JP2003286812A - Controller for valve opening/closing timing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the reliability of a controller for valve-opening/closing timing which is constituted so that a stopper for regulating the rotational range of a rotor has no effect on the operation of a locking member. <P>SOLUTION: The control device comprises a housing 31, and a rotor 20. A plurality of protrusions 31c are formed in the peripheral direction on the inside-diameter part of the housing 31, which synchronously rotates with either of a rotating shaft of an engine and an intake-exhaust control member for controlling the intake-exhaust of the engine. The rotor 20 rotates with respect to the housing 31 in synchronization with the other part. Recesses 31a are formed between the rotor 20 and the housing 31 and demarcated by vanes 21. A lock member 61 is provided at one of the protrusions 31c of the housing 31. The lock member 61 protrudes or retracts to control or to allow the rotation of the rotor 20 with respect to the housing 31. Stoppers 31k, 31m are provided at the protrusion 31c different from the protrusion 31d where the lock member 61 is provided. A vane 21 comes into contact and controls the rotational range of the rotor 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing control device for controlling the opening / closing timing of an intake / exhaust valve for intake / exhaust of an engine.

[0002]

2. Description of the Related Art Conventionally, as a valve opening / closing timing control device of this type, one disclosed in Japanese Patent Laid-Open No. 2001-3716 is known.

In this publication, a first rotating body (case) rotatably provided on a cam shaft driven in synchronization with the rotation of an engine and having a plurality of convex portions on its inner circumference, and a cam shaft are provided on the cam shaft. A valve timing adjusting device including a second rotating body (rotor) that is fixed and slidably contacts the inner peripheral surface of the first rotating body, and a lock member that restricts relative rotation between the first rotating body and the second rotating body. It is disclosed.

In the device disclosed in this publication, when the first rotating body and the second rotating body are unlocked by the lock member, the first rotating body and the second rotating body can rotate relative to each other, and The opening / closing timing of the intake / exhaust valve is controlled.

Further, in the device disclosed in this publication, a plurality of convex portions are formed in the circumferential direction on the inner circumference of the case, and one of the convex portions is provided with a lock member projecting with respect to the rotor. . Further, in this device, the end surfaces on both sides of the convex portion inside the case in which the lock member is disposed have a function of a stopper that restricts the rotation range of the rotor.

[0006]

In the above-mentioned conventional apparatus, the circumferential end surface of the convex portion on which the lock member is disposed serves as a stopper for restricting the rotation range of the rotor when the rotor relatively rotates. Therefore, when a force for rotating the rotor (for example, a torque received from the cam shaft, a driving torque by hydraulic pressure, etc.) suddenly acts on the rotor, the rotor rapidly moves with respect to the first rotating body. As a result, the rotor vigorously hits the end face in the circumferential direction of the convex portion on which the lock member is arranged, and the rotation range of the rotor is restricted.

Further, since the retracting hole through which the lock member projects or retracts with respect to the housing is formed in the axial direction of the housing, it is likely to be deformed when a force is applied in the circumferential direction.

Further, since the circumferential oil passage for releasing the lock of the lock member is formed in the circumferential direction of the convex portion on which the lock member is disposed, when a force acts in the circumferential direction, it is easily deformed.

Therefore, due to the impact force generated when the rotor hits the circumferential end surface of the convex portion on which the lock member is disposed, the convex portion that makes the lock member slidable in the radial direction is deformed, and the lock member is locked. If the sliding hole of the member is crushed or the lock member is deformed, smooth operation such as protrusion or retraction of the lock member with respect to the rotor cannot be performed, which affects the operation of the lock member. As a result, the reliability of the valve opening / closing timing control device decreases.

Therefore, the present invention has been made in view of the above problems, and the stopper for restricting the rotation range of the rotor does not affect the operation of the lock member, and the reliability of the valve opening / closing timing control device is improved. The technical issue is to improve productivity.

