CN101705991B - Reduction gear box - Google Patents
Reduction gear box Download PDFInfo
- Publication number
- CN101705991B CN101705991B CN2009102258892A CN200910225889A CN101705991B CN 101705991 B CN101705991 B CN 101705991B CN 2009102258892 A CN2009102258892 A CN 2009102258892A CN 200910225889 A CN200910225889 A CN 200910225889A CN 101705991 B CN101705991 B CN 101705991B
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- box
- box body
- depression
- casing
- reduction gear
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- 230000009467 reduction Effects 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 210000000481 breast Anatomy 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 abstract description 3
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention relates to a reduction gear box, belonging to the technical field of railway vehicle traction gear drive device. The gear box comprises a box body, wherein the outside of the box body is provided with a great gear axle hole; the whole great gear axle hole appears like stairs, the aperture of the inner section is larger than that of the outer section; the inner section and outer section are separately provided with at least two sealing grooves which combines the corresponding structure of the great gear axle to form a sealed maze; the box body is arranged on the lower part of the great gear axle hole to form a pit which inclines upward and faces the box body, the deepest position of the pit reaches the lower part of the outermost sealing groove of the great gear axle hole; and the lower parts of the sealing grooves are provided separately with at least one vertical hole which is communicated with the pit. Therefore, lubricating oil which flows in the sealing grooves can flow in the inclined pit by timely and smoothly passing through the vertical hole and then flow back in the box body, thus not affecting the tightness of the sealing grooves; in addition, the inclined pit can be formed by casting when the box body is shaped, and the vertical hole can be drilled by directly using a drill arm in the great gear axle hole without tooling, thus the drilling is very convenient. The reduction gear box is applicable to the light rail subway and the railway vehicle with a speed of less than 160Km/h.
Description
Technical field
The present invention relates to a kind of reduction gear box, especially a kind of improvement of gear-box oil return structure belongs to rail truck traction gear technical field of driving.Be mainly used in the rail truck below subway, light rail and the 160Km/h speed.
Background technique
Reduction gear box is the vital part of rail truck traction gear drive unit, and its quality good or not directly has influence on the operational situation and the life-span of retarder.In train travelling process; Lubricant oil can be along axletree slowly infiltration outside deceleration box of rotation; Lubricant oil can gather in the sealing labyrinth simultaneously; If lubricant oil is flowed back in the speed reducer, will leak gradually, finally cause the inner bearing of speed reducer, gear to damage because of lacking lubricant oil.This obviously is definitely unallowed.
For a long time; The reduction gear box of rail truck traction gear drive unit is as depicted in figs. 1 and 2; The outside of casing 2 is shaped on gearwheel axis hole 3; This gearwheel axis hole integral body is stepped, and medial aperture is shaped on the groove of two seals at least that forms the sealing labyrinth with the Large Gear Shaft During counter structure respectively greater than aperture, the outside in the inboard and the outside.Oil return structure wherein is: process the drainage inclined-plane 4 that ecto-entad tilts between the gearwheel axis hole outside and the inboard, thereby as having opened downward-sloping irrigation canals and ditches in the casing, can the lubricant oil that accumulate in the seal groove be introduced box house.
Yet facts have proved that the gradient of above-mentioned plane of inclination is limited, oil return speed is slow; And owing to can't therefore can not always there be a spot of lubricant oil to be deposited in the seal groove through the lowest part of all seal grooves with the lubricant oil total reflux in the seal groove to box house.In addition, the plane of inclination makes seal groove fracture occur, thus deterioration sealing effect.The processing of plane of inclination is installed on the Milling machineshorizontal and mills out processing difficulties after need making casing inclination several angle by frock.
