CN107299966B

CN107299966B - A kind of planetary transmission

Info

Publication number: CN107299966B
Application number: CN201610235551.5A
Authority: CN
Inventors: 杨玉磊; 何爱民; 路会龙; 张合超; 戚松
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2016-04-15
Filing date: 2016-04-15
Publication date: 2019-09-24
Anticipated expiration: 2036-04-15
Also published as: CN107299966A

Abstract

It includes cabinet, planetary gear, sun gear, ring gear, planetary gear shaft and transmission shaft that the present invention, which discloses a kind of planetary transmission, it is set at least two sliding bearings in planetary gear shaft and between planetary gear shaft and planetary gear side by side along axial direction, two sliding bearings axially engage to form recess；Sun gear is fixed on transmission shaft, sliding bearing is fixed in planetary gear shaft or on planet stent or on planetary gear, be recessed the axial movement of restrictions planetary gear or the axial movement of the radially protruding part limitation recess of planetary gear shaft, so that the axial movement of star gear is limited in recess or in the radially protruding part of planetary gear shaft, then the effect of planetary gear xial feed and radial load act on the inner wall being recessed herein or in the radially protruding part of planetary gear shaft, to which sliding bearing bears planetary gear xial feed and radial load simultaneously, reduce the axial dimension of speed changer and the weight of speed changer, reduce manufacture and the installation cost of speed changer.

Description

A kind of planetary transmission

Technical field

The present invention relates to the speed changers of wind-powered electricity generation industry, and in particular to a kind of planetary transmission.

Background technique

Being applied to the planetary transmission in wind power equipment in the prior art is speeder, and structure is mostly such as China Planetary transmission disclosed in patent document CN202182159U is fixed on cabinet 1 as shown in Figure 1, including cabinet 1 Ring gear 4, the planet stent 5 and transmission shaft 2 being rotatably connected on cabinet 1, is fixed on several on planet stent 5 The axis of planetary gear shaft 6, planetary gear shaft 6 is parallel with the axis of transmission shaft 2, the planet being set in planetary gear shaft 6 Gear, the sun gear 3 being fixed on transmission shaft 2, between ring gear 4 and sun gear 3, planetary gear 5 divides planetary gear 5 It is not engaged with ring gear 4 and sun gear 3.

The planetary transmission of above structure, to prevent planetary gear 7 from axially and radially having movement tendency, Yi Jicheng It further include the radial direction being arranged between planetary gear shaft 6 and planetary gear 7 by the xial feed and radial load of planetary gear 7 Sliding bearing 108, and the axial plain bearing 105 being arranged between 7 axial end face of planetary gear and planet stent 5.

But the bush(ing) bearing 108 in the speed changer of this structure can only bear radial load, axial plain bearing is only Xial feed can be born, for the radial motion and axial movement of restrictions planetary gear 7 simultaneously, bush(ing) bearing 108 and axis It is held to sliding axle 105 indispensable；The axial plain bearing being provided separately between 7 end face of planet stent 5 and planetary gear 105, the axial dimension and weight of speed changer are increased, causes the manufacture of speed changer and installation cost high.

Summary of the invention

Therefore, technical problem to be solved by the present invention lies in be separately provided in the planetary transmission of the prior art Bush(ing) bearing and axial plain bearing cause the axial dimension of speed changer and weight to increase, and speed changer is caused to manufacture and install Defect at high cost.

For this purpose, the present invention provides a kind of planetary transmission, including

Cabinet,

Ring gear is fixed on the cabinet wall；

Transmission shaft coaxially with the ring gear is rotatably arranged on the cabinet, as power output end；

Sun gear is fixed on the transmission shaft；

Planet stent is rotatably arranged on the cabinet, as power intake；

The axis of planetary gear shaft, at least one, axis and the transmission shaft is fixed on the planet in parallel On bracket；

Planetary gear is rotatably sleeved in each planetary gear shaft, be located at the ring gear inner radial and The sun gear radially outer, and engaged respectively with the ring gear and the sun gear；Further include

Sliding bearing is at least two, is set in the planetary gear shaft side by side along axial direction, is located at the planetary gear Between axis and the planetary gear, two sliding bearings axially engage to form radial recess；

The sliding bearing is fixed in planetary gear shaft and/or the axial outside wall surface of the sliding bearing is fixed on institute It states on planet stent, and the recess covers internal surface of hole towards the planetary gear, the planetary gear covers internal surface of hole Equipped with the radially protruding part for being suitable for being embedded in the recess, and the range being axially moved by the limitation of the axial ends of the recess； Or

The sliding bearing is fixed on the planetary gear, and the diameter of recess towards the planetary gear shaft is outside Surface, the radially-outer surface of the planetary gear shaft are equipped with the radially protruding part for being suitable for being embedded in the recess, the planet tooth The radially protruding part of wheel shaft limits the axial movement of the axial ends of the recess.

Above-mentioned planetary transmission, two sliding bearings being set in side by side along axial direction in the planetary gear shaft In, each sliding bearing includes first axis positioning region and is arranged in the first of first axis positioning region end and radially extends Portion；

The first axis positioning region is fixed in the planetary gear shaft and/or the axis of first radial extension It is fixed on the planet stent to outside wall surface；

The axial inner wall of two first radial extensions limits the planetary gear axial movement.

Above-mentioned planetary transmission, two sliding bearings being set in side by side along axial direction in the planetary gear shaft In,

One sliding bearing includes first axis positioning region and the first diameter that first axis positioning region end is arranged in To extension, another described sliding bearing includes with the first axis positioning region far from first radial extension First radial extension of one end fits；

Above-mentioned planetary transmission, first radial extension be the first circular cone or the first arc block, two Two the first circular cones of the sliding bearing or two the first arc blocks are oppositely arranged, two first circular cones or two The diameter of first arc block is gradually increased from close to mutual position away from mutual position.

Above-mentioned planetary transmission, the planetary gear radially protruding part include the second axially position portion and molding The second radial extension on second axially position portion both ends；

Second axially position portion is matched with the first axis positioning region of sliding bearing；Second radial direction is prolonged Extending portion is matched with first radial extension.

Above-mentioned planetary transmission, second axially position portion and/or the first axis positioning region are cylinder Shape block；Second radial extension is the second circular cone or the second arc block；

Two second circular cones or the diameter of two second arc blocks from close to mutual position away from Mutual position is gradually reduced.

Above-mentioned planetary transmission, two sliding bearings being set in side by side along axial direction in the planetary gear shaft In, each sliding bearing is third circular cone, and the third circular cone is fixed in the planetary gear shaft；

The diameter of two third circular cones is gradually increased from close to mutual part to mutual position is located remotely from, The axial inner wall of two third circular cones limits the planetary gear axial movement.

Above-mentioned planetary transmission, the planetary gear radially protruding part are the first tapered protrusion；

The diameter of first tapered protrusion is gradually increased from its axial both ends to centre, two third circular cones Axial inner wall limit the axial movement of first tapered protrusion.

Above-mentioned planetary transmission, one end of the planetary gear shaft have the towards the sliding bearing side One step, the axial outside wall surface close to the sliding bearing of the first step are resisted against on the first step.

Above-mentioned planetary transmission, the first axis positioning region of two of two sliding bearings are fixed on institute State in planetary gear shaft, close to the first step the sliding bearing the first radial extension axial outside wall surface against On the first step；And/or

The axial outside wall surface of first radial extension of the sliding bearing far from the first step is fixed on described On planet stent.

Above-mentioned planetary transmission, the axial outer wall of two of two sliding bearings, first radial extension Face is fixed on the planet stent, and the axis close to the first axis positioning region of the sliding bearing of the first step is outside Wall surface is resisted against on the first step.

Above-mentioned planetary transmission, in two sliding bearings, the first of a sliding bearing is radial to prolong The axial outside wall surface of extending portion is fixed on the planet stent；

The first axis positioning region of another sliding bearing is fixed in the planetary gear shaft, and the sliding The axial outside wall surface of first radial extension of bearing is resisted against on the first step.

Above-mentioned planetary transmission, close to the first step the third circular cone axial outside wall surface against On the first step.

Above-mentioned planetary transmission, two sliding bearings being set in side by side along axial direction in the planetary gear shaft In, each sliding bearing is fixed on the planetary gear；

The radially protruding part of the planetary gear shaft is the second tapered protrusion, and the diameter of second tapered protrusion is from its axis To both ends be gradually increased to centre, axial outside wall surface limits the axial movement of the recess.

Above-mentioned planetary transmission, the sliding bearing be the 4th circular cone, two of two sliding bearings 4th circular cone is oppositely arranged, the diameters of two the 4th circular cones from close to mutual part to being located remotely from each other Position be gradually increased.

