JP7811468B2 - Lubrication structure - Google Patents

Description

The present invention relates to a lubrication structure for a parking mechanism provided in a transmission, etc.

Conventionally, various types of transmissions are provided with a parking mechanism (parking lock mechanism) for maintaining the vehicle in a parked state (see, for example, Patent Document 1). The parking mechanism described in Patent Document 1 above comprises a parking gear attached to the output shaft of the planetary gear mechanism in the transmission, and a parking pole with a pawl that can mesh with the parking gear. The parking pole is also biased by a pole spring in a direction that disengages it from the parking gear. Therefore, the pawl of the parking pole does not mesh with the parking gear until the parking gear reaches a predetermined rotation speed.

However, with the parking mechanism described above, there have been cases where the driver accidentally shifts the gear into parking range (P range) while driving. In such cases, the parking pole continues to be repelled by the parking gear at high speeds, posing a risk of damage to the pole or parking gear. Even if the parking pole or parking gear is not damaged, there is the problem of the pole becoming worn due to heat generated by friction between the parking pole and the parking gear. As a result, the engagement speed and disengagement speed limits between the parking pole and the parking gear change, raising concerns about possible malfunction of the parking mechanism. Therefore, the invention described in the aforementioned Patent Document 1 discloses a drive device for lubricating the planetary gear mechanism and the parking mechanism.

JP 2012-17825 A

The drive unit described in Patent Document 1 above temporarily directs lubricating oil scooped up by planetary gears located below the transmission into a planetary gear mechanism housing case formed above the parking mechanism. Furthermore, the drive unit described above supplies the lubricating oil that has flowed into the planetary gear mechanism housing case to the parking mechanism by allowing it to flow out of a hole formed below the planetary gear mechanism housing case.

However, the drive unit described in Patent Document 1 above requires the formation of a complex path to supply lubricating oil to the parking mechanism, which results in high costs. Furthermore, the complex and long lubricating oil supply path results in the inability to lubricate the parking mechanism stably. Furthermore, the drive unit described above has problems with poor assembly due to the complex lubricating oil supply path, resulting in reduced assembly accuracy and further increased costs.

The present invention aims to provide a simple lubrication structure that can reliably lubricate the parking mechanism.

(1) The lubrication structure of the present invention, provided to solve the above-mentioned problems, is a lubrication structure for a parking mechanism including a parking gear rotatably supported on a rotating shaft that rotates directly or indirectly in response to the output of power, a support shaft arranged adjacent to the parking gear, and a parking pole that is supported so as to be able to swing around the support shaft in a direction toward or away from the parking gear and has pawls that can mesh with the parking gear as the parking gear swings. The lubrication structure includes: a rotor that is arranged adjacent to the parking pole and rotates directly or indirectly in response to the output of power; and a cover that covers at least a portion of the outer periphery of the rotor, at least a portion of the rotor is immersed in oil and can scoop up the oil as it rotates; and the cover has an opening that is partially open toward the meshing portion between the parking gear and the pawls, and the oil scooped up as the rotor rotates is released toward the meshing portion through the opening.

The above-described lubrication structure releases oil (also referred to as lubricating oil and including fluid) scooped up by the rotation of the rotor toward the meshing portion between the parking pole claw and the parking gear in the parking mechanism (hereinafter simply referred to as the meshing portion). In other words, the above-described lubrication structure supplies the scooped oil almost directly to the meshing portion, ensuring a reliable supply of oil to the meshing portion. This ensures that the meshing portion is lubricated and cooled by the oil. This reduces the load on the meshing portion between the parking pole claw and the parking gear, thereby suppressing wear and tear at the meshing portion. This results in improved durability of the parking pole (including the claw) and the parking gear. Furthermore, stable operation of the parking mechanism can be expected due to a stabilized coefficient of friction. Furthermore, because the load on the parking pole is reduced, it is possible to reduce the size and weight of the parking pole, for example. Furthermore, the simplified oil supply path is expected to reduce costs and improve assembly.

(2) The lubrication structure of the present invention described above has a cam for bringing the parking pawl closer to the parking gear around the support shaft, and the cam is arranged adjacent to the meshing portion, and the oil is preferably released directly or indirectly toward the cam through the opening.

The above-described lubrication structure, by being configured in this way, can lubricate and cool the cam that slides against the parking pole with oil. This reduces the load on the sliding surface between the parking pole and cam, and suppresses wear and tear on the meshing area between the pawl and parking gear. As a result, the above-described lubrication structure makes it possible, for example, to narrow the width of the parking pole, which is expected to lead to smaller and lighter parking poles.

