CN108397543B - Planetary gear support structure and planetary gear mechanism with same - Google Patents
Planetary gear support structure and planetary gear mechanism with same Download PDFInfo
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- CN108397543B CN108397543B CN201810451023.2A CN201810451023A CN108397543B CN 108397543 B CN108397543 B CN 108397543B CN 201810451023 A CN201810451023 A CN 201810451023A CN 108397543 B CN108397543 B CN 108397543B
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- 230000007246 mechanism Effects 0.000 title claims description 46
- 238000009826 distribution Methods 0.000 claims description 14
- 239000013585 weight reducing agent Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 description 16
- 238000005461 lubrication Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000003466 welding Methods 0.000 description 9
- 238000003754 machining Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 239000007769 metal material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000016261 weight loss Diseases 0.000 description 2
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010862 gear shaping Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
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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
- F16H57/08—General details of gearing of gearings with members having orbital motion
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
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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
Abstract
The utility model provides a planetary gear support structure, including the support main part, end cover and outer lane, the support main part includes the supporting part and connects in the connecting portion of supporting part one end, and the outside diameter of supporting part is less than the outside diameter of connecting portion, the supporting part includes first supporting part and second supporting part in order to support planetary gear's one end, be equipped with first hookup location on the lateral wall of connecting portion, the one end opening of keeping away from the supporting part of connecting portion, and be equipped with the second hookup location on the inside wall of open end, the end cover is connected in second hookup location department, and be equipped with third supporting part and fourth supporting part in order to support planetary gear's the other end on the end cover, the outer lane cover is located the support main part, and connect in first hookup location department. According to the planetary gear support structure provided by the invention, one end of the connecting part far away from the supporting part is opened, and the outer diameter of the connecting part is larger than the outer diameter of the supporting part, so that a bowl-shaped structure with a large opening and a small bottom is formed, and the wall thickness of the support main body can be adjusted according to the rigidity requirements of different planetary gears.
Description
Technical Field
The invention relates to the technical field of speed changers, in particular to a planetary gear support structure and a planetary gear mechanism with the same.
Background
In general, an automatic transmission employs a planetary gear mechanism for a gear change function. With the demands for compact, efficient, multiple gear shift of an automatic transmission, a planetary gear mechanism of a ravigneaux structure has been widely used.
However, because the Ravigna gear mechanism is complex, in order to meet the arrangement precision of the gear set and the lubrication requirements of the gear and the bearing by the mechanism, firstly, a planet carrier end cover in the structure adopted by the existing planet gear carrier contained by the mechanism is of an inverted bowl-shaped structure, and in order to ensure that the welding process of a carrier main body and a carrier outer ring is feasible, a disc-shaped structure of the carrier end cover is provided with intermittent annular welding through holes near a planet gear pin hole; meanwhile, in order to ensure that the welding process of the support end cover and the support outer ring is feasible, the bowl part of the support end cover is provided with a flange extending to the outer side of the circumference, so that the wall thickness of the end cover in the circumferential direction is limited, and the rigidity of the bowl-shaped structure of which the support end cover is thin-walled is insufficient.
Secondly, when the planetary gear mechanism of the existing planetary gear support works, a plurality of groups of long planetary gears and short planetary gears can bear larger radial force, the radial force acts on the planetary gear support through needle bearings and pin shafts in inner holes of the planetary gears, the rigidity of the existing planetary gear support structure is poor, larger deformation can be generated when the planetary gear mechanism bears load, the position accuracy of gears in the planetary gear mechanism is affected, gear engagement errors are increased, accordingly, the operation noise of the planetary gear mechanism is large, and the service life of gears is reduced.
Meanwhile, in order to improve the bearing capacity of the planetary gear mechanism and reduce running noise, the conventional planetary gear mechanism also often adopts helical gear group transmission, so that a large axial force is generated when the planetary gear mechanism works and acts on the planetary gear bracket, and the axial force acts on the planetary gear bracket together with the radial force, so that the deformation of the conventional planetary gear bracket is further increased, and the state of teeth in the planetary gear mechanism in work is further worsened.
Furthermore, because the bowl part of the end cover of the planet carrier is also provided with the flange extending to the outer side of the circumference, the spline arranged on the outer circumference surface of the end cover of the existing carrier can be formed only through the machining process with low efficiency such as gear shaping, and meanwhile, because the side wall of the circumferential direction of the end cover of the existing carrier is thinner, the machining efficiency meeting the precision requirement is further reduced, and the machining cost is high.
Disclosure of Invention
In view of this, it is necessary to provide a high-strength and low-cost planetary gear carrier structure and a planetary gear mechanism having the same.
