Lubrication structure

Abstract

To provide a lubrication structure capable of reliably lubricating a parking mechanism in a simple construction.SOLUTION: A lubrication structure 1 is provided for lubricating a parking mechanism 30 which includes a parking gear 31, and a parking pole 40 rockingly supported in the direction of approaching / departing from the parking gear 31 and having a claw 42 to enable meshing with the parking gear 31. The lubrication structure 1 includes a rotary body 20 arranged in proximity to the parking pole 40 and adapted to be rotated with the output of power, and a cover 10 covering the outer periphery of the rotary body 20, the rotary body 20 being dipped in oil to pump up the oil with the rotation. The cover 10 has an opening part 13 part of which is formed to be opened to a meshing part 35 between the parking gear 31 and a claw 42 so that the oil pumped up with the rotation of the rotary body 20 is released via the opening part 13 to the meshing part 35.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lubrication structure for a parking mechanism provided in a transmission or the like. [Background technology]

[0002] Conventionally, various transmissions are provided with a parking mechanism (parking lock mechanism) for maintaining a parked state (see, for example, Patent Document 1). The parking mechanism described in Patent Document 1 above includes a parking gear attached to the output shaft of a planetary gear mechanism in the transmission, and a parking pole with a pawl that can mesh with the parking gear. The parking pole is 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 rotation of the parking gear reaches a predetermined speed.

[0003] However, with the above-mentioned parking mechanism, for example, there are 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, which could result in damage to the parking pole or parking gear. Even if the parking pole or parking gear is not damaged, there is a problem of thermal wear of the pole due to frictional heat between the parking pole and the parking gear. As a result, there is a concern that the engagement speed and disengagement speed limit between the parking pole and the parking gear may change, leading to malfunction of the parking mechanism. Therefore, the invention described in the above-mentioned Patent Document 1 discloses a drive device for lubricating a planetary gear mechanism and a parking mechanism. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-17825 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, the drive device described in the above-mentioned Patent Document 1 is configured to temporarily cause lubricating oil scooped up by a planetary gear located below the transmission to flow into a planetary gear mechanism housing case formed above the parking mechanism. Also, the above-mentioned drive device supplies the lubricating oil that has flowed into the planetary gear mechanism housing case to the parking mechanism by causing it to flow out from a hole formed below the planetary gear mechanism housing case.

[0006] However, the drive device 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 device described above has problems such as poor assembly due to the complex lubricating oil supply path, reduced assembly accuracy, and further increased costs.

[0007] SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lubrication structure that is simple in structure and can reliably lubricate a parking mechanism. [Means for solving the problem]

[0008] (1) The lubrication structure of the present invention, which is 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 swingable around the support shaft in a direction toward or away from the parking gear and has claws that can mesh with the parking gear as the parking gear swings, and is characterized by comprising: a rotating body 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 rotating body, at least a portion of the rotating body being immersed in oil and being able to 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 claws, and the oil scooped up as the rotating body rotates is released toward the meshing portion through the opening.

[0009] The above-described lubrication structure discharges oil (also referred to as lubricating oil, including fluid) scooped up by the rotation of the rotor toward the meshing portion between the claw of the parking pole and the parking gear in the parking mechanism (hereinafter simply referred to as the meshing portion). That is, the above-described lubrication structure can supply the scooped oil almost directly to the meshing portion, thereby reliably supplying the oil to the meshing portion. Therefore, the meshing portion is reliably lubricated and cooled by the oil. This reduces the load on the meshing portion between the claw of the parking pole and the parking gear, thereby suppressing wear and tear at the meshing portion. As a result, improved durability of the parking pole (including the claw) and the parking gear can be expected. 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, the parking pole can be made smaller and lighter. Furthermore, the simplified oil supply path can be expected to reduce costs and improve assembly ease.

[0010] (2) The lubrication structure of the present invention described above has a cam for bringing the parking pole 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.

[0011] The above-described lubrication structure allows the cam that slides against the parking pole to be lubricated and cooled by oil. This reduces the load on the sliding surface between the parking pole and the cam, and suppresses wear and tear on the meshing portion between the pawl and the parking gear. This makes it possible, for example, to narrow the width of the parking pole, which is expected to lead to smaller and lighter parking poles.

[0012] (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.

[0013] The above-described lubrication structure is configured such that 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-described lubrication structure can also provide oil lubrication to the sliding surfaces between the parking pole and the cam, improving the durability of the parking pole. This can be expected to make the parking pole smaller and lighter. Furthermore, the coefficient of friction between the sliding surfaces of the cam and the parking pole can be stabilized, ensuring stable operation of the parking mechanism.

[0014] (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.