(3) In the lubrication structure of the present invention described above, the parking pole may be disposed below the parking gear, and the cam may be disposed below the parking pole.

The above-mentioned lubrication structure is configured so that the oil supplied to the meshing portion between the parking gear and the claw of the parking pole is also supplied to the cam. Therefore, the above-mentioned lubrication structure can also lubricate the sliding surface between the parking pole and cam with oil, improving the durability of the parking pole. This makes it possible to reduce the size and weight of the parking pole. Furthermore, since the coefficient of friction between the sliding surface between the cam and parking pole can be stabilized, stable operation of the parking mechanism can be expected.

(4) In the lubrication structure of the present invention described above, the power is output through a continuously variable transmission mounted on a vehicle, and the continuously variable transmission includes a primary pulley arranged on the input side of the power, a secondary pulley arranged on the output side of the power, and an endless belt stretched over the primary pulley and the secondary pulley, and the rotating shaft is directly or indirectly connected to the secondary pulley, and the rotating body forms the primary pulley.

The above-described lubrication structure, by being configured in this manner, can provide a structure suitable for continuously variable transmissions (CVTs). In other words, the rotational force of the primary pulley (rotating body) in the continuously variable transmission is used to scoop up oil, and this rotational force can also be used to supply oil to the parking mechanism. As a result, the above-described lubrication structure can be configured with a simple mechanism.

(5) In the lubrication structure of the present invention described above, at least a portion of the cover is formed along the circumferential direction of the rotating body, and the opening is formed to open in the tangential direction of the outer periphery of the rotating body and also opens toward the rotational direction of the rotating body.

The above-mentioned lubrication structure is configured so that the oil that has been scooped up is smoothly released from the opening as the rotor rotates. This ensures that the parking mechanism is lubricated and cooled by the oil more reliably.

The present invention provides a lubrication structure that is simple in structure and can reliably lubricate the parking mechanism.

1 is a partially cutaway perspective view of a lubrication structure according to an embodiment of the present invention, as viewed from the rear side of a vehicle. 1 is a partially cutaway front view of a lubrication structure according to an embodiment of the present invention, as viewed from the rear side of a vehicle. 1 is a cross-sectional view of a lubrication structure according to an embodiment of the present invention, viewed from above.

A lubrication structure 1 according to an embodiment of the present invention will now be described with reference to Figures 1 to 3. In this embodiment, the lubrication structure 1 is described as being provided to lubricate a parking mechanism 30 in a continuously variable transmission 2 (CVT) mounted on a vehicle. This embodiment also describes an example in which the rotating body 20 forms the primary pulley 20 in the continuously variable transmission 2 (also referred to as CVT 2).

First, the CVT 2 in which the lubrication structure 1 is formed will be described below with reference to Figure 3. The CVT 2 is designed to transmit the power output from an engine (not shown) mounted on a vehicle to a drive shaft (not shown) at a variable speed. The CVT 2 includes a primary pulley 20, a secondary pulley 25, an endless belt 28, and a housing 29 that houses these components.

The primary pulley 20 is composed of a primary fixed sheave 20A and a primary moving sheave 20B, and constitutes the rotating body 20 in the lubrication structure 1. The primary fixed sheave 20A is arranged at a predetermined distance from the primary moving sheave 20B and is arranged rearward of the primary moving sheave 20B (toward the rear of the vehicle). The primary fixed sheave 20A is supported so that it can rotate integrally with the primary shaft 21. The opposing surfaces of the primary fixed sheave 20A and the primary moving sheave 20B are each formed in a conical shape. A cover 10 (see Figures 1 and 2), which constitutes the lubrication structure 1 described below, is provided on the outer periphery of the primary pulley 20.

The primary moving sheave 20B is slidable in the longitudinal direction along the primary shaft 21 and is supported so as to rotate integrally with the primary shaft 21. A primary piston 22 is provided on the front side (front of the vehicle) of the primary moving sheave 20B. The primary piston 22 can move the primary moving sheave 20B toward and away from the primary fixed sheave 20A. In this embodiment, the primary pulley 20 is configured to rotate in the direction of the arrow shown in Figures 1 and 2 (clockwise when viewed from the rear of the vehicle).

