CN111998057A - Integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure - Google Patents
Integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure Download PDFInfo
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- CN111998057A CN111998057A CN202010795655.8A CN202010795655A CN111998057A CN 111998057 A CN111998057 A CN 111998057A CN 202010795655 A CN202010795655 A CN 202010795655A CN 111998057 A CN111998057 A CN 111998057A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 145
- 238000007789 sealing Methods 0.000 title claims abstract description 104
- 238000009826 distribution Methods 0.000 title claims abstract description 99
- 238000013461 design Methods 0.000 title claims abstract description 31
- 239000003921 oil Substances 0.000 claims abstract description 308
- 239000010687 lubricating oil Substances 0.000 claims abstract description 127
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 230000001050 lubricating effect Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to the field of planetary two-gear transmissions with high rotating speed and high power density, and particularly discloses a two-way oil distribution, sealing and supporting structure for a rotating shaft of an integrally designed high-rotating-speed transmission, which integrates two-way oil distribution of lubricating oil and control oil, dynamic sealing and static sealing of an oil distribution oil circuit, radial supporting and axial positioning of a transmission rotating shaft and sealing design of a shaft end of the transmission rotating shaft; furthermore, the radial working sizes of the oil seal, the bearing and the sealing ring are structurally reduced, and meanwhile, the leakage rate of lubricating oil and control oil distribution is small, so that the transmission rotating shaft can run at a high rotating speed, and the shaft end sealing reliability of the transmission rotating shaft under the working conditions of high rotating speed and high load is ensured.
Description
Technical Field
The invention is applied to the field of planetary two-gear transmissions with high rotating speed and high power density, and particularly relates to a rotating shaft two-way oil distribution, sealing and supporting structure of a high-rotating-speed transmission, which is designed in an integrated manner.
Background
Compared with the traditional speed changer, the high-rotating-speed power density speed changer has the advantages of large transmission power, small overall dimension, light weight, compact structure, convenience for integrated arrangement with a power system and the like, so that the high-rotating-speed power density speed changer is an important direction for the development of vehicle speed changers, and particularly has important application in the field of electric driving device of electric driving systems.
For a high-speed and high-power density transmission, the design of supporting, oil distributing and sealing of a transmission rotating shaft is an important key technology. For a high-speed and high-power density transmission, the performance of a support bearing and a sealing element of a transmission rotating shaft is required to be higher; the mounting surface of a supporting bearing of the transmission rotating shaft and the working surface of the sealing element are required to have the smallest radial dimension; meanwhile, the transmission rotating shaft bearing and the sealing structure are required to integrate the functions of oil distribution and axial positioning, namely, the structure integration design is carried out on the oil distribution, sealing and supporting of the transmission rotating shaft so as to realize the compact layout and the miniaturization of the overall dimension of the whole machine.
The oil distribution, sealing and supporting structure of the existing transmission rotating shaft is shown in figure 1 and mainly comprises a box body end cover, a bearing, a transmission rotating shaft, an oil seal, an oil distribution ring, a baffle bearing, a baffle, a lubricating oil channel, an oil channel and the like. The oil distribution, sealing and supporting structure of the existing transmission rotating shaft distributes lubricating oil to the transmission rotating shaft through a box lubricating oil channel, a flow channel between a baffle and a box, an oil distribution ring and an oil channel on the transmission rotating shaft, thereby providing a lubricating oil source for each transmission part on the transmission rotating shaft; the sealing between the transmission rotating shaft and the outside is realized through an oil seal; the support and the one-way axial limit of the transmission rotating shaft are realized through the bearing.
The oil distribution, sealing and supporting structure of the existing transmission rotating shaft has the following defects: 1. in the existing structure, as shown in fig. 1, the leakage amount of a lubricating oil path at a baffle bearing is large, and the lubricating oil distribution efficiency is low; 2. the existing structure does not have the oil distribution capability of control oil and can not provide control pressure oil for a clutch on a transmission rotating shaft; 3. the oil seal at the shaft extension end of the transmission rotating shaft has insufficient sealing reliability, and the oil leakage phenomenon exists under the long-time large-load working condition; 4. the existing structure can only realize one-way axial limiting on the transmission rotating shaft, needs to simultaneously perform axial limiting on the shaft end on the other side of the transmission rotating shaft, has higher tolerance requirements on the sizes of all parts in an axial installation size chain, needs to provide an axial clearance adjusting structure for a transmission shaft, needs to measure and adjust the axial clearance in an assembly mode, and is poor in processing and assembling manufacturability.
Disclosure of Invention
The invention aims to: the utility model provides an integrate design high rotational speed derailleur pivot double-circuit and join in marriage oily and sealing, bearing structure, solved the lubricating oil leakage volume of current derailleur pivot big, lubricated oil-distributing efficiency is lower, axle head seal reliability subalternation technical problem.
The invention provides an integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure, which is structurally characterized in that: the oil seal structure is composed of a box body end cover, a bolt, an oil seal seat, a bearing, an oil baffle disc, a clamping ring, a transmission rotating shaft, an oil seal, a baffle ring, a sealing gasket, an O-shaped ring a, an O-shaped ring b, a bearing seat, a sealing ring, an oil distribution sleeve, an O-shaped ring c, a stud, a nut and a stop gasket, wherein the O-shaped ring, the clamping ring, the bearing, the oil seal, the bolt, the stud and the nut can be selected to use standard components.