[0011]

The technical means taken to solve the above-mentioned problems is an intake / exhaust system that has a plurality of convex portions on the inner circumference and controls the rotary shaft of the engine or the intake / exhaust system of the engine. A housing having a rotation transmission member that rotates in synchronization with one of the control members, and a rotor that is disposed in the housing so as to be rotatable relative to the housing and that rotates in synchronization with the other of the rotation shaft or the intake / exhaust control member. A fluid chamber formed between the rotor and the housing, and a vane that divides the fluid chamber into an advance chamber and a retard chamber and is radially provided on one of the rotor and the rotation transmission member. A valve opening / closing timing control device that is provided in one of the convex portions and that projects or retracts with respect to the housing and that restricts or allows rotation of the rotor. Different convex portion and the convex portion click member is disposed, is that the vane is provided with a rotation restricting portion for restricting the rotation range of the rotor abuts.

According to the above-mentioned means, since the vane is in contact with the convex portion different from the convex portion on which the lock member is arranged, the rotation regulating portion for regulating the rotation range of the rotor is provided. The vane comes into contact with a convex portion different from the convex portion provided. As a result, when the vane comes into contact with a convex portion different from the convex portion on which the lock member is arranged, the rotation range of the rotor is restricted.

Thus, when the rotor rotates relative to the housing and is regulated by the rotation regulating portion, the impact force is received by the convex portion different from the convex portion on which the regulating portion is arranged, so that the lock is achieved. The retracting hole through which the member projects or retracts is not deformed, and the operation of the lock member is not affected, so that the reliability of the valve opening / closing timing control device is improved as compared with the related art.

In this case, when the rotation restricting portion restricts the rotation range of the rotor, if there is a clearance between the convex portion on which the lock member is disposed and the vane, the rotor rotates, Even if the rotation range of the rotor is restricted,
There is a clearance between the convex portion where the lock member is arranged and the vane. Therefore, the impact force when the relative rotation of the rotor is restricted by the rotation restricting portion of the housing is not directly transmitted to the convex portion in which the lock member is disposed, and the chamber in which the lock member is disposed, and The deformation of the lock member due to its impact force can be suppressed.

Therefore, it is possible to protect the operation of the lock member from the impact force caused by the rotation of the rotor.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a valve opening / closing timing control device (hereinafter referred to as a device) 1. In the configuration shown in FIG. 1, the housing 31 has a hollow cylindrical shape, a sprocket 31i is integrally formed on the outer periphery of the housing 31, and a chain 90 is hooked on the sprocket 31i. Through the chain 90, power can be transmitted to an unillustrated engine rotation shaft (for example, a crankshaft or a member attached to the crankshaft), and, for example, rotation of the engine is transmitted to the sprocket 31i.

A plate member (rear plate) 32 is axially fitted on the one surface of the housing 31 on which the sprocket 31i is formed, coaxially with the housing 31. A plate member (front plate) 33 that is coaxial with the housing 31 and that matches the cylindrical outer circumference of the housing 31 is axially covered on the opposite end surface of the housing 31.

The plate members 32 and 33, which sandwich the housing 31 from both sides, are provided at a plurality of locations (for example, five locations) in the circumferential direction by fastening members 64 such as flanged bolts in one of the axial directions of the rotor 20. It is fixed from the end face 20k and operates integrally with the housing 31.

In the present embodiment, as an example, a structure in which the rotation of the crankshaft (not shown) of the engine is transmitted to the sprocket 31i of the housing 31 via the chain 90 will be described, but the invention is not limited to this. Not something. For example, as another configuration, a belt member is used instead of the chain 90, and the sprocket 31i
May be replaced with a pulley. By adopting such a configuration, the sprocket 31i functions as a rotation transmission unit that transmits the rotational force from the engine to the camshaft 10.

The plate member 32 fixed to one end surface of the housing 31 has a hole 32a formed at the center thereof through which the cam shaft 10 is inserted. Also, the camshaft 1
A concave portion 20b is formed on the end surface of the rotor 20 attached to the axial end portion of 0, and the camshaft 10 for controlling the intake and exhaust valves for controlling intake and exhaust of the engine is positioned in the concave portion 20b. Fastening members 22 such as bolts and bolts
Is fixed to the rotor 20.

