Oil supply mechanism for transmission device

Abstract

To provide an oil supply mechanism of a transmission device capable of supplying oil to a supply object as necessary.SOLUTION: A lubrication object member 14, a cooling object member 15, and a first inclined part 21 which is disposed above the lubrication object member 14 and protrudes downward and is inclined downward from one end 21a toward the other end 21b and a second inclined part 22 which is disposed above the cooling object member 15 and is inclined downward from one end 22a toward the other end 22b are provided.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an oil supply mechanism for a transmission. [Background technology]

[0002] Patent Document 1 discloses a power transmission device in which a rib is provided on the inner wall surface of a casing to guide oil (lubricating oil) into an oil passage. The rib has a shape in which its inclined end is convex toward the opening of the oil passage, and the oil is guided to the convex end of the rib. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-123932 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the structure described in Patent Document 1, even when it is desired to reduce the amount of oil supplied to the oil supply target, the ribs always guide the oil to the oil supply target. Therefore, there is room for improvement in order to supply oil to the oil supply target as needed.

[0005] The present invention has been made in view of the above circumstances, and has an object to provide an oil supply mechanism for a transmission that can supply oil to a supply target as needed. [Means for solving the problem]

[0006] In order to achieve the above object, the oil supply mechanism of the transmission of the present invention comprises: A lubrication target member; a member to be cooled; a first inclined portion and a second inclined portion that are disposed above the member to be lubricated, protrude downward, and are inclined downward from one end to the other end; and The second inclined portion is A groove is formed at the lower end along the extending direction, One end of the cooling member is connected to the other end of the first inclined portion, and at least the other end of the cooling member is disposed above the member to be cooled. Transmission oil supply mechanism.

[0007] In the oil supply mechanism for a transmission device having this configuration, when the temperature is low and cooling of the member to be cooled is not necessary, the oil adhering to the first inclined portion drips from the first inclined portion and is supplied to the member to be lubricated. Furthermore, when the temperature rises and the member to be cooled requires cooling, the viscosity of the oil decreases, and the oil that has reached one end of the second inclined portion from the other end of the first inclined portion flows down the groove of the second inclined portion to the other end of the second inclined portion. The oil that has reached the other end of the second inclined portion then drips onto the member to be cooled below, cooling the member to be cooled by the oil. In this way, oil can be supplied to each target member as needed, the target members can be well lubricated, and the target members can be appropriately cooled by the oil. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an oil supply mechanism for a transmission that can supply oil to a supply target as needed. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic side view of an oil supply mechanism for a transmission according to this embodiment. [Figure 2] FIG. 2 is a schematic front view of the oil supply mechanism of the transmission according to this embodiment. [Figure 3] FIG. 3 is a schematic front view of the second inclined portion of the oil supply mechanism, showing the groove of the second inclined portion. [Figure 4]FIG. 4 is a schematic side view of the oil supply mechanism of the transmission, illustrating the flow of oil when the temperature is low. [Figure 5] FIG. 5 is a schematic front view of the oil supply mechanism of the transmission, illustrating the flow of oil when the temperature is low. [Figure 6] FIG. 6 is a schematic side view of the oil supply mechanism of the transmission, illustrating the flow of oil when the temperature is high. [Figure 7] FIG. 7 is a schematic front view of the oil supply mechanism of the transmission, illustrating the flow of oil when the temperature is high. [Figure 8] FIG. 8 is a schematic side view of a transmission device according to a reference example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is a schematic side view of an oil supply mechanism 11 of a transmission 12 according to this embodiment. Fig. 2 is a schematic front view of the oil supply mechanism 11 of a transmission 12 according to this embodiment.

