CN202851614U - Driving gear shaft of gear box - Google Patents
Driving gear shaft of gear box Download PDFInfo
- Publication number
- CN202851614U CN202851614U CN 201220528231 CN201220528231U CN202851614U CN 202851614 U CN202851614 U CN 202851614U CN 201220528231 CN201220528231 CN 201220528231 CN 201220528231 U CN201220528231 U CN 201220528231U CN 202851614 U CN202851614 U CN 202851614U
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- CN
- China
- Prior art keywords
- driving gear
- gear shaft
- shaft
- oil
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a driving gear shaft of a gear box. In order to solve the problem that a driving gear shaft and a coupling are relaxed and a coordinating surface is scratched when the coupling is disassembled as the gear box of current urban rail transit vehicle works. An oil filler hole is arranged on a shaft end face of the driving gear shaft of the gear box. An oil gallery communicated with the oil filler hole is arranged on an external circular surface of the driving gear shaft. A spiral oil groove is arranged on the external circular surface of the driving gear shaft and is communicated with the oil gallery. According to the driving gear shaft of the gear box provided by the utility model, the spiral oil groove is machined at the coordinated part of the gear shaft and the coupling, so that the press fitting quality of the coupling is greatly improved, the problem that the driving gear shaft and the coupling are relaxed is solved, and meanwhile, the coordinating surface is not scratched when the coupling is disassembled.
Description
Technical field
The utility model relates to a kind of gear-box driving gear shaft finishing bathtray design field, is specially a kind of gear-box driving gear shaft.
Background technique
As shown in Figure 1, on urban rail transit vehicles, input torque is delivered on the driving gear shaft 3 by shaft coupling 4, is delivered on the axletree 5 by gear-box 2 again, rotates the operation that realizes vehicle thereby wheel 1 is subject to the reaction force of track.As shown in Figure 2, what the driving gear shaft of gear-box 23 and shaft coupling 4 extensively adopted is interference fit, produces necessary interference and realizes connecting by the tapering fitting surface that is connected with axial position, is used for transmitting torque.
The assembly method of interference fit joint adopts plunging, when mounting or dismounting shaft coupling on driving gear shaft, need to inject high pressure oil toward between matching surface, in order to the internal diameter of swell external member (shaft coupling 4), dwindle the external diameter of internal member (driving gear shaft 3), reduce the scratch of fitting surface.Need to make oil duct 6 and oil hole 7 at driving gear shaft 3 when as shown in Figure 2, adopting this correction oil injection method.
At present, oil duct 6 on urban rail transit vehicles gear-box 2 driving gear shafts 3 and oil hole 7 are as shown in Figure 2, when installation and removal shaft coupling 4, high pressure oil enters into oil duct 6 by oil hole 7, is entered between the fitting surface of driving gear shaft 3 and shaft coupling 4 by oil duct 6 again.Adopt this oil channel structures, because oil duct 6 only has a circle, on fitting surface, this structure can cause near oil duct 6 oil pressure to be lower than all the other regional oil pressure when shaft coupling 4 mounting or dismounting, causes whole fitting surface upward pressure skewness.The shaft coupling 4 that is assembled on the driving gear shaft 3 slow phenomenon may occur when transmitted load, also may be because the uneven matching surface that scratches of pressure when dismounting shaft coupling 4.
Therefore, pressure distribution inequality between fitting surface may appear in oil duct and the oil hole structure on the gear-box driving gear shaft when shaft coupling press-fits and dismantle at present, relaxes in the time of can causing shaft coupling work, scratches matching surface during the mounting or dismounting shaft coupling.
The model utility content
For oil duct and the oilhole that overcomes on the existing urban rail transit vehicles gear-box driving gear shaft all adopted said structure, the deficiency of special oil groove is not set for the pressure distribution uneven phenomenon that may occur, the utility model aims to provide a kind of gear-box driving gear shaft, by adding helical oil groove at driving gear shaft, pressure when realizing the mounting or dismounting shaft coupling between fitting surface evenly distributes, and avoids the generation of the problems referred to above.