[0015] The above-described lubrication structure can be configured to be suitable for a continuously variable transmission (CVT). That is, the rotational force of the primary pulley (rotating body) in the continuously variable transmission can be used to scoop up oil and to supply oil to the parking mechanism. Therefore, the above-described lubrication structure can be configured with a simple mechanism.

[0016] (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 be open in the tangential direction at the outer periphery of the rotating body and to be open toward the rotational direction of the rotating body.

[0017] The above-described lubrication structure is configured so that the oil scooped up is smoothly discharged from the opening as the rotor rotates, thereby more reliably lubricating and cooling the parking mechanism with oil. [Effects of the Invention]

[0018] The present invention can provide a lubrication structure that is simple in structure and can reliably lubricate a parking mechanism. [Brief explanation of the drawings]

[0019] [Figure 1] 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. [Figure 2] 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. [Figure 3] 1 is a cross-sectional view of a lubrication structure according to an embodiment of the present invention, viewed from above. DETAILED DESCRIPTION OF THE INVENTION

[0020] A lubrication structure 1 according to an embodiment of the present invention will be described below with reference to Figures 1 to 3. In this embodiment, the lubrication structure 1 will be described as an example provided to lubricate a parking mechanism 30 in a continuously variable transmission 2 (CVT: Continuous Variable Transmission) mounted on a vehicle. In this embodiment, the lubrication structure 1 will be described as an example provided to lubricate a parking mechanism 30 in a continuously variable transmission 2 (CVT2). In addition, in this embodiment, the rotating body 20 will be described as an example formed of a primary pulley 20 in the continuously variable transmission 2 (also referred to as CVT2).

[0021] First, the CVT 2 in which the lubrication structure 1 is formed will be described below with reference to Fig. 3. The CVT 2 is configured to change the speed of the power output from an engine (not shown) mounted on a vehicle and transmit it to a drive shaft (not shown). The CVT 2 has a primary pulley 20, a secondary pulley 25, an endless belt 28, a housing case 29 that houses these, and the like.

[0022] The primary pulley 20 is made up 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 (rearward of the vehicle). The primary fixed sheave 20A is supported so as to be rotatable integrally with the primary shaft 21. The primary fixed sheave 20A and the primary moving sheave 20B each have a conical surface facing each other. A cover 10 (see FIGS. 1 and 2) that constitutes the lubrication structure 1, which will be described later, is provided on the outer periphery of the primary pulley 20.

[0023] The primary moving sheave 20B is slidable in the front-to-rear direction along the primary shaft 21 and is supported so as to be rotatable integrally with the primary shaft 21. A primary piston 22 is provided on the front side (front side of the vehicle) of the primary moving sheave 20B. The primary piston 22 can move the primary moving sheave 20B toward or away from the primary fixed sheave 20A. In this embodiment, the primary pulley 20 is set to rotate in the direction of the arrow shown in Figures 1 and 2 (clockwise when viewed from the rear side of the vehicle).

[0024] As shown in Figure 3, the secondary pulley 25 is made up 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 a secondary shaft 26 (also referred to as a rotating shaft 26). Therefore, the secondary shaft 26 rotates indirectly in response to the output of the engine. The opposing surfaces of the secondary fixed sheave 25A and the secondary moving sheave 25B are formed in a conical shape.

[0025] The secondary moving sheave 25B is slidable in the front-to-rear 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 or away from the secondary fixed sheave 25A.

[0026] The endless belt 28 is, for example, a steel belt, and is wound around the primary pulley 20 and the secondary pulley 25. The position where the endless belt 28 is clamped (the looping diameter) on the primary pulley 20 changes as the primary moving sheave 20B approaches or moves away from the primary fixed sheave 20A. Also, the position where the endless belt 28 is clamped (the looping diameter) on the secondary pulley 25 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.

[0027] As shown in FIGS. 1 and 2, the housing case 29 is cylindrically formed so as to be able to integrally house the primary pulley 20, the secondary pulley 25 (see FIG. 3), the endless belt 28 (see FIG. 3), a parking mechanism 30 (described later), and the like. The housing case 29 is filled with oil (also called 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 FIG. 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.

[0028] Next, the parking mechanism 30 lubricated by the lubrication structure 1 of the present invention will be described in detail below with reference to FIGS.

[0029] As shown in Figures 1 and 2, the parking mechanism 30 includes a parking gear 31, a support shaft 41 arranged adjacent to the parking gear 31, a parking pole 40 rotatably supported on the support shaft 41, and claws 42 and protrusions 43 formed on the parking pole 40.

[0030] A parking gear 31 is supported on the front side of the secondary pulley 25 (see FIG. 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 on its outer periphery at a predetermined pitch.

