JP2013209977A - Valve opening-closing timing control device - Google Patents

Abstract

A valve opening / closing timing control device is provided that suppresses deformation of a partition portion when a vane portion of a driven side rotation member comes into contact with a partition portion of a drive side rotation member.
An outer rotor and an inner rotor are arranged so as to be rotatable about a rotation axis X so as to fit a vane portion 22 of an inner rotor 20 between a plurality of partition portions 12 of the outer rotor. A lock mechanism L that locks the inner rotor 20 and the outer rotor 10 at an intermediate lock phase T is provided. A plate that abuts the outer rotor 10 and the inner rotor 20 from the direction of the rotation axis X is connected to the plate 12 and the partition portion 12 by a fastening member 6, and a reinforcing body 15 that engages the plate and the partition portion 12 is provided. Prepared.
[Selection] Figure 2

Description

  The present invention relates to a valve opening / closing timing control device, and more particularly, to a drive-side rotating member that rotates synchronously with a crankshaft of an internal combustion engine, and a valve-opening / closing valve for an internal combustion engine that is disposed coaxially with a rotation axis of the drive-side rotating member. In the valve opening / closing timing control device provided with the camshaft and the driven side rotating member that rotates integrally with the camshaft, the relative rotational phase of the driving side rotating member and the driven side rotating member in a state of contacting with each other is adjusted. The present invention relates to a technology for suppressing the deviation.

  As described above, Patent Document 1 includes a driving side rotating member (housing in the literature) and a driven side rotating member (vane rotor in the literature) as a configuration for suppressing the relative rotational phase shift as described above. A valve opening / closing timing control device (a variable mechanism in the literature) clamped with a cover and fastened with a bolt is shown.

  In Patent Document 1, a plurality of partition portions (partition portions in the literature) are formed so as to protrude inside the drive side rotation member, and a plurality of vane portions (reference documents) formed on the driven side rotation member between the plurality of partition portions. In this case, the vane is fitted. As a result, a retarding chamber and an advance chamber are formed between the partition portion and the vane portion. By selecting one of the retard chamber and the advance chamber and supplying hydraulic oil, the driven side rotating member Realize relative rotation.

  In Patent Document 1, a convex portion protruding in the retarding direction is formed with respect to one of the plurality of vane portions, a convex portion protruding in the advance direction is formed with respect to the other one of the vane portions, and relative rotation is performed. When the phase reaches the most retarded angle, one convex part is brought into contact with the bolt, and when the relative rotational phase reaches the most advanced angle, the other convex part is brought into contact with the bolt to limit the relative rotational phase. It has a configuration to decide. With this configuration, the direct contact between the vane portion and the partition portion is avoided, the displacement between the drive side rotating member and the sprocket is suppressed, and the most retarded angle and the most advanced angle vary from a preset phase. To eliminate the inconvenience.

JP 2011-256772 A

  As described in Patent Document 1, in the configuration that suppresses direct contact between the vane portion and the partition portion, a convex portion is formed in the vane portion, and a concave portion through which the convex portion is inserted is formed in the partition portion. This complicates the structure of the driving side rotating member and the driven side rotating member. Further, in the configuration in which the convex portion is brought into contact with the bolt, the bolt is rod-shaped and the contact area with the convex portion is relatively narrow, so that the contact portion of the convex portion is deformed when repeatedly contacting. It is also conceivable that the relative rotation phase of the most retarded angle or the most advanced angle fluctuates from a preset phase.

  Like the conventional valve opening / closing timing control device, the configuration in which the vane portion of the driven side rotating member abuts against the partition portion of the driving side rotating member in order to determine the position of the most retarded angle or the most advanced angle is a shape. Is simple and easy to manufacture. However, in a situation where the hydraulic oil is not sufficiently supplied, such as when the internal combustion engine is started, the drive-side rotating member and the driven-side rotating member are largely swung around the rotation axis so that the partition portion and the vane portion are repeatedly strong. It may come into contact. In such a strong contact, a plastic deformation such as buckling is caused to the partition portion, or a state in which it is pressed while being elastically deformed by a fastening force acting in the axial direction by the fastening member, and the most retarded angle or It has also been considered that the relative rotational phase of the most advanced angle changes from a preset phase.

  As described above, when the relative rotation phase of the most retarded angle or the most advanced angle determined by the contact of the vane portion with the partition portion changes from the preset phase, the most retarded angle or most advanced angle is used as a reference. The relative rotational phase cannot be properly controlled, and there is room for improvement.

  An object of the present invention is to suppress deformation of a partition portion in a valve opening / closing timing control device in which control is performed such that a vane portion of a driven side rotating member is brought into contact with a partition portion of a driving side rotating member.

  A feature of the present invention is that a driving side rotating member that rotates synchronously with a crankshaft of an internal combustion engine, a rotating shaft core of the driving side rotating member, and a coaxial shaft that is disposed coaxially with the camshaft for opening and closing the valve of the internal combustion engine. A driven-side rotating member, and a plate provided at a position facing at least one of the radially extending surfaces of the driving-side rotating member, and inward from the outer periphery of the driving-side rotating member The drive-side rotating member and the driven member are fitted into a fluid space formed between the plurality of extending partitioning portions by inserting a vane portion extending outward from an inner peripheral portion of the driven-side rotating member. The side rotation member is configured to be relatively rotatable within the movable range of the vane portion, and the fluid space is divided by the vane portion, so that the driven side rotation member is relative to the drive side rotation member. Rotational position A retarding chamber that changes the relative rotational phase to the advanced side, and a restraining mechanism that restrains the relative rotational phase includes the most retarded phase and the most advanced angle. A restraint body that is switchable between a restraint position that restrains relative rotation between the drive side rotational member and the driven side rotational member and a release position that releases the restraint at the relative rotational phase excluding the phase; and A fastening member that fixes the plate and the partitioning portion of the driving side rotation member, and the vane portion of the partitioning portion when the relative rotation phase is the most retarded phase or the most advanced angle phase. A reinforcing body is engaged with the partition portion having an abutting surface on which the abuts.

