阅读说明：本技术 车辆用动力传递装置的润滑结构 (Lubricating structure for vehicle power transmission device ) 是由 浦部英一郎 于 2021-03-24 设计创作，主要内容包括：本发明提供一种车辆用动力传递装置的润滑结构,使用现存的零件便可在壳体内廉价地形成油贮存部而不需要新的零件。一种车辆用动力传递装置的润滑结构,在壳体(1)的内部收容有：油贮存部(S1),贮存油；多个齿轮(G1～G7)；以及液压控制部(6、7),形成有由分隔板(6B、7B)分隔而成的油路,从而将由一部分浸渍于壳体(1)的底部所贮存的油中的第一齿轮(G4)搅起的油的一部分贮存于油贮存部(S1)中,其中,油贮存部(S1)由壳体(1)的一部分(6a、6b)以及分隔板(6B)划分而成。(The invention provides a lubrication structure of a power transmission device for a vehicle, which can form an oil storage part in a shell at low cost by using existing parts without new parts. A lubrication structure for a vehicle power transmission device, wherein: an oil storage unit (S1) that stores oil; a plurality of gears (G1-G7); and hydraulic control units (6, 7) that form oil passages partitioned by partition plates (6B, 7B) and store part of the oil stirred by the first gear (G4) that is partially immersed in the oil stored at the bottom of the casing (1) in an oil storage unit (S1), wherein the oil storage unit (S1) is partitioned by the partition plates (6B) and the parts (6a, 6B) of the casing (1).)

1. A lubrication structure of a power transmission device for a vehicle, characterized in that:

the inside of the casing accommodates:

an oil storage unit for storing oil;

a plurality of gears; and

a hydraulic control part, which is formed with an oil path divided by a partition component,

thereby storing a part of the oil stirred up by the first gear partially immersed in the oil stored in the bottom of the casing in the oil storage portion,

wherein the oil reservoir is partitioned by a part of the housing and the partition member.

2. The lubrication structure of a vehicular power transmitting apparatus according to claim 1, wherein the hydraulic control portion includes:

a first control oil passage portion formed integrally with the housing;

a second control oil passage portion fixed to the first control oil passage portion; and

the partition member is sandwiched between the first control oil passage portion and the second control oil passage portion,

wherein a portion of the housing forming the oil reservoir is a rib surrounding at least a portion of the oil reservoir,

the partition member is extended from between the first control oil passage portion and the second control oil passage portion to a position facing the rib.

3. The lubrication structure of a vehicular power transmitting apparatus according to claim 2,

a second gear engaged with the first gear is arranged above a first shaft supporting the first gear, and

the oil reservoir is disposed above a second shaft that supports the second gear,

the oil reservoir portion is formed with: an opening portion that opens in at least one of the vehicle width direction and the upper side of the oil reservoir portion.

4. The lubrication structure of a vehicular power transmitting apparatus according to claim 3, characterized by further comprising:

another oil reservoir partitioned by another part of the casing and the partition member; and

a third gear engaged with a fourth gear supported by the second shaft,

wherein the other oil reservoir is disposed below the third gear supported by the third shaft,

the other oil reservoir portion is formed with: has an opening opened upward.

5. The lubrication structure of a vehicular power transmitting apparatus according to claim 4,

the hydraulic control portion and the partition member are formed so as to surround a part of the outer periphery of the third gear.

6. The lubrication structure of a vehicular power transmitting apparatus according to claim 5,

the hydraulic control unit is divided into a plurality of sections above and below the third gear.

7. The lubrication structure of a vehicular power transmitting apparatus according to claim 5 or 6,

the hydraulic control unit and the partition member are formed so as to surround a part of an outer periphery of the third gear on the opposite side to the second gear.

Technical Field

The present invention relates to a lubrication structure of a power transmission device for a vehicle, which lubricates various parts in a housing of the power transmission device.

Background

In a vehicle power transmission device that transmits the driving force of a driving source such as an engine or an electric motor to wheels, various rotating members such as gears are housed in a case (case), and as a lubrication method thereof, the following method may be adopted: the oil for lubrication stored in the bottom portion of the housing is stirred up by the rotation of the rotating member, and the stirred oil lubricates various portions of the housing. In this manner, a part of the rotating member is immersed in the oil stored in the bottom portion of the housing. Therefore, if the amount of oil in the casing becomes excessive, the pulling resistance (stirring resistance) due to the viscosity of the oil when the oil is stirred up by the rotating member becomes large, which becomes one cause of the large power loss of the drive source.

Therefore, patent document 1 proposes a lubricating oil supply structure in which an oil tank (oil catch tank) is provided in a housing, and oil stirred up by a rotating member (differential ring gear) is stored in the oil tank, whereby the amount of oil stored in the bottom portion in the housing is reduced (the oil level is lowered), and the pulling resistance of the oil by the rotating member is suppressed to be small.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open No. 2014-111958

Disclosure of Invention

[ problems to be solved by the invention ]

However, the lubricating oil supply structure proposed in patent document 1 employs the following structure: recesses are respectively formed by ribs on joint surfaces of two parts (housing and casing) of the casing joined to each other, and the oil sump is formed by joining the two parts. Or the following structure is adopted: the oil sump is formed by covering a recess formed on a joint surface of one of the components (the cover or the casing) with a plate. Therefore, there is a problem as described below.

That is, in order to form the oil collection tank, it is necessary to form recesses in the two parts of the housing (both the cover and the housing) by ribs, and therefore, there is a problem that the number of processing steps of the housing increases, which leads to an increase in cost. Further, when the oil sump is formed by covering a recess formed in one of the components (the cover body or the housing) with a plate, a new plate is required, and the plate needs to be attached with a bolt or the like, which increases the number of components and the number of assembly steps, resulting in a problem of increased cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a lubrication structure of a vehicle power transmission device, which can form an oil reservoir in a housing at low cost using existing components without requiring new components.

[ means for solving problems ]

In order to achieve the above object, the present invention provides a lubrication structure of a vehicle power transmission device, in which: an oil reservoir S1 for storing oil; a plurality of gears G1-G7; and hydraulic control units 6 and 7 each including an oil passage partitioned by partition members 6B and 7B, and configured to store a part of oil stirred by a first gear G4 partially immersed in the oil stored in the bottom portion of the casing 1 in the oil reservoir S1, wherein the oil reservoir S1 is partitioned by the partition member 6B and the portions 6a and 6B of the casing 1.

According to the present invention, since the oil reservoir is partitioned by the part of the housing and the partition member of the hydraulic control unit, and the oil reservoir is formed using the existing partition member used in the hydraulic control unit, the oil reservoir can be formed inexpensively in the housing using the existing parts without requiring new parts. Further, since a part of the oil stirred up by the first gear is stored in the oil storage portion, the amount of the oil stored in the bottom portion of the housing is reduced (the oil level is lowered), the pulling resistance (stirring resistance) when the one gear stirs the oil is suppressed to be small, and the power loss of the drive source is also suppressed to be low.

Here, the hydraulic control portions 6, 7 may include: first control oil path portions 6A and 7A formed integrally with the casing 1; a second control oil passage portion 6C fixed to the first control oil passage portions 6A and 7A; and the partition members 6B, 7B interposed between the first control oil passage portion 6A and the second control oil passage portion 6C, wherein a part of the casing 1 forming the oil reservoir S1 may be ribs 6A, 6B surrounding at least a part of the oil reservoir S1, and the partition member 6B may extend from between the first control oil passage portion 6A and the second control oil passage portion 6C to a position facing the ribs 6A, 6B.

According to the above configuration, since the heat efficiency of the oil is favorably transferred to the control oil passage portion having a large heat capacity, the oil is cooled, and the temperature rise thereof is suppressed to be low.

The second gear G3 meshing with the first gear G4 may be disposed above the first shaft 5 supporting the first gear G4, the oil sump S1 may be disposed above the second shaft 3 supporting the second gear G3, and the oil sump S1 may have an opening portion S11 opening upward or in at least one of the vehicle width direction and the vehicle width direction.

According to the above configuration, since the opening portion that opens in at least one of the upward direction and the vehicle width direction is formed in the oil reservoir portion, the oil overflows from the oil reservoir portion and is supplied to the portion that needs to be lubricated when the vehicle turns. In addition, the oil is stored in the oil storage portion in a state other than the turning of the vehicle.

The method can also comprise the following steps: another oil reservoir S2 partitioned by another portion of the casing 1 and the partition member 7B; and a third gear G5 that meshes with the fourth gear G6 supported by the second shaft 3, wherein the second oil reservoir S2 may be disposed below the third gear G5 supported by the third shaft 4, and an opening S21 that opens upward may be formed in the second oil reservoir S2.

