JP2004116735A - Drive unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive unit having easily attachable sealant for sealing an oil passage part formed on the inner peripheral side of a hole part for fitting a shaft for transmitting torque. <P>SOLUTION: The drive unit has at least two sealants 15 between the outer peripheral face of a shaft 12 and the inner peripheral face of a hole part 13 fitted to the shaft 12 for liquid-tightly sealing the inner and outer peripheral surfaces, and an oil passage part 14 opening to the inner peripheral face of the hole part 13 between the sealants 15 formed on the outer peripheral side member 9 with the hole part 13 formed thereon. The oil passage part 14 is formed by cutting out a part of the inner peripheral face side of the hole part 13 without extending over the whole peripheral length, in the radial direction to extend toward the outside, and a plurality of oil paths 16, 17 and 18 communicating to the oil passage part 14 are formed on the outer peripheral side member 9. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a driving device that transmits power via a rotating shaft, and more particularly to a configuration of an oil passage in the driving device.
[0002]
[Prior art]
2. Description of the Related Art A driving device such as a vehicle transmission, a hybrid device, or a torque combining / split device includes a number of rotating members such as gears, clutches, or brakes, and a rotating shaft that transmits torque. Oil is used for control. The supply of the oil is generally performed using the centrifugal force of the rotating member or the discharge pressure of the oil pump. However, when the oil is pressurized and fed, the oil is formed inside the driving device. The oil is sent to a predetermined location via an oil passage.
[0003]
One example is described in Japanese Patent Application Laid-Open No. 9-60714 (Patent Document 1). The transmission described in this publication has an axially protruding shaft portion on the inner surface of the end cover, a sleeve is fitted to the shaft portion, and the entire circumference of the outer peripheral surface of the sleeve is provided. An annular groove is formed, and a seal ring is fitted on both sides of the annular groove. An oil hole communicating with the annular groove is formed in the sleeve so as to open on the inner peripheral surface, and an oil hole communicating with the oil hole is formed in the shaft portion in a state penetrating in the radial direction. I have. On the other hand, on the outer peripheral side of the sleeve, a cylindrical portion on the inner peripheral side which forms a part of the clutch drum is fitted in a tight contact state, and the cylindrical portion is positioned at a position corresponding to the annular groove of the sleeve. An oil hole is formed penetrating in the radial direction, and supplies and discharges pressure oil to and from an oil chamber formed on the inner peripheral side of the cylindrical portion.
[0004]
Further, as a mechanism for supplying lubricating oil to the inside of a drive device, a configuration in which an oil pipe is prevented from rotating by a retainer fixed to a transmission cover by screw is described in Japanese Patent No. 2655407 (Patent Document 2).
[0005]
[Patent Document 1]
JP-A-9-60714 (paragraphs "0017" to "0025", FIG. 1)
[Patent Document 2]
Japanese Patent No. 2655407 (Pages 2 and 3, FIGS. 1 and 2)
[0006]
[Problems to be solved by the invention]
In the configuration described in Japanese Patent Application Laid-Open No. 9-60714, an annular groove is formed on the outer peripheral side of the sleeve, and the sleeve and the cylindrical portion are formed by seal rings fitted on both sides of the annular groove. And pressurized oil is supplied from the inner peripheral side of the annular groove, and is supplied to the oil chamber from the oil hole of the cylindrical portion communicating with the outer peripheral side of the annular groove. It is supposed to. That is, the annular groove is configured as a part of a single continuous oil passage. On the other hand, in the drive device, there is a demand to simplify the oil supply / discharge path by branching the oil from any one oil path to a plurality of locations to supply the oil. In the configuration described in Japanese Patent Application Laid-Open No. 9-60714, it is difficult to adopt a configuration in which a plurality of oil passages are branched from the annular groove, and it is difficult to adopt a configuration in which the amount of oil supplied to a plurality of locations is secured. is there.
