JP2007030126A - Mechanism for transmitting rotating force for starting internal combustion engine, and method for assembling mechanism for transmitting rotating force for starting internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily fit a rotary member into a ring-like sealing member of a mechanism for transmitting a rotary force for starting an internal combustion engine without axial eccentricity. <P>SOLUTION: The relationship between a distance Da from a start portion Pa1 on a restrained surface of a ring gear 12 to a contact start portion Pa2, and a distance Db from the start portion Pa1 on a restraining surface to the contact point Pb of a second oil sealing member 26 satisfies a formula Da<Db. Thereby, the outer periphery 12e of a cylindrical step part 12a comes into contact with the second oil sealing member 26 without causing axial eccentricity, and the ring gear 12 is moved and arranged to a regular position as it is. Accordingly, a sub-sealing rip 26b is not reversed or deformed by the axial eccentricity. This is the same with an outer race supporting plate assembled to the ring gear 12. An oil sealing property of the oil sealing member is not deteriorated thereby. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention transmits the rotational force of the starter motor to the crankshaft via the rotation transmission mechanism, and between the internal combustion engine body and the rotation transmission mechanism or within the rotation transmission mechanism. The present invention relates to an internal combustion engine starting rotational force transmission mechanism provided with a ring-shaped seal member that seals oil supplied from the side.

  In an internal combustion engine for a vehicle or the like, a configuration in which various rotation transmission mechanisms are arranged between the starting motor and the crankshaft as an internal combustion engine starting rotational force transmission mechanism for transmitting the rotational force from the starting motor to the crankshaft. Is known (see, for example, Patent Document 1).

In such an internal combustion engine starting torque transmission mechanism, a gear meshing mechanism and a one-way clutch are provided, and oil is supplied from the internal combustion engine side for lubrication. In particular, in the technique of Patent Document 1, an oil seal is provided between the gear meshing mechanism and the stator in order to prevent oil from entering the starter motor side.
JP 2003-83216 A (page 3, FIG. 1)

  In addition to preventing the oil from entering the starter motor, when the oil is supplied from the internal combustion engine side to the internal mechanism of the internal combustion engine start rotational force transmission mechanism such as a one-way clutch or a bearing, the internal combustion engine start rotational force transmission mechanism It is also necessary to prevent oil leakage from the inside to the outside such as the transmission side. However, Patent Document 1 does not disclose the technology of this point.

  When performing oil leakage prevention from the inside to the outside of the internal combustion engine starting rotational force transmission mechanism, between the rotating member and the internal combustion engine constituting the internal combustion engine starting rotational force transmission mechanism, or between the rotational members. Also, it is necessary to perform oil sealing with a ring-shaped sealing member.

  However, if an oil seal is to be carried out using such a ring-shaped seal member, the seal part such as the seal lip of the ring-shaped seal member will be reversed unless it is carefully operated when assembling the internal combustion engine starting torque transmission mechanism. The oil sealability may be deteriorated due to deformation or deformation. That is, a rotating member that slides on the seal portion of the ring-shaped seal member is fitted. However, in this fitting operation, if shaft eccentricity occurs between the ring-shaped seal member that has already been arranged and the rotating member, a flexible seal portion such as a seal lip is partially caused by axial friction or collision during fitting. Phenomenon that is reversed or deformed.

  An object of the present invention is to make it possible to easily perform the operation of fitting a rotating member into a ring-shaped seal member in an internal combustion engine starting rotational force transmission mechanism without causing shaft eccentricity.

In the following, means for achieving the above object and its effects are described.
The method of assembling the internal combustion engine starting rotational force transmission mechanism according to claim 1 transmits the rotational force of the starting motor to the crankshaft via the rotational transmission mechanism, and between the internal combustion engine body and the rotational transmission mechanism. A method for assembling an internal combustion engine starting rotational force transmission mechanism including a ring-shaped seal member that seals oil supplied from the internal combustion engine main body side, the internal combustion engine main body having the ring-shaped seal member disposed thereon, When assembling the rotation transmission mechanism, the rotation member that forms the seal sliding surface in the rotation transmission mechanism is rotated by the regulating surface provided on the internal combustion engine side and passes through the normal seal sliding position. After restricting only the direction movement, the rotating member is moved to bring the seal sliding surface into contact with the seal portion of the ring-shaped seal member.

  The rotating member having the seal sliding surface as described above is properly sealed by the regulating surface provided on the internal combustion engine side before the seal sliding surface is brought into contact with the seal portion of the ring-shaped seal member. It is restricted only to movement in the direction of the rotation axis passing through the position. Therefore, at the time of assembling, the rotating member can be accurately brought into contact with the proper position without being eccentric with respect to the ring-shaped seal member, and the fitting operation can be completed.

  In this way, the fitting operation of the rotating member to the ring-shaped oil seal can be easily performed without causing shaft eccentricity, so that the seal portion such as the seal lip provided on the ring-shaped seal member is not reversed or deformed. The internal combustion engine starting rotational force transmission mechanism can be assembled.

  The internal combustion engine starting rotational force transmission mechanism assembling method according to claim 2 transmits the rotational force of the starting motor to the crankshaft via the rotational transmission mechanism, and supplies the rotational force from the internal combustion engine body inside the rotational transmission mechanism. A method of assembling an internal combustion engine starting rotational force transmission mechanism provided with a ring-shaped seal member that seals against the oil to be produced, wherein the rotation-transmission mechanism is mounted on the internal combustion engine main body side and the ring-shaped seal member is disposed. When assembling the internal combustion engine starting rotational force transmission mechanism to the internal combustion engine by combining the rotary member forming the seal sliding surface with some members, the rotary member is provided on the internal combustion engine side. After the restriction surface restricts only the movement in the rotation axis direction passing through the normal seal sliding position, the ring-shaped seal member is moved by moving the rotation member. And wherein the contacting the seal sliding surface seal site.

  The same applies to the case where the ring-shaped seal member for sealing the oil supplied from the internal combustion engine main body side is provided inside the rotation transmission mechanism. That is, before the seal sliding surface is brought into contact with the seal portion of the ring-shaped seal member disposed on a part of the rotation transmission mechanism, the rotating member having the seal sliding surface is provided on the internal combustion engine side. The restricted surface is restricted only to movement in the rotation axis direction passing through the normal seal sliding position. Some members of the rotation transmission mechanism are attached to the internal combustion engine main body first. Therefore, at the time of assembling, the rotating member can be accurately brought into contact with the proper position without being eccentric with respect to the ring-shaped seal member, and the fitting operation can be completed.

