JP2008106674A - Lubricating oil supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating oil supply system capable of inhibiting the lifetime of a seal member from being shortened due to sliding heat generation during engine operation while retaining lubrication effect of lubricating oil supplied to each lubrication section of an internal combustion engine. <P>SOLUTION: Part of lubricating oil supplied to a part between an output shaft 10 and a cylinder block 2 and flowing out from the part between an output shaft 10 and the cylinder block 2 is supplied to a bearing 21 and a one-way clutch 23. A seal member 25 is provided between an outer race 23c rotating as one unit with the output shaft 10 and a ring gear 24 to inhibit lubricating oil supplied to the same from flowing out to a radial direction with accompanying rotation of the output shaft 10. A through-hole 24b is formed at a part opposing to the seal member 25 in the ring gear 24. Part of lubricating oil flowing out of a part between the output shaft 10 and a cylinder block 2 via the through-hole 24b and flowing to the radial direction with accompanying rotation of the output shaft 10 is oriented to the seal member 25 side and is supplied to the seal member 25. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lubricating oil supply system that supplies lubricating oil to a starting device of an internal combustion engine.

  In a starter for starting an internal combustion engine, for example, as described in Patent Document 1, the output shaft of the internal combustion engine is rotationally driven by the rotational force of the starter motor until the internal combustion engine is in a state where it can operate independently. What is made is known. FIG. 4 shows a general configuration of a starting device including such a conventional one. As shown in FIG. 4, an output shaft 110 of the internal combustion engine is rotatably supported on the cylinder block 102, and an inner ring of a bearing 121 is fitted on the end portion thereof. A substantially annular ring gear 124 is provided on the outer periphery of the bearing 121, and this ring gear 124 is attached to the outer ring of the bearing 121 via an inner race 123a. That is, the ring gear 124 is supported by the bearing 121 so as to be rotatable relative to the output shaft 110. An outer race 123c is attached to the connecting member 122 fixed to the output shaft 110, and torque is transmitted from the outer race 123c to the inner race 123a between the outer race 123c and the inner race 123a. Sprags 123b that allow only these are provided. The one-way clutch 123 is constituted by the inner race 123a, the sprag 123b, and the outer race. A starting motor 120 is disposed in the vicinity of the outer periphery of the ring gear 124. A pinion gear 120b is formed on the output shaft 120a of the starting motor 120, and an annular gear 124a is fitted and fixed to the outer periphery of the ring gear 124. The pinion gear 120b and the gear 124a are engaged with each other. Has been.

  When the ring gear 124 is rotationally driven by the starter motor 120 when starting the internal combustion engine, the rotational force of the ring gear 124 is transmitted from the one-way clutch 123 to the output shaft 110 of the internal combustion engine, and the internal combustion engine is in the cranking state. Become. On the other hand, when the rotation speed of the output shaft 110 exceeds the rotation speed of the ring gear 124, the engagement between the inner race 123a and the outer race 123c by the sprag 123b is released, and the ring gear 124 rotates idle. When the internal combustion engine is completely detonated, in other words, when the internal combustion engine is operated independently, the driving of the starter motor 120 is stopped, and the rotation of the ring gear 124 is also stopped accordingly.

  Here, in such a starting device, it is desirable to suppress increase in rotational resistance and wear by supplying lubricating oil to the bearing 121 and the one-way clutch 123. As a configuration for supplying the lubricating oil to the bearing 121 and the one-way clutch 123 in this way, for example, a part of the lubricating oil supplied to the sliding portion between the cylinder block 102 and the output shaft 110 is used for the bearing 121 and the one-way clutch. A configuration of supplying to the clutch 123 is usually employed. Specifically, as shown in FIG. 4, the internal combustion engine is provided with a hydraulic pump 130 driven by the output shaft 110, and the hydraulic pump 130 sucks the lubricating oil stored in the oil pan 103. The pressure is supplied to each lubricating part of the internal combustion engine such as a sliding part between the cylinder block 102 and the output shaft 110 through the lubricating oil supply passage. Part of the lubricating oil supplied in this way flows down to the dam member provided below the vertical direction by its own weight and is collected in the oil pan 103, while the output shaft 110 rotates in the other part. As a result of the centrifugal force generated along with this, it flows in the radial direction as shown by the arrow in FIG. 4 and flows between the inner and outer rings of the bearing 121 for lubrication. Then, a part of the lubricating oil flowing between the inner and outer rings of the bearing 121 in this way further flows in the radial direction due to the centrifugal force, and enters the sliding portion of the one-way clutch 123 from between the bearing 121 and the connecting member 122. Is also supplied to provide lubrication for the one-way clutch 123.