[0011] As shown in FIGS. 1 and 2 , an oil supply mechanism 11 according to this embodiment is provided in a transmission 12. The transmission 12 is mounted on a vehicle such as an automobile. The transmission 12 includes a member to be lubricated 14, which is a mechanism that requires lubrication with oil O, such as gears and bearings. The transmission 12 is covered by a casing 13, which stores oil O therein. The transmission 12 also includes a member to be cooled 15 therein. The member to be cooled 15 is a member that requires cooling when it generates heat as it is driven, such as a rotating machine such as a motor or a generator. The member to be cooled 15 is attached to a side wall 16 that constitutes the casing 13.

[0012] The oil supply mechanism 11 has a first inclined portion 21 and a second inclined portion 22. The oil supply mechanism 11 is disposed above the lubrication target member 14. The oil supply mechanism 11 is provided in the casing 13. The oil supply mechanism 11 may be integrally molded as a part of the casing 13. Alternatively, a separate oil supply mechanism 11 may be attached to the casing 13.

[0013] The first inclined portion 21 and the second inclined portion 22 of the oil supply mechanism 11 are each formed in a plate shape. The first inclined portion 21 is thinner than the second inclined portion 22. The first inclined portion 21 and the second inclined portion 22 of the oil supply mechanism 11 protrude downward and are both tapered downward. The lower end of the first inclined portion 21 slopes downward from one end 21a to the other end 21b. Similarly, the lower end of the second inclined portion 22 slopes downward from one end 22a to the other end 22b. The other end 21b of the first inclined portion 21 is connected to one end 22a of the second inclined portion 22, and the other end 22b of the second inclined portion 22 is connected to the side wall 16 of the casing 13. The other end 21b of the first inclined portion 21 is located higher than the one end 22a of the second inclined portion 22. The second inclined portion 22 is disposed above the member to be cooled 15. The other end 21b of the first inclined portion 21 and one end 22a of the second inclined portion 22 are not above the member to be cooled 15 and are disposed above the member to be lubricated 14.

[0014] FIG. 3 is a schematic front view of the second inclined portion 22 of the oil supply mechanism 11, showing the groove 23 of the second inclined portion 22. As shown in FIG. 3, the second inclined portion 22 has a groove 23 at its lower end. The groove 23 is formed along the extension direction of the second inclined portion 22, and allows the oil O that has entered therein to flow.

[0015] In the transmission 12 equipped with the oil supply mechanism 11, the oil O stored inside the casing 13 is scattered by the gears and pumps that constitute the transmission 12. The scattered oil O then adheres to the oil supply mechanism 11 and flows down. The oil O that adheres to the oil supply mechanism 11 and flows down flows in different ways depending on the temperature.

[0016] Next, a description will be given of how the oil O flows in the oil supply mechanism 11. In each drawing, the flow of the oil O is indicated by arrows.

[0017] (When the temperature is low) Fig. 4 is a schematic side view of the oil supply mechanism 11 of the transmission 12, illustrating the flow of the oil O when the temperature is low. Fig. 5 is a schematic front view of the oil supply mechanism 11 of the transmission 12, illustrating the flow of the oil O when the temperature is low. When the temperature of the oil O is low, the viscosity of the oil O is high. In this state, as shown in FIGS. 4 and 5 , the oil O adhering to the first inclined portion 21 of the oil supply mechanism 11 flows downward along the surface of the first inclined portion 21, reaches the lower end of the first inclined portion 21, and flows along the slope of the lower end of the first inclined portion 21 toward the other end 21b. Thereafter, due to its high viscosity, the oil O drips from the other end 21b of the first inclined portion 21 without flowing into the groove 23 of the second inclined portion 22. This allows the oil O to be supplied to the lubrication target member 14 located below the first inclined portion 21. Note that a portion of the oil O that reaches the lower end of the first inclined portion 21 drips from the lower end of the first inclined portion 21 and is supplied to the lubrication target member 14 below.