Since the drive side rotation member has a configuration including a plurality of partition portions projecting inwardly from the outer peripheral portion, the partition portions are displaced when the vane portions come into contact with each other. The restraining mechanism restrains the relative rotation between the driving side rotating member and the driven side rotating member at a relative rotational phase excluding the most retarded angle phase and the most advanced angle phase within the movable range of the vane portion. Thus, when the restriction of the restraining mechanism is released at the start of the internal combustion engine and the relative rotational phase is changed to the most retarded angle direction, the vane portion and the retard side section are separated when the restraint of the restraining mechanism is released. Further, since the working oil is relatively large in the retarding chamber, the vane portion may be strongly brought into contact with the partition portion. Thus, the phenomenon in which the vane portion is brought into strong contact with the partition portion is caused by reaction force accompanying rotation of the crankshaft acting on the driven side rotation member, and the contact is repeatedly performed. With respect to such inconveniences, by configuring as in the present invention, even if a situation occurs in which the vane portion comes into contact with the partition portion with a strong force, the reinforcing body applies the force acting on the partition portion to the plate. It will be received in the form of telling and deformation can be suppressed.
Therefore, in the valve opening / closing timing control device in which the control is performed so that the vane portion of the driven-side rotating member is brought into contact with the partition portion of the driving-side rotating member, a valve that realizes appropriate control by suppressing deformation of the partitioning portion. An opening / closing timing control device was constructed.

  In the present invention, the distance in the radial direction from the rotating shaft core to the reinforcing body may be set shorter than the distance in the radial direction from the rotating shaft core to the fastening member.

  Since the drive side rotation member has a configuration including a plurality of partition portions projecting inward from the outer peripheral portion, when the vane portion comes into contact, the projecting end of the partition portion (the end portion close to the rotation axis) , Displacement more. For this reason, the vane portion has a strong force with respect to the partition portion by disposing a reinforcing body that engages the plate and the partition portion at a position close to the rotation axis with respect to the position of the fastening member. Even if the abutting situation occurs, the force acting on the partition portion is received in a form in which the reinforcing body transmits it to the plate, so that deformation can be suppressed.

  In the present invention, an engagement hole is formed in the plate and the partition portion in a posture parallel to the rotation axis, and the reinforcing body is configured in a pin shape so as to engage with each engagement hole. May be.

  According to this, an engagement hole is formed in the plate and the partition part, and an engagement hole is formed by using, for example, a pin-shaped reinforcing body that engages over these engagement holes. By adopting a process such as driving a reinforcing body into the hole, the plate and the partition portion can be integrated to suppress the relative displacement of each.

  In the present invention, a pair of the plates are provided so as to sandwich the driving side rotating member and the driven side rotating member from a direction along the rotation axis, and the pair of plates are attached to the partition portion by the fastening member. An engagement hole that is fixed and is parallel to the rotational axis is formed in the pair of plates and the partition portion, and the reinforcing body is configured in a pin shape so as to engage with these engagement holes. May be.

  According to this, an engagement hole is formed across one of the pair of plates, the partitioning portion, and the other plate, and a pair of reinforcing members are driven into the engagement hole. The relative displacement can be suppressed by integrating the plate and the partition portion. In particular, if a sprocket or the like is formed on the outer periphery of one of the pair of plates and the driving force from the crankshaft is transmitted to the sprocket or the like, the plate that transmits the driving force and the partitioning portion are integrated by a reinforcing body. Therefore, the relative displacement between the plate and the partition portion is also suppressed, and the driving force from the crankshaft can be reliably transmitted to the partition portion.

  Another feature of the present invention is that a drive-side rotating member that rotates synchronously with a crankshaft of an internal combustion engine, and a cam for opening and closing the valve of the internal-combustion engine that is disposed on the same axis as the rotational axis of the drive-side rotating member. A driven-side rotating member that rotates synchronously with the shaft, and a plate provided at a position facing at least one of the radially extending surfaces of the driving-side rotating member, and an outer peripheral portion of the driving-side rotating member The drive side rotation is performed by fitting a vane portion extending outward from the inner peripheral portion of the driven side rotation member into a fluid space formed between a plurality of partition portions extending inward from the inside. A member and the driven side rotating member are configured to be relatively rotatable within a movable range of the vane portion, and the fluid space is divided by the vane portion, whereby the driven side with respect to the driving side rotating member is Of rotating parts A retarding chamber that changes the counter-rotation phase to the retard side and an advance chamber that changes the relative rotation phase to the advance side are formed, and the restraining mechanism that restrains the relative rotation phase includes the most retarded phase and A restraint body that can be switched between a restraint position that restrains relative rotation between the drive side rotational member and the driven side rotational member at the relative rotational phase excluding the most advanced angle phase and a release position that releases the restraint is provided. A fastening member configured to fix the plate and the partition portion of the driving side rotation member, and the relative rotation phase is set to at least one of the retard chamber and at least one of the advance chamber. There is a protector against which the vane portion abuts at the most retarded angle phase or the most advanced angle phase.