As shown in FIG. 3, the secondary pulley 25 is composed of a secondary fixed sheave 25A and a secondary moving sheave 25B. The secondary fixed sheave 25A is disposed adjacent to the secondary moving sheave 25B and is disposed forward of the secondary moving sheave 25B (toward the front of the vehicle). The secondary fixed sheave 25A is supported so as to be rotatable integrally with the secondary shaft 26 (also referred to as the rotating shaft 26). Therefore, the secondary shaft 26 rotates indirectly in response to the engine output. The opposing surfaces of the secondary fixed sheave 25A and the secondary moving sheave 25B are formed in a conical shape.

The secondary moving sheave 25B is slidable in the longitudinal direction along the secondary shaft 26 and is supported so as to be rotatable integrally with the secondary shaft 26. A secondary piston 27 is provided on the rear side (rear side of the vehicle) of the secondary moving sheave 25B. The secondary piston 27 can move the secondary moving sheave 25B toward and away from the secondary fixed sheave 25A.

The endless belt 28 is, for example, a steel belt, and is looped around the primary pulley 20 and the secondary pulley 25. The clamping position (overlap diameter) of the endless belt 28 on the primary pulley 20 changes as the primary moving sheave 20B approaches or moves away from the primary fixed sheave 20A. The clamping position (overlap diameter) of the endless belt 28 on the secondary pulley 25 also changes as the secondary moving sheave 25B approaches or moves away from the secondary fixed sheave 25A. As a result, the CVT 2 can change the speed of the power input to the primary shaft 21 and output it from the secondary shaft 26.

As shown in Figures 1 and 2, the storage case 29 is cylindrically formed so that it can accommodate the primary pulley 20, secondary pulley 25 (see Figure 3), endless belt 28 (see Figure 3), and parking mechanism 30 (described later), all together. The storage case 29 is filled with oil (also known as lubricating oil, including fluid), not shown. The oil is filled to the extent that a portion of the lower end of the primary pulley 20 is submerged. Therefore, the oil is scooped up as the primary pulley 20 rotates. An oil injection nozzle 15 (see Figure 3) is disposed between the primary pulley 20 and the secondary pulley 25. The injection nozzle 15 injects oil toward the primary pulley 20 and the secondary pulley 25.

Next, the parking mechanism 30 lubricated by the lubrication structure 1 of the present invention will be described in detail below with reference to Figures 1 to 3.

As shown in Figures 1 and 2, the parking mechanism 30 includes a parking gear 31, a support shaft 41 disposed adjacent to the parking gear 31, a parking pole 40 rotatably supported on the support shaft 41, and a claw 42 and a protrusion 43 formed on the parking pole 40.

A parking gear 31 is supported on the front side of the secondary pulley 25 (see Figure 3) on the secondary shaft 26. The parking gear 31 rotates integrally with the secondary shaft 26. The parking gear 31 has a plurality of teeth 32 (six in this embodiment) formed at a predetermined pitch on its outer periphery.

The teeth 32 are formed with a protrusion amount (height) and pitch that allows them to mesh with the claws 42 of the parking pole 40 (described below) at a predetermined meshing amount. The teeth 32 mesh with the claws 42 to form meshing portions 35.

A support shaft 41 is located below and adjacent to the parking gear 31. The support shaft 41 is erected on the outer wall of the CVT 2 so as to be parallel to the secondary shaft 26.

The parking pole 40 is rod-shaped and positioned below the parking gear 31. The base end of the parking pole 40 is rotatably supported on a support shaft 41, and can swing around the support shaft 41 in a direction toward or away from the parking gear 31.

The parking pole 40 has a claw 42 at the tip of the surface facing the parking gear 31 that can mesh with the parking gear 31. The parking pole 40 also has a protrusion 43 positioned away from the claw 42 in the swing radius direction.

The parking pole 40 is biased by a pole spring 44 in a direction away from the parking gear 31, and in ranges other than P range (for example, D range or B range), the pawl 42 and the parking gear 31 are separated and do not mesh.

As shown in FIG. 2, a cam mechanism 45 is provided below the tip of the parking pole 40. That is, the cam mechanism 45 is disposed adjacent to the meshing portion 35. The cam mechanism 45 includes a cam shaft 46 that can move back and forth in the front-to-rear direction, and a cam 47 supported on the tip of the cam shaft 46. The cam 47 comes into contact with the lower end of the parking pole 40 as the cam shaft 46 advances toward the parking pole 40 (toward the viewer in the figure). This allows the cam 47 to move the parking pole 40 closer to the parking gear 31, centered on the support shaft 41.