Retrieval is found; Application number is that 03131680.8 one Chinese patent application discloses a kind of seal arrangement that is specially adapted to adopt the bullet train power car driving gearbox of oil lubrication; Has contactless labyrinth seal mechanism; And the inner chamber that leads to casing by the drainback passage that sealing mechanism is drawn; And in drainback passage, being provided with the oil return buffer cavity with it, the outlet port of final spill port is located at below the internal memory lubricant oil pasta line of oil sump of casing, and final spill port makes oil return buffer cavity and oil sump connect.It is comparatively complicated that this structure seems, need cast out a cavity at the outer wall of gear housing, makes the inner chamber of this cavity and gear-box main body couple together with method for processing again.During oil return, lubricant oil flows to cavity earlier and flows back to inside, gear-box master chamber again.Owing to increased exocoel, it is complicated that casting and machining become, and owing to increased exocoel, must take seal approach to exocoel.
Secondly; Application number is the self-scavenging hybrid lubrication subsystem that 95193561.5 Chinese patent discloses a kind of main transmission gearbox; Comprise an oil sump that becomes this gear-box overall structure extension part; Make the dynamic Liquid Surface of the lubricant medium in the oil sump exceed the distance that gear-box bottom one is scheduled to, the radially discontinuous nozzle entry that defines between columnar portion and throat, this inlet flows to another oil sump with higher liquid level through the lubricant medium that the jet pipe guiding is collected in the gear-box bottom.Lubricant medium in this runner of interaction partners between the gear-box sidewall of rotational circle annular planet supporting disk and structural modification applies a viscosity pump function, lubricant medium is flowed through therebetween, and be transported to higher liquid level through jet pipe.This structure has increased by two oil back chambers outside main box body and has connected these two chamber drainback passages and jet etc., and structure is more complicated, has not only increased casting, mechanical processing difficulty, and has increased the sealability requirement in chamber.
In addition; Application number is that 03245745.6 Chinese invention patent discloses a kind of flexible compound gear-box; Comprise upper box, lower box, have the top box that is split-type structural with casing to heal up between last lower box and nowel heals up, top box heals up and upper box, nowel heal up and lower box between all adopt the groove of mutual wedging and flange nested against one another; Groove and flange that mutually nested cooperation is also arranged between last nowel heals up; Top box heals up and nowel heals up all adopts the macromolecule engineering material to process, and on the eckband arc surface that last nowel heals up, is equipped with oil-return groove, and the eckband arc surface that nowel heals up is provided with spill port; The nowel that is positioned at box inside heals up and also is located at main oil-return groove on the eckband, and the inner of spill port communicates with main oil-return groove.This structure is also comparatively complicated, and need adopt macromolecular materials such as nylon.Owing on the flask joint of casing, also processed drainback passage, increased the cost of machining, and the requirement of flask joint sealing has also been improved.Owing to need on the circumferential surface in gear-box hole, process some grooves, and then run through these grooves and to the hole of gear housing tilt, difficulty of processing is big, and need special frock to process these to run through the hole of groove in the axial processing of groove.
Summary of the invention
The objective of the invention is to: the problem to above-mentioned existing technology exists proposes the reduction gear box that a kind of oil return is satisfactory for result, do not influence sealing effect and good manufacturability.
In order to reach above purpose, reduction gear box of the present invention comprises casing, and the outside of said casing is shaped on the gearwheel axis hole; Said gearwheel axis hole integral body is stepped, and medial aperture is greater than aperture, the outside; Be shaped on the groove of two seals at least that forms the sealing labyrinth with the Large Gear Shaft During counter structure in the said inboard and the outside respectively; Said casing is positioned at bottom, gearwheel hole and forms towards the downward-sloping depression of casing, and the below of gearwheel Kongzui outside seal groove is arrived in the bosom of said depression; The lower of said each seal groove is shaped at least one return port that is communicated with said depression.Obviously this return port is preferably upright opening, promptly perpendicular to the gearwheel axis hole.
Like this, the lubricant oil that flows into seal groove can in time waltz through upright opening and flow to depression, is back in the casing again, can not accumulate in the seal groove.And no matter be tilt depression or upright opening, can not influence the sealing of seal groove.In addition, the depression that tilts can be shaped at casing casting is formed, and the brill system of upright opening need not by frock, can directly drill boom be stretched into the system of boring in the gearwheel axis hole, and is very convenient.
