A planetary gear transmission lubrication system and working method thereof

Abstract

The present invention relates to a planetary gear transmission lubrication system, including a transmission body housing, a lubrication passage connected to an oil reservoir is provided inside the housing, and the lubrication passage leads to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the outer ends of the input shaft and the output shaft inside the housing. By taking advantage of the characteristics of fewer gears, fewer planetary gears and shifting mechanisms in new energy vehicle transmissions, the lubrication requirements can be met without an oil pump.

Description

Technical Field

[0001] The invention relates to a planetary gear transmission lubrication system and a working method thereof, and relates to the field of planetary gear transmissions, and in particular to the field of lubrication of planetary gear transmissions with fewer gears for new energy vehicles. Background Art

[0002] In the field of traditional automobile transmissions, the gears and bearings in parallel shaft transmissions are arranged axially and radially in parallel. The gears will not wrap around each other. The shift mechanism and the gears are distributed in separate rooms or in the same room. Even if they are distributed in the same room, they will not wrap around the gears or bearings. Therefore, the splashing of lubricating oil in parallel shaft transmissions can meet the lubrication conditions. In the field of planetary gear transmissions, there is a phenomenon of wrapping between gears and the wrapping of gears and bearings by the shift mechanism, as well as the blocking of gears, bearings and friction plates by related components. Under the action of wrapping, blocking and centrifugal force, the splashing lubricating oil is difficult to reach the parts close to the axis. The lubrication of the system relies on the engine to drive the oil pump and spray the lubricating oil through the central axial parts that need to be lubricated. However, in the field of new energy vehicles, since the speed of the motor is very low when the vehicle is at low speed, the flow rate of the motor-driven oil pump is difficult to meet the lubrication needs. Setting up a dedicated electronic oil pump system is costly, large in size and increases energy loss. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a planetary gear transmission lubrication system and a working method thereof, which utilizes the characteristics of new energy vehicle transmissions with fewer gears, fewer planetary gears and shift mechanisms, and can meet the lubrication requirements without an oil pump.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a planetary gear transmission lubrication system, including a shell of a transmission body, a lubrication passage connected to an oil reservoir is provided inside the shell, and the lubrication passage leads to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the outer ends of the input shaft and the output shaft inside the shell.

[0005] Preferably, the lubrication passage passes through an internal oil passage of the input shaft.

[0006] Preferably, a first oil channel is provided in the middle of the input shaft, and the left end or both ends of the first oil channel are closed. At least one first oil hole is provided at the left end of the first oil channel, one end of the first oil hole is interconnected with the first oil channel, and the other end is connected to the second oil chamber, the second oil chamber is connected to the first oil chamber, and the first oil chamber is connected to the oil reservoir. At least one second oil hole is provided on the right side of the first oil hole, one end of the second oil hole is interconnected with the first oil channel, and the other end faces the lubricated element around the sun gear. At least one third oil hole is also provided on the right side of the first oil hole, one end of the third oil hole is interconnected with the first oil channel, and the other end faces the oil groove of the planetary carrier. Preferably, when both ends of the first oil channel are closed, the sum of the diameters of the second and third oil holes is not greater than that of the first oil hole, so as to ensure that lubricating oil passes through each oil hole.

[0007] Preferably, the input shaft is rollingly connected to the housing through the first bearing, an oil seal is arranged on the left side of the first bearing to prevent the lubricating oil from flowing out of the housing from the left side, and a bearing cover is arranged on the right side of the first bearing, so that an axial seal is formed between the oil seal and the bearing cover of the first bearing and a second oil chamber is formed with the housing and the input shaft; one end of the input shaft in the housing is sleeved in the middle of one end of the output shaft in the housing and is connected through the second bearing; the output shaft is rollingly connected to the housing through the fifth bearing, and an oil seal is arranged on the right side of the fifth bearing to prevent the lubricating oil from flowing out of the housing from the right side; at least one fourth oil hole is arranged on the output shaft on the same vertical plane as the third oil hole, and the lubricating oil is thrown from the third oil hole to the oil groove of the planetary carrier through the fourth oil hole; the planetary row of the transmission body is composed of a sun gear, a planetary carrier, and a gear ring; the planetary carrier is composed of a bracket, a planetary gear, a planetary gear shaft, a third bearing, a fourth bearing, and a second oil baffle plate; the second oil baffle plate is arranged on the right side of the planetary carrier, the outer periphery of the second oil baffle plate is fixedly connected to the bracket and sealed, and the inner periphery is expanded outward, which is conducive to collecting the lubricating oil, and the second oil baffle plate and the bracket form an oil groove.

[0008] Preferably, both ends of the planetary gear shaft are fixedly connected to the bracket, a second oil channel is provided in the middle of the planetary gear shaft, one end of the second oil channel is closed, the other end is open and communicated with the oil groove, an eighth oil hole, a ninth oil hole and a tenth oil hole are radially provided on the planetary gear shaft, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are communicated with the second oil channel; the sum of the diameters of the eighth, ninth and tenth oil holes is not greater than the diameter of the second oil channel to ensure that each oil hole has sufficient lubricating oil passing through, the planetary gear is rollingly connected to the planetary gear shaft through the third bearing, and both ends of the planetary gear are respectively connected to the bracket for relative rotation through the fourth bearing; relatively rotating parts such as the input shaft, output shaft, sun gear, planetary carrier and ring gear are all connected through the second bearing.

[0009] Preferably, at least one oil reservoir is provided on the upper part of the shell of the transmission body, and the oil reservoir is arranged inside or outside the shell, the oil inlet of the oil reservoir faces upward and is communicated with the inner cavity of the transmission body, the oil outlet of the oil reservoir is arranged at the bottom of the oil reservoir and is communicated with the upper part of the filter of the first oil chamber, the oil outlet of the oil reservoir should not be too large, and its flow capacity plus the amount of oil splashed into the first oil chamber can be greater than the oil output of the second and third oil holes; at least one first oil chamber is provided above the input shaft in the shell, and the first oil chamber is surrounded by a first oil baffle plate and the shell, and the upper part of the first oil baffle plate is kept a certain distance from the shell The oil inlet is formed and the upper part of the first oil baffle is low, which is convenient for the lubricating oil splashed at a low position to enter the first oil chamber. The remaining part is fixedly connected to the shell body at the periphery, and the connection is sealed. The oil outlet of the first oil chamber is arranged at the bottom of the first oil chamber and communicates with the second oil chamber; at least one seventh oil hole is arranged at the lower part of the shell body, and the oil outlet of the seventh oil hole is higher than the bottom shell body to prevent the sediment at the bottom from being stirred when the oil is discharged; at least one sixth oil hole is arranged on the shell body near the oil inlet of the oil reservoir, and the sixth oil hole and the seventh oil hole at the bottom are communicated through an oil pipe or an oil channel processed on the shell body; a filter is arranged in the first oil chamber.

[0010] Preferably, at least one oil receiving plate is provided in the upper inner part of the shell body, and the oil receiving plate is fixedly connected to the shell body or to the mouth of the oil reservoir. The oil receiving plate is at the lowest position at one end close to the oil inlet of the oil reservoir and leads to the inside of the oil reservoir. The lubricating oil stirred up when the transmission transmission part or the shifting element rotates can flow into the oil reservoir through the oil receiving plate, which is conducive to receiving more splashing lubricating oil; a first oil guide rib is processed on the bottom of the right side of the first oil baffle plate, and the first oil guide rib is inclined from top to bottom toward the first bearing, and the splashing lubricating oil can flow along the first oil guide rib to the first bearing for lubrication; at least one second oil guide rib is provided on the shell body on the right side of the transmission body, and the second oil guide rib extends from the upper right to the lower left into the inner circle of the oil groove, but does not connect with the bracket and The second oil baffle interferes, and the lower section of the second oil guide rib is provided with a fifteenth oil hole extending to the fifth bearing, so that the lubricating oil can flow to the fifth bearing; the clutch and the brake are located at the outer periphery of the planetary row inside the housing, and the clutch and brake friction element oil grooves are connected to the planetary row through the fifth oil hole; the clutch is composed of a clutch drum, a clutch hub, a first friction plate and a first steel plate; the brake is composed of a second friction plate and a second steel plate, the second friction plate is slidingly connected to one of the components of the planetary row through an inner spline, and the second steel plate is slidingly connected to the housing through an outer spline; the clutch drum, the clutch hub, the first friction plate and the first steel plate are slidingly connected or fixedly connected to the relevant components of the planetary row according to the design intention of the transmission.

