JP2003129805A - Valve timing control device for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate unnecessary play of each part resulting from alternate torque or the like, and to prevent generation of abnormal noise and vibration. SOLUTION: By rotating an intermediate rotating body 23, an end portion of a link 14 which is engaged with a spiral groove 24 of the rotating body 23 via a ball 19 is displaced along a radial groove 24, and such displacement is converted via the link 14 into relative rotation between a drive plate 3 and a lever shaft 10. In such a device, a planetary roller mechanism 28 with no backlash is provided, a sun roller 29 is integrally formed in an inner peripheral edge of the intermediate rotating body 23, and a carrier plate 31 is integrally connected to the lever shaft 10. Furthermore, a first electromagnetic brake 26 for applying braking force to the intermediate rotating body 23 and a second electromagnetic brake 26 for applying braking force to an outer roller 30 are provided. Then, the intermediate rotating body 23 is braked to decelerate the rotating body 23, and the outer roller 30 is braked to accelerate the rotating body 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve timing control device for an internal combustion engine, which makes variable the opening / closing timing of an intake-side or exhaust-side engine valve of the internal combustion engine according to operating conditions.

[0002]

2. Description of the Related Art This type of valve timing control device is
In the power transmission path from the crankshaft to the camshaft, the opening / closing timing of the engine valve is controlled by operating the rotation phases of both shafts. That is, in this type of device, a driving rotary body connected to a crankshaft via a timing chain or the like is assembled so that the driven rotary body on the camshaft side can relatively rotate as needed, and these rotary bodies are An assembly angle operation mechanism is interposed between the two to operate the assembly angle, and by appropriately controlling the drive of this assembly angle operation mechanism, the rotation phases of the crankshaft and the camshaft are changed. There is.

Various means such as motors and hydraulic actuators have been used as means for driving and operating the assembling angle operation mechanism. In recent years, a means using an electromagnetic brake and a planetary gear mechanism has been devised. Has been done. This valve timing control device basically obtains the operating force by the braking force of the electromagnetic brake, but the planetary gear mechanism interposed between the electromagnetic brake and the assembly angle operating mechanism controls the braking force of the electromagnetic brake. Switching between forward and reverse force,
The torque is appropriately amplified.

Incidentally, this related technique is disclosed, for example, in Japanese Patent Laid-Open No. 9-
No. 177,516 and the like.

[0005]

However, in the case of this conventional valve timing control device, since the planetary gear mechanism is used in the operation force input portion linked to the assembly angle operation mechanism, the drive cam is operated during engine operation. When the torque fluctuation (hereinafter referred to as "alternating torque") due to the profile of the valve and the spring force of the valve spring is input to the assembly angle operation mechanism through the camshaft, the meshing gear elements of the planetary gear mechanism move back. There is a problem of rattling due to rush, and abnormal noise and vibration at this time.

Therefore, the present invention is intended to provide a valve timing control device for an internal combustion engine which can prevent rattling of each part due to alternating torque and the like and can reliably prevent generation of abnormal noise and vibration. .

[0007]

As a means for solving the above-mentioned problems, the present invention is directed to a drive rotating body which is rotationally driven by a crankshaft of an internal combustion engine, and a camshaft or a separate body connected to the shaft. Consisting of members,
A valve timing control device for an internal combustion engine, comprising: a driven rotating body to which power is transmitted from the drive rotating body; and an assembly angle operating mechanism that operates an assembly angle of the drive rotating body and the driven rotating body. The force is applied to the assembly angle operation mechanism via the planetary roller mechanism. In this case, since the power is transmitted between the rotating elements of the planetary roller mechanism by frictional contact, there is no rattling as in the case of transmitting the power by meshing the gears.

Further, the present invention comprises a driving rotating body which is rotationally driven by a crankshaft of an internal combustion engine, and a camshaft or a separate member connected to the shaft,
A driven rotary body to which power is transmitted from the drive rotary body, a radial guide provided on one of the drive rotary body and the driven rotary body, and relative rotation with respect to the drive rotary body and the driven rotary body An intermediate rotating body having a spiral guide on a surface facing the radial guide, a movable guide portion displaceably guided and engaged with the radial guide and the spiral guide, and the drive rotation. A link that swingably connects the movable guide portion and a portion that is separated from the center of rotation of the other of the body and the driven rotary body, and the intermediate rotary body with respect to the drive rotary body and the driven rotary body. By rotating the movable guide portions engaged with the spiral guides, the movable guide portions are displaced in the radial direction along the radial guides, and the displacements are relatively rotated between the drive rotor and the driven rotor via the links. Internal Combustion Engine Converted to Motion In the valve timing control device, the planetary roller mechanism, a first electromagnetic brake that operates the intermediate rotor in the deceleration direction by applying a braking force to one coaxial rotating element of the planetary roller mechanism, and the planetary roller mechanism. A second electromagnetic brake for operating the intermediate rotating body in a speed-up direction by applying a braking force to another coaxial rotating element, and the intermediate rotating body serves as one coaxial rotating element of the planetary roller mechanism. I made it one.