By the way, if the lubricating oil is scattered between the outer race 123c and the ring gear 124 or between the ring gear 124 and the cylinder block 102, a part of the lubricating oil cannot be collected in the oil pan 103. There is a fear. Therefore, as shown in FIG. 4, by disposing annular seal members 125 and 126 between the outer race 123c and the ring gear 124 and between the ring gear 124 and the cylinder block 102, respectively. The scattering of the lubricating oil can be suppressed. The seal member 125 is fixed to the ring gear 124 and has a lip 125a capable of rotating and sliding on the outer race 123c, while the seal member 126 is fixed to the cylinder block 102 and rotated to the ring gear 124. Formed by a slidable lip 126a.
JP-A-10-122107

  Thus, by disposing the seal members 125 and 126 between the outer race 123c and the ring gear 124 and between the ring gear 124 and the cylinder block 102, scattering of the lubricating oil can be suppressed. However, as described above, when the internal combustion engine operates independently, the rotation of the ring gear 124 stops while the output motor 110 rotates as the starter motor 120 stops. As a result, during the self-sustained operation of the internal combustion engine, the lip 125a of the seal member 125 always slides on the outer peripheral surface of the outer race 123c, and the sliding heat generation between the lip 125a and the outer race 123c causes the seal member 125 and the outer race 123c to move. The temperature of the race 123c may increase. Here, since the lip 125a of the seal member 125 is usually formed of rubber, resin, or the like, it cannot be denied that if the temperature rises excessively as described above, the life of the seal member 125 is shortened. In particular, when the internal combustion engine is operated at a high rotational speed, such inconvenience becomes more prominent, and inconvenience such as oil leakage of the seal member 125 may occur.

  Therefore, in order to suppress this, for example, as shown by the broken line in FIG. 4, an injection passage branched from the lubricating oil supply passage and opening toward the bearing 121 is formed, and the lubricating oil is directly injected into the bearing 121. By adopting the structure, it is conceivable to increase the amount of lubricating oil supplied to the seal member 125 and improve the cooling effect by the lubricating oil. However, if an injection passage for directly injecting the lubricating oil is formed in the bearing 121, the hydraulic pressure of the lubricating oil supplied to the other lubricating parts in the internal combustion engine is lowered, and the lubricating effect of the lubricating oil may be deteriorated. In addition, when a large amount of lubricating oil is supplied to the bearing 121 and the one-way clutch 123 in this way, the agitation resistance of the bearing 121 and the one-way clutch 123 by the lubricating oil increases, which may deteriorate the fuel consumption of the internal combustion engine.

  The present invention has been made in view of such conventional circumstances, and its purpose is to generate sliding heat during engine operation while maintaining the lubricating effect of the lubricating oil supplied to each lubricating part of the internal combustion engine. An object of the present invention is to provide a lubricating oil supply system capable of suppressing the shortening of the life of a seal member.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
In order to solve such a problem, the invention according to claim 1 is characterized in that the ring gear can be rotated relative to the end of the output shaft by a bearing provided at the end of the output shaft supported by the engine body of the internal combustion engine. And supporting the output shaft and the ring gear via a one-way clutch that allows only the transmission of rotational force from the ring gear to the output shaft, until the internal combustion engine is in a state where it can operate independently. A lubricating oil supply system for supplying a lubricating oil to a starting device for starting an internal combustion engine by rotating a gear by a starting motor and transmitting the rotational force from the one-way clutch to the output shaft. Part of the lubricating oil that is supplied between the output shaft and the engine main body through the lubricating oil supply passage and flows out between the output shaft and the engine main body is transferred to the bearing and the shaft. A rotating member that is supplied to at least one of the way clutches and that rotates together with the ring gear and the output shaft so as to restrict the lubricating oil supplied thereto to flow out in the radial direction as the output shaft rotates. An annular seal member is provided between the engine body and lubricating oil that flows out from between the output shaft and the engine body and flows in the radial direction as the output shaft rotates. The gist of the invention is that it is provided with directing means for directing to the side.