In this case, the camshaft 10 and the rotor 20
2 rotates integrally and the rotor 2 with the camshaft 10 fixed
0 and the housing 31 can rotate relative to each other.

The housing 31 has a hollow cylindrical shape.
As shown in FIG. 2, the housing 31 is formed between four recesses 31a formed in an arc shape in the circumferential direction and recesses 31a adjacent to each other in the circumferential direction, and projects toward the center of the housing. Convex portion 31d and convex portion 31
Three convex portions 31c having the same size and the same shape are formed having a circumferential size smaller than that of d. A shoe portion 31b, which is concentric with the housing 31 and has an arc shape, is formed on the inner periphery of the convex portions 31c and 3d.
1a constitutes a fluid chamber including an advance chamber R1 and a retard chamber R2 described later.

Further, the projections 31c and 31d formed in the circumferential direction of the housing 31 are provided with mounting holes 31f for sandwiching the housing 31 from both sides in the axial direction by the plate members 32 and 33 and fixing it by the fastening members 64. The fastening member 64 is inserted into the mounting hole 31f, and the two plate members 32 and 33 are fixed.

On the end surface of the housing 31 opposite to the end surface on which the sprocket 31i is formed, as described above, the recess 31a formed in the housing 30 is closed from one side in the axial direction. The plate member 33 corresponding to is covered with a central hole 33e through which a bolt for fixing the camshaft 10 to the rotor 20 is inserted. Also,
The plate member 33 has a mounting hole 33b into which a fastening member 64 such as a bolt is screwed.

The rotor 20 is disposed on the inner peripheral surface of the shoe portion 31b of the housing 31 so as to be in sliding contact with the outer periphery of the rotor 20 and relatively rotatable. In the center of the rotor 20, a fastening member 22 having a flange 22a fixed to one end of the camshaft 10 has a central inner hole 20c, and the fastening member 22 is fixed to the central inner hole 20c. In this case, a positioning pin for positioning the camshaft 10 and the rotor 20 is provided at the end of the rotor 20 on the side where the camshaft 10 is attached, and the positioning pin causes the camshaft 10 to move to a predetermined position relative to the rotor 20. It is located at.

In the center inner hole 20c of the rotor, the rotor 20
A fastening member 22 having a shaft portion 22a having a diameter slightly smaller than the center inner hole 20c is inserted into the center inner hole 20c from the axial end portion of the rotor 20 and the camshaft. 10 is fixed. This allows
The rotor 20 and the camshaft 10 rotate integrally. As described above, the outer peripheral surface 10 a of the cam shaft 10 is rotatable relative to the plate member 32 in a state where the cam shaft 10 is attached to the rotor 20 and both are fixed.

Further, the rotor 20 is formed from the center inner hole 20c toward the outer peripheral surface of the rotor 20, and
Center inner hole 20c formed in rotor 20 and housing 3
The lock groove 2 in which the three through holes 20f that directly communicate with the recess 31a formed in 1 and the lock plate 61 that restricts relative rotation of the rotor 20 with respect to the housing 31 are accommodated.
A through hole 20j that communicates with 0 g is formed inside the rotor.

Further, in the lock groove 20g, a through groove 20h which communicates with one of the four existing concave portions 31a.
Are formed on the rotor 20. This through groove 20h is
It is formed on a part of the outer peripheral end surface in the axial direction of the rotor 20 having a cylindrical shape, passes through the through hole 20j and the lock groove 20g,
It is configured to communicate with one of the four recesses 31a through the through groove 20h.

When the fastening member 22 is fixed to the camshaft 10, the center inner hole 20c has a gap between the fastening member 22 and the center inner hole 20c. This gap is
A plurality of passages 20f, which function as passages through which hydraulic oil flows,
From 20j and 20h, a part of the concave portion 31a (advance chamber R1)
An oil passage for supplying hydraulic oil to the.

Further, the inside of the camshaft 10 is shown in FIG.
As shown in, the through hole 11 is formed so as to extend in the axial direction. A through hole 20e communicating with the center of the recess 31a in the circumferential direction is formed in the rotor 20 in the through hole 11. Due to the through hole 11 and the through hole 20e, the recess 31a is formed.
And an oil passage for supplying hydraulic oil to the retard chamber R2 formed in the above.