Specifically, for example, a carrier supporting a planetary roller of a planetary roller mechanism is fixed to a driven rotating body or a driving rotating body, and a sun roller and an outer roller of the planetary roller mechanism which make frictional contact with the outer peripheral surface of the planetary roller. In addition, one of the braking force acting portion of the first electromagnetic brake and the braking force acting portion of the second electromagnetic brake is provided, and the intermediate rotating body is integrated with one of the sun roller and the outer roller.

In this case, since power is transmitted by frictional contact between the rotating elements of the planetary roller mechanism, rattling does not occur at the power transmitting portion. In addition, a moment that causes tilt is input to the intermediate rotating body through the engaging portion with the movable guide portion, but since the intermediate rotating body is integrated with one coaxial rotating element of the planetary roller mechanism, The inclination of the rotating body is suppressed by the planetary roller mechanism.

Further, a hollow ring portion having a substantially U-shaped cross-section whose one end in the axial direction is opened is provided on the outer periphery of the shaft portion of the planetary roller, and the outer peripheral wall of the hollow ring portion is opened from the U-shaped root portion to the opening portion. It is preferable to form the outer diameter so that it extends toward the side. In this case, the planetary roller can be assembled easily by elastically deforming the outer peripheral wall of the hollow ring portion by press-fitting between the sun roller and the outer roller from the U-shaped root side of the hollow ring portion. After assembling the planetary roller in this way, the hollow ring is pressed against the sun roller and the outer roller by its elasticity, so it is possible to eliminate the gap between the contact parts of the rollers and prevent the rattling and the slippage at the friction contact part. it can.

Further, an annular notch may be provided on the outer periphery of the root portion of the outer peripheral wall of the hollow ring portion.
In this case, it is possible to reduce the outer diameter of the root part of the hollow ring part and reduce the rigidity of that part, so the workability of inserting the planetary roller when assembling the planetary roller between the sun roller and the outer roller is improved. Can be good.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. Incidentally, this embodiment applies the valve timing control device according to the present invention to the power transmission system on the intake side of an internal combustion engine, but it can also be applied to the power transmission system on the exhaust side of the internal combustion engine in the same manner. Is.

As shown in FIG. 1, the valve timing control device includes a cam shaft 1 rotatably supported by a cylinder head (not shown) of an internal combustion engine, and a front end portion of the cam shaft 1 as required. A drive plate 3 (a drive rotating body in the present invention) having a timing sprocket 2 on the outer periphery, which is assembled so as to be relatively rotatable and is linked to a crankshaft (not shown) via a chain (not shown), and An assembly angle operation mechanism 5 arranged on the front side (left side in FIG. 1) of the drive plate 3 and the camshaft 1 for rotating the assembly angle of the both 3, 1 and this assembly angle operation mechanism 5. Further, the operating force imparting means 4 is disposed on the front side and drives the mechanism 5, and the assembly angle operating mechanism 5 and the operating force are mounted across the cylinder head (not shown) of the internal combustion engine and the front surface of the rocker cover. VTC covering the front and periphery region of given means 4
And a cover 12.

The drive plate 3 is formed in a disk shape having an insertion hole 6, and a lever shaft 10 (a driven rotary member in the present invention) integrally connected to the front end portion of the cam shaft 1 is provided in the insertion hole 6 portion. It is assembled so that it can rotate. Then, on the front surface of the drive plate 3 (the surface opposite to the camshaft 1), as shown in FIG. 2, three radial grooves 8 (radial guides in the present invention) are arranged along the radial direction of the plate 3. Is formed.