When the driver operates the shift lever or shift switch on the driver's seat to shift into parking range (also called P range), the cam mechanism 45 causes the camshaft 46 to move toward the parking pole 40. As a result, the parking pole 40 is pushed up by the cam 47 so that it swings toward the parking gear 31 against the biasing force of the spring.

The pawl 42 is formed on the surface of the parking pole 40 facing the parking gear 31 at the tip end. The pawl 42 protrudes toward the parking gear 31 and is sized to be able to mesh with the teeth 32 of the parking gear 31. The pawl 42 protrudes from the surface of the parking pole 40 facing the parking gear 31. The pawl 42 meshes with the teeth 32 to a predetermined degree, thereby locking the parking gear 31 so that it cannot rotate.

The protrusion 43 is provided to form a gap between the pawl 42 and the tooth tip 33 when the pawl 42 and the parking gear 31 are engaged. The protrusion 43 is arranged between the pawl 42 and the support shaft 41 on the surface of the parking pole 40 facing the parking gear 31. The protrusion 43 is also formed to protrude in the same direction as the pawl 42. The protrusion 43 is formed so that it can abut against the tooth tip 33 of the parking gear 31 when the parking pole 40 is brought close to the parking gear 31.

Furthermore, when the protrusion 43 abuts against the tooth tip 33, the protrusion end side is formed in a shape that follows the tooth tip formation surface of the parking gear 31. In other words, a wide contact area is ensured between the protrusion 43 and the tooth tip 33 of the parking gear 31, so that the load does not concentrate at one point. Furthermore, when the protrusion 43 abuts against the tooth tip 33, the protrusion end side is inclined in a direction that follows the tangent direction of the surface where the tooth tip 33 of the parking gear 31 is formed. This ensures an even wider contact area between the protrusion 43 and the tooth tip 33 of the parking gear 31, further preventing the load from concentrating at one point.

The protrusion 43 is formed with a protrusion amount (height) that creates a gap between the pawl 42 and the tooth tip 33 of the parking gear 31 so that they do not come into contact with each other. Therefore, when the parking pole 40 is brought close to the parking gear 31, the protrusion 43 comes into contact with the tooth tip 33 of the parking gear 31. This allows the protrusion 43 to function as a stopper, creating a gap between the pawl 42 and the tooth tip 33 of the parking gear 31. This prevents contact (also known as deep engagement) between the pawl 42 and the tooth tip 33 of the parking gear 31 when the parking pole 40 swings toward the parking gear 31. In this way, in this embodiment, there is no need to increase the rigidity or strength of the parking pole 40 (including the pawl 42) and the parking gear 31 more than necessary, thereby preventing increases in manufacturing costs. Furthermore, preventing contact between the pawl 42 and the tooth tip 33 reduces the generation of abnormal noise.

Next, the lubrication structure 1 for lubricating the parking mechanism 30 will be described in detail below. The lubrication structure 1 includes a cover 10 that covers at least a portion of the outer periphery of the primary pulley 20.

As shown in Figures 1 and 2, the cover 10 has an arc portion 11 formed circumferentially from the upper end to the lower end of the primary pulley 20, and an extension portion 12 extending from the arc portion 11 toward the meshing portion 35.

In this embodiment, the arc portion 11 is the inner wall of the accommodating case 29 from the upper end to the lower end. The arc portion 11 is not limited to an arc shape; it can be modified to various shapes and sizes depending on the shape and size of the primary pulley 20 or the characteristics of the oil used.

The extension 12 is formed by branching the inner wall at the lower end of the accommodating case 29 in the tangential direction of the primary pulley 20 and extending it in a substantially straight line. In other words, the extension 12 is formed integrally with the accommodating case 29. Therefore, the cover 10 does not need to be separately assembled to the accommodating case 29, primary pulley 20, etc. This simplifies the assembly process of the CVT 2 and is expected to result in cost reductions. The extension 12 is also formed toward the meshing portion 35. The extension 12 has an opening 13 that opens toward the meshing portion 35. The shape and size of the extension 12 can be changed depending on the position of the meshing portion 35, the characteristics of the oil, etc.

The opening 13 is formed to open in the tangential direction on the outer periphery of the primary pulley 20 and faces in the direction of rotation of the primary pulley 20 (the direction of the arrow shown).

The cover 10 has a hole 14 (see Figure 1) at its bottom end, which allows oil filled in the storage case 29 to flow into the cover 10 and allows excess oil to be discharged. The cover 10 can store oil flowing in from the storage case 29 and oil sprayed from the spray nozzle 15.

