JP2015045282A - Valve opening/closing timing control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve opening/closing timing control device capable of simplifying an assembling step.SOLUTION: The valve opening/closing timing control device comprises: a driving side rotation body 1 rotating synchronously with an internal combustion engine shaft; a driven side rotation body 2 rotating integrally with a valve opening/closing cam shaft 10; a fluid pressure chamber 4 between the driving side rotation body 1 and the driven side rotation body 2; a first flow passage 43 and a second flow passage 44 allowing in-flow or out-flow of working fluid to or from the fluid pressure chamber 4 for changing a relative rotation phase of the driving side rotation body 1 and the driven side rotation body 2; and an intermediate member 6 assembled between the driven side rotation body 2 and the cam shaft 10 and coupled to them. One part of the first flow passage 43 is formed between the driven side rotation body 2 and the cam shaft 10, and one part of the second flow passage 44 is formed on the intermediate member 6. The intermediate member 6 is assembled with the driven side rotation body 2 by press-fitting. The device comprises a contact part A at which the intermediate member 6 contacts the driven side rotation body 2 when the intermediate member 6 is assembled with the cam shaft 10 after the intermediate member 6 and the driven side rotation body 2 are assembled with the driving side rotation body 1.

Description

  The present invention is arranged such that a driving side rotating body that rotates synchronously with a driving shaft of an internal combustion engine, and a shaft core that overlaps inside the driving side rotating body, rotate integrally with a valve shaft cam shaft of the internal combustion engine. The present invention relates to a valve opening / closing timing control device including a driven side rotating body.

In the valve opening / closing timing control device, it is desirable that the driven-side rotating body is made of a lightweight material having a small rotational inertia so that the relative rotation phase of the driven-side rotating body with respect to the driving-side rotating body can be easily changed. The side rotating body is generally formed of a low strength material such as an aluminum material. On the other hand, the camshaft connected to the driven side rotating body is generally made of a high-strength material such as iron.
For this reason, a gap is likely to occur at the interface between the driven-side rotating body and the camshaft due to the difference in linear expansion coefficient between the driven-side rotating body and the camshaft, and the high-strength camshaft has a low-strength driven side. Due to the direct contact with the rotating body, the driven-side rotating body is easily damaged.

  In particular, when the flow path of the working fluid for changing the relative rotation phase of the driven side rotating body with respect to the driving side rotating body is formed across the driven side rotating body and the camshaft, the driven side rotating body and the camshaft If there is a gap at the interface, the working fluid may flow through the gap and the relative rotation phase may not be changed in a timely manner.

  In Patent Document 1, the relative rotation phase of the driven-side rotating body relative to the driving-side rotating body and the fluid pressure chamber formed between the driving-side rotating body (housing) and the driven-side rotating body (inner rotor) are maximized. A first flow path and a second flow path that allow the working fluid to flow into or out of the fluid pressure chamber so as to change between an advance angle phase and a most retarded angle phase; A part of the first flow path, comprising: an intermediate member that is assembled between an inner peripheral surface of the driven-side rotator and an outer peripheral surface of the camshaft, and connects the driven-side rotator and the camshaft; Is formed between the driven rotary body and the camshaft, and a part of the second flow path is formed in the intermediate member, and the first flow path and the second flow path are formed. Contact between the intermediate member and the follower-side rotator between the flow path Valve timing control device provided is disclosed. The driven-side rotator is made of an aluminum material, and the intermediate member is made of an iron material.

