CN212804170U - Lubricating structure of compound differential planetary mechanism of stepless speed change tractor - Google Patents
Lubricating structure of compound differential planetary mechanism of stepless speed change tractor Download PDFInfo
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- CN212804170U CN212804170U CN202021239755.4U CN202021239755U CN212804170U CN 212804170 U CN212804170 U CN 212804170U CN 202021239755 U CN202021239755 U CN 202021239755U CN 212804170 U CN212804170 U CN 212804170U
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Abstract
The lubricating structure of the compound differential planetary mechanism of the stepless speed change tractor comprises a first lubricating oil path and a second lubricating oil path, wherein oil inlets of the first lubricating oil path and the second lubricating oil path are mutually independent, the first lubricating oil path is mainly formed by communicating a plurality of oil holes arranged in an input sun gear shaft and a hollow shaft, the hollow shaft is arranged outside the input sun gear shaft through a spline sleeve, and lubricating oil entering the first lubricating oil path reaches a bearing at a planetary gear ring under the action of centrifugal force generated by rotation of the sun gear shaft and the hollow shaft and lubricates the bearing; the second lubricating oil path is mainly formed by communicating a plurality of oil holes arranged in the planet carrier and the planet wheel shaft, and pressure lubricating oil entering the second lubricating oil path flows along the path of the second lubricating oil path under the action of oil pressure and is sprayed out through an oil outlet of the second lubricating oil path to lubricate a bearing arranged on the planet wheel shaft. The utility model discloses on all parts all are the double entry differential planetary mechanism of rotating member, through reasonable oil duct route setting, realized that the bearing on the planet row part is lubricated.
Description
Technical Field
The utility model belongs to tractor continuously variable transmission field, concretely relates to infinitely variable speed tractor double entry differential planetary mechanism's lubricating structure.
Background
The stepless speed change transmission system has the characteristic of continuous speed ratio of the gearbox, has stable power transmission and strong adaptability, can enable the engine to work at the optimal economic point or the optimal power point under any condition, and is particularly suitable for occasions with accurately controlled speed, occasions requiring ultra-low speed, occasions with frequently changed tractor load, occasions with high requirements on comfort and economy and the like. The stepless speed change transmission system has good fuel economy, dynamic property, comfort and emission performance, so the stepless speed change tractor can adapt to work in various occasions, can realize various functions required by fine agriculture, has incomparable advantages compared with other transmission systems, and represents the technical development direction of future high-end tractors. The key core component of the stepless speed change tractor is a differential planetary mechanism, all components on a differential planetary row are rotating parts, and bearing lubrication on the planetary row is difficult to solve through a conventional lubrication mode. Therefore, it is necessary to develop a lubrication structure capable of satisfying the lubrication requirements of the bearings on the rotary differential planetary row.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stepless speed change tractor double entry differential planetary mechanism's lubricating structure through reasonable oil duct route setting, has realized through the bearing lubrication on the planet row part that conventional lubrication mode is difficult to solve.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a lubricating structure of a compound differential planetary mechanism of a continuously variable tractor comprises a first lubricating oil path and a second lubricating oil path, wherein oil inlets of the first lubricating oil path and the second lubricating oil path are mutually independent, the first lubricating oil path is mainly formed by communicating a plurality of oil holes arranged in an input sun gear shaft and a hollow shaft, the hollow shaft is arranged outside the input sun gear shaft through a spline sleeve, an oil inlet of the first lubricating oil path is arranged on a bearing cover at the input end of the input sun gear shaft, an oil outlet of the first lubricating oil path is opened at a planetary gear ring arranged outside the hollow shaft, and lubricating oil entering the first lubricating oil path reaches a bearing at the planetary gear ring under the action of centrifugal force generated by rotation of the sun gear shaft and the hollow shaft; the second lubricating oil path is mainly formed by communicating a plurality of oil holes arranged in the planet carrier and the planet wheel shaft, an oil inlet of the second lubricating oil path is formed in the shell partition plate, the shell partition plate is arranged at one end of the planet carrier, an oil outlet of the second lubricating oil path is opened at the position, used for mounting a bearing, on the planet wheel shaft, pressure lubricating oil entering the second lubricating oil path flows along the path of the second lubricating oil path under the action of oil pressure and is sprayed out through the oil outlet of the second lubricating oil path to lubricate the bearing mounted on the planet wheel shaft.