As described above, in this embodiment, the primary pulley 20 is set to rotate in the direction of the arrow shown in the figure (clockwise when viewed from the rear). Therefore, as the primary pulley 20 rotates, oil is scooped up in the direction of the arrow shown in the figure. Therefore, the cover 10 can release the oil scooped up as the primary pulley 20 rotates toward the meshing portion 35 through the opening 13. In other words, the cover 10 can guide the oil scooped up as the primary pulley 20 rotates toward the meshing portion 35.

In addition, the scooped-up oil is supplied almost directly to the meshing portion 35, ensuring reliable oil supply to the meshing portion 35. Therefore, the meshing portion 35 is reliably lubricated and cooled by the oil. This reduces the load on the meshing portion 35 between the claws 42 of the parking pole 40 and the parking gear 31, thereby suppressing settling and wear at the meshing portion 35. As a result, improved durability of the parking pole 40 (including the claws 42) and the parking gear 31 can be expected. Furthermore, stable operation of the parking mechanism 30 can be expected due to a stabilized coefficient of friction. Furthermore, because the load on the parking pole 40 is reduced, for example, the parking pole 40 can be made smaller and lighter. Furthermore, the oil supply path can be simplified, resulting in reduced costs and improved assembly. In this embodiment, oil is also supplied to the protrusions 43 formed on the parking pole 40. Therefore, the sliding surface (contact surface) between the protrusion 43 and the parking gear 31 is also lubricated along with the meshing portion 35.

As described above, in this embodiment, the parking pole 40 is disposed below the parking gear 31, and the cam 47 is disposed below the parking pole 40. The cam 47 is also disposed adjacent to the meshing portion 35. Therefore, in the lubrication structure 1 of the present invention, the oil scooped up is released directly or indirectly toward the cam 47 through the opening 13. Specifically, the oil released toward the meshing portion 35 falls toward the cam 47 located below the meshing portion 35. Therefore, the cam 47, which is in sliding contact with the parking pole 40, is lubricated and cooled by the oil. This reduces the load on the sliding surfaces between the parking pole 40 and the cam 47, thereby suppressing wear and tear on the meshing portion 35 between the claw 42 and the parking gear 31. Furthermore, the coefficient of friction of the sliding surfaces can be stabilized, ensuring stable operation of the parking mechanism 30. As a result, the lubrication structure 1 described above makes it possible to narrow the width of the parking pole 40, which is expected to enable the parking pole 40 to be made smaller and lighter.

As described above, the lubrication structure 1 of the present invention uses the rotational force of the primary pulley 20 (rotating body 20) in the CVT 2 to scoop up oil and to supply the oil to the parking mechanism 30. Therefore, the lubrication structure 1 of the present invention can be configured with a simple mechanism. Furthermore, in the lubrication structure 1 of the present invention, at least a portion of the cover 10 is formed along the circumferential direction of the primary pulley 20, and the opening 13 is open in the tangential direction at the outer periphery of the primary pulley 20 and faces the rotational direction of the primary pulley 20. Therefore, the scooped-up oil is smoothly released from the opening 13 as the primary pulley 20 rotates. This more reliably lubricates and cools the parking mechanism 30 with the oil.

The above is one embodiment of the lubrication structure 1 according to the present invention, but the lubrication structure 1 according to the present invention is not limited to the above-described embodiment and can be modified in various ways.

In this embodiment, an engine is used as the power source, but various other power sources can be used. For example, the power source may be a motor. In this embodiment, the rotating shaft 26 (secondary shaft 26) rotates indirectly as power is output, but power may be transmitted directly to the rotating shaft 26. Various shapes and sizes of parking poles 40 can be used. In this embodiment, the parking pole 40 includes a protrusion 43, but the protrusion 43 may be provided as needed, and the parking pole 40 may not include a protrusion 43. The shapes and sizes of the claws 42 of the parking pole 40 and the parking gear 31 can also be changed to various shapes and sizes as long as they are capable of meshing.

The cover 10 only needs to cover at least a portion of the outer periphery of the rotating body 20 (primary pulley 20), and it is also possible for the cover 10 to be formed around the entire circumference of the rotating body 20. Rotating bodies 20 of various shapes and sizes can be used as long as they are capable of scooping up oil. Rotating bodies 20 are not limited to those used as primary pulleys 20, and various gears and pulleys can be used. Rotating bodies 20 can also rotate in various directions, not just in the direction described in this embodiment. For example, those that rotate counterclockwise or in both directions can also be used.

