JP2012233516A - Lubricant supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricant supply device that can suppress an increase in an oil level around a gear for sending a lubricant above in a vertical direction by rotation.SOLUTION: The lubricant supply device includes: a case 2; a partition member 3 that partitions an inner space of the case into a first region R and a second region R2, and forms an opening 5 connecting the first region with the second region; the gear 4 that is disposed in the first region and sends the lubricant in the first region above in the vertical direction by rotation; and a predetermined member 6 that is provided in the second region to block the flow of the lubricant flowing toward the opening.

Description

  The present invention relates to a lubricating oil supply apparatus.

  Conventionally, techniques for balancing the amount of oil around a gear in a manual transmission or the like have been disclosed. For example, in Patent Document 1, an oil return rib that guides the oil splashed to the inner wall of the casing at a portion where the oil jumps in a room where the amount of oil agitation is large is provided, and the oil guided by the oil return rib is provided. A casing structure of a manual transmission is disclosed in which an oil return hole for returning to an adjacent room is provided in a partition wall. According to the casing structure of the manual transmission of patent document 1, it is supposed that the oil balance of the some room divided in the casing can be taken.

Japanese Patent Laid-Open No. 11-118027

  When the lubricating oil is sent vertically upward in the case by rotating the gear, if the oil level of the lubricating oil around the gear increases, the friction increases or the efficiency of sending the lubricating oil by the gear decreases. There's a problem. As an example, when the oil level around the gear is increased due to the inclination of the case, there is a risk of increased friction. It is desired that the oil level around the gears can be prevented from rising.

  An object of the present invention is to provide a lubricating oil supply device that can suppress an increase in the oil level around a gear that sends lubricating oil vertically upward by rotation.

  The lubricating oil supply apparatus of the present invention includes a case, a partition member that partitions the space in the case into a first region and a second region, and forms an opening that communicates the first region and the second region. And a gear that is arranged in the first region and sends the lubricating oil in the first region upward in the vertical direction by rotation, and a predetermined member that is arranged in the second region and blocks the flow of the lubricating oil toward the opening. It is characterized by providing.

  In the lubricating oil supply apparatus, the partition member extends along an outer peripheral surface of the gear, and a second region forming surface that is a surface that forms the second region of the partition member includes a bottom surface of the case. The predetermined members are preferably disposed between the second region forming surface and the bottom surface.

  The said lubricating oil supply apparatus WHEREIN: The said predetermined member is arrange | positioned in the 2nd area | region formation surface which forms said 2nd area | region in the said partition member, It has a partition member side predetermined member which protrudes from the said 2nd area | region formation surface. preferable.

  In the lubricating oil supply apparatus, it is preferable that the predetermined member includes a case-side predetermined member that is disposed on an inner wall surface of the case that forms the second region and protrudes from the inner wall surface that forms the second region. .

  In the lubricating oil supply apparatus, the predetermined member is disposed on the second region forming surface, is disposed on the partition member-side predetermined member protruding from the second region forming surface, and is disposed on the bottom surface and protrudes from the bottom surface. Preferably, the partition member side predetermined member and the bottom surface side predetermined member are alternately arranged along the flow direction of the lubricating oil toward the opening.

  In the lubricating oil supply apparatus, it is preferable that in the second region, the flow passage cross-sectional area of the lubricating oil toward the opening decreases as it goes toward the opening.

  In the lubricating oil supply apparatus, the partition member is disposed between an outer peripheral surface of the gear and a bottom surface of the case, and is opposed to the bottom surface, and the partition member is in a direction along the bottom surface. The opening is formed at the end of the first region, and the predetermined member is closer to the opening than the end of the second region in the direction along the bottom surface of the partition member. Preferably it is in position.

  In the lubricating oil supply apparatus, the partition member extends in a direction intersecting with the bottom surface of the case, and the opening is formed between an end portion on the bottom surface side of the partition member and the bottom surface. It is preferable that

  The lubricating oil supply apparatus according to the present invention includes a case, a partition member that partitions the space in the case into a first region and a second region, and forms an opening that communicates the first region and the second region; A gear that is arranged in the first region and feeds the lubricating oil in the first region upward in the vertical direction by rotation, and a predetermined member that is arranged in the second region and blocks the flow of the lubricating oil toward the opening. The lubricating oil supply apparatus according to the present invention has an effect that the lubricating oil can be prevented from flowing from the second region into the first region, and the oil level around the gears can be prevented from rising.