  In this way, the fitting operation of the rotating member to the ring-shaped oil seal can be easily performed without causing shaft eccentricity, so that the seal portion such as the seal lip provided on the ring-shaped seal member is not reversed or deformed. The internal combustion engine starting rotational force transmission mechanism can be assembled.

  In the internal combustion engine starting rotational force transmission mechanism assembling method according to claim 3, in claim 1 or 2, the restriction surface is an outer peripheral surface of a crankshaft or an outer peripheral surface of a bearing disposed on the outer peripheral surface, The rotating member is fitted to the crankshaft or the bearing, and has a center hole coaxial with the seal sliding surface, and a rotating shaft direction between the seal sliding surface and the center hole on the rotating member In the assembling, at least a part of the center hole is fitted to the crankshaft or the bearing, and then the seal sliding surface is in contact with the seal portion of the ring-shaped seal member. It is characterized by being.

  Thus, due to the arrangement relationship in the rotation axis direction between the seal sliding surface and the center hole, before the seal sliding surface comes into contact with the seal portion of the ring-shaped seal member, at least a part of the center hole is a crankshaft. Alternatively, by engaging with the bearing, the rotating member is restricted only to movement in the rotation axis direction passing through the normal seal sliding position.

  With such a simple arrangement, the fitting operation of the rotating member into the ring-shaped oil seal can be prevented from causing shaft eccentricity. Therefore, the internal combustion engine starting rotational force transmission mechanism can be assembled without causing reversal or deformation of a seal portion such as a seal lip provided on the ring-shaped seal member.

  The internal combustion engine starting rotational force transmission mechanism assembling method according to claim 4, wherein, in any one of claims 1 to 3, the ring-shaped seal is formed on the rotating member from a restriction start portion by the restricting surface in the rotation axis direction. By making the distance to the contact start site of the member to the seal site smaller than the distance from the start site of the restriction surface to the seal site of the ring-shaped seal member in the rotation axis direction on the internal combustion engine side, The rotating member can be restricted only to movement in the rotation axis direction passing through a normal seal sliding position before contacting the seal portion of the ring-shaped seal member.

  By setting the positional relationship between the regulation start site and the contact start site of the rotating member in such a relationship, the rotating member is properly sealed before the seal sliding surface contacts the seal site of the ring-shaped seal member. Only the movement in the rotational axis direction passing through the moving position is restricted.

  Therefore, with such a simple configuration, the operation of fitting the rotating member into the ring-shaped oil seal can be prevented from causing shaft eccentricity. In this way, the internal combustion engine starting rotational force transmission mechanism can be assembled without causing reversal or deformation of a seal portion such as a seal lip provided on the ring-shaped seal member.

  The internal combustion engine starting rotational force transmission mechanism assembling method according to claim 5 is the method of assembling the internal combustion engine starting rotational force transmission mechanism according to claim 3 or 4, wherein the internal combustion engine starting rotational force transmission mechanism uses a pinion gear rotated by a starting motor as a ring gear as the rotating member. The ring gear is rotated by meshing, and a one-way clutch is provided between the ring gear and the crankshaft side member, thereby transmitting a rotational force in one direction from the ring gear to the crankshaft and transmitting a reverse rotational force. The seal sliding surface formed on the ring gear is prevented by fitting at least a part of the center hole of the ring gear to the outer peripheral surface of the bearing provided on the outer peripheral surface of the crankshaft. Before contacting the seal part of the member, connect the ring gear to a regular seal with the outer peripheral surface of the bearing as the regulating surface. Characterized by regulating only the rotation axis direction transfer through the sliding position.

  Even in the internal combustion engine starting rotational force transmission mechanism having such a configuration, before the seal sliding surface formed on the ring gear comes into contact with the seal portion of the ring-shaped seal member, the outer peripheral surface of the bearing is used as a restriction surface, Only the movement in the rotation axis direction that passes through the normal seal sliding position can be restricted. As a result, the fitting operation of the ring gear to the ring-shaped oil seal can be easily performed without causing shaft eccentricity, so that the seal portion such as the seal lip provided on the ring-shaped seal member is not reversed or deformed. .

  The internal combustion engine starting rotational force transmission mechanism assembling method according to claim 6 is the method of assembling the internal combustion engine starting rotational force transmission mechanism according to claim 3 or 4, wherein the internal combustion engine starting rotational force transmission mechanism is engaged with a ring gear by engaging a pinion gear rotated by a starting motor. And a one-way clutch is provided between the ring gear and the crankshaft side member as the rotating member, thereby transmitting a rotational force in one direction from the ring gear to the crankshaft, and transmitting a rotational force in the reverse direction. At least a part of the center hole of the crankshaft side member is fitted to the outer peripheral surface of the crankshaft with the ring gear having the ring-shaped seal member disposed on the internal combustion engine body side. As a result, the seal sliding surface formed on the crankshaft side member contacts the seal portion of the ring-shaped seal member. Before, the crankshaft side member, characterized in that it restricted to only the rotation axis direction transfer through the seal sliding position of the normal to the outer peripheral surface of the crank shaft as the regulating surface.

  Also in the internal combustion engine starting rotational force transmission mechanism having such a configuration, the outer peripheral surface of the crankshaft is used as a regulating surface before the seal sliding surface formed on the crankshaft side member contacts the seal portion of the ring-shaped seal member. The crankshaft side member can be restricted only to movement in the rotation axis direction passing through the normal seal sliding position. As a result, the operation of fitting the crankshaft side member into the ring-shaped oil seal can be easily performed without causing shaft eccentricity, so that a seal portion such as a seal lip provided on the ring-shaped seal member is inverted or deformed. There is nothing.