On the outer peripheral surface of the rotor 20, four vane grooves 20 extending radially from the center of the rotor 20 are used.
d is formed. The vane 21 is made of a rectangular plate-shaped member, has a recess at the radially inner end, and a substantially C-shaped plate spring is fitted in the recess. As described above, the vane 21 in which the leaf spring is fitted in the recess is
When the vanes 21 are radially arranged in the 0 vane groove 20d, the vane 21 is biased by the biasing force of the leaf spring so as to come into contact with the inner wall of the outer diameter of the recess 31a formed in the housing 31. The flat vane 21 causes the radial end of the vane 21 to come into contact with the inner wall of the recess 31a serving as the fluid chamber, whereby the four recesses 31a are separated from each other by the vane 21.
It is divided into two rooms. As a result, the advance chamber R1 and the retard chamber R2 are formed on both left and right sides of the vane 21, respectively.

Further, a hole 31g in which the lock spring 62 is disposed is formed at the center of the convex portion 31d larger than the three convex portions 31c formed in the housing 31, and the hole 31g is radially formed. A retracting hole 31e that extends and is formed in the axial direction of the housing 31 communicates. The lock spring 62 is locked to the inner wall of the hole 31g on the outer diameter side, and the other end is fitted to a part of the lock plate 61. The lock plate 61 includes a hole 31g, a retract hole 31e, and the rotor 20.
It slidably moves in the radial direction between the lock groove 20g formed on the outer peripheral surface of the. In addition, when the relative phase between the housing 31 and the rotor 20 is synchronized with a predetermined phase, the lock groove 20g from which the head of the lock plate 61 projects is formed in the rotor 2
No. 0, and the through groove 20h extends circumferentially on the outer peripheral end face in the axial direction of the rotor 20 to form the through groove 20h for supplying hydraulic oil to the lock groove 20g.
The circumferential strength of the convex portion 31d in which is formed is secured.

The withdrawal hole 31e is provided with the lock groove 20 provided on the outer peripheral surface of the rotor 20 when the phase of the rotor 20 with respect to the housing 30 reaches a predetermined phase (most retarded position).
It is provided at a position corresponding to g. In this case, the evacuation hole 31e may be a groove. When the rotor 20 is in this predetermined phase, the lock plate 61 projects into the lock groove 20g of the rotor 20 by the urging force of the lock spring 62, and can engage with the rotor 20. Thus, when the lock plate 61 engages with the lock groove 20g, the rotor 20 does not rotate relative to the housing 31, but rotates integrally.

In the state of the most retarded position where the volume of the advance chamber of the vane 21 shown in FIG. 2 is the smallest, the convex end face 31Q and the convex end face 31P of the convex portion 31d provided with the lock plate 61 in the circumferential direction are , And does not contact the vanes 21 arranged on both sides. That is, in the concave portion 31a including the convex end surface 31Q, there is a clearance between the convex end surface 31Q and the vane 21. Further, in the concave portion 31a including the convex end surface 31P,
Convex end face 31P and concave portion 31 in which the convex end face 31P is formed
The distance from the vane 21 sliding in the area a is the maximum. In the above-described state, one end surface of the convex portion 31c located next to the convex portion 31d in the circumferential direction abuts the side surface of the vane 21 on the advance chamber side, and regulates the rotation range of the vane 21. Part (stopper part) 31 m.

That is, in this embodiment, at least one of the four vanes 21 exists, and at least one vane 21 is different from the convex portion 31d on which the lock plate 61 is disposed.
The rotation of the rotor with respect to the housing 31 is restricted by coming into contact with one end surface in the circumferential direction of c.

On the other hand, the lock plate 61 is disengaged from the lock groove 20g when the lock plate 61 is pressed into the retract hole 31e against the biasing force of the lock spring 62 by the hydraulic pressure of the hydraulic oil. It is supposed to be. As a result, as shown in FIG. 3, the rotor 20 can rotate relative to the housing 31. In this case, four vanes 2
The rotation range of one of the vanes 21 is the stopper portion 31.
Restricted by k, the position of the vane 21 moves to the most advanced position indicated by the chain double-dashed line in FIG.