According to the above configuration, by providing another oil reservoir below the third gear as well, the total amount of oil stored increases, and the amount of oil in the bottom portion of the housing decreases (the oil level decreases). Therefore, the pulling resistance (stirring resistance) of the oil by the first gear is suppressed to be low. Further, when an excessive amount of oil is stored in the other oil reservoir, the oil stirred up by the third gear can be supplied to the other oil reservoir upward, and therefore, adjustment can be made so as not to cause an excessive amount or a shortage of the amount of oil stored between the two oil reservoirs.

In addition, the hydraulic control portion 6 and the partition member 6B may be formed to surround a part of the outer circumference of the third gear G5. In addition, in this case, the hydraulic control portion 6 and the partition member 6B may be formed to surround a part of the outer circumference of the third gear G5 on the opposite side of the second gear G3.

According to the above configuration, since the oil flowing from the second gear side can be guided by the hydraulic control unit to fall to the other oil reservoir, the amount of oil stored between the oil reservoirs can be adjusted without excess or deficiency by effectively using existing parts, and no new parts are required.

The hydraulic control units 6 and 7 may be divided into a plurality of sections above and below the third gear G5.

According to the above configuration, the degree of freedom in setting the position where the oil reservoir is formed is increased, and the plurality of oil reservoirs can be arranged at appropriate positions.

[ Effect of the invention ]

According to the present invention, the following effects can be obtained: in a lubricating structure of a vehicular power transmitting apparatus, an oil reservoir can be formed inexpensively in a housing using existing parts without requiring new parts.

Drawings

Fig. 1 is a side view showing an internal structure (a state after removing a partition plate from a hydraulic control unit) of a power transmission device including a lubricating structure of the present invention.

Fig. 2 is a side view showing an internal structure (a state where a partition plate is attached to a hydraulic control unit) of a power transmission device including a lubricating structure of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a cross-sectional view taken along line B-B of fig. 2.

Fig. 5 is a cross-sectional view taken along line C-C of fig. 2.

[ description of symbols ]

1: flywheel casing (casing)

1a, 1 b: rib (part of the shell)

2: motor shaft

3: intermediate shaft (second shaft)

4: engine shaft (third shaft)

5: output shaft (first shaft)

6. 7: hydraulic control unit

6A, 7A: control oil passage part

6B, 7B: separator plate (separating component)

6C, 7C: control oil passage part

6a, 6 b: rib (part of the shell)

G1: driving gear

G2: first intermediate gear

G3: driving gear (second gear)

G4: final driven gear (first gear)

G5: driving gear (third gear)

G6: second intermediate gear

G7: parking gear

S1: the first oil reservoir

S11: opening part of first oil reservoir

S2: second oil reservoir

S21: opening part of the second oil reservoir

S3: third oil reservoir

S31: opening part of the third oil reservoir

Detailed Description

Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

Fig. 1 is a side view showing an internal structure (a state after removing a partition plate from a hydraulic control unit) of a power transmission device including a lubrication structure of the present invention, fig. 2 is a side view showing the internal structure (a state after attaching the partition plate to an upper hydraulic control unit), fig. 3 is a sectional view taken along line a-a of fig. 2, fig. 4 is a sectional view taken along line B-B of fig. 2, and fig. 5 is a sectional view taken along line C-C of fig. 2.

The power transmission device of the present embodiment transmits the driving force from an engine and an Electric motor, which are the driving sources of a hybrid Electric vehicle (hev), to drive wheels, and is configured by joining a flywheel housing 1 to a transmission housing (not shown) and joining and integrating the two by a plurality of bolts (not shown). Fig. 1 and 2 are views of the flywheel housing 1 as viewed from the side of the joint surface with the transmission housing.

As shown in fig. 1, on the transmission case side of the flywheel case 1, from above, a motor shaft (input shaft) 2, an intermediate shaft 3 as a second shaft, an engine shaft (input shaft) 4 as a third shaft, and an output shaft 5 as a first shaft are arranged in parallel with each other in the vehicle width direction (vertical direction to the paper of fig. 1). A drive gear G1 is attached to the motor shaft 2, the drive gear G1 meshes with a first intermediate gear G2 attached to the intermediate shaft 3, and a drive gear G3 attached to the intermediate shaft 3 meshes with a final driven gear (differential ring gear) G4 attached to the output shaft 5.