The oil seal seat and the bearing seat are arranged on the end cover of the box body; the end cover of the box body is provided with a two-stage step-shaped inner hole, namely an inner hole a and an inner hole b, and a lubricating oil passage and an operating oil passage; the bearing seat is processed with two step-shaped excircles, namely an excircle a and an excircle b, and is processed with an end face, an oil return hole, an inner hole and a small lubricating oil hole, the excircle a is processed with a lubricating oil hole and an O-shaped ring groove a, and the excircle b is processed with an operating oil hole; an O-shaped ring groove b is machined in the end face, the O-shaped ring groove a and the O-shaped ring groove b are respectively provided with an O-shaped ring a and an O-shaped ring b, and the two O-shaped rings are simultaneously attached to the end cover of the box body; a crescent groove a and a crescent groove b are machined on the inner hole, the crescent groove a is communicated with the lubricating oil hole, and the crescent groove b is communicated with the control oil hole; the small lubricating oil hole is communicated with the lubricating oil hole. The excircle a of the bearing seat is matched with the inner hole a of the end cover of the box body, and the excircle b and the inner hole b of the end cover of the box body are provided with a gap. The transmission rotating shaft is provided with a clamping ring, an oil baffle disc, a baffle ring and an oil distribution sleeve; the oil distribution sleeve is provided with a ring groove a, a ring groove b, an O-shaped ring groove, an inner circle and a sealing ring groove, wherein the sealing ring grooves are divided from the ring groove a to the ring groove b, a lubricating oil hole c is formed in the ring groove a, an operating oil hole a is formed in the ring groove b, an operating oil hole b is formed in the side wall of the oil distribution sleeve, and the operating oil hole b is communicated with the operating oil hole a; an inner spline is arranged on the inner circle of the oil distribution sleeve, the tooth root of the inner spline is staggered with the O-shaped ring groove, and a sealing ring is arranged on the sealing ring groove and is simultaneously attached to the inner hole of the bearing seat; the bearing outer ring is arranged on the bearing seat, and the bearing inner ring is arranged on the transmission rotating shaft; an oil return groove is processed on the oil seal seat; a clamping ring groove, a lubricating oil hole a and a lubricating oil hole b are machined in the transmission rotating shaft; the lubricating oil hole a is communicated with the lubricating oil hole b.
The lubricating oil hole and the control oil hole of the bearing seat are communicated with a lubricating oil channel and a control oil channel of an end cover of a box body; the ring groove a and the ring groove b of the oil distribution sleeve are respectively communicated with the crescent groove a and the crescent groove b of the bearing seat. The bearing inner ring is arranged on the transmission rotating shaft, and the two sides of the bearing inner ring are limited by the clamping ring, the oil baffle disc and the check ring. The oil seal is arranged on the oil seal seat, and the oil seal lip is attached to the transmission rotating shaft.
The working principle of the invention is as follows: lubricating oil flows from a lubricating oil passage of the end cover of the box body, through a lubricating oil hole of the bearing seat, the crescent groove a, the lubricating oil hole a of the oil distribution lantern ring, the lubricating oil hole c, the lubricating oil hole a of the transmission rotating shaft and the lubricating oil hole b of the transmission rotating shaft in a distribution manner, so that all parts on the transmission rotating shaft are lubricated; the operating oil is distributed to the operating oil hole b of the oil distribution sleeve through the oil distribution sleeve ring groove b and the operating oil hole a from the operating oil passage of the end cover of the box body, the operating oil hole and the crescent groove through the bearing block, so that an operating oil source is provided for the gear shifting clutch on the transmission rotating shaft; meanwhile, through the matching of the O-shaped rings a and b, the inner hole a of the box body end cover and the excircle a of the bearing seat, the static sealing of lubricating oil and control oil between the bearing seat and the box body end cover is realized, and the design of the stepped inner hole a and the stepped inner hole b of the box body end cover can effectively avoid the O-shaped rings a from being damaged in the assembling process; the dynamic sealing of the lubricating oil and the operating oil between the bearing seat and the oil distribution sleeve is realized through the sealing ring; the bearing outer ring is arranged on the bearing seat, the two sides of the bearing outer ring are axially limited by the oil seal seat and the bearing seat, and the two sides of the bearing inner ring are axially fixed by the snap ring, the oil baffle disc and the pressure plate through arranging the bearing inner ring on the transmission rotating shaft, so that the radial support and the axial positioning of the transmission rotating shaft are realized; the shaft extension end of the transmission rotating shaft is sealed through an oil seal; simultaneously, the oil baffle disc is additionally arranged, an oil return groove is processed on the oil seal seat, an oil return hole is processed on the bearing seat, and the sealing reliability of the oil seal is ensured.