Above-mentioned planetary transmission, two sliding bearings being set in side by side along axial direction in the planetary gear shaft In, each sliding bearing is fixed on the planetary gear；The protruding portion of planetary gear shaft includes third axially position portion With the third radial extension being molded on third axially position portion both ends；The axis of the third radial extension is outside Wall surface limits the axial movement of the recess.

Above-mentioned planetary transmission, the sliding bearing include that the 4th axially position portion and setting are axial fixed the 4th The 4th radial extension on position portion end, the 4th axially position portion of two of two sliding bearings and third are axial Positioning region matches, and the 4th radial extension is matched with third radial extension.

Above-mentioned planetary transmission, the 4th axially position portion and/or third axially position portion be cylindrical block, the 4th Radial extension and/or third radial extension are the 5th circular cone；

The diameter of 5th circular cone of two sliding bearings is from close mutual position away from mutual position Be gradually increased, the diameter of the 5th circular cone of the planetary gear shaft from close to mutual position away from mutual position by It is decrescence small.

Above-mentioned planetary transmission, first circular cone and/or the second circular cone and/or third circular cone, And/or the 4th the angle of semi-cone angle of circular cone and/or the 5th circular cone be greater than 0 degree and less than 90 degree.

Table in above-mentioned planetary transmission, the radially-outer surface of the sliding bearing and the planetary gear sets of holes The first oil clearance is formed between face.

Above-mentioned planetary transmission, the inner radial surface of the sliding bearing and the diameter of the planetary gear shaft are outside The second oil clearance is formed between surface.

Above-mentioned planetary transmission further includes

Oil distribution ring, top are connected to the cabinet, and bottom is connected to the planet stent；

First oil dispersing device, for extraneous lubricating oil to be delivered in first oil clearance or the second oil clearance It is interior.

Above-mentioned planetary transmission, first oil dispersing device include

First oily channel, is provided on the cabinet, is connected to extraneous lubricating oil；

Second oily channel, is provided on the oil distribution ring, is connected to the described first oily channel；

Third oil channel, is provided on the planet stent, is connected to the described second oily channel；

4th oily channel, is provided in the planetary gear shaft, and axially extend, is connected to third oil channel；

At least two the 5th oily channels, are provided in the planetary gear shaft and/or on the sliding bearing, and radially Extend, one end is connected to the described 4th oily channel, and the other end is connected to first oil clearance or the second oil clearance.

Above-mentioned planetary transmission, first oil dispersing device further include oil distribution slot, are provided with the sliding axle It on the radially-outer surface held or on the radially-outer surface of the planetary gear shaft, and axially extends, with the described 5th oily channel Connection.

Above-mentioned planetary transmission further includes lasso, and the lasso is set in planetary gear shaft, is located at two institutes It states between sliding bearing, both ends form gap with the axial end face of two sliding bearings respectively.

Above-mentioned planetary transmission, the planet stent include first support and second support；The planetary gear One end of axis is fixed in first support, and the other end is fixed on the secondary support bracket；Described second oily channel is provided with described second On bracket；Further include

Second oil dispersing device, for the lubricating oil in the oil sump being arranged on the cabinet to be delivered between first oil film In gap or the second oil clearance.

Above-mentioned planetary transmission, second oil dispersing device include

First oilhole is provided in the first support, and one end can be connected to the oil sump being arranged on the cabinet；

Second oilhole is provided in the planetary gear shaft, axially extends, and is connected to first oilhole；

Third oilhole is provided in the planetary gear shaft, radially extends, between the adjacent sliding bearing Gap location, one end are connected to second oilhole, and the other end is connected to first oil clearance or the second oil clearance.

Above-mentioned planetary transmission, second oil dispersing device further includes first through hole, is provided on the lasso, First oil clearance is connected to the third oilhole.

Above-mentioned planetary transmission, second oil dispersing device further include the first oil scraper ring, are arranged described second On the end face of the close first support of oilhole.

Technical solution provided by the invention, has the advantages that

1. planetary transmission provided by the invention, including cabinet, be rotatably provided in cabinet upper planetary gear axis and Transmission shaft, the planetary gear being rotatably sleeved in planetary gear shaft, the sun gear being fixed on transmission shaft are fixed on Ring gear on cabinet wall, planetary gear are located at ring gear inner radial and sun gear radially outer, and with sun gear and interior Gear ring engages respectively, and is set in planetary gear shaft and between planetary gear shaft and planetary gear side by side along axial direction At least two sliding bearings, two sliding bearings axially engage to form radial recess；Sliding bearing is fixed on planetary gear shaft Or the axial outside wall surface of sliding bearing is fixed on planet stent, recess covers internal surface of hole, planetary gear towards planetary gear Set internal surface of hole be equipped with the radially protruding part for being suitable for being embedded in recess, the planetary gear and axial ends being recessed limitation is axial The range of movement；Or sliding bearing is fixed on planetary gear, the radially-outer surface being recessed towards planetary gear shaft, planet tooth The radially-outer surface of wheel shaft is equipped with the radially protruding part for being suitable for being embedded in recess, and the radially protruding part of planetary gear shaft limits recess Axial ends axial movement.

The planetary transmission of above structure, in planetary gear rotation, two inner walls of recess pass through limitation planet The axial movement of the radially protruding part of gear；Or the axial direction of the recess of the radially protruding part limit slippage bearing of planetary gear shaft It moves, and then planetary gear axial movement is only limitted in this recess or in the radially protruding part of planetary gear shaft, then planet The xial feed of gear acts against on the inner wall of this recess or in the radially protruding part of planetary gear shaft, planetary gear diameter It acts also on the inner wall that this is recessed to load or is acted in planetary gear shaft by sliding bearing, so that sliding bearing is same When bear planetary gear xial feed and radial load, without as two axis that slide axially also are separately provided in the prior art It holds, to bear planetary gear xial feed, to reduce the axial dimension of speed changer and the weight of speed changer, reduces speed changer Manufacture and installation cost.

2. planetary transmission provided by the invention, when sliding bearing is fixed on planetary gear shaft or planet stent, One end of planetary gear shaft has the first step towards sliding bearing side, and the axis close to the sliding bearing of first step is outside Wall surface is resisted against on the first step.When assembling the speed changer of above structure, planetary gear shaft is convenient in the setting of first step It across sliding bearing and then is mounted on planet stent, so that first step plays positioning action, the axial outer wall of sliding bearing Face is resisted against on first step, and the xial feed that planetary gear is acted on sliding bearing is transmitted through this first step To planetary gear shaft.

3. planetary transmission provided by the invention, two sliding axles being set in side by side along axial direction in planetary gear shaft In holding, each sliding bearing includes first axis positioning region and is arranged in the first of first axis positioning region end and radially extends Portion；First axis positioning region is fixed in planetary gear shaft and/or the axial outside wall surface of the first radial extension is fixed on planet On bracket, the axial movement of the axial inner wall restrictions planetary gear of the first radial extension.The speed changer of this structure, two Two the first radial extensions of a sliding bearing form opening towards planetary gear sets of holes with two first axis positioning regions The recess of inner surface, bearing plane of two the first radial extensions as planetary gear axial direction load, two first axis positioning Bearing plane of the portion as planetary gear radial load, two the first radial extensions stop the two of planetary gear radially protruding part The axial movement at end, to limit planetary gear axial movement.

4. planetary transmission provided by the invention, sliding bearing are fixed on planetary gear；Planetary gear shaft is dashed forward Portion includes third axially position portion and the third radial extension that is molded on third axially position portion both ends out；Third is radial The axial movement of the axial ends of the outside wall surface limitation recess of extension.The planetary gear shaft of this structure, two third diameters The face that is primarily subjected to extension as planetary gear axial direction load, master of the third axially position as planetary gear radial load Bearing plane is wanted, this radially protruding part is located in the recess of two sliding bearings formation, and it is recessed that two third radial extensions limit this Sunken axial movement, to realize the limitation to planetary gear axial movement.

5. planetary transmission provided by the invention, radially-outer surface and the table in planetary gear sets of holes of sliding bearing Shape between the inner radial surface of the first oil clearance or sliding bearing and the radially-outer surface of planetary gear shaft is formed between face At the second oil clearance.It further include the oil distribution ring and the first oil dispersing device being arranged between cabinet and planet stent, the first cloth Oily device is used to for extraneous lubricating oil being delivered in the first oil clearance or the second oil clearance.

