JP2013213515A - Lubricating device of power transmitting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating device of a power transmitting mechanism capable of properly feeding lubricating oil and suppressing the damage of a pipe.SOLUTION: A third pipe part 49 has a bend 49c between a first pipe part side end 49a and a second pipe part side end 49b. A first retainer 73 is formed in an upstream side of the bend 49c and a position corresponding to the third pipe part 49 in an inner wall surface 70 of a second case 11B, and a second retainer 74 is formed in a downstream side of the bend 49c and a position corresponding to the third pipe part 49. An oil hole 49 feeding oil to a shaft is arranged in at least shorter one of a distance L1 between a position corresponding to the first retainer 73 of the third pipe part 49 and the bend 49c and a distance L2 between a position corresponding to the second retainer 74 of the third pipe part 49 and the bend 49c.

Description

  The present invention relates to a lubricating device for a power transmission mechanism that lubricates gears and the like with an oil pump.

  In the lubricating device described in Patent Document 1, lubricating oil supplied from an oil pump is supplied to the forward / reverse switching device via a guide pipe disposed in the transmission case.

  One end of the guide pipe is fixed to the left case that accommodates the forward / reverse switching device, extends from the left case to the right case that accommodates the torque converter, then bends upward, and further from the right case side to the left case side. It is extended.

JP 2000-35109 A

  As described above, there is known a technique in which a pipe is arranged in the transmission case and the lubricating oil supplied from the oil pump reaches a portion to be supplied through the pipe. When the oil pump is operated and the hydraulic pressure rises, the guide pipe may swing, and there is a possibility that the lubricating oil cannot be supplied accurately. Further, when the guide pipe swings, the guide pipe may be damaged due to contact with the case.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lubricating device for a power transmission mechanism that can accurately supply lubricating oil and suppress damage to pipes.

In order to achieve the above object, the invention described in claim 1
An oil pump (for example, an oil pump 44 in an embodiment described later);
A case having first and second cases (for example, first and second cases 11A and 11B in the embodiments described later) and accommodating a rotating body (for example, a mission case 11 in the embodiments described later);
A lubricating device for a power transmission mechanism (e.g., a transmission 10 in an embodiment described later) including a pipe (e.g., a lubricating pipe 46 in an embodiment described later) for supplying lubricating oil to the rotating body,
The pipe has a first pipe having one end (for example, one end 47a in an embodiment described later) connected to the oil pump and the other end (for example, the other end 47b in an embodiment described later) extending toward the second case side. A part (for example, the first pipe part 47 of the embodiment described later) and one end (for example, one end 48a of the embodiment described later) are located on the second case side and the other end (for example, the other end of the embodiment described later) 48b) a second pipe part (for example, a second pipe part 48 in an embodiment described later) located in a direction away from the second case, the other end of the first pipe part, and one end of the second pipe part. And a third pipe part (for example, a third pipe part 49 of the later-described embodiment) that extends along a wall surface of the second case (for example, an inner wall surface 70 of the later-described embodiment), and the oil Supplied from pump It said lubricating oil through the third pipe portion from the first pipe portion is supplied to the second pipe portion that,
The third pipe portion has a bent portion (for example, a bent portion 49c in an embodiment described later),
On the wall surface of the second case (for example, the inner wall surface 70 of the embodiment described later), a first holding portion (for example, an embodiment described later) is located upstream of the bent portion and at a position corresponding to the third pipe portion. The first holding portion 73) is formed, and the second holding portion (for example, the second holding portion 74 in the embodiment described later) is located downstream of the bent portion and at a position corresponding to the third pipe portion. Formed,
At least the distance between the position corresponding to the first holding part of the third pipe part and the bent part (for example, the distance L1 of the embodiment described later) and the second holding part of the third pipe part An oil hole for supplying oil to the rotating body (for example, an oil hole 49d in an embodiment described later), whichever is shorter of a distance between the position to be bent and the distance between the bent portion (for example, distance L2 in the embodiment described later) Is provided.

Moreover, in addition to the structure of Claim 1, the invention of Claim 2 is
The first holding portion and the second holding portion are tapered in a V shape or a mortar shape in a cross-sectional view so as to support the third pipe portion (for example, a tapered surface 76 in an embodiment described later, 77) is formed.