Compared with the prior art, the invention has the following advantages: the oil distribution device integrates the dynamic sealing and static sealing of two paths of lubricating oil and control oil, the axial end radial support and axial positioning of an oil distribution oil path and the sealing design of a transmission rotating shaft, and has the advantages of compact structure, convenience in overall layout of the transmission and effective reduction of the overall external dimension and weight of the transmission; meanwhile, the radial working sizes of the oil seal, the bearing and the sealing ring are structurally reduced, so that the transmission rotating shaft can run at a high rotating speed; under the working conditions of high rotating speed and high load, the shaft end of the transmission rotating shaft is reliably sealed. Furthermore, the invention has good manufacturability and is convenient for processing, dismounting and maintenance. In the invention, the leakage rate of the lubricating oil and the control oil is small.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention designs the two-way oil distribution, sealing and supporting structure of the rotating shaft of the high-speed transmission in an integrated manner, adopts the design concept of part-level functional structure integration, integrates the dynamic sealing and static sealing of two-way oil distribution and distribution oil ways of lubricating oil and control oil, radial supporting and axial positioning of the shaft end and the sealing design of the rotating shaft, and has the advantages of compact structure, convenience in integral layout of the transmission and effective reduction of the overall external dimension and weight of the transmission;
2. the invention designs the two-way oil distribution, sealing and supporting structure of the rotating shaft of the high-rotating-speed transmission in an integrated manner, structurally reduces the radial working dimensions of an oil seal, a bearing and a sealing ring, and structurally ensures that the transmission rotating shaft has high-rotating-speed operation adaptability;
3. the invention designs the two-way oil distribution, sealing and supporting structure of the rotating shaft of the high-speed transmission in an integrated manner, and the shaft end sealing of the transmission rotating shaft is still reliable even under the working conditions of high rotating speed and high load;
4. the invention designs the two-way oil distribution, sealing and supporting structure of the rotating shaft of the high-speed transmission in an integrated manner, has good manufacturability and is convenient for processing, dismounting and maintenance;
5. the invention designs the two-way oil distribution, sealing and supporting structure of the rotating shaft of the high-speed transmission in an integrated manner, and the leakage rate of lubricating oil and control oil distribution is small;
6. the invention designs a high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure in an integrated manner, the two sides of the outer ring of a bearing are axially limited by an outer ring limiting and supporting assembly, the inner ring of the bearing is arranged on a transmission rotating shaft, and the two sides of the inner ring of the bearing are axially fixed by an inner ring fixing assembly, so that the support and the axial positioning of the transmission rotating shaft are realized.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the embodiment will be briefly described below, and it should be understood that the proportional relationship of each component in the drawings in this specification does not represent the proportional relationship in the actual material selection design, and is only a schematic diagram of the structure or the position, in which:
FIG. 1 is a schematic diagram of a prior art configuration;
FIG. 2 is a schematic diagram of the present invention;
FIG. 3 is a schematic structural view of a case end cap;
FIG. 4 is a schematic structural diagram of an oil seal seat;
FIG. 5 is a schematic structural view of a transmission rotating shaft;
FIG. 6 is a schematic view of the bearing seat;
FIG. 7 is a schematic structural view of an oil distribution sleeve;
FIG. 8 is a schematic view in the direction B of FIG. 4;
fig. 9 is a cross-sectional view a-a of fig. 6.
Reference numerals in the drawings indicate:
1A-a box end cover, 2A-a bearing, 3A-a transmission rotating shaft, 4A-an oil seal, 5A-an oil distribution ring, 6A-a baffle bearing, 7A-a baffle, 11A-a lubricating oil channel and 31A-an oil channel;
1-bolt, 2-box end cover, 3-oil seal seat, 4-bearing, 5-oil baffle disc and 6-snap ring;
7-transmission rotating shaft, 71-snap ring groove, 72-lubricating oil hole a, 73-lubricating oil hole b;
8-oil seal, 9-baffle ring, 10-sealing gasket, 11-O-shaped ring a, 12-O-shaped ring b;
13-bearing seat, 131-excircle a, 1311-lubricating oil hole, 1312-O-ring groove a, 132-end face, 1321-O-ring groove b, 133-oil return hole, 134-inner hole, 1341-crescent groove a, 1342-crescent groove b, 135-excircle b, 1351-control oil hole and 136-small lubricating oil hole;
14-a sealing ring;
15-oil distribution sleeve, 151-ring groove a, 1511-lubricating oil hole c, 152-ring groove b, 1521-operating oil hole a, 153-O-shaped ring groove, 1531-operating oil hole b, 154-inner circle, 1541-internal spline and 155-sealing ring groove;
16-O-shaped ring c, 17-double-end stud, 18-nut, 19-stop gasket, 21-inner hole a, 22-lubricating oil channel, 23-inner hole b, 24-operating oil channel and 31-oil return groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will be described in detail with reference to fig. 1 to 9.
Example 1
As shown in fig. 1 to 9, the integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure of the invention comprises a box end cover 1, a bolt 2, an oil seal seat 3, a bearing 4, an oil baffle disc 5, a snap ring 6, a transmission rotating shaft 7, an oil seal 8, a baffle ring 9, a sealing gasket 10, an O-shaped ring a11, an O-shaped ring b12, a bearing seat 13, a sealing ring 14, an oil distribution sleeve 15, an O-shaped ring c16, a stud 17, a nut 18 and a stop gasket 19. Wherein the bearing 4, the clamping ring 6, the oil seal 8, the O-ring a11, the O-ring b12, the O-ring c16, the stud 17, the nut 18 and the stop washer 19 can be standard components.
The box end cover 2 is processed with two inner holes in a step shape, namely an inner hole a21 and an inner hole b23, and is processed with a lubricating oil passage 22 and a control oil passage 24.
The bearing seat 13 is processed with two stepped excircles, namely an excircle a131 and an excircle b135, and is processed with an end face 132, an oil return hole 133, an inner hole 134 and a small lubricating oil hole 136; the outer circle a131 is provided with a lubricating oil hole 1311 and an O-shaped ring groove a1312 in a machining mode; the excircle b135 is processed with a control oil hole 1351; the end surface 132 is provided with an O-shaped ring groove b 1321; a crescent groove a1341 and a crescent groove b1342 are machined in the inner hole 134, the crescent groove a1341 is communicated with the lubricating oil hole 1311, and the crescent groove b1342 is communicated with the control oil hole 1351; the small oil hole 136 is communicated with the oil hole 1311.