When needing to lubricating oil is added in the first oil clearance or the second oil clearance, extraneous lubricating oil is made in pressure Entered in the first oil clearance or the second oil clearance with lower through the first oil dispersing device, forms forced feed lubrication mode；Planet later The rotation of gear can be with the lubricant movement in the first oil clearance or the second oil clearance, in the first oil clearance or the Effective dynamic pressure oil film effect is formed in two oil clearances, it is not necessary that under ambient pressure effect, lubricating oil can be in the first oil film With planetary gear rotation in gap or the second oil clearance, thus to the diameter of planetary gear set internal surface of hole and sliding bearing The radially-outer surface of the inner radial surface and planetary gear shaft of exterior surface or sliding bearing is lubricated, and is reduced and is even avoided It wears.Also, during entire planetary gear rotation, axial end face is in free end, so that planetary gear axial end Wear phenomenon will not occur for face, improve the planetary gear service life.

Detailed description of the invention

It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of planetary transmission in the prior art；

Fig. 2 is the longitudinal cross-section schematic diagram of planetary transmission in Fig. 1；

Fig. 3 is the planetary stage schematic diagram of planetary transmission provided by the embodiment of the present invention；

Fig. 4 is that the longitudinal cross-section of the first embodiment of planetary transmission provided by the embodiment of the present invention 1 shows It is intended to；

Fig. 5 is that the longitudinal cross-section of second of embodiment of planetary transmission provided by the embodiment of the present invention 1 shows It is intended to；

Fig. 6 is the longitudinal cross-section schematic diagram of planetary transmission provided in the embodiment of the present invention 2；

Fig. 7 is the longitudinal cross-section of the first embodiment of planetary transmission provided in the embodiment of the present invention 3 Schematic diagram；

Fig. 8 is the longitudinal cross-section of second of embodiment of planetary transmission provided in the embodiment of the present invention 3 Schematic diagram；

Fig. 9 is the longitudinal cross-section schematic diagram of star gear-shift mechanism provided by the embodiment of the present invention 4；

Description of symbols: 1- cabinet；2- transmission shaft；3- sun gear；4- ring gear；5- planet stent；51- first Frame；52- second support；6- planetary gear shaft；The second tapered protrusion of 61-；62- first step；63- second step；7- planet tooth Wheel；The second radial extension of 71-；The second axially position of 72- portion；The first tapered protrusion of 73-；8- sliding bearing；81- first is radial Extension；82- first axis positioning region；83- third circular cone；The 4th circular cone of 84-；The first oil clearance of 91-；92- second Oil clearance；The oily channel 10- first；The oily channel 11- second；12- third oil channel；The oily channel 13- the 4th；The 5th oil of 14- is logical Road；15- oil distribution slot；16- lasso；The first oilhole of 17-；The second oilhole of 18-；19- third oilhole；The first oil scraper ring of 20-；21- Second oil scraper ring；22- oil distribution ring；105- axial plain bearing；108- bush(ing) bearing；A- semi-cone angle.

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.

As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments It can be combined with each other at conflict.

Embodiment 1

The present embodiment provides a kind of planetary transmissions, as shown in figure 3, including

Cabinet 1,

Ring gear 4 is fixed on 1 inner wall of cabinet；

Transmission shaft 2 coaxially with ring gear 4 is rotatably arranged on cabinet 1, as power output end；

Sun gear 3 is fixed on transmission shaft 2；

Planet stent 5 is rotatably arranged on cabinet 1, as power intake；

The axis of planetary gear shaft 6, at least one, axis and transmission shaft 2 is fixed on planet stent 5 in parallel On；

Planetary gear 7 is rotatably sleeved in each planetary gear shaft 6, is located at 4 inner radial of ring gear and sun gear 3 radially outers, and engaged respectively with ring gear 4 and sun gear 3；Further include

Sliding bearing 8, be at least two, be set in planetary gear shaft 6 side by side along axial direction, be located at planetary gear shaft 6 with Between planetary gear 7, two sliding bearings 8 axially engage to form radial recess；

Sliding bearing 8 is fixed in planetary gear shaft 6, and the set internal surface of hole towards planetary gear 7 that is recessed, planetary gear What the axial ends limitation that 7 set internal surface of hole, which is equipped with, to be suitable for being embedded in the radially protruding part in being recessed, and be recessed was axially moved Range.

The planetary transmission of above structure fixes at least two sliding axles being set side by side in planetary gear shaft 6 8 are held, two sliding bearings 8 are being axially formed radial recess, accordingly have on the set internal surface of hole of planetary gear 7 radial prominent Portion out, this radially protruding part are located just at concave interior.When planetary gear 7 rotates, axial two inner walls of recess pass through limit The axial movement of the radially protruding part of planetary gear 7 processed, and then the axial movement of planetary gear 7 is only limitted in this recess, then On the inner wall that the xial feed effect of planetary gear 7 is recessed herein, then it is transferred in planetary gear shaft 6 and planet stent 5；Together When, sliding bearing 8 is fixed on the radially-outer surface of planetary gear shaft 6, limits the radial motion range of planetary gear 7, then The radial load of planetary gear 7 acts directly on the recess inner wall of sliding bearing 8, then is transferred to planetary gear shaft 6 and row On prong frame 5, to need to only fix the sliding bearing 8 of this structure in planetary gear shaft 6, it will be able to realize while bear planet Two axial plain bearings are also separately provided without picture, to bear to go in the xial feed and radial load of gear 7 in the prior art The xial feed of star gear 7 reduces the manufacture and peace of speed changer to reduce the axial dimension of speed changer and the weight of speed changer Dress up this.

As preferred embodiment, as shown in figure 4, one end of planetary gear shaft 6 has towards 8 side of sliding bearing First step 62, the axial outside wall surface close to the sliding bearing 8 of first step 62 are resisted against on the first step 62.In fit on When stating the speed changer of structure, the setting of first step 62 passes through sliding bearing 8 convenient for planetary gear shaft 6 and then is mounted on planet On bracket 5, so that first step 62 plays positioning action, the axial outside wall surface of sliding bearing 8 is resisted against on first step 62, makes Obtaining the xial feed that planetary gear 7 acts on sliding bearing 8 can be transferred in planetary gear shaft 6 through this first step 62.

As deformation, first step 62 can also be not provided in above-mentioned planetary gear shaft 6.

As the first preferred embodiment, as shown in figure 4, being set in two in planetary gear shaft 6 side by side along axial direction In a sliding bearing 8, each sliding bearing 8 includes first axis positioning region 82 and 82 end of first axis positioning region is arranged in First radial extension 81；First axis positioning region 82 is fixed in planetary gear shaft 6, the axis of two the first radial extensions 81 The axial movement of inside wall surface restrictions planetary gear 7.

Two the first radial extensions 81 of two sliding bearings 8 and two first axis positioning regions 82 form opening direction The recess of the set internal surface of hole of planetary gear 7, receiving of two the first radial extensions 81 as 7 xial feed of planetary gear Face, bearing plane of two first axis positioning regions 82 as 7 radial load of planetary gear.When planetary gear 7 is axially having movement When, the axial inner wall of two the first radial extensions 81 just stops the axial fortune at the both ends of the radially protruding part of planetary gear 7 It is dynamic, so that the radially protruding part of planetary gear 7 is only capable of the space between the axial inner wall of two the first radial extensions 81 Interior movement, to limit the axial movement of planetary gear 7.

It is further preferred that as shown in figure 4, the first radial extension 81 is the first circular cone, the of two sliding bearings 8 One circular cone is oppositely arranged, and the diameter of two the first circular cones gradually increases from close to mutual position away from mutual position Greatly.

As deformation, the first circular cone can be replaced the first arc block, the arc that arc block can be recessed axially inward Block, or the arc block protruded axially outward, for example, the structure of spherical arc block or other shapes as shown in Figure 8, Such as radial protrusion, xial feed face of the axial inner wall of radial protrusion as receiving planetary gear 7, or only need to be with first Axially position portion 82 matches to form above-mentioned recess, carrys out the structure of the other shapes of the axial movement of restrictions planetary gear 7 all It can be with concrete shape is depending on actual use situation.

As the preferred embodiment of planetary gear 7, as shown in figure 4, the radially protruding part of planetary gear 7 preferably includes Two axially position portion 72 and the second radial extension 71 for being molded on 72 both ends of the second axially position portion；Second axially position Portion 72 is matched with two first axis positioning regions 82 of two sliding bearings 8, and the second radial extension 71 is prolonged with the first radial direction Extending portion 81 matches.

Two first axis of the radially protruding part of this structure, the second axially position portion 72 and two sliding bearings 8 position Portion 82 is corresponding, it is ensured that the normal rotation of planetary gear 7 avoids stuck phenomenon occur in 7 rotation process of planetary gear；Meanwhile Second radial extension 71 and the first radial extension 81 correspond, so that the first radial extension 81 limitation one the The axial movement of two radial extensions 71 is defined the axial movement of planetary gear 7 to realize.