  The internal combustion engine starting rotational force transmission mechanism according to claim 7 transmits the rotational force of the starting motor to the crankshaft via the rotational transmission mechanism, and between the internal combustion engine body and the rotational transmission mechanism. An internal combustion engine starting rotational force transmission mechanism including a ring-shaped seal member that seals against oil supplied from a main body side, wherein the rotation transmission mechanism is in sliding contact with a seal portion of the ring-shaped seal member. A rotating member having a seal sliding surface that performs oil sealing, and the rotating member is only moved in the direction of the rotating shaft passing through a normal seal sliding position by contact with a regulating surface provided on the internal combustion engine side. And having a regulated surface to be regulated, in the direction of the rotation axis from the start site of the regulated surface to the contact start site on the seal sliding surface with respect to the seal site of the ring-shaped seal member Distance, characterized in that it is smaller than the distance in the rotation axis direction from the start site of the regulating surface of the internal combustion engine side to the seal portion of the ring-shaped seal member.

  Thus, the rotation member has a distance in the rotation axis direction from the start part of the regulated surface to the contact start part on the seal sliding surface, and the distance from the start part of the regulation surface to the seal part on the internal combustion engine side. Has been smaller than.

  Since the internal combustion engine starting rotational force transmission mechanism is configured in this manner, when the internal combustion engine starting rotational force transmission mechanism is assembled to the internal combustion engine, the rotational member is in contact with the seal portion of the ring-shaped seal member. Therefore, the movement is restricted only to the movement in the rotation axis direction in which the start portion of the regulated surface contacts the regulating surface and passes through the normal seal sliding position.

  As a result, the internal combustion engine starting rotational force transmission mechanism is assembled to the internal combustion engine by performing the fitting operation of the rotating member on the ring-shaped oil seal without causing shaft eccentricity. For this reason, in the internal combustion engine starting rotational force transmission mechanism that has been assembled, the seal portion such as the seal lip provided on the ring-shaped seal member is not reversed or deformed. Therefore, it is possible to prevent the oil seal performance of the internal combustion engine starting rotational force transmission mechanism from being deteriorated.

  The internal combustion engine starting rotational force transmission mechanism according to claim 8 transmits the rotational force of the starting motor to the crankshaft via the rotational transmission mechanism and is supplied from the internal combustion engine main body side within the rotational transmission mechanism. An internal combustion engine starting rotational force transmission mechanism including a ring-shaped seal member that seals against oil, wherein the rotation transmission mechanism includes a first rotation member on which the ring-shaped seal member is disposed, and a ring-shaped seal member A second rotating member having a seal sliding surface that comes into contact with the seal portion, and the second rotating member rotates through a normal seal sliding position by contact with a regulating surface provided on the internal combustion engine side. It has a regulated surface that is restricted only by axial movement, and from the start site of the regulated surface to the contact start site on the seal sliding surface with respect to the seal site of the ring-shaped seal member. Distance in the rotation axis direction of, characterized in that it is smaller than the distance in the rotation axis direction from the start site of the regulating surface of the internal combustion engine side to the seal portion of the ring-shaped seal member.

  As described above, the second rotating member has a distance in the rotation axis direction from the start portion of the regulated surface to the contact start portion on the seal sliding surface from the start portion of the regulating surface on the internal combustion engine side to the first rotating member. It is made smaller than the distance to the seal | sticker site | part of the ring-shaped seal member arrange | positioned in.

  With this configuration, when the internal combustion engine starting rotational force transmission mechanism is assembled to the internal combustion engine, the second rotating member contacts the seal portion of the ring-shaped seal member disposed on the first rotating member. Before starting, the start portion of the regulated surface comes into contact with the regulating surface and is restricted only to the movement in the rotation axis direction passing through the normal seal sliding position.

  As a result, the internal combustion engine starting rotational force transmission mechanism is assembled to the internal combustion engine by performing the fitting operation of the second rotary member to the ring-shaped oil seal on the first rotary member without causing shaft eccentricity. Become. For this reason, in the internal combustion engine starting rotational force transmission mechanism that has been assembled, the seal portion such as the seal lip provided on the ring-shaped seal member is not reversed or deformed. Therefore, it is possible to prevent the oil seal performance of the internal combustion engine starting rotational force transmission mechanism from being deteriorated.

  In the internal combustion engine starting rotational force transmission mechanism according to claim 9, the rotational transmission mechanism according to claim 7 or 8 is provided on the crankshaft and a ring gear that receives rotational force from a pinion gear rotated by a starting motor. Rotating force in one direction by the starting motor from the ring gear to the crankshaft side member is transmitted between the crankshaft side member, the ring gear and the crankshaft side member, and transmission in the reverse direction is blocked. The ring gear corresponds to the rotating member of claim 7 or the first rotating member of claim 8, and the crankshaft side member corresponds to the second rotating member of claim 8. To do.

  The internal combustion engine starting torque transmission mechanism can be configured using the ring gear and the crankshaft side member as described above. Even in such a configuration, the fitting operation of the rotating member or the second rotating member to the ring-shaped seal member can be easily performed without causing shaft eccentricity, and without causing reversal or deformation of the seal portion such as the seal lip. It can be assembled to an internal combustion engine. Therefore, it is possible to provide an internal combustion engine starting rotational force transmission mechanism having a sufficiently high oil sealability.

[Embodiment 1]
FIG. 1 shows an internal combustion engine starting rotational force transmission mechanism of an internal combustion engine for a vehicle, and shows a cross-sectional view around the rear side of the internal combustion engine that outputs to the transmission side. In FIG. 1, the upper half of the rotation axis C, which is the central axis, is shown. In the internal combustion engine starting rotational force transmission mechanism, only the cut surface is shown except for the cylinder block 2 (corresponding to the internal combustion engine body) and the crankshaft 6.

  Below the rear end of the cylinder block 2 is disposed a rear end of the crankshaft 6 that is rotatably supported by a ladder beam. A flywheel 8, an outer race support plate 10 (corresponding to a crankshaft side member), and a ring gear 12 are attached to the rear end of the crankshaft 6.

  The flywheel 8 that shows the upper half in FIG. 1 has a substantially disk shape with a circular opening at the center, and the side opposite to the side in contact with the outer race support plate 10 is connected to the transmission. A clutch disk 8a is attached in a ring shape as a part of the clutch mechanism for transmitting the rotational force between them. The clutch mechanism may be formed separately from the flywheel 8.