Further, as shown in FIG. 1, the lever shaft 10 has a large-diameter flange portion 7 formed on the outer periphery of the base side which is abutted against the front end portion of the camshaft 1, and is larger than the large-diameter flange portion 7. Three levers 9 that radially protrude are integrally formed on the outer surface on the front side for a predetermined distance, and are coupled to the camshaft 1 by bolts 13 that penetrate the shaft center portion. The base end of a link 14 is pivotally connected to each lever 9 of the lever shaft 10 by a pin 15, and the tip of each link 14 is a cylindrical protrusion that slidably engages with each radial groove 8. 17 is integrally formed.

Since each link 14 is connected to the lever shaft 10 through the pin 15 in the state where the protrusion 17 is engaged with the corresponding radial groove 8, the tip end side of the link 14 receives an external force and is radially connected. When displaced along the direction groove 8, the drive plate 3 and the lever shaft 10 are relatively rotated by the action of the link 14 by a direction and an angle corresponding to the displacement of the protrusion 17.

A through hole 1 is formed at the tip of each link 14 so as to extend axially from the link body to the protrusion 17.
8 is formed, and a separate plate-shaped sealing member 16 is press-fitted and fixed to the end of the through hole 18 on the side of the protruding portion 17. The through hole 18 accommodates a sphere 19 that is engaged with a spiral groove 24, which will be described later, and a substantially cylindrical retainer 20 that supports the spine of the sphere 19, and also retains the retainer 20 and the sealing member 16. A coil spring 21 that is interposed between the coil springs 21 and biases the ball 19 forward is housed. In the case of this embodiment, the movable guide is formed by the protrusion 17 at the tip of the link 14 and the ball 1.
It is composed of 9.

On the other hand, on the front side of the protruding position of the lever 9 of the lever shaft 10, a substantially disc-shaped intermediate rotating body 23 is rotatably supported. A spiral groove 24 having a semicircular cross section (a spiral guide in the present invention) is formed on the rear surface of the intermediate rotor 23, and the sphere 19 held at the tip of each link 14 is formed in the spiral groove 24. It is rotatably engaged. The spiral of the spiral groove 24 is formed so as to gradually reduce its diameter along the rotation direction R of the drive plate 3 as shown in FIGS. 2, 6 and 7. Therefore, when the intermediate rotating body 23 relatively rotates in the delay direction with respect to the drive plate 3 with the ball 19 of each link 14 engaged with the spiral groove 24, the tip of the link 14 follows the spiral shape of the spiral groove 24. Move inward in the radial direction, and conversely, the intermediate rotor 23
When is relatively rotated in the advancing direction, it moves outward in the radial direction.

The assembling angle operation mechanism 5 of this embodiment includes the radial groove 8 of the drive plate 3 described above, the link 14 including the protruding portion 17, the ball 19, the lever 9, the spiral groove 24 of the intermediate rotor 23, and the like. It is composed by. In this assembly angle operation mechanism 5, when a relative rotational operation force with respect to the cam shaft 1 is input from the operation force application means 4 to the intermediate rotating body 23, the operation force is engaged with the spiral groove 24 and the ball 19. The tip of the link 14 is displaced in the radial direction through the portion, and at this time, the relative rotational force is transmitted to the drive plate 3 and the cam shaft 1 by the action of the link 14 and the lever 9.

On the other hand, the operating force applying means 4 is provided with first and second electromagnetic brakes 26 and 27 and a planetary roller mechanism 28. By switching the operation of the electromagnetic brakes 26 and 27, the operating force applying means 4 is decelerated with respect to the intermediate rotor 23. The force and the force in the acceleration direction can be selectively applied as appropriate.

The planetary roller mechanism 28 is shown in FIGS. 1, 3 and 4.
As shown in FIG. 7, a sun roller 29 (coaxial rotation element) integrally formed on the inner peripheral edge of the intermediate rotating body 23 so as to project forward in the axial direction, and an outer roller 30 rotatably arranged on the outer peripheral side of the sun roller 29. (Coaxial rotation element), disk-shaped carrier plate 31 (coaxial rotation element) press-fitted and fixed to the tip of the lever shaft 10, and rotatably supported by the carrier plate 31 and the sun roller 29.
A plurality of planetary rollers 32 interposed between the outer roller 30 and the outer roller 30 and frictionally contacting the outer peripheral surface and the inner peripheral surface thereof.
It is composed of and. In the intermediate rotating body 23, a bush 33 having a substantially L-shaped cross section is press-fitted and fixed to the inner peripheral surface of the sun roller 29, and the lever shaft 10 is inserted through the bush 33.
Is rotatably supported on the outer peripheral surface of the tip end side. The outer peripheral edge of the carrier plate 31 is slidably and rotatably engaged with an annular recess 30a formed in the inner peripheral edge of the front end of the outer roller 30, and regulates radial displacement and axial displacement of the outer roller 30. In this state, the roller 30 is supported by a bearing.