Between the rotor 20 and the plate member 33,
A coiled torsion spring 24 is arranged. The torsion spring 24 is attached to the housing 31.
Also, the plate member is arranged in annular groove portions 20i, 33c formed in the axial direction. One end of the torsion spring 24 is locked by a locking portion (not shown) formed in a part of the plate member 33. Further, the other end of the torsion spring 24 is locked to a locking portion (not shown) formed in a part of the rotor 20, so that the rotor 20 is always maximized in the space of the advance chamber R1. The rotor 20 is biased in the clockwise direction shown in FIG. 2 with respect to the housing 31 so that the space becomes the minimum (the most advanced position).

In the state where the vane 21 is at the most advanced position, one of the four vanes 21 that exists is different from the convex portion 31d on which the lock plate 61 is provided.
It comes into contact with the end surface of 1c in the circumferential direction, and this portion serves as a rotation restricting portion (stopper portion) 31k at the most advanced position. Even in this state, there is a clearance between one end surface 31j in the circumferential direction of the convex portion 31d and the vane 21 in the concave portion where the end surface 31j is formed, and they do not abut each other.

Next, the operation of the valve opening / closing timing control device 1 will be described.

It is assumed that the rotation of the crankshaft of the engine is transmitted to the valve opening / closing timing control device 1 via the chain 90. Along with this, the housing 31 having the sprocket 31i rotates in synchronization with the crankshaft by the rotation of the chain 90. In this case, for example,
When the lock plate 61 and the lock groove 20g are engaged with each other as shown in FIG.
0 rotates together. As a result, the rotation of the crankshaft is transmitted to the camshaft 10 in synchronization (without phase shift).

Therefore, the rotor 2 with respect to the housing 31
When it is desired to shift the phase of 0 to the advance side, hydraulic oil is supplied from between the central inner hole 20c formed in the camshaft 10 and the outer peripheral surface of the fastening member 22. And the through hole 20j
The hydraulic oil is supplied to the lock groove 20g via.

As a result, when the hydraulic oil is supplied to the lock groove 20g, the lock pin 61 retracts from the lock groove 20g to the retract hole 31e, and the rotation restriction of the housing 31 and the rotor 20 by the lock plate 61 is released. . The hydraulic oil is supplied to the advance chamber R1 through the passage groove 20h, and is also supplied to the other three advance chambers R1 through the through hole 20f. At the same time, the hydraulic oil in the retard chamber R2 is discharged from the four through holes 20e. As a result, the hydraulic pressure on the advance chamber R1 side added to the vane 21 becomes higher than the hydraulic pressure on the retard chamber R2 side, and the vane 21 has a larger capacity in the advance chamber R1 and a smaller capacity in the retard chamber R2. Rotate to the side with respect to the housing 31.

On the other hand, when it is desired to shift the phase timing of the intake / exhaust valve to the retard side, hydraulic oil is supplied to the four retard chambers R2 through the four through holes 20e to operate from the advance chamber R1. Drain the oil. The hydraulic oil fills the retard chamber R2, and the hydraulic pressure on the retard chamber R2 side added to the vane 21 becomes higher than the hydraulic pressure on the advance chamber R1 side. As a result, the vane 21 rotationally moves with respect to the housing 31 toward the retard side where the retard chamber R2 has a large capacity and the advance chamber R1 has a small capacity.

From the above, the phase control of the rotor 20 with respect to the housing 30 can be performed by setting one of the advance angle chamber R1 and the retard angle chamber R2 on the hydraulic oil supply side and the other on the discharge side.