  According to this configuration, since the directing means for directing the lubricating oil flowing out from between the output shaft and the engine body and flowing in the radial direction along with the rotation of the output shaft to the seal member side is provided, the output The seal portion can be cooled using the lubricating oil supplied between the shaft and the engine body. Therefore, even when the engine comes to operate independently and the ring gear stops and the output shaft rotates as the starter motor stops, the heat generated by sliding between the seal member and the member that is in sliding contact with the seal member An excessive increase in the temperature of the seal member can be suppressed. As a result, it is possible to suppress the shortening of the life of the seal member due to the temperature rise of the seal member. Further, since the seal member is cooled by using the lubricating oil supplied to the rotary sliding portion between the engine body and the output shaft, for example, the amount of the lubricating oil supplied to the bearing or the one-way clutch is increased to increase the sealing member. Compared with a structure that increases the amount of lubricating oil that can reach the engine, a decrease in the hydraulic pressure of the lubricating oil supplied to other lubricating parts of the internal combustion engine is avoided, and the bearing or one-way clutch is agitated due to an increase in the lubricating oil amount. An increase in resistance can be suppressed. That is, according to the above configuration, it is possible to suppress the shortening of the life of the seal member due to sliding heat generation during engine operation while appropriately maintaining the lubrication effect of the lubricating oil at each lubrication site of the internal combustion engine. .

  According to a second aspect of the present invention, the directing means seals a part of the lubricating oil supplied between the output shaft and the engine body on the wall surface of the engine body facing the ring gear. A part of the introduction passage leading to the member side is partitioned, and the directing means projects a portion corresponding to the most downstream portion of the introduction passage on the wall surface of the engine body so as to be close to the seal member A structure such as a protrusion can be employed.

  According to a third aspect of the present invention, in the lubricating oil supply system according to the second aspect, the protruding portion is formed such that a portion protruding so as to be close to the sealing member is bent in a circular arc shape. And

  According to the same configuration, when a part of the lubricating oil is directed to the seal member side through the protruding portion, the flow direction of the lubricating oil can be smoothly changed to suppress the occurrence of the turbulence. A lot of lubricating oil can be supplied to the seal member side.

  The gist of the invention according to claim 4 is the lubricating oil supply system according to claim 2 or 3, wherein the protrusion is formed in an arc shape corresponding to the shape of the seal member. .

  According to this configuration, since the projecting portion extends in an arc shape corresponding to the shape of the seal member, the lubricating oil can be supplied to more parts of the seal member, and the seal member is suitably used. It can be cooled.

  According to a fifth aspect of the present invention, in the lubricating oil supply system according to any one of the first to fourth aspects, the seal member and the engine body are isolated by the ring gear, and the ring gear A gist is that a through hole is formed in a portion facing the seal member, and the directing means directs the lubricating oil to the seal member side through the through hole.

  According to this configuration, even when the configuration in which the seal member and the engine main body are separated from each other by the ring gear has to be adopted, the directing means is inserted through the through hole formed in the ring gear. Lubricating oil can be supplied to the side.

  The invention according to claim 6 is the lubricating oil supply system according to any one of claims 1 to 5, wherein the seal member is fixed to the ring gear and rotates integrally with the output shaft. The outer race of the one-way clutch has a lip that can rotate and slide, and the directing means is formed to direct the lubricating oil to the outer race of the outer race that is in sliding contact with the lip. The gist.

  According to this configuration, by supplying lubricating oil to the sliding portion of the lip and cooling the sliding portion, it is possible to suppress an excessive increase in the temperature of the seal member due to sliding heat generation. Further, for example, as compared with a configuration in which lubricating oil is directly supplied to the lip of the seal member, according to the above configuration, the lip of the seal member is deformed and the pressure between the lip and the rotating member is increased. Thus, it is possible to suppress an increase in sliding heat generation between the lip and the rotating member. Furthermore, even when foreign matter such as metal powder or lubricating oil sludge adheres to the sliding part of the lip, it can be washed away by the lubricating oil supplied to the sliding part. An increase in sliding resistance at the sliding portion of the lip can also be suppressed.

