Hybrid planet row lubricating structure

Abstract

According to the hybrid planet row lubricating structure, the planet carrier extends out of the speed reducer shell to be connected with the engine, the gear pump located in the upper oil suction channel is assembled on the planet carrier, the gear pump coaxially rotates along with the planet carrier, and oil in the speed reducer shell is sucked into the upper oil suction channel and pumped into the planet carrier oil channel; oil is guided into the thrust ball bearing through the planet carrier oil duct, guided into the needle bearing through the planet shaft oil duct and guided to the planet wheel gear through the oil passing hole in the gasket, active lubrication of the bearing and the gear in the planet row is formed, the lubrication effect is guaranteed, and the lubrication reliability is improved. The gear pump is arranged on the planet carrier and is driven by the engine, and the characteristics that the engine in the hybrid power system is in an optimal injection efficiency area and the rotating speed is high are utilized, so that the rotating speed of the gear pump is increased, the lubricating reliability is ensured, the energy consumption is reduced, and the hybrid power cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hybrid planetary gear train lubricating structure, belong to planetary gear train lubricating technical field. BACKGROUND

[0002] The existing hybrid transmission adopts the transmission form of gear set, and the hybrid planetary gear train is the main power driving source of new energy vehicle power synthesis box, and the lubrication effect of hybrid planetary gear train directly affects the service life and use performance of hybrid planetary gear train.The traditional lubricating structure is overall oil stirring splash lubrication of transmission system, but the oil stirring loss of oil stirring splash lubrication is too large, and the splashed lubricating oil is less, so that the rotating parts such as support bearing and needle bearing in planetary gear train have the problem of insufficient lubrication, therefore, the lubrication of current hybrid planetary gear train reducer is mainly forced lubrication (also called active lubrication), that is, the oil is pumped into the center hole of input shaft by using electronic pump, and then the oil is thrown radially to the bearing through the hole on the input shaft for lubrication.The disadvantage of this scheme is that the electronic pump needs to run all the time, the energy consumption is large, and the hybrid cost is increased. SUMMARY

[0003] The hybrid planetary gear train lubricating structure provided by the utility model guarantees lubrication effect, improves lubrication reliability, installs gear pump on planet carrier driven by engine, utilizes the characteristics that engine in hybrid system is in the best injection efficiency area and high speed, that is, improves the speed of gear pump, guarantees the reliability of lubrication, reduces energy consumption and reduces hybrid cost.

[0004] To achieve the above purpose, the utility model adopts the technical scheme that:

[0005] The hybrid planetary gear train lubricating structure comprises a planet carrier connected with an engine at one end and extending from a reducer housing, a planet wheel assembled on the planet carrier, a sun gear engaged with the planet wheel, and a gear ring engaged with the planet wheel, the inner end of the planet carrier is supported on the inner end of the sun gear through a thrust ball bearing, the planet wheel is assembled on a planet shaft of the planet carrier through a needle bearing, and a gasket is arranged between the end faces of the planet carrier and the planet wheel, characterized in that: an upper oil suction channel is formed in the reducer housing, an planet carrier oil channel is formed in the planet carrier and connected with the upper oil suction channel to guide oil into the thrust ball bearing, a planet shaft oil channel is formed in the planet shaft and connected with the planet carrier oil channel to guide oil into the needle bearing, an oil passing hole is formed in the gasket to guide oil flowing to the needle bearing to the gear of the planet wheel, a gear pump is assembled in the upper oil suction channel on the planet carrier, the gear pump rotates synchronously with the planet carrier to suck oil in the reducer housing into the upper oil suction channel and pump the oil in the upper oil suction channel to the planet carrier oil channel.

[0006] Preferably, the lower end of the upper oil suction channel is provided with a filter to filter oil, and the upper end of the upper oil suction channel is an annular oil channel arranged on the outer periphery of the planet carrier, and the gear pump is assembled in the annular oil channel.

[0007] Preferably, the planet carrier oil channel comprises a first oil channel in cross shape connecting the upper oil suction channel upper end and the planet carrier inner hole, a second oil channel opened on the outer periphery of the planet carrier inner hole and connected with the first oil channel, a bowl-shaped sealing piece one assembled on the end face of the planet carrier inner hole, a bowl-shaped sealing piece two assembled on the end face of the sun gear inner hole, the bowl-shaped sealing piece one and the bowl-shaped sealing piece two oppositely arranged, the second oil channel connected with the planet shaft oil channel and guiding the oil into the thrust ball bearing.

[0008] Preferably, the thrust ball bearing and the planet carrier form an axial third oil channel, the third oil channel guiding the oil flowing through the thrust ball bearing to the planet wheel gear.

[0009] Preferably, the planet shaft oil channel comprises a fourth oil channel connected with the third oil channel and opened along the planet shaft axial direction, a fifth oil channel connected with the fourth oil channel and guiding the oil into the needle bearing, the fifth oil channel opened along the planet shaft radial direction.

[0010] The beneficial effects of the utility model are:

[0011] The utility model discloses a hybrid planetary row lubricating structure, and the planet carrier is connected with the engine and extends from the reducer shell, the gear pump in the upper oil suction channel is assembled on the planet carrier, the gear pump rotates coaxially with the planet carrier, the oil in the reducer shell is sucked into the upper oil suction channel and is pumped into the planet carrier oil channel, the oil is guided into the thrust ball bearing through the planet carrier oil channel, the oil is guided into the needle bearing through the planet shaft oil channel, the oil is guided into the planet wheel gear through the oil hole on the gasket, the active lubrication of the bearing and the gear in the planetary row is formed, the lubricating effect is guaranteed, the lubricating reliability is improved, the gear pump is assembled on the planet carrier and is driven by the engine, the engine in the hybrid system is in the best fuel efficiency area and high speed, the rotation speed of the gear pump is improved, the lubricating reliability is guaranteed, the energy consumption is reduced, and the hybrid cost is reduced. DRAWINGS

[0012] Figure 1 It is a schematic view of the hybrid planetary row lubricating structure in the specific embodiment.

[0013] Figure 2 It is a partial enlarged schematic view. Figure 1 SPECIFIC EMBODIMENT

[0014] The embodiment of the utility model will be explained in detail below. Figures 1-2

[0015] ​​The mixed drive planetary gear set lubricating structure comprises a planetary carrier 1 extended from a reducer housing 8 and connected with an engine, planetary gears 2 assembled on the planetary carrier 1, a sun gear 3 engaged with the planetary gears 2, and a ring gear engaged with the planetary gears 2, the inner end of the planetary carrier 1 is supported on the inner end of the sun gear 3 through a thrust ball bearing 4, the planetary gears 2 are assembled on planetary shafts 6 on the planetary carrier 1 through needle bearings 5, and a gasket 7 is arranged between the end surface of the planetary carrier 1 and the planetary gears 2, characterized in that an upper oil suction channel 9 is arranged on the reducer housing 8, an oil channel 10 is arranged on the planetary carrier 1 and communicates with the upper oil suction channel 9 and can guide oil into the thrust ball bearing 4, an oil channel 11 is arranged on the planetary shaft 6 and communicates with the oil channel 10 and can guide oil into the needle bearing 5, an oil hole 12 is arranged on the gasket 7 and can guide oil flowing to the needle bearing 5 to the gear of the planetary gear 2, a gear pump 13 is assembled on the planetary carrier 1 and located in the upper oil suction channel 9, and the gear pump 13 rotates synchronously with the planetary carrier 1 to suck oil in the reducer housing 8 into the upper oil suction channel 9 and pump the oil in the upper oil suction channel 9 into the oil channel 10.

[0016] The mixed drive planetary gear set lubricating structure comprises a planetary carrier 1 extended from a reducer housing 8 and connected with an engine, planetary gears 2 assembled on the planetary carrier 1, a sun gear 3 engaged with the planetary gears 2, and a ring gear engaged with the planetary gears 2, the inner end of the planetary carrier 1 is supported on the inner end of the sun gear 3 through a thrust ball bearing 4, the planetary gears 2 are assembled on planetary shafts 6 on the planetary carrier 1 through needle bearings 5, and a gasket 7 is arranged between the end surface of the planetary carrier 1 and the planetary gears 2, characterized in that an upper oil suction channel 9 is arranged on the reducer housing 8, an oil channel 10 is arranged on the planetary carrier 1 and communicates with the upper oil suction channel 9 and can guide oil into the thrust ball bearing 4, an oil channel 11 is arranged on the planetary shaft 6 and communicates with the oil channel 10 and can guide oil into the needle bearing 5, an oil hole 12 is arranged on the gasket 7 and can guide oil flowing to the needle bearing 5 to the gear of the planetary gear 2, a gear pump 13 is assembled on the planetary carrier 1 and located in the upper oil suction channel 9, and the gear pump 13 rotates synchronously with the planetary carrier 1 to suck oil in the reducer housing 8 into the upper oil suction channel 9 and pump the oil in the upper oil suction channel 9 into the oil channel 10.

[0017] The lower end of the upper oil suction channel 9 is provided with a filter 14 for filtering oil, and the upper end of the upper oil suction channel 9 is provided with an annular oil channel 91 arranged on the outer periphery of the planetary carrier, and the gear pump 13 is assembled in the annular oil channel 91. When the gear pump 9 operates, the oil in the reducer housing is sucked upward into the upper oil suction channel 9, the filter 14 filters the sucked oil, and the filtered oil moves upward into the annular oil channel 91 and is pumped into the oil channel 10 by the gear pump 9.

[0018] The planetary carrier oil channel 10 comprises oil channel one 101 connecting the upper end of the oil channel 9 and the inner hole 15 of the planetary carrier and being cross-shaped, and oil channel two 102 being provided on the outer periphery of the inner hole of the planetary carrier and being connected with the oil channel one 101. The inner hole 15 of the planetary carrier is sealed by bowl-shaped sealing piece one 16, and the inner hole of the sun gear 2 is sealed by bowl-shaped sealing piece two 17. The bowl-shaped sealing piece one 16 and the bowl-shaped sealing piece two 17 are oppositely arranged. The oil channel two 102 is connected with the planetary shaft oil channel 11 and guides the oil into the thrust ball bearing 4. The bowl-shaped sealing piece one 16 seals the inner hole 15 of the planetary carrier to prevent the oil from flowing out of the inner hole 15 of the planetary carrier. The oil channel two guides the oil into the thrust ball bearing 4 for lubrication. The bowl-shaped sealing piece two 16 seals the inner hole of the sun gear to prevent the oil flowing out of the oil channel two 102 from flowing into the inner hole of the sun gear. Due to the sealing of the bowl-shaped sealing piece one 15 and the bowl-shaped sealing piece two 16, part of the oil in the oil channel two 102 flows into the thrust ball bearing 4, and the other part flows into the planetary shaft oil channel 11 and is guided into the needle bearing 5 by the planetary shaft oil channel 11.

[0019] The thrust ball bearing 4 and the planetary carrier 1 form an oil channel three 103 along the axial direction. The oil channel three 103 guides the oil flowing through the thrust ball bearing 4 to the gear of the planetary gear 2. The oil flows through the thrust ball bearing 4 into the oil channel three 103 and flows to the gear of the planetary gear 2 to lubricate the planetary gear 2, reduce the wear of the planetary gear 2, the sun gear cooperating with the planetary gear and the ring gear, and the oil flowing to the gear of the planetary gear 2 falls back into the reducer housing 8 under the action of gravity as the planetary gear 2 rotates.

[0020] The planetary shaft oil channel 11 comprises oil channel four 104 connected with the oil channel three 103 and being provided along the axial direction of the planetary shaft 3, and oil channel five 105 connected with the oil channel four 104 and guiding the oil into the needle bearing 5. The oil channel five 105 is provided along the radial direction of the planetary shaft 6. The oil flowing into the planetary shaft oil channel 11 from the oil channel two 102 enters the oil channel four 104 and then flows into the needle bearing 5 through the oil channel five 105 to lubricate the needle bearing 5. The oil flowing through the needle bearing 5 is guided into the gear of the planetary gear through the oil hole 12 of the washer 7 to form lubrication of the planetary gear, and falls back into the reducer housing 8 under the action of gravity as the planetary gear 2 rotates.

[0021] The lubrication path of the hybrid planetary row lubrication structure is as follows:

[0022] The planet carrier 1 drives the gear pump 13 with the engine, and the oil in the bottom of the reducer housing 8 enters the upper oil channel 9 and is pumped into the oil channel one 101, and the oil flows into the oil channel two 102 through the oil channel one 101, part of the oil in the oil channel two 102 flows into the thrust ball bearing 4, and then flows into the gear of the planet wheel through the oil channel three 103, and falls back into the reducer housing 8 with the rotation of the gear, another part of the oil in the oil channel two 102 flows into the oil channel four 104 and flows into the needle bearing 5 through the oil channel five 105, and then flows into the gear of the planet wheel through the oil hole 12 on the gasket 7, and falls back into the reducer housing 8 with the rotation of the gear, forming a circulating lubrication for the planet row.

[0023] The technical scheme of the embodiments of the utility model is completely described above in combination with the drawings, and it should be noted that the described embodiments are only a part of the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A hybrid planetary gear lubrication structure, comprising a carrier connected to an engine at one end thereof, a planet gear mounted on the carrier, a sun gear engaged with the planet gear, and a ring gear engaged with the planet gear, the carrier being supported on an inner end of the sun gear by a thrust ball bearing, the planet gear being mounted on a planet shaft of the carrier by a needle bearing, and a gasket being interposed between end faces of the carrier and the planet gear, characterized in that: The upper oil suction channel is arranged on the reducer housing, the planet carrier oil channel is arranged on the planet carrier and communicated with the upper oil suction channel and capable of guiding the oil into the thrust ball bearing, the planet shaft oil channel is arranged on the planet shaft and communicated with the planet carrier oil channel and capable of guiding the oil into the needle bearing, the oil hole is arranged on the washer and capable of guiding the oil flowing to the needle bearing into the planet wheel gear, the gear pump is assembled on the planet carrier and located in the upper oil suction channel, the gear pump rotates synchronously with the planet carrier, the oil in the reducer housing is sucked into the upper oil suction channel, and the oil in the upper oil suction channel is pumped into the planet carrier oil channel. ​ 2. The hybrid planetary gear train lubrication arrangement of claim 1, wherein: The lower end of the upper oil suction channel is provided with the filter collector for filtering the oil, and the upper end of the upper oil suction channel is provided with the annular oil channel arranged on the outer periphery of the planet carrier, and the gear pump is assembled in the annular oil channel.

3. The hybrid planetary gear train lubrication arrangement of claim 1, wherein: The planet carrier oil channel comprises the oil channel one communicated with the upper end of the upper oil suction channel and the inner hole of the planet carrier and in a cross type, and the oil channel two arranged on the outer periphery of the inner hole of the planet carrier and communicated with the oil channel one, the bowl-shaped plug one is sealingly assembled on the end face of the inner hole of the planet carrier, the bowl-shaped plug two is sealingly assembled on the end face of the inner hole of the sun gear, the bowl-shaped plug one and the bowl-shaped plug two are oppositely arranged, the oil channel two is communicated with the planet shaft oil channel and capable of guiding the oil into the thrust ball bearing.

4. The hybrid planetary gear train lubrication arrangement of claim 3, wherein: The oil channel three is formed between the thrust ball bearing and the planet carrier and along the axial direction, and the oil channel three guides the oil flowing through the thrust ball bearing to the planet wheel gear.

5. The hybrid planetary gear train lubrication arrangement of claim 3, wherein: The planet shaft oil channel comprises the oil channel four communicated with the oil channel three and arranged along the axial direction of the planet shaft, and the oil channel five communicated with the oil channel four and capable of guiding the oil into the needle bearing, and the oil channel five is arranged along the radial direction of the planet shaft.

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