Therefore, the planetary roller mechanism 28 is
The outer roller 30 is now in a free rotation state, and the planetary roller 32 does not rotate but the carrier plate 31
If it revolves with the outer roller 30 and the sun roller 29, the carrier plate 31 (lever shaft 1
0), the outer roller 3 rotates integrally with the outer roller 3 at the same speed, but if the braking force is applied only to the outer roller 30 from this state,
When 0 rotates relative to the carrier plate 31 in the delay direction, the planetary roller 32 rotates, and the rotation of the planetary roller 32 speeds up the sun roller 29 to increase the intermediate rotor 23 relative to the drive plate 3. Rotate relatively to the fast side.

Further, in the case of this embodiment, each planetary roller 32 has a hollow ring portion 32b having a substantially U-shaped cross section whose one end in the axial direction is opened and which rotates around the outer periphery of the shaft portion 32a fixed to the carrier plate 31. The hollow ring portion 32b has an outer peripheral wall 36 shown in FIG.
As shown in (a), the outer diameter is formed to taper from the U-shaped root portion toward the opening side. As shown in FIG. 4, in the planetary roller 32, the hollow ring portion 32b is connected to the sun roller 29 from the U-shaped root portion side as shown in FIG. It is press-fitted between the outer rollers 30.

The first and second electromagnetic brakes 26 and 27 are formed in a substantially annular shape as a whole, and the first electromagnetic brake 26 is arranged radially inside the second electromagnetic brake 27. The electromagnetic brakes 26 and 27 have substantially the same configuration, but the first electromagnetic brake 26 is a first braking flange 34 (first electromagnetic brake) integrally attached to the outer peripheral edge of the intermediate rotor 23. The second electromagnetic brake 27 faces the front end face of the braking force acting portion) of the brake, and the second electromagnetic brake 27
The second braking flange 35 (the braking force acting portion of the second electromagnetic brake) extending to the front end portion of 0 faces the front end surface.

Both electromagnetic brakes 26, 27 are VTC.
By being fixedly installed on the inner surface of the cover 12 and applying a magnetic attraction force to the opposing braking flanges 34, 35,
A braking force is applied to each braking flange 34, 35. Both electromagnetic brakes 26 and 27 are VTC with their rotations locked.
The cover 12 may be attached in a floating state (movable in the axial direction), and the braking force may be applied to the braking flanges 34, 35 by directly making frictional contact with the opposing braking flanges 34, 35.

The operation of this embodiment will be described below.

When the engine is started and idle, the first
While the energization of the electromagnetic brake 26 is turned off, the energization of the second electromagnetic brake 27 is turned on, and the braking force is applied only to the second braking flange 35 side. As a result, the braking force acts on the outer roller 30 of the planetary roller mechanism 28. As a result, the intermediate rotor 23 is rotated to the speed increasing side with the rotation of the drive plate 3, and the tip side of each link 14 is shown in FIG. Thus, it is maintained at the radially outer end. Therefore, the lever shaft 10 (camshaft 1) pivotally connected to each link 14 via the lever 9 is connected to the drive plate 3
The installation angle on the most retarded side is maintained. As a result,
The rotation phases of the crankshaft and the camshaft 1 are controlled to the most retarded side, so that the engine rotation is stabilized and the fuel economy is improved.

When the engine shifts from this state to normal operation, the first electromagnetic brake 26 is turned on, while
The second electromagnetic brake 27 is turned off, and the braking force is applied only to the first braking flange 34 side. As a result, while the outer roller 30 is in the free rotation state, the braking force acts on the intermediate rotating body 23, and the intermediate rotating body 23 rotates relative to the drive plate 3 toward the deceleration side. As a result, the ball 19 at the tip of each link 14 is displaced radially inward along the spiral groove 24, as shown in FIGS. The attachment angle is changed to the most advanced side. Therefore, the output of the engine can be increased.