FIG. 1 is a diagram illustrating a main part of a lubricating oil supply apparatus according to an embodiment. Drawing 2 is an explanatory view of arrangement of the predetermined member concerning an embodiment. Drawing 3 is an explanatory view of the modification in arrangement of the predetermined member concerning an embodiment. Drawing 4 is an explanatory view of other modifications in arrangement of the predetermined member concerning an embodiment. FIG. 5 is a diagram illustrating an example of a main part of the power transmission device during climbing.

  Hereinafter, a lubricating oil supply apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
The embodiment will be described with reference to FIGS. 1 to 5. The present embodiment relates to a lubricating oil supply apparatus. FIG. 1 is a diagram illustrating a main part of a lubricating oil supply apparatus according to the embodiment, FIG. 2 is an explanatory diagram of the arrangement of the predetermined member according to the embodiment, and FIG. 3 is a modification example of the arrangement of the predetermined member according to the embodiment. FIG. 4 is an explanatory diagram of another modified example of the arrangement of the predetermined members according to the embodiment.

  The lubricating oil supply apparatus (see reference numeral 1-1 in FIG. 1) of the present embodiment is a diff ring gear (reference numeral in FIG. 1) in a final reduction gear of a vehicle power transmission apparatus (T / A, see reference numeral 1 in FIG. 1). 4), and the lubricating oil is collected in a catch tank (see reference numeral 7 in FIG. 1) provided at the upper part in the case. Lubricating oil in the catch tank 7 is supplied to each part of the power transmission device 1. The lubricating oil supply device 1-1 includes a differential chamber separation rib (see reference numeral 3 in FIG. 1) that separates the differential ring gear 4 from other parts, and further includes a communication hole (see reference numeral 5 in FIG. 1). ) And a predetermined member (see reference numeral 6 in FIG. 1) that protrudes in the direction of obstructing the oil flow. Thereby, the lubricating oil supply apparatus 1-1 of this embodiment can suppress the raise of the oil level around the diff ring gear 4. FIG. Therefore, according to the lubricating oil supply apparatus 1-1 of this embodiment, the scraping performance by the diff ring gear 4 can be improved, and the friction loss can be reduced to improve the fuel efficiency.

  In the present specification, unless otherwise specified, the description relating to the position of each element of the power transmission device 1 and the description relating to the relative positional relationship describe the position in a state where the vehicle is horizontally arranged. And

  In FIG. 1, the code | symbol 1 shows a power transmission device. The power transmission device 1 is mounted on, for example, a hybrid vehicle. Lubricating oil (for example, ATF) is stored in the case 2 of the power transmission device 1. A diff ring gear 4 is disposed in the case 2. The diff ring gear 4 is connected to the left and right drive wheels of the hybrid vehicle via a differential mechanism (not shown). The diff ring gear 4 is a gear that rotates in conjunction with the rotation of the drive wheel. The diff ring gear 4 sends the lubricating oil stored in the lower part in the case 2 by rotation.

  The diff ring gear 4 receives power output from an engine or motor generator that is a power source of the hybrid vehicle. The power input to the diff ring gear 4 is transmitted to the drive wheels to drive the hybrid vehicle.

  In the power transmission device 1, the lubricating oil is supplied to each part by the lubricating oil supply device 1-1. The lubricating oil supply apparatus 1-1 of the present embodiment includes a case 2, a differential chamber separation rib 3, a differential ring gear 4, and a predetermined member 6.

  The diff ring gear 4 is disposed in the lower part of the case 2 in the vertical direction and on the rear side in the vehicle front-rear direction. When the lubricating oil is stored in the lower part in the case 2, at least a part of the diffring gear 4, for example, the lower part of the diffring gear 4 is immersed in the lubricating oil. An arrow Y1 indicates the rotation direction of the diff ring gear 4 when the hybrid vehicle moves forward. When the hybrid vehicle moves forward, the diff ring gear 4 rotates in a rotational direction in which a lower portion in the vertical direction moves toward the rear side of the vehicle. The diff ring gear 4 is an external gear, and has a plurality of teeth formed continuously in the circumferential direction. In the present specification, unless otherwise specified, the “axial direction” indicates the axial direction of the diffring gear 4.

  The differential chamber separation rib 3 is a partition member that partitions the space in the case 2 into a differential chamber (first region) R1 and a gear chamber (second region) R2. The differential chamber separation rib 3 is disposed on the front side in the vehicle front-rear direction with respect to the differential ring gear 4, and is disposed between the outer peripheral surface 4 a of the differential ring gear 4 and the bottom surface 2 a of the case 2. The differential chamber separation rib 3 faces the vehicle front side and the vertical lower side region of the outer peripheral surface 4a of the differential ring gear 4, in other words, faces the bottom surface 2a of the case 2 and rotates downward in the vertical direction when the vehicle moves forward. It extends along the area. The differential chamber separation rib 3 has an arc shape concentric with the outer peripheral surface 4a of the diff ring gear 4 when viewed in the axial direction, and is disposed at a position away from the outer peripheral surface 4a of the diff ring gear 4 by a predetermined distance. .

  The upper end of the differential chamber separation rib 3 is positioned slightly above the center axis C1 of the differential ring gear 4 in the vertical direction, and the lower end 3b of the differential chamber separation rib 3 is the position of the lower end in the vertical direction of the differential ring gear 4 It is located slightly above the vertical direction.

  The differential chamber separation rib 3 is a plate-like rib that is disposed on the side wall surface facing the side surface of the differential ring gear 4 in the case 2 and protrudes from the side wall surface. As shown in FIG. 4, the case 2 has side wall surfaces 2 b and 2 c that face the side surfaces of the diffring gear 4. The right side wall surface 2 b faces the side surface of the diff ring gear 4 on the right side of the vehicle. The left wall surface 2 c faces the side surface of the diff ring gear 4 on the left side of the vehicle. The differential chamber separating rib 3 connects the right wall surface 2 b and the left wall surface 2 c in the axial direction of the differential ring gear 4. That is, the differential chamber separation rib 3 connects the side wall surfaces 2b and 2c facing each other across the differential ring gear 4 in the axial direction, and restricts the movement of the lubricating oil between the differential chamber R1 and the gear chamber R2. ing.

  Returning to FIG. 1, the differential chamber R <b> 1 is a region closer to the differential ring gear 4 than the differential chamber separation rib 3 in the axial direction of the differential ring gear 4. The differential chamber R <b> 1 is a chamber-shaped space portion surrounded by the differential chamber separation rib 3 and the case 2. That is, the differential ring gear 4 is disposed in the differential chamber R1 that is a space on one side partitioned by the differential chamber separation rib 3. The gear chamber R <b> 2 is a region opposite to the diff ring gear 4 side with respect to the diff chamber separation rib 3 in the axial direction view of the diff ring gear 4. The gear chamber R <b> 2 is a chamber-shaped space portion surrounded by the differential chamber separation rib 3 and the case 2. The differential chamber R1 and the gear chamber R2 communicate with each other through an opening 5 described later. The differential chamber R1 and the gear chamber R2 communicate with each other on the upper side in the vertical direction with respect to the differential chamber separation rib 3.

  When the diff ring gear 4 rotates during forward travel of the hybrid vehicle, the lubricating oil in the diff chamber R1 is sent upward in the vertical direction as indicated by an arrow Y2 in FIG. An oil path for lubricating oil is formed between the outer periphery of the diff ring gear 4 and the case 2. When the diffring gear 4 rotates, the lubricating oil is guided upward in the vertical direction by this oil passage as indicated by an arrow Y2. The lubricating oil sent by the diff ring gear 4 flows into the catch tank 7. The catch tank 7 is disposed vertically above the diff ring gear 4. The catch tank 7 is an oil receiving portion that receives the lubricating oil sent upward in the vertical direction by the diff ring gear 4.

  The lubricating oil that has flowed into the catch tank 7 is supplied to a portion to be lubricated of the power transmission device 1, for example, each gear or motor generator. The lubricating oil that has been supplied to the lubricated part and lubricated and cooled each part falls in the gear chamber R2 and is stored in the lower part of the gear chamber R2. A part of the lubricating oil supplied to each part falls into the differential chamber R1.

  An opening 5 is formed at the lower end of the differential chamber separation rib 3. The opening 5 is formed between the lower end 3 b of the differential chamber separation rib 3 and the bottom surface 2 a of the case 2. The lower end 3b of the differential chamber separation rib 3 is an end portion on the bottom surface 2a side of the differential chamber separation rib 3, and an end portion on the differential chamber R1 side (rear side) in the direction along the bottom surface 2a (vehicle longitudinal direction). is there. The lower end 3b of the differential chamber separating rib 3 is separated from the bottom surface 2a of the case 2 in the vertical direction, and an opening 5 through which lubricating oil can flow is provided between the lower end 3b and the bottom surface 2a of the differential chamber separating rib 3. Is formed. The differential chamber R1 and the gear chamber R2 communicate with each other through the opening 5.

  In the present embodiment, the vertical width of the opening 5 approximates the vertical width of the gap between the lower end of the diff ring gear 4 and the bottom surface 2a. That is, the flow passage cross-sectional area of the oil passage formed between the outer periphery of the diff ring gear 4 and the case 2 is approximate to the flow passage cross-sectional area of the opening 5. The channel cross-sectional area of the opening 5 may be larger than the channel cross-sectional area of the oil passage.

  By the rotation of the diff ring gear 4, the lubricating oil is sent toward the catch tank 7, so that the oil level of the lubricating oil in the def chamber R 1 is lowered. As a result, when the oil level in the differential chamber R1 becomes lower than the oil level in the gear chamber R2, the lubricating oil in the gear chamber R2 flows toward the differential chamber R1 as shown by the arrow Y3 due to the hydraulic head pressure difference, and the opening 5 Flows into the differential chamber R1.

  In the lubricating oil supply apparatus 1-1 of the present embodiment, the dynamic oil level position of the differential chamber R 1 when the differential ring R 4 rotates by communicating the differential chamber R 1 and the gear chamber R 2 through the opening 5. Can be adjusted. For example, the dynamic oil level position of the differential chamber R1 can be lowered by reducing the flow path cross-sectional area of the opening 5. When the dynamic oil level position of the differential chamber R1 decreases, the friction of the differential ring gear 4 decreases. In addition, when the position of the dynamic oil surface in the differential chamber R1 is lowered, the lifting performance of the differential ring gear 4, that is, the supply capability of feeding the lubricating oil to the catch tank 7 by the rotating differential ring gear 4 is improved. According to the lubricating oil supply apparatus 1-1 of this embodiment, the flow path cross-sectional area of the opening 5 is determined in advance so that the dynamic oil level position at which the diffring gear 4 can appropriately perform the lifting performance can be realized. Thus, it is possible to appropriately supply a necessary amount of lubricating oil to the lubricated part.

  As described above, the differential chamber R1 is separated from the gear chamber R2 by the differential chamber separation rib 3, so that the oil level of the differential chamber R1 can be suppressed. There is a risk that the oil level will rise and scraping performance will be reduced. For example, when the diff ring gear 4 rotates at a high speed, the lubricating oil in the gear chamber R2 is drawn into the diff chamber R1 by the rotation of the diff ring gear 4, and the dynamic oil level rises. As a result, the ability of the diff ring gear 4 to send the lubricating oil toward the catch tank 7 may be reduced, and the friction may be increased.

  FIG. 5 is a diagram illustrating an example of a main part of the power transmission device during climbing. As shown in FIG. 5, in the uphill state, the differential chamber R1 is lowered downward in the vertical direction with respect to the gear chamber R2 than when traveling on a flat road. Due to the change in the head pressure difference, in the uphill state, the lubricating oil is more likely to flow from the gear chamber R2 to the differential chamber R1 than when traveling on a flat road, and the dynamic oil level of the differential chamber R1 rises. As a result, the friction of the diffring gear 4 may increase, or the performance of sending the lubricating oil toward the catch tank 7 may be reduced.

  As shown in FIG. 1, the lubricating oil supply device 1-1 of the present embodiment includes a predetermined member 6 that blocks the flow of lubricating oil toward the opening 5 in the gear chamber R <b> 2. As a result, as will be described below, the dynamic oil level in the differential chamber R1 during the high-speed rotation of the differential ring gear 4 or in a climbing state is suppressed.

  The predetermined member 6 is disposed between the second region forming surface 3 a of the differential chamber separating rib 3 and the bottom surface 2 a of the case 2. The second region forming surface 3a is a surface that forms the gear chamber R2 in the differential chamber separation rib 3, in other words, a surface opposite to the differential chamber R1 side. The differential chamber separating rib 3 is curved toward the bottom surface 2a that forms the gear chamber R2, and the second region forming surface 3a faces the bottom surface 2a.

  The predetermined member 6 is a rib formed on each of the differential chamber separating rib 3 and the bottom surface 2 a of the case 2. A bottom surface side predetermined member 61, which is the predetermined member 6 disposed on the bottom surface 2a, protrudes from the bottom surface 2a. The bottom surface side predetermined member 61 protrudes from the bottom surface 2a toward the second region forming surface 3a, and is curved toward the opposite side of the opening 5 toward the tip. In other words, the bottom surface side predetermined member 61 is curved toward the upstream side in the flow direction Y3 of the lubricating oil when the diffring gear 4 rotates, from the proximal end to the distal end.

  The partition member side predetermined member 62 which is the predetermined member 6 disposed on the differential chamber separation rib 3 protrudes from the second region forming surface 3a. The partition member-side predetermined member 62 protrudes from the second region forming surface 3a toward the bottom surface 2a and is curved toward the opposite side of the opening 5 toward the tip. In other words, the partition member-side predetermined member 62 is curved so as to go upstream in the flow direction Y3 of the lubricating oil when the diffring gear 4 rotates, from the proximal end to the distal end.

  The predetermined member 6 is disposed in the vicinity of the opening 5 in the gear chamber R2. Specifically, the predetermined member 6 is located at a position closer to the opening 5 in the direction along the bottom surface 2 a than the end 3 c on the front side of the vehicle in the differential chamber separation rib 3. The end portion 3c on the vehicle front side is an end portion on the gear chamber R2 side in the direction along the bottom surface 2a of the case 2 in the differential chamber separation rib 3. In other words, the predetermined member 6 is positioned behind the front end 3c of the differential chamber separating rib 3 in the vehicle front-rear direction and in the vertical direction lower side than the front end 3c of the differential chamber separation rib 3 when the hybrid vehicle is horizontally disposed. doing. Accordingly, the predetermined member 6 is located on the downstream side of the front end 3c of the differential chamber separation rib 3 with respect to the flow direction Y3 of the lubricating oil in the gear chamber R2 when the vehicle moves forward.

  The predetermined member 6 protrudes from each of the second region forming surface 3a and the bottom surface 2a in a direction intersecting with the flow of the lubricating oil, and hinders the flow of the lubricating oil in the gear chamber R2. The predetermined member 6 generates a turbulent flow in the lubricating oil flow by preventing the lubricating oil flow. Due to the occurrence of this turbulent flow, the predetermined member 6 can make the equivalent orifice of the opening 5 smaller than when the predetermined member 6 is not provided. By reducing the diameter of the equivalent orifice, the amount of lubricating oil flowing from the gear chamber R2 into the differential chamber R1 via the opening 5 is reduced. Therefore, the dynamic oil level of the differential chamber R1 is lowered, and the lifting performance by the differential ring gear 4 is improved.

  In the present embodiment, the differential chamber separation rib 3 extends along the outer peripheral surface 4 a of the differential ring gear 4. In other words, the differential chamber separation rib 3 extends in a direction intersecting the bottom surface 2a of the case 2, and extends downward along the bottom surface 2a from the gear chamber R2 side to the differential chamber R1 side. It is inclined to. Further, the lower end 3 b of the differential chamber separation rib 3 forms an opening 5. That is, the opening 5 is formed between the end of the differential chamber separating rib 3 on the bottom 2a side and the bottom 2a.

  Thereby, in the gear chamber R <b> 2, the flow passage cross-sectional area of the lubricating oil toward the opening 5 decreases as it goes toward the opening 5. As shown in FIG. 2, the flow passage width W of the lubricating oil that flows through the gear chamber R <b> 2 toward the opening 5 decreases as it goes toward the opening 5 in the gear chamber R <b> 2. The predetermined member 6 is disposed in the oil passage in which the cross-sectional area of the flow path decreases in this way toward the downstream side. The arrangement and shape of the predetermined member 6 may be determined so that turbulent flow can be generated when the flow rate of the lubricating oil in the gear chamber R2 is equal to or higher than a predetermined value. In this way, the predetermined member 6 does not generate turbulent flow when the flow rate of the lubricating oil flowing from the gear chamber R2 into the differential chamber R1 through the opening 5 is small, and turbulent flow when the flow rate is large. And the amount of lubricating oil flowing into the differential chamber R1 can be suppressed. Further, according to the predetermined member 6, the diameter of the equivalent orifice can be reduced as the flow rate of the lubricating oil in the gear chamber R2 increases.

  When the lubricating oil flow from the gear chamber R2 toward the differential chamber R1 is about to increase in the uphill state, the predetermined member 6 blocks the flow of the lubricating oil supply device 1-1 of the present embodiment. An increase in the amount of lubricating oil flowing into R1 can be suppressed. When traveling on a slope with a steep slope, the degree to which the predetermined member 6 hinders the flow of the lubricating oil is greater than when traveling on a slope with a gentle slope. Thereby, it is suppressed that the dynamic oil level of differential chamber R1 rises according to the gradient of the road which drive | works. The rise in the dynamic oil level of the differential chamber R1 is suppressed, so that a decrease in the lifting performance of the differential ring gear 4 is suppressed.

  Moreover, the lubricating oil supply apparatus 1-1 of this embodiment can suppress that the lubricating oil of the gear chamber R2 is drawn into the differential chamber R1 when the differential ring gear 4 rotates at high speed. When the flow of lubricating oil from the gear chamber R2 toward the differential chamber R1 is about to increase when the differential ring gear 4 rotates at a high speed, the predetermined member 6 blocks the flow, thereby increasing the amount of lubricating oil flowing into the differential chamber R1. Can be suppressed.

  The predetermined member 6 has a shape that can generate a vortex in the flow of the lubricating oil. The predetermined member 6 is curved in a shape protruding toward the downstream side in the lubricating oil flow direction Y3 when the diff ring gear 4 rotates. Thereby, the predetermined member 6 can generate a vortex in the flow of the lubricating oil and reduce the flow velocity of the lubricating oil in the gear chamber R <b> 2 that flows toward the opening 5. In the present embodiment, the predetermined member 6 is curved so as to go upstream in the flow direction Y3 of the lubricating oil when the diff ring gear 4 rotates as it goes toward the tip. For this reason, the predetermined member 6 can guide the flow of the lubricating oil to the base end side. For example, the bottom surface side predetermined member 61 can guide the flow of the lubricating oil from the front end to the bottom surface 2a at the base end and back flow toward the upstream side in the flow direction Y3. Further, the partition member-side predetermined member 62 can guide the flow of the lubricating oil from the distal end to the second region forming surface 3a at the proximal end and back flow toward the upstream side in the flow direction Y3.

  Further, in the present embodiment, as shown in FIGS. 1 and 2, the partition member side predetermined member 62 and the bottom surface side predetermined member 61 flow in the lubricating oil toward the opening 5, that is, when the diffring gear 4 rotates. Are alternately arranged along the flow direction Y3 of the lubricating oil. Since the bottom surface side predetermined member 61 and the partition member side predetermined member 62 are arranged out of phase, the predetermined members 61 and 62 generate turbulent flow at different positions along the flow direction Y3. Therefore, as will be described below, it is possible to appropriately secure the flow passage cross-sectional area of the gap between the bottom surface side predetermined member 61 and the partition member side predetermined member 62 and to suppress the increase in the dynamic oil level of the differential chamber R1. It can be compatible.