The first lubricating oil path comprises a first horizontal oil hole, a first vertical oil hole and a second vertical oil hole, the first horizontal oil hole and the first vertical oil hole are arranged in the input sun gear shaft and communicated, the first horizontal oil hole is arranged along the axial direction of the input sun gear shaft, the first vertical oil hole is arranged along the radial direction of the input sun gear shaft, the second vertical oil hole is arranged in the side wall of one side of the hollow shaft body along the radial direction of the hollow shaft and penetrates through the side wall of the hollow shaft, the inner port of the second vertical oil hole is communicated with the first vertical oil hole, and the outer port of the second vertical oil hole serves as an oil outlet of the first lubricating oil path.
And a first annular oil groove which can be communicated with the first vertical oil hole and the second vertical oil hole is also formed in the inner wall of the hollow shaft.
And the first horizontal oil hole is communicated with the oil inlet of the first lubricating oil path through an oil pipe joint.
The second lubricating oil path comprises a second horizontal oil hole, a third vertical oil hole, a fourth vertical oil hole, a third horizontal oil hole and a fifth vertical oil hole; the second horizontal oil holes and the third vertical oil holes are formed in the planet carrier, the second horizontal oil holes are formed in the direction parallel to the rotation axis of the planet carrier, the third vertical oil holes are vertically communicated with the second horizontal oil holes, and the number of the second horizontal oil holes and the number of the third vertical oil holes are the same as that of the planet wheel shafts; the fourth vertical oil hole, the third horizontal oil hole and the fifth vertical oil hole are arranged in the planet wheel shaft, the third horizontal oil hole is arranged along the axial direction of the planet wheel shaft, the fourth vertical oil hole and the fifth vertical oil hole are vertically communicated with the third horizontal oil hole, and the fourth vertical oil hole is butted and communicated with the third vertical oil hole; and a fifth vertical oil hole is opened on the excircle surface of the planet wheel shaft and is used as an oil outlet of the second lubricating oil path.
The second horizontal oil hole and the third vertical oil hole are both provided with outer ports at the edge of the planet carrier, a third sealing plug is installed at the outer port of the second horizontal oil hole, and a first sealing plug is installed at the outer port of the third vertical oil hole.
The third horizontal oil hole is provided with an outer port at one shaft end of the planet wheel shaft, and a second sealing plug is arranged at the outer port.
The planet carrier and the planet wheel shaft are positioned through the positioning pin, so that the butt joint of the fourth vertical oil hole and the third vertical oil hole is ensured.
The planet carrier is also provided with a second annular oil groove and a sixth vertical oil hole which are communicated, the second annular oil groove is communicated with an oil inlet of a second lubricating oil path arranged on the shell partition plate, the sixth vertical oil hole and the second horizontal oil hole are arranged in the same number and are vertically communicated in a one-to-one correspondence manner.
The both sides of second annular oil groove still are equipped with sealed annular to at the annular inslot installation dynamic seal ring, the planet carrier passes through dynamic seal ring suit on the casing baffle.