  The invention according to claim 7 is the lubricating oil supply system according to any one of claims 1 to 5, wherein the seal member is fixed to the ring gear and rotates integrally with the output shaft. The gist of the present invention is that the outer race of the one-way clutch has a lip that can rotate and slide, and the directing means is formed to direct lubricating oil to the side of the outer race.

  The outer race of the one-way clutch formed of metal has a higher thermal conductivity than the lip of the seal member formed of resin, rubber, or the like, and therefore is easier to cool than the lip of the seal member. Therefore, by directing the lubricating oil to the side surface of the outer race, the temperature can be effectively lowered by actively cooling the outer race. As a result, the sliding contact portion between the lip and the outer peripheral surface of the outer race can be efficiently cooled, and the shortening of the life of the seal member due to the excessive increase in the temperature of the lip can be further suppressed.

  Hereinafter, an embodiment of a lubricating oil supply system according to the present invention will be described with reference to FIGS. The lubricating oil supply system of this embodiment also supplies lubricating oil to a starting device having the same aspect as the above-described internal combustion engine starting device. FIG. 1 shows the present embodiment corresponding to FIG. The structure of the lubricating oil supply system concerning a form is shown.

  As shown in FIG. 1, even in the starter according to this embodiment, an output shaft 10 of an internal combustion engine is rotatably supported by a cylinder block 2 that is a part of the engine body. As described above, the bearing 21, the one-way clutch 23, the ring gear 24, and the connecting member 22 are attached to the end portion of 10. A starting motor 20 is disposed in the vicinity of the outer periphery of the ring gear 24, and a pinion gear 20b formed on the output shaft 20a of the starting motor 20 is fitted and fixed to the outer periphery of the ring gear 24. Is engaged. In addition, when starting the internal combustion engine, the ring gear 24 is rotationally driven by the starter motor 20 until the internal combustion engine comes to operate independently without borrowing the force of the starter motor 20, and the rotational force of the ring gear 24 is reduced. The transmission from the one-way clutch 23 to the output shaft 10 of the internal combustion engine is the same as that of the conventional starter.

  Further, even in the lubricating oil supply system of the present embodiment, the hydraulic pump 30 driven by the output shaft 10 is provided, and the hydraulic pump 30 sucks the lubricating oil stored in the oil pan 3 and performs this operation. Is supplied to each lubricating part of the internal combustion engine such as a sliding part between the cylinder block 2 and the output shaft 10 through a lubricating oil supply passage such as a supply passage 31 formed in the cylinder block 2. In this way, a part of the lubricating oil supplied between the cylinder block 2 and the output shaft 10 flows down to the dam member 4 provided below the vertical direction due to its own weight and is collected in the oil pan 3. This portion flows in the radial direction as indicated by the arrow in FIG. 1 due to the centrifugal force generated as the output shaft 10 rotates, and flows between the inner and outer rings of the bearing 21 for lubrication. Is done. A part of the lubricating oil that flows between the inner and outer rings of the bearing 21 in this way further flows in the radial direction due to the centrifugal force, and enters the sliding portion of the one-way clutch 23 from between the bearing 21 and the connecting member 22. Is also supplied and used for lubricating the one-way clutch 23.

  In order to suppress scattering of the lubricating oil supplied to the bearing 21 and the one-way clutch 23, an annular shape is provided between the outer race 23c of the one-way clutch 23 and the ring gear 24, and between the ring gear 24 and the cylinder block 2. The sealing members 25 and 26 are disposed respectively. Here, the seal member 25 is fixed to the ring gear 24 and has a lip 25a capable of rotating and sliding on the outer race 23c. On the other hand, the seal member 26 is fixed to the cylinder block 2 and rotated and slid on the ring gear 24. It has a movable lip 26a. The one-way clutch 23, the ring gear 24 and the cylinder block 2 are made of a metal material, and the lips 25a and 26a of the seal members 25 and 26 are made of rubber having excellent oil resistance.

  As described above, in the conventional lubricating oil supply system, the lip of the seal member always slides on the outer peripheral surface of the outer race during the self-sustained operation of the internal combustion engine. In addition, the life of the seal member may be shortened. In order to suppress this, for example, it is conceivable to adopt a structure in which the amount of lubricating oil supplied to the bearing and the one-way clutch is increased to increase the amount of lubricating oil that can reach the seal member. There is a concern that the oil pressure of the lubricating oil supplied to the lubricating oil portion may decrease, or the bearing or the one-way clutch 23 may have an increased stirring resistance due to an increase in the amount of lubricating oil.

