STRUCTURE FOR LUBRICATING A CLUTCH

Abstract

Structure for lubricating a clutch, comprising the structure: an oil collecting groove (11) arranged along an inner circumference of a gear ring (10) on one side of a gear wheel (30), and an oil hole (12) which passes through the gear ring (10) and which connects the oil collecting groove (11) to an interior of a clutch hub (21), the oil hole (12) having: an inlet (12a) arranged on a side near the oil collecting groove (11), and an outlet (12b) arranged on a side near the clutch hub (21), wherein an oil guide groove (210) is arranged on an inner circumference of the clutch hub (21), and wherein the oil guide groove (210) surrounds the outlet (12b) of the oil hole (12) and guides the oil passing through the outlet (12b) to the other side of the gear wheel (30), so that the oil mixes with the oil distributed to the other side of the gear wheel (30), wherein the oil hole (12) is formed so that it is inclined from the inlet (12a) to the outlet (12b) in the direction from one side to the other side of the gear wheel (30) towards the oil guide groove (210), and wherein a rounded corner (211) designed to guide a movement of the oil is arranged on a side of the oil guide groove (210) facing one side of the gear wheel (30), and wherein the outlet (12b) of the oil hole (12) is arranged adjacent to the rounded corner (211) on a side of the rounded corner (211) facing the other side of the gear wheel (30).

Description

TECHNICAL FIELD

[0001] The present invention relates to a structure for lubricating a clutch. BACKGROUND

[0002] Generally, a hybrid vehicle refers to a vehicle powered by an efficient combination of two or more different types of power sources. The hybrid vehicle typically uses an internal combustion engine and an electric motor-generator. At low speeds, the hybrid vehicle uses the electric motor-generator as a main power source, which has relatively good low-speed torque characteristics, and at high speeds, it uses the internal combustion engine as a main power source, which has relatively good high-speed torque characteristics. Therefore, at low speeds, the hybrid vehicle uses the electric motor-generator while stopping the operation of the internal combustion engine that uses fossil fuel, and thus the hybrid vehicle has an excellent effect of improving fuel economy and reducing exhaust gases.

[0003] A power transmission device for a hybrid vehicle in the related art includes a planetary gear set, a plurality of electric motor generators used as electric motors and electric generators, a torque transmission mechanism capable of controlling rotating elements of the planetary gear set, and a battery used as a power source for the electric motor generator. The planetary gear set includes a sun gear, a carrier engaged with an outer periphery of the sun gear and configured to support rotation of gears, and a ring gear engaged with the gears on an inner periphery thereof.

[0004] Fig. 1 is a view illustrating a structure for lubricating a clutch in the related art. As shown in Fig. 1, in the related art, in order to lubricate a clutch having a clutch hub 2a and clutch discs 2b arranged outside a ring gear 1, oil O scattered from a gear wheel 3 is distributed to one side and the other side of the gear wheel 3 arranged in the ring gear 1, as indicated by the arrow shown in Fig. 1 is shown.

[0005] However, in the related technique, when the oil is distributed to one side and the other of the gear based on the gear center, only the oil delivered to the other side of the gear is used to lubricate the clutch. Therefore, the amount of lubrication of the clutch is inevitably insufficient.

[0006] In this regard, the present invention proposes a mechanism in which an oil hole is provided in a ring gear connected to an oil collecting groove and a clutch hub, thereby increasing the amount of lubrication of a clutch. [Related art document][Patent document] (Patent Document 1) Korean Patent Application Laid-Open KR 10-2009-0037730 A (published on April 16, 2009) US 2016 / 0 369 870 A1 discloses a gear change device. JP 2004 - 044 723 A discloses a lubricating structure for a transmission and a manufacturing method for the lubricating structure. JP H07 - 19 320 A discloses a gear ring. JP 2010 - 019 273 A discloses a lubricating structure of a transmission. OVERVIEW

[0007] The present invention has for its object to provide a structure for lubricating a clutch in which a hole is provided in a gear connected to an oil collecting groove and a clutch hub, thereby increasing the amount of lubrication of the clutch.

[0008] An embodiment of the present invention provides a structure for lubricating a clutch, the structure comprising: an oil collecting groove arranged along an inner circumference of a ring gear on one side of a gear; and an oil hole passing through the ring gear and connecting the oil collecting groove to an interior of a clutch hub, the oil hole having: an inlet arranged on one side near the oil collecting groove, and an outlet arranged on one side near the clutch hub, an oil guide groove being arranged on an inner circumference of the clutch hub, the oil guide groove surrounding the outlet of the oil hole and guiding the oil passing through the outlet to the other side of the gear, so that the oil mixes with the oil distributed to the other side of the gear, the oil hole being formed so thatthat it is inclined from the inlet to the outlet in the direction from one side of the gear to the other side of the oil guide groove, and wherein a rounded corner designed to guide a movement of the oil is arranged on a side of the oil guide groove facing one side of the gear, and wherein the outlet of the oil hole is arranged adjacent to the rounded corner on a side of the rounded corner facing the other side of the gear.