In such an operation, to supplement the present invention, the lock plate 61 is radially slidably disposed in the convex portion 31d. In this case, in the remaining convex portions 31c other than the convex portion 31d on which the lock plate 61 is disposed, as shown in FIG. 3, a stopper portion 31m with which the vane 21 abuts at the most retarded position is provided on the convex portion 31c.
As shown in FIG. 4, a stopper portion 31k with which the vane 21 abuts at the most advanced position is provided on another convex portion 31c. Thereby, the vane 21 can be brought into contact with the convex portion 31c different from the convex portion 31d on which the lock plate 61 is arranged, and the rotation range of the rotor 20 can be regulated. Further, the rotor 20 rotates relative to the housing 31, and the lock plate 61
Even if the rotor 20 reaches the most advanced position where the rotor 20 rotates most, the impact force when the vane 21 abuts on the stopper portion 31k of the convex portion 31c does not depend on the convex portion on which the lock plate 61 is arranged. Convex portion 31c different from the portion 31d
Can be received at.

Therefore, the hole width of the lock plate 61 and the lock groove 20g for ensuring the operation of the lock plate 61 or the withdrawal hole 31e is deformed and distorted due to the impact force.
Alternatively, it is possible to prevent a problem that the lock plate 61 becomes smaller and the sliding operation of the lock plate 61 becomes difficult to perform. Therefore, the structure that does not affect the operation of the lock plate 61 can be obtained, and the reliability of the valve opening / closing timing control device is improved as compared with the conventional case.

In this case, in the convex portion 31c different from the convex portion 31d on which the lock plate 61 is provided, the stopper portion 31m at the most retarded position and the most advanced angle position are provided on the end faces in the circumferential direction of the three adjacent convex portions 31c. It is possible to regulate the rotation range of the rotor 20 with respect to the housing 31 by providing the stopper portion 31k.

As another modified example, as shown in FIG. 5, a stopper portion 31m that comes into contact with the vane 21 of the convex portion 31c at the most retarded position and a vane 2 of the convex portion 31c at the most advanced position.
Even if the position of the stopper portion 31k in contact with 1 is arbitrarily changed, the same effect as above can be obtained. Further, in the present embodiment, the number of the convex portions 31c is three, and the convex portion 31d is the convex portion 3c.
Although described as being larger than 1c, the convex portions 31c,
The number and size of 31d are not limited to this. Note that the chain double-dashed line in FIG. 5 shows, as an example, a state in which the rotor 20 can rotate relative to the housing 31 and the vane 21 is at the most advanced position.

The following technical idea can be understood from the above description.

(Supplementary Note 1) A housing having a plurality of convex portions on the inner circumference thereof and a rotation transmitting member which rotates in synchronization with one of an engine rotation shaft and an intake / exhaust control member for controlling intake / exhaust of the engine; With respect to the rotor, which is rotatably disposed in the housing and rotates in synchronization with the other of the rotary shaft and the intake / exhaust control member, the fluid chamber formed between the rotor and the housing, and the fluid chamber is advanced. Of the rotor and rotation transmitting member, which are divided into a chamber and a retard chamber, and are provided in one of the convex portions and the vanes that are radially provided, and project or retract with respect to the housing to regulate the rotation of the rotor. Alternatively, in a valve opening / closing timing control device including a plate-shaped locking member that allows the rotation, a vane contacts a convex portion different from the convex portion on which the lock member is disposed, and a rotation regulation that regulates the rotation range of the rotor. Set up At the same time, a lock groove is formed in the rotor so that the head of the lock member protrudes when the relative phase of the housing and the rotor are synchronized with each other in a predetermined phase, and the lock groove extends in the circumferential direction on the outer peripheral end face in the axial direction of the rotor and the hydraulic oil flows in the lock groove. A valve opening / closing timing control device, characterized in that a through groove is provided for supplying.

In this case, since the vane abuts on the convex portion different from the convex portion on which the lock member is arranged, the rotation regulating portion for regulating the rotation range of the rotor is provided, so that the lock member is arranged. The vane abuts at a convex portion different from the convex portion. As a result, when the vane comes into contact with a convex portion different from the convex portion on which the lock member is arranged, the rotation range of the rotor is restricted.

As a result, when the rotor rotates relative to the housing and is regulated by the rotation regulating portion, the impact force is received by the convex portion different from the convex portion on which the regulating portion is arranged, so that the locking is achieved. The retracting hole through which the member projects or retracts is not deformed, and the operation of the lock member is not affected, so that the reliability of the valve opening / closing timing control device is improved as compared with the related art.