  Therefore, in the lubricating oil supply system according to the present embodiment, a configuration that suitably suppresses the above-described inconvenience of lubricating oil in the seal member 25 is employed. Hereinafter, this configuration will be described in detail with reference to FIGS. FIG. 2 is an enlarged cross-sectional view showing a supply mode of the lubricating oil, and FIG. 3 is a side view showing the structure of the ring gear 24.

  As shown in FIGS. 2 and 3, six through holes 24 b are formed uniformly in the circumferential direction in the portion of the ring gear 24 that faces the seal member 25, and faces the ring gear 24 of the cylinder block 2. The introduction wall 50 that guides a part of the lubricating oil supplied between the cylinder block 2 and the output shaft 10 to the seal member 25 side is defined by the wall surface 40 that performs the above operation. A portion of the wall surface 40 corresponding to the most downstream portion of the introduction passage 50 protrudes so as to be close to the seal member 25, and corresponds to the shape of the seal member 25, in other words, the shape of the outer race 23c. A projecting portion 41 extending in an arc shape is formed. Further, the projecting portion 41 has a portion that projects so as to be close to the seal member 25 in a circular arc shape. With such a configuration, the lubricating oil flowing along the radial direction of the ring gear 24 is directed to the seal member 25 side at the protruding portion 41, most of which collides with the side surface of the outer race 23 c and a part of the seal member 25. The lip 25a is also supplied.

According to the embodiment described above, the following effects can be obtained.
(1) Protrusions 41 functioning as directing means for directing the lubricating oil that flows out between the output shaft 10 and the cylinder block 2 and flows in the radial direction as the output shaft 10 rotates to the seal member 25 side. It was decided to form. Therefore, even when the engine comes to operate independently and the ring gear 24 stops and the output shaft 10 rotates as the starter motor 20 stops, the outer race 23c slidably contacts the seal member 25. It is possible to suppress the temperature of the seal member 25 from excessively rising due to the sliding heat generation. As a result, the shortening of the life of the seal member 25 due to the temperature rise of the seal member 25 can be suppressed. Compared with a structure in which the amount of lubricating oil supplied to the bearing 21 or the one-way clutch 23 is increased to increase the amount of lubricating oil that can reach the seal member 25, the lubricating oil is supplied to other lubricating parts of the internal combustion engine. Thus, it is possible to prevent a decrease in the hydraulic pressure of the lubricating oil and to suppress an increase in the stirring resistance of the bearing 21 or the one-way clutch 23 due to an increase in the amount of the lubricating oil. That is, according to the present embodiment, it is possible to suppress the shortening of the service life of the seal member 25 due to sliding heat generation during engine operation while appropriately maintaining the lubrication effect of the lubricating oil at each lubrication site of the internal combustion engine. become.

  (2) Since the projecting portion 41 is curved so that the projecting portion 41 is close to the seal member 25 in a circular arc shape, when the lubricating oil is directed to the seal member 25 side through the projecting portion 41, the lubricating oil The flow direction can be smoothly changed to prevent the flow from being disturbed, and more lubricating oil can be supplied to the seal member 25 side.

  (3) A through hole 24b is formed in a portion of the ring gear 24 facing the seal member 25. Therefore, for example, even when a configuration in which the seal member 25 and the cylinder block 2 are separated from each other by the ring gear 24, such as a starting device for an internal combustion engine according to the present embodiment, must be adopted, the directing means can be used for the ring. Lubricating oil can be supplied to the seal member 25 side through a through hole 24 b formed in the gear 24.