A drive gear G5 is attached to the engine shaft 4, and the drive gear G5 meshes with a second intermediate gear G6 attached to the intermediate shaft 3. Here, the drive gear G3 of the intermediate shaft 3 meshing with the final driven gear G4 is disposed above the output shaft 5 supporting the final driven gear G4. Further, lubricating oil is stored in the bottom of the flywheel housing 1, and finally a part of the driven gear G4 is immersed in the oil.

A control oil passage portion (control oil passage portion half portion) 6A and a control oil passage portion (control oil passage portion half portion) 7A that constitute a part of the hydraulic control portion 6 and the hydraulic control portion 7 are formed integrally with each other on the wall surface of the flywheel housing 1 at positions above and below the engine shaft 4 and on the sides of the motor shaft 2 and the output shaft 5 (on the left side (vehicle front side) in fig. 1). Here, in the upper hydraulic control portion 6, as shown in fig. 2 to 4, a control oil passage portion (the other control oil passage portion half) 6C is fixed to an oil passage surface 8 of the control oil passage portion 6A on which an oil passage groove 8a is formed by fastening a bolt 6D (see fig. 4), and a partition plate (partition member) 6B is interposed between the control oil passage portion 6A and the control oil passage portion 6C. Thus, a labyrinth-shaped oil passage is formed between the control oil passage portion 6A and the control oil passage portion 6C by the oil passage groove 8a and the hole 9 of the partition plate 6B.

Similarly, in the lower hydraulic control unit 7, a partition plate 7B is interposed between the control oil passage portion 7A and the control oil passage portion 7C, thereby forming a labyrinth-shaped oil passage therein.

As shown in fig. 1, an arc-shaped rib 6A extending along the periphery of the engine shaft 4 and an arc-shaped rib 6B extending along the periphery of the parking gear G7 on the motor shaft 2 are integrally extended from the upper control oil passage portion 6A formed integrally with the flywheel housing 1, and a partition plate 6B of the hydraulic control portion 6 extending to a position facing the ribs 6A, 6B is covered on the ribs 6A, 6B, whereby a first oil reservoir portion S1 is defined in the upper portion of the flywheel housing 1. An opening S11 that opens upward is formed in the first oil reservoir S1.

Here, the drive gear G3 on the counter shaft 3 meshing with the final driven gear G4 is disposed above the output shaft 5 supporting the final driven gear G4, and the first oil reservoir S1 is disposed above the counter shaft 3 supporting the drive gear G3. Further, the first oil reservoir S1 may be formed with an opening, not shown, that opens in the vehicle width direction (the direction perpendicular to the paper surface of fig. 1), and the first oil reservoir S1 may be formed with at least one of the opening S11 that opens upward and the opening, not shown, that opens in the vehicle width direction.

As shown in fig. 1, a second oil reservoir S2 is provided below the engine shaft 4 of the flywheel housing 1 and the drive gear G5 attached to the engine shaft 4, and is defined by a rib 1a formed in a part of the flywheel housing 1 and a partition plate 7B of the hydraulic control unit 7 below. Here, the second oil reservoir S2 has an opening S21 that opens upward. As shown in fig. 2, the upper hydraulic control unit 6 and the partition plate 6B of the hydraulic control unit 6 are formed so as to surround, from the outer peripheral side, the upper portion of the drive gear G5 supported by the engine shaft 4 and a part of the side portion of the drive gear G5 opposite to the drive gear G3.

Further, as shown in fig. 1, a rib 1B having a substantially rectangular frame shape is integrally formed at a vehicle front side (left side in fig. 1) of the engine shaft 4 at a height direction intermediate position of the flywheel housing 1, and a third oil reservoir S3 defined by the rib 1B and a partition plate 6B of the upper hydraulic control unit 6 covered by the rib 1B is provided at this portion. An opening portion S31 that opens toward the rear of the vehicle (to the right in fig. 1) is formed in the upper portion of the third oil reservoir S3.

In the power transmission device including the lubrication structure configured as described above, the oil is stirred up by the rotation of the final driven gear G4, a part of which is immersed in the oil stored in the bottom portion of the flywheel housing 1, and a part of the stirred up oil is supplied to the lubrication of each portion, and the other portions are stored in the first to third oil reservoirs S1 to S3.

In the present embodiment, the first oil reservoir S1 is defined by the ribs 6a and 6B formed integrally with the flywheel housing 1 and the partition 6B covered by the ribs 6a and 6B, and the second oil reservoir S2 is defined by the ribs 1a formed integrally with the flywheel housing 1 and the partition 7B covered by the ribs 1 a. The third oil reservoir S3 is also defined by the rib 1B formed integrally with the flywheel housing 1 and the partition 6B covering the rib 1B.

Therefore, the first to third oil reservoirs S1 to S3 can be formed inexpensively in the flywheel housing 1 using the partition plate 6B of the hydraulic control unit 6 and the partition plate 7B of the hydraulic control unit 7 as existing components without requiring new components. Further, since a part of the oil stirred up by the final driven gear S4 is stored in the first to third oil reservoirs S1 to S3, the amount of oil stored in the bottom portion of the flywheel housing 1 is reduced (the oil level is lowered), the pulling resistance (stirring resistance) when the final driven gear S4 stirs the oil is suppressed to be small, and the power loss of the engine or the electric motor as the drive source is also suppressed to be low.

In the present embodiment, the ribs 1a, 1B, 6A, and 6B are integrally extended from the upper and lower hydraulic pressure control units 6, the control oil passage 6A of the hydraulic pressure control unit 7, and the control oil passage 7A, and the first oil reservoir S1 to the third oil reservoir S3 are formed by the ribs 6A, 6B, 1a, and 1B, and the partition 6B of the hydraulic pressure control unit 6 and the partition 7B of the hydraulic pressure control unit 7 covered by the ribs 6A, 6B, 1a, and 1B, respectively. Therefore, the oil is efficiently cooled, and the temperature rise thereof is suppressed low.

In the present embodiment, the drive gear G3 that meshes with the final driven gear G4 is disposed above the output shaft 5 that supports the final driven gear G4, the first oil reservoir S1 is disposed above the intermediate shaft 3 that supports the drive gear G3, and the opening portion S11 that opens upward is formed in the first oil reservoir S1, and therefore, the following effects can be obtained.

That is, since the opening portion S11 that opens upward is formed in the first oil reservoir S1, oil overflows from the first oil reservoir S1 and is supplied to a portion that needs to be lubricated during the rotation of the vehicle. In a state other than the turning of the vehicle, the oil is stored in the first oil reservoir S1.

In the present embodiment, since the second oil reservoir S2 and the third oil reservoir S3 are provided in the flywheel housing 1, the total amount of oil stored increases, and the amount of oil stored in the bottom portion in the flywheel housing 1 decreases (the oil level decreases). Therefore, the pulling resistance (stirring resistance) of the oil by the final driven gear G4 is suppressed to be low. Further, when an excessive amount of oil is stored in the second oil reservoir S2 or the third oil reservoir S3, the oil stirred up by the drive gear G3 can be supplied to the first oil reservoir S1, and therefore, the amount of oil stored in the first oil reservoir S1 to the third oil reservoir S3 can be adjusted so as not to be excessive or insufficient.

In the present embodiment, since the hydraulic control unit 6 and the partition plate 6B are formed so as to surround a part of the drive gear G5 from the outer peripheral side, the oil that flows from the drive gear G3 side (splashed) can be guided by the hydraulic control unit 6 so as to fall down to the second oil reservoir S2 below. Therefore, the stored amount of oil can be adjusted between the first oil reservoir S1 and the second oil reservoir S2 without excess or deficiency by effectively using existing parts without requiring new parts.

In the present embodiment, since the two hydraulic pressure control units 6 and 7 are provided so as to be divided vertically, the degree of freedom in setting the positions where the first to third oil sumps S1 to S3 are formed is improved, and the plurality of first to third oil sumps S1 to S3 can be arranged at appropriate positions.

In the present embodiment, the oil scattered by the rotation of the parking gear G7 disposed on the motor shaft 2 hits the wall portion above the parking gear G7 (the upper wall of the flywheel housing 1) and drops (drops) downward therefrom. In this way, the oil dripping from the upper wall portion of the parking gear G7 can be stored in the oil reservoir S1.

The present invention has been described above as applied to a lubrication structure of a power transmission device mounted on a hybrid vehicle using both an engine and an electric motor as drive sources, but the present invention is also applicable to a lubrication structure of a power transmission device mounted on a normal vehicle using only an engine as a drive source or an electric vehicle (ev (electric vehicle) using only an electric motor as a drive source.

In addition, the application of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical ideas described in the claims, the specification, and the drawings.