In addition, in this embodiment, the opening 13 of the cover 10 is formed to open toward the meshing portion 35, but it does not necessarily have to be formed to open toward the meshing portion 35 as long as oil is actually supplied to the meshing portion 35. For example, oil may be supplied indirectly to the meshing portion 35. In addition, in this embodiment, the opening 13 is formed to open in the tangential direction at the outer periphery of the rotating body 20 and is open toward the rotational direction of the rotating body 20, but the lubrication structure 1 of the present invention is not limited to this. The opening 13 can be open in various directions as long as oil is supplied to the desired portion of the parking mechanism 30. In addition, oil of various properties can be used, such as lubricating oil or fluid (hydraulic oil).

In this embodiment, the cam 47 is disposed adjacent to the meshing portion 35, and oil is released directly or indirectly toward the cam 47 through the opening 13, but the lubrication structure 1 of the present invention is not limited to this. The cam 47 can be disposed in various positions depending on the shape and size of the parking pole 40 or the position where the parking pole 40 is disposed. The shape and size of the cam 47 can also be formed in various shapes and sizes depending on the shape and size of the parking pole 40. The parking pole 40 does not have to be driven by the cam 47, and may be driven directly. In such cases, oil should be appropriately lubricated to the sliding parts of the parking pole 40.

Furthermore, the parking pole 40 does not have to be located below the parking gear 31; it can be located in various positions that allow it to mesh with the parking gear 31. For example, the parking pole 40 may be located to the side or above the parking gear 31. In such cases, the shape of the cover 10, the opening direction of the opening 13, or the position of the cam 47 can be changed to match the position of the meshing portion 35.

In this embodiment, the lubrication structure 1 is provided in the CVT 2, but the lubrication structure 1 of the present invention can be used to lubricate not only the CVT 2 but also various stopping mechanisms (parking mechanisms 30). For example, it can also be used in parking mechanisms provided in automatic transmissions (ATs). In such cases, various gears, pulleys, etc. can be used as the rotating body 20. Furthermore, the parking gear 31 is not limited to those provided in the secondary pulley 25, but can also be provided in various gears and rotating shafts that can cut off input power.

The above are various embodiments and modifications of the lubrication structure 1 according to the present invention, but the present invention is not limited to the above-described embodiments and modifications. Those skilled in the art will readily understand that other embodiments are possible within the scope of the claims and the teachings and spirit of the present invention.

The lubrication structure of the present invention can be used to lubricate various parking mechanisms. The lubrication structure of the present invention can also be used to lubricate parking mechanisms in transmissions such as CVTs and transaxles. The lubrication structure of the present invention can also be used in various vehicles, including engine vehicles, hybrid vehicles, and electric vehicles.

1: Lubrication structure 2: Continuously variable transmission (CVT)
10: Cover 13: Opening 20: Primary pulley (rotating body)
25: Secondary pulley 26: Secondary shaft (rotating shaft)
28: Endless belt 29: Storage case 30: Parking mechanism 31: Parking gear 32: Teeth 35: Meshing portion 40: Parking pole 41: Support shaft 42: Claw

Claims (2)

A lubrication structure for a parking mechanism including a parking gear rotatably supported on a rotary shaft that rotates directly or indirectly in response to power output, a support shaft disposed adjacent to the parking gear, and a parking pole supported so as to be swingable around the support shaft in a direction toward and away from the parking gear, the parking pole having a claw that can engage with the parking gear in response to the swinging motion,
a rotating body disposed adjacent to the parking pole and rotating directly or indirectly in response to the output of the power;
a cover that covers at least a part of the outer periphery of the rotating body,
the rotating body is at least partially immersed in oil and can scrape up the oil as it rotates;
the cover has an opening formed so as to be open toward an engagement portion between the parking gear and the claw,
the parking pole is disposed at a position where a position of the parking pole in a rotation axis direction of the rotating body overlaps with a position of the parking pole in the rotation axis direction of the rotating body,
The oil scooped up by the rotation of the rotor is discharged through the opening toward the meshing portion ,
a cam for moving the parking pole closer to the parking gear around the support shaft,
The cam is disposed adjacent to the meshing portion,
At least a portion of the cover is formed along the circumferential direction of the rotating body, and the opening is formed to be open in a tangential direction of the outer periphery of the rotating body and to be open toward the rotation direction of the rotating body,
The oil is discharged directly or indirectly toward the cam through the opening . The parking pole is disposed below the parking gear,
2. The lubrication structure according to claim 1 , wherein the cam is disposed below the parking pole.