JP6988719B2 - Vehicle power transmission device - Google Patents

Description

The present invention relates to a vehicle power transmission device, and more particularly to an oil pipe provided in the vehicle power transmission device.

A power transmission member for transmitting power from a driving force source to a drive wheel, an oil pump that is rotationally driven by the rotation of the power transmission member and supplies oil to a site requiring lubrication via an oil pipe, and the power transmission. A vehicle power transmission device having a member and a case for accommodating the oil pump is known. For example, the vehicle power transmission device described in Patent Document 1 is that. The vehicle power transmission device described in Patent Document 1 is provided with an oil pipe for guiding the oil to the lubrication-requiring part, so that the oil can be appropriately guided to the lubrication-requiring part. It is possible to suppress wear of parts and improve durability.

Japanese Unexamined Patent Publication No. 2015-09439

By the way, the oil pipe provided in the power transmission device of the vehicle is molded of resin, for example, in order to reduce the weight. In such a case, if the natural frequency of the oil pipe matches, for example, the frequency generated by an engine or an electric motor which is a driving force source, the oil pipe may be damaged by resonance. On the other hand, in order to avoid damage to the oil pipe due to the above resonance, for example, the shape of the oil pipe is changed, the material is changed from resin to metal, or the number of fastening points between the oil pipe and the oil support member is increased. A solution by change is conceivable. However, in the above solution, there is a possibility that the shape of the oil pipe becomes complicated and the mass of the oil pipe or the power transmission device increases.

The present invention has been made in the background of the above circumstances, and an object of the present invention is to provide a power transmission device for a vehicle equipped with an oil pipe having a simple shape and suppressing a decrease in rigidity. It is in.

The gist of the present invention is that the power transmission member for transmitting the power from the driving force source to the drive wheel and the power transmission member are rotationally driven by the rotation of the power transmission member to supply oil to the lubrication required portion via the oil pipe. A vehicle power transmission device having an oil pump, the power transmission member, and a case for accommodating the oil pump. (A) The lubrication-requiring part is a first part and an upper side of the vehicle above the first part. (B) The oil pipe extends from the lower side of the vehicle to the upper side of the vehicle of the first part, and with respect to the first part in a direction orthogonal to the vertical direction of the vehicle. Between the first passage located on the opposite side of the pipe support member provided in the case and the pipe support member and the second portion along the pipe support member, the vehicle lower side of the second portion. A second passage, which is located above the vehicle in the second portion and has a second discharge port for discharging oil toward the second portion, and an upper portion of the vehicle in the first passage. A third unit that communicates the side end portion with the vehicle lower end portion of the second passage, is located above the vehicle in the first portion, and is provided with a first discharge port for discharging oil toward the first portion. Including a passage, (c) the oil pipe is such that the second passage is attached to the pipe support member.

According to the vehicle power transmission device of the present invention, the lubrication required portion includes a first portion and a second portion located above the first portion of the vehicle. Further, the oil pipe extends from the lower side of the vehicle to the upper side of the vehicle of the first portion, and also has a pipe support member provided in the case with respect to the first portion in a direction orthogonal to the vertical direction of the vehicle. Includes a first passage located on the opposite side. Further, the oil pipe extends between the pipe support member and the second portion along the pipe support member from the vehicle lower side to the vehicle upper side of the second portion, and the second portion. It is located above the vehicle and includes a second passage provided with a second discharge port for discharging oil toward the second portion. Further, the oil pipe communicates the vehicle upper end of the first passage with the vehicle lower end of the second passage, and is located above the vehicle of the first portion and is located at the first portion. Includes a third passage with a first outlet for discharging oil towards. Further, in the oil pipe, the second passage is attached to the pipe support member. As a result, the oil pipe has a complicated shape because the second passage is attached to the pipe support member, so that a decrease in rigidity can be suppressed, and the first discharge port is formed in the third passage. It is possible to suppress the change.