  The outer race support plate 10 shown in the upper half in FIG. 1 is formed in a circular flat plate shape having an open center portion, and the flywheel 8 and the rear end surface 6a of the crankshaft 6 around the center opening. It is fixed by bolt fastening. Accordingly, the outer race support plate 10 is configured to rotate in conjunction with the crankshaft 6 together with the flywheel 8.

  The ring gear 12 shown in the upper half in FIG. 1 is a disk having a large opening at the center and bending portions (cylindrical stepped portion 12a and bending portion 12b) in the radial direction. An inner race 16 of the one-way clutch 14 is provided in a flange shape, and a gear portion 12c is provided in a ring shape on the outer peripheral portion. The ring gear 12 is attached to the outer periphery of the crankshaft 6 via a bearing 18 on the side of the inner race 16 opposite to the one-way clutch 14, that is, on the center side. For this reason, when the one-way clutch 14 is in the released state, the ring gear 12 is independent of the rotation of the crankshaft 6 and can freely rotate.

  The bearing 18 is attached to the outer periphery of the crankshaft 6 by press fitting. The inner race 16 of the one-way clutch 14 is fitted to the outer periphery of the outer race 18a of the bearing 18 up to the thrust bearing portion 18b.

  The gear portion 12c of the ring gear 12 is always meshed with the pinion gear of the starter motor below the crankshaft 6, and the ring gear 12 rotates by receiving a rotational force from the starter motor via the pinion gear.

  An outer race 22 is provided on the outer peripheral portion of the outer race support plate 10 so as to face the inner race 16 attached to the center opening portion of the ring gear 12. A cage 14b having sprags 14a is disposed between the inner race 16 and the outer race 22, so that a one-way clutch 14 is configured between the ring gear 12 and the outer race support plate 10. Therefore, in the inner race 16, the bearing 18 is disposed on the inner peripheral surface 16a side of the center hole, and the one-way clutch 14 is configured on the outer peripheral surface 16b side opposite to the inner peripheral surface 16a.

  The one-way clutch 14 configured as described above connects the outer race support plate 10 and the ring gear 12 when rotating in one direction to transmit the torque of the starting motor from the ring gear 12 side to the outer race support plate 10. Engage state. As a result, the starting motor can rotate the crankshaft 6.

  When the rotation of the outer race support plate 10 interlocked with the crankshaft 6 by the output of the internal combustion engine becomes faster than the rotation of the ring gear 12 by the starter motor when the internal combustion engine starts operation, the rotation on the ring gear 12 side is supported by the outer race. The rotation is relative to the plate 10 in the opposite direction. For this reason, the one-way clutch 14 is in a disengaged state, and even when the pinion gear and the ring gear 12 are always meshed, the starting motor can be stopped after the internal combustion engine is started, and over-rotation of the starting motor can be prevented.

  In this internal combustion engine, engine oil is supplied as indicated by an arrow through the oil passage in the cylinder block 2 or the crankshaft 6 especially for lubrication of the bearing 18 and the one-way clutch 14. However, since the outer race support plate 10 and the ring gear 12 are disposed with the one-way clutch 14 therebetween, it is necessary to prevent oil leakage during this period. Furthermore, it is necessary to prevent oil leakage between the ring gear 12 and the cylinder block 2.

  For this purpose, a ring-shaped first oil seal member 24 (corresponding to a ring-shaped seal member) is disposed between the outer race 22 of the one-way clutch 14 and the cylindrical step portion 12a of the ring gear 12. The first oil seal member 24 is fixed to the ring gear 12 side by fitting to the inner peripheral surface 12d of the cylindrical step portion 12a. As a result, the main seal lip 24 a and the sub seal lip 24 b as seal portions formed on the inner peripheral side of the first oil seal member 24 slide on the seal sliding surface 22 a that is the outer peripheral surface of the outer race 22. Contact is possible. Thus, the first oil seal member 24 performs an oil seal between the outer race support plate 10 and the ring gear 12.

  Further, a second oil seal member 26 (corresponding to a ring-shaped seal member) having a diameter larger than that of the first oil seal member 24 is provided on the opposite side (outside) of the first oil seal member 24 across the cylindrical step portion 12a. Has been placed. The second oil seal member 26 is mainly on the inner peripheral surface 2b of the arc-shaped seal fitting portion 2a of the cylinder block 2 above the crankshaft 6, and mainly on the oil pan (internal combustion engine) below the crankshaft 6. It is fixed at the position shown in the figure by fitting to the inner peripheral surface of the rear end (corresponding to the main body). Thus, the main seal lip 26a and the sub seal lip 26b, which are two seal portions formed on the inner peripheral side of the second oil seal member 26, are slidable on the outer peripheral surface 12e of the cylindrical step portion 12a. In contact. Thus, an oil seal between the ring gear 12 and the cylinder block 2 is executed.

The assembly procedure of the internal combustion engine starting rotational force transmission mechanism described above is as follows.
First, as shown in FIG. 2, the bearing 18 is press-fitted into the crankshaft 6, and the second oil seal member 26 is fitted into the arc-shaped seal fitting portion 2 a of the cylinder block 2 and the rear end portion of the oil pan. . Then, the ring gear 12 is moved along the rotation axis C as indicated by an arrow. Thus, the inner peripheral surface 16a of the inner race 16 formed on the center side of the ring gear 12 is fitted to the outer peripheral surface 18c of the outer race 18a provided on the bearing 18, so that the cylindrical step portion provided on the ring gear 12 is provided. The outer peripheral surface 12 e of 12 a is brought into contact with the second oil seal member 26.

  A distance Da in the direction of the rotation axis C from the start portion Pa1 of the inner peripheral surface 16a of the inner race 16 on the ring gear 12 side to the contact start portion Pa2 of the outer peripheral surface 12e of the cylindrical stepped portion 12a is defined as a distance Da. A distance in the direction of the rotation axis C from the start portion Pb1 of the outer peripheral surface 18c of the outer race 18a on the bearing 18 side to the contact point Pb2 of the secondary seal lip 26b of the second oil seal member 26 is defined as a distance Db. The relationship between the distance Da and the distance Db is Da <Db.