[0018] (When the temperature is high) Fig. 6 is a schematic side view of the oil supply mechanism 11 of the transmission 12, illustrating the flow of the oil O when the temperature is high. Fig. 7 is a schematic front view of the oil supply mechanism 11 of the transmission 12, illustrating the flow of the oil O when the temperature is high. When the temperature of the oil O is high, the viscosity of the oil O is low. In this state, as shown in FIGS. 6 and 7 , the oil O adhering to the first inclined portion 21 of the oil supply mechanism 11 flows downward along the surface of the first inclined portion 21, reaches the lower end of the first inclined portion 21, and flows along the slope of the lower end of the first inclined portion 21 toward the other end 21b. Thereafter, due to its low viscosity, the oil O enters the groove 23 at the lower end of the second inclined portion 22 from one end 22a of the second inclined portion 22, flows through the groove 23 toward the other end 22b of the second inclined portion 22, and drips from the other end 22b of the second inclined portion 22. As a result, the oil O is supplied to the target member 15 to be cooled that is located below the other end 22b of the second inclined portion 22. Note that a portion of the oil O that flows down the lower end of the second inclined portion 22 drips from the lower end of the second inclined portion 22 and is supplied to the target member 15 to be cooled below.

[0019] Here, if the member to be cooled 15 is, for example, a rotating machine such as a motor or a generator, supplying oil O at low temperatures that require warming up will result in heat being absorbed by the oil O, preventing smooth warming. For this reason, when the member to be cooled 15 requires warming up, oil O is required to be supplied to the member to be lubricated 14, and when the member to be cooled 15 requires cooling, oil O is required to be supplied to the member to be cooled 15.

[0020] According to the oil supply mechanism 11 of the transmission 12 of this embodiment, when the temperature is low and cooling of the member to be cooled 15 is not necessary, the oil O adhering to the first inclined portion 21 drips and is supplied to the member to be lubricated 14. In contrast, when the temperature rises and the member to be cooled 15 requires cooling, the viscosity of the oil O decreases, and the oil O that reaches one end 21 a of the second inclined portion 22 from the other end 21 b of the first inclined portion 21 flows along the groove 23 of the second inclined portion 22 to the other end 22 b of the second inclined portion 22. The oil O that reaches the other end 22 b of the second inclined portion 22 then drips onto the member to be cooled 15 below, and the member to be cooled 15 is cooled by the oil O.

[0021] Next, a reference example will be described. FIG. 8 is a schematic side view of a transmission device 12 according to a reference example.

[0022] 8, the reference example includes, for example, an electromagnetic switching valve 30. The switching valve 30 includes a first flow path 31 that supplies oil O to the lubrication target member 14 and a second flow path 32 that supplies oil O to the cooling target member 15, and is capable of switching the flow of oil O to either the first flow path 31 or the second flow path 32.

[0023] In this reference example, by switching the flow path of the oil O with the switching valve 30, it is possible to supply the oil O to the lubrication target member 14 when the cooling target member 15 needs to be warmed up, and to supply the oil O to the cooling target member 15 when the cooling target member 15 needs to be cooled. However, the reference example requires a sensor that detects the temperature of the oil O and an electromagnetic switching valve 30, which increases the number of parts and weight, and also increases costs.

[0024] In contrast, the oil supply mechanism 11 of the transmission device 12 according to this embodiment can suppress the increase in the number of parts, weight, and cost caused by using valves, sensors, etc., while supplying oil O to each target member as needed by changing the viscosity of the oil O with the temperature, thereby effectively lubricating the lubrication target members 14, and also allowing the cooling target members 15 to be appropriately cooled by the oil O. [Explanation of symbols]

[0025] 11 Oil supply mechanism 12 Transmission 14 Lubrication target parts 15 Cooling target material 21 1st slope part 21a,22a one end 21b, 22b other end 22 2nd slope part 23 Groove O Oil

Claims

[Claim 1] A lubrication target member; a member to be cooled; a first inclined portion and a second inclined portion that are disposed above the member to be lubricated, protrude downward, and are inclined downward from one end to the other end; and The second inclined portion is A groove is formed at the lower end along the extending direction, One end of the cooling member is connected to the other end of the first inclined portion, and at least the other end of the cooling member is disposed above the member to be cooled. Transmission oil supply mechanism.

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