The utility model discloses process and principle to lubricating are carried out to the bearing among the differential planetary mechanism of double entry as follows:
(1) the process of lubricating the bearing at the position of the planetary ring on the planetary row comprises the following steps: in the rotating process of the output sun gear shaft, lubricating oil entering the first horizontal oil hole is thrown into a first annular oil groove of the hollow shaft under the action of centrifugal force and is stored, and then the lubricating oil in the first annular oil groove is thrown out through a second vertical oil hole by means of the rotating centrifugal force of the hollow shaft, so that a bearing at the position of the planet gear ring is lubricated;
(2) the process of lubricating the bearing at the planet wheel shaft on the planet row comprises the following steps: lubricating oil with pressure enters a second annular oil groove on the planet carrier from an oil inlet of a second lubricating oil path on a shell partition plate, and because the two sides of the second annular oil groove of the planet carrier are provided with the movable sealing rings, even if the planet carrier rotates, the lubricating oil entering the second annular oil groove can only enter a sixth vertical oil hole Q on the planet carrier, and then the pressure lubricating oil enters a fourth vertical oil hole on a planet wheel shaft through a second horizontal oil hole and a third vertical oil hole on the planet carrier and is sprayed out from two fifth vertical oil holes through the third horizontal oil hole on the planet wheel shaft, so that a bearing at the planet wheel shaft is lubricated.
The utility model discloses on all parts all are the double entry differential planetary mechanism of rotating member, through reasonable oil duct route setting, solved among the prior art to the lubricated difficult problem of bearing on the differential planetary mechanism.
Drawings
FIG. 1 is a schematic structural view of a compound differential planetary mechanism of a middle stepless speed change tractor according to the present invention;
numerical sequence numbers in the drawings: 1. the device comprises a bearing cover, 2, an oil pipe joint, 3, an input sun wheel shaft, 4, a hollow shaft, 5, a planet wheel shaft, 6, a positioning pin, 7, a first sealing plug, 8, a planet carrier, 9, a second sealing plug, 10, a third sealing plug, 11, a shell partition plate, 12, a dynamic sealing ring, 13 and a planet gear ring;
letter numbers in the drawings: a-a first lubricating oil path oil inlet, B-a joint oil path, C, a first horizontal oil hole, D, a first annular oil groove, E, a second vertical oil hole, F, a first vertical oil hole, G, a fifth vertical oil hole, H, a third horizontal oil hole, J, a fourth vertical oil hole, K, a positioning groove, L, a third vertical oil hole, M, a second horizontal oil hole, N, a second lubricating oil path oil inlet, P, a second annular oil groove, Q, and a sixth vertical oil hole.
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and examples, but not to be construed as limiting the present invention in any way.
With respect to the description of the letter numbers in FIG. 1: because the English letters "I" and the number "1" are similar and the number "O" and the number "0" are similar, in order to avoid confusion, the English letters "I" and "O" are not included in the numbers from "A" to "Q" in FIG. 1.
A lubricating structure of a compound differential planetary mechanism of a stepless speed change tractor is applied to the compound differential planetary mechanism of a stepless speed change box, in particular to the stepless speed change box adopting mechanical hydraulic double power flows.
Referring to the attached drawings, the lubricating structure comprises an input sun wheel shaft 3, a hollow shaft 4, a planet carrier 8, planet wheel shafts 5 and planet gear rings 13, wherein the hollow shaft 4 is sleeved on the input sun wheel shaft 3 through splines to realize synchronous rotation of the input sun wheel shaft 3 and the hollow shaft 4, the planet gear rings 13 are sleeved on the hollow shaft 4 through bearings, planet wheels are rotatably installed on the planet wheel shafts 5 through needle bearings, and the planet carrier 8 is provided with a plurality of planet wheel shafts 5.
A first lubricating oil path is provided in the input sun gear shaft 3 and the hollow shaft 4, and is used for lubricating a bearing between the planetary gear ring 13 and the hollow shaft 4.
The first lubricating oil path includes a first horizontal oil hole C, a first vertical oil hole F, a first annular oil groove D, and a second vertical oil hole E.