The excircle a131 of the bearing seat 13 is matched with the inner hole a21 of the box body end cover 2, and a gap is reserved between the excircle b135 and the inner hole b23 of the box body end cover 2.
The oil distribution sleeve 15 is provided with an annular groove a151, an annular groove b152, an O-shaped ring groove 153, an inner circle 154 and a sealing annular groove 155; a lubricating oil hole c1511 is machined in the ring groove a 151; an operating oil hole a1521 is machined in the ring groove b 152; an operating oil hole b1531 is formed in the O-shaped ring groove 153, and the operating oil hole b1531 is communicated with the operating oil hole a 1521; the inner circle 154 has an internal spline 1541, the root of the internal spline 1541 being offset from the O-ring groove 153.
An oil return groove 31 is processed on the oil seal seat 3.
The transmission rotating shaft 7 is provided with a clamping ring groove 71, a lubricating oil hole a72 and a lubricating oil hole b73, wherein the lubricating oil hole a72 is communicated with the lubricating oil hole b 73.
In the invention, an oil seal seat 3 and a bearing seat 13 are arranged on a box body end cover 2; o-rings a11 and b12 are respectively arranged at the O-ring groove a1312 and the O-ring groove b1321 of the bearing seat 13, and the two O-rings are simultaneously attached to the box body end cover 2; the lubricating oil hole 1311 and the control oil hole 1351 of the bearing seat 13 are respectively communicated with the lubricating oil passage 22 and the control oil passage 24 of the box end cover 2. The transmission rotating shaft 7 is provided with a clamping ring 6, an oil baffle disc 5, a baffle ring 9 and an oil distribution sleeve 15, wherein a sealing ring groove 155 of the oil distribution sleeve 15 is provided with a sealing ring 14, and the sealing ring 14 is simultaneously attached to an inner hole 134 of a bearing block 13; the annular grooves a151 and b152 of the oil distribution sleeve 15 are respectively communicated with the crescent grooves a1341 and b1342 of the bearing seat 13. The bearing 4 outer ring is installed in bearing frame 13, and bearing 4 outer ring both sides are injectd by oil seal seat 3, bearing frame 13, and the bearing 4 inner circle is installed in transmission rotating shaft 7, and bearing 4 inner circle both sides are injectd by snap ring 6, oil baffle disc 5, retaining ring 9. The oil seal 8 is arranged on the oil seal seat 3, and the sealing lip of the oil seal 8 is attached to the transmission rotating shaft 7.
The main effects of the invention are realized at the same time: firstly, lubricating oil and operating oil are respectively distributed and flowed to a transmission rotating shaft 7 and an oil distribution sleeve 15 from a box body end cover 2; secondly, supporting and axially positioning the transmission rotating shaft 7; thirdly, a lubricating oil path and an operating oil path are sealed between the bearing block 13 and the box body end cover 2, and static sealing is realized; fourthly, sealing a lubricating oil path and an operating oil path between the bearing block 13 and the oil distribution sleeve 15, wherein the sealing is dynamic sealing; and sixthly, sealing the shaft extending end of the transmission rotating shaft 7.
The working principle of the invention is as follows:
lubricating oil sequentially passes through a lubricating oil hole 1311, a crescent groove a1341, a ring groove a151 of an oil distribution sleeve 15, a lubricating oil hole c1511 and a lubricating oil hole a72 of a transmission rotating shaft 7 from a lubricating oil channel 22 of a box body end cover 2 and then is distributed to a lubricating oil hole b73 of the transmission rotating shaft 7, so that all parts on the transmission rotating shaft 7 are lubricated;
the operating oil flows to an operating oil hole b1531 of the oil distribution sleeve 15 after sequentially passing through an operating oil hole 1351, a crescent slot 1342, an oil distribution sleeve 15 ring slot b152 and an operating oil hole a1521 of the bearing block 13 from an operating oil passage 24 of the box body end cover 2, so that an operating oil source is provided for a gear shifting clutch on the transmission rotating shaft 7;
according to the invention, through the matching of the O-shaped ring a11, the O-shaped ring b12, the inner hole a21 of the box body end cover 2 and the excircle a131 of the bearing seat 13, the static sealing of lubricating oil and operating oil between the bearing seat 13 and the box body end cover 2 is realized, wherein the stepped inner hole a21 and the inner hole b23 of the box body end cover 2 are designed, so that the O-shaped ring a11 can be effectively prevented from being damaged in the assembling process; meanwhile, the dynamic sealing of lubricating oil and control oil between the bearing seat 13 and the oil distribution sleeve 15 is realized through the sealing ring 14;
the outer ring of the bearing 4 is arranged on the bearing seat 13, the two sides of the outer ring of the bearing 4 are axially limited by the oil seal seat 3 and the bearing seat 13, the inner ring of the bearing 4 is arranged on the transmission rotating shaft 7, and the two sides of the inner ring of the bearing 4 are axially fixed by the clamping ring 6, the oil baffle disc 5 and the pressing plate 9, so that the support and the axial positioning of the transmission rotating shaft 7 are realized;
the shaft extension end of the transmission rotating shaft 7 is sealed through an oil seal 8; meanwhile, by additionally arranging the oil baffle disc 5, the oil return groove 31 is processed on the oil seal seat 3, and the oil return hole 133 is processed on the bearing seat 13, so that the sealing reliability of the oil seal 8 is ensured.