  The bottom surface side predetermined member 61 protrudes from the bottom surface 2a toward the second region forming surface 3a, and the partition member side predetermined member 62 protrudes from the second region forming surface 3a toward the bottom surface 2a. Increases the area that blocks the flow of lubricating oil toward the opening 5, and the amount of lubricating oil flowing from the gear chamber R2 into the differential chamber R1 can be suppressed.

  As a means for suppressing the inflow amount of the lubricating oil from the gear chamber R2 to the differential chamber R1 and suppressing the rise of the dynamic oil surface of the differential chamber R1, it is conceivable to reduce the flow passage cross-sectional area of the opening 5. However, simply reducing the cross-sectional area of the flow path may cause a problem that it takes time to adjust the oil when the lubricating oil is injected into the power transmission device 1.

  The predetermined member 6 of the present embodiment does not simply reduce the cross-sectional area of the flow path but reduces the diameter of the equivalent orifice by generating turbulent flow. When the flow rate of the lubricating oil flowing toward the opening 5 in the gear chamber R2 is large, the substantial flow path cross-sectional area of the opening 5 can be made smaller than when the flow rate is small.

  On the other hand, when the flow rate of the lubricating oil in the gear chamber R2 is not large, the substantial flow path cross-sectional area of the opening 5 increases, so that a sufficient amount of lubricating oil flows between the gear chamber R2 and the differential chamber R1. Can flow. Further, since the bottom surface side predetermined member 61 and the partition member side predetermined member 62 are alternately arranged along the flow direction Y3, a sufficient amount of lubricating oil can be obtained when the flow rate of the lubricating oil is small. It can flow into the differential chamber R1. For example, when the differential ring gear 4 rotates at a low speed, the lubricating oil flows from the gear chamber R2 into the differential chamber R1 at an appropriate flow rate.

  As described above, the predetermined member 6 ensures an appropriate flow path cross-sectional area when the flow speed of the lubricating oil is low, and a substantial reduction of the cross-sectional area of the flow path when the flow speed of the lubricating oil is high. It is a member that can be compatible.

  In addition, the bottom face side predetermined member 61 and the partition member side predetermined member 62 may each be multiply arranged. For example, a plurality of partition member-side predetermined members 62 may be disposed on the differential chamber separation rib 3 along the flow direction Y3 of the lubricating oil when the diffring gear 4 rotates, and the flow of the lubricating oil when the diffring gear 4 rotates. A plurality of bottom surface side predetermined members 61 may be disposed on the bottom surface 2a along the direction Y3. In this case, it is preferable that the bottom surface side predetermined member 61 and the partition member side predetermined member 62 are alternately arranged along the flow direction Y3.

  In the present embodiment, the bottom surface side predetermined member 61 and the partition member side predetermined member 62 are alternately arranged along the flow direction Y3. Instead, as shown in FIG. The partition member side predetermined member 62 may be disposed at a position facing each other.

  In the predetermined member 6 shown in FIG. 3, the bottom surface side predetermined member 61 and the partition member side predetermined member 62 are opposed to each other with the flow of lubricating oil interposed therebetween. The bottom surface side predetermined member 61 protrudes from the bottom surface 2 a toward the partition member side predetermined member 62, and the partition member side predetermined member 62 protrudes from the second region forming surface 3 a toward the bottom surface side predetermined member 61.

  Further, the predetermined member 6 may be provided so as to protrude from the side wall surface of the case 2 as shown in FIG. FIG. 4 is a view of the predetermined member 6, the differential chamber separation rib 3 and the differential ring gear 4 as viewed from the front side of the vehicle. The predetermined member 6 shown in FIG. 4 includes a right wall side predetermined member 63 disposed on the right wall surface 2b and a left wall side predetermined member 64 disposed on the left wall surface 2c. The predetermined members 63 and 64 are provided in the vicinity of the opening 5 in the gear chamber R <b> 2, similarly to the bottom surface side predetermined member 61 and the partition member side predetermined member 62.