It is a skeleton figure which developed and showed the power transmission device of the vehicle to which this invention is applied. FIG. 3 is a schematic perspective view showing an enlarged part of a main part of a structure of an oil pipe provided in the power transmission device of FIG. 1 and its surroundings. It is a schematic diagram which shows the positional relationship of the pipe of FIG. 2 and the structure around it.

The present invention is for various vehicles such as an engine-driven vehicle, a hybrid vehicle having a driving electric motor in addition to the engine as a driving force source for traveling, and an electric vehicle having only an electric motor as a driving force source. Can be applied to power transmission devices. The power transmission device may be a horizontal transaxle such as an FF (front engine / front drive) in which a plurality of axes are arranged along the vehicle width direction, or an FR (front engine / rear drive) type or 4 It may be a wheel drive type power transmission device.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following examples, the drawings are appropriately simplified or modified, and the dimensional ratios and shapes of each part are not always drawn accurately.

FIG. 1 is a skeleton diagram illustrating a transaxle of a vehicle 10 to which the present invention is applied, that is, a power transmission device 12, in which a plurality of axes constituting the power transmission mechanism 16 of the power transmission device 12 are in a common plane. It is a development view which was expanded and shown so that it may be located in. The power transmission device 12 transmits the output of the engine 20, which is a driving force source, to the left and right drive wheels 38, and the FF vehicle in which a plurality of axes of the gear-type power transmission mechanism 16 are arranged along the vehicle width direction. The power transmission mechanism 16 is housed in the case 14. The engine 20 is an internal combustion engine such as a gasoline engine or a diesel engine that generates power by burning fuel. The case 14 is composed of a plurality of members as needed.

The power transmission mechanism 16 is provided with an input shaft 22 connected to the engine 20 which is a driving force source, and a single pinion type planetary gear device 24 and a first motor generator MG1 are arranged concentrically with the input shaft 22. .. The planetary gear device 24 and the first motor generator MG1 function as an electric differential unit 26. The input shaft 22 is connected to the carrier 24c of the planetary gear device 24 which is a differential mechanism, and the first motor generator is connected to the sun gear 24s. The MG1 is connected, and the ring gear 24r is provided with an engine output gear Ge. The carrier 24c is a first rotating element, the sun gear 24s is a second rotating element, the ring gear 24r is a third rotating element, and the first motor generator MG1 corresponds to a rotary control machine for differential control. The first motor generator MG1 is selectively used as an electric motor and a generator, and the rotation speed of the engine 20 is continuously controlled by continuously controlling the rotation speed of the sun gear 24s by regenerative control or the like functioning as a generator. Is continuously changed and output from the engine output gear Ge. Further, when the torque of the first motor generator MG1 is set to 0 and the sun gear 24s is idled, the power transmission between the engine 20 and the power transmission mechanism 16 is cut off, and the engine 20 is prevented from rotating.

A reduction gear device 30 provided with a reduction gear Gr1 and a reduction gear Gr2 is arranged at both ends of the shaft 28, and the reduction gear Gr1 is meshed with the engine output gear Ge. Further, the reduction gear Gr1 is meshed with the motor output gear Gm of the second motor generator MG2. The second motor generator MG2 is selectively used as an electric motor or a generator, and is used as a driving force source for traveling of the vehicle 10 by power running control so as to function as an electric motor, for example. The second motor generator MG2 corresponds to a traveling rotary machine.

The reduction gear Gr2 is meshed with the differential gear Gd of the differential device 32, and the driving force from the engine 20 and the second motor generator MG2 is distributed to the left and right drive shafts 36 via the differential device 32, and the left and right drive shafts 36 are distributed. It is transmitted to the drive wheel 38. The differential device 32 corresponds to an output unit, and the differential ring gear Gd corresponds to a power transmission member for transmitting power from the engine 20 to the drive wheels 38. Further, the gear mechanism is configured by the engine output gear Ge, the reduction gear Gr1, the reduction gear Gr2, the differential ring gear Gd, and the like. At least a part of the differential device 32 is immersed in oil in an oil storage unit (not shown) provided at the bottom of the case 14, and the oil in the oil storage unit is scraped up as the differential device 32 rotates.

The power transmission device 12 of the vehicle 10 of this embodiment includes a first oil pump P1 and a second oil pump P2 as hydraulic pressure sources for a lubrication device (not shown). The first oil pump P1 and the second oil pump P2 are connected to different independent supply oil passages so as to share and lubricate or cool each part of the power transmission mechanism 16. As shown in FIG. 1, the first oil pump P1 is a mechanical oil pump that is mechanically rotationally driven via a driven gear Gp described later that is meshed with a defling gear Gd, and is a second oil pump P2. Is a mechanical oil pump that is connected to the input shaft 22 and mechanically rotationally driven by the engine 20. The first oil pump P1 can also be rotationally driven by engaging the driven gear Gp with a reduction gear Gr1 or a reduction gear Gr2 that rotates in conjunction with the differential ring gear Gd. The second oil pump P2 is an oil pump that is rotationally driven by the engine 20. The first oil pump P1 and the second oil pump P2 are housed in the case 14. The first oil pump P1 sucks up the oil stored in, for example, an oil storage portion (not shown) formed at the bottom of the case 14.

FIG. 2 is a schematic perspective view showing an enlarged part of a main part of the structure of the oil pipe 50 provided in the power transmission device 12 of FIG. 1 and its surroundings. FIG. 3 is a schematic view showing the positional relationship between the oil pipe 50 of FIG. 2 and the structure around the oil pipe 50. The oil pipe 50 is an oil supply path for guiding the oil sucked up from the oil storage portion (not shown) in the case 14 to the lubrication required portion in the case 14 by driving the first oil pump P1. The parts requiring lubrication are, for example, the bearings, gears, and rotating shafts of each part of the power transmission device 12, and are the sliding contact parts between the bearing and the rotating shaft, and the meshing point or meshing point of the gear on the upstream side in the rotation direction of the gear. It is the part just before the meshing point of. Specifically, the site requiring lubrication is the first site including the meshing point between the differential ring gear Gd of the differential device 32 and the reduction gear Gr2 or the site immediately before the meshing point on the upstream side of the differential ring gear Gd in the rotation direction. 52 and a second portion 54 including a portion immediately before the meshing point between the motor output gear Gm of the second motor generator MG2 and the reduction gear Gr1 or the engagement point on the rotation direction upstream side of the reduction gear Gr1 from the meshing point. I'm out. In this embodiment, the oil pipe 50 is formed so as to be able to guide the oil to the first portion 52 and the second portion 54 of the lubrication required portion. As shown in FIGS. 2 and 3, the second portion 54 is located on the upper side of the vehicle with respect to the first portion 52. The first portion 52 is a portion immediately before the meshing point between the differential ring gear Gd and the reduction gear Gr2 or the engagement point on the upstream side in the rotation direction of the differential ring gear Gd. For example, the differential ring gear Gd and the reduction gear Gr2. It may be a portion immediately before the meshing point on the rotation direction upstream side of the reduction gear Gr2 with respect to the meshing point or the meshing point. Further, the second portion 54 is a portion immediately before the meshing point between the motor output gear Gm of the second motor generator MG2 and the reduction gear Gr1 or the meshing point on the upstream side of the reduction gear Gr1 in the rotation direction. For example, it may be a portion immediately before the meshing point of the motor output gear Gm and the reduction gear Gr1 or the meshing point on the upstream side of the motor output gear Gm in the rotation direction.

As shown in FIGS. 2 and 3, the oil pipe 50 is formed in a longitudinal shape from the vehicle lower side to the vehicle upper side of the vehicle 10. The oil pipe 50 is, for example, a hollow pipe made of resin. The oil pipe 50 is formed, for example, with a circular, elliptical or polygonal distribution cross section. The oil pipe 50 has a first passage 50a and a second passage 50b extending from the lower side of the vehicle toward the upper side of the vehicle, and a third passage communicating the upper end of the first passage 50a and the lower end of the second passage 50b. It has 50c. The oil pipe 50 is fixed to the plate-shaped pipe support member 56 provided in the case 14 by fastening the second passage 50b with a fastening bolt 58. The pipe support member 56 may be, for example, the wall surface of the case 14 having a wall thickness in the vehicle width direction.

The first passage 50a of the oil pipe 50 is a combination of two injection-molded resin plate materials each having a concave groove so that the concave side of the concave groove is on the inside and is fixed to each other. It has a flat plate shape whose width dimension is larger than the thickness dimension, and has rigidity higher in the width direction than in the thickness direction. As shown in FIGS. 2 and 3, the first passage 50a is formed so as to extend from the front side of the vehicle to the rear side of the vehicle and to extend from the lower side of the vehicle to the upper side of the vehicle while curving. The vehicle lower end portion 50d of the first passage 50a is communicated with the first oil pump P1. The first passage 50a is arranged so as to be located on the side opposite to the pipe support member 56 with respect to the first portion 52 in the vehicle width direction shown in FIGS. 2 and 3, which is a direction orthogonal to the vehicle vertical direction. There is. That is, the first passage 50a is arranged so that the distance from the pipe support member 56 to the first passage 50a is longer than the distance from the pipe support member 56 to the first portion 52 in the vehicle width direction. There is.

Similar to the first passage 50a, the second passage 50b of the oil pipe 50 is in a state where two injection-molded resin plate materials each having a concave groove are combined so that the concave side of the concave groove is on the inside. They are mutually fixed, have a flat plate shape having a width dimension larger than the thickness dimension, and have a rigidity higher in the width direction than in the thickness direction. As shown in FIGS. 2 and 3, the second passage 50b is formed so as to go from the rear side of the vehicle to the front side of the vehicle and to be curved in an arc shape and extend from the lower side of the vehicle to the upper side of the vehicle. There is. The second passage 50b is formed so as to extend between the pipe support member 56 and the second portion 54 along the pipe support member 56. Further, in the second passage 50b, a plurality of plate-shaped mounting portions 60 projecting from the outer peripheral edge of the second passage 50b toward the outer periphery are integrally formed. The mounting portion 60 is formed with an insertion hole through which the fastening bolt 58 can be inserted, and in the oil pipe 50, the mounting portion 60 and the pipe support member 56 are fixed along the pipe support member 56 by the fastening bolt 58. There is.

The second passage 50b is provided with a longitudinal nozzle portion 68 that communicates with the vehicle upper end portion 50g and has a second discharge port 66 for supplying oil to the second portion 54. The nozzle portion 68 is formed so as to extend in the vehicle width direction. The nozzle portion 68 is arranged so as to be located above the vehicle of the second portion 54. Therefore, the oil sucked up by the first oil pump P1 is discharged downward from the second discharge port 66 formed in the nozzle portion 68 toward the second portion 54. The oil supplied from the second discharge port 66 to the second portion 54 is discharged from, for example, the second discharge port 66 by injection, or from the second discharge port 66 by dropping by its own weight. Here, in the schematic view showing the positional relationship between the oil pipe 50 and the structure around it in FIG. 3, only one nozzle portion 68 provided in the second passage 50b is shown, but the nozzle portion 68 is the second passage. The number is not limited to one in 50b, and a plurality of them may be provided.

The third passage 50c of the oil pipe 50 is a cylindrical component made of resin, and as shown in FIGS. 2 and 3, the vehicle upper end portion 50e of the first passage 50a and the vehicle lower side of the second passage 50b. It is connected so as to communicate with the end portion 50f. The third passage 50c is arranged so as to be located above the vehicle of the first portion 52, and is formed in a longitudinal shape so as to extend in the vehicle width direction. The third passage 50c has a first discharge port 70 for supplying oil to the first portion 52. The oil sucked up by the first oil pump P1 is discharged downward from the first discharge port 70 formed in the third passage 50c toward the first portion 52b. The oil supplied from the first discharge port 70 to the first portion 52 is discharged from, for example, the first discharge port 70 by injection, or from the first discharge port 70 by dropping by its own weight.

The oil sucked up from the lower side of the vehicle to the upper side of the vehicle by the first oil pump P1 and circulates inside the oil pipe 50 is shown in the direction from the first passage 50a to the second passage 50b in the third passage 50c, that is, FIG. It flows in the direction of arrow A. Further, the oil flowing inside the oil pipe 50 is directed from the vehicle upper end 50g of the second passage 50b to the second portion 54 in the nozzle portion 68 of the second passage 50b, that is, in the direction of arrow B shown in FIG. It flows. That is, in the oil pipe 50 of the present embodiment, the flow direction A of the oil flowing to the first discharge port 70 is formed so as to face the flow direction B of the oil flowing to the second discharge port 66. On the other hand, in the oil pipe 50 in which the flow direction A of the oil flowing to the first discharge port 70 and the flow direction B of the oil flowing to the second discharge port 66 are the same, for example, in the first passage 50a or the second passage 50. It is necessary to provide a longitudinal nozzle portion having the first discharge port 70 and projecting in the vehicle width direction to branch the oil flow path. The distribution route refers to an oil distribution route guided by the oil pipe 50. Therefore, the oil pipe 50 of this embodiment does not need to be provided with the nozzle portion for branching the oil flow path, so that the shape can be simplified. Further, in the oil pipe 50 of the present embodiment, since the first discharge port 70 is provided in the third passage 50c, for example, the oil flowing to the first discharge port 70 in the flow direction A and the oil flowing to the second discharge port 66. The shape can be simplified as compared with the case where the nozzle portion facing the distribution direction B of the above is provided separately from the third passage 50c.

Further, in the oil pipe 50, the second passage 50b is above the vehicle above the first passage 50a, that is, the oil flow path from the first oil pump P1 is the oil flow from the first oil pump P1 to the first passage 50a. It is arranged so that it is longer than the path. That is, in this embodiment, the second passage 50b, in which the oil flow path from the first oil pump P1 is located at a long position, is fixed to the pipe support member 56, so that, for example, the oil flows from the first oil pump P1. Compared with the case where the first passage 50a in which the path is located at a short position is fixed to the pipe support member 56, the rigidity of the oil pipe 50 in the state of being assembled to the pipe support member 56, that is, the support rigidity of the oil pipe 50 is increased. By increasing the support rigidity of the oil pipe 50, for example, the natural frequency of the oil pipe 50 can be increased. Therefore, the oil pipe 50 can be used, for example, for vibration of the vehicle 10, an engine 20 as a driving force source, and a first motor generator MG1. And it is prevented from resonating with the vibration of the second motor generator MG2. Further, the oil pipe 50 of the present embodiment has the motor output gear Gm of the second motor generator MG2 and the pipe support member 56, for example, which is the second portion 54 having a diameter smaller than that of the defling gear Gd, which is the first portion 52. Since the second passage 50b located between the two passages 50b is fixed to the pipe support member 56, the degree of freedom in designing the shape of the oil pipe for approaching the pipe support member 56 is increased. Therefore, the oil pipe 50 can realize a more simplified shape.

According to the power transmission device 12 of the vehicle 10 of the present embodiment, the oil pipe 50 extends from the lower side of the vehicle to the upper side of the vehicle of the first portion 52 and is orthogonal to the vehicle width direction in the vehicle vertical direction. Includes a first passage 50a located on the opposite side of the pipe support member 56 provided in the case 14 with respect to the first portion 52. Further, the oil pipe 50 extends between the pipe support member 56 and the second portion 54 along the pipe support member 56 from the vehicle lower side to the vehicle upper side of the second portion 54, and the second portion 54. It is located above the vehicle and includes a second passage 50b having a second discharge port 66 that discharges oil toward the second portion 54. Further, the oil pipe 50 communicates the vehicle upper end portion 50e of the first passage 50a with the vehicle lower end portion 50f of the second passage 50b, and is located above the vehicle of the first portion 52, and is the first portion. It includes a third passage 50c provided with a first discharge port 70 for discharging oil toward 52. Further, in the oil pipe 50, the second passage 50b is attached to the pipe support member 56. As a result, the oil pipe 50 has a complicated shape because the second passage 50b is attached to the pipe support member 56 to suppress a decrease in rigidity and the first discharge port 70 is formed in the third passage 50c. It is possible to suppress the change.