[0011] Another planetary gear transmission lubrication system includes a transmission body housing, wherein a lubrication passage connected to an oil reservoir is provided inside the housing, and the lubrication passages lead to lubricated elements around the sun gear of the transmission body, elements around the planetary gear shaft, and elements around the outer ends of the input shaft and the output shaft inside the housing; the lubrication passage does not pass through the oil passage inside the input shaft; the oil outlet of the oil reservoir is connected to a first oil chamber, and the first oil chamber is surrounded by the housing and a first oil baffle plate on the right side; the first oil chamber leads to lubricated elements around the sun gear and other related components of the planetary gear through an eleventh oil hole on the first oil baffle plate and a twelfth oil hole on the left end face of the planetary gear; the input shaft is rollingly connected to the housing through a first bearing, and the first shaft An oil seal is arranged on the left side of the bearing to prevent the lubricating oil from flowing out of the housing from the left side; one end of the input shaft in the housing is sleeved in the middle of one end of the output shaft in the housing and is connected through the second bearing; the output shaft is rollingly connected to the housing through the fifth bearing, and an oil seal is arranged on the right side of the fifth bearing to prevent the lubricating oil from flowing out of the housing from the right side; at least one thirteenth oil hole is arranged on the output shaft, and the diameter of the thirteenth oil hole is large enough so that the lubricating oil entering the thirteenth oil hole will not be completely thrown out due to centrifugal force, ensuring that part of the lubricating oil can flow from the thirteenth oil hole into the second bearing between the input shaft and the output shaft; the planetary row of the transmission body is composed of a sun gear, a planet carrier, and a gear ring; the planet carrier is composed of a bracket, a planetary gear, a planetary gear shaft, The planetary gear shaft is composed of a third bearing, a fourth bearing and a second oil baffle plate; the second oil baffle plate is arranged on the right side of the planetary frame, the outer periphery of the second oil baffle plate is fixedly connected to the bracket and sealed, and the inner periphery is expanded outward, which is conducive to collecting lubricating oil, and the second oil baffle plate and the bracket form an oil groove; the two ends of the planetary gear shaft are fixedly connected to the bracket, and a second oil channel is arranged in the middle of the planetary gear shaft, one end of the second oil channel is closed, the other end is open and communicated with the oil groove, and the planetary gear shaft is radially provided with an eighth oil hole, a ninth oil hole and a tenth oil hole, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are all communicated with the second oil channel; the eighth, ninth and tenth oil holes are arranged radially on the planetary gear shaft, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are all communicated with the second oil channel; The sum of the diameters of the oil holes is not greater than the diameter of the second oil passage to ensure that each oil hole has sufficient lubricating oil passing through it. The planetary gear is connected to the planetary gear shaft in a rolling manner through the third bearing, and both ends of the planetary gear are connected to the bracket for relative rotation through the fourth bearing; the input shaft, output shaft, sun gear, planetary carrier, gear ring and other relatively rotating parts are all connected through the second bearing; a first oil chamber of the right housing is provided above the output shaft inside the housing and close to the oil groove, and the first oil chamber of the right housing is communicated with the thirteenth oil hole, the oil groove and the fifth bearing respectively through the fourteenth oil hole, and the fourteenth oil hole is inclined from the upper right to the lower left to increase the impact of the lubricating oil entering the thirteenth oil hole, ensuring that a certain amount of lubrication can reach the second bearing between the input shaft and the output shaft;At least one oil reservoir is provided on the upper part of the shell of the transmission body, and the oil reservoir is arranged inside or outside the shell. The oil inlet of the oil reservoir faces upward and is communicated with the inner cavity of the transmission body. The oil outlet of the oil reservoir is arranged at the bottom of the oil reservoir and is communicated with the upper part of the filter of the first oil chamber, including the upper part of the filter of the first oil chamber of the right shell. The oil outlet of the oil reservoir should not be too large, and its flow capacity plus the amount of oil splashed into the first oil chamber is greater than the sum of the oil outputs of the eleventh, fourteenth and fifteenth oil holes; at least one first oil chamber and at least one first oil chamber of the right shell are provided above the input shaft in the shell, and the first oil chamber is surrounded by the first oil baffle plate and the shell, and the upper part of the first oil baffle plate keeps a certain distance from the shell, An oil inlet is formed and the upper part of the first oil baffle is located low, which is convenient for the lubricating oil splashed at a low position to enter the first oil chamber. The remaining part is fixedly connected to the shell around the periphery, and the connection is sealed; at least one seventh oil hole is provided at the lower part of the shell, and the oil outlet of the seventh oil hole is higher than the bottom shell to prevent the sediment at the bottom from being stirred when the oil is discharged. At least one sixth oil hole is provided on the shell near the oil inlet of the oil reservoir, and the sixth oil hole and the seventh oil hole at the bottom are communicated with each other through an oil pipe or an oil channel processed on the shell; a filter is provided in the first oil chamber; at least one oil receiving plate is provided on the upper part of the shell, and the oil receiving plate is fixedly connected to the shell or to the mouth of the oil reservoir. The oil receiving plate is at the lowest position at one end close to the oil inlet of the oil reservoir and leads to the inside of the oil reservoir, which becomes The lubricating oil stirred up when the transmission parts or shifting elements of the transmission rotate can flow into the oil reservoir through the oil receiving plate, which is conducive to receiving more splashing lubricating oil; at least one first oil guide rib is processed on the right side and the right bottom of the first oil baffle plate, and the first oil guide rib is inclined from top to bottom toward the first bearing to increase the lubricating oil supply to the first bearing; at least one second oil guide rib is provided on the housing on the right side of the transmission body, and the second oil guide rib is located below the first oil chamber of the right housing, the fourteenth oil hole is located in the second oil guide rib and connected to the first oil chamber of the right housing, the second oil guide rib extends from the upper right to the lower left into the inner circle of the oil groove, but does not interfere with the bracket of the planetary carrier and the second oil baffle plate, and a hole is opened inside the lower section of the second oil guide rib to the fifth bearing The extended fifteenth oil hole is interconnected with the fourteenth oil hole, so that the lubricating oil can flow to the fifth bearing; the clutch and the brake are located at the outer periphery of the planetary gear inside the housing, and the clutch and brake friction element oil grooves are interconnected with the planetary gear through the fifth oil hole; the clutch is composed of a clutch drum, a clutch hub, a first friction plate and a first steel plate; the brake is composed of a second friction plate and a second steel plate, the second friction plate is slidably connected to one of the components of the planetary gear through an inner spline, and the second steel plate is slidably connected to the housing through an outer spline; the clutch drum, the clutch hub, the first friction plate and the first steel plate are respectively slidably connected or fixedly connected to the relevant components of the planetary gear according to the design intention of the transmission. ;

[0012] A working method of a planetary gear transmission lubrication system is carried out according to the following steps:

[0013] S1: When the clutch is combined with the brake and the brake is released, except for the second steel plate, all the shift actuators and transmission elements are in a rotating state. There are many elements stirring the oil, the stirring radius is large, and the splashing lubricating oil is large. A large amount of lubricating oil enters the oil reservoir and enters the first oil chamber through the filter, which greatly reduces the oil level in the transmission chamber and reduces the energy loss of stirring the oil.

[0014] S11: The lubricating oil in the oil reservoir enters the first oil passage from the oil reservoir outlet in sequence through the filter, the first oil chamber, the second oil chamber, and the first oil hole, and is thrown from the second oil hole and the third oil hole to the corresponding lubricated element and the oil tank under the action of gravity and centrifugal force. The lubricating oil thrown from the second oil hole is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake under the action of the centrifugal force of the lubricated element; the lubricating oil entering the oil tank from the third oil hole enters the second oil passage under the action of centrifugal force, and is thrown from the eighth oil hole, the ninth oil hole, and the tenth oil hole to the fourth bearing on the left, the third bearing in the middle, and the fourth bearing on the right, respectively. Part of the lubricating oil thrown to the fourth bearing is thrown from the fifth oil hole to the friction pair of the clutch and the brake; at this time, although most of the related components do not rotate relative to each other, once the gear is shifted and relatively rotated, sufficient lubrication can be guaranteed in real time;

[0015] S12: At this time, part or all of the planetary gear passes through the lubricating oil in the lower part of the housing during the rotation process, ensuring that each gear is kept lubricated at all times; the planetary carrier stirs the oil, and part of the lubricating oil enters the friction pair of the clutch and the brake from the fifth oil hole, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, and then flows along the first oil guide rib, the second oil guide rib, and the fifteenth oil hole to the first bearing and the fifth bearing respectively;

[0016] S13: When the oil level in the oil reservoir reaches the sixth oil hole, the oil will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area;

[0017] S2: When the brake clutch is disengaged, the brake, planetary gear brake elements and their connecting parts, and clutch related components stop rotating, while the input shaft, other clutch components, planetary gear non-brake elements and their connecting parts, and output shaft rotate. There are not many components that stir the oil, and the diameter of the components is not large. Not much oil can enter the oil reservoir from the oil reservoir port. The oil level in the transmission cavity is at a relatively high position. The rotating parts with small diameters can stir the oil. The first oil cavity with a low oil inlet position can collect more lubricating oil.