A valve opening / closing timing control device disclosed in Patent Document 1 is assembled between an inner peripheral surface of a driven-side rotator and an outer peripheral surface of a camshaft, and includes an intermediate member that connects the driven-side rotator and the camshaft. Since it is provided, the driven-side rotating body made of aluminum does not come into contact with the camshaft.
For this reason, even if the camshaft is made of a high-strength material, it is possible to prevent the driven-side rotator that is made of an aluminum material from being damaged.
Further, since the intermediate member is formed of an iron material having a linear expansion coefficient close to that of the high-strength material forming the camshaft, a gap is hardly generated at the interface between the intermediate member and the camshaft. Therefore, even if the working fluid channel is formed across the intermediate member and the camshaft, the working fluid is difficult to leak.
However, the driven-side rotator and cam formed as a result of providing an intermediate member inside the driven-side rotator between the driven-side rotator and the camshaft so that the driven-side rotator and the camshaft do not contact each other. A space between the shaft and the shaft is configured as a part of the first flow path, and a part of the second flow path is formed in the intermediate member.
For this reason, if there is a gap at the interface between the driven rotor and the intermediate member, the working fluid flows through the gap through the first flow path and the second flow path, and the relative rotation phase is adjusted in a timely manner. There is a risk that it cannot be changed.
Therefore, in order to be able to change the relative rotational phase in a timely manner, an abutting portion is provided between the first flow path and the second flow path so that the intermediate member abuts against the driven-side rotator over the entire circumference. The working fluid is prevented from flowing through the first flow path and the second flow path.

JP 2012-57578 A

In the valve opening / closing timing control device disclosed in Patent Document 1, an intermediate member is inserted from one end side of the driven side rotating body between the inner peripheral side of the driven side rotating body and the outer peripheral side of the camshaft.
For this reason, in the process from assembling the driven rotor and intermediate member to the camshaft after assembling the drive rotor, the intermediate member is likely to drop off from the inner peripheral side of the driven rotor, and the assembly process is complicated. There is a risk of becoming.
In addition, when the intermediate member is press-fitted into the driven-side rotator, a gap is formed between the intermediate member and the driven-side rotator due to the resistance during press-fitting. The first and second flow paths communicate with each other through the gap, and the operation deteriorates.

  The present invention has been made in view of the above circumstances, and can prevent the driven-side rotating body from being damaged by a camshaft made of a high-strength material and can operate over the first flow path and the second flow path. It is an object of the present invention to provide a valve opening / closing timing control device capable of simplifying the assembly process while adopting a structure capable of preventing fluid flow.

  The characteristic configuration of the valve opening / closing timing control device according to the present invention is arranged such that a driving side rotating body that rotates synchronously with a driving shaft of an internal combustion engine, and a shaft core that overlaps inside the driving side rotating body, the valve of the internal combustion engine A driven-side rotating body that rotates integrally with the opening / closing camshaft, a fluid pressure chamber defined between the driving-side rotating body and the driven-side rotating body, and the driven-side rotating body with respect to the driving-side rotating body A first flow path that allows working fluid to flow into or out of the fluid pressure chamber so as to change the relative rotational phase of the fluid between the most advanced angle phase and the most retarded angle phase; An intermediate member that is assembled between the second flow path and the inner peripheral surface of the driven-side rotator and the outer peripheral surface of the camshaft, and connects the driven-side rotator and the camshaft; The space constituting a part of the first flow path is the driven side rotation. And a portion of the second flow path is formed in the intermediate member, and the intermediate member is assembled by press-fitting into the driven side rotating body, When the intermediate member is assembled to the camshaft after the intermediate member and the driven-side rotator are assembled to the drive-side rotator, the intermediate member is interposed between the first flow path and the second flow path. The member is provided with an abutting portion that abuts on the driven side rotating body.

The contact portion provided in the valve opening / closing timing control device of this configuration is configured such that the intermediate member is assembled by press-fitting into the driven-side rotator, and the intermediate member and the driven-side rotator are attached to the drive-side rotator. After the assembly, when the intermediate member is assembled to the camshaft, the intermediate member abuts on the driven side rotating body between the first flow path and the second flow path.
For this reason, when the driven-side rotator and the intermediate member are assembled to the drive-side rotator, the intermediate member is pressed into the driven-side rotator. For example, the intermediate member is bonded to the driven-side rotator with an adhesive. Or before the driven side rotating body and the intermediate member are assembled to the camshaft, without causing trouble such as adsorption by the magnetic force of the magnet, the friction force is applied between the driven side rotating body and the intermediate member, It is possible to provide resistance against dropping of the intermediate member from the driven side rotating body.
Accordingly, it is possible to prevent the intermediate member from dropping from the driven-side rotator in the process from assembling the driven-side rotator and the intermediate member to assembling the camshaft.

  Therefore, the valve opening / closing timing control device of this configuration can prevent the driven rotor from being damaged by the camshaft made of a high-strength material, and can also operate the working fluid over the first flow path and the second flow path. It is possible to simplify the assembly process while adopting a structure that can prevent the circulation.

  Another feature of the present invention lies in that a control valve that switches inflow of the working fluid into the fluid pressure chamber and outflow from the fluid pressure chamber is provided radially inward of the intermediate member.

  With this configuration, the length of the flow path for the working fluid to flow into and out of the fluid pressure chamber can be shortened and the control valve can be assembled compactly compared to when the control valve is provided outside the camshaft. Can be reduced, and the processing time of the flow path can be reduced.

  Another characteristic configuration of the present invention is that the intermediate member is press-fitted into a partial region of an inner wall provided in the driven-side rotating body.

With this configuration, the processing range necessary for press-fitting the intermediate member into the driven side rotating body is narrowed,
The number of processing steps can be reduced.

  Another characteristic configuration of the present invention is that the intermediate member is press-fitted at predetermined intervals at a plurality of locations along the circumferential direction with respect to the shaft core on the inner wall provided on the driven-side rotating body.

  With this configuration, it is possible to further narrow the processing range required for press-fitting the intermediate member into the driven-side rotating body, thereby reducing the processing man-hours.

It is sectional drawing which shows the whole structure of a valve timing control apparatus. It is II-II sectional drawing in FIG. It is detail drawing which shows the state of OCV at the time of advance angle control. It is detail drawing which shows the state of OCV at the time of retard control. It is a disassembled perspective view which shows the structure of a valve opening / closing timing control apparatus. It is sectional drawing which shows the whole structure of the valve timing control apparatus of 2nd Embodiment. It is a perspective view explaining 3rd Embodiment.

Embodiments of the present invention will be described below with reference to the drawings as a valve opening / closing timing control device for controlling the opening / closing timing of an intake valve in an automobile engine.
[First Embodiment]
1 to 5 show a first embodiment of a valve timing control apparatus according to the present invention.
〔overall structure〕
As shown in FIGS. 1 and 2, the valve timing control apparatus includes an aluminum alloy driving side rotating body (housing) 1 that rotates synchronously with a crankshaft (not shown) of an automobile engine, and a driving side rotating body 1. It is arranged in a state in which the shaft core X overlaps inside, and includes a camshaft 10 for opening and closing the intake valve of the engine and a driven-side rotating body (internal rotor) 2 made of aluminum alloy that rotates integrally.

The driven side rotator 2 is supported so as to be rotatable relative to the drive side rotator 1.
The camshaft 10 is configured in a series of shafts by a camshaft main body 10a and a steel OCV bolt 10b that is concentrically inserted into the driven-side rotating body 2 and screwed to the camshaft main body 10a. .
The automobile engine corresponds to the “internal combustion engine”, and the crankshaft corresponds to the “drive shaft of the internal combustion engine”.

Between the inner peripheral surface of the driven-side rotator 2 and the outer peripheral surface of the OCV bolt 10b, press-fit into the concentric shape from the camshaft body 10a side to the inner side of the driven-side rotator 2, and assembled. Thus, a cylindrical steel intermediate rotating member (intermediate member) 6 for transmitting the rotation of the driven side rotating body 2 to the OCV bolt 10b is provided.
The OCV bolt 10b is inserted into the driven-side rotating body 2 and the intermediate rotating member 6 and screwed to the end of the camshaft main body 10a. The intermediate rotating member 6 connects the driven-side rotating body 2 and the camshaft 10 to each other. It is connected.
The camshaft main body 10a is a rotating shaft of a cam (not shown) that controls the opening and closing of the intake valve of the engine, and rotates integrally with the driven-side rotating body 2, the intermediate rotating member 6, and the OCV bolt 10b. The camshaft main body 10a is rotatably assembled to a cylinder head of an engine (not shown).

[Driving side rotating body and driven side rotating body]
The driving-side rotator 1 is a rear that integrally includes a front plate 11 opposite to the side to which the camshaft body 10a is connected, an external rotor 12 that is externally mounted on the driven-side rotator 2, and a timing sprocket 15. The plate 13 is assembled. A driven-side rotator 2 is accommodated in the drive-side rotator 1, and a fluid pressure chamber 4 is formed between the driven-side rotator 2 and the external rotor 12 as described later.

  When the crankshaft is rotationally driven, the rotational power is transmitted to the timing sprocket 15 via the power transmission member 101, and the drive side rotator 1 is rotationally driven in the rotational direction S shown in FIG. As the drive-side rotator 1 is driven to rotate, the driven-side rotator 2 is driven to rotate in the rotational direction S to rotate the camshaft 10, and the cam provided on the camshaft body 10a pushes down the intake valve of the engine to open it. Let me speak.

  As shown in FIG. 2, a plurality of projecting portions 14 projecting in the radially inward direction are formed on the inner side of the outer rotor 12 so as to be spaced apart from each other along the rotational direction S. A fluid pressure chamber 4 is defined between the two. The protruding portion 14 also functions as a shoe for the outer peripheral surface of the driven side rotating body 2. A protruding portion 21 is formed on a portion of the outer peripheral surface of the driven side rotating body 2 facing the fluid pressure chamber 4. The fluid pressure chamber 4 is divided into an advance chamber 41 and a retard chamber 42 along the rotation direction S by the protrusion 21. In the present embodiment, the fluid pressure chamber 4 is configured to have four locations, but the present invention is not limited to this.

  Oil is supplied to or discharged from the advance chamber 41 and the retard chamber 42, or the supply and discharge of the oil is shut off, and hydraulic pressure is applied to the protrusion 21. In this way, the relative rotational phase is displaced in the advance angle direction or the retard angle direction, or held at an arbitrary phase. The advance direction is a direction in which the volume of the advance chamber 41 is increased, and is indicated by an arrow S1 in FIG. The retardation direction is a direction in which the volume of the retardation chamber 42 increases, and is indicated by an arrow S2 in FIG. The relative rotation phase when the volume of the advance chamber 41 is maximized is the most advanced phase, and the relative rotation phase when the volume of the retard chamber 42 is maximized is the most retarded phase.

[Lock mechanism]
The valve opening / closing timing control device constrains the relative rotational movement of the driven-side rotator 2 with respect to the drive-side rotator 1, thereby setting the relative rotation phase of the driven-side rotator 2 relative to the drive-side rotator 1 to the most advanced angle phase. A lock mechanism 8 that can be restrained to a predetermined lock phase between the retard angle phase and the retard angle phase is provided. By restraining the relative rotational phase to the lock phase in a situation where the oil pressure of the oil immediately after engine startup is not stable, the rotational phase of the camshaft 10 with respect to the rotational phase of the crankshaft is properly maintained, and stable engine rotation is achieved. Can be realized.

  As shown in FIG. 2, the lock member 81 is configured to be movable along the axial direction, and is engaged with a lock groove (not shown) formed in the front plate 11 or the rear plate 13 by a biasing member (not shown). By being held in this state, the locked state is maintained. A lock oil passage 82 formed in the driven-side rotator 2 connects the lock mechanism 8 and an advance oil passage 43 described later, and advances the relative rotation phase of the driven-side rotator 2 with respect to the drive-side rotator 1. When the advance angle control for displacing in the angular direction S1 is performed, hydraulic pressure is applied to the lock mechanism 8. As a result, the lock member 81 moves out of the lock groove against the urging force of the urging member, and the locked state is released.

