device

Abstract

The device of the present application suppresses the case where oil wound by the first rotating body is stirred to fly to the second rotating body side. The device of the present application includes a housing that forms an oil bath that stores oil; a first rotating body that is disposed in the housing and at least a part of which is immersed in the oil in the oil bath; a second rotating body that is disposed in the housing and is disposed on the radially outer side of the first rotating body; a first wall portion that is provided between the first rotating body and the second rotating body; and a second wall portion that is provided on the gravitational direction upper side of the first wall portion and extends toward a direction away from the first rotating body.

Description

TECHNICAL FIELD

[0001] The present application relates to an apparatus. BACKGROUND

[0002] In Patent Literature 1, there is disclosed a transmission provided with a baffle that divides an oil storage portion in a case

[0003] The baffle has a separation wall that separates a space on the final gear side from a space on the driven sprocket side of the oil pump, thereby suppressing agitation of oil when the final gear and the driven sprocket rotate.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Laid-Open No. 2012-102818

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In the above-described structure, in a case where oil that is scooped up by the final gear (first rotary body) flies over the separation wall, a case is considered in which the oil is agitated by being caught on the drive sprocket (second rotary body) that drives the driven sprocket and a chain that links the two. SUMMARY

[0009] The present application has been achieved in view of such a technical problem, and has an object to suppress a case in which oil scooped up by a first rotary body is agitated by flying to a second rotary body side.

[0010] According to one embodiment of the present application, there is provided an apparatus including: a case that forms an oil bath that stores oil; a first rotary body that is disposed in the case and at least a portion of which is immersed in the oil in the oil bath; a second rotary body that is disposed in the case and is disposed radially outward of the first rotary body; a first wall portion that is disposed between the first rotary body and the second rotary body; and a second wall portion that is disposed on a gravity direction upper side of the first wall portion and extends toward a direction away from the first rotary body.

[0011] EFFECT OF THE INVENTION

[0012] According to the above-described embodiment, the apparatus includes the second wall portion that is disposed on the gravity direction upper side of the first wall portion and extends toward the direction away from the first rotary body. Therefore, it is possible to shield, by the second wall portion, oil that is scooped up by the first rotary body and flies over the first wall portion. Therefore, it is possible to suppress a case in which the oil scooped up by the first rotary body is agitated by flying to the second rotary body side. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1is a schematic view for explaining the outline structure of a vehicle equipped with the device of the embodiment of the present application.

[0014] Figure 2 is a view of the inside of the device as viewed from the hydraulic torque converter side.

[0015] Figure 3 is a perspective view of the plate. DETAILED DESCRIPTION

[0016] Hereinafter, a vehicle 100 equipped with a power transmission device 10 as a device of the embodiment of the present application will be described with reference to the drawings.

[0017] Figure 1 is a schematic view for explaining the outline structure of the vehicle 100. As shown in the figure, the vehicle 100 is equipped with an engine 1 and the power transmission device 10 provided in a power transmission path connecting the engine 1 and a drive wheel 9. Figure 1

[0018] In the present embodiment, the power transmission device 10 is a transmission, and is equipped with a transmission mechanism 20, a forward-reverse switching mechanism 30, a hydraulic torque converter 40, a gear set 50, a differential gear device 60, an oil pump 70, and a case 80 housing them.

[0019] In the vehicle 100, rotation generated by the engine 1 is transmitted to the drive wheel 9 via the hydraulic torque converter 40, the forward-reverse switching mechanism 30, the transmission mechanism 20, the gear set 50, and the differential gear device 60.

[0020] The hydraulic torque converter 40 has a lock-up clutch 41, and when the lock-up clutch 41 is coupled, an input shaft 42 and an output shaft 43 of the hydraulic torque converter 40 are directly connected, and the input shaft 42 and the output shaft 43 rotate at the same speed.

[0021] The transmission mechanism 20 has primary pulleys 21 and secondary pulleys 22 arranged in a V-shaped groove in order, and a belt 23 wound around the V-shaped grooves of the pulleys 21 and 22.

[0022] The engine 1 is arranged coaxially with the primary pulley 21, and between the engine 1 and the primary pulley 21, the hydraulic torque converter 40 and the forward-reverse switching mechanism 30 are provided in order from the engine 1 side.

[0023] ​The forward / rearward switching mechanism 30 has a double-pinion planetary gear set 31 as a main constituent element, the sun gear of which is combined with the output shaft 43 of the torque converter 40, and the carrier of which is combined with the primary pulley 21 of the transmission mechanism 20. The forward / rearward switching mechanism 30 further has a forward clutch 32 directly linking the sun gear and the carrier of the double-pinion planetary gear set 31, and a rearward brake 33 fixing the ring gear. Moreover, when the forward clutch 32 is engaged, the input rotation from the output shaft 43 is directly transmitted in the rotation direction to the primary pulley 21, and when the rearward brake 33 is engaged, the input rotation from the output shaft 43 is reversed and transmitted to the primary pulley 21.

[0024] The forward clutch 32 is engaged by supplying a clutch pressure from an oil pressure control valve unit (not shown) when the forward travel mode is selected as the travel mode of the vehicle 100. The rearward brake 33 is engaged by supplying a brake pressure from the oil pressure control valve unit when the rearward travel mode is selected as the travel mode of the vehicle 100.

[0025] The rotation of the primary pulley 21 is transmitted to the secondary pulley 22 via the belt 23, and the rotation of the secondary pulley 22 is transmitted to the drive wheels 9 via the output shaft 24, the gear set 50, and the differential gear device 60.

[0026] In order to change the speed ratio between the primary pulley 21 and the secondary pulley 22 in the above-described power transmission, one of the conical plates forming the V-shaped grooves of the primary pulley 21 and the secondary pulley 22 is set as a fixed conical plate 21a, 22a, and the other is set as a movable conical plate 21b, 22b that can be displaced in the axial direction.

[0027] These movable conical plates 21b, 22b are urged toward the fixed conical plates 21a, 22a by supplying a primary pulley pressure and a secondary pulley pressure from the oil pressure control valve unit, thereby causing the belt 23 to frictionally engage with the conical plates to perform power transmission between the primary pulley 21 and the secondary pulley 22.

[0028] In the speed change, the width of the V-shaped grooves of the two pulleys 21, 22 is changed by the differential pressure between the primary pulley pressure and the secondary pulley pressure generated in correspondence with a target speed ratio, and the winding arc diameter of the belt 23 with respect to the pulleys 21, 22 is continuously changed, thereby realizing the target speed ratio.

[0029] The gear set 50 has a first gear 51 provided to the output shaft 24 of the transmission mechanism 20; a second gear 52 and a third gear 53 provided to the intermediate shaft 55; and a fourth gear 54 fixed to the differential gear device 60 as a first rotation body.

[0030] The housing 80 has a main body portion 81, a cover 82, an intermediate cover 83, and an oil pan (not shown). The housing 80 forms an oil bath that stores oil.

[0031] The intermediate cover 83 is disposed between the hydraulic torque converter 40 and the forward / reverse switching mechanism 30 in such a way that it covers the side of the hydraulic torque converter 40 of the forward / reverse switching mechanism 30.

[0032] The drive sprocket 72, acting as the second rotating body, is rotatably supported on the intermediate cover 83 via a bushing 71. The drive sprocket 72 is connected to the output shaft 43 of the hydraulic torque converter 40 via a connecting member 73, and is also connected via a chain 76 to the driven sprocket 75 located on the input shaft 74 of the oil pump 70. Thus, when the output shaft 43 of the hydraulic torque converter 40 rotates, the oil pump 70 is driven to supply oil to the oil pressure control valve unit.

[0033] Next, refer to Figure 2 The internal structure of the power transmission device 10 will be described in detail.

[0034] Figure 2 This is a view of the interior of the power transmission device 10 from the side of the hydraulic torque converter 40. Figure 2 The left-right direction corresponds to the front-back direction of vehicle 100 (right direction is the front direction), and the vertical direction on the paper corresponds to the left-right direction of vehicle 100 (depth direction on the paper is the left direction). In addition, the solid arrow G indicates the direction of gravity, and the double-dotted line indicates the height of the oil level O in the oil bath.