In summary, the invention has the following beneficial effects:
the invention adopts the design concept of part-level functional structure integration, integrates the dynamic sealing and static sealing of two paths of oil distribution of lubricating oil and control oil, the radial support and axial positioning of a shaft end and the sealing design of a transmission rotating shaft, and has the advantages of compact structure, convenience for the overall layout of a transmission and effective reduction of the overall dimension and weight of the transmission;
II, the radial working sizes of the oil seal, the bearing and the sealing ring are structurally reduced, and the transmission rotating shaft has high rotating speed operation adaptability structurally;
III, even under the working conditions of high rotating speed and high load, the shaft end of the transmission rotating shaft is still reliably sealed;
IV, the invention has good manufacturability and is convenient for processing, dismounting and maintenance;
v, the leakage rate of the lubricating oil and the control oil is small.
Example 2
The invention designs a two-way oil distribution, sealing and supporting structure of a rotating shaft of a high-rotating-speed transmission in an integrated manner, which comprises a transmission rotating shaft 7, a sealing supporting assembly for supporting the transmission rotating shaft 7 through a bearing 4, an oil distribution channel and an inner sealing assembly for preventing oil in the oil distribution channel from leaking, wherein the sealing supporting assembly comprises an inner ring fixing assembly, an outer ring limiting supporting assembly and an oil seal 8, wherein the inner ring fixing assembly is sleeved on the transmission rotating shaft 7 and used for axially limiting an inner ring of the bearing 4, the outer ring limiting supporting assembly is used for supporting and axially limiting an outer ring of the bearing 4, and the oil seal 8 is used for sealing a shaft extension end;
the oil distribution channel comprises a lubricating oil channel for lubricating the transmission and an operating oil channel for gear shifting operation of the transmission;
an oil distribution sleeve 15 sleeved on the transmission rotating shaft 7 is arranged between the outer ring limiting and supporting assembly and the transmission rotating shaft 7 and positioned on the right side of the bearing 4, the lubricating oil channel sequentially passes through the outer ring limiting and supporting assembly and the oil distribution sleeve 15 and then enters a lubricating hole channel in the transmission rotating shaft 7, and a small lubricating oil hole 136 communicating the lubricating oil channel with a bearing mounting hole in the outer ring limiting and supporting assembly for mounting the bearing 4 is formed in the outer ring limiting and supporting assembly;
the control oil channel sequentially passes through the outer ring limiting support assembly and the oil distribution sleeve 15 and then enters the controlled end; the inner sealing assembly enables lubricating oil of the lubricating oil channel to flow only in the lubricating oil channel, and enables operating oil of the operating oil channel to flow only in the operating oil channel.
According to the invention, the two sides of the outer ring of the bearing are axially limited by the outer ring limiting and supporting assembly, the inner ring of the bearing is arranged on the transmission rotating shaft, and the two sides of the inner ring of the bearing are axially fixed by the inner ring fixing assembly, so that the supporting and the positioning in the axial directions of the transmission rotating shaft are realized, and the assembly manufacturability of the bearing is improved; meanwhile, the shaft extension end of the transmission rotating shaft is sealed through the oil seal, so that the sealing reliability of the shaft extension end of the rotating shaft is ensured; further, by arranging the lubricating oil channel in the outer ring limit support assembly and communicating the lubricating oil channel with the bearing mounting hole for mounting the bearing 4 on the outer ring limit support assembly through the small lubricating oil hole 136, the leakage amount of lubricating oil distribution is reduced, and the lubrication of the bearing 4 is realized; most importantly, the structure of the invention is provided with an operation oil channel, so that the sealing support structure of the rotating shaft of the high-speed transmission integrates two oil paths: the control oil channel and the lubricating oil channel have the function of lubricating parts on the transmission rotating shaft and can provide a control oil source for the gear shifting clutch on the transmission rotating shaft.
Example 3
This embodiment explains a concrete structure of the outer ring limit support assembly in embodiment 2.
As shown in fig. 2, the specific implementation structure of the outer ring limit support assembly is as follows: the outer ring limiting and supporting assembly comprises a bearing seat 13, a box body end cover 2 sleeved on the bearing seat 13 and an oil seal seat 3 sleeved on the transmission rotating shaft 7 and positioned on the left side of the bearing seat 13, the bearing 4 is installed in a bearing installation hole at the left end of the inner side of the bearing seat 13, the inner ring and the outer ring of the bearing 4 are respectively installed on the transmission rotating shaft 7 and the bearing seat 13, and the left side and the right side of the outer ring of the bearing are respectively contacted with the oil seal seat 3 and the end face of the bearing seat installation hole; the left side and the right side of the box body end cover 2 are fixedly connected with the oil seal seat 3 and the bearing seat 13 through a fastener A and a fastener B respectively;
the oil distribution sleeve 15 is positioned between the bearing block 13 and the transmission rotating shaft 7, the lubricating oil channel sequentially passes through the box body end cover 2, the bearing block 13 and the oil distribution sleeve 15 and then enters a lubricating hole channel in the transmission rotating shaft 7, and the bearing block 13 is provided with a small lubricating oil hole 136 for communicating the lubricating oil channel with the bearing mounting hole; the operating oil channel sequentially passes through the box body end cover 2, the bearing block 13 and the oil distribution sleeve 15 and then enters the operated end;
and the inner ring and the outer ring of the oil seal 8 are respectively attached to the transmission rotating shaft 7 and the wall of an oil seal mounting hole in the oil seal seat 3.