[OCV (oil control valve)]
As shown in FIG. 1, an OCV 51 as a “control valve” that switches between the inflow of oil into the fluid pressure chamber 4 and the outflow from the fluid pressure chamber 4 is coaxial with the camshaft 10 inward in the radial direction of the intermediate rotating member 6. Prepared above. The OCV 51 includes a spool 52, a spring 53 that biases the spool 52, and an electromagnetic solenoid 54 that drives the spool 52.
The spool 52 is accommodated in an accommodation space 5a formed at the tip of the OCV bolt 10b, and is slidable along the axis X inside the accommodation space 5a. Since the electromagnetic solenoid 54 is a known technique, a detailed description thereof will be omitted.

  The spring 53 is disposed in the inner part of the accommodation space 5a, and always urges the spool 52 to the side opposite to the camshaft body 10a. When power is supplied to the electromagnetic solenoid 54, a push pin 54 a provided on the electromagnetic solenoid 54 presses the rod portion 52 a formed on the spool 52. As a result, the spool 52 slides toward the camshaft body 10 a against the urging force of the spring 53. The OCV 51 is configured so that the position of the spool 52 can be adjusted by adjusting the duty ratio of the power supplied to the electromagnetic solenoid 54. The amount of power supplied to the electromagnetic solenoid 54 is controlled by an ECU (electronic control unit) (not shown).

[Intermediate rotating member and washer member]
As shown in FIG. 5, the intermediate rotating member 6 is formed in a cylindrical shape, and is internally provided on the camshaft main body 10 a side (the right side in the drawing) inside the driven-side rotating body 2. A washer member 7 is housed on the side (left side in the figure) opposite to the camshaft main body 10a side of the driven side rotating body 2. The intermediate rotating member 6 and the washer member 7 are internally provided on the driven side rotating body 2, and the OCV bolt 10b is attached to each member in a state where the driving side rotating body 1 (not shown in FIG. 5) is externally mounted on the driven side rotating body 2. It is inserted into the center hole and screwed into the camshaft body 10a. Then, as shown in FIG. 1, between the advance oil passage 43 and the retard oil passage 44, the intermediate rotation member 6 and the driven-side rotator 2 abut on the entire circumference in the axial direction. Part A is formed.
Therefore, when the intermediate rotating member 6 is assembled to the camshaft 10 after the intermediate rotating member 6 and the driven rotating body 2 are assembled to the driving side rotating body 1, the abutting portion A is not connected to the advance oil passage 43 and the retarding oil passage 43. The intermediate rotating member 6 contacts the driven-side rotating body 2 between the square oil passage 44 and the driven oil rotating body 2.

  The washer member 7 has a function of increasing the fastening force of the OCV bolt 10b to the camshaft main body 10a. A torsion spring 9 is mounted across the washer member 7 and the front plate 11 to urge the driven-side rotator 2 to rotate in the advance direction S1 with respect to the drive-side rotator 1.

The outer peripheral surface of the intermediate rotating member 6 has an outer diameter that is longer than the inner diameter of the cylindrical inner wall 2a provided on the driven-side rotating body 2 so as to insert the intermediate rotating member 6 over the entire length along the axis X. A fitting portion 20 is formed which has a slightly larger outer diameter and is fitted over the entire inner peripheral surface of the driven side rotating body 2.
Therefore, the intermediate rotating member 6 is assembled integrally with the driven side rotating body 2 by press-fitting the driven side rotating body 2 in the fitting portion 20.

The fitting pressure with respect to the driven side rotating body 2 of the fitting part 20 is such that the OCV bolt 10b inserted through the washer member 7, the driven side rotating body 2 and the intermediate rotating member 6 from the front plate 11 side is applied to the camshaft main body 10a. The pressure is set such that the intermediate rotating member 6 can be forcibly moved so as to come into contact with the driven-side rotating body 2 when screwed.
For this reason, between the advance oil passage 43 and the retard oil passage 44, the intermediate rotation member 6 is reliably brought into contact with the driven-side rotator 2 over the entire circumference, and the advance oil passage 43 Oil flow through the retarded oil passage 44 can be prevented.

