JP5610835B2 - Engine starter mounting structure - Google Patents

Description

  The present invention relates to an engine starter that is compatible with an idling stop of a vehicle, and more particularly, to an engine starter mounting structure.

  In a conventional engine starter (hereinafter referred to as a starter), the power transmission unit of the starter is usually separated from the ring gear of the engine. When the engine is started, the switch is turned on, whereby the plunger is sucked and the pinion is pushed forward by the suction force. Then, after the pinion thus pushed out and the ring gear are engaged, the starter motor is rotated to start the engine.

  When idling stop is implemented in response to the recent demand for fuel economy, it is necessary to start the engine promptly in response to the engine restart request. To that end, when the engine is stopped and idling is stopped, the pinion and the ring gear are engaged even when the ring gear is rotating before the engine completely stops. It is necessary to start immediately.

  Accordingly, there is a starter that engages the pinion and the ring gear while adjusting the rotational speed in advance, such as a synchronize mechanism, in order to perform the engagement more promptly and smoothly (for example, refer to Patent Document 1). ). However, in order to apply such a synchronization mechanism, a dedicated ring gear is required, and the thickness of the ring gear is also increased. Therefore, there is a conventional technique that performs control equivalent to the synchronization mechanism as shown in Patent Document 1 without using a dedicated link gear (see, for example, Patent Document 2).

  Specifically, for example, when a restart request for an engine is generated, Patent Literature 2 starts energizing the starter motor and predicts when the rotation speeds of the pinion gear and the ring gear are synchronized. Then, in accordance with the predicted time point, the pinion extrusion speed or the extrusion start timing is controlled so that the pinion gear meshes with the ring gear. In this way, the idling stop response similar to the conventional synchronization mechanism is handled by the control process.

  Further, as a pinion mounting structure, there is one having an adjustment mechanism (for example, see Patent Documents 3 and 4).

JP 2006-132343 A Japanese Patent Laying-Open No. 2005-330813 No. 7-3017 No. 7-20376

However, the prior art has the following problems.
In the conventional engine starting devices such as these, the meshing is smoothly performed when the pinion and the ring gear are brought into contact with each other when they coincide with each other. On the other hand, if there is a difference in the number of rotations between the pinion and the ring gear, the gears do not mesh smoothly, resulting in meshing in synchronism while rubbing in a contact state. As a result, noise and gear wear occur.

  Therefore, the synchronization timing by the control is further improved, and the pinion and the ring gear are smoothly meshed. However, when the pinion is pushed out to the ring gear, the pinion is pushed out by the plunger and brought into contact with the link gear to engage with each other. For this reason, variation in time until the contact occurs.

  Such variation also depends on the distance between the pinion and the ring gear. However, the initial positions of the pinion and the ring gear have individual differences depending on the tolerance of the pinion inside the starter (tolerance on the starter side) and the tolerance on the position of the ring gear (tolerance on the engine side). Therefore, individual differences occur in the time until the contact between the pinion and the ring gear due to dimensional variations.

  Further, when the tolerance is sufficiently taken into consideration, there is a greater distance between the pinion and the ring gear. Also, the pinion moves while gradually increasing in speed after starting to move in the ring gear direction. As a result, the collision speed between the pinion and the ring gear increases, the impact is great, and noise and wear occur. Also, since the rotation of the pinion and the ring gear changes while the pinion moves in the ring gear direction, if the time varies, the timing variation when the gears mesh with each other by synchronizing or predicting the rotational speed difference Similarly, noise and wear occur.

  The present invention has been made in order to solve the above-described problems, and has an engine starter mounting structure that can suppress the impact of meshing to reduce noise and suppress wear and life reduction due to the impact. The purpose is to obtain.

The engine starter mounting structure according to the present invention has a pinion that slides in the axial direction on the output shaft of the starter motor, and pushes out the pinion and meshes with the ring gear of the engine unit, whereby the rotational force of the starter motor An engine starter mounting structure for transmitting an engine to a ring gear to start the engine, and when a starter including a pinion is mounted to an engine unit including a ring gear, the shaft is in a state before the pinion and the ring gear are engaged with each other. A distance setting jig inserted so as to abut on the pinion and the ring gear is adjusted so that the distance between the pinion and the ring gear in the direction becomes a predetermined value by adjusting a dimension in which the cumulative tolerance of the attachment connecting portion varies. The starter is attached to the engine part.