  Therefore, when the ring gear 12 is assembled, before the outer peripheral surface 12e of the cylindrical step portion 12a provided on the ring gear 12 contacts the sub seal lip 26b of the second oil seal member 26, the inner peripheral surface as shown in FIG. The start part Pa1 of 16a abuts on the start part Pb1 of the outer peripheral surface 18c. Thereafter, as shown in FIG. 4, the inner peripheral surface 16a (corresponding to the regulated surface) of the inner race 16 is engaged with the outer peripheral surface 18c (corresponding to the regulating surface) of the outer race 18a on the bearing 18 side, and the ring gear 12 The movement is restricted only in the direction of the rotation axis C passing through the normal seal sliding position shown in FIG.

  Therefore, as shown in FIG. 5, when the outer peripheral surface 12e of the cylindrical step portion 12a and the sub seal lip 26b of the second oil seal member 26 are in contact, the second oil seal member 26 and the ring gear 12 are not eccentric. .

FIG. 6 shows a state where the first oil seal member 24 is further fitted to the inner peripheral surface 12d of the cylindrical stepped portion 12a after the ring gear 12 is completely assembled through the process of FIG.
The outer race support plate 10 is assembled to this state. First, the outer race support plate 10 is moved along the rotation axis C as indicated by an arrow. As a result, the inner peripheral surface 10a of the center hole formed on the center side of the outer race support plate 10 is fitted to the outer peripheral surface 6b of the crankshaft 6, and the outer peripheral surface of the outer race 22 provided on the outer race support plate 10 The seal sliding surface 22a is brought into contact with the first oil seal member 24.

  A distance in the direction of the rotation axis C from the start site Pc1 of the inner peripheral surface 10a on the outer race support plate 10 side to the contact start site Pc2 of the seal sliding surface 22a in the outer race 22 is defined as a distance Dc. A distance in the direction of the rotation axis C from the start site Pd1 of the outer peripheral surface 6b of the crankshaft 6 to the contact point Pd2 of the sub seal lip 24b of the first oil seal member 24 is defined as a distance Dd. The relationship between the distance Dc and the distance Dd is Dc <Dd.

  Therefore, before the seal sliding surface 22a of the outer race 22 comes into contact with the auxiliary seal lip 24b of the first oil seal member 24, the start site Pc1 of the inner peripheral surface 10a of the outer race support plate 10 is a crankshaft as shown in FIG. 6 is in contact with the start site Pd1 of the outer peripheral surface 6b. Thereafter, as shown in FIG. 8, the inner peripheral surface 10a (corresponding to the regulated surface) on the outer race support plate 10 side is fitted to the outer peripheral surface 6b (corresponding to the restricting surface) of the crankshaft 6, and the outer race support plate is placed. No. 10 is restricted only to movement in the direction of the rotation axis C passing through the normal seal sliding position shown in FIG.

  Therefore, as shown in FIG. 9, when the seal sliding surface 22a of the outer race 22 and the auxiliary seal lip 24b of the first oil seal member 24 are in contact with each other, the first oil seal member 24 and the outer race support plate 10 have an axial eccentricity. It has not occurred.

  Then, as shown in FIG. 10, with the outer race support plate 10 fully assembled, the flywheel 8 is disposed so as to sandwich the outer race support plate 10 with the rear end surface 6a of the crankshaft 6, and the bolt Fastened at B. As a result, the assembly of the internal combustion engine starting torque transmission mechanism is completed, and the clutch mechanism is assembled to the flywheel 8 to complete the configuration shown in FIG.

  In the configuration described above, the rotation transmission mechanism of the claims corresponds to a combination of the outer race support plate 10, the ring gear 12, and the one-way clutch 14. The outer race support plate 10 and the ring gear 12 each correspond to a rotating member. Of these, the outer race support plate 10 corresponds to a second rotating member, and the ring gear 12 corresponds to a first rotating member.

According to the first embodiment described above, the following effects can be obtained.
(I). As described above, the relationship between the distance Da in the direction of the rotation axis C from the start site Pa1 to the contact start site Pa2 and the distance Db from the start site Pb1 to the contact point Pb2 is Da <Db. From this, the contact of the outer peripheral surface 12e of the cylindrical step portion 12a with the sub seal lip 26b of the second oil seal member 26 is made in a state where the axis of the ring gear 12 coincides with the axis of the second oil seal member 26. The That is, the outer peripheral surface 12e of the cylindrical stepped portion 12a contacts the sub seal lip 26b without causing shaft eccentricity. In this state, the ring gear 12 can be moved to a proper position and arranged.

  Therefore, the reversal of the sub seal lip 26b caused by the shaft eccentricity, that is, the tip of the sub seal lip 26b does not face the cylinder block 2 side does not occur. Alternatively, the sub seal lip 26b is not deformed. Further, the main seal lip 26a is not deformed. For this reason, the ring gear 12 can be easily assembled without deteriorating the oil sealability of the second oil seal member 26.

  (B). As described above, the relationship between the distance Dc in the direction of the rotation axis C from the start site Pc1 to the contact start site Pc2 and the distance Dd from the start site Pd1 to the contact point Pd2 is Dc <Dd. From this, the contact of the seal sliding surface 22a of the outer race 22 with the sub seal lip 24b of the first oil seal member 24 coincides with the axis of the outer race support plate 10 with respect to the axis of the first oil seal member 24. Made in the state. That is, the seal sliding surface 22a of the outer race 22 contacts the sub seal lip 24b without causing shaft eccentricity. In this state, the outer race support plate 10 can be moved and arranged to a regular position.

  Therefore, inversion and deformation of the sub seal lip 24b caused by shaft eccentricity do not occur. Further, the main seal lip 24a is not deformed. For this reason, the outer race support plate 10 can be easily assembled without deteriorating the oil sealability of the first oil seal member 24.

(C). Due to the effects (A) and (B) described above, the entire internal combustion engine starting rotational force transmission mechanism can be manufactured in a higher oil-seal state.
[Embodiment 2]
In the internal combustion engine starting rotational force transmission mechanism of the present embodiment, a ring gear 112 is rotatably supported on the crankshaft 6 by using a bush 118 shown in FIG. 11 instead of the bearing used in the first embodiment. Yes. The crankshaft 6, the flywheel 8 and the bolt B shown in FIG. 11 have the same configuration as that of the first embodiment and are denoted by the same reference numerals. The configurations of the cylinder block 102, the outer race support plate 110, the ring gear 112, the one-way clutch 114, the first oil seal member 124, and the second oil seal member 126 are basically the same as those in the first embodiment. However, the size and shape are adapted to the use of the bush 118 instead of the bearing.