  (4) Since the outer race 23c of the one-way clutch 23 formed of metal has a higher thermal conductivity than the lip 25a of the seal member 25 formed of rubber, the outer race 23c is compared with the lip 25a of the seal member 25. Easy to cool. Therefore, the protrusion 41 is formed at a position facing the side surface of the outer race 23c of the one-way clutch 23, and the outer race 23c is actively cooled by directing the lubricating oil to the side surface of the outer race 23c. The temperature can be effectively reduced. As a result, the sliding contact portion between the lip 25a and the outer peripheral surface of the outer race 23c can be efficiently cooled, and the shortening of the life of the seal member 25 due to excessive increase in the temperature of the lip 25a can be further suppressed. It becomes like this. Further, for example, compared to a configuration in which lubricating oil is directly supplied to the lip 25a of the seal member 25, according to the present embodiment, the lip 25a is deformed and the pressure between the lip 25a and the outer race 23c increases. As a result, the increase in sliding heat generation between the lip 25a and the outer race 23c can be suppressed.

  (5) In the wall surface 40, the protrusion 41 is formed so as to extend in an arc shape corresponding to the shape of the seal member 25, in other words, the shape of the outer race 23c. Therefore, the lubricating oil can be directed to a larger portion of the side surface of the outer race 23c, and the sliding contact portion between the lip 25a and the outer peripheral surface of the outer race 23c can be suitably cooled.

In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
In the above-described embodiment, the protruding portion 41 is formed in an arc shape on the wall surface 40. However, when a sufficient cooling effect is obtained, for example, on the wall surface 40 at the uppermost portion in the vertical direction of the outer race 23c. It is also possible to adopt a structure in which the protruding portion is formed only at the corresponding portion.

  In the above embodiment, the protruding portion 41 is formed at a position facing the side surface of the outer race 23c of the one-way clutch 23, and the lubricating oil is directed to the side surface of the outer race 23c. On the other hand, for example, the projecting portion is formed at a position facing the sliding contact portion between the lip 25a and the outer peripheral surface of the outer race 23c, and a structure for supplying a larger amount of lubricating oil to the outer peripheral surface of the outer race 23c is adopted. You can also. According to such a configuration, an excessive increase in the temperature of the seal member 25 due to sliding heat generation can be suppressed by supplying lubricating oil to the sliding portion of the lip 25a and cooling the sliding portion. Further, even if foreign matter such as metal powder or lubricating oil sludge adheres to the sliding portion of the lip 25a, it can be washed away by the lubricating oil supplied to the sliding portion, and such foreign matter adheres. As a result, an increase in sliding resistance at the sliding portion of the lip 25a can also be suppressed. Further, when the deformation of the lip 25a is suppressed and the sliding heat generation between the lip 25a and the outer race 23c due to the deformation is suppressed to an allowable level or less, the protruding portion is formed at a position facing the lip 25a of the seal member 25. The lubricating oil may be supplied directly to the lip 25a.

  In the above embodiment, the ring gear 24 is formed with six through holes, but the ring gear 24 is formed with, for example, five or seven, any number of through holes. Also good. Further, for example, if the starting device is not isolated from the seal member 25 and the cylinder block 2, there is no need to form a through hole in the ring gear 24, and the lubricating oil is sealed by the protruding portion formed on the wall surface 40. It can be supplied directly to the 25 side.

  In the above-described embodiment, a structure is adopted in which the protruding portion formed on the wall surface 40 is bent in a cross-sectional arc shape so as to be close to the seal member 25. On the other hand, when sufficient lubricating oil can be directed to the seal member 25 side, for example, as shown by the broken line in FIG. It is also possible to adopt a structure having the following shape.

  In the above embodiment, the protrusion 41 is formed on the wall surface 40 of the cylinder block 2 so that the lubricating oil is directed to the seal member 25 side. However, for example, the ring gear 24 protrudes to the wall surface 40 side. It is also possible to adopt a configuration in which a portion is formed and the lubricating oil flowing in the radial direction of the ring gear 24 is directed toward the seal member 25 by the protruding portion.

  In the above embodiment, the seal member 25 is provided between the ring gear 24 and the outer race 23c, and is fixed to the ring gear 24 and has a slidable lip 25a on the outer peripheral surface of the outer race 23c of the one-way clutch 23. I am doing so. On the other hand, a seal member of another aspect, such as a seal member having a lip that is fixed to the outer race 23c between the ring gear 24 and the outer race 23c and that can rotate and slide on the outer peripheral surface of the ring gear 24. The present invention can also be applied to a lubricating oil supply system provided with In short, the present invention is applied to any lubricating oil supply system that is fixed to one of the ring gear 24 and the rotary member that rotates integrally with the output shaft 10 and that has a seal member having a lip that can rotate and slide on the other. be able to.