It is further preferred that first axis positioning region 82 and the second axially position portion 72 are cylindrical block；Second is radial Extension 71 is the second circular cone, the diameters of two the second circular cones from close to mutual position away from mutual position by It is decrescence small, so that the second taper and the first circular cone correspond.That is, the shape of sliding bearing 8 is cone in this embodiment Shape-cylinder, the shape of the radially protruding part of planetary gear 7 are taper-cylindrical-conical.

As deformation, the structure of similar first radial extension 81, the second radial extension 71 can also be the second arc Block is matched with the first arc block, and the diameter of two the second arc blocks is from close mutual position away from mutual position It is gradually reduced.That is, the shape of sliding bearing 8 is arc-cylinder, the radially protruding part of planetary gear 7 in this embodiment Shape be arc-cylinder-arc.

As deformation, the second radial extension 71 can also be other structures or the shape of the second radial extension 71 It is different from the shape of the first radial extension 81, for example, the first radial extension 81 is taper, the shape of the second radial extension For arc, only the second radial extension 71 is needed to match with the first radial extension 81, realizes the axial movement to planetary gear 7 Range is defined.

Further preferred embodiment, in two sliding bearings 8, close to the first of the sliding bearing 8 of first step 62 The axial outside wall surface of radial extension 81 is resisted against on first step 62.In this embodiment, the xial feed of planetary gear 7 can To be transferred in planetary gear shaft 6 through this first step 62, and then it is transferred on planet stent 5.

As more preferably preferably, the axial outer wall of the first radial extension 81 of the sliding bearing 8 far from first step 62 Face is fixed on planet stent 5.Then the xial feed of planetary gear 7 can be transferred to planet branch through this first radial extension 81 It on frame 5, without being first transferred in planetary gear shaft 6, then is transferred on planet stent 5, so that reducing planetary gear shaft 6 bears row The active force of 7 xial feed of star gear, shields to planetary gear shaft 6.

In the first above-mentioned preferred embodiment, two sliding axles being set in side by side along axial direction in planetary gear shaft 6 Hold 8 structure it is identical.

As deformation, the structure for being set in two sliding bearings 8 in planetary gear shaft 6 side by side along axial direction can not phase Together.For example, being set in side by side in planetary gear shaft 6 in two sliding bearings 8 along axial direction, a sliding bearing 8 includes first axle To positioning region 82 and the first radial extension 81 that 82 end of first axis positioning region is arranged in, another sliding bearing 8 includes The first radial extension 81 matched with one end far from the first radial extension 81 of first axis positioning region 82.

That is, a sliding bearing 8 includes above-mentioned 82 He of first axis positioning region in two above-mentioned sliding bearings 8 First radial extension 81, another sliding bearing 8 only include the first above-mentioned radial extension 81, first axis positioning region 82 It is corresponded with the second axially position portion 72 of planetary gear 7；First radial extension 81 and the second radial extension 71 are one by one It is corresponding.It only need to will only include the sliding axle of the first radial extension 81 in two sliding bearings 8 of installation in planetary gear shaft 6 It holds 8 to be fixed in planetary gear shaft 6, and is located at one end of the first axis positioning region 81 of another sliding bearing 8, on being formed The recess stated, or be set on the end of first axis positioning region 82 of another sliding bearing 8, it is convenient for two Sliding bearing 8 is fixed and positioned.

In addition, the structure of two the first radial extensions 81 in two sliding bearings 8 can be identical, it can not also phase Together, such as two the first radial extensions 81 of two sliding bearings 8 are the first circular cone or the first arc block；Or one First radial extension 81 of a sliding bearing 8 is the first circular cone, and the first radial extension 81 of another sliding bearing 8 is First spherical arc block.

As second of preferred embodiment, as shown in figure 5, being set in two in planetary gear shaft 6 side by side along axial direction In a sliding bearing 8, each sliding bearing 8 is third circular cone 83, and third circular cone 83 is fixed in planetary gear shaft 6, two The diameter of a third circular cone 83 is gradually increased from close to mutual part to mutual position is located remotely from, two third tapers The axial movement of the axial inner wall restrictions planetary gear 7 of block 83.

This embodiment, two third circular cones 83 being oppositely arranged form opening towards 7 sets of internal surface of hole of planetary gear Conical indentation, the axial movement of the radially protruding part of the planetary gear 7 of the axial inner wall agretope of conical indentation in the inner, That is, the tapered surface limitation of two third circular cones 83 is located at the axial direction of the radially protruding part of the planetary gear 7 in conical indentation Movement.

It is further preferred that as shown in figure 5, the radially protruding part of planetary gear 7 is the first tapered protrusion 73, the first taper The diameter of protrusion 73 is gradually increased from its axial both ends to centre, so that the first tapered protrusion 73 and two third circular cones 83 conical indentations formed match, to realize that the axial inner wall of third circular cone 83 limits the axis of the first tapered protrusion 73 To motion range.

As deformation, third circular cone 83 can be replaced arc block, such as the block of spherical arc block or other shapes Body, such as the protruding block to extend radially outwardly need to only be located in recess, and axial movement is limited by this recess.

As more preferably preferred embodiment, the axial outside wall surface close to the third circular cone 83 of first step 62 is resisted against On first step 62.

Embodiment 2

The present embodiment provides a kind of planetary transmission, the difference of the planetary transmission provided with embodiment 1 is only Be: the axial outside wall surface of sliding bearing 8 is fixed on planet stent 5, and the inner radial surface of sliding bearing 8 is not fixed in planet On gear shaft 6, only it is set in planetary gear shaft 6.The planetary transmission of this structure, planetary gear 7 are applied to sliding Xial feed and radial direction on bearing 8 are transferred directly on planet stent 5, without being transferred to planet branch again through planetary gear shaft 6 On frame 5, so that 6 receiving portion of planetary gear shaft divides the axially and radially load of planetary gear 7, guarantor is played to planetary gear 6 Shield effect.

As preferred embodiment, as shown in fig. 6, two slidings being set in side by side along axial direction in planetary gear shaft 6 In bearing 8, two first axis positioning regions 82 of two sliding bearings 8 are set in planetary gear shaft 6, and two first radial The axial outside wall surface of extension 81 is fixed on planet stent 5.In this embodiment, the first of two sliding bearings 8 is radial to prolong The axial outside wall surface of extending portion 81 is each attached on planet stent 5.

More preferably preferably, in two sliding bearings 8, close to the first axis positioning region of the sliding bearing 8 of first step 62 82 axial outside wall surface is resisted against on first step 62.In this embodiment, close to the first of the sliding bearing 8 of first step 62 The axial outside wall surface of radial extension 81 axial direction preferably concordant with the axial outside wall surface of first axis positioning region 82 or the two Outside wall surface can not also be concordant.

It should be noted that planetary transmission provided in this embodiment, in addition to the fixed form of sliding bearing 8 is different Outside, other structures are identical as the structure of planetary transmission provided in embodiment 1.

Embodiment 3

The present embodiment provides a kind of planetary transmissions, as shown in Figure 7 and Figure 8, and mention in embodiment 1 and embodiment 2 The difference of the planetary transmission of confession is: it is set in side by side along axial direction in two sliding bearings 8 in planetary gear shaft 6, The axial outside wall surface of first radial extension 81 of one sliding bearing 8 is fixed on planet stent 5；Another sliding bearing 8 First axis positioning region 82 be fixed in planetary gear shaft 6.

The planetary transmission of this structure, the xial feed and radial load of planetary gear 7 can both pass through sliding axle It holds 8 to be transferred directly on planet stent 5, and can be transferred in planetary gear shaft 6 through sliding bearing 8, then be transferred to planet branch On frame.That is, the planetary transmission that this embodiment provides is the planetary gear speed-changing for providing embodiment 1 and embodiment 2 The embodiment that the fixed form of two kinds of sliding bearings 8 in device is combined.

It is further preferred that the sliding bearing 8 being fixed in planetary gear shaft 6, the first of the sliding bearing 8 is radially extended The axial outside wall surface in portion 81 is resisted against on first step 62.

First radial extension 81 of sliding bearing 8 shown in fig. 7 is circular cone, accordingly the second of planetary gear 7 Radial extension 72 is circular cone, as deformation, as shown in figure 8, the first radial extension 81 of sliding bearing 8 is spherical arc Block, accordingly the second radial extension 72 of the protruding portion of planetary gear 7 is spherical arc block.