[0031] The teeth 32 are formed with a protrusion amount (height) and pitch that allow a predetermined amount of meshing with the claws 42 of the parking pole 40, which will be described later. The teeth 32 form meshing portions 35 by meshing with the claws 42.

[0032] A support shaft 41 is disposed 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.

[0033] The parking pole 40 is formed in a rod shape and is disposed so as to be located below the parking gear 31. The base end side of the parking pole 40 is supported rotatably on a support shaft 41, and the parking pole 40 can swing around the support shaft 41 in a direction toward or away from the parking gear 31.

[0034] The parking pole 40 has a claw 42 at the tip end of the surface facing the parking gear 31, which can mesh with the parking gear 31. The parking pole 40 also has a protrusion 43 at a position offset from the claw 42 in the swing radius direction.

[0035] 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 the P range (for example, the D range or the B range), the pawl 42 and the parking gear 31 are separated and do not mesh.

[0036] As shown in Fig. 2, a cam mechanism 45 is provided below the tip end 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-rear direction, and a cam 47 supported on the tip end 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 front side in the figure). This allows the cam 47 to move the parking pole 40 closer to the parking gear 31 around the support shaft 41.

[0037] When the driver operates the shift lever or shift switch on the driver's seat to place the vehicle in parking range (also called P range), the cam mechanism 45 can move the camshaft 46 toward the parking pole 40. As a result, the parking pole 40 is pushed up by the cam 47 so as to swing toward the parking gear 31 against the biasing force of the spring.

[0038] The pawl 42 is formed on the surface of the parking pole 40 on the parking gear 31 side at the tip end. The pawl 42 is formed to protrude toward the parking gear 31 and is formed to a size that allows it to mesh with the teeth 32 of the parking gear 31. The pawl 42 is formed to protrude from the surface of the parking pole 40 that faces 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.

[0039] 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 with each other. The protrusion 43 is disposed 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 formed to protrude in the same direction as the pawl 42. The protrusion 43 is formed so as to be able to come into contact with the tooth tip 33 of the parking gear 31 when the parking pole 40 is brought close to the parking gear 31.

[0040] Furthermore, the protruding portion 43 is formed so that its protruding end conforms to the tooth tip forming surface of the parking gear 31 when in contact with the tooth tip 33. That is, a wide contact area is ensured between the protruding portion 43 and the tooth tip 33 of the parking gear 31, so that the load does not concentrate at one point. Furthermore, the protruding end of the protruding portion 43 is formed so as to be inclined in a direction along the tangent to the surface of the tooth tip 33 of the parking gear 31 when in contact with the tooth tip 33. This ensures an even wider contact area between the protruding portion 43 and the tooth tip 33 of the parking gear 31, so that the load is further prevented from concentrating at one point.

[0041] Furthermore, the protrusion 43 is formed with a protrusion amount (height) that forms a gap that prevents contact between the claw 42 and the tooth tip 33 of the parking gear 31. Therefore, when the parking pole 40 is brought close to the parking gear 31, the protrusion 43 abuts against the tooth tip 33 of the parking gear 31. Therefore, the protrusion 43 serves as a stopper, and a gap is formed between the claw 42 and the tooth tip 33 of the parking gear 31. This prevents contact (also referred to as deep meshing) between the claw 42 and the tooth tip 33 of the parking gear 31 when the parking pole 40 swings toward the parking gear 31. As described above, in this embodiment, it is not necessary to increase the rigidity and strength of the parking pole 40 (including the claw 42) and the parking gear 31 more than necessary, thereby preventing an increase in manufacturing costs. Furthermore, since contact between the claw 42 and the tooth tip 33 is prevented, noise generation is also reduced.

[0042] Next, a detailed description will be given below of the lubrication structure 1 for lubricating the parking mechanism 30. The lubrication structure 1 includes a cover 10 that covers at least a part of the outer periphery of the primary pulley 20, and the like.

[0043] As shown in Figures 1 and 2, the cover 10 has an arc portion 11 formed circumferentially from the upper end side to the lower end side of the primary pulley 20, and an extension portion 12 formed extending from the arc portion 11 toward the meshing portion 35.

[0044] In this embodiment, the arc portion 11 is the inner wall of the casing 29 extending from the upper end to the lower end. The arc portion 11 is not limited to an arc shape and can be changed to various shapes and sizes depending on the shape and size of the primary pulley 20 or the characteristics of the oil used.