Especially what deserves to be mentioned is; In the process of gear rotation, in fact the inclination depression that casing is positioned at bottom, gearwheel hole has formed a negative pressure cavity, then forms the malleation chamber in the seal groove; Because upright opening has connected malleation chamber and negative cavity; Therefore make that the lubricant oil in the seal groove refluxes rapidly, this not merely is that drainage and the structure with the effect of desirable suction stream not only make backflow very smooth and easy, and has effectively strengthened the sealing of seal groove.This shows that the present invention compared with prior art has outstanding substantive distinguishing features and obvious improvement.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is the reduction gear tank drainback structural representation of existing rail truck traction gear drive unit.
Fig. 2 is that the A of Fig. 1 is to partial view.
Fig. 3 is the structural representation of one embodiment of the invention.
Fig. 4 is that the A of Fig. 3 is to partial view
Fig. 5 is the structural representation after the assembling of Fig. 3 embodiment gearwheel.
Embodiment
Embodiment one
The reduction gear box of present embodiment such as Fig. 3 and shown in Figure 4, the outside of casing 2 is shaped on gearwheel axis hole 3.Gearwheel axis hole integral body is stepped, and medial aperture is greater than aperture, the outside.Be shaped on multiple-sealed groove 5 respectively in the inboard and the outside.As shown in Figure 5, these seal grooves form the sealing labyrinth with Large Gear Shaft During 1 corresponding protruding structure after gearwheel 1 assembling.The bottom that casing 2 is positioned at gearwheel hole 3 forms towards the downward-sloping depression 6 of casing; The lower surface of this depression is the inclined-plane of tilt about 45 ° (can 30-60 ° of scope); Upper surface is carried out the transition to the inclined-plane parallel with lower surface and is constituted by the plane of depression depths, is convenient to boring like this.The below of gearwheel hole 3 outermost seal grooves is arrived in the depression bosom.。The lower of each seal groove is shaped on four upright openings 7 that are communicated with depression 6 respectively.
After the assembling, as shown in Figure 5, the protruding part on the gearwheel 1 inserts the seal groove of casing 2, has only very little gap each other, forms typical labyrinth seal structure.When gearwheel is driven when running, the lubricant oil of box house can produce the trend of slowly outside casing, oozing out, and seal groove plays and stops that lubricant oil is directly to the effect of casing exosmosis.Deposited in seal groove by the lubricant oil that stopped, and waltz through upright opening and flow to depression, be back to again in the casing, can not accumulate in the seal groove.Especially, in the process of gear rotation, because air flows with the gearwheel rotation in the casing; Therefore the casing inclination depression that is positioned at bottom, gearwheel hole becomes the negative pressure cavity, then forms relative malleation chamber in the seal groove, as a result in the seal groove lubricant oil of deposition except deadweight refluxes; In fact inhaled back casing rapidly through upright opening; Compared with prior art, the backflow effect has very significantly effectively strengthened the sealing of seal groove.
During the processing upright opening, gear housing is fixed on the drilling machine, aims at minimum bore position boring and get final product, on common vertical drilling machine, just can accomplish, need not frock.As can beappreciated from fig. 5, owing to be boring, do not destroy the continuity of seal groove, so its sealing effect has obtained practical assurance.
Except that the foregoing description, the present invention can also have other mode of executions.For example, return port is also nonessential to be vertical, and the shape in hole also is not limited to cylindrical hole, and the shape of depression can be revised according to box shape and casting technique.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1. a reduction gear box comprises casing, and the outside of said casing is shaped on the gearwheel axis hole; Said gearwheel axis hole integral body is stepped, and medial aperture is greater than aperture, the outside; Be shaped on the groove of two seals at least that forms the sealing labyrinth with the Large Gear Shaft During counter structure in the said inboard and the outside respectively; It is characterized in that: said casing is positioned at bottom, gearwheel hole and forms towards the downward-sloping depression of casing, and the below of gearwheel Kongzui outside seal groove is arrived in the bosom of said depression; The lower of said each seal groove is shaped at least one return port that is communicated with said depression.
2. reduction gear box according to claim 1 is characterized in that: said return port is perpendicular to the gearwheel axis hole.
3. reduction gear box according to claim 2 is characterized in that: the lower surface of said depression is inclination 30-60 ° inclined-plane.
