processes on nut, and individual smaller, the cavity that a kind of preferable selection is a hydraulic cylinder is the counterbore that is formed on the described nut, and the designing for manufacturing cost is low, and performance is good.
Claims (9)
1. heavy-duty engine lathe main shaft bearing nut pre-pressing structure, comprise nut (2) and the packing ring (3) between between the inner ring (5) of this nut and bearing (4) under installment state, it is characterized in that: on the nut body of described nut, circumferentially be provided with one group of axial hydraulic cylinder (9) equably, the piston action of all hydraulic cylinders is in described packing ring, and the oil-in of all hydraulic cylinder (11) is communicated with successively, and has the steam vent (10) that has plug on uppermost hydraulic cylinder;
On the pipeline that is communicated with described oil-in, be provided with the oil inlet pipe (7) that has valve.
2. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 1, it is characterized in that: described valve is a non-return valve.
3. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 2, it is characterized in that: described non-return valve is a check valve.
4. according to the arbitrary described heavy-duty engine lathe main shaft bearing nut pre-pressing structure of claim 1 to 3, it is characterized in that: the oil-in of all hydraulic cylinders is connected in parallel by pipeline, and this pre-pressing structure also is provided with the communicating pipe (1) that is communicated with the hydraulic cylinder oil pocket successively.
5. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 4, it is characterized in that: described communicating pipe is along the circumferential setting of described nut.
6. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 5, it is characterized in that: described oil inlet pipe is arranged at a side of described nut.
7. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 6, it is characterized in that: described oil inlet pipe is arranged at the top of a side of described nut.
8. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 1, it is characterized in that: the number of described hydraulic cylinder is 12.
9. heavy-duty engine lathe main shaft bearing nut pre-pressing structure according to claim 8, it is characterized in that: the cavity of described hydraulic cylinder is the counterbore that is formed on the described nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105326964A CN102049534B (en) | 2010-11-05 | 2010-11-05 | Nut pre-tightening structure for mainshaft bearing of heavy duty lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105326964A CN102049534B (en) | 2010-11-05 | 2010-11-05 | Nut pre-tightening structure for mainshaft bearing of heavy duty lathe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102049534A true CN102049534A (en) | 2011-05-11 |
| CN102049534B CN102049534B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105326964A Active CN102049534B (en) | 2010-11-05 | 2010-11-05 | Nut pre-tightening structure for mainshaft bearing of heavy duty lathe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108471A (en) * | 2015-09-23 | 2015-12-02 | 中国重型机械研究院股份公司 | Adjustable pretightening and fixing device |
| CN105312596A (en) * | 2014-07-31 | 2016-02-10 | 许保康 | Hydraulic pretightening structure for bearing |
| CN105465194A (en) * | 2016-01-28 | 2016-04-06 | 泊头巨人重工机械有限公司 | Large precise double-row ball roller bearing adjustment structure and adjustment method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719352A (en) * | 1985-06-04 | 1988-01-12 | Horiba, Ltd. | Apparatus for intermitting beam of light for use in gas analyzer |
| US5803619A (en) * | 1994-12-13 | 1998-09-08 | Koyo Seiko Co., Ltd. | Antifriction bearing pre-loading device and shaft bearing structure |
| US6042273A (en) * | 1998-10-28 | 2000-03-28 | Colonial Tool Group Inc. | Adjustable preload spindle |
| CN201033353Y (en) * | 2007-06-06 | 2008-03-12 | 上海重型机床厂有限公司 | Numerical control heavy duty engine lathe head shaft fore bearing seat structure |
| CN101190460A (en) * | 2006-11-29 | 2008-06-04 | 大隈株式会社 | Spindle structure |
| CN201841272U (en) * | 2010-11-05 | 2011-05-25 | 山东普利森集团有限公司 | Heavy-duty lathe spindle bearing nut pretightening structure |
-
2010
- 2010-11-05 CN CN2010105326964A patent/CN102049534B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719352A (en) * | 1985-06-04 | 1988-01-12 | Horiba, Ltd. | Apparatus for intermitting beam of light for use in gas analyzer |
| US5803619A (en) * | 1994-12-13 | 1998-09-08 | Koyo Seiko Co., Ltd. | Antifriction bearing pre-loading device and shaft bearing structure |
| US6042273A (en) * | 1998-10-28 | 2000-03-28 | Colonial Tool Group Inc. | Adjustable preload spindle |
| CN101190460A (en) * | 2006-11-29 | 2008-06-04 | 大隈株式会社 | Spindle structure |
| CN201033353Y (en) * | 2007-06-06 | 2008-03-12 | 上海重型机床厂有限公司 | Numerical control heavy duty engine lathe head shaft fore bearing seat structure |
| CN201841272U (en) * | 2010-11-05 | 2011-05-25 | 山东普利森集团有限公司 | Heavy-duty lathe spindle bearing nut pretightening structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312596A (en) * | 2014-07-31 | 2016-02-10 | 许保康 | Hydraulic pretightening structure for bearing |
| CN105108471A (en) * | 2015-09-23 | 2015-12-02 | 中国重型机械研究院股份公司 | Adjustable pretightening and fixing device |
| CN105465194A (en) * | 2016-01-28 | 2016-04-06 | 泊头巨人重工机械有限公司 | Large precise double-row ball roller bearing adjustment structure and adjustment method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102049534B (en) | 2012-07-04 |
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