[0035] like Figure 2 As shown, a differential gear device 60 with a fourth gear 54 fixedly mounted is disposed on the rear side of the vehicle 100 in the power transmission device 10.

[0036] A drive sprocket 72, which is rotatably supported on the intermediate cover 83 via a bushing 71, is disposed radially outside the fourth gear 54 and at the front of the vehicle 100 in the power transmission device 10. That is, the drive sprocket 72 and the fourth gear 54 are arranged in the longitudinal direction of the vehicle 100.

[0037] The forward / reverse switching mechanism 30 and the primary pulley 21 are located on the left side (inside the paper) of the vehicle 100, closer to the drive sprocket 72. Figure 2 Not shown in the image.

[0038] The intermediate cover 83 is fixed to the main body 81 by multiple bolts 84.

[0039] A driven sprocket 75 is disposed below the drive sprocket 72. The drive sprocket 72 and the driven sprocket 75 are connected by a chain 76.

[0040] The oil pump 70 is located on the left side of the vehicle 100, closer to the driven sprocket 75. Figure 2 Not shown in the image.

[0041] The first gear 51, the second gear 52, and the third gear 53 are arranged above the differential gear device 60.

[0042] The secondary pulley 22 is located on the left side of the vehicle 100 than the first gear 51, in Figure 2 which is not shown. In addition, the third gear 53 is located on the left side of the vehicle 100 than the second gear 52, in Figure 2 which is not shown.

[0043] The fourth gear 54 fixed to the differential gear device 60 is arranged in such a manner that a part thereof is immersed in oil stored in an oil bath. Therefore, in a case where the fourth gear 54 rotates in a clockwise direction in Figure 2 , as indicated by a hatched arrow, oil wound up by the fourth gear 54 is scattered to the side of the drive sprocket 72.

[0044] If the scattered oil adheres to the drive sprocket 72 or the chain 76, the oil is stirred, and thus the air contained in the oil increases, which is considered to affect the sound generated when the oil pump 70 sucks in the oil or the durability of the oil pump 70. In addition, it is considered that the driving resistance of the drive sprocket 72 or the like increases due to the increase in the air contained in the oil.

[0045] Therefore, the power transmission device 10 of the present embodiment has the plate 85 for suppressing the scattered oil wound up by the fourth gear 54 from being scattered to the side of the drive sprocket 72 between the fourth gear 54 and the drive sprocket 72.

[0046] Hereinafter, the plate 85 will be described in detail with reference to Figure 2 , Figure 3 . Figure 3 is a perspective view of the plate 85.

[0047] As shown in Figure 3 , the plate 85 has a flat plate-shaped main body portion 85a, two mounting holes 85b, 85c formed in the main body portion 85a, a first wall portion 85d formed in one side edge portion of the main body portion 85a, a second wall portion 85e formed continuously with one end portion of the first wall portion 85d, a third wall portion 85f formed continuously with the other end portion of the first wall portion 85d, and a fourth wall portion 85g formed in the other side edge portion of the main body portion 85a. The plate 85 is, for example, a stamped member made of metal.

[0048] As shown in Figure 2 , the plate 85 is fastened to the main body portion 81 with the intermediate cover 83 by two bolts 84 using the mounting holes 85b, 85c in such a manner that the first wall portion 85d is located on the fourth gear 54 side and the fourth wall portion 85g is located on the drive sprocket 72 side.

[0049] With the plate 85 fixed to the main body 81, one end of the first wall portion 85d is located above (upper) in the direction of gravity, and the other end is located below (lower) in the direction of gravity. In addition, the first wall portion 85d is formed along the outer periphery of the fourth gear 54.

[0050] Thus, in the power transmission device 10, a first wall portion 85d is provided between the fourth gear 54 and the drive sprocket 72. Therefore, most of the oil that is scattered by the rotation of the fourth gear 54 hits the first wall portion 85d and falls downwards, as shown by the dashed arrow.

[0051] The second wall portion 85e is located above the first wall portion 85d in the direction of gravity while the plate 85 is fixed to the main body portion 81. In addition, the second wall portion 85e is formed in a direction that extends away from the fourth gear 54.