4. reduction gear box according to claim 3 is characterized in that: the upper surface of said depression is carried out the transition to the inclined-plane parallel with lower surface and is constituted by the plane of depression depths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102258892A CN101705991B (en) | 2009-08-18 | 2009-11-27 | Reduction gear box |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910184314 | 2009-08-18 | ||
| CN200910184314.0 | 2009-08-18 | ||
| CN2009102258892A CN101705991B (en) | 2009-08-18 | 2009-11-27 | Reduction gear box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101705991A CN101705991A (en) | 2010-05-12 |
| CN101705991B true CN101705991B (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102258892A Active CN101705991B (en) | 2009-08-18 | 2009-11-27 | Reduction gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101705991B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009663B (en) * | 2010-12-20 | 2012-07-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gear case sealing structure of urban rail vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1467118A (en) * | 2003-06-03 | 2004-01-14 | 中国南车集团戚墅堰机车车辆工艺研究 | Airproof equipment for power driven gear case of high speed train |
| CN201083264Y (en) * | 2007-07-27 | 2008-07-09 | 南车株洲电力机车有限公司 | Labyrinth combined locomotive power vehicle gear drive system lubricating device |
| CN101251193A (en) * | 2008-04-01 | 2008-08-27 | 无锡金露通用机械有限公司 | Labyrinth type oil seal structure with holes for high speed axis |
| CN101338851A (en) * | 2008-08-06 | 2009-01-07 | 永济新时速电机电器有限责任公司 | Pulling motor for locomotive |
| CN201588744U (en) * | 2009-11-03 | 2010-09-22 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sealing device of wind power generation speed-increasing gearbox |
| CN201739474U (en) * | 2009-08-18 | 2011-02-09 | 常州朗锐东洋传动技术有限公司 | Reduction gearbox |
-
2009
- 2009-11-27 CN CN2009102258892A patent/CN101705991B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1467118A (en) * | 2003-06-03 | 2004-01-14 | 中国南车集团戚墅堰机车车辆工艺研究 | Airproof equipment for power driven gear case of high speed train |
| CN201083264Y (en) * | 2007-07-27 | 2008-07-09 | 南车株洲电力机车有限公司 | Labyrinth combined locomotive power vehicle gear drive system lubricating device |
| CN101251193A (en) * | 2008-04-01 | 2008-08-27 | 无锡金露通用机械有限公司 | Labyrinth type oil seal structure with holes for high speed axis |
| CN101338851A (en) * | 2008-08-06 | 2009-01-07 | 永济新时速电机电器有限责任公司 | Pulling motor for locomotive |
| CN201739474U (en) * | 2009-08-18 | 2011-02-09 | 常州朗锐东洋传动技术有限公司 | Reduction gearbox |
| CN201588744U (en) * | 2009-11-03 | 2010-09-22 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sealing device of wind power generation speed-increasing gearbox |
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| Publication number | Publication date |
|---|---|
| CN101705991A (en) | 2010-05-12 |
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| C14 | Grant of patent or utility model | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 213000 Jiangsu province Changzhou City New District Xue Shun Road No. 19 Patentee after: CHANGZHOU RUIYANG TRANSMISSION TECHNOLOGY Co.,Ltd. Patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213000 Jiangsu province Changzhou City New District Xue Shun Road No. 19 Patentee before: CHANGZHOU RUIYANG TRANSMISSION TECHNOLOGY Co.,Ltd. Patentee before: CSR QISHUYAN INSTITUTE Co.,Ltd. |
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| CP03 | Change of name, title or address |
Address after: No. 19 Xuejia Shunyuan Road, Xinbei District, Changzhou City, Jiangsu Province, 213000 Patentee after: CHANGZHOU RUIYANG TRANSMISSION TECHNOLOGY Co.,Ltd. Country or region after: China Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Address before: No. 19 Xuejia Shunyuan Road, Xinbei District, Changzhou City, Jiangsu Province, 213000 Patentee before: CHANGZHOU RUIYANG TRANSMISSION TECHNOLOGY Co.,Ltd. Country or region before: China Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
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| CP03 | Change of name, title or address |