[0007]
Furthermore, if the same configuration as the above-mentioned annular groove is adopted when oil is supplied from the rotating shaft to the member on the outer peripheral side, the inner peripheral member on the outer peripheral side may be used for reasons such as strength and workability. An annular groove is formed on the surface, and the seal ring is fitted to the rotating shaft. However, in such a configuration, when the rotary shaft is inserted into the member on the outer peripheral side and assembled, the seal ring fitted to the rotary shaft expands at the annular groove portion, and the edge portion of the annular groove extends. Thus, the seal ring may be damaged, or the assemblability may be deteriorated. In order to avoid such inconvenience, it is conceivable to perform chamfering on the edge of the annular groove. However, in order to do so, dimensions for chamfering are required in addition to the width of the annular groove. In addition, there is a problem that the axial length of the entire apparatus becomes long.
[0008]
The present invention has been made in view of the above technical problem, and provides a drive device capable of supplying oil to a plurality of locations and having an oil path configuration with good assemblability. The purpose is.
[0009]
Means for Solving the Problems and Their Functions
In order to achieve the above object, the present invention provides an oil chamber formed by cutting out an inner peripheral side of a hole into which a shaft is fitted so as not to cover the entire periphery thereof, and through the oil chamber. Oil is supplied to and discharged from a predetermined location. That is, according to the first aspect of the present invention, the shaft is fitted into the hole formed in the outer peripheral side member, and the gap between the inner and outer peripheral surfaces is provided between the outer peripheral surface of the shaft and the inner peripheral surface of the hole. A drive device in which at least two sealing members for sealing in a liquid-tight state are interposed, and an oil passage opening between the sealing members on the inner peripheral surface of the hole is formed in the outer peripheral member. In the above, the oil passage portion is formed by cutting out a portion on the inner peripheral surface side of the hole portion so as to extend outward in a radial direction within a range not extending over the entire circumference, and a plurality of the oil passage portions communicate with the oil passage portion. Is formed in the outer peripheral side member.
[0010]
Therefore, in the first aspect of the present invention, the oil passage is formed on the inner peripheral side of the hole in which the shaft is fitted, and the plurality of oil passages communicate with the oil passage. Oil is supplied / discharged through the oil passage portion. Since the oil passage portion is formed by cutting out the portion on the inner peripheral side of the hole so as not to cover the entire circumference, the shaft fitted with the sealing material is inserted into the hole, When the sealing material passes through the oil passage, the sealing material does not completely spread to the outer peripheral side. That is, the so-called catching of the sealing material with respect to the edge of the oil passage portion is avoided or suppressed. Further, the oil passage portion is formed on the outer peripheral side member to which the shaft is fitted, and its volume is easily ensured, so that there is no shortage of oil supply to the plurality of oil passages.
[0011]
According to a second aspect of the present invention, in the configuration of the first aspect, a pipe member communicating with at least one of the plurality of oil passages is attached to the outer peripheral side member, and a restricting portion that restricts movement of the pipe member. Is provided between the case accommodating the shaft and the outer peripheral member and the pipe member.
[0012]
Therefore, according to the second aspect of the present invention, oil is guided to the pipe member through the oil passage and the oil passage, and the oil is supplied to a predetermined location from the pipe member. The movement of the pipe member is regulated by a regulation portion between the case and the case. Therefore, the pipe member can be attached to the outer peripheral member even in a simple attachment state such as being inserted into the outer peripheral side member.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described based on specific examples. The example shown in FIG. 1 is an example in which the present invention is applied to a mechanical distribution type hybrid drive device for a front-engine rear-wheel drive vehicle. This drive device includes two motor generators 1, 1 arranged in the axial direction. 2 is provided. The motor generator 1 on the front side is housed inside the front case 3, and the motor generator 2 on the rear side is housed inside the rear case 4, and these cases 3 and 4 are joined at their respective ends. Thus, the motor generators 1 and 2 are arranged side by side in the axial direction.