Furthermore, the fastener B1 is a bolt, the tail end of the rod part of the bolt penetrates through the oil seal seat 3 and then is in threaded connection with the box body end cover 2, and the head part of the bolt is tightly propped against the oil seal seat 3;
the fastener A comprises a stud 17, a nut 18 and a stop washer 19, one end of the stud 17 penetrates through the bearing seat 13 and then is in threaded connection with the box body end cover 2, and the other end of the stud 17 penetrates through the stop washer 19 and then is in threaded connection with the nut 18.
Example 4
This embodiment is a description of a concrete implementation structure of the inner ring fixing assembly in embodiment 2.
As shown in fig. 2, the inner ring fixing assembly comprises a snap ring 6, an oil baffle disc 5 and a baffle ring 9 which are sequentially sleeved on a transmission rotating shaft 7 from left to right, the bearing 4 is positioned between the oil baffle disc 5 and the baffle ring 9, and two ends of an inner ring of the bearing are respectively contacted with the oil baffle disc 5 and the baffle ring 9;
the oil seal 8 is positioned on the left side of the clamping ring 6, the oil distribution sleeve 15 is positioned on the right side of the baffle ring 9, and the inner ring of the clamping ring 6 is inserted into a clamping ring groove 71 formed in the transmission rotating shaft 7.
Example 5
The present embodiment is specifically described with respect to the matching hole and the matching shaft body between the transmission rotating shaft 7 and the bearing seat 13 in the above embodiments.
As shown in fig. 2, in the present invention, the shaft body of the transmission rotating shaft 7 located inside the bearing seat 13 is a two-stage stepped shaft structure, and the outer diameter of the left side is greater than that of the right side; the inner hole of the bearing seat 13 is a four-stage stepped hole, the bore diameters of which are sequentially reduced from left to right, the left hole section is a bearing mounting hole, the inner ring of the bearing 4 is mounted on the large-diameter section shaft body of the transmission rotating shaft 7, and the inner ring and the outer ring of the oil distribution sleeve 15 are respectively matched with the small-diameter section shaft body of the transmission rotating shaft 7 and the right hole section of the four-stage stepped hole; the inner hole of the oil seal seat 3 is a secondary stepped hole, the left side of the oil seal seat is a small-diameter hole serving as an oil seal mounting hole, and the right side of the oil seal seat is a large-diameter hole matched with the outer ring of the oil baffle disc 5;
the baffle ring 9 is sleeved on the small-diameter section shaft body of the transmission rotating shaft 7, the outer ring of the baffle ring is inserted into the right two-hole section of the four-stage stepped hole, and a gap is reserved between the outer ring of the baffle ring and the right two-hole section of the four-stage stepped hole;
the small lubricating oil hole 136 communicates the bearing mounting hole with the lubricating oil hole 1311 through the left second hole section of the four-stage stepped hole;
the left end of the transmission rotating shaft 7 protrudes outwards to form a middle-diameter section shaft body with the shaft diameter smaller than that of the large-diameter section shaft body, the oil baffle disc 5 and the inner ring of the oil seal 8 are matched with the middle-diameter section shaft body, and the snap ring groove 71 is arranged on the middle-diameter section shaft body.
In order to further improve the reliability of the oil seal of the present invention, an oil return groove 31 is processed on the oil seal base 3, as shown in fig. 4, the oil return groove 31 is processed on the large-diameter hole of the oil seal base 3, and an oil return hole 133 communicated with the oil return groove 31 is processed on the bearing base 13, so that the lubricating oil entering the bearing mounting hole can be returned through the oil return groove 31 and the oil return hole 133 to ensure the reliability of the oil seal.
Example 6
The inner seal assembly of the present invention is embodied as follows: the inner sealing assembly comprises a sealing ring for static sealing arranged on a matching surface between the box body end cover 2 and the bearing seat 13 and a plurality of sealing rings 14 for dynamic sealing which are all sleeved on an oil distribution sleeve 15, wherein the sealing rings 14 enable lubricating oil in a lubricating oil channel from the bearing seat 13 to enter a lubricating hole channel inside the transmission rotating shaft 7 only, and control oil in a control oil channel from the bearing seat 13 can enter a controlled end only through the oil distribution sleeve 15.
Further, the right side of the outer circumferential wall of the bearing seat 13 protrudes outwards to form an end face 132, the left side of the end face 132 is in contact with the right side of the tank body end cover 2, the sealing rings comprise an O-ring a11 and an O-ring b12 which are attached to the tank body end cover, the O-ring a11 is sleeved in an O-ring groove a1312 on the outer circumferential wall of the bearing seat 13, and the O-ring b12 is located in an O-ring groove b1321 on the end face 132.
Example 7
The lubricating oil passage and the control oil passage in the present invention are specifically as follows:
the lubricating oil channel comprises: a lubricating oil channel 22 arranged on the box body end cover 2, a lubricating oil hole 1311 arranged on the bearing seat 13, a lubricating oil hole c1511 arranged on the oil distribution sleeve 15, and a lubricating oil hole a72 and a lubricating oil hole b73 which are arranged inside the transmission rotating shaft 7;
the control oil channel comprises the following parts in communication in sequence: the oil distribution sleeve comprises a control oil passage 24 arranged on a box end cover 2, a control oil hole 1351 arranged on a bearing seat 13, a control oil hole a1521 and a control oil hole b1531 which are arranged inside the oil distribution sleeve 15, wherein the control oil hole b1531 is communicated with a controlled end far away from the control oil hole a1521, specifically, the control oil hole b1531 is preferably arranged along the axis of the oil distribution sleeve 15, an O-shaped ring groove 153 is arranged at one end of the control oil hole b1531 far away from the control oil hole a1521, and an O-shaped sealing ring is arranged in the O-shaped ring groove 153.