In addition to the configuration described in claim 1 or 2, the invention described in claim 3
The oil hole opens toward the wall surface of the second case,
On the wall surface of the second case, a ridge (for example, a ridge 79 in an embodiment described later) is formed at a discharge position where the lubricating oil supplied from the oil hole hits.
The flange extends from the discharge position of the oil hole toward the shaft as the rotating body constituting the speed change mechanism.

Moreover, in addition to the structure of any one of Claims 1-3, invention of Claim 4 is provided.
The rotating body is composed of a plurality of shafts (for example, a first main shaft MS1, a second main shaft MS2, etc. in an embodiment described later) constituting a speed change mechanism,
The oil hole supplies the lubricating oil to a shaft (for example, a reverse shaft RS in an embodiment described later) having a shaft in the lower portion in the vertical direction among the plurality of shafts.

Moreover, in addition to the structure of Claim 2, the invention of Claim 5 is
The first holding part and the second holding part are formed with a tapered surface on a convex part (for example, a convex part 75 in an embodiment described later),
The height of the convex part is set to the same height as the mating surfaces of the first and second cases (for example, the mating surface X in the embodiment described later).

According to the first aspect of the present invention, the third pipe portion is fixed to the first holding portion and the second holding portion formed on the wall surface of the second case even when the oil pressure is increased during the operation of the oil pump. Therefore, the displacement of the third pipe portion can be suppressed without providing a stay, and thereby damage to the pipe can be suppressed.
In addition, at least the distance between the position corresponding to the first holding portion of the third pipe portion and the bent portion, or the distance between the position corresponding to the second holding portion of the third pipe portion and the bent portion, whichever is shorter In addition, an oil hole for supplying lubricating oil to the rotating body is provided, in other words, an oil hole is provided on the smaller displacement side. Can be supplied accurately.

  According to the second aspect of the present invention, the third pipe portion can be held more reliably even when the hydraulic pressure is increased.

  According to the third aspect of the present invention, the lubricating oil can be more reliably supplied to the shaft by discharging the lubricating oil toward the eaves.

  According to the fourth aspect of the present invention, the lubricating oil is supplied from the oil hole whose position is controlled with the highest accuracy to the shaft having the shaft in the lower portion in the vertical direction. Lubricating oil can be supplied.

It is a figure which shows the power transmission mechanism for motor vehicles provided with the lubricating device which concerns on this invention, (a) is the figure which looked at the 1st case and the transmission mechanism from the inside, (b) looked at the 2nd case from the inside. It is a figure. It is a perspective view of the lubricating device inside a mission case. It is a top view of the inner wall surface of the 2nd case which supports a lubrication pipe. It is a longitudinal cross-sectional view around the 1st holding | maintenance part holding a lubrication pipe. It is the sectional view on the AA line of FIG.

  Hereinafter, an embodiment of a lubricating device for a power transmission mechanism (hereinafter referred to as a transmission) according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, a transmission 10 for an automobile rotates in a direction perpendicular to the paper surface inside a mission case 11 formed by a first case 11A, a second case 11B, and a side cover 11C. A transmission mechanism including a first main shaft MS1, a second main shaft MS2, an idle shaft IS, a counter shaft CS, a reverse shaft RS, and a differential device D serving as axes, and a motor (not shown) are arranged. A motor (not shown) is disposed between the speed change mechanism and the side cover 11C so as to be adjacent to the speed change mechanism. As shown by the arrows in FIG. 1, the transmission 10 has the differential device D side forward and the reverse shaft side forward and backward with the left and right sides of the paper in the vertical direction. It arrange | positions so that it may become back. Therefore, the rotation axis of each shaft is in the vehicle width direction of the vehicle.

  Power from an engine and / or motor (not shown) is input from the first main shaft MS1 and can be output to the countershaft CS. Further, the power input to the first main shaft MS1 can be input to the second main shaft MS2 via the idle shaft IS, and the power input to the second main shaft MS2 can be output to the counter shaft CS. Composed. Further, the power input to the first main shaft MS1 is configured to be transmitted to the reverse shaft RS, and is configured to be output from the reverse shaft RS to the counter shaft CS via the idle shaft IS and the second main shaft MS2. . Each shaft is provided with a shift for switching the meshing between the gears so that the gear can be selected and the power transmission path can be switched. The power transmitted to the countershaft CS is input to the differential device D and output to a wheel (not shown).