[0009] The clutch hub may be equipped with a through hole connected to a clutch disc.

[0010] In accordance with the present invention, the oil hole is provided in the ring gear and connected to the oil collecting groove and the clutch hub, thereby increasing the amount of lubrication of the clutch.

[0011] In accordance with the present invention, it is possible to improve durability of the clutch by increasing the amount of lubrication.

[0012] The foregoing overview is merely illustrative and not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view illustrating a structure for lubricating a clutch in the related art. Fig. 2 is a view illustrating a structure for lubricating a clutch in accordance with an exemplary embodiment of the present invention. Fig. 3 is an enlarged view of part A in Fig. 2.

[0013] It should be understood that the attached drawings are not necessarily to scale, but present a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, particular sizes, orientations, positions, and shapes, will be determined in part by the particular intended application and environment of use.

[0014] In the figures, reference numerals refer to the same or corresponding parts of the present invention throughout the several figures of the drawings. DETAILED DESCRIPTION

[0015] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when assigning reference numerals to constituent elements of the respective drawings, it should be noted that the same constituent elements are denoted by the same reference numerals wherever possible, even if the constituent elements are illustrated in different drawings. In addition, in describing the present invention, specific descriptions of publicly known related configurations or functions will be omitted when it is determined that the specific descriptions may obscure the subject matter of the present invention.Furthermore, the exemplary embodiments of the present invention will be described below, but the technical idea of ​​the present invention is not limited thereto and can of course be modified and variously implemented by those skilled in the art.

[0016] In the related art, when oil is distributed to one side and the other of the gear based on a center of the gear, only oil delivered to the other side of the gear is used to lubricate the clutch. For this reason, the amount of lubrication of the clutch is inevitably insufficient. In view of this, the present invention proposes a mechanism in which an oil hole is provided in a ring gear, which is connected to an oil collecting groove and a clutch hub, thereby increasing the amount of lubrication of a clutch.

[0017] Fig. 2 is a view illustrating a structure for lubricating a clutch in accordance with an exemplary embodiment of the present invention, and Fig. 3 is an enlarged view of part A in Fig. 2.

[0018] The present invention is characterized in that an oil collecting groove 11 and an oil hole 12 are formed in a ring gear 10 to increase the amount of lubrication by oil supplied to a clutch hub 21 and clutch discs 22. The ring gear 10, which has the oil collecting groove 11 and the oil hole 12, is arranged in a housing together with the clutch hub 21 and the clutch discs 22.

[0019] Specifically, gears 30 mesh with an inner portion of the ring gear 10. The oil collecting groove 11 is formed along an inner periphery of the ring gear 10 on one side of the gear 30. The oil collecting groove 11 is recessed to facilitate oil collection.

[0020] The oil scattered from the gear 30 is distributed to one side and the other side of the gear 30. Oil O distributed to one side of the gear 30 is collected in the oil collecting groove 11 of the gear 10.

[0021] The oil collected in the oil collecting groove 11 is introduced into the clutch hub 21 through the oil hole 12. The oil hole 12 is connected to the inside of the clutch hub 21 and the oil collecting groove 11.

[0022] The oil hole 12 has an inlet 12a into which the oil is introduced and an outlet 12b from which the oil is discharged. The inlet 12a is located on a side near the oil collecting groove 11, and the outlet 12b is located on a side near the clutch hub 21.

[0023] The oil hole 12 is formed in the shape of an inclined hole inclined from the inlet 12a toward the outlet 12b.

[0024] Since the oil hole 12 is inclined from the inlet 12a toward the outlet 12b as described above, the oil passing through the outlet 12b can naturally move toward the clutch disc 22.

[0025] An oil guide groove 210 is provided in an inner periphery of the clutch hub 21. The oil guide groove 210 is formed to surround the outlet 12b of the oil hole 12. The oil guide groove 210 has a rounded corner 211.

[0026] The oil scattered from the gear 30 and distributed to one side of the gear 30 is collected in the oil collecting groove 11 and introduced into the inlet 12a of the oil hole 12. The oil introduced into the inlet 12a of the oil hole 12 is discharged into the clutch hub 21 through the outlet 12b of the oil hole 12.

[0027] The oil discharged from the outlet 12b of the oil hole 12 is guided through the oil guide groove 210 and naturally mixes with the oil distributed to the other side of the gear 30. Since the oil discharged from the outlet 12b of the oil hole 12 mixes with the oil distributed to the other side of the gear 30 as described above, it is possible to maximize the amount of lubrication by the oil supplied to the clutch hub 21 and the clutch disc 22.