The first horizontal oil hole C is a deep blind hole and is arranged in the center of the input sun gear shaft 3 and is arranged along the axial direction of the input sun gear shaft 3, the inlet of the first horizontal oil hole C is communicated with a first lubricating oil path oil inlet A arranged in the center of the bearing cover 1 through an oil pipe joint 2, one end of the oil pipe joint 2 extends into the first lubricating oil path oil inlet A, the other end of the oil pipe joint 2 extends into the first horizontal oil hole C, and the center of the oil pipe joint 2 is provided with a joint oil path B for communicating the first horizontal oil hole C with the first lubricating oil path oil inlet A; the first vertical oil hole F is arranged along the radial direction of the input sun gear shaft 3, one end of the first vertical oil hole F is communicated with the first horizontal oil hole C, the other end of the first vertical oil hole F is communicated with the first annular oil groove D arranged on the inner wall of the hollow shaft 4, the second vertical oil hole E is arranged in the side wall of one side of the shaft body of the hollow shaft 4 along the radial direction of the hollow shaft 4 and penetrates through the side wall of the hollow shaft 4, and the inner port of the second vertical oil hole E is communicated with the first annular oil groove D, and the outer port of the second vertical oil hole E serves as an oil outlet.
An embodiment in which the bearing at the planetary ring gear 13 is lubricated by the first lubricating oil path: lubricating oil enters from a first lubricating oil path oil inlet A on the bearing cover 1 and enters into a first horizontal oil hole C on the input sun gear shaft 3 through a joint oil path B on the oil pipe joint 2, when the input sun gear shaft 3 rotates, the lubricating oil is thrown out to a first annular oil groove D on the hollow shaft 4 through a first vertical oil hole F on the input sun gear shaft 3 under the action of centrifugal force and is stored, the hollow shaft 4 rotates along with the input sun gear shaft 3, and the lubricating oil stored in the first annular oil groove D of the hollow shaft 4 is thrown out through a second vertical oil hole E on the hollow shaft 4 by the centrifugal force generated by rotation, so that the bearing lubrication of the planet-discharging upper planet ring 13 is realized.
And a second lubricating oil path is arranged in the planet carrier 8 and the planet wheel shaft 5 and is used for lubricating a needle bearing between the planet wheel shaft 5 and the planet wheel.
The second lubricating oil path includes a second horizontal oil hole M, a third vertical oil hole L, a fourth vertical oil hole J, a third horizontal oil hole H and two fifth vertical oil holes G.
The second horizontal oil hole M and the third vertical oil hole L are arranged in the planet carrier 8, the second horizontal oil hole M is arranged along the direction parallel to the rotation axis of the planet carrier 8, the third vertical oil hole L is vertically communicated with the second horizontal oil hole M, the planet carrier 8 is also provided with a second annular oil groove P and a sixth vertical oil hole Q, the sixth vertical oil hole Q is used for communicating the second annular oil groove P and the second horizontal oil hole M, two sides of the second annular oil groove P are also provided with sealing ring grooves, a movable sealing ring 12 is arranged in each sealing ring groove, so that the lubricating oil entering the second annular oil groove P of the planet carrier 8 can only enter the sixth vertical oil hole Q on the planet carrier 8, the planet carrier 8 is sleeved in the shell partition plate 11 through the movable sealing ring 12, a second lubricating oil path oil inlet N is formed in the shell partition plate 11, and the second lubricating oil path oil inlet N is communicated with the second annular oil groove P in a butt joint mode.
The fourth vertical oil hole J, the third horizontal oil hole H and the fifth vertical oil hole G are arranged in the planet wheel shaft 5, wherein the third horizontal oil hole H is arranged along the axial direction of the planet wheel shaft 5, the fourth vertical oil hole J and the fifth vertical oil hole G are both vertically communicated with the third horizontal oil hole H, and the fourth vertical oil hole J and the third vertical oil hole L are butted and communicated; and a fifth vertical oil hole G is positioned at the opening end of the outer circular surface of the planet wheel shaft 5, is an oil outlet of the second lubricating oil path and is positioned at a bearing retainer ring at one end of the needle bearing.
In order to ensure the butt joint and the communication of the fourth vertical oil hole J and the third vertical oil hole L, a positioning pin 6 is in threaded connection with the planet carrier 8, and the positioning pin 6 is fixed in a positioning groove K on the planet wheel shaft 5, so that the positioning of the planet wheel shaft 5 and the fixing of the fourth vertical oil hole J in the direction are realized.