[0018] S21: The flow path of the lubricating oil entering the oil reservoir and the first oil chamber is the same as that described in S11 above;

[0019] S22: At this time, the planetary gear has both self-rotation and orbital states. Part or all of the planetary gear is stained with lubricating oil when passing through the lubricating oil in the lower part of the housing during the rotation process. Under the action of centrifugal force and the meshing process, the planetary gear adheres, so that the internal gear of the ring gear and the sun gear are also stained with lubricating oil, ensuring that all gears remain lubricated; the lubricating oil stirred by the planetary carrier will partially enter the friction pair of the clutch and the brake from the fifth oil hole under the action of centrifugal force, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle and the right housing, and then flows to the first bearing and the fifth bearing along the first oil guide rib, the second oil guide rib, and the fifteenth oil hole respectively;

[0020] S23: When the oil level in the oil reservoir reaches the sixth oil hole, it will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area.

[0021] Another working method of the planetary gear transmission lubrication system is carried out in the following steps:

[0022] S1: When the clutch is combined with the brake and the brake is released, except for the second steel plate, all the shift actuators and transmission elements are in a rotating state. There are many elements stirring the oil, the stirring radius is large, and the splashing lubricating oil is large. A large amount of lubricating oil enters the oil reservoir and enters the first oil chamber through the filter, which greatly reduces the oil level in the transmission chamber and reduces the energy loss of stirring the oil.

[0023] S11: The lubricating oil in the oil reservoir flows from the oil reservoir outlet through the filter, the first oil chamber, the eleventh oil hole, and the twelfth oil hole in sequence into the lubricated elements around the sun gear, and enters the second bearing between the oil tank and the input and output shafts through the first oil chamber, the fourteenth oil hole, and the thirteenth oil hole of the right housing, and is respectively thrown toward the corresponding lubricated elements and the oil tank under the action of gravity and centrifugal force. The lubricating oil thrown out from the twelfth oil hole is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake under the action of the centrifugal force of the lubricated elements; the lubricating oil entering the oil tank enters the second oil channel under the action of centrifugal force, and is respectively thrown from the eighth oil hole, the ninth oil hole, and the tenth oil hole to the fourth bearing on the left side, the third bearing in the middle, and the fourth bearing on the right side, and is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake; at this time, although most of the related components do not rotate relative to each other, once the gear is shifted and relatively rotated, sufficient lubrication can be guaranteed in real time;

[0024] S12: At this time, part or all of the planetary gear passes through the lubricating oil in the lower part of the housing during the rotation process, ensuring that each gear is kept lubricated at all times; the lubricating oil stirred by the planetary carrier will partially enter the friction pair of the clutch and the brake from the fifth oil hole under the action of centrifugal force, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, the first oil chamber of the right housing, and then flows along the first oil guide rib and the second oil guide rib, the fourteenth oil hole, and the fifteenth oil hole to the first bearing and the fifth bearing respectively;

[0025] S13: When the oil level in the oil reservoir reaches the sixth oil hole, the oil will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area;

[0026] S2: When the brake clutch is disengaged, the brake, planetary gear brake elements and their connecting parts, and clutch related components stop rotating, while the input shaft, other clutch components, planetary gear non-brake elements and their connecting parts, and output shaft rotate. There are not many components that stir the oil, and the diameter of the components is not large. Not much oil can enter the oil reservoir from the oil reservoir port. The oil level in the transmission cavity is at a relatively high position. The rotating parts with small diameters can stir the oil. The first oil cavity with a low oil inlet position can collect more lubricating oil.

[0027] S21: The flow path of the lubricating oil entering the oil reservoir and the first oil chamber is the same as that described in S11 above;

[0028] S22: At this time, the planetary gear has both self-rotation and orbital states. Part or all of the planetary gear is stained with lubricating oil when passing through the lubricating oil in the lower part of the housing during the rotation process. Under the action of centrifugal force and the meshing process, the planetary gear adheres, so that the internal gear of the ring gear and the sun gear are also stained with lubricating oil, ensuring that all gears remain lubricated; the planetary carrier stirs the oil, and part of the lubricating oil enters the friction pair of the clutch and the brake from the fifth oil hole, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, the first oil chamber of the right housing, and then flows along the first oil guide rib and the second oil guide rib, the fourteenth oil hole, and the fifteenth oil hole to the first bearing and the fifth bearing respectively;

[0029] S23: When the oil level in the oil reservoir reaches the sixth oil hole, it will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area.

[0030] Compared with the prior art, the present invention has the following beneficial effects: the planetary gear transmission lubrication system does not use an oil pump and a control device, thus avoiding the risk of failure, saving space, cost and energy; the lubrication passages lead to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the inner and outer ends of the input shaft and the output shaft. When the transmission speed is high, the amount of oil thrown away under the action of centrifugal force is also large, and the required oil supply is correspondingly large. At this time, the transmission has a high speed, the amount of oil splashed is large, the oil entering the oil chamber and the oil reservoir is also large, and the amount of oil supplied to the lubricating components is also large. At low speeds, the lubricating oil demand is small and the supply is also small, so the amount of oil supplied can meet the demand. The lubrication and oil supply of the device of the present invention is not greatly affected by temperature, and the lubricated parts are fully and stably lubricated, avoiding the instability of lubrication and oil supply caused by oil temperature problems.

[0031] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of Example 2 of the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of Example 3 of the present invention.

[0035] Figure 4 Schematic diagram of the structure of the planetary gear shaft. Description of the drawings:

[0037] Housing 1, oil reservoir 2, input shaft 3, first oil passage 4, first oil hole 5, second oil chamber 6, second oil hole 7, third oil hole 8, oil groove 9, first bearing 10, oil seal 11, second bearing 12, fifth bearing 13, fourth oil hole 14, sun gear 15, planetary gear 16, planetary gear shaft 17, third bearing 18, fourth bearing 19, second oil baffle 20, bracket 21, second oil passage 22, eighth oil hole 23, ninth oil hole 24, tenth oil hole 25, oil inlet 26, oil outlet 27 of oil reservoir, first oil chamber 28, seventh oil hole 29, first Sixth oil hole 30, filter 31, oil receiving plate 32, first oil guide rib 33, first oil baffle 34, second oil guide rib 35, clutch 36, brake 37, fifth oil hole 38, eleventh oil hole 39, twelfth oil hole 40, thirteenth oil hole 41, fourteenth oil hole 42, oil hole 43, third oil chamber 44, piston 45, sealing ring 46, air chamber 47, air inlet 48, spring 49, planetary row 50, output shaft 51, first oil chamber 52 of right housing, fifteenth oil hole 53, sixteenth oil hole 54, spline clearance oil groove 55, clutch drum 56. DETAILED DESCRIPTION

[0038] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description.

[0039] Embodiment 1:

[0040] like Figure 1 , 4 As shown, a planetary gear transmission lubrication system includes a housing 1 of the transmission body, and a lubrication passage connected to an oil reservoir 2 is provided inside the housing, and the lubrication passage leads to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the outer ends of the input shaft and the output shaft 51 inside the housing.

[0041] In the embodiment of the present invention, the lubrication passage passes through the internal oil passage of the input shaft 3 .

[0042] In the embodiment of the present invention, a first oil passage is provided in the middle of the input shaft, and the left end or both ends of the first oil passage are closed. At least one first oil hole 5 is provided at the left end of the first oil passage 4, one end of the first oil hole is interconnected with the first oil passage, and the other end is connected to the second oil chamber 6, the second oil chamber is connected to the first oil chamber, and the first oil chamber is connected to the oil reservoir. At least one second oil hole 7 is provided on the right side of the first oil hole, one end of the second oil hole is interconnected with the first oil passage, and the other end faces the lubricated element around the sun gear. At least one third oil hole 8 is also provided on the right side of the first oil hole, one end of the third oil hole is interconnected with the first oil passage, and the other end faces the oil groove 9 of the planetary carrier. Preferably, when both ends of the first oil passage are closed, the sum of the diameters of the second and third oil holes is not greater than the first oil hole to ensure that lubricating oil passes through each oil hole.