Although the preferred embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to this, and the present invention is also carried out in still another embodiment.

For example, in the above-described embodiment, the first portion 52 is a portion immediately before the meshing point of the differential ring gear Gd and the reduction gear Gr2 or the meshing point on the upstream side in the rotation direction of the differential ring gear Gd. Not necessarily limited to this, it may be a portion immediately before the meshing point or the meshing point on the upstream side in the rotation direction of the gear with respect to the meshing point or the meshing point of other gears in each part of the power transmission device 12. Further, the second portion 54 is a portion immediately before the meshing point between the motor output gear Gm of the second motor generator MG2 and the reduction gear Gr1 or the meshing point on the upstream side of the reduction gear Gr1 in the rotation direction. However, the present invention is not limited to this, and may be a portion immediately before the meshing point of the other gears of each part of the power transmission device 12 or the meshing point on the upstream side in the rotation direction of the gear.

Further, in the above-described embodiment, the oil pipe 50 may be provided inside the case 14, or a part of the oil pipe 50 may be provided outside the case 14.

Further, in the above-described embodiment, the third passage 50c of the oil pipe 50 is formed so as to extend in the vehicle width direction, but may be provided, for example, in a substantially horizontal direction so as to incline downward to the vehicle. It may be provided in. Further, the nozzle portion 68 of the oil pipe 50 is formed so as to extend in the vehicle width direction, but may be provided, for example, in a substantially horizontal direction, or may be provided so as to incline downward to the vehicle.

Hereinafter, examples of the present invention have been described in detail with reference to the drawings, but the above is merely an embodiment, and although no other examples are given, the present invention can be described by those skilled in the art to the extent that it does not deviate from the gist thereof. It can be implemented with various changes and improvements based on knowledge.

10: Vehicle 12: Power transmission device 14: Case 20: Engine (driving force source)
38: Drive wheel 50: Oil pipe 50a: First passage 50b: Second passage 50c: Third passage 50e: Vehicle upper end 50f of first passage 50a: Vehicle lower end 52 of second passage 50b: First 1 part 54: 2nd part 56: Pipe support member 66: 2nd discharge port 70: 1st discharge port P1: 1st oil pump (oil pump)
Gd: Differential ring gear (power transmission member)
MG1: First motor generator (driving force source)
MG2: 2nd motor generator (driving force source)

Claims (1)

A power transmission member for transmitting power from a driving force source to a drive wheel, an oil pump that is rotationally driven by the rotation of the power transmission member and supplies oil to a site requiring lubrication via an oil pipe, and the power transmission. A vehicle power transmission device comprising a member and a case for accommodating the oil pump.
The lubrication required portion includes a first portion and a second portion located above the first portion of the vehicle.
The oil pipe extends from the lower side of the vehicle to the upper side of the vehicle of the first portion, and is opposite to the pipe support member provided in the case with respect to the first portion in a direction orthogonal to the vehicle vertical direction. The second passage extending from the lower side of the vehicle to the upper side of the vehicle along the pipe support member between the first passage located on the side and the pipe support member and the second portion, and the second portion. A second passage located above the vehicle of the portion and having a second discharge port for discharging oil toward the second portion, a vehicle upper end of the first passage, and a vehicle lower end of the second passage. A third passage, which is located above the vehicle of the first portion and has a first discharge port for discharging oil toward the first portion, is included.
The oil pipe is a power transmission device for a vehicle, wherein the second passage is attached to the pipe support member.

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