  The bush 118 is as shown in FIG. 12, where (A) is a front view, (B) is a rear view, (C) is a perspective view, and (D) is a plan view. Here, the bush 118 is formed integrally with a short cylindrical base portion 118a and a flange portion 118b formed at one end portion. Further, a large number of continuous grooves 118c are formed from the inner peripheral surface 118d side of the base portion 118a to the flange portion 118b.

  The bush 118 is press-fitted and fixed to the inner peripheral surface of the inner race 116 provided on the center side of the ring gear 112 with the flange portion 118b positioned rearward. When the inner peripheral surface 118 d of the bush 118 slides with the outer peripheral surface 6 c of the large-diameter portion of the crankshaft 6, the ring gear 112 is disposed so as to be rotatable with respect to the crankshaft 6.

  In a state where the ring gear 112 is assembled to the internal combustion engine starting rotational force transmission mechanism, the groove 118c formed in the base portion 118a of the bush 118 is different from the oil discharge hole 102d branched from the oil passage 102c in the cylinder block 102. , At the same position in the radial direction. For this reason, oil can be introduced into one of the grooves 118c by oil discharge from the oil discharge hole 102d. Therefore, lubrication between the bush 118 and the crankshaft 6 and oil to the one-way clutch 114 side through the groove 118c are possible. Supply. The opening width of the oil discharge hole 102d is set to a size that can always supply oil to any of the grooves 118c even when the ring gear 112 rotates.

The assembly procedure of the internal combustion engine starting rotational force transmission mechanism described above is as follows.
First, as shown in FIG. 13, the second oil seal member 126 is fitted into the arc-shaped seal fitting portion 102 a of the cylinder block 102. Further, a bush 118 is fitted to the inner race 116 of the ring gear 112. Then, the ring gear 112 is moved along the rotation axis C as indicated by the arrow. As a result, the inner peripheral surface 118 d of the bush 118 attached to the inner race 116 of the ring gear 112 is slidably fitted to the outer peripheral surface 6 c of the crankshaft 6, and a cylindrical stepped portion 112 a provided on the ring gear 112. The outer peripheral surface 112e is brought into contact with the second oil seal member 126.

  A distance De in the direction of the rotation axis C from the start site Pe1 of the inner peripheral surface 118d of the bush 118 on the ring gear 112 side to the contact start site Pe2 of the outer peripheral surface 112e of the cylindrical stepped portion 112a is a distance De. A distance in the direction of the rotation axis C from the start portion Pf1 of the outer peripheral surface 6c of the crankshaft 6 to the contact point Pf2 of the sub seal lip 126b of the second oil seal member 126 is defined as a distance Df. The relationship between the distance De and the distance Df is De <Df. Here, the distance De from the start site Pe1 to the contact start site Pe2 is De <0 because the start site Pe1 is ahead of the contact start site Pe2.

  Therefore, when the ring gear 112 is assembled, before the outer peripheral surface 112e of the cylindrical step 112a provided on the ring gear 112 contacts the sub seal lip 126b of the second oil seal member 126, the inner peripheral surface 118d of the bush 118 is formed. The start site Pe1 contacts the start site Pf1 of the outer peripheral surface 6c. Thereafter, the inner peripheral surface 118d (corresponding to the regulated surface) of the bush 118 is engaged with the outer peripheral surface 6c (corresponding to the regulating surface) of the crankshaft 6, and the ring gear 112 is in the normal seal sliding state shown in FIG. Only the movement in the direction of the rotation axis C passing through the position is restricted.

  Therefore, when the outer peripheral surface 112e of the cylindrical step 112a and the sub seal lip 126b of the second oil seal member 126 are in contact with each other, the second oil seal member 126 and the ring gear 112 are not eccentric.

  FIG. 14 shows a state in which the first oil seal member 124 is further fitted to the inner peripheral surface 112d of the cylindrical step portion 112a after the ring gear 112 is completely assembled through the process of FIG.

  In this state, the outer race support plate 110 is assembled. First, the outer race support plate 110 is moved along the rotation axis C as indicated by an arrow. Thus, the inner peripheral surface 110a of the center hole formed on the center side of the outer race support plate 110 is fitted to the outer peripheral surface 6b of the crankshaft 6, and the outer peripheral surface of the outer race 122 provided on the outer race support plate 110. The seal sliding surface 122a is brought into contact with the first oil seal member 124.

  A distance in the direction of the rotation axis C from the start site Pg1 of the inner peripheral surface 110a on the outer race support plate 110 side to the contact start site Pg2 of the seal sliding surface 122a in the outer race 122 is defined as a distance Dg. A distance in the direction of the rotation axis C from the start portion Ph1 of the outer peripheral surface 6b of the crankshaft 6 to the contact point Ph2 of the sub seal lip 124b of the first oil seal member 124 is defined as a distance Dh. The relationship between the distance Dg and the distance Dh is Dg <Dh.

  Therefore, before the seal sliding surface 122a of the outer race 122 contacts the sub seal lip 124b of the first oil seal member 124, the start site Pg1 of the inner peripheral surface 110a on the outer race support plate 110 side is It abuts on the start site Ph1 of the surface 6b. Thereafter, the inner peripheral surface 110a (corresponding to the regulated surface) on the outer race support plate 110 side is fitted to the outer peripheral surface 6b (corresponding to the regulating surface) of the crankshaft 6, and the outer race support plate 110 is shown in FIG. Only the movement in the direction of the rotation axis C passing through the regular seal sliding position shown is restricted.

  Therefore, when the seal sliding surface 122a of the outer race 122 and the sub seal lip 124b of the first oil seal member 124 are in contact, the first oil seal member 124 and the outer race support plate 110 are not eccentric.

  After the outer race support plate 110 is completely assembled, the flywheel 8 is arranged so as to sandwich the outer race support plate 110 with the rear end surface 6a of the crankshaft 6 as shown in FIG. Fastened at B. As a result, the internal combustion engine starting rotational force transmission mechanism is completed, and the clutch mechanism is assembled to the flywheel 8 to complete the configuration shown in FIG.