[0045] The extension 12 is formed by branching the inner wall of the lower end of the casing 29 in a tangential direction of the primary pulley 20 and extending it in a substantially straight line. That is, the extension 12 is formed integrally with the casing 29. Therefore, the cover 10 does not need to be separately assembled to the casing 29, the primary pulley 20, or the like. This simplifies the assembly work of the CVT 2 and is expected to result in cost reduction. The extension 12 is formed toward the meshing portion 35. The extension 12 has an opening 13 that is open 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, and the like.

[0046] The opening 13 is formed to be open in the tangential direction of the outer periphery of the primary pulley 20, and is open toward the rotation direction of the primary pulley 20 (the direction of the arrow in the drawing).

[0047] The cover 10 has a hole 14 (see FIG. 1) on the lower end side, which allows the 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 the oil flowing in from the storage case 29 and the oil injected from the injection nozzle 15.

[0048] 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 side). 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.

[0049] Furthermore, the oil scooped up 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 ease of 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 lubricated together with the meshing portion .

[0050] 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 discharged directly or indirectly toward the cam 47 through the opening 13. Specifically, the oil discharged 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, which contributes to stable operation of the parking mechanism 30. As a result, in the lubrication structure 1 described above, for example, the width of the parking pole 40 can be narrowed, and therefore the parking pole 40 can be expected to be made smaller and lighter.

[0051] As described above, the lubrication structure 1 of the present invention can scoop up oil by utilizing the rotational force of the primary pulley 20 (rotating body 20) in the CVT 2 and can also supply oil to the parking mechanism 30 by utilizing the rotational force. 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 formed to be open in the tangential direction at the outer periphery of the primary pulley 20 and is open toward 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.

[0052] 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 embodiment described above, and various modifications can be made.

[0053] In this embodiment, an engine is exemplified as the power source, but various other power sources can be used as the power source. For example, the power source may be a motor. In addition, in this embodiment, the rotating shaft 26 (secondary shaft 26) is indirectly rotated in response to the output of power, but the power may be directly transmitted to the rotating shaft 26. In addition, parking poles 40 of various shapes and sizes can be used. In this embodiment, the parking pole 40 is exemplified as having a protrusion 43, but the protrusion 43 may be provided as needed, and the protrusion 43 may not be provided. In addition, the shapes and sizes of the claws 42 of the parking pole 40 and the parking gear 31 can be changed to various shapes and sizes as long as they can be meshed.

[0054] Furthermore, 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 to form the cover 10 around the entire periphery of the rotating body 20. Furthermore, the rotating body 20 can be of various shapes and sizes as long as it is capable of scooping up oil. Furthermore, the rotating body 20 is not limited to that used as the primary pulley 20, and various gears and pulleys can be used. Furthermore, the rotating direction of the rotating body 20 is not limited to that of this embodiment, and it can be rotated in various directions. For example, a counterclockwise rotating body or a bidirectional rotating body can also be used.

[0055] Furthermore, in this embodiment, the opening 13 of the cover 10 is formed to open toward the meshing portion 35. However, as long as oil is substantially supplied to the meshing portion 35, it does not necessarily have to be formed to open toward the meshing portion 35. For example, oil may be indirectly supplied to the meshing portion 35. Furthermore, in this embodiment, the opening 13 is formed to open in the tangential direction of the outer periphery of the rotating body 20 and 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 toward various directions as long as oil is supplied to the parts of the parking mechanism 30 that need to be lubricated. Furthermore, various types of oil, such as lubricating oil and fluid (hydraulic oil), can be used.

[0056] In this embodiment, the cam 47 is disposed adjacent to the meshing portion 35, and oil is discharged 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 a case, oil may be appropriately lubricated to the sliding portion of the parking pole 40.

[0057] Furthermore, the parking pole 40 need not necessarily be disposed below the parking gear 31, but may be disposed in various positions where it can mesh with the parking gear 31. For example, the parking pole 40 may be disposed 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 where the cam 47 is disposed may be changed to match the position of the meshing portion 35.

[0058] 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 stop 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.

[0059] 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 those exemplified in the above-mentioned embodiments and modifications, and it will be easily understood by those skilled in the art that other embodiments are possible within the scope of the claims in accordance with the teachings and spirit thereof. [Industrial Applicability]

[0060] 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, transaxles, etc. The lubrication structure of the present invention can also be used in various vehicles such as engine vehicles, hybrid vehicles, and electric vehicles. [Explanation of symbols]

[0061] 1: Lubrication structure 2: Continuously variable transmission (CVT) 10: Cover 13: Opening 20: Primary pulley (rotating body) 25: Secondary pulley 26: Secondary axis (rotation axis) 28: Endless belt 29: Storage case 30: Parking mechanism 31: Parking gear 32: Teeth 35: Interlocking part 40: Parking pole 41: Support shaft 42: Nails

Claims

1. 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.

2. 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.

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