Further, one end of the lubricating oil hole 1311 opposite to the circumference where the lubricating oil hole c1511 is located is preferably in a crescent groove a1341 structure, and the crescent groove a1341 communicates the lubricating oil hole 1311 with the ring groove a 151; the end of the pilot oil hole 1351 opposite to the circumference where the pilot oil hole a1521 is located is preferably in the structure of a crescent groove b1342, and the crescent groove b1342 connects the pilot oil hole 1351 with the ring groove b 152.
Further, an annular groove a151 and an annular groove b152 are respectively provided on the circumferences of the lubricating oil hole c1511 and the operating oil hole a1521 on the oil distribution sleeve 15.
Further, the lubricating oil hole c1511, the lubricating oil hole a72 and the operating oil hole a1521 are all multiple and are respectively distributed along the axial center of the oil distribution sleeve 15 in a symmetrical manner.
Further, the lubricating oil holes c1511 and the lubricating oil holes a72 are the same in number and are communicated in a one-to-one correspondence manner.
Claims (9)
1. Design high rotational speed derailleur pivot double-circuit that integrates joins in marriage oily and sealed, bearing structure, including transmission pivot (7), support the sealed supporting component of transmission pivot (7), join in marriage oily passageway and prevent the interior seal assembly that the fluid in joining in marriage oily passageway leaked, its characterized in that through bearing (4): the sealing support assembly comprises an inner ring fixing assembly, an outer ring limiting support assembly and an oil seal (8), wherein the inner ring fixing assembly is sleeved on the transmission rotating shaft (7) and used for axially limiting the inner ring of the bearing (4), the outer ring limiting support assembly is used for supporting and axially limiting the outer ring of the bearing (4), and the oil seal (8) is used for sealing the shaft extension end on the left side of the transmission rotating shaft (7) with the outer ring limiting support assembly;
the oil distribution channel comprises a lubricating oil channel for lubricating the transmission and an operating oil channel for gear shifting operation of the transmission;
an oil distribution sleeve (15) sleeved on the transmission rotating shaft (7) is arranged between the outer ring limiting and supporting assembly and the transmission rotating shaft (7) and positioned on the right side of the bearing (4), the lubricating oil channel sequentially penetrates through the outer ring limiting and supporting assembly and the oil distribution sleeve (15) and then enters a lubricating hole channel in the transmission rotating shaft (7), and a small lubricating oil hole (136) communicating the lubricating oil channel with a bearing mounting hole in the outer ring limiting and supporting assembly for mounting the bearing (4) is formed in the outer ring limiting and supporting assembly;
the control oil channel sequentially passes through the outer ring limiting support assembly and the oil distribution sleeve (15) and then enters the controlled end; the inner sealing assembly enables lubricating oil of the lubricating oil channel to flow only in the lubricating oil channel, and enables operating oil of the operating oil channel to flow only in the operating oil channel.
2. The integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure as claimed in claim 1, wherein: the outer ring limiting and supporting assembly comprises a bearing seat (13), a box body end cover (2) sleeved on the bearing seat (13) and an oil seal seat (3) sleeved on the transmission rotating shaft (7) and positioned on the left side of the bearing seat (13), the inner ring and the outer ring of the bearing (4) are respectively arranged on the transmission rotating shaft (7) and the bearing seat (13), and the left side and the right side of the outer ring of the bearing (4) are respectively contacted with the oil seal seat (3) and the end face of a bearing seat mounting hole; the left side and the right side of the box body end cover (2) are fixedly connected with the oil seal seat (3) and the bearing seat (13) through a fastener A and a fastener B respectively;
the lubricating oil distribution sleeve (15) is positioned between the bearing seat (13) and the transmission rotating shaft (7), the lubricating oil channel sequentially penetrates through the box body end cover (2), the bearing seat (13) and the oil distribution sleeve (15) and then enters a lubricating hole channel in the transmission rotating shaft (7), and a small lubricating oil hole (136) for communicating the lubricating oil channel with the bearing mounting hole is formed in the bearing seat (13); the operating oil channel sequentially penetrates through the box body end cover (2), the bearing seat (13) and the oil distribution sleeve (15) and then enters the operated end;
and the inner ring and the outer ring of the oil seal (8) are respectively attached to the transmission rotating shaft (7) and the wall of an oil seal mounting hole in the oil seal seat (3).
3. The integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure as claimed in claim 2, wherein: the inner ring fixing assembly comprises a clamping ring (6), an oil baffle disc (5) and a baffle ring (9) which are sequentially sleeved on the transmission rotating shaft (7) from left to right, the bearing (4) is positioned between the oil baffle disc (5) and the baffle ring (9), and two ends of the inner ring of the bearing are respectively contacted with the oil baffle disc (5) and the baffle ring (9);
the oil blanket (8) are located snap ring (6) left side, join in marriage oil jacket (15) and are located the right side that keeps off ring (9), the inner circle of snap ring (6) inserts in the card annular (71) that set up on transmission rotating shaft (7).