[0014]
On the rear side of the front case 3, a partition wall portion 5 extending inward is formed, and a rotor 6 of the motor generator 1 is rotated by a bearing 6 fitted to the inner peripheral end of the partition wall portion 5. It is freely held. The rotor shaft 7 is a hollow shaft, and the input shaft 8 is inserted inside the rotor shaft 7 and held rotatably.
[0015]
On the other hand, on the front side of the rear case 4, a partition plate 9 for partitioning a space for accommodating the motor generator 2 on the rear side is attached. A rotor shaft 10 of the rear motor / generator 2 is rotatably held by a bearing 11 fitted to a predetermined portion of the partition plate 9. The rotor shaft 10 is a hollow shaft, into which an intermediate shaft 12 is inserted and held rotatably.
[0016]
The intermediate shaft 12 is arranged on the same axis as the input shaft 8, and its front end is tightly fitted to the inner peripheral end of the partition plate 9 and protrudes from the partition plate 9 to the front side. Further, it is rotatably fitted to the end of the input shaft 8. That is, the partition plate 9 is formed with a hole portion 13 into which the intermediate shaft 12 is fitted, and an oil passage portion formed by cutting a radially outer portion at a substantially central portion in the axial direction of the inner peripheral portion. (Or an oil chamber) 14 is formed.
[0017]
The oil passage portion 14 is formed by cutting out the inner peripheral portion of the hole portion 13 without extending over the entire periphery. In the specific example shown here, as shown in FIG. It has a substantially crescent-shaped cross section over an angle range of about (１ ／ circumference). In addition, the width and the depth in the radial direction are set to dimensions that are volumes that can secure the amount of oil required in a plurality of oil passages described below.
[0018]
In addition, the opening end on the inner peripheral side of the oil passage portion 14 forms a sliding surface by fitting the intermediate shaft 12, so that liquid tightness between the intermediate shaft 12 and the partition plate 9 is ensured. For this purpose, seal rings (that is, seal materials) 15 are provided on both sides of the oil passage portion 14 in the axial direction. These seal rings 15 are fitted inside annular grooves formed in the intermediate shaft 12 and are held by the annular grooves in the axial direction, and also use their own elastic force radially outward. It is slidably adhered to the inner peripheral surface of the hole 13.
[0019]
Since these seal rings 15 are located on both sides of the oil passage portion 14, the intermediate shaft 12 is inserted into the hole 13 while these seal rings 15 are fitted in the annular groove of the intermediate shaft 12. In the case of fitting, one of the seal rings 15 passes through the opening end of the oil passage portion 14 in the axial direction. In this case, even if the elastic force of the seal ring 15 acts outward in the radial direction, the opening of the oil passage portion 14 does not cover the entire circumference (in the example shown in the drawing, the range is approximately 120 degrees). The expansion of the seal ring 15 in the radial direction is prevented or suppressed. As a result, the seal ring 15 passes through the open end of the oil passage portion 14 without being caught on the open end of the oil passage portion 14 or without causing any trouble even if the seal ring 15 is caught. The hole 13 can be fitted.
[0020]
The intermediate shaft 12 corresponds to the “shaft” in the present invention, and thus the partition plate 9 corresponds to the “outer peripheral side member” in the present invention. Are formed (in the illustrated example, three oil passages) are respectively connected to the oil passages 16, 17, 18. One of the oil passages 16 is an inflow oil passage, which is opened on the outer peripheral surface of the partition plate 9 which is in close contact with the inner peripheral surface of the rear case 4, and has an open end formed on the rear case 4. Roads (not shown) are in communication.