  If it is this structure, since a vane part does not contact | abut with respect to a division part, a deformation | transformation of a division part can be eliminated completely. Therefore, the valve opening / closing timing control device that realizes appropriate control can be realized by suppressing the deformation of the partition portion in the valve opening / closing timing control device.

  In addition, the protector is formed in a cylindrical shape having an axis parallel to the rotation axis, and the surface of the vane portion facing the protector has a curvature smaller than the curvature of the outer peripheral surface of the protector. And the circular-arc-shaped part which can accommodate at least one part of the said protection body may be formed.

  With such a configuration, since the vane portion can be rotationally driven to a position where the protector is accommodated, a large rotation range of the vane portion can be ensured. In addition, when the vane portion reaches the most advanced position or the most retarded position, the amount of hydraulic oil stored on the end side of the fluid space can be reduced. Therefore, responsiveness can be improved.

  The protective body may be provided in the retard chamber and the advance chamber in the same fluid space.

  With such a configuration, a protector can be provided with a single vane portion interposed therebetween. Therefore, for example, when reinforcing the vane portion that comes into contact with the protector, the countermeasure can be performed with only one vane member, so that the structure can be simplified.

It is a vertical side view which shows the structure of the valve timing control apparatus which concerns on 1st Embodiment. It is the II-II sectional view taken on the line of FIG. It is sectional drawing of the valve timing control apparatus which concerns on 1st Embodiment which has a relative rotational phase in the most retarded angle. It is sectional drawing of the valve timing control apparatus which shows a reinforcement body. It is sectional drawing of the valve opening / closing timing control apparatus which shows the modification of a reinforcement body. It is an axial sectional view showing the composition of the valve timing control device concerning a 2nd embodiment. It is sectional drawing of the valve timing control apparatus which concerns on 2nd Embodiment which has a relative rotational phase in the most retarded angle. It is sectional drawing of the valve timing control apparatus which concerns on 2nd Embodiment which has a relative rotational phase in the most advanced angle. It is an axial direction sectional view showing the modification of the valve timing control device concerning a 2nd embodiment. It is a modification of the valve timing control apparatus which concerns on 2nd Embodiment.

1. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
[Basic configuration]
1 and 2 show a valve opening / closing timing control apparatus according to the present invention. This valve opening / closing timing control device includes an external rotor 10 as a driving side rotation member and an internal rotor 20 as a driven side rotation member, and also restrains (restrains) relative rotation between the external rotor 10 and the internal rotor 20. A lock mechanism L as a mechanism is provided. The external rotor 10 rotates synchronously via the crankshaft 1 and the timing chain 2 of the engine E as an internal combustion engine. The internal rotor 20 is connected to the camshaft 3 that opens and closes the intake valve of the combustion chamber of the engine E, and the rotation axis X of the external rotor 10 (the axis of the camshaft 3 so as to be rotatable relative to the external rotor 10). Is aligned with the core) and coaxial core. The locking mechanism L prevents (restrains) the relative rotation between the outer rotor 10 and the inner rotor 20 to hold them in a preset relative rotation phase.

  This valve opening / closing timing control device selects one of the advance chamber R1 and the retard chamber R2 formed between the external rotor 10 and the internal rotor 20, and operates the hydraulic oil (an example of fluid) by the rotation phase control valve V1. ), The relative rotational phase between the external rotor 10 and the internal rotor 20 can be arbitrarily set, and the hydraulic fluid is supplied from the lock control valve V2 to the lock mechanism L to lock the lock mechanism L. Release is realized.

  The rotation phase control valve V1 and the lock control valve V2 are configured as electromagnetic valves, and are controlled by a control signal of a rotation phase control unit 41 that functions as an ECU. The rotation phase control unit 41 is a detection signal from a phase sensor (not shown) that detects the relative rotation phase between the external rotor 10 and the internal rotor 20, a speed sensor (not shown) that detects the rotation speed of the engine E, and the like. Based on the above, a target relative rotational phase is set, and control signals are output to the rotational phase control valve V1 and the lock control valve V2.

  By this control, the relative rotation phase between the external rotor 10 and the internal rotor 20 is changed, and the control of the opening / closing timing (timing) of the intake valve controlled by the rotation of the camshaft 3 is realized, and the lock mechanism L is unlocked. And realize the transition to the locked state. The valve opening / closing timing control device of the present invention may be configured to control not only the intake valve but also the opening / closing timing of the exhaust valve.

[Specific configuration of valve timing control device]
The valve opening / closing timing control device sandwiches the external rotor 10 and the internal rotor 20 described above between the front plate 4 at the front position and the rear plate 5 on the opposite side (engine side), and from the front plate 4 to the external rotor 10. The connecting bolts 6 as the fastening members inserted through are connected (fastened) to the rear plate 5 in a screwed manner.

  A sprocket 5S around which the timing chain 2 is wound is integrally formed at the outer peripheral position of the rear plate 5. Between the front plate 4 and the internal rotor 20, a torsion that urges the internal rotor 20 in the advance angle direction S1. A spring 7 is provided. A fixing bolt 8 for connecting and fixing the internal rotor 20 to the camshaft 3 is arranged coaxially with the rotary shaft X, and a part of an advance oil passage 25 described later is formed on the outer peripheral side of the fixing bolt 8. .