[0028] The rounded corner 211 provided on one side of the oil guide groove 210 serves to guide the oil discharged from the outlet 12b of the oil hole 12 so that the oil can move toward the clutch disc 22 and mix with the oil distributed to the other side of the gear 30.

[0029] The clutch hub 21 has a through hole 21a. The through hole 21a is provided at a position corresponding to the clutch disc 22. The through hole 21a is provided in the clutch hub 21 and connected to the clutch disc 22. The oil in the clutch hub 21 can move to the clutch disc 22 through the through hole 21a.

[0030] The oil discharged from the outlet 12b of the oil hole 12 and the oil distributed to the other side of the gear wheel 30 mix with each other and are then supplied to the clutch disc 22 through the through hole 21a.

[0031] Next, an operation of moving the oil in the structure for lubricating a clutch in accordance with the present invention will be described more specifically.

[0032] The oil distributed from one side and the other side of the gear 30 by the operation of the gear 30 is as shown by the arrows shown in Fig. 2 are shown, indicated moves.

[0033] In particular, as in Fig. 2 and Fig. As shown in Figure 3, the oil is supplied to the gear wheel 30 through a gear shaft 40 on which the gear wheels 30 are axially mounted. The gear wheel 30 may be axially mounted on the gear shaft 40 by means of a roller bearing 50.

[0034] The oil supplied to the gear 30 is distributed to one side and the other side of the gear 30 by the operation of the gear 30.

[0035] The oil O distributed to one side of the gear 30 is collected in the oil collecting groove 11 and moved to the oil hole 12. A portion of the oil O distributed to one side of the gear 30 can be supplied to a carrier 60 arranged on one side of the gear 30.

[0036] The oil is introduced into the inlet 12a of the oil hole 12 through the oil collecting groove 11, quickly passes through the inclined oil hole 12, and is discharged into the clutch hub 21 through the outlet 12b of the oil hole 12. Since the outlet 12b of the oil hole 12 is directed toward the oil guide groove 210, the oil discharged from the outlet 12b of the oil hole 12 can be accurately discharged toward the oil guide groove 210.

[0037] The oil O discharged into the clutch hub 21 moves to the other side of the gear 30 along the oil guide groove 210 surrounding the outlet 12b of the oil hole 12, and then mixes with the oil O distributed to the other side of the gear 30.

[0038] The oil discharged from the outlet 12b of the oil hole 12 can be smoothly moved to the other side of the gear 30 by means of the rounded corner 211 of the guide groove 210.

[0039] The oil discharged from the outlet 12b of the oil hole 12 and the oil O distributed to the other side of the gear wheel 30 mix with each other and are then supplied to the clutch disc 22 through the through hole 21a.

[0040] In the state where the amount of lubrication is increased, since the oil discharged from the outlet 12b of the oil hole 12 and the oil O distributed to the other side of the gear 30 mix with each other, the oil is supplied to the clutch disc 22. Accordingly, it is possible to improve the performance of the clutch discs 22 by increasing the amount of lubrication of the clutch discs 22, which is insufficient in the related art.

[0041] As described above, according to the present invention, the oil hole is provided in the ring gear and connected to the oil collecting groove and the clutch center, thereby increasing the amount of lubrication of the clutch. Additionally, according to the present invention, it is possible to improve the durability of the clutch by increasing the amount of lubrication.

Claims

[1] Structure for lubricating a clutch, comprising the structure: an oil collecting groove (11) arranged along an inner circumference of a gear ring (10) on one side of a gear wheel (30), and an oil hole (12) which passes through the gear ring (10) and which connects the oil collecting groove (11) to an interior of a clutch hub (21), the oil hole (12) having: an inlet (12a) arranged on a side near the oil collecting groove (11), and an outlet (12b) arranged on a side near the clutch hub (21), wherein an oil guide groove (210) is arranged on an inner circumference of the clutch hub (21), and wherein the oil guide groove (210) surrounds the outlet (12b) of the oil hole (12) and guides the oil passing through the outlet (12b) to the other side of the gear wheel (30), so that the oil mixes with the oil distributed to the other side of the gear wheel (30), wherein the oil hole (12) is formed so that it is inclined from the inlet (12a) to the outlet (12b) in the direction from one side to the other side of the gear wheel (30) towards the oil guide groove (210), and wherein a rounded corner (211) designed to guide a movement of the oil is arranged on a side of the oil guide groove (210) facing one side of the gear wheel (30), and wherein the outlet (12b) of the oil hole (12) is arranged adjacent to the rounded corner (211) on a side of the rounded corner (211) facing the other side of the gear wheel (30). [2] The structure according to claim 1, wherein the clutch hub (21) is provided with a through hole (21a) connected to a clutch disc (22).

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