[0021]
The other oil passage 17 is for supplying oil to the rear motor / generator 2 as cooling oil, extends inside the partition plate 9 to the outer peripheral side, and -It is bent in the axial direction at a position on the outer peripheral side from the outer peripheral end of the generator 2 and opens to the side surface of the partition plate 9. A pipe 19 whose front end extends to the outer peripheral side of the motor generator 2 on the rear side is fitted into the opening end. That is, the oil supplied via the oil passage 17 and the pipe 19 is sprayed on the outer peripheral side of the motor generator 2 (that is, a stator having a coil) to cool the motor generator 2.
[0022]
A restricting portion for restricting the pipe 19 to be attached to the partition plate 9 is provided. More specifically, a concave portion 20 bulging outward in the radial direction is formed near the pipe 9 on the inner peripheral portion of the rear case 4 as shown in FIG. The recess 20 has a relatively small width in the circumferential direction, and is recessed inward at a predetermined position in the tip direction of the pipe 19. A metal bent piece 21 loosely fitted into the recess 20 is fixedly integrated with the outer surface of the pipe 19. Therefore, the pipe 19 is prevented from coming out of the partition plate 9 by the bent piece 21 abutting on the inner surface of the recess 20 in the axial direction, and the bent piece 21 is brought into contact with the inner surface of the recess 20 in the circumferential direction. By contact, the pipe 19 rotates so that the bent piece 21 does not come out of the recess 20.
[0023]
The oil passage 17 branches at the outer peripheral portion of the partition plate 9 and bends toward the motor generator 1 on the front side, and is opened at the tip of a cylindrical portion formed integrally with the outer peripheral portion of the partition plate 9. are doing. The tip portion contacts an integral part of the front case 3 and communicates with an oil passage 22 formed in that part. The oil passage 22 communicates with an oil reservoir 23 formed on the inner peripheral portion of the front case 3.
[0024]
The other oil passage 18 has the same configuration as the one oil passage 17 described above. That is, the oil passage 18 extends inside the partition wall portion 9 to the outer peripheral side, and is branched at the outer peripheral portion of the partition wall portion 9 into a front side and a rear side. A pipe (not shown) similar to the pipe 19 is attached to the opening end of the oil passage branched to the rear side. The oil passage branched to the front side communicates with the oil reservoir 23.
[0025]
A through hole 24 is formed along the central axis of the intermediate shaft 12, and an oil passage 25 formed radially from the through hole 24 opens at a position corresponding to the oil passage portion 14. I have.
[0026]
Further, a mechanism for transmitting torque between the input shaft 8 and the front-side motor / generator 1 and the intermediate shaft 12 will be briefly described. A single pinion type planetary gear mechanism 26 A combining division mechanism is provided. The sun gear 27 is rotatably fitted to the input shaft 8 and is connected to the rotor shaft 7 of the front motor / generator 1. A carrier 28 holding a pinion gear meshing with the sun gear 27 is connected to the input shaft 8. Further, a ring gear 29 arranged concentrically with the sun gear 27 and meshing with the pinion gear is connected to and integrated with the intermediate shaft 12.
[0027]
In the above-described driving device, the oil sent through the inflow oil passage 16 formed inside the partition plate 9 or the through-hole 24 of the intermediate shaft 12 in addition to the oil passage 16 is supplied to the oil passage portion 14. Inflow. From here, the oil is dispersed and supplied to other oil passages 17 and 18. In this case, the oil passage portion 14 is formed by notching the inner peripheral portion of the hole portion 13 and has a sufficiently large volume, so that the oil passage portion 14 does not limit the flow rate of oil, and Necessary and sufficient oil can be supplied to the passages 17 and 18.