More preferably preferably, in the planetary transmission of two kinds of structures in Fig. 7 and Fig. 8, in two sliding bearings 8, one A sliding bearing 8 only includes the first radial extension 81, such as circular cone or spherical arc block, the first diameter of the sliding bearing 8 It is fixed on planet stent 5 to extension 81；Another sliding bearing 8 includes that the first radial extension 81 and first axis position The axial outside wall surface in portion 82, the first radial extension 81 of this sliding bearing 8 is resisted against on first step 62, first axis positioning Portion 82 is fixed in planetary gear shaft 6.

In above three embodiments, preferably, the radially-outer surface in the first axis positioning region 82 of sliding bearing 8 One annular protrusion of upper setting, which in axial direction extends, when being tilted with adapting to planetary gear 7, sliding axle It holds 8 still to be able to be cooperated with planetary gear 7, guarantees the normal rotation of planetary gear 7.

Embodiment 4

The present embodiment provides a kind of planetary transmissions, as shown in figure 9, the planetary gear speed-changing provided with embodiment 1 The difference of device is: it is not fixed in planetary gear shaft 6 along the sliding bearing 8 that axial direction is set in planetary gear shaft 6, but it is solid It is scheduled on planetary gear 7, and the radially-outer surface towards planetary gear shaft 6 that is recessed, the radially-outer surface of planetary gear shaft 6 are equipped with Suitable for the radially protruding part being embedded in recess, the axial fortune of the axial ends of the radially protruding part limitation recess of planetary gear shaft 6 Dynamic range.

The planetary transmission of above structure, sliding bearing 8 are fixed on planetary gear 7, pass through planetary gear shaft 6 Radially protruding part comes the axial movement of the axial ends of the recess of limit slippage bearing 8, and then the axial fortune of restrictions planetary gear 7 It is dynamic；The xial feed of planetary gear 7 is transferred in the radially protruding part of planetary gear shaft 6 through the recess of sliding bearing 8, Jin Erchuan It is handed on planet stent 5；Meanwhile sliding bearing 8 is set in planetary gear shaft 6, the radial load of planetary gear 7 is through sliding axle 8 are held to be transferred in planetary gear shaft 6 and planet stent 5.That is, the both conducts of the outside wall surface of the radially protruding part of planetary gear shaft 6 The bearing plane of 7 xial feed of planetary gear, and the bearing plane as 7 radial load of planetary gear then need to only consolidate sliding bearing 8 It is scheduled on planetary gear 7, it will be able to realize and the axially and radially motion range of planetary gear 7 is limited, to reduce speed changer Axial dimension and weight, reduce manufacture and the installation cost of speed changer.

As the first preferred embodiment, as shown in figure 9, the radially protruding part of planetary gear shaft 6 is the second taper The diameter of protrusion 61, the second tapered protrusion 61 is gradually increased from its axial both ends to centre, axial outside wall surface limitation recess Axial ends axial movement.

It is further preferred that corresponding to the second tapered protrusion 61, sliding bearing 8 is the 4th circular cone 84, the 4th circular cone 84 are fixed on planetary gear 7, and the 4th circular cone 84 of two of two sliding bearings 8 is oppositely arranged, two the 4th tapers The diameter of block 84 is gradually increased from close to mutual part to mutual position is located remotely from, and two the 4th circular cones are formed and the The conical indentation that two tapered protrusions 61 match.Planetary gear 7 with sliding bearing 8 axially have movement when, due to second Tapered protrusion 61 is located in this recess, then the axial outside wall surface of the second tapered protrusion 61 will stop the axis of two the 4th circular cones 84 To movement, the axial movement of planetary gear 7 is limited to realize.

As deformation, the radially protruding part of planetary gear shaft 6 can also be other shapes, such as arc or sector etc. Deng.The radially protruding part of planetary gear shaft 6 is only needed to close with the recesses that two sliding bearings 8 are formed, the diameter of planetary gear shaft 6 It is capable of the axial movement of the recess of limit slippage bearing 8 to protruding portion, realization limits i.e. the axial movement of planetary gear 7 It can.

As another preferred embodiment, the protruding portion of planetary gear shaft 6 includes third axially position portion and molding Third radial extension on third axially position portion both ends；The axial outside wall surface limitation recess of third radial extension The axial movement of axial ends.

The planetary gear shaft 6 of this structure, two third radial extensions are primarily subjected to as 7 xial feed of planetary gear Face, third axially position are primarily subjected to face as 7 radial load of planetary gear, this radially protruding part is located at two sliding bearings In 8 recess formed, two third radial extensions limit the axial movement of this recess.

It is further preferred that sliding bearing 8 includes the 4th axially position portion and is arranged in the 4th of the 4th axially position portion Two the 4th axially position portions of radial extension, two sliding bearings 8 are matched with third axially position portion, it is ensured that planet tooth The normal rotation of wheel 7, avoids stuck phenomenon occur in 7 rotation process of planetary gear；Meanwhile the 4th radial extension and third Radial extension matches, so that a third radial extension limits the axial movement of the 4th radial extension, thus Realization is defined the axial movement of planetary gear 7.

More preferably preferably, the 4th axially position portion and third axially position portion are cylindrical block, the 4th radial extension It is the 5th circular cone with third radial extension, the diameter of the 5th circular cone of two sliding bearings 8 is from close to mutual portion Position is gradually increased away from mutual position, and the diameter of the 5th circular cone of planetary gear shaft 6 is from close to mutual position It is gradually reduced away from mutual position, to be matched with the 4th radial extension of sliding bearing 8.

As deformation, the 5th above-mentioned circular cone may be replaced by arc block, such as spherical arc block or existing Other shapes in technology, the shape of third radial extension and the 4th radial extension can be with inconsistent, such as one is Circular cone, another is arc block, and third radial extension is only needed to match with the 4th radial extension, so that planetary gear shaft Radially protruding part limit slippage bearing 8 recess axial movement, concrete shape is depending on particular condition in use.

The first circular cone being related in aforementioned four embodiment, the second circular cone, third circular cone 83, the 4th taper The angle of the semi-cone angle a of block 84 and the 5th circular cone be greater than 0 degree and less than 90 degree, such as 10 °, 15 °, 20 °, 28 °, 30 °, 45 °, 65 °, 80 °, 85 ° etc., during actual use, it can be realized by changing the size of semi-cone angle a to sliding bearing 8 xial feeds born and the ratio of radial load are adjusted.For example, when sliding bearing 8 is fixed in planetary gear shaft 6, The semi-cone angle a of the circular cone of sliding bearing 8 is 15 °, to improve the xial feed that the sliding bearing 8 is born, then by circular cone Semi-cone angle a increases to 30 °, so that the xial feed that sliding bearing 8 is able to bear increases, but relatively sliding bearing 8 can be held The radial load received is reduced.That is, being born by the size for the semi-cone angle a for reasonably designing circular cone to coordinate sliding bearing 8 Xial feed and radial load, make sliding bearing 8 bear xial feed and being optimal of radial load.

The half of the first above-mentioned circular cone, the second circular cone, third circular cone 83, the 4th circular cone and the 5th circular cone The angle of cone angle a can be identical, can not also be identical, the size of specific angle, depending on particular condition in use.

Furthermore it is also possible to pass through the axial direction of the first axis positioning region 82 or the 4th axially position portion that change sliding bearing 8 Length, to adjust the radial load of the receiving of sliding bearing 8 and the ratio of xial feed.For example, the first axis of sliding bearing 8 is fixed The length in position portion 82 is longer, then its radial load for being able to bear is bigger, and the xial feed being relatively able to bear is relatively smaller, But by the axial length of the first axis positioning region 82 of reasonable design sliding bearing 8 or the 4th axially position portion 84, to adjust The xial feed and radial load that whole sliding bearing 8 is born optimize.

Sliding bearing 8 in aforementioned four embodiment can have several tile fragments, several tile fragments are around planetary gear shaft 6 Radially-outer surface circumference setting, or around 7 sets internal surface of hole of planetary gear circumference setting, accordingly several tile fragments are formed Above-mentioned first axis positioning region 82 and the first radial extension 81 or third circular cone 83 or the 4th circular cone 84 or the 4th Axially position portion and the 4th radial extension.There are gap between adjacent two tile fragment, this gap can reduce the use of sliding bearing 8 Temperature rise in the process also reduces the consumptive material of sliding bearing 8, can also increase circulation of the lubricating oil in this gap.As change Shape, above-mentioned sliding bearing 8 or an integral blocks, are easily installed.

In aforementioned four embodiment, preferably, sliding bearing 8 is mounted on planetary gear shaft 6 using interference fit On radially-outer surface or on the set internal surface of hole of planetary gear 7 or other fixed forms in the prior art, such as bolt group Part or screw.As deformation, sliding bearing 8 can also be on the radially-outer surface of planetary gear shaft 6 or in 7 sets of holes of planetary gear It is formed on surface by coated alloy material for sliding bearing.The preferred lead-free alloy of the material of sliding bearing 8 has sliding bearing 8 There are good wearability and friction compliance or other alloy materials in the prior art.It more preferably, can also be in sliding axle It holds and coats adjustment layer on 8 radially-outer surface, further increase the wearability of sliding bearing 8.

Embodiment 5

Planetary transmission provided in this embodiment, as shown in Figure 4, Figure 5 and Figure 6, in embodiment 1 or embodiment 2, It further include shape between the radially-outer surface of sliding bearing 8 and the set internal surface of hole of planetary gear 7 or on the basis of embodiment 3 At the first oil clearance 91.

It is put into lubricating oil in the first oil clearance 91, when planetary gear 7 rotates, due to the revolving speed phase of planetary gear 7 For planetary gear shaft 6 revolving speed faster, planetary gear 7 is rotated with lubricating oil, thus in the first oil clearance Effective dynamic pressure oil film is formed in 91, so that the set internal surface of hole of radially-outer surface and planetary gear 7 to sliding bearing 8 plays Lubrication and protective effect also reduce the frictional force being subject in 7 rotation process of planetary gear；In addition, in the first oil clearance 91 Lubricating oil is capable of the xial feed face of receiving planetary gear 7 to sliding bearing 8 and radial load face is lubricated, thus to cunning Dynamic bearing 8 plays a protective role.In addition, axial end face is in free end in 7 rotation process of entire planetary gear, so that row Wear phenomenon will not occur for the axial end face of star gear, improve the service life of planetary gear 7.

Preferably, the first oil clearance 91 is formed in the radially protruding part of planetary gear 7 and the recess of sliding bearing 8 Inner wall between space.

It is further preferred that above-mentioned planetary transmission further includes

Oil distribution ring 22, top are connected to cabinet 1, and bottom is connected to planet stent 5；

First oil dispersing device, for extraneous lubricating oil to be delivered in the first oil clearance 91.

As the preferred embodiment of oil distribution ring 22, oil distribution ring 22 includes downward opening first concave part, and is opened Mouth the second concave part upward is fixed on cabinet 1 at the top of the first concave part, and the bottom of the second concave part is fixed on planet branch On frame 5, the opening of the second concave part is rotatably mounted in the opening of the first concave part, and two concave parts formed it is above-mentioned Second oily channel 11.Since cabinet 1 remains static, and planet stent 5 is in rotary state, passes through the oil distribution ring of setting 22 are connected in the first of cabinet 1 the oily channel 10 with the third oil channel 12 of planet stent 5, while not influencing planet stent 5 just Often rotation.

As the preferred of the first oil dispersing device, as shown in Figure 4 and Figure 5, the first oil dispersing device includes

First oily channel 10, is provided on cabinet 1, is connected to extraneous lubricating oil；

Second oily channel 11, is provided on oil distribution ring 22, is connected to the first oily channel 10；

Third oil channel 12, is provided on planet stent 5, is connected to the second oily channel 11；

4th oily channel 13, is provided in planetary gear shaft 6, and axially extend, is connected to third oil channel；

At least two the 5th oily channels 14, be successively provided in planetary gear shaft 6 and sliding bearing 8 on, and radially prolong It stretches, one end is connected to the 4th oily channel 13, and the other end is connected to the first oil clearance 91.

First oil dispersing device of this structure, when needing to lubricating oil is added in the first oil clearance 91, extraneous lubrication In the oily channel 10 of oil injection first under pressure, then successively the oily channel 11 of inflow second, the 12, the 4th oil of third oil channel are logical Road 13 and the 5th oily channel 14, finally enter in the first oil clearance 91, form forced feed lubrication mode；Planetary gear 7 later Rotation can form effective dynamic pressure oil film effect with the lubricant movement in the first oil clearance 91 in the first oil clearance 91 It answers, it is not necessary that under ambient pressure effect, lubricating oil can be rotated in the first oil clearance 91 with planetary gear 7, thus right The inner wall of the recess of the entire set internal surface of hole and sliding bearing 8 of planetary gear 7 is lubricated, and is reduced and is even avoided its mill Damage.

As deformation, the first oil dispersing device can also be other fuellers in the prior art, need to only lubricate the external world Oil is delivered in the first oil clearance 91.

It is further preferred that the first oil dispersing device further includes oil distribution slot 15, it is provided with the radially-outer surface of sliding bearing 8 On, and axially extend, it is connected to the 5th oily channel 14.The oil distribution slot 15 of setting, so that flowed into through the 5th oily channel 14 Lubricating oil, which is introduced into oil distribution slot 15, to be entered back into the first oil clearance 91, and lubricating oil is spreaded more evenly across In one oil clearance 91.

It further include lasso 16 as preferred embodiment, lasso 16 is set in planetary gear shaft 6, and is located at two Between sliding bearing 8, both ends form gap with the axial end face of two sliding bearings 8 respectively, and this gap is convenient for the first oil film Lubricating oil in gap 91 enters between two sliding bearings 8 in gap, is lubricated to the axial end face of sliding bearing 8, together When the lasso 16 that is arranged be convenient for the positioning when installing two sliding bearings 8 and planetary gear 7.

As the deformation of lasso 16, convex shoulder can also be set on the axial end face of two sliding bearings 8, two convex shoulders it Between there is oil-gap；Or radial protrusion is formed in the gap location of planetary gear 7 being located between two sliding bearings 8, This radial protrusion is located at the gap location between two sliding bearings 8；Or it is not provided with lasso 16, convex shoulder or radial protrusion, directly When two sliding bearings 8 are fixed in planetary gear shaft 6, there is oil-gap between two sliding bearings 8.

It is further preferred that further including the second oil scraper ring 21, it is arranged on the axial end face of planetary gear 7, or sliding On the axial end face of bearing 8, and close to the end of the first oil clearance 91, increase the lubricating oil warp in the first oil clearance 9 The resistance leaked out outside this gap, it is ensured that retain a certain amount of lubricating oil in the first oil clearance 91.

As preferred embodiment, above-mentioned planet stent 5 includes first support 51 and second support 52；Planetary gear One end of axis 6 is fixed in first support 51, and the other end is fixed in second support 52；Second oily channel 11 is provided with second On frame 52.

It is further preferred that above-mentioned speed changer further includes the second oil dispersing device, in the oil sump for will be arranged on cabinet 1 Lubricating oil be delivered in the first oil clearance 91.

Preferably, the second oil dispersing device includes

First oilhole 17, is provided in first support 51, and one end can be connected to the oil sump being arranged on cabinet 1；

Second oilhole 18, is provided in planetary gear shaft 6, axially extends, and is connected to the first oilhole 17；

Third oilhole 19 is provided in planetary gear shaft 6, radially extends, the gap between adjacent sliding bearing 8 Place, one end are connected to the second oilhole 18, and the other end is connected to the first oil clearance 91.

The oil dispersing device of this structure turns to planet stent 5 and to be arranged on cabinet 1 in 7 rotation process of planetary gear When oil sump, the lubricating oil in oil sump enters the first oilhole 17, and is flowed into the first oil film through the second oilhole 18 and third oilhole 19 In gap 91, flooding system lubrication mode is formed.

It is further preferred that the second oil dispersing device further includes first through hole, it is provided on lasso 16, by the first oil clearance 91 are connected to third oilhole 19.

More preferably preferably, the second oil dispersing device further includes the first oil scraper ring 20, and close the first of the second oilhole 18 is arranged in On the end face of bracket 51.The lubricating oil entered in the second oilhole 18 leakage is prevented, the resistance of lubricating oil leakage is increased.

As deformation, such as Fig. 7 and Fig. 8, in two sliding bearings 8, a sliding bearing 8 only includes the first radial extension 81, when another sliding bearing 8 includes first axis positioning region 82 and the first radial extension 81, above-mentioned third oilhole 19 can To open up on the annular groove that the middle part of the first axis positioning region 82 of this another sliding bearing 8 opens up, so that the Two oilholes 18 are connected to the first oil clearance 91.

Embodiment 6

Planetary transmission provided in this embodiment, on the basis of embodiment 4, as shown in figure 9, further including sliding axle It holds and forms the second oil clearance 92 between 8 inner radial surface and the radially-outer surface of planetary gear shaft 6.

Lubricating oil is set in the second oil clearance 92, since the speed of the rotation of planetary gear 7 is relative to planetary gear shaft 6 Revolving speed faster, can be with the lubricant movement in the second oil clearance 92, in the second oil film in 7 rotation process of planetary gear Effective dynamic pressure oil film is formed in gap 92, thus the radial appearance of inner radial surface and planetary gear shaft 6 to sliding bearing 8 Lubrication and protective effect are played in face, also reduce sliding bearing 8 with the frictional force being subject in 7 rotation process of planetary gear；In addition, The xial feed of the receiving planetary gear 7 of planetary gear shaft 6 and sliding bearing 8 and the bearing plane of radial load, can be moistened Oil lubrication, to reduce abrasion；In addition, axial end face is in free end, then goes in 7 rotation process of entire planetary gear Wear phenomenon will not occur for the axial end face of star gear 7, improve the service life of planetary gear 7.

Preferably, the second oil clearance 92 be formed in sliding bearing 8 recess and planetary gear shaft 6 radially protruding part it Between space.

Similar to embodiment 5, above-mentioned speed changer further include oil distribution ring 22, the first oil dispersing device, the second oil dispersing device, Oil distribution slot 15, lasso 16, the first oil scraper ring 20, the second oil scraper ring 21, the distribution rings provided in structure and embodiment 3, the One oil dispersing device, oil distribution slot 15, the second oil dispersing device, lasso 16, the first oil scraper ring 20, the structure of the second oil scraper ring 21 are basic It is identical, it the difference is that only following several respects:

The oily channel 14 of the 5th of (1) first oil dispersing device is provided in planetary gear shaft 6；

(2) oil distribution slot 15 is provided on 6 radially-outer surface of planetary gear shaft；

(3) second oil scraper rings 21 are arranged on the axial end face of planetary gear shaft 6 or on the axial end face of sliding bearing 8；

(4) lasso 16 is fixed on the set internal surface of hole of planetary gear 7.

In addition, two second steps 63 are opposite as shown in figure 9, the both ends of planetary gear shaft 6 have second step 63, and Towards 8 side of sliding bearing, the step surface of two second steps 63 axial direction with the radially protruding part of planetary gear shaft 6 respectively Both ends connection, and be aligned respectively with the axial outside wall surface of a sliding bearing 8, so that second step 63 and sliding bearing 8 Spacing between axial outside wall surface is less than the width of the second oil clearance 92, this second step 63 is used as oil scraper ring, so that second The bore of the both ends outlet of oil clearance 92 is small, increases the resistance of lubricating oil leakage in the second oil clearance 92；Meanwhile it installing When sliding bearing 8, this second step 63 plays positioning action.

In addition, it is necessary to illustrate, " diameter " being related in above-described embodiment is referred both to along 6 radial direction side of planetary gear shaft The actual (real) thickness of this upward component.For example, as shown in figure 4, two the second circular cone diameters from close to mutual position towards remote Be gradually reduced from mutual position, refer to the radial actual (real) thickness of two the second circular cones from close to mutual position away from Mutual position is gradually reduced, the diameter without referring to the second circular cone inner hole centered on the axis of planetary gear shaft 6.

For another example, the diameter of two the first circular cones is gradually increased from close to mutual position away from mutual position, Refer to that the radial actual (real) thickness of two the first circular cones is gradually increased from close to mutual position away from mutual position.

For another example, the diameter of the first tapered protrusion 73 is gradually increased from its axial both ends to centre, refers to the first tapered protrusion 73 radial actual (real) thickness is gradually increased from its axial both ends to centre.For another example, in Fig. 9 two the 4th circular cones 84 diameter It is gradually increased from close to mutual part to mutual position is located remotely from, refers to the radial practical thick of two the 4th circular cones 84 Degree is gradually increased from close to mutual part to mutual position is located remotely from.

It should also be noted that, " cooperation " term being related in above-described embodiment, refers to exist between two components and close Make relationship, and not there is inevitable assembly or fixed relationship between two components；For example, being set in planet tooth side by side along axial direction Two sliding bearings 8 on wheel shaft 6 axially engage to form radial recess, only say there is cooperation between two sliding bearings 8 Relationship forms above-mentioned recess, there are inevitable assembly or fixed relationship, two cunnings between two sliding bearings 8 without referring to There may be one end of gap or a sliding bearing 8 to be set on one end of another sliding bearing 8 between dynamic bearing 8, It or is contact relation between two sliding bearings 8；Or there may also be assembly relations etc. between two sliding bearings 8 Deng.For another example, it is matched between first axis positioning region 82 and the second axially position portion 72, the first radial extension 81 and the second diameter It cooperates, refers under this cooperative relationship between extension 71, recess passes through the radially protruding part of restrictions planetary gear 7 Carry out the axial movement of restrictions planetary gear 7, there is no solid between first axis positioning region 82 and the second axially position portion 72 Determine connection relationship, there is no be fixedly connected with relationship between the first radial extension 81 and the second radial extension 71.

Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes still within the protection scope of the invention.

Claims

1. a kind of planetary transmission, including

Cabinet (1),

Ring gear (4) is fixed on the cabinet (1) inner wall；

Transmission shaft (2) coaxially with the ring gear (4) is rotatably arranged on the cabinet (1), defeated as power Outlet；

Sun gear (3) is fixed on the transmission shaft (2)；

Planet stent (5) is rotatably arranged on the cabinet (1), as power intake；

Planetary gear shaft (6), at least one, axis and the axis of the transmission shaft (2) are fixed on the row in parallel On prong frame (5)；

Planetary gear (7) is rotatably sleeved on each planetary gear shaft (6), and it is inside to be located at the ring gear (4) diameter Portion and the sun gear (3) radially outer, and engaged respectively with the ring gear (4) and the sun gear (3)；

It is characterized in that, further including

Sliding bearing (8) is at least two, is set in side by side on the planetary gear shaft (6) along axial direction, is located at the planet tooth Between wheel shaft (6) and the planetary gear (7), two sliding bearings (8) axially engage to form radial recess；

The sliding bearing (8) is fixed on planetary gear shaft (6) and/or the axial outside wall surface of the sliding bearing (8) is fixed On the planet stent (5), and set internal surface of hole of the recess towards the planetary gear (7), the planetary gear (7) Set internal surface of hole be equipped with the radially protruding part for being suitable for being embedded in the recess, and limited by the axial ends of the recess axial The range of movement；Or

The sliding bearing (8) is fixed on the planetary gear (7), and the recess is towards the planetary gear shaft (6) Radially-outer surface, the radially-outer surface of the planetary gear shaft (6) are equipped with the radially protruding part for being suitable for being embedded in the recess, institute State planetary gear shaft (6) radially protruding part limit the recess axial ends axial movement.

2. planetary transmission according to claim 1, it is characterised in that: be set in the planet tooth side by side along axial direction In two sliding bearings (8) on wheel shaft (6), each sliding bearing (8) includes first axis positioning region (82) and setting The first radial extension (81) in first axis positioning region (82) end；

The first axis positioning region (82) is fixed on the planetary gear shaft (6) and/or first radial extension (81) axial outside wall surface is fixed on the planet stent (5)；

The axial inner wall of two first radial extensions (81) limits the axial movement of the planetary gear (7).

3. planetary transmission according to claim 1, it is characterised in that: be set in the planet tooth side by side along axial direction In two sliding bearings (8) on wheel shaft (6),

One sliding bearing (8) includes first axis positioning region (82) and is arranged in first axis positioning region (82) end First radial extension (81), another described sliding bearing (8) include the separate institute with the first axis positioning region (82) State first radial extension (81) of the one end fits of the first radial extension (81)；

4. planetary transmission according to claim 2 or 3, it is characterised in that: first radial extension (81) For the first circular cone or the first arc block, two the first circular cones or two the first arc blocks of two sliding bearings (8) Be oppositely arranged, the diameter of two first circular cones or two first arc blocks from close to mutual position away from Mutual position is gradually increased.

5. planetary transmission according to claim 2 or 3, it is characterised in that: the radial direction of the planetary gear (7) is prominent Portion includes that the second axially position portion (72) and the second radial direction being molded on second axially position portion (72) both ends are prolonged out Extending portion (71)；

Second axially position portion (72) is matched with the first axis positioning region (82) of sliding bearing (8)；Described Two radial extensions (71) are matched with first radial extension (81).

6. planetary transmission according to claim 5, it is characterised in that: second axially position portion (72) and/ Or the first axis positioning region (82) is cylindrical block；Second radial extension (71) is the second circular cone or the second arc Shape block；

Two second circular cones or the diameter of two second arc blocks from close to mutual position away from each other Position be gradually reduced.

7. planetary transmission according to claim 1, it is characterised in that: be set in the planet tooth side by side along axial direction In two sliding bearings (8) on wheel shaft (6), each sliding bearing (8) is third circular cone (83), the third taper Block (83) is fixed on the planetary gear shaft (6)；

The diameter of two third circular cones (83) is gradually increased from close to mutual part to mutual position is located remotely from, The axial inner wall of two third circular cones (83) limits the axial movement of the planetary gear (7).

8. planetary transmission according to claim 7, it is characterised in that: the planetary gear (7) it is radially projecting Portion is the first tapered protrusion (73)；

The diameter of first tapered protrusion (73) is gradually increased from its axial both ends to centre, two third circular cones (83) axial inner wall limits the axial movement of first tapered protrusion (73).

9. planetary transmission according to claim 2 or 3, it is characterised in that:

One end of the planetary gear shaft (6) has the first step (62) towards the sliding bearing (8) side, close to described The axial outside wall surface of the sliding bearing (8) of first step (62) is resisted against on the first step (62).

10. planetary transmission according to claim 9, it is characterised in that: two of two sliding bearings (8) The first axis positioning region (82) is fixed on the planetary gear shaft (6), the cunning close to the first step (62) The axial outside wall surface of the first radial extension (81) of dynamic bearing (8) is resisted against on the first step (62)；And/or

The axial outside wall surface of the first radial extension (81) of the sliding bearing (8) far from the first step (62) is fixed On the planet stent (5).

11. planetary transmission according to claim 9, it is characterised in that: two of two sliding bearings (8) The axial outside wall surface of first radial extension (81) is fixed on the planet stent (5), close to the first step (62) the axial outside wall surface of the first axis positioning region (82) of the sliding bearing (8) is resisted against the first step (62) On.

12. planetary transmission according to claim 9, it is characterised in that: in two sliding bearings (8), one The axial outside wall surface of the first radial extension (81) of a sliding bearing (8) is fixed on the planet stent (5)；

The first axis positioning region (82) of another sliding bearing (8) is fixed on the planetary gear shaft (6), and the institute The axial outside wall surface for stating the first radial extension (81) of sliding bearing (8) is resisted against on the first step (62).

13. planetary transmission according to claim 7 or 8, it is characterised in that: the one of the planetary gear shaft (6) The first step (62) having towards the sliding bearing (8) side is held, the third close to the first step (62) is bored The axial outside wall surface of shape block (83) is resisted against on the first step (62).

14. planetary transmission according to claim 1, it is characterised in that: be set in the planet side by side along axial direction In two sliding bearings (8) on gear shaft (6), each sliding bearing (8) is fixed on the planetary gear (7)；

The radially protruding part of the planetary gear shaft (6) be the second tapered protrusion (61), second tapered protrusion (61) it is straight Diameter is gradually increased from its axial both ends to centre, and axial outside wall surface limits the axial movement of the recess.

15. planetary transmission according to claim 14, it is characterised in that: the sliding bearing (8) is the 4th cone Two the 4th circular cones (84) of shape block (84), two sliding bearings (8) are oppositely arranged, two the 4th tapers The diameter of block (84) is gradually increased from close to mutual part to mutual position is located remotely from.

16. planetary transmission according to claim 1, it is characterised in that: be set in the planet side by side along axial direction In two sliding bearings (8) on gear shaft (6), each sliding bearing (8) is fixed on the planetary gear (7)；Row The protruding portion of star gear shaft (6) includes third axially position portion and the third that is molded on third axially position portion both ends Radial extension；The axial outside wall surface of the third radial extension limits the axial movement of the recess.

17. planetary transmission according to claim 16, it is characterised in that: the sliding bearing (8) includes the 4th Axially position portion and the 4th radial extension being arranged on the 4th axially position portion end, two sliding bearings (8) Two the 4th axially position portions are matched with third axially position portion, the 4th radial extension and third radial extension phase Cooperation.

18. planetary transmission according to claim 17, it is characterised in that:

4th axially position portion and/or third axially position portion are cylindrical block, and the 4th radial extension and/or third are radially prolonged Extending portion is the 5th circular cone；

The diameter of 5th circular cone of two sliding bearings (8) from close to mutual position away from mutual position by Cumulative big, the diameter of the 5th circular cone of the planetary gear shaft (6) is from close mutual position away from mutual position It is gradually reduced.

19. planetary transmission according to claim 4, it is characterised in that: the semi-cone angle (a) of first circular cone Angle be greater than 0 degree and less than 90 degree.

20. planetary transmission according to claim 6, which is characterized in that the angle of the semi-cone angle (a) of the second circular cone Degree is greater than 0 degree and less than 90 degree.

21. planetary transmission according to claim 7 or 8, which is characterized in that the half of the third circular cone (83) The angle of cone angle (a) is greater than 0 degree and less than 90 degree.

22. planetary transmission according to claim 15, which is characterized in that the semi-cone angle of the 4th circular cone (84) (a) angle is greater than 0 degree and less than 90 degree.

23. planetary transmission according to claim 18, which is characterized in that the semi-cone angle of the 5th circular cone (84) (a) angle is greater than 0 degree and less than 90 degree.

24. planetary transmission according to claim 1, it is characterised in that:

When the sliding bearing (8) is fixed on planetary gear shaft (6) and/or the axial outside wall surface of the sliding bearing (8) is solid When being scheduled on the planet stent (5), in the radially-outer surface of the sliding bearing (8) and the sets of holes of the planetary gear (7) The first oil clearance (91) are formed between surface；Or

When the sliding bearing (8) is fixed on the planetary gear (7), the inner radial surface of the sliding bearing (8) with The second oil clearance (92) are formed between the radially-outer surface of the planetary gear shaft (6).

25. planetary transmission according to claim 24, it is characterised in that: further include

Oil distribution ring (22), top are connected to the cabinet (1), and bottom is connected to the planet stent (5)；

First oil dispersing device, for extraneous lubricating oil to be delivered in first oil clearance (91) or the second oil clearance (92) in.

26. planetary transmission according to claim 25, it is characterised in that: first oil dispersing device includes

First oily channel (10), is provided on the cabinet (1), is connected to extraneous lubricating oil；

Second oily channel (11), is provided on the oil distribution ring (22), is connected to the described first oily channel (10)；

Third oil channel (12) is provided on the planet stent (5), is connected to the described second oily channel (11)；

4th oily channel (13), is provided on the planetary gear shaft (6), and axially extend, with third oil channel (12) it is connected to；

At least two the 5th oily channels (14), are provided on the planetary gear shaft (6) and/or on the sliding bearing (8), and It radially extends, one end is connected to the described 4th oily channel (13), the other end and first oil clearance (91) or the second oil Intermembrane space (92) connection.

27. planetary transmission according to claim 26, it is characterised in that: first oil dispersing device further includes oil Distributing slot (15), is provided on the radially-outer surface of the sliding bearing (8) or the radially-outer surface of the planetary gear shaft (6) On, and axially extend, it is connected to the described 5th oily channel (14).

28. planetary transmission described according to claim 1-3,7-8,14-18, any one of 22-27, feature exist In: further include lasso (16), the lasso (16) is set on planetary gear shaft (6), be located at two sliding bearings (8) it Between, both ends form gap with the axial end face of two sliding bearings (8) respectively.

29. planetary transmission according to claim 26, it is characterised in that: the planet stent (5) includes first Bracket (51) and second support (52)；One end of the planetary gear shaft (6) is fixed on first support (51), and the other end is fixed On second support (52)；Described second oily channel (11) is provided on the second support (52)；Further include

Second oil dispersing device, for the lubricating oil in the oil sump being arranged on the cabinet (1) to be delivered between first oil film In gap (91) or the second oil clearance (92).

30. planetary transmission according to claim 29, it is characterised in that: second oil dispersing device includes

First oilhole (17) is provided on the first support (51), and one end can connect with the oil sump being arranged on the cabinet (1) It is logical；

Second oilhole (18) is provided on the planetary gear shaft (6), axially extends, and is connected to first oilhole (17)；

Third oilhole (19) is provided on the planetary gear shaft (6), radially extends, and is located at the adjacent sliding bearing (8) Between gap location, one end is connected to second oilhole (18), the other end and first oil clearance (91) or the second oil Intermembrane space (92) connection.

31. planetary transmission according to claim 30, it is characterised in that: further include lasso (16), the lasso (16) be set on planetary gear shaft (6), be located between two sliding bearings (8), both ends respectively with two cunnings The axial end face of dynamic bearing (8) forms gap；

Second oil dispersing device further includes first through hole, is provided on the lasso (16), by first oil clearance (91) it is connected to the third oilhole (19).

32. the planetary transmission according to claim 30 or 31, it is characterised in that: second oil dispersing device also wraps It includes the first oil scraper ring (20), is arranged on the end face close to the first support (51) of second oilhole (18).