  An oil reservoir 12 that stores oil that serves both for lubrication and motor cooling is formed at the bottom of the mission case 11, and the oil stored in the oil reservoir 12 is oil strainer 50 provided in the mission case 11. Then, the oil flows to the oil pump 44 attached to the upper part of the first case 11A via the suction pipe 42.

  The oil pump 44 has a lubrication pipe 46 and a connection pipe 43 that are different from the suction pipe 42 connected to the second case 11B side and the side cover 11C side of the oil pump 44. While being supplied to a shaft, a gear meshing part, etc., it is supplied to a motor (not shown) through a connecting pipe 43.

  More specifically, the connecting pipe 43 has one end connected to the oil pump 44 and the other end connected to the side cover 11C, and oil supplied from the oil pump 44 is supplied to the side cover 11C via the connecting pipe 43. And supplied from the side cover 11C to a motor (not shown). In addition, an oil hole may be provided in the connection pipe 43, and the oil may be supplied from the connection pipe to a motor (not shown).

  The lubrication pipe 46 has one end 47a connected to the oil pump 44 and the other end 47b extending toward the second case 11B, one end 48a located on the second case 11B side, and the other end 48b being the second end 48b. The second pipe part 48 located in the direction away from the two cases 11B, the other end 47b of the first pipe part 47, and the one end 48a of the second pipe part 48 are connected to extend along the inner wall surface 70 of the second case 11B. 3 pipe portions 49. The other end 48b of the second pipe portion 48 is fixed to the first case 11A. While the oil pump 44 is stopped, the lubricating pipe 46 is connected to one end 47a of the first pipe portion 47 and the other end 48b of the second pipe portion 48. It is supported by.

  The third pipe part 49 is connected to the other end 47b of the first pipe part 47 at the first pipe part side end 49a, and is connected to the one end 48a of the second pipe part 48 at the second pipe part side end 49b. Is done. Between the first pipe part side end part 49b and the second pipe part side end part 49b of the third pipe part 49, the first pipe part side end part 49a is parallel to the inner wall surface 70 of the second case 11B. A bent portion 49c that is bent in a plane is formed, and the oil flow direction is different between the upstream side and the downstream side of the bent portion 49c.

  As shown in FIGS. 1B and 3, the inner wall surface 70 of the second case 11 </ b> B is in the vicinity of the first pipe portion side end portion 49 a upstream of the bent portion 49 c and corresponds to the third pipe portion 49. The first holding part 73 is formed at a position where the second pipe part 49 is located, and the second holding part 74 is formed at a position corresponding to the third pipe part 49 in the vicinity of the second pipe part side end part 49b downstream of the bent part 49c. .

  As shown in FIG. 5, the first and second holding portions 73 and 74 are tapered in a bowl shape in a cross-sectional view in a convex portion 75 projecting from the inner wall surface 70 of the second case 11B toward the first case 11A side. 76 and 77 are formed. When the transmission 10 is assembled, as shown by the solid line in FIG. 5, a predetermined gap is provided between the first holding portion 73 and the third pipe portion 49 and between the second holding portion 74 and the third pipe portion 49. T is formed and both are in a non-contact state. On the other hand, once the oil pump 44 is operated after the transmission 10 is assembled, the third pipe portion 49 is displaced toward the second case 11B due to the discharge pressure of the oil flowing through the first pipe portion 47, and is always in a contact state. During operation of 44, the third pipe portion 49 is held by the first holding unit 73 and also held by the second holding unit 74. At this time, as indicated by the dotted line in FIG. 5, the third pipe portion 49 is held and positioned at two points on the tapered surfaces 76 and 77 of the first and second holding portions 73 and 74, thereby causing vibrations caused by the engine. Wear of the lubricating pipe 46 due to vibration of the vehicle body during traveling is reduced, and accurate lubrication is ensured. Details of the lubrication will be described later.

  By holding the third pipe portion 49 at the first and second holding portions 73 and 74 in this way, the third pipe portion 49 may be inclined or fallen when it is held at one location. It can be effectively prevented.