To achieve these goals, the technological scheme that adopts of the utility model is:
A kind of gear-box driving gear shaft comprises the driving gear shaft that is connected with the shaft coupling interference fit, and the axial end of described driving gear shaft has oil hole, has the oil duct that is communicated with described oil hole on the periphery of this driving gear shaft; Its structural feature is, has helical oil groove on described driving gear shaft and the periphery that shaft coupling cooperates, and this helical oil groove is communicated with described oil duct.
Below be the technological scheme of further improvement of the utility model:
Further, enter equably between the fitting surface of driving gear shaft and shaft coupling in order to guarantee oil, described helical oil groove equidistantly and continuously is looped around on the periphery of driving gear shaft.
According to embodiment of the present utility model, described helical oil groove offer length less than the length of described driving gear shaft with the shaft coupling section of cooperation.
The sectional shape of described helical oil groove is U-shaped, inverted trapezoidal or V-arrangement, can certainly be other sectional shape.
The pitch of described helical oil groove is 1/3 of shaft coupling and driving gear shaft length of thread engagement, if pitch is too large, processing technology is complicated, and be unfavorable for the even distribution of lubricant oil, pitch is too little, the area of contact of driving gear shaft and shaft coupling can reduce, and causes the magnitude of interference of the two to reduce, and slow phenomenon may occur at work.
The groove depth of described helical oil groove is preferably 0.3mm ~ 0.5mm, and the wide 0.8mm ~ 1mm of slot cross-section is mainly excessive for fear of oil groove and cross dark and reduce the intensity of driving gear shaft.
By said structure, the utility model makes the high pressure oil that enters into 6 li of oil ducts enter between the fitting surface of driving gear shaft 3 and shaft coupling 4 along two passes: one, directly to enter between contact surface by oil duct 6 by at driving gear shaft 3 surfaces processing helical oil groove 8; Two, enter helical oil groove 8 by oil duct 6, entered between contact surface by helical oil groove 8 again.As shown in Figure 3 and since helical oil groove 8 the outer surface equal intervals of driving gear shaft 3 around, and continuously (as shown in Figure 4), so that oil inlet passage distributes at whole fitting surface is average, thereby distribute also can be more even for the oil pressure between fitting surface.
Compared with prior art, the beneficial effects of the utility model are: the utility model is under the prerequisite that does not affect driving gear structural design of shaft and Functional Design, after driving gear shaft machines, on gear shaft, process described helical oil groove with the matching part of shaft coupling, greatly improved the quality that press-fits of shaft coupling, the problem of relaxing of having avoided shaft coupling and driving gear between centers to occur is guaranteed between fitting surface without scratching when the dismounting shaft coupling simultaneously.
Below in conjunction with drawings and Examples the utility model is further elaborated.
Description of drawings
Fig. 1 is existing urban rail transit vehicles driving gear shaft, shaft coupling fundamental diagram;
Fig. 2 is oil hole, oil duct structure figure on the existing driving gear shaft;
Fig. 3 is an embodiment's of the utility model structure principle chart;
Fig. 4 is the Ι partial enlarged drawing of Fig. 3.
In the drawings
The 1-wheel; The 2-gear-box; The 3-driving gear shaft; The 4-shaft coupling;
The 5-axletree; 6-oil duct 7-oil hole 8-helical oil groove.
Embodiment
A kind of gear-box driving gear shaft as shown in Figure 3, comprises the driving gear shaft 3 that is connected with shaft coupling 4 interference fit; The outer round surface of described driving gear shaft 3 is provided with the helical oil groove 8 that the cross section is U-shaped, and as shown in Figure 2, the outer round surface of this driving gear shaft 3 is used for cooperating with shaft coupling 4 internal surfaces.As shown in Figure 3, helical oil groove 8 and oil duct 6 UNICOMs axially are being equidistant distribution.As shown in Figure 4, helical oil groove 8 is continuous on the surface of driving gear shaft 3, concentrates for avoiding sharp corner stress, and helical oil groove 8 carries out chamfered.