The invention provides a planetary gear support structure, which comprises a support body, an end cover and an outer ring, wherein the support body comprises a support part and a connecting part connected to one end of the support part, the outer diameter of the support part is smaller than that of the connecting part, the support part comprises a first support part and a second support part for respectively supporting one ends of a long planetary gear and a short planetary gear, a first connecting position is arranged on the outer side wall of the connecting part, which is close to one end of the support part, one end of the connecting part, which is far away from the support part, is open, a second connecting position is arranged on the inner side wall of the opening end, a fifth connecting position is arranged on one side of the opening end, which is close to the support part, the end cover is connected to the second connecting position, a third support part and a fourth support part are arranged on the end cover for respectively supporting the other ends of the long planetary gear and the short planetary gear, the outer ring is sleeved outside the support body and connected to the first connecting position, a third connecting position and a sixth connecting position corresponding to the first connecting position, a fourth connecting position and a fourth connecting position corresponding to the first connecting position and the fifth connecting position are respectively are arranged on the outer ring, and the outer ring is matched with the fifth connecting position.
Further, the first supporting part and the second supporting part are respectively a plurality of parts which are arranged at intervals along the circumferential direction and far away from the bottom of the connecting part, the second supporting part extends towards the direction of the connecting part to form a boss shape, the first supporting part and the second supporting part are respectively provided with a first supporting hole and a second supporting hole which are communicated with each other, the first supporting holes and the second supporting Kong Jiaoti are arranged at intervals, the end cover is a disc-shaped member, the third supporting part and the fourth supporting part are formed on the end face of the end cover, the end cover is provided with a third supporting hole and a fourth supporting hole at intervals along the circumferential direction, the first supporting hole corresponds to the third supporting hole, and the second supporting hole corresponds to the fourth supporting hole.
Further, the first supporting portion and the second supporting portion are further provided with a first limiting portion and a second limiting portion respectively, the first limiting portion and the second limiting portion are arranged at the edges of the first supporting hole and the second supporting hole respectively, the third supporting hole and the fourth supporting hole are provided with a third limiting portion and a fourth limiting portion corresponding to the first limiting portion and the second limiting portion respectively, the first limiting portion is matched with the third limiting portion, and the second limiting portion is matched with the fourth limiting portion.
Further, a first weight-reducing groove is further formed in the second supporting portion in a concave manner; the outer ring comprises a matching part, and a second weight reduction groove which is concave is formed in the matching part.
Further, a first oil groove, a first oil hole and a first spline are arranged on the connecting portion, the first oil groove is an annular groove formed on the inner surface of the connecting portion, the first spline is arranged at the opening end of the connecting portion, and the first oil hole penetrates through the side wall of the connecting portion and is communicated with the first oil groove and the first spline; the outer ring further comprises an extension part connected to the other end of the matching part, a plurality of through second oil holes are formed in the outer circumferential surface of the extension part, a second oil groove is formed in the inner circumferential surface of the extension part, the second oil groove is sunken relative to the inner circumferential surface of the extension part, and the second oil holes penetrate through the side wall of the extension part and are communicated with the second oil groove.
Further, first yielding holes are formed in the first supporting portion and the second supporting portion of the support body, the central axes of the first yielding holes are respectively overlapped with the central axes of one side arc surfaces of the first supporting portion and the adjacent two second supporting portions, and the sizes of the first yielding holes can be adjusted according to different diameters and different center distances of the planetary gears; the end cover further comprises a second abdication hole, and the second abdication hole is arranged on the central axis of the end cover.
The invention also relates to a planetary gear mechanism which comprises the planetary gear support structure, a long planetary gear, a short planetary gear, a big sun gear, a small sun gear, a planetary gear ring and an input shaft, wherein the big sun gear and the small sun gear are arranged on the input shaft, and the big sun gear and the small sun gear can rotate relatively; the long planet gears are arranged in the support main body and are arranged between a first supporting part and a third supporting part along the circumferential direction of the planet gear support structure, the long planet gears are meshed with the big sun gear, the short planet gears are arranged in the support main body and are arranged between a second supporting part and a fourth supporting part along the circumferential direction of the planet gear support structure, and the short planet gears are meshed with the small sun gear; the planetary gear ring is sleeved between the support main body and the outer ring and meshed with the long planetary gear; the plurality of long planetary gears are in one-to-one corresponding engagement with the plurality of short planetary gears.
Further, the planetary gear mechanism comprises a first gear pin shaft and a second gear pin shaft, the long planetary gear is arranged on the first gear pin shaft, two ends of the first gear pin shaft are respectively positioned between the first supporting hole and the third supporting hole, and the long planetary gear is axially limited between the first limiting part and the third limiting part; the short planetary gear is arranged on the second gear pin shaft, two ends of the second gear pin shaft are respectively positioned between the second supporting hole and the fourth supporting hole on the end cover, and the axial limit is positioned between the second limit part and the fourth limit part.
Further, an oil distribution plate is further arranged on the outer end face of the end cover of the planetary gear support structure, a plurality of axially extending hollow oil distribution pipes are distributed in the circumferential direction near one end of the planetary gear support structure, oil holes are formed in the first gear pin shaft and the second gear pin shaft respectively, the oil distribution pipes extend into the oil holes of the first gear pin shaft and the second gear pin shaft respectively, and an oil collecting ring is arranged at the other end of the oil distribution plate.
Further, the planetary gear mechanism further comprises a first multi-plate brake, a first multi-plate clutch, a one-way clutch, a second multi-plate brake, a second multi-plate clutch and a third multi-plate clutch, wherein a first spline is arranged on the support body of the planetary gear support structure, the first spline is arranged at the opening end of the connecting portion, a second spline is arranged on the outer ring of the planetary gear support structure, the second spline is formed on the outer circumferential surface of one end of the matching portion of the outer ring, the outer ring further comprises an extension portion connected to the other end of the matching portion, friction plate splines of the first multi-plate clutch and the first multi-plate brake are respectively connected with the first spline of the support body and the second spline of the outer ring, the one-way clutch is arranged on the outer circumferential surface of the extension portion of the outer ring, the large sun gear is respectively connected to the second multi-plate brake and the second multi-plate clutch, and the small sun gear is connected to the third multi-plate clutch.
According to the planetary gear support structure, one end of the support main body far away from the connecting part is opened, the outer side diameter of the support main body is larger than the outer side diameter of the supporting part, so that a bowl-shaped structure with a large opening and a small bottom is formed, the thickness of the wall part of the support main body is not limited, and the support main body can be adjusted according to the rigidity requirements of different planetary gears; the end cover is not required to be provided with a welding process hole, so that the rigidity and the precision of the main body structure of the bracket are improved, and the process of one-step preforming is facilitated, and the processing cost is reduced; the end cover is embedded in the bracket main body to form a planetary gear bracket structure with a high-strength cage structure, and the spline of the bracket main body is formed on the outer circumference of the wall part without other redundant structures, so that the bracket main body and the outer ring can adopt a high-precision process in processing, and the high precision of positioning of the meshing gear set is ensured while deformation is reduced; the size of the first yielding hole of the planetary gear support structure can be adjusted according to different diameters and different center distances of the planetary gears, so that the requirements of different planetary gear support types can be met conveniently.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a planetary gear carrier according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the stent body of FIG. 1;
fig. 3 is a perspective view of the bracket body of fig. 1;
FIG. 4 is a schematic cross-sectional view of the end cap of FIG. 1;
FIG. 5 is a schematic perspective view of the end cap of FIG. 1;
FIG. 6 is a schematic cross-sectional view of the outer race of FIG. 1;
FIG. 7 is a schematic perspective view of the outer race of FIG. 1;
fig. 8 is a cross-sectional view of the planetary gear mechanism in the present embodiment.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description of the present invention is given with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1, the present invention provides a planetary gear carrier structure 100a including a carrier body 1, an end cap 2, and an outer ring 3.
Referring to fig. 1 to 4, the bracket body 1 includes a supporting portion 10 and a connecting portion 15 connected to one end of the supporting portion 10, wherein the outer diameter of the supporting portion 10 is smaller than the outer diameter of the connecting portion 15, the supporting portion 10 includes a first supporting portion 11 and a second supporting portion 12 for respectively supporting one ends of the long planetary gear and the short planetary gear, a first connecting position 14W is provided on an outer side wall of the connecting portion 15, one end of the connecting portion 15 far away from the supporting portion 10 is opened, a second connecting position 15W is provided on an inner side wall of the opened end, and a fifth connecting position 13W is provided on a side of the opened end close to the supporting portion 10; the end cover 2 is connected to the second connecting position 15W, and a third supporting part 21 and a fourth supporting part 22 are arranged on the end cover 2 to respectively support the other ends of the long planetary gear and the short planetary gear; the outer ring 3 is sleeved outside the bracket main body 1 and connected to the first connection 14W and is abutted to the fifth connection position 13W.
In the planetary gear support structure 100a provided by the invention, one end of the support main body 1 far away from the support part 10 is opened, the outer diameter of the opening end is larger than that of the support part 10, and a bowl-shaped structure is formed, so that the wall part 15 of the support main body 1 can be not influenced by a welding joint, and the wall parts 15 with different thicknesses are adopted to meet the rigidity of the support main body 1, and the structure is favorable for one-time preforming by adopting a forging process, so that the material strength is improved, and meanwhile, the processing cost is reduced; the bracket main body 1 is forged and machined by adopting a metal material; the end cover 2 is in a disc-shaped structure and is forged and machined by adopting a metal material; the outer ring 3 is cylindrical, and is formed by forging and machining a metal material; the planetary gear support structure comprises a support main body 1, an end cover 2 and an outer ring 3, wherein the support main body 1, the end cover 2 and the outer ring 3 are respectively assembled together through two groups of matched welding seam allowance after being processed and formed, a first connecting position 14W and a second connecting position 15W are annular welding seam allowance, the outer ring 3 is abutted with the support main body 1 through a fifth connecting position 13W, and meanwhile, the end cover 2 and the outer ring 3 are respectively welded with the support main body 1 through the first connecting position 14W and the second connecting position 15W, so that a high-rigidity cage structure is formed, the planetary gear support structure is ensured to keep a small deformation state in the operation process of a large load, and the high precision in positioning of intermeshing gear sets is also ensured, so that the noise and vibration of gear engagement are reduced, and the service life of a gear is prolonged.
In other embodiments, the fixing manner of the end cover 2 and the outer ring 3 with the carrier body 1 is not limited to the ring weld welding in the present embodiment, but may be other fixing manners that can make the planetary gear structure be a cage structure, and is not limited in particular.
As shown in fig. 2 and 3, a plurality of first supporting portions 11 are provided at intervals along the circumferential direction at the bottom of the supporting portion 10 away from the connecting portion 15, and first supporting holes 11a penetrating the first supporting portions 11 are provided; the plurality of second supporting portions 11 are arranged at intervals along the circumferential direction at the bottom of the supporting portion 10 far away from the connecting portion 15, the second supporting portions 12 extend towards the connecting portion 15 to form a boss shape, through second supporting holes 12a are formed in the second supporting portions 12, and the second supporting holes 12a and the first supporting holes 11a are alternately arranged at intervals.
The first support hole 11a is a first long planetary pin support hole, and the second support hole 12a is a first short planetary pin support hole, and the first support hole 11a is closer to the edge of the support portion 10 than the second support hole 12 a. In this embodiment, the first supporting portion 11 and the second supporting portion 12 of the bracket main body 1 are further provided with a first limiting portion 11b and a second limiting portion 12b, the first limiting portion 11b and the second limiting portion 12b are respectively disposed at edges of the first supporting hole 11a and the second supporting hole 12a, the first limiting portion 11b is a first long planetary gear pin riveting slot, and the second limiting portion 12b is a first short planetary gear pin riveting slot.
In this embodiment, the second supporting portion 12 is further provided with a first weight-reducing groove 12c, and the first weight-reducing groove 12c is formed by recessing on the outer side of the second supporting portion 12. The first weight-reduction groove 12c reduces the mass and moment of inertia of the carrier body 1 under the condition of ensuring the overall rigidity of the carrier body 1, so as to reduce the manufacturing cost of the planetary gear carrier and facilitate control of the planetary gear mechanism. In another embodiment, the first weight-reducing slot 12c may not be provided, but does not affect the function of the present planetary gear carrier.
In this embodiment, the first connecting portion 14W is disposed at an end of the connecting portion 15 near the supporting portion 10, and an outer diameter of the first connecting portion 14W is smaller than an outer diameter of an opening end of the connecting portion 15, and the fifth connecting portion 13W forms a circular flange opposite to the first connecting portion 14W.
In this embodiment, the outer sidewall of the connecting portion 15 is further provided with a first spline 15d, and the first spline 15d is disposed at the open end of the connecting portion 15. Since the second connecting position 15W is provided on the inner wall of the connecting portion 15, the connecting portion 15 of the bracket main body 1 provided with the first spline 15d has no flange, so that the first spline 15d can be formed by adopting a high-efficiency and high-precision machining process such as hobbing, thereby improving the machining precision of the bracket main body 1 and reducing the machining cost.
In this embodiment, the connecting portion 15 is further provided with a first oil groove 15a and a first oil hole 15b, the first oil groove 15a is an annular groove formed on the inner surface of the connecting portion 15, and the first oil hole 15b penetrates through the side wall of the connecting portion 15 and communicates with the first oil groove 15a and the first spline 15 d. Specifically, the first oil groove 15a is used for collecting transmission oil scattered by centrifugal action during operation of the planetary gear mechanism, the first spline 15d is used for connecting friction plates of the multiplate clutch, and the first oil hole 15b is used for throwing out the transmission oil collected by the first oil groove 15a by centrifugal force and supplying the friction plates connected with the first spline 15d for lubrication as needed.
In this embodiment, the first support portion 11 and the second support portion 12 of the carrier body 1 are provided with first relief holes 16 to form a space for accommodating rotation of the large sun gear and the small sun gear. Specifically, the central axes of the first abdicating holes 16 are respectively coincident with the central axes of one side arc surfaces of the first supporting part 11 and the two adjacent second supporting parts 12. The size of the first relief hole 16 can be adjusted according to different diameters and different center distances of the planetary gears.
As shown in fig. 4 and 5, in the present embodiment, the end cap 2 is a disk-shaped member and the third and fourth support portions 21, 22 are formed on end surfaces thereof.
The end cover 2 is provided with a third supporting hole 21a and a fourth supporting hole 22a which respectively correspond to the first supporting hole 11a and the second supporting hole 12a along the circumferential direction at intervals, the third supporting hole 21a is a second long planetary gear pin supporting hole, and the fourth supporting hole 22a is a second short planetary gear pin supporting hole. The first supporting holes 11a correspond to the third supporting holes 21a to respectively provide axial support and position the two ends of the long planetary gear pin shaft; the second support holes 12a correspond to the fourth support holes 22a to provide axial support and position the two ends of the stub pinion pin, respectively.
In this embodiment, the edges of the third supporting hole 21a and the fourth supporting hole 22a are respectively provided with a third limiting portion 21b and a fourth limiting portion 22b corresponding to the first limiting portion 11b and the second limiting portion 12b, the third limiting portion 21b is a second long planetary gear pin riveting groove, and the fourth limiting portion 22b is a second short planetary gear pin riveting groove. The first limiting part 11b is matched with the third limiting part 21b to axially limit the assembled and riveted long planetary gear pin shaft; the second limiting part 12b is matched with the fourth limiting part 22b to axially limit the assembled and riveted short planetary gear pin shaft.
In this embodiment, the end cover 2 is provided with a fourth connection position 2W corresponding to the second connection position 15W, and the second connection position 15W is matched with the fourth connection position 2W; specifically, the inner end face of the fourth connecting position 2W abuts on the annular outer end face of the second connecting position 15W of the bracket body 1, and the fourth connecting position 2W is fitted with the second connecting position 15W of the bracket body 1 and is welded so that the end cap 2 is connected to the bracket body 1.
In this embodiment, the end cover 2 is further provided with a second relief hole 2a, the second relief hole 2a is disposed on a central axis of the end cover 2, and the second relief hole 2a forms a rotation space for accommodating the input shaft.
As shown in fig. 6 and 7, the outer ring 3 includes a fitting portion 31, one end of the fitting portion 31 is provided with a flange, a third connecting position 31W corresponding to the first connecting position 14W is provided on the inner side of the flange of the fitting portion 31, and a sixth connecting position 30W corresponding to the fifth connecting position 13W is provided on the fitting portion 31; specifically, the outer end surface of the annular flange of the fifth connecting portion 13W toward the side of the supporting portion 10 abuts on the outer end surface of the side of the sixth connecting portion 30W near the connecting portion 15, while the inner end surface of the third connecting portion 31W abuts on the annular outer end surface of the first connecting portion 14W of the bracket main body 1, and the inner cylindrical surface diameter of the third connecting portion 31W is fitted with the outer cylindrical surface diameter of the first connecting portion 14W of the bracket main body 1 and is welded so that the outer ring 3 is connected with the bracket main body 1.
In this embodiment, the matching portion 31 is provided with a concave second weight-reducing groove 31a, and the first weight-reducing groove 12c and the second weight-reducing groove 31a reduce the mass and moment of inertia thereof under the condition of ensuring the overall rigidity of the carrier outer ring 3, so as to reduce the manufacturing cost of the planetary gear carrier and facilitate control of the planetary gear mechanism. However, the elimination of this structure does not affect the implementation of the present planetary gear carrier function.
In the present embodiment, the second spline 31b is formed on the outer circumferential surface of one end of the fitting portion 31, the second spline 31b being for connecting the friction plates of the multiplate clutch; the outer ring 3 further includes an extension portion 32 connected to one end of the fitting portion 31, and the extension portion 32 is fitted to a one-way clutch mounted on the outer circumferential surface thereof to realize a one-way braking function of the planetary gear carrier.
In this embodiment, the extension 32 may be specifically an inner ring of a one-way clutch. The circumference outer surface of the extension part 32 is provided with a plurality of through second oil holes 32b, the circumference inner surface of the extension part 32 is provided with a second oil groove 32a, and the second oil groove 32a is recessed relative to the circumference inner surface of the extension part 32; the second oil sump 32a serves to collect transmission oil scattered by centrifugal force during operation of the planetary gear mechanism, while the plurality of second oil holes 32b serve to spin out the transmission oil collected by the second oil sump 32a by centrifugal force and supply it as needed for lubricating the one-way clutch mounted on the outer circumferential surface of the extension 32.
As shown in fig. 8, the present invention also relates to a planetary gear mechanism 100b, which includes the above-described planetary gear carrier structure 100a and long planetary gears 401, short planetary gears 402, large sun gear 501, small sun gear 502, input shaft 60, and planetary ring gear 112.
The large sun gear 501 and the small sun gear 502 are mounted on the input shaft 60, and the large sun gear 501 and the small sun gear 502 are rotatable relative to each other. A plurality of long pinion gears 401 are provided in the carrier body 1 and are arranged between the first support portion 11 and the third support portion 21 in the circumferential direction of the pinion carrier structure 100a, and the long pinion gears 401 are engaged with the large sun gear 501, a plurality of short pinion gears 402 are provided in the carrier body 1 and are arranged between the second support portion 12 and the fourth support portion 22 in the circumferential direction of the pinion carrier structure 100a, and the short pinion gears 402 are engaged with the small sun gear 502. The planetary ring gear 112 is fitted between the carrier body 1 and the outer ring 3, and meshes with the long planetary gears 401. The plurality of long planetary gears 401 are in one-to-one correspondence with the plurality of short planetary gears 402. The outer ring 3 forms a space accommodating rotation of the planetary ring gear 112 together with the outer circumferential surfaces of the first support portion 11 and the second support portion 12 of the carrier body 1.
Specifically, the large sun gear 501 and the small sun gear 502 are sequentially sleeved on the input shaft 60 along the axis.
Specifically, the planetary gear mechanism 100b further includes a first gear pin 117a and a second gear pin 117b, where the first gear pin 117a is a long planetary gear pin, and the second gear pin 117b is a short planetary gear pin; in detail, the long planet gear 401 is mounted on the first gear pin 117a through the long planet gear needle bearing 103, the first supporting part 11 and the third supporting part 21 at two ends of the planet gear carrier structure 100a respectively provide axial support for two ends of the long planet gear 401 through the long planet gear gaskets 105 mounted at two ends of the long planet gear 401, the first supporting hole 11a and the third supporting hole 21a at two ends of the planet gear carrier structure 100a respectively support and position two ends of the first gear pin 117a, and the first limiting part 11b and the third limiting part 21b at two ends of the planet gear carrier structure 100a respectively axially limit two ends of the assembled and riveted long planet gear pin 104; the short planetary gear 402 is mounted on the second gear pin 117b through the short planetary gear needle bearing 107, and the second supporting portion 12 and the fourth supporting portion 22 at two ends of the planetary gear carrier structure 100a are configured to provide axial support for two ends of the short planetary gear 402 through the short planetary gear spacer 109 mounted at two ends of the short planetary gear 402, the second supporting hole 12a and the fourth supporting hole 22a at two ends of the planetary gear carrier structure 100a are configured to support and position two ends of the second gear pin 117b, respectively, and the third limiting portion 12b and the fourth limiting portion 22b at two ends of the planetary gear carrier 100a are configured to axially limit two ends of the assembled and riveted short planetary gear pin 108, respectively.
In this embodiment, the outer end surface of the end cover 2 of the planetary gear support structure 100a is further provided with an oil distribution plate 114, a plurality of axially extending hollow oil distribution pipes are distributed in the circumferential direction near one end of the planetary gear support structure 100a, oil holes are respectively formed in the first gear pin 117a and the second gear pin 117b, and the oil distribution pipes respectively extend into the oil holes of the first gear pin 117a and the second gear pin 117 b; the other end of the oil distribution plate 114 is provided with an inverted cone-shaped oil collecting ring which collects transmission oil splashed by centrifugal force of operation of the planetary gear mechanism 100b and lubricates the long planetary gear needle bearing 103 and the short planetary gear needle bearing 107 through oil distribution pipes of the oil distribution plate 114 and oil holes in the centers of the first gear pin 117a and the second gear pin 117b, respectively.
In order to enable the planetary gear mechanism 100b to realize a plurality of sets of speed change functions of different speed ratios, the planetary gear mechanism 100b is further provided with a first multiplate brake 115, a first multiplate clutch 116a and a one-way clutch 116b, and a second multiplate brake (not shown in fig. 8), a second multiplate clutch (not shown in fig. 8), and a third multiplate clutch (not shown in fig. 8).
In this embodiment, the friction plate splines of the first multiplate clutch 116a and the first multiplate brake 115 are respectively connected with the first spline 15d and the second spline 31b on the planetary gear carrier structure 100a, the one-way clutch 116b is mounted on the outer circumferential surface of the extension 32 of the outer race 3 of the planetary gear carrier structure 100a, the large sun gear 501 is connected to the second multiplate clutch and the second multiplate brake, respectively, and the small sun gear 502 is connected to the third multiplate clutch.
In operation, the planetary gear mechanism 100b according to the present invention controls one or both of the second multi-plate brake and the third multi-plate clutch connected to the large sun gear 501 and the small sun gear 502 to be engaged as power input, and simultaneously controls one of the first multi-plate brake 115, the brake connected to the large sun gear 111, and the one-way clutch 116b to be engaged to brake the corresponding member.
That is, in other embodiments, the planetary gear mechanism 100b may output a plurality of different speed ratios through the planetary ring gear 112 by controlling various combinations of clutch and brake engagement to achieve the shifting function of the automatic transmission.
For other technical features of the planetary gear mechanism 100b and the control member, refer to the prior art, and are not described herein.
As shown in fig. 8, in order to ensure that the bearings and gears of the planetary gear mechanism 100b provided by the present invention operate normally, in this embodiment, a lubrication member may be further provided on the planetary gear mechanism 100b or a lubrication structure may be provided on the member.
Because the central axis of the planetary gear support structure 100a provided by the invention is provided with the input shaft 60, the input shaft 60 is internally provided with a first lubrication oil duct extending along the axial direction, a plurality of second lubrication oil ducts which are axially arranged and communicated in the circumferential direction and are connected with the first lubrication oil duct, and corresponding lubrication oil holes on the outer circumferential surface; when the input shaft 60 is operated, transmission oil having a certain pressure flows into the first and second lubrication oil passages, and is thrown out through the lubrication oil holes due to centrifugal action, quantitatively lubricating bearings and gears in the planetary gear mechanism 100 b.
The first oil groove 15a of the planetary gear carrier structure 100a throws out the collected transmission oil splashed out by the operation centrifugal force of the planetary gear mechanism 100b through the first oil holes 15b of the plurality of planetary gear carrier structures 100a and supplies the friction plates and the pair plates that lubricate the first multiplate clutch 116a as needed.
The second oil groove 32a of the planetary carrier structure 100a throws out the collected transmission oil splashed out by the operation centrifugal force of the planetary mechanism 100b through the plurality of second oil holes 32b of the planetary carrier structure 100a and supplies the lubrication one-way clutch 116b as needed.
The planetary gear mechanism 100b described above is applicable to an automatic transmission provided with three or more forward gears. The automatic transmission and the engine form a power assembly, the speed and the torque input by the engine are subjected to speed change and torque change output, meanwhile, a power input source of the automatic transmission is not limited to the engine, and the automatic transmission is also suitable for being connected with a motor alone to form the power assembly or connected with the motor and the engine to form a hybrid power system, and the input speed and torque are subjected to speed change and torque change output.
For other technical features of the planetary gear mechanism 100b, see the prior art, and are not described herein.
According to the planetary gear support structure provided by the invention, one end of the support main body far away from the connecting part is opened, and the outer side diameter of the support main body is larger than the outer side diameter of the supporting part to form a bowl-shaped structure with a large opening and a small bottom, so that the wall thickness of the support main body is not limited and can be adjusted according to the rigidity requirements of different planetary gears; the welding process holes are not required to be arranged on the end cover, so that the rigidity and the precision of the main structure of the bracket are improved, and the process of one-step preforming is facilitated, and the processing cost is reduced; the end cover is embedded in the bracket main body to form a planetary gear bracket structure with a high-strength cage structure, and the spline of the bracket main body is formed on the outer circumference of the wall part without other redundant structures, so that the bracket main body and the outer ring can adopt a high-precision process in processing, and the deformation of the bracket main body and the outer ring is reduced, and the high precision of positioning of the meshing gear set is ensured; the size of the first yielding hole of the planetary gear support structure can be adjusted according to different diameters and different center distances of the planetary gears, so that the requirements of different planetary gear support types can be met conveniently.
The present invention is not limited to the above embodiments, but is capable of modification and variation in all aspects, including those of ordinary skill in the art, without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a planetary gear support structure (100 a), characterized by, including support main part (1), end cover (2) and outer lane (3), support main part (1) include supporting part (10) and connect in connecting portion (15) of supporting part (10) one end, just the outside diameter of supporting part (10) is less than the outside diameter of connecting portion (15), supporting part (10) include first supporting part (11) and second supporting part (12) in order to support the one end of long planetary gear and short planetary gear respectively, be equipped with first connecting position (14W) on the lateral wall that connecting portion (15) are close to one end of supporting part (10), be equipped with second connecting position (15W) on the inside wall of connecting portion (15) be away from one end opening of supporting part (10), one side that the opening end is close to supporting part (10) is equipped with fifth connecting position (13W), end cover (2) are connected in second connecting position (15W) in order to support one end of long planetary gear and short planetary gear respectively, be equipped with on connecting portion (2) and the outer lane (1) are located in order to connect in the other end cover (14) and the one end of long planetary gear respectively, the outer ring (3) is provided with a third connecting position (31W) and a sixth connecting position (30W) which are respectively corresponding to the first connecting position (14W) and the fifth connecting position (13W), the end cover (2) is provided with a fourth connecting position (2W) which is corresponding to the second connecting position (15W), the first connecting position (14W) is matched with the third connecting position (31W), the fifth connecting position (13W) is matched with the sixth connecting position (30W), and the second connecting position (15W) is matched with the fourth connecting position (2W);
the connecting part (15) is provided with a first oil groove (15 a), a first oil hole (15 b) and a first spline (15 d), the first oil groove (15 a) is an annular groove formed on the inner surface of the connecting part (15), the first spline (15 d) is arranged at the opening end of the connecting part (15), and the first oil hole (15 b) penetrates through the side wall of the connecting part (15) and is communicated with the first oil groove (15 a) and the first spline (15 d); the outer ring (3) further comprises an extension part (32) connected to the other end of the matching part (31), a plurality of through second oil holes (32 b) are formed in the outer circumferential surface of the extension part (32), a second oil groove (32 a) is formed in the inner circumferential surface of the extension part (32), the second oil groove (32 a) is recessed relative to the inner circumferential surface of the extension part (32), the second oil holes (32 b) penetrate through the side wall of the extension part (32) and are communicated with the second oil grooves (32 a), first yielding holes (16) are formed in the first supporting part (11) and the second supporting part (12) of the carrier main body (1), the central axes of the first yielding holes (16) are respectively overlapped with the central axes of the first supporting part (11) and the adjacent two side circular arc surfaces of the second supporting parts (12), and the first yielding holes (16) can be adjusted according to different sizes of the planetary gears and different diameters; the end cover (2) further comprises a second abdication hole (2 a), and the second abdication hole (2 a) is arranged on the central axis of the end cover (2).
2. The planetary gear carrier structure according to claim 1, wherein the first supporting portion (11) and the second supporting portion (12) are respectively a plurality of circumferentially spaced-apart bottom portions of the supporting portion (10) apart from the connecting portion (15) and the second supporting portion (12) extends toward the connecting portion (15) to form a boss shape, the first supporting portion (11) and the second supporting portion (12) are respectively provided with a first supporting hole (11 a) and a second supporting hole (12 a) penetrating therethrough, the first supporting holes (11 a) and the second supporting holes (12 a) are alternately arranged at intervals, the end cover (2) is a disc-shaped member, the third supporting portion (21) and the fourth supporting portion (22) are formed on end faces thereof, the end cover (2) is circumferentially spaced-apart with a third supporting hole (21 a) and a fourth supporting hole (22 a), the first supporting hole (11 a) corresponds to the third supporting hole (21 a), and the fourth supporting hole (22 a) corresponds to the fourth supporting hole (12 a).
3. The planetary gear carrier structure according to claim 2, wherein the first supporting portion (11) and the second supporting portion (12) are further provided with a first limiting portion (11 b) and a second limiting portion (12 b), the first limiting portion (11 b) and the second limiting portion (12 b) are respectively disposed at edges of the first supporting hole (11 a) and the second supporting hole (12 a), and edges of the third supporting hole (21 a) and the fourth supporting hole (22 a) are respectively provided with a third limiting portion (21 b) and a fourth limiting portion (22 b) corresponding to the first limiting portion (11 b) and the second limiting portion (12 b), the first limiting portion (11 b) is matched with the third limiting portion (21 b), and the second limiting portion (12 b) is matched with the fourth limiting portion (22 b).
4. The planetary gear carrier structure according to claim 1, wherein the second supporting portion (12) is further provided with a first weight-reducing groove (12 c), and the first weight-reducing groove (12 c) is formed by being recessed on the outer side of the second supporting portion (12); the outer ring (3) comprises a matching part (31), and a second weight reduction groove (31 a) which is concave is formed in the matching part (31).
5. A planetary gear mechanism (100 b), characterized by comprising a planetary gear carrier structure (100 a) and a long planetary gear (401) according to any one of claims 1-4, a short planetary gear (402), a large sun gear (501), a small sun gear (502), a planetary gear ring (112) and an input shaft (60), wherein the large sun gear (501) and the small sun gear (502) are mounted on the input shaft (60), and the large sun gear (501) and the small sun gear (502) are rotatable relatively; the plurality of long planet gears (401) are arranged in the carrier main body (1) and are arranged between a first supporting part (11) and a third supporting part (21) along the circumferential direction of the planet gear carrier structure (100 a), the long planet gears (401) are meshed with the big sun gear (501), the plurality of short planet gears (402) are arranged in the carrier main body (1) and are arranged between a second supporting part (12) and a fourth supporting part (22) along the circumferential direction of the planet gear carrier structure (100 a), and the short planet gears (402) are meshed with the small sun gear (502); the planetary gear ring (112) is sleeved between the bracket main body (1) and the outer ring (3) and meshed with the long planetary gear (401); a plurality of the long planetary gears (401) are in one-to-one correspondence with a plurality of the short planetary gears (402).
6. The planetary gear mechanism according to claim 5, wherein the planetary gear mechanism (100 b) comprises a first gear pin (117 a) and a second gear pin (117 b), the long planetary gear (401) is mounted on the first gear pin (117 a), two ends of the first gear pin (117 a) are respectively positioned between a first supporting hole (11 a) and a third supporting hole (21 a), and are axially limited between a first limiting part (11 b) and a third limiting part (21 b); the short planetary gear (402) is mounted on the second gear pin shaft (117 b), two ends of the second gear pin shaft (117 b) are respectively positioned between a second supporting hole (12 a) and a fourth supporting hole (22 a) on the end cover (2), and the axial limit is positioned between a second limit part (12 b) and a fourth limit part (22 b).
7. The planetary gear mechanism according to claim 6, wherein an oil distribution plate (114) is further arranged on the outer end surface of the end cover (2) of the planetary gear support structure (100 a), a plurality of axially extending hollow oil distribution pipes are distributed in the circumferential direction near one end of the planetary gear support structure (100 a), oil holes are respectively formed in the first gear pin shaft (117 a) and the second gear pin shaft (117 b), the oil distribution pipes respectively extend into the oil holes of the first gear pin shaft (117 a) and the second gear pin shaft (117 b), and an oil collecting ring is arranged at the other end of the oil distribution plate (114).
8. The planetary gear mechanism according to claim 5, wherein the planetary gear mechanism (100 b) further comprises a first multi-plate brake (115), a first multi-plate clutch (116 a), a one-way clutch (116 b), a second multi-plate brake, a second multi-plate clutch, and a third multi-plate clutch, a first spline (15 d) is provided on the carrier body (1) of the planetary gear carrier structure (100 a), the first spline (15 d) is provided at an open end of the connecting portion (15), a second spline (31 b) is provided on the outer ring (3) of the planetary gear carrier structure (100 a), the second spline (31 b) is formed on an outer circumferential surface of one end of the mating portion (31) of the outer ring (3), the outer ring (3) further comprises an extension portion (32) connected to the other end of the mating portion (31), the first multi-plate clutch (116 a), the first friction plate (115) is respectively connected to the first spline (31 b) of the outer ring (3), the second spline (31 b) is mounted on the outer ring (3) of the one-plate clutch, and the second spline (31 b) is mounted on the outer ring (3) of the one end of the outer ring (31), the pinion (502) is connected to the third multiplate clutch.
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| CN201810451023.2A CN108397543B (en) | 2018-05-11 | 2018-05-11 | Planetary gear support structure and planetary gear mechanism with same |
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| CN201810451023.2A CN108397543B (en) | 2018-05-11 | 2018-05-11 | Planetary gear support structure and planetary gear mechanism with same |
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| CN108397543B true CN108397543B (en) | 2023-11-14 |
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