  According to the present invention, by attaching the starter to the engine unit using the distance setting jig, the space dimension between the pinion and the ring gear is minimized, and variation in individual differences in the contact time between the ring gear and the pinion gear is reduced. At the same time, by reducing the speed at which the pinion gear collides with the ring gear, it is possible to obtain an engine starter mounting structure that suppresses the impact of meshing, reduces noise, and suppresses wear and life reduction due to the impact. it can.

It is a disassembled perspective view for demonstrating the attachment structure of the engine starting apparatus and engine part in Embodiment 1 of this invention. It is sectional drawing of the state in which the engine starter in Embodiment 1 of this invention was attached to the engine part. It is a disassembled perspective view for demonstrating the attachment structure of the engine starting apparatus and engine part in Embodiment 2 of this invention. It is a perspective view before the assembly to the engine part of the starter with which the distance setting jig in Embodiment 2 of the present invention was integrated. It is a perspective view after the assembly to the engine part of the starter with which the distance setting jig in Embodiment 2 of the present invention was integrated.

  Hereinafter, a preferred embodiment of an engine starter mounting structure according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an exploded perspective view for explaining an attachment structure between an engine starter and an engine unit according to Embodiment 1 of the present invention. The starter 10 is fixed with three screws, i.e., two screws 1 and 2 for fixing to the engine unit 30 side, and a screw 3, a screw 4, and a screw 5 that are used when positioning by adjusting the distance. . The distance setting jig 40 used at the time of attachment has a shape that can contact the ring gear 20 of the engine unit 30.

  FIG. 2 is a cross-sectional view of the engine starting device 10 according to the first embodiment of the present invention attached to the engine unit 30. First, the distance setting jig 40 is pressed against the ring gear 20 while being in contact with the pinion 11 of the starter 10. At that time, the engine part 30 is provided with a cylindrical hole 31, and the cylindrical protrusion of the bracket part of the starter 10 is inserted into the hole 31. Thereby, axial misalignment etc. are prevented and the starter 10 can be inserted in the engine part 30 easily.

  Next, by rotating the distance adjusting screw 3, the screw 4, and the screw 5 and pressing the tip of the adjusting screw 3, the screw 4, and the screw 5 against the surface 32 of the engine unit 30, the starter 10 with respect to the engine unit 30 is pressed. Determine the setting position. In this state, the fixing screws 1 and 2 are temporarily tightened, and the distance setting jig 40 is removed while being shifted.

  After removing the distance setting jig 40, the fixing screw 1 and the screw 2 are finally tightened to complete the fixing of the starter 10 to the engine unit 30. By such an assembling procedure, the ring gear 20 and the pinion 11 can always be fixed with a predetermined distance defined by the thickness of the distance setting jig 40.

  As described above, according to the first embodiment, the fixed position of the starter with respect to the engine unit can be specified based on the distance between the pinion and the ring gear. As a result, the distance between the pinion and the ring gear can be controlled by the tolerance, so that the pinion and the ring gear can be brought close to a minimum distance. As a result, the speed of the pinion when colliding with the ring gear can be reduced. Therefore, noise due to the collision between the pinion and the ring gear and wear due to impact can be reduced, and a reduction in life due to wear can be suppressed.

  Furthermore, in a starter that supports idling stop, when the engine is restarted before it stops, the pinion and ring gear can also be synchronized when the rotation speed of the pinion and the ring gear is synchronized or meshed with the predicted rotation speed. It is possible to suppress individual differences in the time for which the abuts. As a result, the pinion and the ring gear can be smoothly meshed. Therefore, even at the time of such restart, noise due to collision between the pinion and the ring gear and wear due to impact can be reduced, and a reduction in life due to wear can be suppressed.

  In addition, a distance setting jig is used when specifying the fixed position of the starter with respect to the engine unit on the basis of the distance between the pinion and the ring gear. Thereby, the space | interval of a ring gear and a pinion can be adjusted more correctly.

  Further, the distance setting jig can be attached and detached every time the interval is adjusted by defining the order in which the fixing screw and the adjusting screw are tightened or loosened. As a result, the distance between the pinion and the ring gear can be readjusted repeatedly, and it is possible to cope with aging due to wear after mounting.