[0028]
The oil sent to each of the oil passages 17 and 18 is sprayed to the motor generator 2 on the rear side via the pipe 19, and the motor / generator 2 is cooled by the oil. Since the bent piece 21 integral with the pipe 19 is fitted in the concave portion 20 formed in the rear case 2 and its movement is regulated in the axial direction and the circumferential direction, the pipe 19 is similarly moved in the axial direction and the circumferential direction. The movement is restricted in the direction, and as a result, the partition plate 9 is prevented from coming off. In other words, the pipe 19 does not fall out of the partition plate 9 even in a simple fitting state. The oil supplied to each of the oil passages 17 and 18 is supplied to an oil reservoir 23 through an oil passage 22 in the front case 3 to cool the motor generator 1 on the front side or lubricate other predetermined portions. Served for
[0029]
On the other hand, the oil passage portion 14 is opened on the inner peripheral side of the hole portion 13, and the intermediate shaft 12 is fitted at the opening end thereof, and the two Since the seal rings 15 are disposed on both sides of the opening end of the oil passage portion 14, oil does not leak from the oil passage portion 14 unnecessarily. The seal ring 15 is fed into the inner peripheral side of the hole 13 while being fitted to the intermediate shaft 12 and is brought into close contact with the inner peripheral surface of the hole 13. As described above, when passing across the end, the intermediate shaft 12 and the partition plate 9 can be easily assembled without being caught by the opening end of the oil passage portion 14.
[0030]
In addition, this invention is not limited to the said specific example. Therefore, in the above specific example, one oil passage is formed. However, a plurality of oil passages in the present invention may be provided. In short, the oil passage is opened continuously over the entire circumference of the hole. If not. Further, the above specific example is an example in which the present invention is applied to a hybrid drive device, but the present invention can be applied to other drive devices such as a vehicle transmission. Further, the restricting portion of the present invention is not limited to the configuration including the concave portion 20 and the bent piece 21 described above. In other words, the restricting portion may have any configuration that restricts the pipe member from coming out of the opening end of the oil passage.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, the oil passage portion is formed by cutting out the inner peripheral side portion of the hole in a range not extending over the entire circumference. Is inserted into the hole, and when the seal material passes through the oil passage portion, the seal material does not completely spread to the outer peripheral side, and therefore, the seal material with respect to the edge of the oil passage portion. So-called snagging can be avoided or suppressed to improve assemblability. Further, since the oil passage is formed on the outer peripheral member on which the shaft is fitted and the volume thereof is easily ensured, shortage of oil supply to the plurality of oil passages can be prevented or suppressed.
[0032]
According to the second aspect of the present invention, since the movement of the pipe member attached to the outer peripheral member is restricted by the restricting portion between the outer member and the case, the pipe member can be easily inserted into the outer peripheral member. The pipe member can be attached to the outer peripheral member even in a proper attachment state, and in this respect also, the assemblability of the drive device can be improved.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing an example of a driving device according to the present invention.
FIG. 2 is a partial sectional view showing the shape of the oil passage portion.
FIG. 3 is a partial view showing an example of a structure for restricting the movement of a pipe.
[Explanation of symbols]
3, 4 ... case, 9 ... partition plate, 12 ... intermediate shaft, 13 ... hole, 14 ... oil passage, 15 ... seal ring, 16, 17, 18 ... oil passage, 19 ... pipe, 20 ... recess, 21 … Bent piece.

Claims (2)

A shaft is fitted into a hole formed in the outer peripheral member, and at least two seals are provided between the outer peripheral surface of the shaft and the inner peripheral surface of the hole in a liquid-tight manner between the inner and outer peripheral surfaces. A drive device in which an oil passage portion that opens on the inner peripheral surface of the hole portion between the seal materials while the seal materials are interposed is formed in the outer peripheral member.
The oil passage portion is formed by notching the portion on the inner peripheral surface side of the hole portion so as to expand radially outward in a range not extending over the entire circumference, and a plurality of oils communicating with the oil passage portion are formed. A drive device, wherein a road is formed in the outer peripheral side member. A case and a pipe, wherein a pipe member communicating with at least one of the plurality of oil passages is attached to the outer peripheral member, and a regulating portion for regulating movement of the pipe member accommodates the shaft and the outer peripheral member. The driving device according to claim 1, wherein the driving device is provided between the driving device and a member.

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