  The height of the convex portions 75 constituting the first and second holding portions 73 and 74 is set slightly lower than the height of the mating surface X of the first case 11A and the second case 11B shown in FIG. Has been. In this way, by offsetting the height of the convex portion 75 so as to be slightly lower than the height of the mating surface X, it is possible to prevent the convex portion 75 from being polished when the mating surface X is polished. In addition, you may set the height of the convex part 75 to the same height as the height of the mating surface X of 1st case 11A and 2nd case 11B. By setting to the same height, it is possible to process simultaneously with the mating surface X.

  As shown in FIG. 3, the distance L1 between the first holding portion 73 and the bent portion 49c is shorter than the distance L2 between the second holding portion 74 and the bent portion 49c, and the distance from the bent portion 49c is short. On the other hand, an oil hole 49d is formed between the first holding portion 73 and the bent portion 49c so as to open toward the second case 11B. The oil supplied from the oil hole 49d travels along the inner wall surface 70 of the second case 11B, and is supplied to the reverse shaft RS located at the uppermost part in the mission case 11 among the shafts requiring lubrication. Since the oil supplied to the reverse shaft RS through the inner wall surface 70 passes through the bearing that supports the reverse shaft RS, the bearing can be oil-lubricated.

  The oil holes other than the oil hole 49d may or may not be provided at any position of the third pipe portion 49, but in the present embodiment, the first one having a longer distance from the bent portion 49c. 2 An oil hole 49e is also formed between the holding portion 74 and the bent portion 49c. Further, a plurality of oil holes are also formed in the second pipe portion 48, and oil is supplied from these oil holes to the shafts, gear meshing portions, and the like constituting the speed change mechanism.

  As described above, according to the present embodiment, after the transmission 10 is assembled, when the oil pump 44 is in operation, the third pipe portion 49 is pressed against the second case 11B side by the discharge pressure of the oil flowing through the first pipe portion 47. Since the third pipe portion 49 is held by the first holding portion 73 and also held by the second holding portion 74, the lubrication pipe 46 is fixed to the second case 11B without using stays or bolts. Will be. As a result, the wear of the lubrication pipe 46 due to the vibration of the engine and the vibration of the vehicle body during traveling is reduced, so that the thickness of the lubrication pipe 46 can be reduced in order to determine the thickness in order to prevent damage to the lubrication pipe 46. Thus, the weight and manufacturing cost of the lubrication pipe 46 can be reduced. Further, the number of parts can be reduced and the number of assembling steps can be simplified by not using stays or bolts.

  In addition, by forming the bent portion 49c in the third pipe portion 49, the displacement of the third pipe portion 49 can be more reliably suppressed as compared with the case where the bent portion 49c is formed in a linear shape. The third pipe portion 49 is fixed by the first and second holding portions 73 and 74, and the distance from the bent portion 49c to the first holding portion 73 is compared with the distance from the bent portion 49c to the second holding portion 74. By shortening, the displacement of the part with a short distance can be suppressed with higher accuracy.

  Further, since the oil hole 49d is provided between the first holding portion 73 and the bent portion 49c, which is shorter in distance from the bent portion 49c, the oil hole 49d has extremely high positional accuracy. Therefore, it is possible to accurately lubricate necessary portions. Then, since the oil hole 49d is supplied to the reverse shaft RS located in the uppermost part of the transmission case 11 among the shafts requiring lubrication, the position accuracy is most improved to the part where the oil is hardly scattered due to the rotation of the gear. Accurate lubrication is possible by supplying oil from a high oil hole. Furthermore, since the lubricating oil supplied to the reverse shaft RS is supplied to the other shafts from the reverse shaft RS due to the influence of gravity, optimal lubrication can be performed.

  In the transmission case 11, there is an oil pump shaft above the reverse shaft RS. However, since the oil pump shaft performs self-lubrication by the oil pump 44, the oil pump shaft is at the top of the shafts that need to be lubricated from other sources. The position of the shaft is the reverse shaft RS in the transmission 10 of the present embodiment.