  Thus, not only the bottom surface 2a but also a case-side predetermined member that is disposed on the inner wall surface of the case 2 that forms the gear chamber R2 and protrudes from the inner wall surface may be provided. The case-side predetermined member can be disposed on at least one inner wall surface of the bottom surface 2a, the right wall surface 2b, or the left wall surface 2c.

  The right side wall side predetermined member 63 shown in FIG. 4 extends from the right side wall surface 2b toward the left side wall surface 2c to the central portion in the axial direction of the diff ring gear 4. On the other hand, the left side wall side predetermined member 64 extends from the left side wall surface 2c toward the right side wall surface 2b to the central portion of the diff ring gear 4 in the axial direction. The right side wall predetermined member 63 and the left side wall predetermined member 64 may each be connected to the bottom surface 2a. In FIG. 4, the right side wall side predetermined member 63 and the left side wall side predetermined member 64 do not overlap in the vehicle front-rear direction view, but the present invention is not limited to this.

  The right side wall predetermined member 63 and the left side wall predetermined member 64 may be arranged alternately along the flow direction Y3, or may be arranged so as to face each other in the axial direction. Further, the right side wall side predetermined member 63 and the left side wall side predetermined member 64 may have a curved shape similar to the bottom surface side predetermined member 61 and the partition member side predetermined member 62.

  The lubricating oil supply device 1-1 of the present embodiment is not limited to the power transmission device 1 of the hybrid vehicle, and may be applied to other power transmission devices, for example, a power transmission device of an MT (manual transmission).

  The contents disclosed in the above embodiments can be executed in appropriate combination.

1-1 Lubricating oil supply device 1 Power transmission device 2 Case 2a Bottom surface 3 Differential chamber separation rib (partition member)
3a Second area forming surface 4 Differential ring 5 Opening 6 Predetermined member 61 Bottom face side predetermined member 62 Partition member side predetermined member R1 Differential chamber (first area)
R2 Gear room (second area)

Claims (8)

Case and
A partition member that partitions the space in the case into a first region and a second region, and that forms an opening that communicates the first region and the second region;
A gear that is arranged in the first region and sends the lubricating oil in the first region upward in the vertical direction by rotation;
A predetermined member disposed in the second region and blocking a flow of lubricating oil toward the opening;
A lubricating oil supply device comprising: The partition member extends along the outer peripheral surface of the gear,
A second region forming surface, which is a surface forming the second region in the partition member, is opposed to the bottom surface of the case;
The lubricating oil supply apparatus according to claim 1, wherein the predetermined member is disposed between the second region forming surface and the bottom surface. The lubrication according to claim 1 or 2, wherein the predetermined member includes a partition member-side predetermined member that is disposed on a second region forming surface that forms the second region of the partition member and protrudes from the second region forming surface. Oil supply device. The said predetermined member is arrange | positioned at the inner wall surface of the said case which forms said 2nd area | region, and has a case side predetermined member which protrudes from the said inner wall surface which forms said 2nd area | region. The lubricating oil supply device according to 1. The predetermined member includes a partition member-side predetermined member that is disposed on the second region forming surface and protrudes from the second region forming surface, and a bottom surface-side predetermined member that is disposed on the bottom surface and protrudes from the bottom surface. Have
The lubricating oil supply device according to claim 2, wherein the partition member-side predetermined member and the bottom surface-side predetermined member are alternately arranged along a flow direction of the lubricating oil toward the opening. The lubricating oil supply device according to any one of claims 1 to 5, wherein, in the second region, a flow passage cross-sectional area of the lubricating oil toward the opening decreases as it goes toward the opening. The partition member is disposed between an outer peripheral surface of the gear and a bottom surface of the case, and is opposed to the bottom surface;
The partition member forms the opening at the end on the first region side in the direction along the bottom surface,
The lubricating oil supply according to any one of claims 1 to 6, wherein the predetermined member is located at a position closer to the opening portion than an end portion on the second region side in a direction along the bottom surface of the partition member. apparatus. The partition member extends in a direction intersecting the bottom surface of the case;
The lubricating oil supply apparatus according to any one of claims 1 to 7, wherein the opening is formed between an end of the partition member on the bottom surface side and the bottom surface.

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