1 is a partial cross-sectional view showing a configuration of an internal combustion engine starter and a lubricating oil supply system of the starter according to an embodiment. The expanded sectional view which shows the lubricating oil supply aspect of this embodiment. The side view which shows the structure of the ring gear of this embodiment. The fragmentary sectional view which shows the structure of the starting device of the conventional internal combustion engine, and the lubricating oil supply system of the starting device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Cylinder block, 3 ... Oil pan, 4 ... Dam member, 10 ... Output shaft, 20 ... Motor for starting, 20a ... Output shaft, 20b ... Pinion gear, 21 ... Bearing, 22 ... Connecting member, 23 ... One-way clutch, 23c ... Outer race, 24 ... Ring gear, 24a ... Gear, 24b ... Through hole, 25 ... Seal member, 25a ... Lip, 26 ... Seal member, 26a ... Lip, 30 ... Hydraulic pump, 31 ... Supply passage, 40 ... Wall surface DESCRIPTION OF SYMBOLS 41 ... Projection part 50 ... Introduction passage 102 ... Cylinder block 103 ... Oil pan 110 ... Output shaft 120 ... Motor for starting 120a ... Output shaft 120b ... Pinion gear 121 ... Bearing 122 ... Connecting member 123 ... One-way clutch, 123a ... Inner race, 123b ... Sprag, 123c ... Outer race, 124 ... Ring gear , 124a ... gear, 125 ... sealing member, 125a ... lip 126 ... sealing member, 126a ... lip 130 ... hydraulic pump.

Claims (7)

A ring gear is supported at the end of the output shaft by a bearing provided at the end of the output shaft supported by the engine body of the internal combustion engine, and the output shaft and the ring gear are supported by the ring gear. Is connected through a one-way clutch that only allows transmission of torque to the output shaft, and the ring gear is rotated by a starting motor until the internal combustion engine is in a state where it can operate independently, and the torque is transmitted to the one-way clutch. A lubricating oil supply system for supplying lubricating oil to a starting device for starting an internal combustion engine by transmitting to the output shaft from
A portion of the lubricating oil supplied between the output shaft and the engine main body through the lubricating oil supply passage of the engine main body and flowing out between the output shaft and the engine main body is transferred to at least the bearing and the one-way clutch. An annular ring is provided between the ring gear and the rotating member that rotates integrally with the output shaft so that the lubricating oil supplied to the one side is restricted in the radial direction as the output shaft rotates. The engine main body directs lubricating oil that flows out between the output shaft and the engine main body and flows in the radial direction as the output shaft rotates to the seal member side. A lubricating oil supply system, characterized in that a directing means is provided. The lubricating oil supply system according to claim 1,
The wall surface of the engine body that faces the ring gear defines a part of an introduction passage that guides a part of the lubricating oil supplied between the output shaft and the engine body to the seal member side, The directing means is a projecting portion that projects a portion corresponding to the most downstream portion of the introduction passage on the wall surface of the engine body so as to be close to the seal member. The lubricating oil supply system according to claim 2,
The lubricating oil supply system according to claim 1, wherein a portion of the protruding portion protruding so as to be close to the seal member is bent in a circular arc shape. In the lubricating oil supply system according to claim 2 or 3,
The protrusion is formed by extending in an arc shape corresponding to the shape of the seal member. In the lubricating oil supply system according to any one of claims 1 to 4,
The seal member and the engine body are separated from each other by the ring gear, and a through hole is formed in a portion of the ring gear that faces the seal member, and the directing means is connected to the seal member side through the through hole. Lubricating oil supply system characterized by directing lubricating oil to In the lubricating oil supply system according to any one of claims 1 to 5,
The seal member is fixed to the ring gear and has a lip that can rotate and slide on an outer peripheral surface of an outer race of the one-way clutch that rotates integrally with the output shaft.
The directing means is formed so as to direct the lubricating oil to the outer peripheral surface of the outer race with which the lip is slidably contacted. In the lubricating oil supply system according to any one of claims 1 to 5,
The seal member is fixed to the ring gear and has a lip that can rotate and slide on an outer peripheral surface of an outer race of the one-way clutch that rotates integrally with the output shaft.
The directing means is formed so as to direct the lubricating oil to the side surface of the outer race.

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