[0052] Therefore, the oil, which is rolled up by the fourth gear 54 and dispersed over the first wall 85d, hits the second wall 85e and falls downward as indicated by the dashed arrow.

[0053] Thus, in the power transmission device 10 of this embodiment, the second wall portion 85e can block oil that scatters beyond the first wall portion 85d. Therefore, it is possible to prevent oil picked up by the fourth gear 54 from scattering and being agitated on the drive sprocket 72 side.

[0054] In this embodiment, the second wall portion 85e is formed to extend in a direction away from the fourth gear 54. Therefore, compared to the case where the second wall portion 85e does not extend in a direction away from the fourth gear 54, the second wall portion 85e blocks a larger area relative to the direction in which oil is splashed by the fourth gear 54. Therefore, in this embodiment, it is possible to effectively suppress the oil splashed by the fourth gear 54 from splashing onto the drive sprocket 72 side.

[0055] In addition, such as Figure 2 As shown, the second wall portion 85e is close to the lower end of the flange surface 81a in the main body portion 81, and the main body portion 81 and the second wall portion 85e form a labyrinth structure.

[0056] Therefore, even with a gap between the main body 81 and the second wall 85e, oil is unlikely to pass through the space between them. Thus, dimensional deviations and assembly errors of the plate 85 can be absorbed, while simultaneously preventing oil from passing through the space between the main body 81 and the second wall 85e.

[0057] With the plate 85 fixed to the main body 81, the third wall portion 85f is located below the first wall portion 85d in the direction of gravity. Furthermore, the third wall portion 85f is formed to extend in a direction approaching the fourth gear 54.

[0058] Oil adhering to the first wall portion 85d and the second wall portion 85e is guided by the third wall portion 85f to fall toward the fourth gear 54 side as shown by the broken line arrow. Thus, it is possible to prevent oil that is wound up by the fourth gear 54 from clinging to the chain 76.

[0059] The fourth wall portion 85g is positioned on the upper side (upper portion) in the direction of gravity on the one end portion side and on the lower side (lower portion) in the direction of gravity on the other end portion side in a state in which the plate 85 is fixed to the main body portion 81. That is, the power transmission device 10 is provided with the first wall portion 85d provided on the fourth gear 54 side of the plate 85 and the fourth wall portion 85g provided on the drive sprocket 72 side of the plate 85.

[0060] The plate 85 is fixed to the main body portion 81 using the two mounting holes 85b, 85c, and the portion on the third wall portion 85f side than the mounting hole 85c is not fixed. Thus, the plate 85 of the present embodiment increases the rigidity of the portion on the third wall portion 85f side than the mounting hole 85c by providing the fourth wall portion 85g opposite to the first wall portion 85d from the vicinity of the mounting hole 85c to the vicinity of the third wall portion 85f. That is, by providing the fourth wall portion 85g to the plate 85, it is possible to suppress the vibration of the plate 85 and to improve the durability.

[0061] In addition, in the present embodiment, the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f are provided on the plate 85, but for example, the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f can be provided integrally with the intermediate cover 83, the main body portion 81, or the cover 82. In addition, the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f can be provided as separate members in advance and mounted on the plate 85, the intermediate cover 83, or the like.

[0062] In the case in which the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f are provided to the plate 85, the manufacturing of the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f and the assembly to the power transmission device 10 become easy.

[0063] The main effects of the power transmission device 10 configured as described above are summarized and described.

[0064] (1) The power transmission device 10 is provided with: a housing 80 that forms an oil bath that stores oil; a fourth gear 54 that is disposed inside the housing 80 and at least a portion of which is immersed in the oil in the oil bath; a drive sprocket 72 that is disposed inside the housing 80 and provided on the radially outer side of the fourth gear 54; a first wall portion 85d that is provided between the fourth gear 54 and the drive sprocket 72; and a second wall portion 85e that is provided on the upper side in the direction of gravity of the first wall portion 85d and extends in a direction away from the fourth gear 54.

[0065] Thus, the oil that is thrown by the fourth gear 54 in excess of the first wall portion 85d can be shielded by the second wall portion 85e. Therefore, the oil thrown by the fourth gear 54 toward the drive sprocket 72 can be suppressed from being stirred.

[0066] (2) The power transmission device 10 includes a third wall portion 85f that is provided on the lower side in the direction of gravity of the first wall portion 85d and extends toward the fourth gear 54.

[0067] Thus, the oil adhering to the first wall portion 85d and the second wall portion 85e is guided by the third wall portion 85f to fall toward the fourth gear 54. Therefore, the oil thrown by the fourth gear 54 can be prevented from being caught on the chain 76.

[0068] (3) (4) The power transmission device 10 includes a plate 85, and the first wall portion 85d is provided to the plate 85.

[0069] Thus, the first wall portion 85d can be easily manufactured and assembled to the power transmission device 10.

[0070] (5) The second wall portion 85e is provided to the plate 85.

[0071] Thus, the second wall portion 85e can be easily manufactured and assembled to the power transmission device 10.

[0072] (6) The third wall portion 85f is provided to the plate 85.

[0073] Thus, the third wall portion 85f can be easily manufactured and assembled to the power transmission device 10.

[0074] (7) The power transmission device 10 includes a fourth wall portion 85g that is provided to the plate 85 on the side of the drive sprocket 72, and the first wall portion 85d is provided to the plate 85 on the side of the fourth gear 54.

[0075] Thus, the rigidity of the third wall portion 85f side of the plate 85 is increased. Therefore, the vibration of the plate 85 can be suppressed, and the durability can be improved.

[0076] The above describes the embodiments of the present application, but the above-described embodiments merely show one of the application examples of the present application, and are not intended to limit the technical scope of the present application to the specific structures of the above-described embodiments.

[0077] For example, in the above-described embodiments, the device is described as the power transmission device 10. However, the device can be, for example, a power transmission device or the like. The power transmission device is a device that contributes to the transmission of power, and is, for example, a device that has a transmission, a reduction gear, or the like.

[0078] Further, in the above-described embodiment, the case where the power transmitting apparatus 10 is provided with the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f is described. However, the power transmitting apparatus 10 can not be provided with the third wall portion 85f.

[0079] Further, in the above-described embodiment, the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f provided by the plate 85 are continuous. However, the first wall portion 85d, the second wall portion 85e, and the third wall portion 85f can be independent respectively.

[0080] Further, in the above-described embodiment, the second wall portion 85e is close to the lower end portion of the flange surface 81a in the main body portion 81, and the labyrinth structure is formed by the main body portion 81 and the second wall portion 85e. However, the labyrinth structure can not be formed by the main body portion 81 and the second wall portion 85e. That is, the second wall portion 85e can not be close to the main body portion 81.

[0081] Symbol Explanation

[0082] 10 Power transmitting apparatus (apparatus)

[0083] 54 Fourth gear (first rotary body)

[0084] 72 Drive sprocket (second rotary body)

[0085] 80 Housing

[0086] 85 Plate

[0087] 85d First wall portion

[0088] 85e Second wall portion

[0089] 85f Third wall portion

[0090] 85g Fourth wall portion

Claims

1. A power transmitting apparatus, comprising: a housing that forms an oil bath that stores oil; a first rotary body that is disposed in the housing and at least a portion of which is immersed in the oil in the oil bath; a second rotary body that is disposed in the housing at a position that is not immersed in the oil in the oil bath and is disposed radially outward of the first rotary body; a plate; a first wall portion that is disposed on the plate between the first rotary body and the second rotary body; a second wall portion that is disposed on a gravity direction upper side of the first wall portion and extends toward a direction away from the first rotary body; a fourth wall portion that is disposed on the plate extending in an up-down direction between the first rotary body and the second rotary body, the first wall portion is disposed on a first rotary body side of the plate, and the fourth wall portion is disposed on a second rotary body side of the plate.

2. The power transmitting apparatus according to claim 1, wherein a third wall portion that is disposed on a gravity direction lower side of the first wall portion and extends toward a direction close to the first rotary body is provided.

3. The power transmitting apparatus according to claim 1 or 2, wherein the second wall portion is disposed on the plate.

4. The power transmitting apparatus according to claim 2, wherein the third wall portion is disposed on the plate. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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