In the compound differential planetary mechanism, the planet carrier 8 is provided with a plurality of planet wheel shafts 5, each planet wheel shaft 5 is provided with a planet wheel, in order to lubricate a needle bearing between each planet wheel shaft 5 and the planet wheel, the planet carrier 8 is internally provided with a second horizontal oil hole M, a third vertical oil hole L and a sixth vertical oil hole Q which have the same quantity with the planet wheel shafts 5, so as to provide lubricating oil for an oil path on each planet wheel shaft 5, and the second annular oil groove P and the second lubricating oil path oil inlet N are only required to be provided with one oil path.
The second horizontal oil hole M and the third vertical oil hole L are both provided with outer ports at the edge of the planet carrier 8, a third sealing plug 10 is installed at the outer port of the second horizontal oil hole M, and a first sealing plug 7 is installed at the outer port of the third vertical oil hole L.
The third horizontal oil hole H is provided with an outer port at the shaft end of the planet wheel shaft 5, and a second sealing plug 9 is arranged at the outer port.
The embodiment of lubricating the bearings at the planet wheel shafts of the planet row through the second lubricating oil path is as follows: taking any one of the planetary gear shafts 5 as an example, under the action of pressure, the pressure lubricating oil enters the second annular oil groove P on the planet carrier 8 from the second lubricating oil path oil inlet hole N on the casing partition plate 11, then enters the sixth vertical oil hole Q on the planet carrier 8, then enters the fourth vertical oil hole J on the planetary gear shaft 5 through the second horizontal oil hole M and the third vertical oil hole L on the planet carrier 8, and is ejected from the fifth vertical oil holes G through the third horizontal oil hole H on the planetary gear shaft 5, thereby realizing the lubrication of the needle bearings at the planetary gear shaft 5.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the embodiments of the present invention can be modified or replaced with equivalents with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present application.
Claims (10)
1. The lubricating structure of the compound differential planetary mechanism of the infinitely variable speed tractor is characterized in that: the lubricating oil inlet of the first lubricating oil path is arranged on a bearing cover (1) at the input end of the input sun wheel shaft (3), an oil outlet of the first lubricating oil path is opened at a planetary gear ring (13) arranged outside the hollow shaft (4), and lubricating oil entering the first lubricating oil path reaches a bearing at the planetary gear ring (13) under the action of centrifugal force generated by rotation of the input sun wheel shaft (3) and the hollow shaft (4) and lubricates the bearing; the second lubricating oil path is mainly formed by communicating a plurality of oil holes formed in the planet carrier (8) and the planet wheel shaft (5), an oil inlet (N) of the second lubricating oil path is formed in the shell partition plate (11), the shell partition plate (11) is arranged at one end of the planet carrier (8), an oil outlet of the second lubricating oil path is opened at the position, used for mounting a bearing, on the planet wheel shaft (5), and pressure lubricating oil entering the second lubricating oil path flows along the path of the second lubricating oil path under the action of oil pressure and is sprayed out through the oil outlet of the second lubricating oil path to lubricate the bearing mounted on the planet wheel shaft (5).
2. The lubricating structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 1, characterized in that: the first lubricating oil path comprises a first horizontal oil hole (C), a first vertical oil hole (F) and a second vertical oil hole (E), the first horizontal oil hole (C) and the first vertical oil hole (F) are arranged in the input sun wheel shaft (3) and communicated, the first horizontal oil hole (C) is arranged along the axial direction of the input sun wheel shaft (3), the first vertical oil hole (F) is arranged along the radial direction of the input sun wheel shaft (3), the second vertical oil hole (E) is arranged in the side wall of one side of the shaft body of the hollow shaft (4) along the radial direction of the hollow shaft (4) and penetrates through the side wall of the hollow shaft (4), the inner port of the second vertical oil hole (E) is communicated with the first vertical oil hole (F), and the outer port is used as an oil outlet of the first lubricating oil path.