  When the driven side rotating body 2 and the intermediate rotating member 6 are assembled inside the driving side rotating body 1, the fitting portion 20 applies a certain amount of frictional force between the driven side rotating body 2 and the intermediate rotating member 6. The intermediate rotating member 6 is prevented from dropping from the driven side rotating body 2 until the intermediate rotating member 6 is assembled to the driven side rotating body 2 and then the camshaft 10 is connected to the intermediate rotating member 6. To give resistance.

(Oil channel configuration)
As shown in FIG. 1, the oil stored in the oil pan 61 is pumped up by a mechanical oil pump 62 that is driven by transmission of the rotational driving force of the crankshaft, and is supplied to a supply oil passage 45 described later. Is done. Then, the supply of oil to the advance oil passage 43 and the retard oil passage 44, and the shutoff of supply / discharge are switched by the control of the OCV 51.

The advance oil passage 43 is an oil passage for changing the relative rotation phase between the drive side rotor 1 and the driven side rotor 2 to the advance direction S1. The retarding oil passage 44 is an oil passage for changing the relative rotational phase between the driving side rotating body 1 and the driven side rotating body 2 to the other retarding direction S2.
Therefore, the advance oil passage 43, the retard oil passage 44, and the supply oil passage 45 have a relative rotation phase of the driven-side rotator 2 with respect to the drive-side rotator 1 between the most advanced angle phase and the most retarded angle phase. In order to change, it corresponds to a flow path that alternatively allows oil to flow into or out of the fluid pressure chamber 4, and the advance oil passage 43 of which corresponds to the first flow path The retarded oil passage 44 corresponds to the second flow passage.

  As shown in FIGS. 1 and 2, an advance oil passage 43 connected to each advance chamber 41 is formed between a through hole 43 a formed in the OCV bolt 10 b and between the OCV bolt 10 b and the driven side rotating body 2. The first annular oil passage 43b and the through hole 43c formed in the driven side rotating body 2 are configured. Therefore, a space constituting the first annular oil passage 43b, which is a part of the advance oil passage 43, is defined between the driven-side rotating body 2 and the OCV bolt 10b.

  A retard oil passage 44 connected to each retard chamber 42 is formed on a through hole 44a formed in the OCV bolt 10b and on an inner peripheral surface of the intermediate rotating member 6 between the OCV bolt 10b and the intermediate rotating member 6. The two annular oil passages 44b, a through hole 44c formed in the intermediate rotating member 6, and a through hole 44d formed in the driven side rotating body 2 are configured. Therefore, a second annular oil passage 44 b and a through hole 44 c that constitute a part of the retard oil passage 44 are formed in the intermediate rotation member 6.

  Furthermore, a supply oil passage 45 for supplying oil to the advance chamber 41 or the retard chamber 42 includes a passage 45a formed in the camshaft body 10a, a passage 45b formed in the intermediate rotation member 6, the intermediate rotation member 6 and the OCV. A third annular passage 45c formed on the intermediate rotating member 6 side between the bolt 10b and a through hole 45d formed in the OCV bolt 10b.

  Therefore, the intermediate rotating member 6 includes the second annular oil passage 44b, the through hole of the advance oil passage 43, the retard oil passage 44 and the supply oil passage 45 that supply and discharge oil to and from the fluid pressure chamber 4. 44c, a passage 45b and a third annular passage 45c are provided.

  The oil flowing through the supply oil passage 45 first flows into an annular groove 52 b formed on the outer peripheral surface of the spool 52. As shown in FIG. 1, when the annular groove 52b does not communicate with the through hole 43a and the through hole 44a formed in the OCV bolt 10b, no oil is supplied to the advance chamber 41 and the retard chamber 42. In this state, the through hole 43a is configured not to communicate with the through hole 52c formed in the spool 52, so that the oil in the advance chamber 41 has the advance oil passage 43, the through hole 52c, the accommodation space 5a, and It is not discharged out of the apparatus via the discharge hole 52d. Similarly, in this state, since the through hole 44a is configured not to communicate with the accommodation space 5a, the oil in the retardation chamber 42 passes through the retardation oil passage 44, the accommodation space 5a, and the discharge hole 52d. It is not discharged outside the device. That is, when a predetermined amount of power is supplied to the electromagnetic solenoid 54 and the OCV 51 is controlled so as to hold the spool 52 in the position shown in FIG. 1, the oil supply / discharge to the advance chamber 41 and the retard chamber 42 is interrupted, The relative rotational phase is maintained.