In the case of this valve timing control device, between the first and second electromagnetic brakes 26, 27 for applying the braking force and the assembling angle operation mechanism 5, the rotary elements mutually transmit power by frictional contact with each other. Since the mechanism 28 is interposed, there is no rattling unlike the case where power is transmitted by meshing gears. Therefore, even when an alternating torque is input to the assembly angle operation mechanism 5 from the camshaft 1 side during operation of the engine, noise and vibration are generated in the assembly angle operation mechanism 5 and the planetary roller mechanism 28. Does not occur.

Particularly, in the device of this embodiment, a carrier plate 31 which is one coaxial rotating element of the planetary roller mechanism 28 is fixed to the lever shaft 10, while
Since the sun roller 29 that comes into frictional contact with the planetary roller 32 is integrated with the intermediate rotating body 23, the intermediate rotating body 2
The rattling of 3 is the lever shaft 1 via the planetary roller mechanism 28.
With 0, it can be surely suppressed. Since the planetary roller 32 is in frictional contact with the outer peripheral surface of the sun roller 29 and the inner peripheral surface of the outer roller 30 with a certain axial width, fluctuations in the inclination direction of the sun roller 29 and the outer roller 30 are suppressed, and the intermediate rotation is performed. The inclination of the body 23 can be suppressed.

Therefore, even if a large moment that tilts the intermediate rotor 23 is input to the engaging portion between the ball 19 at the tip of the link 14 and the spiral groove 24 of the intermediate rotor 23 at the time of input of the alternating torque, even if a large moment is input, The problem that the rotating body 23 is tilted does not occur, and a stable valve timing control operation can always be obtained.

Further, the planetary roller 32 of the planetary roller mechanism 28 is provided with a hollow ring portion 32b having a substantially U-shaped cross section, one end of which is open in the axial direction, and the outer peripheral wall 36 of the hollow ring portion 32b has a U-shaped opening. The sun roller 29 and the outer roller 30 are formed so as to open in a taper shape toward the outside.
In between, the hollow ring portion 32b can be easily press-fitted from the root portion side while elastically deforming. That is, when the planetary roller 32 has a solid structure, the planetary roller 32 must be assembled between the sun roller 29 and the outer roller 30 by using a complicated means such as shrink fitting, but the planetary roller 32 of this embodiment is required. In, the assembling can be performed without using such complicated means.

Since the planetary roller 32 thus press-fitted and assembled is kept pressed against the sun roller 29 and the outer roller 30 due to the elasticity of the hollow ring portion 32b, no gap is formed at the contact portion between the rollers. . Therefore, in the device of this embodiment, it is possible to surely eliminate the rattling between the rollers that make frictional contact, and also to prevent the occurrence of slip between the contact portions. From this, it is possible to further improve the quietness of the device and realize stable operation.

The embodiment of the present invention is not limited to the one described above. For example, the planetary roller which constitutes the planetary roller mechanism 28 is as shown in FIGS. 8 (a) and 8 (b). In the figure, the planetary roller is indicated by reference numeral 132.), and an annular notch 37 may be formed on the outer periphery of the root portion of the outer peripheral wall 36 of the hollow ring portion 132b.
In this case, the root portion of the outer peripheral wall 36 that is first inserted between the sun roller 29 and the outer roller 30 has the cutout portion 37.
Since the diameter is reduced and the rigidity is reduced, the root portion of the outer peripheral wall 36 having a small diameter can be easily inserted between the sun roller 29 and the outer roller 30 during the assembling work of the planetary roller 132. Press fit the outer peripheral wall 3
This can be easily performed by elastic deformation centering on the thin root portion of 6. Therefore, in this embodiment, the workability of assembling the planetary roller 132 can be further improved.

[0036]

As described above, the present invention is provided with the planetary roller mechanism for transmitting the power between the rotating elements by frictional contact,
Since power is transmitted to the assembly angle operation mechanism via the planetary roller mechanism, even if an alternating torque is input, rattling does not occur at the power transmission section, and abnormal noise or vibration is generated. Can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1 showing the same embodiment.

FIG. 3 is an exploded perspective view showing the same embodiment.

FIG. 4 is a sectional view taken along line BB in FIG. 1 showing the same embodiment.

FIG. 5 is a cross-sectional view showing the planetary roller in the same embodiment before and after assembling.

FIG. 6 is a sectional view similar to FIG. 2, showing an operating state of the same embodiment.

FIG. 7 is a sectional view similar to FIG. 2, showing an operating state of the same embodiment.

FIG. 8 is a cross-sectional view showing a planetary roller according to another embodiment of the present invention before and after assembling.