  The outer rotor 10 is formed with a plurality of partition portions 12 extending inward from an outer shell portion 11 serving as a cylindrical outer peripheral portion. The internal rotor 20 is formed with a plurality of vane portions 22 extending radially from a main body portion 21 as an inner peripheral portion having a cylindrical shape. An oil chamber (an example of a fluid space) is formed between the plurality of partition portions 12 of the external rotor 10, and the external rotor 10 and the internal rotor 20 are arranged so that the vane portion 22 is fitted into the oil chamber. With this arrangement, the oil chamber is partitioned by the vane portion 22, and the advance chamber R1 is formed on one side and the retard chamber R2 is formed on the other side with respect to the vane portion 22. Further, the outer rotor 10 and the inner rotor 20 are relatively rotatable by an angle (movable range) at which the vane portion 22 can move in the oil chamber.

  The external rotor 10 is rotationally driven in the direction indicated by S (rotation direction S) in FIG. The advance chamber R1 changes the relative rotation phase in the advance direction S1 when the hydraulic oil is supplied, and the retard chamber R2 changes the relative rotation phase in the retard direction S2 when the hydraulic oil is supplied. Let The protruding end of the vane portion 22 is provided with a seal 23 that contacts the inner peripheral surface of the outer shell portion 11 of the outer rotor 10. As shown in FIG. 3, the partition portion 12 has a contact surface 12 </ b> S that contacts the partition portion 12 when the relative rotational phase is set to the most retarded angle, and the partition portion 12 and the vane portion 22 contact each other. In this state, a groove for supplying the hydraulic oil from the advance oil passage 25 between the contact surface 12S and the vane portion 22 is formed.

  The middle of the relative rotation phase between the most retarded angle and the most advanced angle is referred to as an intermediate phase, and the torsion spring 7 starts from the state where the relative rotation phase is at the most retarded angle until the relative rotation phase reaches the intermediate phase. A range in which the urging force is applied is set so that the urging force is applied. The range in which the urging force of the torsion spring 7 acts may exceed the intermediate phase, or may not reach the intermediate phase.

  In this valve opening / closing timing control apparatus, an advance oil passage 25 communicating with the advance chamber R1 and a retard oil passage 26 communicating with the retard chamber R2 are formed with respect to the internal rotor 20, and the lock mechanism L An unlocking oil passage 27 for unlocking is formed. These oil passages communicate with an oil passage inside the camshaft 3, and are connected from the outer surface of the camshaft 3 to the rotation phase control valve V1 and the lock control valve V2. The hydraulic pump P that supplies hydraulic oil to the rotation phase control valve V1 and the lock control valve V2 is driven by the engine E.

[Lock mechanism]
The lock mechanism L is a lock pin 31 as a restraining body provided so as to be freely retractable along an axis parallel to the rotation axis X with respect to one of the plurality of vane portions 22 formed in the internal rotor 20. And a fitting recess 32 formed in the rear plate 5 so that the lock pin 31 is fitted, and a lock spring 33 that urges the lock pin 31 in the engaging direction (extending direction). Yes.

  The position of the fitting recess 32 is set so that the lock mechanism L is locked (restrained) at the intermediate lock phase T as a restraint position. The intermediate lock phase T is set to a phase in which the engine E operates efficiently with good fuel consumption among intermediate phases whose relative rotational phase is the center between the most retarded angle and the most advanced angle. In addition, the rotation phase control unit 41 executes control for shifting the lock mechanism L to the locked state by changing the relative rotation phase to the intermediate lock phase T when performing stop control of the engine E. The lock release oil passage 27 is connected to the lock pin 31. When the lock state is released, the rotation phase control unit 41 controls the lock control valve V2 to supply hydraulic oil to the lock release oil passage 27. Done. By this control, the lock pin 31 is extracted from the fitting recess 32 and the locked state is released.

  The intermediate lock phase T need not be limited to the central position between the most retarded angle and the most advanced angle, and the intermediate lock phase T is set to an area including the retarded angle side and the advanced angle side with respect to the center position. Also good.

(Reinforcing body)
In this valve opening / closing timing control device, as one of the control modes in the rotational phase control unit 41, relative rotation is achieved by bringing the vane portion 22 into contact with the contact surface 12S of the partition portion 12 during cranking when the engine E is started. A sequence is set such that the rotational phase is set to the most retarded angle, and thereafter, after the hydraulic oil is supplied for a predetermined time, ignition of the combustion chamber is started.

  When executing the control in this control mode, the hydraulic oil is supplied from the hydraulic pump P to the unlocking oil passage 27 to release the locked state of the lock mechanism L, and the hydraulic oil is supplied to the retard chamber R2. To change the relative rotational phase in the retard direction. However, there may be a case where the hydraulic pressure necessary for changing the relative rotation phase cannot be sufficiently supplied to the advance chamber R1 at the timing when the lock state of the lock mechanism L is released. Alternatively, when the engine E is stopped while the lock mechanism L is not locked (failed state such as engine stall), the hydraulic pressure necessary for shifting to the locked state cannot be supplied at the initial stage when the engine E is restarted. Under these circumstances, the internal rotor 20 largely swings about the rotation axis X due to the reaction force accompanying the rotation of the camshaft 3, and the vane portion 22 repeatedly and strongly abuts against the contact surface 12S of the partition portion 12. In some cases, the projecting end of the partition 12 may be deformed in the retarding direction S2.