  In the configuration described above, the rotation transmission mechanism of the claims corresponds to a combination of the outer race support plate 110, the ring gear 112 fitted with the bush 118, and the one-way clutch 114. Each of the ring gears 112 fitted with the outer race support plate 110 and the bush 118 corresponds to a rotating member. Of these, the outer race support plate 110 is a second rotating member, and the ring gear 112 fitted with the bush 118 is a first rotating member. It corresponds to.

According to the second embodiment described above, the following effects can be obtained.
(I). The relationship between the distance De from the start site Pe1 to the contact start site Pe2 and the distance Df from the start site Pf1 to the contact point Pf2, and the distance Dg from the start site Pg1 to the contact start site Pg2 and from the start site Ph1 to the contact point Ph2 The relationship with the distance Dh is the same as that in the first embodiment. Therefore, the effects (a), (b) and (c) of the first embodiment are produced.

(B). Since the bush 118 is used instead of the bearing, the radial dimension of the internal combustion engine starting rotational force transmission mechanism can be reduced, which can contribute to weight reduction and the reduction in the number of parts.
As a result, the oil seal members 124 and 126 can be reduced in diameter and the sliding speed with the seal sliding surface can be lowered, so that the durability is improved and the oil sealability is further enhanced.

Furthermore, since the groove 118c exists in the bush 118, oil can be sufficiently supplied also to the one-way clutch 114 side.
The thickness of the flange portion 118b of the bush 118 can be adjusted by machining even after being press-fitted into the inner race 116 of the ring gear 112, and the dimensional variation in the axial direction can be reduced.

[Other embodiments]
(A). In the first embodiment, the effect of the relationship of Da <Db and the effect of the relationship of Dc <Dd exist independently of each other. Therefore, it can be configured as an internal combustion engine starting rotational force transmission mechanism satisfying only the relationship of Da <Db, or can be configured as an internal combustion engine starting rotational force transmission mechanism satisfying only the relationship of Dc <Dd.

  Similarly, in the second embodiment, the same applies to the relationship of De <Df and the relationship of Dg <Dh.

FIG. 3 is a cross-sectional configuration explanatory diagram of the internal combustion engine starting rotational force transmission mechanism according to the first embodiment. The assembly explanatory drawing of the ring gear of Embodiment 1. FIG. The assembly explanatory drawing of the ring gear of Embodiment 1. FIG. The assembly explanatory drawing of the ring gear of Embodiment 1. FIG. The assembly explanatory drawing of the ring gear of Embodiment 1. FIG. The assembly explanatory drawing of the outer race support plate of Embodiment 1. FIG. The assembly explanatory drawing of the outer race support plate of Embodiment 1. FIG. The assembly explanatory drawing of the outer race support plate of Embodiment 1. FIG. The assembly explanatory drawing of the outer race support plate of Embodiment 1. FIG. The assembly explanatory drawing of the flywheel of Embodiment 1. FIG. FIG. 6 is a cross-sectional configuration explanatory diagram of an internal combustion engine starting rotational force transmission mechanism according to a second embodiment. FIG. 6 is a configuration explanatory diagram of a bush according to a second embodiment. The assembly explanatory drawing of the ring gear of Embodiment 2. FIG. The assembly explanatory drawing of the outer race support plate of Embodiment 2. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Cylinder block, 2a ... Arc-shaped seal fitting part, 2b ... Inner peripheral surface, 6 ... Crankshaft, 6a ... Rear end surface, 6b, 6c ... Outer peripheral surface, 8 ... Flywheel, 8a ... Clutch disc, 10 ... Outer Race support plate, 10a ... inner peripheral surface, 12 ... ring gear, 12a ... cylindrical stepped portion, 12b ... bent portion, 12c ... gear portion, 12d ... inner peripheral surface, 12e ... outer peripheral surface, 14 ... one-way clutch, 14a ... sprag , 14b ... cage, 16 ... inner race, 16a ... inner peripheral surface, 16b ... outer peripheral surface, 18 ... bearing, 18a ... outer race, 18b ... thrust bearing, 18c ... outer peripheral surface, 22 ... outer race, 22a ... seal slide Moving surface, 24 ... first oil seal member, 24a ... main seal lip, 24b ... sub seal lip, 26 ... second oil seal member, 26a ... main seal Lulip, 26b ... secondary seal lip, 102 ... cylinder block, 102a ... arc-shaped seal fitting portion, 102c ... oil passage, 102d ... oil discharge hole, 110 ... outer race support plate, 110a ... inner peripheral surface, 112 ... ring gear, 112a ... cylindrical stepped portion, 112d ... inner peripheral surface, 112e ... outer peripheral surface, 114 ... one-way clutch, 116 ... inner race, 118 ... bush, 118a ... base portion, 118b ... collar, 118c ... groove, 118d ... inner peripheral surface 122 ... Outer race 122a ... Seal sliding surface 124 ... First oil seal member 124b ... Sub seal lip 126 ... Second oil seal member 126b ... Sub seal lip B ... Bolt C ... Rotating shaft Pa1 ... start site, Pa2 ... contact start site, Pb1 ... start site, Pb2 ... contact point, Pc1 ... start site Pc2 ... contact start site, Pd1 ... start site, Pd2 ... contact point, Pe1 ... start site, Pe2 ... contact start site, Pf1 ... start site, Pf2 ... contact point, Pg1 ... start site, Pg2 ... contact start site, Ph1 ... Start site, Ph2 ... contact point.