4. An integrated design high rotational speed derailleur pivot two-way distribution of oil and sealing, bearing structure of claim 3 characterized in that: the shaft body of the transmission rotating shaft (7) positioned at the inner side of the bearing seat (13) is of a two-stage stepped shaft structure, and the outer diameter of the left side is larger than that of the right side; the inner hole of the bearing seat (13) is a four-stage stepped hole, the hole diameters of which are sequentially reduced from left to right, the left hole section is a bearing mounting hole, the inner ring of the bearing (4) is mounted on the large-diameter section shaft body of the transmission rotating shaft (7), and the inner ring and the outer ring of the oil distribution sleeve (15) are respectively matched with the small-diameter section shaft body of the transmission rotating shaft (7) and the right hole section of the four-stage stepped hole; the inner hole of the oil seal seat (3) is a secondary stepped hole, the left side of the oil seal seat is a small-diameter hole serving as an oil seal mounting hole, and the right side of the oil seal seat is a large-diameter hole matched with the outer ring of the oil baffle disc (5);
the baffle ring (9) is sleeved on the small-diameter section shaft body of the transmission rotating shaft (7), the outer ring of the baffle ring is inserted into the right two-hole section of the four-stage stepped hole, and a gap is reserved between the outer ring of the baffle ring and the right two-hole section of the four-stage stepped hole;
the small lubricating oil hole (136) is communicated with the bearing mounting hole and the lubricating oil hole (1311) through a left second hole section of the four-stage stepped hole;
the left end evagination one-tenth shaft diameter of transmission pivot (7) is less than the intermediate diameter section axis body of major diameter section axis body, the inner circle of oil baffle dish (5) and oil blanket (8) all cooperates with the intermediate diameter section axis body, snap ring groove (71) set up on the intermediate diameter section axis body.
5. The integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure as claimed in claim 2, wherein: the inner sealing assembly comprises a sealing ring for static sealing arranged on a matching surface between a box body end cover (2) and a bearing seat (13) and a plurality of sealing rings (14) which are all sleeved on an oil distribution sleeve (15) and used for dynamic sealing, wherein the sealing rings (14) enable lubricating oil in a lubricating oil channel from the bearing seat (13) to enter a lubricating hole channel inside the transmission rotating shaft (7) and enable operating oil in an operating oil channel from the bearing seat (13) to enter an operated end through the oil distribution sleeve (15).
6. The integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure as claimed in claim 5, wherein: the right side of the outer circumferential wall of the bearing seat (13) protrudes outwards to form an end face (132), the left side of the end face (132) is in contact with the right side of the box body end cover (2), the sealing ring comprises an O-ring a (11) and an O-ring b (12) which are attached to the box body end cover, the O-ring a (11) is sleeved in an O-ring groove a (1312) in the outer circumferential wall of the bearing seat (13), and the O-ring b (12) is located in an O-ring groove b (1321) in the end face (132).
7. The integrated design high-speed transmission rotating shaft two-way oil distribution, sealing and supporting structure as claimed in claim 5, wherein: the lubricating oil channel comprises: a lubricating oil channel (22) arranged on the box body end cover (2), a lubricating oil hole (1311) arranged on the bearing seat (13), a lubricating oil hole c (1511) arranged on the oil distribution sleeve (15), and a lubricating oil hole a (72) and a lubricating oil hole b (73) which are arranged in the transmission rotating shaft (7);
the control oil channel comprises the following parts in communication in sequence: the oil distribution sleeve is characterized by comprising a control oil passage (24) arranged on a box body end cover (2), a control oil hole (1351) arranged on a bearing seat (13), a control oil hole a (1521) and a control oil hole b (1531) which are arranged inside the oil distribution sleeve (15), wherein the control oil hole b (1531) is far away from the control oil hole a (1521) and is communicated with a controlled end.
8. An integrated design high rotational speed derailleur pivot two-way distribution of oil and sealing, bearing structure of claim 7, characterized by: and a ring groove a (151) and a ring groove b (152) are respectively arranged on the circumferences of the lubricating oil hole c (1511) and the operating oil hole a (1521) on the oil distribution sleeve (15).
9. An integrated design high rotational speed derailleur pivot two-way distribution of oil and sealing, bearing structure of claim 7, characterized by: the lubricating oil holes c (1511), the lubricating oil holes a (72) and the control oil holes a (1521) are all multiple and symmetrically distributed along the axis center of the oil distribution sleeve (15), and the lubricating oil holes c (1511) are the same as the lubricating oil holes a (72) in number and are communicated in a one-to-one correspondence mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795655.8A CN111998057B (en) | 2020-08-10 | 2020-08-10 | Integrated design high-speed transmission rotating shaft double-path oil distribution, sealing and supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795655.8A CN111998057B (en) | 2020-08-10 | 2020-08-10 | Integrated design high-speed transmission rotating shaft double-path oil distribution, sealing and supporting structure |
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| CN111998057A true CN111998057A (en) | 2020-11-27 |
| CN111998057B CN111998057B (en) | 2024-06-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113108031A (en) * | 2021-05-10 | 2021-07-13 | 柳工柳州传动件有限公司 | Gearbox for engineering machinery and loader |
| CN113389882A (en) * | 2021-05-31 | 2021-09-14 | 东风商用车有限公司 | Gear box flange divides oily structure |
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| CN113389882A (en) * | 2021-05-31 | 2021-09-14 | 东风商用车有限公司 | Gear box flange divides oily structure |
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| CN111998057B (en) | 2024-06-14 |
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