Further, since the through groove is provided in the rotor, it need not be provided in the housing. Therefore, the convex portion that makes the lock member slidable in the radial direction is not deformed by the impact force when the rotor hits the circumferential end surface of the convex portion on which the lock member is arranged, and Since the structure does not affect the operation of the lock member, the reliability of the valve opening / closing timing control device is improved as compared with the conventional case.

[0055]

According to the present invention described above, since the vane abuts on the convex portion different from the convex portion on which the lock member is disposed, the rotation regulating portion for regulating the rotation range of the rotor is provided. The vane comes into contact with a convex portion different from the convex portion on which the lock member is arranged, so that the rotation range of the rotor can be regulated. As a result, when the rotor rotates relative to the housing and is restricted by the rotation restricting portion, the impact force can be received by the convex portion different from the convex portion on which the regulating portion is arranged, and the locking member It is possible to adopt a configuration that does not affect the operation of.
Therefore, the reliability of the valve opening / closing timing control device is improved as compared with the related art.

In this case, when the rotation range of the rotor is restricted by the rotation restricting part, there is a clearance between the convex part on which the lock member is arranged and the vane.

Therefore, the impact force when the relative rotation of the rotor is regulated by the rotation regulation portion of the housing is not directly transmitted to the convex portion where the lock member is arranged, but the impact force accompanying the rotation of the rotor. The operation of the lock member can be protected from the heat.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a valve opening / closing timing control device according to a first embodiment of the present invention.

2 is a front view showing a state of the vane in the valve opening / closing timing control device shown in FIG. 1 in a state where a plate member on one side is removed and relative rotation between a rotor and a housing is restricted.

FIG. 3 is a front view when the rotor and the housing are released from the relative rotation from the state shown in FIG. 2 and the rotor is relatively rotated with respect to the housing.

FIG. 4 is a front view showing a rotation range of one vane in the configuration shown in FIG.

FIG. 5 is a front view of the valve opening / closing timing control device according to the second embodiment of the present invention in which a stopper portion for restricting the rotation of the vane is provided at another position of the housing.

[Explanation of symbols]

1 Valve opening / closing timing control device 10 Camshaft (intake / exhaust control device) 20 rotor 22 Fastening members 22a flange 22b Shaft 21 vanes 31 housing 31a Recess (fluid chamber) 31c convex part 31d convex part 31f mounting hole 31i sprocket (rotation transmission part) 31k Stopper part (rotation restriction part) 31m Stopper part (rotation restriction part) 64 fastening members 31P Convex end face 31Q Convex end face R1 advance chamber (fluid chamber) R2 retard chamber (fluid chamber)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazumi Ogawa             Aichi, 2-chome, Asahi-cho, Kariya city, Aichi prefecture             Within Seiki Co., Ltd. F term (reference) 3G018 BA33 BA36 DA18 DA73 DA83                       DA85 FA01 FA07 GA02

Claims (2)

[Claims] 1. A housing having a plurality of protrusions on an inner circumference thereof, the housing having a rotation transmission member that rotates in synchronization with one of a rotation shaft of an engine and an intake / exhaust control member for controlling intake / exhaust of the engine, and a housing. On the other hand, a rotor disposed in the housing so as to be relatively rotatable, and rotating in synchronization with the other of the rotation shaft and the intake / exhaust control member; and a fluid chamber formed between the rotor and the housing, A fluid chamber is divided into an advance chamber and a retard chamber, and a vane is provided radially on one of the rotor and the rotation transmission member, and is disposed on one of the protrusions and protrudes with respect to the housing. In a valve opening / closing timing control device including a plate-shaped lock member that retracts and restricts or allows rotation of the rotor, the vane hits a convex portion different from the convex portion on which the lock member is disposed. Contact Valve timing control apparatus characterized in that a rotation restricting portion for restricting the rotation range of the rotor Te. 2. When the rotation range of the rotor is restricted by the rotation restricting part, there is a clearance between the convex part on which the lock member is arranged and the vane. The valve opening / closing timing control device according to claim 1.