Embodiment 2. FIG.
In the first embodiment, the procedure for specifying the fixed position of the starter 10 with respect to the engine unit 30 on the basis of the distance between the pinion 11 and the ring gear 20 using the detachable distance setting jig 40 has been described. . On the other hand, in the second embodiment, the case where the distance setting jig is integrated with the starter 10 will be described.

  FIG. 3 is an exploded perspective view for explaining an attachment structure between the engine starting device and the engine unit according to Embodiment 2 of the present invention. In the starter 10 according to the second embodiment, the bracket 50 and the distance setting jig 60 are assembled together by fastening with screws 6 and 7.

  The distance setting jig 60 integrated with the starter 10 is usually provided with a screw hole 60b for attaching the distance setting jig 60 to a predetermined position of the starter 10 and the starter 10 before the starter 10 is assembled to the engine unit 30. A screw hole 60 a for separating the distance setting jig 60 from the engine unit 30 is formed after being assembled to the unit 30.

  The bracket 50 also has through holes 50a and 50b corresponding to the screw holes 60a and 60b of the distance setting jig 60. The through hole 50 a and the screw hole 60 a are fastened with the screw 6, and the through hole 50 b and the screw hole 60 b are fastened with the screw 7.

  The distance setting jig 60 can be moved in parallel with the axial direction in which the pinion 11 moves by the surface 60c provided on the distance setting jig 60 side and the surface 50c provided on the bracket 50 side.

  FIG. 4 is a perspective view of the starter 10 integrated with the distance setting jig 60 according to the second embodiment of the present invention before assembly into the engine unit 30. The distance setting jig 60 is fastened by a screw 7 in a state of being in contact with the pinion 11. In this way, the distance setting jig 60 in contact with the pinion 11 is inserted while pressing the starter 10 against the engine unit 30 so as to contact the ring gear 20, as in the first embodiment. Adjust by turning the distance adjusting screws 3 to 5 (not shown).

  FIG. 5 is a perspective view after assembling the starter 10 into the engine unit 30 in which the distance setting jig 60 according to the second embodiment of the present invention is integrated. By removing the screw 7, the distance setting jig 60 is translated along the surface 50 c of the bracket 50, and the screw 6 is tightened when the through hole 50 b and the screw hole 60 b coincide.

  By tightening the screw 6, the distance setting jig 60 is attracted to the bracket 50 side and is separated from the ring gear 20. In this state, the starter 10 and the engine unit 30 are fastened by finally fastening and fixing the fixing screws 1 and 2.

  As described above, according to the second embodiment, the distance setting jig integrated with the starter is used when specifying the fixed position of the starter with respect to the engine unit on the basis of the distance between the pinion and the ring gear. Is possible. Thereby, the space | interval of a ring gear and a pinion can be adjusted more correctly.

  Furthermore, the distance setting jig is integrated with the starter, and the fixed position can be easily readjusted using the distance setting jig during maintenance. Furthermore, since it has an integrated structure, the work when inserting the starter into the engine side is easy, and it is possible to improve the work efficiency of the assembly, and as a result, the production cost can be suppressed.

  1-7 screw, 10 engine starter (starter), 11 pinion, 20 ring gear, 30 engine part, 31 holes, 32 surfaces, 40 distance setting jig, 50 bracket, 50a through hole, 50b through hole, 50c surface, 60 Distance setting jig, 60a screw hole, 60b screw hole, 60c surface.

Claims (3)

It has a pinion that slides in the axial direction on the output shaft of the starter motor, and pushes the pinion and meshes it with the ring gear of the engine unit, thereby transmitting the rotational force of the starter motor to the ring gear. An engine starter mounting structure for starting,
When the starter including the pinion is attached to the engine portion including the ring gear, the distance between the pinion and the ring gear in the axial direction is the attachment connecting portion before the pinion and the ring gear are engaged with each other. The starter is attached to the engine part via a distance setting jig that is inserted so as to abut against the pinion and the ring gear so that the dimension that varies with the cumulative tolerance of A mounting structure of a characteristic engine starter. In the engine starter mounting structure according to claim 1,
The distance setting jig has a structure that can be attached and detached after the starter is attached to the engine section. In the engine starter mounting structure according to claim 1,
The distance setting jig is configured integrally with the starter, and after the starter is temporarily fixed to the engine unit so that the distance setting jig is in contact with the ring gear while being in contact with the pinion. An engine starter mounting structure characterized by having a structure that can be separated from the ring gear by shifting and removing the distance setting jig .

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