  Further, as shown in FIGS. 1B and 5, a flange 79 extending to the reverse shaft RS is formed at a discharge position where the oil discharged from the oil hole 49d hits the inner wall surface 70 of the second case 11B. preferable. Thus, by discharging oil from the oil hole 49d toward the flange 79, the oil can be more reliably supplied to the reverse shaft RS and the bearing of the reverse shaft RS. The flange 79 is not limited to being integrally formed with the inner wall surface 70 of the second case 11B, and may be configured to be attached to the inner wall surface 70 as a separate body.

  Further, in the above embodiment, the oil hole 49d is supplied to the reverse shaft RS located at the uppermost part in the mission case 11 among the shafts that need lubrication. Any shaft may be supplied as long as it is a shaft. If the shaft has a shaft in the lower part in the vertical direction, the lubricating oil can be efficiently supplied to the shaft located in the lower part by gravity.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
The tapered surfaces 76 and 77 formed on the convex portion 75 are not limited to a bowl shape when viewed in cross section, and may be formed in a V shape.
Moreover, the oil hole provided between the 1st holding | maintenance part 73 and the bending part 49c may provide not only one place but two or more places.
In the above embodiment, the distance L1 between the first holding portion 73 and the bent portion 49c is configured to be shorter than the distance L2 between the second holding portion 74 and the bent portion 49c. A distance L2 between the bent portion 49c and the bent portion 49c may be shorter than a distance L1 between the first holding portion 73 and the bent portion 49c. In this case, an oil hole may be formed at least between the second holding portion 74 and the bent portion 49c, which is the shorter distance from the bent portion 49c.

10 Transmission (Power transmission mechanism)
11 Mission Case (Case)
11A 1st case 11B 2nd case 44 Oil pump 46 Lubrication pipe (pipe)
47 First pipe portion 47a First pipe portion one end 47b First pipe portion other end 48 Second pipe portion 48a Second pipe portion one end 48b Second pipe portion other end 49 Third pipe portion 49c Bending portion 49d Oil Hole 73 First holding portion 74 Second holding portion 75 Convex portions 76, 77 Tapered surface 79 樋 L1 Distance between the position corresponding to the first holding portion and the bent portion L2 Between the position corresponding to the second holding portion and the bent portion Distance RS Reverse shaft (axis)
X mating surface

Claims (5)

An oil pump,
A case having first and second cases and containing a rotating body;
A lubricating device for a power transmission mechanism comprising a pipe for supplying lubricating oil to the rotating body,
The pipe has a first pipe portion with one end connected to the oil pump and the other end extending toward the second case, and a direction in which one end is located on the second case side and the other end is away from the second case. A second pipe part located on the second pipe part, and a third pipe part connecting the other end of the first pipe part and one end of the second pipe part and extending along the wall surface of the second case, and the oil Supplying the lubricating oil supplied from the pump from the first pipe part to the second pipe part via the third pipe part;
The third pipe portion has a bent portion;
The wall surface of the second case is formed with a first holding part at a position upstream of the bent part and corresponding to the third pipe part, and downstream of the bent part and the third pipe part. A second holding portion is formed at a position corresponding to
At least a distance between the position corresponding to the first holding portion of the third pipe portion and the bent portion, and a distance between the position corresponding to the second holding portion of the third pipe portion and the bent portion. An oil hole for supplying oil to the rotating body is provided in either one of the shorter ones.   The tapered surface of the first holding part and the second holding part is formed in a V shape or a mortar shape in a sectional view so as to support the third pipe part. 2. A lubricating device for a power transmission mechanism according to 1. The oil hole opens toward the wall surface of the second case,
On the wall surface of the second case, a ridge is formed at a discharge position where the lubricating oil supplied from the oil hole hits,
3. The lubricating device for a power transmission mechanism according to claim 1, wherein the flange extends from a discharge position of the oil hole toward an axis as the rotating body constituting the transmission mechanism. The rotating body is composed of a plurality of shafts constituting a speed change mechanism,
The said oil hole supplies the said lubricating oil to the axis | shaft which has an axis | shaft in the lower part among the said some axis | shafts in the perpendicular direction, The power transmission mechanism of any one of Claims 1-3 characterized by the above-mentioned. Lubrication device. The first holding part and the second holding part have the tapered surface formed on a convex part,
The lubricating device for a power transmission mechanism according to claim 2, wherein the height of the convex portion is set to the same height as the mating surfaces of the first and second cases.

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