[0043] In the embodiment of the present invention, the input shaft is rollingly connected with the housing through the first bearing 10, an oil seal 11 is arranged on the left side of the first bearing to prevent the lubricating oil from flowing out of the housing from the left side, and a bearing cover is arranged on the right side of the first bearing, so that an axial seal is formed between the oil seal and the bearing cover of the first bearing and a second oil chamber is formed with the housing and the input shaft; one end of the input shaft in the housing is sleeved in the middle of one end of the output shaft in the housing and is connected through the second bearing 12; the output shaft is rollingly connected with the housing through the fifth bearing 13, and an oil seal is arranged on the right side of the fifth bearing to prevent the lubricating oil from flowing out of the housing from the right side; At least one fourth oil hole 14 is provided on the output shaft on the same vertical plane as the third oil hole, and the lubricating oil is thrown from the third oil hole through the fourth oil hole into the oil groove of the planetary carrier; the planetary row 50 of the transmission body is composed of a sun gear 15, a planetary carrier, and a ring gear; the planetary carrier is composed of a bracket, a planetary gear 16, a planetary gear shaft 17, a third bearing 18, a fourth bearing 19 and a second oil baffle plate 20; the second oil baffle plate is arranged on the right side of the planetary carrier, the outer periphery of the second oil baffle plate is fixedly connected to the bracket 21 and sealed, and the inner periphery is expanded outward, which is conducive to collecting lubricating oil, and the second oil baffle plate and the bracket form an oil groove.

[0044] In the embodiment of the present invention, both ends of the planetary gear shaft are fixedly connected to the bracket, a second oil passage 22 is provided in the middle of the planetary gear shaft, one end of the second oil passage is closed, the other end is open and communicates with the oil groove, an eighth oil hole 23, a ninth oil hole 24 and a tenth oil hole 25 are radially provided on the planetary gear shaft, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are communicated with the second oil passage; the sum of the diameters of the eighth, ninth and tenth oil holes is not greater than the diameter of the second oil passage to ensure that each oil hole has sufficient lubricating oil passing through, the planetary gear is rollingly connected to the planetary gear shaft through the third bearing, and both ends of the planetary gear are respectively connected to the bracket for relative rotation through the fourth bearing; the input shaft, output shaft, sun gear, planet carrier and ring gear and other relatively rotating parts are all connected through the second bearing.

[0045] In the embodiment of the present invention, at least one oil reservoir is provided on the upper part of the shell of the transmission body, and the oil reservoir is arranged inside or outside the shell. The oil inlet 26 of the oil reservoir faces upward and is interconnected with the inner cavity of the transmission body. The oil outlet 27 of the oil reservoir is arranged at the bottom of the oil reservoir and is interconnected with the filter above the first oil chamber 28. The oil outlet of the oil reservoir should not be too large, and its flow capacity plus the amount of oil splashed into the first oil chamber is greater than the oil output of the second and third oil holes. At least one first oil chamber is provided above the input shaft in the shell, and the first oil chamber is surrounded by the first oil baffle plate 34 and the shell. The upper part of the first oil baffle plate maintains a certain distance from the shell to form an oil inlet, and the upper part of the first oil baffle plate is at a lower position. It is convenient for the lubricating oil splashing at a low position to enter the first oil chamber, and the remaining part is fixedly connected to the shell around, and the connection is sealed. The oil outlet of the first oil chamber is arranged at the bottom of the first oil chamber and communicates with the second oil chamber; at least one seventh oil hole 29 is arranged at the lower part of the shell, and the oil outlet of the seventh oil hole is higher than the bottom shell to prevent the sediment at the bottom from being stirred when the oil is discharged. At least one sixth oil hole 30 is arranged on the shell near the oil inlet of the oil reservoir, and the sixth oil hole and the seventh oil hole at the bottom are communicated through an oil pipe or an oil channel processed on the shell; a filter 31 is arranged in the first oil chamber; the first oil chamber can be processed by the shell, and can also be surrounded by the first oil baffle plate and the shell, preferably surrounded by the first oil baffle plate and the shell.

[0046] In the embodiment of the present invention, at least one oil receiving plate 32 is provided in the upper inner part of the shell. The specific position, shape and size of the oil receiving plate are determined according to the purpose of receiving more splashing lubricating oil. The oil receiving plate is fixedly connected to the shell or to the mouth of the oil reservoir. The oil receiving plate is at the lowest position at one end close to the oil inlet of the oil reservoir and leads to the inside of the oil reservoir. The lubricating oil stirred up when the transmission transmission parts or shifting elements rotate can flow into the oil reservoir through the oil receiving plate, which is conducive to receiving more splashing lubricating oil. A first oil guide rib 33 is processed on the bottom of the right side of the first oil baffle plate. The first oil guide rib is inclined from top to bottom toward the first bearing. The splashing lubricating oil can flow along the first oil guide rib to the first bearing for lubrication. At least one second oil guide rib 35 is provided on the shell on the right side of the transmission body. The second oil guide rib extends from the upper right to the lower left into the inner circle of the oil groove, but does not interfere with the bracket of the planetary carrier and the second oil baffle plate. The lower section of the second oil guide rib is opened inside to extend to the fifth bearing. The fifteenth oil hole 53 allows the lubricating oil to flow to the fifth bearing; the clutch and the brake are located at the outer periphery of the planetary row inside the housing, and the oil grooves of the friction elements of the clutch 36 and the brake 37 are connected to the planetary row through the fifth oil hole 38; the clutch is composed of a clutch drum, a clutch hub, a first friction plate and a first steel plate; the brake is composed of a second friction plate and a second steel plate, the second friction plate is slidably connected to one of the components of the planetary row through an inner spline, and the second steel plate is slidably connected to the housing through an outer spline; the clutch drum, the clutch hub, the first friction plate and the first steel plate are respectively slidably connected or fixedly connected to the relevant components of the planetary row according to the design intention of the transmission; at least one sixteenth oil hole 54 is opened on the clutch drum 56, and the lubricating oil entering the clutch friction pair is thrown out from the sixteenth oil hole and returned to the oil cavity in the housing; the spline is provided with a spline clearance oil groove 55, and part of the lubricating oil entering the brake flows back to the oil cavity in the housing from the spline clearance oil groove.

[0047] Embodiment 2:

[0048] like Figure 2 , 4As shown, another planetary gear transmission lubrication system includes a shell of the transmission body, and a lubrication passage connected to the oil reservoir is provided inside the shell, and the lubrication passage leads to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the outer ends of the input shaft and the output shaft inside the shell; the lubrication passage does not pass through the internal oil channel of the input shaft; the oil outlet of the oil reservoir is connected to the first oil chamber, and the first oil chamber is surrounded by the shell and the first oil baffle plate on the right side. The first oil chamber leads to the lubricated elements around the sun gear and other related components of the planetary gear through the eleventh oil hole 39 on the first oil baffle plate and the twelfth oil hole 40 on the left end face of the planetary gear; the input shaft is rollingly connected to the shell through the first bearing An oil seal is arranged on the left side of the first bearing to prevent the lubricating oil from flowing out of the housing from the left side; one end of the input shaft in the housing is sleeved in the middle of one end of the output shaft in the housing and is connected through the second bearing; the output shaft is rollingly connected to the housing through the fifth bearing, and an oil seal is arranged on the right side of the fifth bearing to prevent the lubricating oil from flowing out of the housing from the right side; at least one thirteenth oil hole 41 is arranged on the output shaft, and the diameter of the thirteenth oil hole is large enough so that the lubricating oil entering the thirteenth oil hole will not be completely thrown out due to centrifugal force, ensuring that part of the lubricating oil can flow from the thirteenth oil hole into the second bearing between the input shaft and the output shaft; the planetary row of the transmission body is composed of a sun gear, a planet carrier, and a gear ring; the planet carrier is composed of a bracket, a planetary gear ... The planetary gear axle is composed of a wheel axle, a third bearing, a fourth bearing and a second oil baffle plate; the second oil baffle plate is arranged on the right side of the planetary carrier, the outer periphery of the second oil baffle plate is fixedly connected to the bracket and sealed, and the inner periphery is expanded outward, which is conducive to collecting lubricating oil, and the second oil baffle plate and the bracket form an oil groove; the two ends of the planetary gear axle are fixedly connected to the bracket, and a second oil channel is arranged in the middle of the planetary gear axle, one end of the second oil channel is closed, the other end is open and communicated with the oil groove, and the planetary gear axle is radially provided with an eighth oil hole, a ninth oil hole and a tenth oil hole, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are all communicated with the second oil channel; the eighth, ninth and tenth oil holes are connected to the planetary gear axle. The sum of the hole diameters is not greater than the second oil passage diameter to ensure that each oil hole has sufficient lubricating oil passing through. The planetary gear is connected to the planetary gear shaft in a rolling manner through the third bearing, and both ends of the planetary gear are connected to the bracket for relative rotation through the fourth bearing; the input shaft, output shaft, sun gear, planetary carrier, gear ring and other relatively rotating parts are all connected through the second bearing; a right housing first oil chamber 52 is provided above the output shaft inside the housing and close to the oil groove, and the right housing first oil chamber is communicated with the thirteenth oil hole, the oil groove and the fifth bearing through the fourteenth oil hole 42, and the fourteenth oil hole is inclined from the upper right to the lower left to increase the impact of the lubricating oil entering the thirteenth oil hole, ensuring that a certain amount of lubrication can reach the second bearing between the input shaft and the output shaft;At least one oil reservoir is provided on the upper part of the shell of the transmission body, and the oil reservoir is arranged inside or outside the shell. The oil inlet of the oil reservoir faces upward and is communicated with the inner cavity of the transmission body. The oil outlet of the oil reservoir is arranged at the bottom of the oil reservoir and is communicated with the top of the filter of the first oil chamber, including the top of the filter of the first oil chamber of the right shell. The oil outlet of the oil reservoir should not be too large, and its flow capacity plus the amount of oil splashing into the first oil chamber is greater than the sum of the oil outputs of the eleventh, fourteenth and fifteenth oil holes; at least one first oil chamber and at least one first oil chamber of the right shell are provided above the input shaft in the shell, and the first oil chamber is surrounded by a first oil baffle plate and the shell. The upper part of the first oil baffle plate maintains a certain distance from the shell to form an oil inlet and the upper part of the first oil baffle plate is at a lower position, which is convenient for low-position The splashed lubricating oil enters the first oil chamber, and the periphery of the remaining part is fixedly connected to the shell, and the connection is sealed; at least one seventh oil hole is provided at the lower part of the shell, and the oil outlet of the seventh oil hole is higher than the bottom shell to prevent the sediment at the bottom from being stirred when the oil is discharged. At least one sixth oil hole is provided on the shell near the oil inlet of the oil reservoir, and the sixth oil hole and the seventh oil hole at the bottom are communicated with each other through an oil pipe or an oil channel processed on the shell; a filter is provided in the first oil chamber; at least one oil receiving plate is provided at the upper part of the shell, and the oil receiving plate is fixedly connected to the shell or to the mouth of the oil reservoir. The oil receiving plate is at the lowest position at one end of the oil inlet of the oil reservoir and leads to the inside of the oil reservoir. The lubricating oil stirred up when the transmission transmission parts or shifting elements rotate can flow into the inside of the oil reservoir through the oil receiving plate, which is conducive to receiving more splashed lubricating oil. The first oil baffle plate is provided with at least one first oil guide rib on the right side and the right bottom, and the first oil guide rib is inclined from top to bottom toward the first bearing to increase the lubricating oil supply to the first bearing; at least one second oil guide rib is provided on the casing on the right side of the transmission body, and the second oil guide rib is located below the first oil chamber of the right casing, and the fourteenth oil hole is located in the second oil guide rib and is connected to the first oil chamber of the right casing, and the second oil guide rib extends from the upper right to the lower left into the inner circle of the oil groove, but does not interfere with the bracket of the planetary carrier and the second oil baffle plate, and the fifteenth oil hole extending to the fifth bearing is opened inside the lower section of the second oil guide rib, and the fifteenth oil hole is communicated with the fourteenth oil hole so that the lubricating oil can flow to the fifth bearing; the clutch and the brake are located on the outer periphery of the planetary row inside the casing, and the clutch and the brake The friction element oil groove of the gearbox is interconnected with the planetary gear through the fifth oil hole; the clutch is composed of a clutch drum, a clutch hub, a first friction plate and a first steel plate; the brake is composed of a second friction plate and a second steel plate, the second friction plate is slidably connected to one of the components of the planetary gearbox through an inner spline, and the second steel plate is slidably connected to the housing through an outer spline; the clutch drum, the clutch hub, the first friction plate and the first steel plate are respectively slidably connected or fixedly connected to the relevant components of the planetary gearbox according to the design intention of the transmission; at least one sixteenth oil hole is opened on the clutch drum 56, and the lubricating oil entering the clutch friction pair is thrown out from the sixteenth oil hole and returned to the oil cavity in the housing; the spline has a spline gap oil groove, and part of the lubricating oil entering the brake flows back to the oil cavity in the housing from the spline gap oil groove. ;

[0049] Embodiment 3: Embodiment 3 is different from Embodiments 1 and 2 in that the oil reservoir is placed at the bottom. Due to space limitation or splashing lubricating oil that cannot fully enter the upper oil reservoir, an oil level regulator can be set at the bottom. The oil level regulator is composed of the following: oil hole 43, third oil chamber 44, piston 45, sealing ring 46, air chamber 47 and air inlet 48; the air inlet is connected to the air chamber, the piston with sealing ring separates the air chamber and the third oil chamber, the piston is connected to the housing via spring 49, the third oil chamber is between the piston and the housing and an oil hole is provided to connect to the inside of the housing. The air chamber can be pressurized by air intake to push the piston to pump oil.

[0050] Embodiment 4: Embodiment 4 is different from Embodiment 2 in that the lubrication passage does not pass through the internal oil passages of the input shaft and the planetary gear shaft, and a second oil baffle is not provided. The third bearing can be a full needle roller bearing without a retaining cage, or a needle roller bearing with a retaining cage, but the retaining cage is smaller in width to facilitate the passage of lubricating oil. The two ends of the planetary gear are respectively connected to the bracket for relative rotation through the fourth bearing, and the gap between the two ends of the planetary gear and the bracket still has a certain space after installing the two fourth bearings, which is convenient for the planetary carrier to enter the oil surface during the rotation process. Under the action of pressure, the lubricating oil can enter the fourth bearing from the gap between the fourth bearing and the planetary gear or the bracket, and then enter the third bearing for lubrication.

[0051] Embodiment 1 The working method of the planetary gear transmission lubrication system is carried out according to the following steps:

[0052] S1: When the clutch is combined with the brake and the brake is released, except for the second steel plate, all the shift actuators and transmission elements are in a rotating state. There are many elements stirring the oil, the stirring radius is large, and the splashing lubricating oil is large. A large amount of lubricating oil enters the oil reservoir and enters the first oil chamber through the filter, which greatly reduces the oil level in the transmission chamber and reduces the energy loss of stirring the oil.

[0053] S11: The lubricating oil in the oil reservoir enters the first oil passage from the oil reservoir outlet in sequence through the filter, the first oil chamber, the second oil chamber, and the first oil hole, and is thrown from the second oil hole and the third oil hole to the corresponding lubricated element and the oil tank under the action of gravity and centrifugal force. The lubricating oil thrown from the second oil hole is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake under the action of the centrifugal force of the lubricated element; the lubricating oil entering the oil tank from the third oil hole enters the second oil passage under the action of centrifugal force, and is thrown from the eighth oil hole, the ninth oil hole, and the tenth oil hole to the fourth bearing on the left, the third bearing in the middle, and the fourth bearing on the right, respectively. Part of the lubricating oil thrown to the fourth bearing is thrown from the fifth oil hole to the friction pair of the clutch and the brake; at this time, although most of the related components do not rotate relative to each other, once the gear is shifted and relatively rotated, sufficient lubrication can be guaranteed in real time;

[0054] S12: At this time, part or all of the planetary gear passes through the lubricating oil in the lower part of the housing during the rotation process, ensuring that each gear is kept lubricated at all times; the planetary carrier stirs the oil, and part of the lubricating oil enters the friction pair of the clutch and the brake from the fifth oil hole, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, and then flows along the first oil guide rib, the second oil guide rib, and the fifteenth oil hole to the first bearing and the fifth bearing respectively;

[0055] S13: When the oil level in the oil reservoir reaches the sixth oil hole, the oil will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area;

[0056] S2: When the brake clutch is disengaged, the brake, planetary gear brake elements and their connecting parts, and clutch related components stop rotating, while the input shaft, other clutch components, planetary gear non-brake elements and their connecting parts, and output shaft rotate. There are not many components that stir the oil, and the diameter of the components is not large. Not much oil can enter the oil reservoir from the oil reservoir port. The oil level in the transmission cavity is at a relatively high position. The rotating parts with small diameters can stir the oil. The first oil cavity with a low oil inlet position can collect more lubricating oil.

[0057] S21: The flow path of the lubricating oil entering the oil reservoir and the first oil chamber is the same as that described in S11 above;

[0058] S22: At this time, the planetary gear has both self-rotation and orbital states. Part or all of the planetary gear is stained with lubricating oil when passing through the lubricating oil in the lower part of the housing during the rotation process. Under the action of centrifugal force and the meshing process, the planetary gear adheres, so that the internal gear of the ring gear and the sun gear are also stained with lubricating oil, ensuring that all gears remain lubricated; the lubricating oil stirred by the planetary carrier will partially enter the friction pair of the clutch and the brake from the fifth oil hole under the action of centrifugal force, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle and the right housing, and then flows to the first bearing and the fifth bearing along the first oil guide rib, the second oil guide rib, and the fifteenth oil hole respectively;

[0059] S23: When the oil level in the oil reservoir reaches the sixth oil hole, it will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area.

[0060] Embodiment 2 The working method of the planetary gear transmission lubrication system is carried out according to the following steps:

[0061] S1: When the clutch is combined with the brake and the brake is released, except for the second steel plate, all the shift actuators and transmission elements are in a rotating state. There are many elements stirring the oil, the stirring radius is large, and the splashing lubricating oil is large. A large amount of lubricating oil enters the oil reservoir and enters the first oil chamber through the filter, which greatly reduces the oil level in the transmission chamber and reduces the energy loss of stirring the oil.

[0062] S11: The lubricating oil in the oil reservoir flows from the oil reservoir outlet through the filter, the first oil chamber, the eleventh oil hole, and the twelfth oil hole in sequence into the lubricated elements around the sun gear, and enters the second bearing between the oil tank and the input and output shafts through the first oil chamber, the fourteenth oil hole, and the thirteenth oil hole of the right housing, and is respectively thrown toward the corresponding lubricated elements and the oil tank under the action of gravity and centrifugal force. The lubricating oil thrown out from the twelfth oil hole is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake under the action of the centrifugal force of the lubricated elements; the lubricating oil entering the oil tank enters the second oil channel under the action of centrifugal force, and is respectively thrown from the eighth oil hole, the ninth oil hole, and the tenth oil hole to the fourth bearing on the left side, the third bearing in the middle, and the fourth bearing on the right side, and is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake; at this time, although most of the related components do not rotate relative to each other, once the gear is shifted and relatively rotated, sufficient lubrication can be guaranteed in real time;

[0063] S12: At this time, part or all of the planetary gear passes through the lubricating oil in the lower part of the housing during the rotation process, ensuring that each gear is kept lubricated at all times; the lubricating oil stirred by the planetary carrier will partially enter the friction pair of the clutch and the brake from the fifth oil hole under the action of centrifugal force, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, the first oil chamber of the right housing, and then flows along the first oil guide rib and the second oil guide rib, the fourteenth oil hole, and the fifteenth oil hole to the first bearing and the fifth bearing respectively;

[0064] S13: When the oil level in the oil reservoir reaches the sixth oil hole, the oil will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area;

[0065] S2: When the brake clutch is disengaged, the brake, planetary gear brake elements and their connecting parts, and clutch related components stop rotating, while the input shaft, other clutch components, planetary gear non-brake elements and their connecting parts, and output shaft rotate. There are not many components that stir the oil, and the diameter of the components is not large. Not much oil can enter the oil reservoir from the oil reservoir port. The oil level in the transmission cavity is at a relatively high position. The rotating parts with small diameters can stir the oil. The first oil cavity with a low oil inlet position can collect more lubricating oil.

[0066] S21: The flow path of the lubricating oil entering the oil reservoir and the first oil chamber is the same as that described in S11 above;

[0067] S22: At this time, the planetary gear has both self-rotation and orbital states. Part or all of the planetary gear is stained with lubricating oil when passing through the lubricating oil in the lower part of the housing during the rotation process. Under the action of centrifugal force and the meshing process, the planetary gear adheres, so that the internal gear of the ring gear and the sun gear are also stained with lubricating oil, ensuring that all gears remain lubricated; the planetary carrier stirs the oil, and part of the lubricating oil enters the friction pair of the clutch and the brake from the fifth oil hole, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, the first oil chamber of the right housing, and then flows along the first oil guide rib and the second oil guide rib, the fourteenth oil hole, and the fifteenth oil hole to the first bearing and the fifth bearing respectively;

[0068] S23: When the oil level in the oil reservoir reaches the sixth oil hole, it will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area.

[0069] The lubricating oil can circulate at multiple points, making the circulation of the lubricating oil more complete and extending the oil change time better; the lubricating oil is in more complete contact with the shell and is in contact with the shell during the flow process, which is more conducive to heat dissipation; the oil reservoir, oil chamber, oil channel and oil outlet can be flexibly arranged at multiple points, making lubrication, heat dissipation and circulation more ideal without significantly increasing the cost and volume.

[0070] The present invention is not limited to the above-mentioned best implementation mode. Anyone can derive other forms of planetary gear transmission lubrication systems and working methods under the enlightenment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A planetary gear transmission lubrication system, comprising a transmission housing, characterized in that: A lubrication passage connected to the oil reservoir is provided inside the shell, and the lubrication passage leads to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the outer ends of the input shaft and the output shaft inside the shell; the lubrication passage passes through the oil passage inside the input shaft; a first oil passage is provided in the middle part of the input shaft, and the left end or both ends of the first oil passage are closed, and at least one first oil hole is provided at the left end of the first oil passage, one end of the first oil hole is interconnected with the first oil passage, and the other end is connected to the second oil chamber, the second oil chamber is connected to the first oil chamber, and the first oil chamber is connected to the oil reservoir, at least one second oil hole is provided on the right side of the first oil hole, one end of the second oil hole is interconnected with the first oil passage, and the other end faces the lubricated elements around the sun gear, and at least one third oil hole is also provided on the right side of the first oil hole, one end of the third oil hole is interconnected with the first oil passage, and the other end faces the oil groove of the planetary carrier. When both ends of the first oil passage are closed, the sum of the diameters of the second and third oil holes is not greater than the first The first bearing is provided with an oil seal on the left side of the first bearing to prevent the lubricating oil from flowing out of the housing from the left side, and a bearing cover is provided on the right side of the first bearing to form an axial seal between the oil seal and the bearing cover of the first bearing and to form a second oil chamber with the housing and the input shaft; one end of the input shaft in the housing is sleeved in the middle of one end of the output shaft in the housing and connected through the second bearing; the output shaft is connected to the housing through the fifth bearing, and an oil seal is provided on the right side of the fifth bearing to prevent the lubricating oil from flowing out of the housing from the right side; at least one fourth oil hole is provided on the output shaft on the same vertical plane as the third oil hole, and the lubricating oil is thrown from the third oil hole to the oil groove of the planetary carrier through the fourth oil hole; the planetary row of the transmission body is composed of a sun gear, a planetary carrier, and a gear ring; the planetary carrier is composed of a bracket, a planetary gear, a planetary gear shaft, a third bearing, a fourth bearing, and a second oil baffle; The second oil baffle plate is arranged on the right side of the planetary frame, the outer periphery of the second oil baffle plate is fixedly connected to the bracket and sealed, and the inner periphery is expanded outward, which is conducive to collecting lubricating oil, and the second oil baffle plate and the bracket form an oil groove; the two ends of the planetary gear shaft are fixedly connected to the bracket, and a second oil channel is arranged in the middle of the planetary gear shaft, one end of the second oil channel is closed, the other end is open and communicated with the oil groove, and the planetary gear shaft is radially provided with an eighth oil hole, a ninth oil hole and a tenth oil hole, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are communicated with the second oil channel; the sum of the diameters of the eighth, ninth and tenth oil holes is not greater than the diameter of the second oil channel to ensure that lubricating oil passes through each oil hole, and the planetary gear passes through the third bearing The gears are connected in a rolling manner with the planetary gear shaft, and both ends of the planetary gears are connected in relative rotation with the bracket through fourth bearings; the input shaft, output shaft, sun gear, planetary carrier and gear ring are connected in relative rotation with the second bearing; at least one oil reservoir is provided on the upper part of the shell of the transmission body, and the oil reservoir is arranged inside or outside the shell, the oil inlet of the oil reservoir faces upward and communicates with the inner cavity of the transmission body, and the oil outlet of the oil reservoir is arranged at the bottom of the oil reservoir and communicates with the filter above the first oil chamber; at least one first oil chamber is provided above the input shaft in the shell, and the first oil chamber is surrounded by a first oil baffle plate and the shell, the upper part of the first oil baffle plate keeps a certain distance from the shell to form an oil inlet, and the upper part of the first oil baffle plate is located at a low position, which is convenient for the lubricating oil splashed at a low position to enter the first oil chamber, and the surrounding of the remaining part is The shell and the casing are fixedly connected, and the connection is sealed. The oil outlet of the first oil chamber is arranged at the bottom of the first oil chamber and communicates with the second oil chamber; at least one seventh oil hole is arranged at the lower part of the shell, and the oil outlet of the seventh oil hole is higher than the bottom shell to prevent the sediment at the bottom from being stirred when the oil is discharged. At least one sixth oil hole is arranged on the shell near the oil inlet of the oil reservoir, and the sixth oil hole and the seventh oil hole at the bottom are communicated with each other through an oil pipe or an oil channel processed on the shell; a filter is arranged in the first oil chamber; at least one oil receiving plate is arranged at the upper part of the shell, and the oil receiving plate is fixedly connected to the shell or to the mouth of the oil reservoir. The oil receiving plate is at the lowest position at one end near the oil inlet of the oil reservoir and leads to the inside of the oil reservoir. The lubricating oil stirred up when the transmission transmission parts or shifting elements rotate can flow into the inside of the oil reservoir through the oil receiving plate, which is beneficial to more Receive splashing lubricating oil; a first oil guide rib is processed on the bottom of the right side of the first oil baffle plate, and the first oil guide rib is inclined from top to bottom toward the first bearing, and the splashing lubricating oil can flow to the first bearing along the first oil guide rib for lubrication; at least one second oil guide rib is provided on the housing on the right side of the transmission body, and the second oil guide rib extends from the upper right to the lower left into the inner circle of the oil groove, but does not interfere with the bracket of the planetary carrier and the second oil baffle plate, and a fifteenth oil hole extending to the fifth bearing is opened inside the lower section of the second oil guide rib, so that the lubricating oil can flow to the fifth bearing; the clutch and the brake are located on the outer periphery of the planetary row inside the housing, and the clutch and brake friction element oil grooves and the planetary row are interconnected through the fifth oil hole; the clutch is composed of a clutch drum, a clutch hub, a first friction plate and a first steel plate;The brake is composed of a second friction plate and a second steel plate. The second friction plate is slidably connected to one of the components of the planetary gear through the inner spline, and the second steel plate is slidably connected to the housing through the outer spline; the clutch drum, clutch hub, first friction plate and first steel plate are slidably connected or fixedly connected to the relevant components of the planetary gear according to the design intention of the transmission. ; 2. A planetary gear transmission lubrication system, comprising a transmission housing, characterized in that: A lubrication passage connected to the oil reservoir is provided inside the housing, and the lubrication passage leads to the lubricated elements around the sun gear of the transmission body, the lubricated elements around the planetary gear shaft, and the lubricated elements around the outer ends of the input shaft and the output shaft inside the housing; the lubrication passage does not pass through the oil channel inside the input shaft; the oil outlet of the oil reservoir is connected to the first oil chamber, and the first oil chamber is surrounded by the housing and the first oil baffle plate on the right side. The first oil chamber leads to the lubricated elements around the sun gear and other related components of the planetary gear through the eleventh oil hole on the first oil baffle plate and the twelfth oil hole on the left end face of the planetary gear; the input shaft is rollingly connected to the housing through the first bearing, and an oil seal is provided on the left side of the first bearing to prevent the lubricating oil from flowing out from the left side to the housing outside the body; one end of the input shaft in the housing is sleeved in the middle of one end of the output shaft in the housing and is connected through the second bearing; the output shaft is rollingly connected to the housing through the fifth bearing, and an oil seal is arranged on the right side of the fifth bearing to prevent the lubricating oil from flowing out of the housing from the right side; at least one thirteenth oil hole is arranged on the output shaft, and the thirteenth oil hole has a large diameter, and the lubricating oil entering the thirteenth oil hole will not be thrown out due to centrifugal force, ensuring that part of the lubricating oil can flow from the thirteenth oil hole into the second bearing between the input shaft and the output shaft; the planetary row of the transmission body is composed of a sun gear, a planet carrier, and a gear ring; the planet carrier is composed of a bracket, a planetary gear, a planetary gear shaft, a third bearing, a fourth bearing, and a second oil baffle; The second oil baffle plate is arranged on the right side of the planetary frame, the outer periphery of the second oil baffle plate is fixedly connected to the bracket and sealed, and the inner periphery is expanded outwardly, which is conducive to collecting lubricating oil, and the second oil baffle plate and the bracket form an oil groove; the two ends of the planetary shaft are fixedly connected to the bracket, and a second oil channel is arranged in the middle of the planetary shaft, one end of the second oil channel is closed, the other end is open and communicated with the oil groove, and the planetary shaft is radially provided with an eighth oil hole, a ninth oil hole and a tenth oil hole, one end of the eighth oil hole faces the fourth bearing on the left, one end of the ninth oil hole faces the third bearing in the middle, and one end of the tenth oil hole faces the fourth bearing on the right, and the other ends of these three oil holes are communicated with the second oil channel; the sum of the diameters of the eighth, ninth and tenth oil holes is not greater than the diameter of the second oil channel to ensure that each oil hole is The lubricating oil passes through, and the planetary gear is rollingly connected with the planetary gear shaft through the third bearing, and the two ends of the planetary gear are respectively connected with the bracket for relative rotation through the fourth bearing; the input shaft, output shaft, sun gear, planetary carrier and gear ring relative rotating parts are all connected through the second bearing; a right housing first oil chamber is provided above the output shaft inside the housing and close to the oil groove, and the right housing first oil chamber is interconnected with the thirteenth oil hole, the oil groove and the fifth bearing through the fourteenth oil hole, and the fourteenth oil hole is inclined from the upper right to the lower left to increase the impact of the lubricating oil entering the thirteenth oil hole, so as to ensure that a certain amount of lubrication can reach the second bearing between the input shaft and the output shaft; at least one oil reservoir is provided on the upper part of the housing of the transmission body, and the oil reservoir is arranged inside or outside the housing, The oil inlet of the oil reservoir faces upward and communicates with the inner cavity of the transmission body. The oil outlet of the oil reservoir is arranged at the bottom of the oil reservoir and communicates with the top of the filter of the first oil chamber, including the top of the filter of the first oil chamber of the right housing. At least one first oil chamber and at least one first oil chamber of the right housing are provided above the input shaft in the housing. The first oil chamber is surrounded by a first oil baffle plate and the housing. The upper part of the first oil baffle plate is kept at a certain distance from the housing to form an oil inlet. The upper part of the first oil baffle plate is located low, which is convenient for the lubricating oil splashed at a low position to enter the first oil chamber. The periphery of the remaining part is fixedly connected to the housing, and the connection is sealed. At least one seventh oil hole is provided at the lower part of the housing. The oil outlet of the seventh oil hole is higher than the bottom housing to prevent the sediment at the bottom from being stirred when the oil is discharged. The oil reservoir has at least one sixth oil hole on its shell near the oil inlet, and the sixth oil hole is connected to the seventh oil hole at the bottom through an oil pipe or an oil channel processed on the shell; a filter is provided in the first oil chamber; at least one oil receiving plate is provided in the upper inner part of the shell, and the oil receiving plate is fixedly connected to the shell or to the mouth of the oil reservoir, and the oil receiving plate is at the lowest position near one end of the oil inlet of the oil reservoir and leads to the inside of the oil reservoir. The lubricating oil stirred up when the transmission transmission parts or shifting elements rotate can flow to the inside of the oil reservoir through the oil receiving plate, which is conducive to receiving more splashing lubricating oil; at least one first oil guide rib is processed on the right side and the right bottom of the first oil baffle, and the first oil guide rib is inclined from top to bottom toward the first bearing to increase the lubricating oil supply to the first bearing;At least one second oil guide rib is provided on the housing on the right side of the transmission body. The second oil guide rib is located below the first oil chamber of the right housing. The fourteenth oil hole is located in the second oil guide rib and connected to the first oil chamber of the right housing. The second oil guide rib extends from the upper right to the lower left to the inner circle of the oil groove, but does not interfere with the bracket of the planetary carrier and the second oil baffle. The lower section of the second oil guide rib is provided with a fifteenth oil hole extending to the fifth bearing. The fifteenth oil hole is interconnected with the fourteenth oil hole so that the lubricating oil can flow to the fifth bearing. The clutch and the brake are located at the outer periphery of the planetary gear inside the housing, and the clutch and brake friction element oil grooves are interconnected with the planetary gear through the fifth oil hole. The clutch is composed of a clutch drum, a clutch hub, a first friction plate and a first steel plate. The brake is composed of a second friction plate and a second steel plate. The second friction plate is slidably connected to one of the components of the planetary gear through an inner spline, and the second steel plate is slidably connected to the housing through an outer spline. The clutch drum, the clutch hub, the first friction plate and the first steel plate are respectively slidably connected or fixedly connected to the relevant components of the planetary gear according to the design intention of the transmission. ; 3. A method for operating a planetary gear transmission lubrication system according to claim 1, characterized in that: Follow these steps: S1: When the clutch is combined with the brake and the brake is released, except for the second steel plate, all the shift actuators and transmission elements are in a rotating state. There are many elements stirring the oil, the stirring radius is large, and the splashing lubricating oil is large. A large amount of lubricating oil enters the oil reservoir and enters the first oil chamber through the filter, which greatly reduces the oil level in the transmission chamber and reduces the energy loss of stirring the oil. S11: The lubricating oil in the oil reservoir enters the first oil passage from the oil reservoir outlet in sequence through the filter, the first oil chamber, the second oil chamber, and the first oil hole, and is thrown from the second oil hole and the third oil hole to the corresponding lubricated components and the oil tank respectively under the action of gravity and centrifugal force. The lubricating oil thrown from the second oil hole is partially thrown from the fifth oil hole to the friction pair of the clutch and the brake under the action of the centrifugal force of the lubricated components. The lubricating oil entering the oil tank from the third oil hole enters the second oil channel under the action of centrifugal force, and is thrown to the fourth bearing on the left side, the third bearing in the middle, and the fourth bearing on the right side from the eighth oil hole, the ninth oil hole, and the tenth oil hole, respectively. Part of the lubricating oil thrown to the fourth bearing is thrown to the clutch and brake friction pair from the fifth oil hole; at this time, although most of the related components do not rotate relative to each other, once the gear is shifted and relatively rotated, sufficient lubrication can be guaranteed in real time; S12: At this time, part or all of the planetary gear passes through the lubricating oil in the lower part of the housing during the rotation process, ensuring that each gear is kept lubricated at all times; the planetary carrier stirs the oil, and part of the lubricating oil enters the friction pair of the clutch and the brake from the fifth oil hole, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, and then flows along the first oil guide rib, the second oil guide rib, and the fifteenth oil hole to the first bearing and the fifth bearing respectively; S13: When the oil level in the oil reservoir reaches the sixth oil hole, the oil will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area; S2: When the brake clutch is disengaged, the brake, planetary gear brake elements and their connecting parts, and clutch related components stop rotating, while the input shaft, other clutch components, planetary gear non-brake elements and their connecting parts, and output shaft rotate. There are not many components that stir the oil, and the diameter of the components is not large. Not much oil can enter the oil reservoir from the oil reservoir port. The oil level in the transmission cavity is at a high position, and the rotating parts with small diameters can stir the oil. The first oil cavity with a low oil inlet position can collect lubricating oil. S21: The flow path of the lubricating oil entering the oil reservoir and the first oil chamber is the same as that described in S11 above; S22: At this time, the planetary gear has both self-rotation and orbital states. Part or all of the planetary gear is stained with lubricating oil when passing through the lubricating oil in the lower part of the housing during the rotation process. Under the action of centrifugal force and the meshing process, the planetary gear adheres, so that the internal gear of the ring gear and the sun gear are also stained with lubricating oil, ensuring that all gears remain lubricated; the lubricating oil stirred by the planetary carrier will partially enter the friction pair of the clutch and the brake from the fifth oil hole under the action of centrifugal force, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle and the right housing, and then flows to the first bearing and the fifth bearing along the first oil guide rib, the second oil guide rib, and the fifteenth oil hole respectively; S23: When the oil level in the oil reservoir reaches the sixth oil hole, it will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area.

4. A method for operating a planetary gear transmission lubrication system as claimed in claim 2, characterized in that: Follow these steps: S1: When the clutch is combined with the brake and the brake is released, except for the second steel plate, all the shift actuators and transmission elements are in a rotating state. There are many elements stirring the oil, the stirring radius is large, and the splashing lubricating oil is large. A large amount of lubricating oil enters the oil reservoir and enters the first oil chamber through the filter, which greatly reduces the oil level in the transmission chamber and reduces the energy loss of stirring the oil. S11: The lubricating oil in the oil reservoir enters the lubricated elements around the sun gear from the oil reservoir outlet in sequence through the filter, the first oil chamber, the eleventh oil hole, the twelfth oil hole, and enters the second bearing between the oil tank and the input and output shafts through the first oil chamber, the fourteenth oil hole, and the thirteenth oil hole of the right housing, and is thrown toward the corresponding lubricated elements and the oil tank respectively under the action of gravity and centrifugal force. The lubricating oil thrown out from the twelfth oil hole is partially thrown toward the friction pair of the clutch and the brake from the fifth oil hole under the action of the centrifugal force of the lubricated elements. The lubricating oil entering the oil tank enters the second oil channel under the action of centrifugal force, and is thrown from the eighth oil hole, the ninth oil hole and the tenth oil hole to the fourth bearing on the left side, the third bearing in the middle, and the fourth bearing on the right side, and part of it is thrown from the fifth oil hole to the friction pair of the clutch and the brake; at this time, although most of the related components do not rotate relative to each other, once they rotate relative to each other due to gear shifting, they can be fully lubricated in real time; S12: At this time, part or all of the planetary gear passes through the lubricating oil in the lower part of the housing during the rotation process, ensuring that each gear is kept lubricated at all times; the lubricating oil stirred by the planetary carrier will partially enter the friction pair of the clutch and the brake from the fifth oil hole under the action of centrifugal force, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, the first oil chamber of the right housing, and then flows along the first oil guide rib and the second oil guide rib, the fourteenth oil hole, and the fifteenth oil hole to the first bearing and the fifth bearing respectively; S13: When the oil level in the oil reservoir reaches the sixth oil hole, the oil will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area; S2: When the brake clutch is disengaged, the brake, planetary gear brake elements and their connecting parts, and clutch related components stop rotating, while the input shaft, other clutch components, planetary gear non-brake elements and their connecting parts, and output shaft rotate. There are not many components that stir the oil, and the diameter of the components is not large. Not much oil can enter the oil reservoir from the oil reservoir port. The oil level in the transmission cavity is at a high position, and the rotating parts with small diameters can stir the oil. The first oil cavity with a low oil inlet position can collect lubricating oil. S21: The flow path of the lubricating oil entering the oil reservoir and the first oil chamber is the same as that described in S11 above; S22: At this time, the planetary gear has both self-rotation and orbital states. Part or all of the planetary gear is stained with lubricating oil when passing through the lubricating oil in the lower part of the housing during the rotation process. Under the action of centrifugal force and the meshing process, the planetary gear adheres, so that the internal gear of the ring gear and the sun gear are also stained with lubricating oil, ensuring that all gears remain lubricated; the planetary carrier stirs the oil, and part of the lubricating oil enters the friction pair of the clutch and the brake from the fifth oil hole, ensuring real-time lubrication and heat dissipation of the friction pair; the splashed lubricating oil is partially thrown to the first oil baffle plate and the right housing, the first oil chamber of the right housing, and then flows along the first oil guide rib and the second oil guide rib, the fourteenth oil hole, and the fifteenth oil hole to the first bearing and the fifth bearing respectively; S23: When the oil level in the oil reservoir reaches the sixth oil hole, it will overflow from the sixth oil hole and flow from the seventh oil hole to the oil chamber at the bottom of the transmission along the corresponding oil pipe or oil channel under the action of gravity, thereby ensuring the circulation of the lubricating oil and expanding the heat dissipation area.

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