Claims (9)

A ring-shaped seal member that transmits the rotational force of the starter motor to the crankshaft via the rotation transmission mechanism and seals the oil supplied from the internal combustion engine body side between the internal combustion engine body and the rotation transmission mechanism An internal combustion engine starting rotational force transmission mechanism assembly method comprising:
When assembling the rotation transmission mechanism to the internal combustion engine body in which the ring-shaped seal member is disposed,
After the rotation member forming the seal sliding surface in the rotation transmission mechanism is restricted to only the movement in the rotation axis direction passing through the normal seal sliding position by the restriction surface provided on the internal combustion engine side. A method for assembling an internal combustion engine starting rotational force transmission mechanism, wherein the rotational member is moved to bring the seal sliding surface into contact with a seal portion of the ring-shaped seal member. The internal combustion engine starter is provided with a ring-shaped seal member that transmits the rotational force of the starter motor to the crankshaft through the rotation transmission mechanism and seals the oil supplied from the internal combustion engine body inside the rotation transmission mechanism. A method of assembling the rotational force transmission mechanism,
Combining the internal combustion engine with the internal combustion engine by combining a rotary member that forms a seal sliding surface with a part of the rotation transmission mechanism that is first attached to the internal combustion engine main body and has the ring-shaped seal member disposed thereon. When assembling the starting torque transmission mechanism,
After restricting the rotation member to only the movement in the rotation axis direction passing through the normal seal sliding position by the restriction surface provided on the internal combustion engine side, the rotation member is moved to seal the ring-shaped seal member A method for assembling an internal combustion engine starting rotational force transmission mechanism, wherein the seal sliding surface is brought into contact with a portion. In Claim 1 or 2, the regulation surface is an outer peripheral surface of a crankshaft or an outer peripheral surface of a bearing disposed on the outer peripheral surface, and the rotating member is fitted to the crankshaft or the bearing, and It has a central hole coaxial with the seal sliding surface,
The positional relationship in the rotation axis direction between the seal sliding surface on the rotating member and the center hole is such that at least a part of the center hole is fitted to the crankshaft or the bearing during the assembly. The method for assembling an internal combustion engine starting rotational force transmission mechanism, wherein the seal sliding surface is set so as to contact a seal portion of the ring-shaped seal member. 4. The internal combustion engine according to claim 1, wherein a distance from a restriction start portion by the restriction surface in the rotation axis direction to a contact start portion to the seal portion of the ring-shaped seal member on the rotation member is the internal combustion engine. Before the rotating member is brought into contact with the seal part of the ring-shaped seal member by making the distance smaller than the distance from the start part of the regulating surface in the rotation axis direction to the seal part of the ring-shaped seal member. An internal combustion engine starting rotational force transmission mechanism assembling method characterized in that it can be restricted only to movement in the rotational axis direction passing through a normal seal sliding position. 5. The internal combustion engine start rotational force transmission mechanism according to claim 3, wherein the ring gear is rotated by meshing a pinion gear rotated by a start motor with a ring gear as the rotation member, and the ring gear and the crankshaft side member are By providing a one-way clutch between the ring gear, the one-way rotational force from the ring gear to the crankshaft is transmitted, and the reverse-direction rotational force prevents transmission,
By fitting at least part of the center hole of the ring gear to the outer peripheral surface of the bearing provided on the outer peripheral surface of the crankshaft, the seal sliding surface formed on the ring gear contacts the seal part of the ring-shaped seal member An internal combustion engine starting rotational force transmission mechanism assembling method characterized by restricting the ring gear to only the movement in the rotational axis direction that passes through the normal seal sliding position with the outer peripheral surface of the bearing as a restricting surface. 5. The internal combustion engine start torque transmission mechanism according to claim 3, wherein the ring gear is rotated by meshing the pinion gear rotated by the start motor with the ring gear, and the ring gear and the crankshaft side member as the rotation member are rotated. By providing a one-way clutch between the ring gear, the one-way rotational force from the ring gear to the crankshaft is transmitted, and the reverse-direction rotational force prevents transmission,
By fitting at least a part of the center hole of the crankshaft side member to the outer peripheral surface of the crankshaft with the ring gear having the ring-shaped seal member disposed on the internal combustion engine body side, the crankshaft side member Before the seal sliding surface formed above comes into contact with the seal portion of the ring-shaped seal member, the crankshaft side member is a rotating shaft that passes the normal seal sliding position with the outer peripheral surface of the crankshaft as a regulating surface. An internal combustion engine starting rotational force transmission mechanism assembling method characterized by restricting to only a directional movement. A ring-shaped seal member that transmits the rotational force of the starter motor to the crankshaft via the rotation transmission mechanism and seals the oil supplied from the internal combustion engine body side between the internal combustion engine body and the rotation transmission mechanism An internal combustion engine starting rotational force transmission mechanism comprising:
The rotation transmission mechanism includes a rotating member having a seal sliding surface that makes an oil seal by slidingly contacting a seal portion of the ring-shaped seal member;
The rotating member has a regulated surface that is regulated only by movement in the rotation axis direction passing through a normal seal sliding position by contact with a regulating surface provided on the internal combustion engine side, and the start of the regulated surface The distance in the rotation axis direction from the part to the contact start part on the seal sliding surface with respect to the seal part of the ring-shaped seal member is the seal of the ring-shaped seal member from the start part of the restriction surface on the internal combustion engine side. An internal combustion engine starting rotational force transmission mechanism characterized by being made smaller than the distance in the direction of the rotational axis to the part. The internal combustion engine starter is provided with a ring-shaped seal member that transmits the rotational force of the starter motor to the crankshaft through the rotation transmission mechanism and seals the oil supplied from the internal combustion engine body inside the rotation transmission mechanism. A rotational force transmission mechanism,
The rotation transmission mechanism includes a first rotation member on which the ring-shaped seal member is disposed, and a second rotation member having a seal sliding surface that contacts a seal portion of the ring-shaped seal member,
The second rotating member has a regulated surface that is regulated only by movement in the rotation axis direction passing through a normal seal sliding position by contact with a regulating surface provided on the internal combustion engine side, and the regulated surface The distance in the rotation axis direction from the start part of the ring-shaped seal member to the contact start part on the seal sliding surface with respect to the seal part of the ring-shaped seal member is from the start part of the regulating surface on the internal combustion engine side to the ring-shaped seal member An internal combustion engine starting rotational force transmission mechanism characterized in that it is smaller than the distance in the direction of the rotational axis to the seal part. 9. The rotation transmission mechanism according to claim 7, wherein the rotation transmission mechanism includes a ring gear that receives a rotational force from a pinion gear that is rotated by a starter motor, a crankshaft side member that is provided on a crankshaft, the ring gear, and the crankshaft side member. A one-way clutch arranged between the ring gear and the crankshaft side member for transmitting the rotational force in one direction by the starting motor and preventing the rotational force in the reverse direction from being transmitted,
The ring gear corresponds to a rotating member according to claim 7 or a first rotating member according to claim 8, and the crankshaft side member corresponds to a second rotating member according to claim 8. mechanism.

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