[Explanation of symbols]

1 ... Camshaft 3 ... Drive plate (drive rotor) 4 ... Operation force imparting means 5 ... Assembly angle operation mechanism 8 ... radial groove (radial guide) 10 ... Lever shaft (driven rotor) 14 ... Link 17 ... Projection (movable guide) 19 ... Sphere (movable guide) 23 ... Intermediate rotating body 24 ... spiral groove (spiral guide) 26 ... First electromagnetic brake 27 ... Second electromagnetic brake 28 ... Planetary roller mechanism 29 ... Sun roller (coaxial rotation element) 30 ... Outer roller (coaxial rotation element) 31 ... Carrier plate (carrier, coaxial rotating element) 32, 132 ... Planetary roller 32a ... Shaft 32b, 132b ... Hollow ring part 34 ... First braking flange (braking force acting portion) 35 ... Second braking flange (braking force acting part) 36 ... Outer wall 37 ... Notch

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3G018 AA05 AB02 AB16 BA09 BA10                       BA29 BA31 BA32 BA33 CA11                       CA16 DA05 DA20 DA70 DA71                       DA72 DA83 DA85 DA86 EA02                       EA22 FA01 FA07 GA01 GA32                 3J030 EA12 EC02                 3J051 AA01 BA03 BB08 BD02 BE03                       ED07 ED14 FA01

Claims (5)

[Claims] 1. A driven rotating body which is rotationally driven by a crankshaft of an internal combustion engine, and a driven rotating body which comprises a camshaft or a separate member coupled to the same shaft, and which transmits power from the driving rotating body. In a valve timing control device for an internal combustion engine, comprising: an assembly angle operating mechanism that operates an assembly angle of the drive rotating body and the driven rotating body, an operating force is transmitted to the assembly angle operating mechanism via a planetary roller mechanism. A valve timing control device for an internal combustion engine, which is operated. 2. A driven rotary body that is driven to rotate by a crankshaft of an internal combustion engine, and a driven rotary body that is composed of a camshaft or a separate member connected to the shaft, and that transmits power from the drive rotary body. A radial guide provided on either one of the drive rotating body and the driven rotating body, and a surface provided on the side facing the radial guide, which is provided so as to be rotatable relative to the drive rotating body and the driven rotating body. An intermediate rotating body having a spiral guide, a movable guide portion displaceably guided and engaged with the radial guide and the spiral guide, and separated from the center of rotation of the other one of the drive rotating body and the driven rotating body. And a link that swingably connects the movable guide portion to the movable guide portion. The intermediate rotor is engaged with the spiral guide by rotating the intermediate rotor with respect to the drive rotor and the driven rotor. In the valve timing control device of the internal combustion engine, which displaces each movable guide portion in the radial direction along the radial guide, and converts the displacement into the relative rotation of the driving rotary body and the driven rotary body via the link, A planetary roller mechanism, a first electromagnetic brake that operates the intermediate rotating body in a decelerating direction by applying a braking force to one coaxial rotating element of the planetary roller mechanism, and another coaxial rotating element of the planetary roller mechanism. A second electromagnetic brake for operating the intermediate rotating body in a speed increasing direction by applying a braking force to the intermediate rotating body, and integrating the intermediate rotating body with one coaxial rotating element of the planetary roller mechanism. Valve timing control device for internal combustion engine. 3. A carrier for supporting a planetary roller of a planetary roller mechanism is fixed to a driven rotating body or a driving rotating body, and the sun roller and outer roller of the planetary roller mechanism that frictionally contact the outer peripheral surface of the planetary roller are connected to the first electromagnetic field. The internal combustion engine according to claim 2, wherein one of the braking force acting portion of the brake and the braking force acting portion of the second electromagnetic brake is provided, and the intermediate rotating body is integrated with one of the sun roller and the outer roller. Engine valve timing control device. 4. A planetary roller shaft portion is provided with a hollow ring portion having an approximately U-shaped cross-section whose one end in the axial direction is opened on the outer periphery of the shaft portion, and the outer peripheral wall of the hollow ring portion is provided from the U-shaped root portion to the opening side. The valve timing control device for an internal combustion engine according to any one of claims 1 to 3, wherein the valve timing control device is formed so that the outer diameter thereof widens. 5. The valve timing control device for an internal combustion engine according to claim 4, wherein an annular notch is provided on the outer periphery of the root portion of the outer peripheral wall of the hollow ring portion.