  In order to prevent this deformation, as shown in FIG. 2 and FIG. 4, a reinforcing body 15 composed of a knock pin (configured in a pin shape) is provided so as to engage with the front plate 4 and the partition portion 12. Yes. That is, in the partition portion 12, the rotational axis X is located at an engagement position that is a short distance D2 from the rotational axis X with reference to the distance D1 from the rotational axis X to the connection bolt 6 (an example of a fastening member). 12A is formed in a parallel posture. Further, the front plate 4 is provided with an engagement hole 4A that is parallel to the rotary shaft X at a position that coincides with the engagement hole 12A, and a reinforcing member 15 is driven over these to form the partition portion 12. The front plate 4 is integrated. The driven reinforcing body 15 reaches a state where it is closely fitted in the engagement hole 4A and the engagement hole 12A, and is in a state of being prevented from coming off.

  With such a configuration, the reinforcing body 15 is engaged between the front plate 4 and the vicinity of the protruding end of the partitioning portion 12 of the external rotor 10 as the driving side rotating member, and the vane portion 22 is connected to the partitioning portion 12. Even if it repeatedly and strongly abuts against the abutment surface 12S, the force acting on the partitioning portion 12 is received in a form that is transmitted from the reinforcing body 15 to the front plate 4, and deformation of the partitioning portion 12 is suppressed.

[Modified example of engaging form of reinforcing body]
The reinforcing body 15 of the present invention is not limited to the engagement form that engages with the front plate 4 and the partition portion 12 as described above. As shown in FIG. 5, the front plate 4, the partition portion 12, A configuration in which the reinforcing body 15 engages with the rear plate 5 may be employed.

  That is, in the partitioning portion 12, the engagement position that is parallel to the rotational axis X at an engagement position that is a short distance D2 from the rotational axis X with reference to the distance D1 from the rotational axis X to the connecting bolt 6. A joint hole 12A is formed. The front plate 4 and the rear plate 5 are provided with an engagement hole 4A and an engagement hole 5A that are parallel to the rotation axis X at a position that coincides with the engagement hole 12A. To integrate them.

  As a result, the reinforcing member 15 is engaged with the front plate 4 and the rear plate 5 in the vicinity of the protruding end of the partitioning portion 12 of the external rotor 10 serving as the driving side rotating member, and the vane portion 22 is partitioned. Even if it repeatedly and strongly abuts against the abutment surface 12S of the portion 12, the force acting on the partitioning portion 12 is received in a form that is transmitted from the reinforcing body 15 to the front plate 4 and the rear plate 5, and deformation of the partitioning portion 12 is suppressed. To do.

  In particular, in this modification, even if the positional relationship between the outer rotor 10 and the rear plate 5 changes due to the vane portion 22 repeatedly and strongly abutting against the abutting surface 12S of the partition portion 12, the reinforcing body 15 Prevents relative displacement between the outer rotor 10 and the rear plate 5. In other words, in the configuration in which the rear plate 5 is connected to the partition portion 12 by the connecting bolt 6, the outer rotor 10 and the rear plate 5 are only in the gap between the hole formed in the partition portion 12 and the outer periphery of the connecting bolt 6. Relative displacement (displacement) is possible. Such relative displacement leads to a disadvantage that the relative rotational phase between the sprocket 5S and the external rotor 10 changes, but the reinforcing body 15 prevents the relative displacement between the partition portion 12 and the rear plate 5 and makes contact. By maintaining the relative rotational phase in a state where the surface 12S and the vane portion 22 are in contact with each other at a predetermined phase, it is possible to maintain highly accurate control.

[Other modified examples of the engaging form of the reinforcing body]
(A) An engagement hole 12A is formed at the same engagement position as described above in the partition part 12, and an engagement hole 5A is formed in the rear plate 5 at a position coincident with the engagement hole 12A. As shown, a reinforcing body 15 is provided. As described above, even if the reinforcing body 15 is provided only between the rear plate 5 and the partition portion 12, the deformation of the partition portion 12 can be suppressed.

(B) The reinforcing body 15 is provided at a position indicated by an imaginary line in FIG. 2 in the same manner as in the embodiment with respect to the partition portion 12 at a position where the vane portion 22 contacts when the vane portion 22 reaches the most advanced angle. By configuring in this way, the deformation of the partition portion 12 when the vane portion 22 changes in the most advanced angle direction and contacts the partition portion 12 can also be suppressed.

(C) An engagement hole 12A is formed at an engagement position of two or more partition parts 12, and an engagement hole is formed at a position corresponding to the engagement hole 12A in at least one of the front plate 4 and the rear plate 5. And the reinforcement body 15 is provided so that these may be engaged. Even in such a configuration, it is possible to suppress deformation of the partition portion 12.

(D) A reinforcing body 15 that engages in a screw-like manner like a stud bolt is provided at the same engaging position as that described above in the partition portion 12, and this reinforcing body 15 is engaged with the front plate 4 or the rear plate 5. . Similarly, the front plate 4 or the rear plate 5 is provided with a screw type like a stud bolt, and the reinforcing body 15 is engaged with an engagement hole 12A formed at an engagement position of the partition portion 12. Configure. In this configuration, continuous engagement is realized without causing the reinforcing body 15 to drop off.

(E) As the external rotor 10, a plate is integrally formed on the front side or the rear side, so that the external rotor 10 is applied to one of the open configurations. In this configuration, the plate is disposed at a position where the open portion is closed, and the reinforcing body 15 is provided so as to engage with the plate and the partition portion 12. Even in such a configuration, it is possible to suppress deformation of the partition portion 12.

[Operation / Effect of Embodiment]
With such a configuration, even when the vane portion 22 repeatedly and strongly abuts against the abutment surface 12S of the partition portion 12 when the engine E is started, the reinforcing body 15 suppresses deformation of the partition portion 12. To do. Therefore, even when control is performed in which the relative rotation phase is set to the most retarded angle and thereafter the relative rotation phase is changed to the target phase with reference to the most retarded angle, the reference position of the most retarded angle varies. Control with high accuracy is realized over a long period of time. Similarly, when the relative rotation phase is set to the most advanced angle, and the control is performed to change the relative rotation phase to the target phase with reference to the most advanced angle, the reference position of the most advanced angle is used. Control with high accuracy over a long period of time is realized by suppressing the inconvenience that fluctuates.

  Further, in this configuration, the conventional valve opening / closing timing control device configuration is used as it is, and a reinforcing body 15 such as a knock pin is provided so as to penetrate the partition portion 12 of the external rotor 10 and the front plate 4 or the rear plate 5. By improving the degree of engagement, it is possible to suppress the deformation of the partition part 12 and continue high-precision control.

2. Second Embodiment Next, a second embodiment will be described. In the first embodiment, a protective body 91 is provided in an oil chamber (an example of a fluid space) formed between the plurality of partition portions 12 instead of the reinforcing body 15 provided in the partition portion 12. Since the basic configuration, the specific configuration of the valve opening / closing timing control device, and the lock mechanism L are the same as those in the first embodiment, the following description focuses on the differences.

  Similar to the first embodiment, also in this embodiment, as shown in FIG. 6, a plurality of oil chambers (an example of a fluid space) are formed between the partition portions 12. Each oil chamber is formed with a pair of advance chambers R1 and retard chambers R2 partitioned by a vane portion 22. Therefore, a plurality of advance chambers R1 and retard chambers R2 are provided according to the number of oil chambers as shown in FIG.

  In the present embodiment, of such a plurality of advance chambers R1 and retard chambers R2, at least one of the retard chambers R2 and at least one of the advance chambers R1 are provided with a protector 91. In particular, in the present embodiment, a description will be given assuming that one protector 91 is provided in each of the retard chamber R2 and the advance chamber R1 in the same oil chamber. Therefore, in this embodiment, as shown in FIG. 6, in one oil chamber partitioned by the vane portion 22, a pair of protective bodies 91 are provided with the vane portion 22 interposed therebetween.

  The pair of protectors 91 are respectively located in the oil chamber at a position shorter than the distance from the rotation axis X to the connecting bolt 6 when the relative rotation phase is the most retarded phase or the most advanced angle phase. Are provided so as to contact each other. That is, the protector 91 provided in the advance chamber R1 is a position where the radial position is shorter than the distance from the rotation axis X to the connecting bolt 6, and the circumferential position is shown in FIG. As shown, the vane portion 22 is provided at a position where the vane portion 22 contacts when the relative rotational phase is the most retarded phase. Here, the rotation axis X is the rotation center of the external rotor 10, and the connection bolt 6 is a fastening bolt that is inserted into the external rotor 10 from the front plate 4 and screwed into the rear plate 5. Therefore, the protector 91 in the advance chamber R1 is provided with a position that becomes a short distance D3 from the rotation axis X as a radial position on the basis of the distance D1 from the rotation axis X to the connecting bolt 6. . Further, the position in the circumferential direction at that time is such that the operating oil is supplied to the retarding chamber R2, and the vane portion 22 is protected when the relative rotational phase between the outer rotor 10 and the inner rotor 20 reaches the most retarded phase. It is provided at a position in contact with 91. By comprising in this way, it can suppress that the connecting bolt 6 and the protection body 91 mutually interfere in the circumferential direction. Accordingly, since the distance in the circumferential direction of the oil chamber can be made as long as possible, the displacement angle of the relative rotational phase can be set large.

  Similarly, the protector 91 provided in the retarded angle chamber R2 is a position where the radial position is shorter than the distance from the rotation axis X to the connecting bolt 6, and the circumferential position is shown in FIG. As shown, the vane portion 22 is provided at a position where the vane portion 22 abuts when the relative rotation phase is the most advanced angle phase. That is, the protector 91 in the retarded angle chamber R2 is provided with a position that is a short distance D3 from the rotation axis X as a radial position on the basis of the distance D1 from the rotation axis X to the connecting bolt 6. . Further, the circumferential position at that time is such that the working oil is supplied to the advance chamber R1, and the vane portion 22 is protected when the relative rotational phase between the external rotor 10 and the internal rotor 20 becomes the most advanced phase. It is provided at a position in contact with 91. Thereby, the motion of the vane part 22 can be regulated between the most retarded angle phase and the most advanced angle phase.

  In the present embodiment, the protection body 91 is formed in a columnar shape having an axis parallel to the rotation axis X of the external rotor 10. The protector 91 is provided so as to pass through each of the advance chamber R1 and the retard chamber R2 in the axial direction of the rotary shaft X and engage with the front plate 4 and the rear plate 5.

  An arcuate portion 92 having a curvature smaller than the curvature of the outer peripheral surface of the protection body 91 and accommodating at least a part of the protection body 91 is formed on the surface of the vane portion 22 facing the protection body 91. . The surface of the vane portion 22 that faces the protector 91 is the surface that comes into contact with the protector 91 as the vane portion 22 is driven to rotate, and hydraulic oil is supplied to the advance chamber R1 or the retard chamber R2. In this case, the surface on which the hydraulic pressure acts on the vane portion 22 corresponds.