3. The lubricating structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 2, characterized in that: and a first annular oil groove (D) which can communicate the first vertical oil hole (F) and the second vertical oil hole (E) is also formed in the inner wall of the hollow shaft (4).
4. The lubricating structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 2 or 3, characterized in that: the first horizontal oil hole (C) is communicated with the first lubricating oil path oil inlet (A) through an oil pipe joint (2).
5. The lubricating structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 1, characterized in that: the second lubricating oil path comprises a second horizontal oil hole (M), a third vertical oil hole (L), a fourth vertical oil hole (J), a third horizontal oil hole (H) and a fifth vertical oil hole (G); the second horizontal oil holes (M) and the third vertical oil holes (L) are formed in the planet carrier (8), the second horizontal oil holes (M) are formed in the direction parallel to the rotation axis of the planet carrier (8), the third vertical oil holes (L) are vertically communicated with the second horizontal oil holes (M), and the number of the second horizontal oil holes (M) and the number of the third vertical oil holes (L) are the same as that of the planet wheel shafts (5); the fourth vertical oil hole (J), the third horizontal oil hole (H) and the fifth vertical oil hole (G) are arranged in the planet wheel shaft (5), wherein the third horizontal oil hole (H) is arranged along the axial direction of the planet wheel shaft (5), the fourth vertical oil hole (J) and the fifth vertical oil hole (G) are vertically communicated with the third horizontal oil hole (H), and the fourth vertical oil hole (J) and the third vertical oil hole (L) are butted and communicated; and a fifth vertical oil hole (G) is opened on the outer circular surface of the planet wheel shaft (5) and is used as an oil outlet of the second lubricating oil path.
6. The lubrication structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 5, characterized in that: and the second horizontal oil hole (M) and the third vertical oil hole (L) are provided with outer ports at the edge of the planet carrier (8), a third sealing plug (10) is arranged at the outer port of the second horizontal oil hole (M), and a first sealing plug (7) is arranged at the outer port of the third vertical oil hole (L).
7. The lubrication structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 5, characterized in that: and the third horizontal oil hole (H) is provided with an outer port at one shaft end of the planet wheel shaft (5), and a second sealing plug (9) is arranged at the outer port.
8. The lubrication structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 5, characterized in that: the planet carrier (8) and the planet wheel shaft (5) are positioned through the positioning pin (6) so as to ensure the butt joint of the fourth vertical oil hole (J) and the third vertical oil hole (L).
9. The lubrication structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 5, characterized in that: the planet carrier (8) is further provided with a second annular oil groove (P) and a sixth vertical oil hole (Q) which are communicated, the second annular oil groove (P) is communicated with a second lubricating oil path oil inlet (N) formed in the shell partition plate (11), the sixth vertical oil hole (Q) is communicated with the second horizontal oil hole (M) in the same number, and the sixth vertical oil hole (Q) and the second horizontal oil hole (M) are vertically communicated in a one-to-one correspondence manner.
10. The lubrication structure of a compound differential planetary mechanism of a continuously variable tractor according to claim 9, characterized in that: the both sides of second annular oil groove (P) still are equipped with the seal ring groove to installation movable seal ring (12) in the seal ring groove, planet carrier (8) are through moving seal ring (12) suit on casing baffle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021239755.4U CN212804170U (en) | 2020-06-30 | 2020-06-30 | Lubricating structure of compound differential planetary mechanism of stepless speed change tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021239755.4U CN212804170U (en) | 2020-06-30 | 2020-06-30 | Lubricating structure of compound differential planetary mechanism of stepless speed change tractor |
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| Publication Number | Publication Date |
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| CN212804170U true CN212804170U (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021239755.4U Active CN212804170U (en) | 2020-06-30 | 2020-06-30 | Lubricating structure of compound differential planetary mechanism of stepless speed change tractor |
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| CN (1) | CN212804170U (en) |
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2020
- 2020-06-30 CN CN202021239755.4U patent/CN212804170U/en active Active
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