  When power is not supplied to the electromagnetic solenoid 54, the spool 52 is held at the position shown in FIG. In this state, the annular groove 52b of the spool 52 communicates with the through hole 43a formed in the OCV bolt 10b and does not communicate with the through hole 44a. At the same time, the through hole 44a communicates with the accommodation space 5a. Therefore, the oil supplied to the supply oil passage 45 is supplied to the advance chamber 41 via the advance oil passage 43, and the oil in the retard chamber 42 is the retard oil passage 44, the accommodating space 5a, and the discharge hole 52d. It is discharged out of the device via At this time, the relative rotation phase is displaced in the advance direction S1 by the hydraulic pressure acting on the advance chamber 41.

  When maximum power is supplied to the electromagnetic solenoid 54, the spool 52 is held at the position shown in FIG. 4 against the urging force of the spring 53. In this state, the annular groove 52b of the spool 52 communicates with the through hole 44a formed in the OCV bolt 10b and does not communicate with the through hole 43a. At the same time, the through hole 43a communicates with a through hole 52c formed in the spool. Accordingly, the oil supplied to the supply oil passage 45 is supplied to the retard chamber 42 via the retard oil passage 44, and the oil in the advance chamber 41 is the advance oil passage 43, the through hole 52c, the accommodation space 5a, And it is discharged out of the apparatus via the discharge hole 52d. At this time, the relative rotational phase is displaced in the retarding direction S2 by the hydraulic pressure acting on the retarding chamber 42.

[Second Embodiment]
FIG. 6 shows another embodiment of the present invention.
In the present embodiment, the fitting portion 20 is in contact with a part of the intermediate rotating member 6 in the direction along the axis X of the cylindrical inner wall 2a, specifically, with the formation portion of the retarded oil passage 44. The outer peripheral surface of the portion of the intermediate rotating member 6 that protrudes closer to the rear plate 13 than the driven rotating body 2 of the intermediate rotating member 6 is configured to be press-fitted and fitted only in the region between the contact portion A and the rear plate. 13 is in close contact with the shaft 13 so as to be rotatable relative thereto.

  That is, when the fitting portion 20 is configured to be fitted only in a region between the formation portion of the retarded oil passage 44 and the contact portion A in the cylindrical inner wall 2a, the driven side rotation of the intermediate rotation member 6 is performed. The advance oil passage 43 and the retard oil passage 44 communicate with each other through the interface between the intermediate rotation member 6 and the driven side rotation body 2 by the close contact at the fitting portion 20 and the close contact at the contact portion A with respect to the body 2. Can be prevented.

On the other hand, if a gap is formed between the outer peripheral surface of the portion of the intermediate rotating member 6 that protrudes toward the rear plate 13 relative to the portion where the retarded oil passage 44 is formed, and the rear plate 13, the intermediate rotating member There is a risk that the oil may flow out from the retarded oil passage 44 formed across 6 and the driven-side rotator 2. For this reason, the outer peripheral surface of the intermediate rotating member 6 is in close contact with the rear plate 13 so as to be rotatable relative to the rear plate 13, thereby preventing oil from flowing out from the retarded oil passage 44.
Other configurations are the same as those of the first embodiment.

[Third Embodiment]
FIG. 7 shows another embodiment of the present invention.
In the present embodiment, as in FIG. 6 showing the second embodiment, the outer peripheral surface of the portion of the intermediate rotating member 6 that protrudes closer to the rear plate 13 than the driven-side rotating body 2 is located with respect to the rear plate 13. The oil is prevented from flowing out from the retarded oil passage 44 by being in close contact with each other so as to be relatively rotatable.
And the fitting part 20 formed in the outer peripheral surface of the intermediate | middle rotating member 6 so that it may fit with respect to the cylindrical inner wall 2a of the driven side rotary body 2 makes the intermediate rotating member 6 the axial center of the cylindrical inner wall 2a. It is formed so as to be dispersed and press-fitted at a plurality of predetermined intervals along the circumferential direction with respect to X.