The pitch of described helical oil groove 8 is shaft coupling 4 and 1/3 of driving gear shaft length of thread engagement, because pitch is too large, processing technology is complicated, and be unfavorable for the even distribution of lubricant oil, pitch is too little, the area of contact of driving gear shaft and shaft coupling 4 can reduce, and causes the magnitude of interference of the two to reduce, and slow phenomenon may occur at work.
The groove depth of described helical oil groove 8 is 0.4mm, and the wide 0.9mm of slot cross-section can avoid the excessive intensity with excessively deeply reducing driving gear shaft of oil groove
Such as Fig. 3, after high pressure oil enters oil duct 6 by oil hole 7, can enter between the fitting surface of driving gear shaft 3 and shaft coupling 4 along two passes: one, directly enter between fitting surface along oil duct 6; Two, owing to helical oil groove 8 and oil duct 6 UNICOMs, high pressure oil can enter between fitting surface along helical oil groove 8.Helical oil groove 8 equidistantly distributes continuously on driving gear shaft 3 surface, so that the high pressure oil between fitting surface is evenly distributed during mounting or dismounting shaft coupling 4, has just realized that also the pressure distribution between fitting surface is average.
The content that above-described embodiment is illustrated should be understood to these embodiments and only is used for being illustrated more clearly in the utility model, and be not used in the restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
Claims (6)
1. gear-box driving gear shaft, comprise the driving gear shaft (3) that is connected with shaft coupling (4) interference fit, the axial end of described driving gear shaft (3) has oil hole (7), has the oil duct (6) that is communicated with described oil hole (7) on the periphery of this driving gear shaft (3); It is characterized in that have helical oil groove (8) on described driving gear shaft (3) and the periphery that shaft coupling (4) cooperates, this helical oil groove (8) is communicated with described oil duct (6).
2. gear-box driving gear shaft according to claim 1 is characterized in that, described helical oil groove (8) equidistantly and continuously is looped around on the periphery of driving gear shaft (3).
3. gear-box driving gear shaft according to claim 1 is characterized in that, described helical oil groove (8) offer length less than the length of described driving gear shaft (3) with shaft coupling (4) section of cooperation.
4. gear-box driving gear shaft according to claim 1 is characterized in that, the sectional shape of described helical oil groove (8) is U-shaped, inverted trapezoidal or V-arrangement.
5. gear-box driving gear shaft according to claim 1 is characterized in that, the pitch of described helical oil groove (8) is shaft coupling (4) and 1/3 of driving gear shaft (3) length of thread engagement.
6. gear-box driving gear shaft according to claim 1 is characterized in that, the groove depth of described helical oil groove (8) is 0.3mm ~ 0.5mm, the wide 0.8mm ~ 1mm of slot cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528231 CN202851614U (en) | 2012-10-16 | 2012-10-16 | Driving gear shaft of gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528231 CN202851614U (en) | 2012-10-16 | 2012-10-16 | Driving gear shaft of gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202851614U true CN202851614U (en) | 2013-04-03 |
Family
ID=47982820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220528231 Expired - Lifetime CN202851614U (en) | 2012-10-16 | 2012-10-16 | Driving gear shaft of gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202851614U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852959A (en) * | 2012-10-16 | 2013-01-02 | 南车株洲电力机车有限公司 | Driving gear shaft for gearbox |
| CN103335012A (en) * | 2013-07-05 | 2013-10-02 | 重庆大学 | Sun gear shaft of wind power gear box |
-
2012
- 2012-10-16 CN CN 201220528231 patent/CN202851614U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852959A (en) * | 2012-10-16 | 2013-01-02 | 南车株洲电力机车有限公司 | Driving gear shaft for gearbox |
| CN103335012A (en) * | 2013-07-05 | 2013-10-02 | 重庆大学 | Sun gear shaft of wind power gear box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |