Lubricating device for planetary mechanism of transmission

Abstract

A transmission planetary mechanism lubricating device comprises a planet carrier, a plurality of planet shafts are arranged in the planet carrier, the front end and the rear end of each planet shaft are fixedly connected with the front end and the rear end of the planet carrier, planet shaft oil holes are formed in the planet shafts, and lubricating oil holes are formed in the bottom ends of the planet shaft oil holes. The lubricating oil hole penetrates through the outer side hole wall of the planet shaft oil hole and is communicated with the planet shaft oil hole, an oil collecting disc is arranged on the outer side end face of the rear end of the planet carrier, the oil collecting disc is tightly attached to the outer side end face of the planet carrier, the oil collecting disc is fixedly connected with the planet shaft, and an oil inlet groove and a plurality of oil outlet grooves are formed in the inner end face of the oil collecting disc. The oil inlet groove is communicated with the oil outlet grooves to form oil passing channels, the oil outlet grooves are communicated with the planet shaft oil holes, flow dividing grooves are formed in the middles of the oil passing channels, flow dividers are arranged in the flow dividing grooves, flow dividing holes are formed in the middles of the flow dividers, and the flow dividing holes are communicated with the oil passing channels. A sealing ring is arranged on the end face of the joint of the oil collecting tray and the planet carrier.

Description

Technical Field

[0001] The present invention relates to the field of automotive transmissions, and more particularly to a lubrication device for a planetary mechanism of a transmission. Background Art

[0002] In an automotive transmission planetary mechanism, the planet gears rotate at high speed around the planet carrier. The needle bearings used to support the high-speed rotation of the planet gears are sleeved on the outer surface of the planet shafts. Due to the high relative linear velocity, sufficient lubrication is required to prevent problems such as bearing roller ablation and cage spalling. Usually, lubricating oil is pumped into the planetary mechanism through an electronic oil pump inside the transmission assembly. The planet shafts are usually arranged and distributed in multiple numbers inside the planet carrier. The traditional planetary mechanism device lacks an effective device and a sealing structure for the pumping channel to reasonably distribute the pumped lubricating oil flow to each planet shaft. The lubricating oil flowing inside the channel is easily concentrated in the area of a certain planet shaft and leaks and loses in the radial direction under the centrifugal force generated by the high-speed rotation of the planetary mechanism, resulting in a relatively excessive lubricating oil flow obtained in one planet shaft of the planetary mechanism and a relatively insufficient lubricating oil flow obtained in another planet shaft, causing poor lubrication of the needle bearings on the surface of this other planet shaft, problems such as bearing roller ablation and cage spalling, and further leading to gear pitting and tooth breakage failure of the planet gears carried by it, until the planetary mechanism of the transmission is completely damaged. Summary of the Invention

[0003] The purpose of the present invention is to provide a lubrication device for a planetary mechanism of a transmission in response to the deficiencies of the prior art. This lubrication device for a planetary mechanism of a transmission aims to solve the problems that the traditional planet carrier structure lacks an effective flow distribution structure and a lubricating oil leakage and loss structure, resulting in the failure of bearing and gear pair parts.

[0004] The purpose of the present invention is achieved by the following solution: A lubrication device for a planetary mechanism of a transmission, including a planet carrier. Multiple planet shafts are arranged inside the planet carrier. The front and rear ends of the planet shafts are fixedly connected to the front and rear ends of the planet carrier. A planet shaft oil hole is arranged inside the planet shaft. A lubricating oil hole is arranged at the bottom end of the planet shaft oil hole. The lubricating oil hole penetrates through the outer hole wall of the planet shaft oil hole and is communicated with the planet shaft oil hole. An oil collecting tray is arranged on the outer end face at the rear end of the planet carrier. The oil collecting tray is closely attached to the outer end face of the planet carrier and is fixedly connected to the planet shaft. An oil inlet groove and multiple oil outlet grooves are arranged on the inner end face of the oil collecting tray. The oil inlet groove and each oil outlet groove are respectively communicated to form an oil passage. The oil outlet groove is communicated with the planet shaft oil hole. A flow dividing groove is arranged in the middle of each oil passage. A flow divider is arranged in the flow dividing groove. A flow dividing hole is arranged in the middle of the flow divider. The flow dividing hole is communicated with the oil passage. A sealing ring is arranged on the end face at the connection between the oil collecting tray and the planet carrier for sealing.

[0005] The planetary shafts are evenly arranged at 360° inside the planet carrier, and at least three planetary shafts are axially arranged in the planet carrier.

[0006] A claw is arranged at the front end of the oil outlet groove of the oil collecting tray. The claw is perpendicular to the end face of the oil collecting tray. A clamping groove is radially arranged in the middle of the planetary shaft oil hole. The claw is clamped in the clamping groove, and the oil collecting tray is fixedly connected to the planetary shaft.

[0007] Both ends of the flow dividing groove are arranged on the oil collecting tray, and the flow dividing groove is perpendicular to the oil outlet groove.

[0008] The flow divider is rectangular, the flow divider is perpendicular to the oil outlet groove, and the flow dividing holes are axially arranged in the middle of the flow divider.

[0009] The number of the oil outlet grooves on the oil collecting tray and the number of the flow dividers are the same as the number of the planetary shafts.

[0010] The lubricating oil hole radially penetrates the outer hole wall of the planetary shaft oil hole, and the lubricating oil hole is perpendicular to the planetary shaft oil hole.

[0011] The planetary shaft oil hole is axially arranged inside the planetary shaft, and the hole depth of the planetary shaft oil hole is 1 / 2 of the shaft length of the planetary shaft.

[0012] The sealing ring is an O-ring, a D-ring or a Y-ring. The sealing ring is arranged around the connection between the oil collecting tray and the planet carrier at 360°.

[0013] An automotive transmission includes the lubrication device for the transmission planetary mechanism described in any one of the above.

[0014] The advantages of the present invention are as follows: The lubricating oil in the oil collecting tray of the planetary mechanism is precisely regulated in terms of flow rate distribution through the flow dividing holes of multiple flow dividers installed in the oil collecting groove, and is guided to the lubricating oil holes of the planetary shafts that need to be lubricated through the oil outlet grooves. The lubricating oil holes lead the lubricating oil out of the planetary shafts for lubricating the needle bearings of the planet gears. The entire oil groove channel flowing through the oil collecting tray is radially sealed by the sealing ring. The purpose of this planetary mechanism lubrication device is to reduce the leakage of the lubricating oil in the oil collecting tray, improve the utilization rate of the lubricating oil flowing to the planetary shaft oil holes, and when the bearings and gear pairs that need to be lubricated on the planetary shafts installed in the planetary mechanism generate the same amount of heat, the lubricating flow rate required to be pumped out by the transmission electronic oil pump for driving the lubricating oil flow by the device is lower, which can reduce the operating power consumption of the electronic oil pump and improve the efficiency of the transmission assembly. The energy consumption of the automotive transmission assembly is lower, and the fuel and power consumption economy of the whole vehicle is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a sectional view of the present invention; Figure 3 is a schematic structural diagram of the oil collecting tray; Figure 4 Schematic diagram of planetary shaft structure; Figure 5 Schematic diagram of shunt structure; Figure 6 Schematic diagram of seal ring structure. Detailed implementation manners

[0016] As Figures 1 to 6 shown, a lubrication device for a transmission planetary mechanism includes a planet carrier 1. A plurality of planetary shafts 2 are axially arranged inside the planet carrier 1. The planetary shafts 2 are evenly arranged at 360° inside the planet carrier 1, and at least three planetary shafts 2 are provided in the planet carrier 1. The front and rear ends of the planetary shaft 2 are fixedly connected to the front and rear ends of the planet carrier 1. A planetary shaft oil hole 14 is arranged inside the planetary shaft 2. The planetary shaft oil hole 14 is axially arranged inside the planetary shaft 2, and the hole depth of the planetary shaft oil hole 14 is 1 / 2 of the shaft length of the planetary shaft 2. A lubricating oil hole 15 is arranged at the bottom end of the planetary shaft oil hole 14. The lubricating oil hole 15 radially penetrates the outer hole wall of the planetary shaft oil hole 14. The lubricating oil hole 15 is perpendicular to and communicates with the planetary shaft oil hole 14. An oil collecting tray 3 is arranged on the outer end face at the rear end of the planet carrier 1. The oil collecting tray 3 is closely attached to the outer end face of the planet carrier 1. A claw 20 is arranged at the front end of the oil outlet groove 13 of the oil collecting tray 3. The claw 20 is perpendicular to the end face of the oil collecting tray 3. A clamping groove 21 is radially arranged in the middle of the planetary shaft oil hole 14. The claw 20 is clamped in the clamping groove 21. The oil collecting tray 3 is fixedly connected to the planetary shaft 2. An oil inlet groove 11 and a plurality of oil outlet grooves 13 are arranged on the inner end face of the oil collecting tray 3. The oil inlet groove 11 and each oil outlet groove 13 are respectively communicated to form an oil passage. The oil outlet groove 13 is communicated with the planetary shaft oil hole 14. A shunt groove 30 is arranged in the middle of each oil passage. Both ends of the shunt groove 30 are arranged on the oil collecting tray 3. The shunt groove 30 is perpendicular to the oil outlet groove 13. A shunt device 5 is arranged in the shunt groove 30. A shunt hole 12 is arranged in the middle of the shunt device 5. The shunt device 5 is rectangular. The shunt device 5 is perpendicular to the oil outlet groove 13. The shunt hole 12 is axially arranged in the middle of the shunt device 5. The flow rate of the lubricating oil passing through the shunt device 5 is controlled by adjusting the diameter of the shunt hole 12. The shunt hole 12 is communicated with the oil passage. A seal ring 4 is arranged on the end face at the connection between the oil collecting tray 3 and the planet carrier 1 for sealing. The seal ring is arranged around the connection between the oil collecting tray 3 and the planet carrier 1 at 360° to prevent lubricating oil leakage. The number of the oil outlet grooves 13 on the oil collecting tray 3 and the number of the shunt devices 5 are the same as the number of the planetary shafts 2. The seal ring 4 is an O-ring, D-ring or Y-ring, etc., which are common seal structure types of seal rings.

[0017] An automotive transmission includes the lubrication device for the transmission planetary mechanism described above.

[0018] AsFigure 2 As shown, the arrow direction is the lubricating oil flow direction. In this device, the lubricating oil flows into the middle of the oil collecting tray 3, enters the diversion holes 12 in the three symmetrically arranged diverters 5 through the internal oil inlet groove 11 of the oil collecting tray 3, flows through the oil outlet groove 13 after the flow rate is distributed by the diversion holes 12, enters the planetary shaft oil holes 14 in the middle of each planetary shaft 2, and flows out through the lubricating oil holes 15 at the top of the planetary shaft 2 for lubricating the planetary gear needle bearings.

[0019] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention fall within the protection scope of the present invention.

Claims

1. A transmission planetary mechanism lubrication device, comprising a planet carrier (1), characterized in that: A plurality of planetary shafts (2) are arranged inside the planetary carrier (1), the front and rear ends of the planetary shafts (2) are connected and fixed to the front and rear ends of the planetary carrier (1), a planetary shaft oil hole (14) is arranged inside the planetary shaft (2), a lubricating oil hole (15) is arranged at the bottom end of the planetary shaft oil hole (14), the lubricating oil hole (15) penetrates the outer hole wall of the planetary shaft oil hole (14) and is connected to the planetary shaft oil hole (14), an oil collecting pan (3) is arranged on the outer end surface of the rear end of the planetary carrier (1), the oil collecting pan (3) is tightly fitted with the outer end surface of the planetary carrier (1), and the oil collecting pan (3) is connected to the planetary shaft (2). The oil collecting pan (3) is connected and fixed, an oil inlet groove (11) and a plurality of oil outlet grooves (13) are arranged on the inner end surface of the oil collecting pan (3), the oil inlet groove (11) and each oil outlet groove (13) are respectively connected to form an oil passage, the oil outlet groove (13) and the planetary shaft oil hole (14) are connected to each other, a diverter groove (30) is arranged in the middle of each oil passage, a diverter (5) is arranged in the diverter groove (30), a diverter hole (12) is arranged in the middle of the diverter (5), and the diverter hole (12) and the oil passage are connected to each other, and a sealing ring (4) is arranged on the end surface of the connection between the oil collecting pan (3) and the planetary carrier (1) for sealing.

2. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: The planet shafts (2) are evenly arranged at 360° inside the planet carrier (1), and at least three planet shafts (2) are axially arranged in the planet carrier (1).

3. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: A clamping claw (20) is provided at the front end of the oil outlet groove (13) of the oil collecting pan (3), the clamping claw (20) and the end surface of the oil collecting pan (3) are perpendicular to each other, a clamping groove (21) is radially provided in the middle of the planetary shaft oil hole (14), the clamping claw (20) is clamped in the clamping groove (21), and the oil collecting pan (3) is connected and fixed to the planetary shaft (2).

4. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: Both ends of the diverter groove (30) are arranged on the oil collecting pan (3), and the diverter groove (30) and the oil outlet groove (13) are perpendicular to each other.

5. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: The flow divider (5) is rectangular, the flow divider (5) and the oil outlet groove (13) are perpendicular to each other, and the flow divider hole (12) is axially arranged in the middle of the flow divider (5).

6. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: The number of the oil outlet grooves (13) and the flow dividers (5) on the oil collecting pan (3) is the same as the number of the planetary shafts (2).

7. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: The lubricating oil hole (15) radially penetrates the outer hole wall of the planetary shaft oil hole (14), and the lubricating oil hole (15) and the planetary shaft oil hole (14) are perpendicular to each other.

8. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: The planetary shaft oil hole (14) is axially arranged inside the planetary shaft (2), and the hole depth of the planetary shaft oil hole (14) is 1 / 2 of the axis length of the planetary shaft (2).

9. The transmission planetary mechanism lubrication device according to claim 1, characterized in that: The sealing ring (4) is an O-type sealing ring, a D-type sealing ring or a Y-type sealing ring, and the sealing ring (4) is arranged 360° around the connection between the oil collecting pan (3) and the planetary carrier (1).

10. An automobile transmission, characterized in that: It comprises the transmission planetary mechanism lubrication device as described in any one of claims 1-9.

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