  That is, an inner diameter portion 20a that is slightly smaller than the inner diameter of the cylindrical inner wall 2a is formed with the same width in each of, for example, three portions of the cylindrical inner wall 2a of the driven side rotating body 2 that are spaced apart at equal intervals in the circumferential direction. Thus, the intermediate rotating member 6 is provided with a fitting portion 20 in which the intermediate rotating member 6 is press-fitted into the cylindrical inner wall 2a at equal intervals and fitted.

According to this embodiment, while narrowing the processing range for the intermediate rotating member 6, the three outer diameter portions 6a are securely brought into pressure contact with the cylindrical inner wall 2a to rotate the intermediate rotating member 6 on the driven side. The core 2 can be accurately positioned concentrically.
The fitting portion 20 forms an inner diameter portion 20a that is slightly smaller than the inner diameter of the cylindrical inner wall 2a at each of a plurality of locations that are spaced apart at unequal intervals in the circumferential direction, and the intermediate rotating member 6 is formed into the cylindrical inner wall 2a. May be provided so as to be press-fitted at unequal intervals.
Other configurations are the same as those of the first embodiment.

[Other Embodiments]
1. The valve opening / closing timing control device according to the present invention may be a valve opening / closing timing control device that controls the opening / closing timing of the exhaust valve.
2. The valve opening / closing timing control apparatus according to the present invention can be used in a valve opening / closing timing control apparatus for an automobile or other internal combustion engine.

DESCRIPTION OF SYMBOLS 1 Drive side rotary body 2 Driven side rotary body 2a Cylindrical inner wall 4 Fluid pressure chamber 43 1st flow path (advance oil path)
44 Second flow path (retarded oil path)
6 Intermediate member 10 Camshaft 20 Fitting part 51 Control valve A Contact part X Axle core

Claims (4)

A drive-side rotating body that rotates synchronously with the drive shaft of the internal combustion engine;
A driven side rotating body that is arranged in a state where the shaft core overlaps inside the driving side rotating body, and rotates integrally with a camshaft for opening and closing the valve of the internal combustion engine;
A fluid pressure chamber defined between the driving side rotating body and the driven side rotating body;
The working fluid flows into the fluid pressure chamber or from the fluid pressure chamber so as to change the relative rotation phase of the driven side rotor with respect to the drive side rotor between the most advanced angle phase and the most retarded angle phase. A first flow path and a second flow path that allow outflow;
An intermediate member that is assembled between an inner peripheral surface of the driven-side rotator and an outer peripheral surface of the camshaft, and connects the driven-side rotator and the camshaft;
A space constituting a part of the first flow path is defined between the driven rotary body and the camshaft, and a part of the second flow path is formed in the intermediate member, When the intermediate member is assembled to the driven-side rotating body by press-fitting, and after the intermediate member and the driven-side rotating body are assembled to the driving-side rotating body, the intermediate member is assembled to the camshaft. A valve opening / closing timing control device comprising a contact portion between the first flow path and the second flow path, where the intermediate member is in contact with the driven rotating body.   2. The valve opening / closing timing control device according to claim 1, further comprising a control valve that switches between the inflow of the working fluid into the fluid pressure chamber and the outflow from the fluid pressure chamber, radially inward of the intermediate member.   3. The valve opening / closing timing control device according to claim 1, wherein the intermediate member is press-fitted into a partial region of an inner wall provided on the driven side rotating body.   4. The valve opening / closing timing control device according to claim 3, wherein the intermediate member is press-fitted at predetermined intervals at a plurality of locations along the circumferential direction with respect to the shaft core in an inner wall provided on the driven side rotating body.

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