  The curvature of the outer peripheral surface of the protector 91 is an index indicating the degree of bending of the arc formed by the outer peripheral surface of the protector 91 and corresponds to a value defined by the reciprocal of the radius of the protector 91. On the other hand, an arc-shaped portion 92 is formed on the surface of the vane portion 22 that faces the protector 91. The arc-shaped portion 92 is a portion formed with a partial arc shape. The arc-shaped portion 92 is formed with a curvature that is smaller than the curvature of the outer peripheral surface of the protector 91. That is, the radius of the circle having the arc-shaped portion 92 as a part of the arc is formed larger than the radius of the protector 91.

  The arc-shaped portion 92 is formed in the vane portion 22 over the rotation axis X direction. Therefore, the protector 91 and the arc-shaped portion 92 are configured such that their axial centers are parallel to each other. The arc-shaped portion 92 is provided on the surface on the advance angle direction S1 side and the surface on the retard angle direction S2 side of the vane portion 22, and the arc-shaped portion 92 is formed in a concave shape with respect to each direction. Therefore, when the vane portion 22 is rotationally driven to the retarding direction S2, the protective body 91 disposed in the advance chamber R1 is disposed on the retarding direction S2 side of the vane portion 22 as shown in FIG. A part is accommodated in the arc-shaped portion 92 facing the surface. On the other hand, when the vane portion 22 is rotationally driven in the advance angle direction S1, the protective body 91 provided in the retard chamber R2 is moved toward the advance angle direction S1 of the vane portion 22 as shown in FIG. A part is accommodated in the arc-shaped portion 92 facing the surface.

  Thereby, since the vane part 22 can be rotationally driven to the position which accommodates the protection body 91, the rotation range of the vane part 22 can be ensured large. Further, when the vane portion 22 reaches the most advanced angle position or the most retarded angle position, the amount of hydraulic oil stored on the end side of the oil chamber can be reduced. Therefore, responsiveness can be improved.

  Next, a modification of this embodiment will be described. In the second embodiment, in FIG. 7, when the relative rotation phase becomes the most retarded phase, the periphery of the protective body 91 on the advance angle chamber R1 side, in particular, the rotational axis X is more than the protective body 91. The oil chamber is shown to remain on the radially outer side. Further, in FIG. 8, when the relative rotational phase becomes the most advanced angle phase, the oil chamber is located around the protective body 91 on the retarded chamber R2 side, particularly outside the protective body 91 in the radial direction of the rotational axis X. Is shown to remain.

  Even in such a case, the responsiveness can be improved as described above. However, in this embodiment, in order to further improve the responsiveness at the time of starting, from the state where the relative rotational phase is in the most advanced angle phase, the retard direction S2 It is preferable that the volume of the remaining oil chamber is reduced when it is rotationally driven to the side of the valve and when the relative rotational phase is rotationally driven to the side of the advance direction S1 from the state where the relative rotational phase is at the most advanced angle phase. An example of such a configuration is shown in FIG. In the example of FIG. 9, the partition portion 12 on the outer side in the radial direction of the rotation axis X is more in line with the shape of the vane portion 22 than the protector 91 on the advance chamber R1 side and the protector 91 on the retard chamber R2 side. It is configured to project to the vane portion 22 side. Accordingly, the volume of the retard chamber R2 remaining in the state where the relative rotational phase is at the most advanced angle phase and the advance chamber R1 remaining in the state where the relative rotational phase is at the most retarded phase, as compared to the example of FIG. The volume of can be reduced. Therefore, when the relative rotational phase is at the most advanced angle phase, the time until the retarding chamber R2 is filled with the hydraulic oil and when the relative rotational phase is at the most retarded phase, the advanced chamber R1 is filled with the working oil. It is possible to shorten the time until the operation is started, and it is possible to improve the responsiveness particularly at the time of starting.

  In the second embodiment, the pair of protective bodies 91 are described as being provided in the same oil chamber. For example, the pair of protectors 91 can be configured to be provided in different oil chambers. Such an example is shown in FIG. In the example of FIG. 10, a pair of protective bodies 91 are provided in adjacent oil chambers. Therefore, a pair of protectors 91 are arranged in a form sandwiching one partition 12. For this reason, it is preferable that the vane portion 22 is provided with the arc-shaped portion 92 only on the surface facing the respective protectors 91. Even in such a case, it is possible to appropriately regulate the relative rotational phase between the most advanced angle phase and the most retarded angle phase.

3. Other Embodiments The present invention may be configured as follows in addition to the above-described embodiments.

(A) As a lock mechanism L, one of the outer rotor 10 and the inner rotor 20 is provided with a lock member that can be moved in and out in the radial direction, a lock recess is formed at a corresponding position, and the lock member is engaged with the lock recess. It may be configured to reach a locked state by entering.

(B) It is not necessary to provide the reinforcing body 15 on the projecting side of the partition 12 from the connecting bolt 6, and it is provided in parallel at a position equal to the distance to the connecting bolt 6 with respect to the rotation axis X. Also good.

(C) Although the valve opening / closing timing control device including the external rotor 10, the front plate 4, and the rear plate 5 has been described in the above-described embodiment, for example, the external rotor 10 and the front plate 4 are integrally formed. You may comprise the external rotor 10 used as a cup shape. In this case, the lock pin 31 may be engaged with the rear plate 5 and the partition portion 12, or may be engaged with the bottom portion of the cup-shaped outer rotor 10 and the partition portion 12. Similarly, the external rotor 10 and the rear plate 5 may be integrally formed to form the cup-shaped external rotor 10. Also in the external rotor 10 configured as described above, the engagement form of the lock pin 31 can be configured in the same manner as described above in the other embodiment (c).

(D) In the second embodiment, it has been described that the pair of protective bodies 91 are provided. However, the protective body 91 may be provided in all the oil chambers. Furthermore, it is also possible to provide the protectors 91 provided in the advance chamber R1 and the protectors 91 provided in the retard chamber R2 so that the numbers thereof are different.

(E) In the second embodiment, it has been described that the arcuate part 92 is provided in the vane part 22, but the vane part 22 may be configured without the arcuate part 92. Moreover, although the protective body 91 was described as being formed in a columnar shape, it is naturally possible to configure it in other shapes. Furthermore, the arcuate part 92 is not limited to the arcuate shape, and can naturally be formed in other shapes.

  INDUSTRIAL APPLICABILITY The present invention can be used for a valve opening / closing timing control device that changes a relative rotation phase by supplying hydraulic oil between a partition portion of a driving side rotating member and a vane portion of a driven side rotating member.

1 Crankshaft 3 Camshaft 4 Plate (front plate)
4A engagement hole 5 plate (rear plate)
5A engagement hole 6 fastening member (connection bolt)
10 Drive side rotating member (external rotor)
11 Outer circumference (outer shell)
12 partition part 12A engagement hole 15 reinforcement body 20 driven side rotation member (internal rotor)
21 Inner circumference (main part)
22 Vane part 31 Constraint body (lock pin)
91 Protective body 92 Arc-shaped part D1 Distance D2 Distance E Internal combustion engine (engine)
L restraint mechanism (lock mechanism)
R1 Lead angle chamber R2 Delay angle chamber T Restraint position (intermediate lock phase)
X rotation axis

Claims (7)

A driving-side rotating member that rotates synchronously with a crankshaft of the internal combustion engine, a driven-side rotating member that is arranged on the same axis as the rotational axis of the driving-side rotating member and that rotates synchronously with a camshaft for opening and closing the valve of the internal combustion engine; A plate provided at a position facing at least one of the surfaces extending in the radial direction of the driving side rotation member,
A vane portion extending outward from the inner peripheral portion of the driven side rotating member with respect to a fluid space formed between a plurality of partition portions extending inward from the outer peripheral portion of the driving side rotating member. By fitting, the driving side rotating member and the driven side rotating member are configured to be relatively rotatable within the movable range of the vane part, and the fluid space is divided by the vane part, A retardation chamber that changes the relative rotation phase of the driven rotation member with respect to the driving side rotation member to a retardation side, and an advance chamber that changes the relative rotation phase to an advance side;
A restraining mechanism for restraining the relative rotational phase; Consists of a restraint that can be switched to a release position for releasing restraint,
A fastening member for fixing the plate and the partition portion of the driving side rotation member;
A reinforcing body is engaged with the partition portion having a contact surface with which the vane portion contacts when the relative rotational phase is the most retarded phase or the most advanced angle phase. Valve opening / closing timing control device.   2. The valve opening / closing timing control device according to claim 1, wherein a distance in a radial direction from the rotating shaft core to the reinforcing body is set to be shorter than a distance in a radial direction from the rotating shaft core to the fastening member.   An engagement hole is formed in the plate and the partition portion in a posture parallel to the rotational axis, and the reinforcing body is configured in a pin shape so as to engage with each engagement hole. The valve opening / closing timing control apparatus according to 1 or 2.   A pair of the plates are provided so as to sandwich the driving side rotating member and the driven side rotating member from a direction along the rotation axis, and the pair of plates are fixed to the partition portion by the fastening member, An engagement hole is formed in the plate and the partition portion in a posture parallel to the rotational axis, and the reinforcing body is configured in a pin shape so as to engage with the engagement hole. Item 3. The valve timing control device according to Item 1 or 2. A driving-side rotating member that rotates synchronously with a crankshaft of the internal combustion engine, a driven-side rotating member that is arranged on the same axis as the rotational axis of the driving-side rotating member and that rotates synchronously with a camshaft for opening and closing the valve of the internal combustion engine; A plate provided at a position facing at least one of the surfaces extending in the radial direction of the driving side rotation member,
A vane portion extending outward from the inner peripheral portion of the driven side rotating member with respect to a fluid space formed between a plurality of partition portions extending inward from the outer peripheral portion of the driving side rotating member. By fitting, the driving side rotating member and the driven side rotating member are configured to be relatively rotatable within the movable range of the vane part, and the fluid space is divided by the vane part, A retardation chamber that changes the relative rotation phase of the driven rotation member with respect to the driving side rotation member to a retardation side, and an advance chamber that changes the relative rotation phase to an advance side;
A restraining mechanism for restraining the relative rotational phase; Consists of a restraint that can be switched to a release position for releasing restraint,
A fastening member for fixing the plate and the partition portion of the driving side rotation member;
At least one of the retard chambers and at least one of the advance chambers are provided with a protector against which the vane portion comes into contact when the relative rotational phase is the most retarded phase or the most advanced angle phase. A valve timing control device.   The protector is formed in a columnar shape having an axis parallel to the rotation axis, and has a curvature smaller than the curvature of the outer peripheral surface of the protector on the surface facing the protector in the vane portion, The valve opening / closing timing control device according to claim 5, wherein an arcuate portion capable of accommodating at least a part of the protective body is formed.   The valve opening / closing timing control device according to claim 5 or 6, wherein the protective body is provided in the retard chamber and the advance chamber in the same fluid space.

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