JPH11351331A - Internal combustion engine vibration reduction device - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To reduce the size of an engine equipped with a device for reducing roll vibration and improve the on-board performance of the engine. An internal gear (26) is rotated by the operation of a planetary gear mechanism to generate an inertial force. An internal gear (26) is provided on a crankshaft so as to rotate integrally with the crankshaft (22). The internal combustion engine is fixed so that the carrier 31 is fixed so as to prevent the planetary gear 28 from revolving, and the inertial mass body 36 is integrally rotated with the sun gear 35 in a direction opposite to the rotation direction of the crankshaft. The planetary gear 28 is fixed to one end 31 of a rotating shaft 33 rotatably supported by a bearing 32 provided on a carrier 31 so as to rotate integrally therewith, and the other end of the rotating shaft 33 is provided. A drive pulley 34 around which a drive belt for driving the accessory is wound is fixed so as to rotate integrally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration reducing device for reducing the vibration of an internal combustion engine itself caused by the rotation of the internal combustion engine, and more particularly, to a vibration reducing device using an inertial mass rotating in the opposite direction to a crankshaft. The present invention relates to a vibration reduction device for an internal combustion engine that reduces roll vibration of a vehicle.

[0002]

2. Description of the Related Art In recent years, interest in improving fuel efficiency of automobiles in response to environmental problems has increased, and as an internal combustion engine (engine) mounted on automobiles, a direct injection gasoline engine or a direct injection gasoline engine that directly injects fuel into a cylinder. Diesel engines are in the limelight, but these engines have higher combustion excitation force than conventional engines, so the roll vibration accompanying torque fluctuations is also large. There is a problem that the muffled sound and the floor vibration of the vehicle body deteriorate.

[0003] One method for solving such a problem is as follows.
For example, JP-A-6-42591, JP-A-6-50
As disclosed in Japanese Patent No. 388, a flywheel directly attached to a crankshaft and a separate auxiliary flywheel rotating in the reverse direction are added, so that a moment acting in the opposite direction to the moment acting on the engine body as a reaction of generating torque is generated. There is a vibration reduction device that generates and reduces the roll vibration of the engine body.

In addition, the above-described vibration reducing apparatus causes problems such as an increase in the mass of the engine and a space for arranging the sub flywheel. For example, Japanese Patent Laid-Open No. 7-35199 discloses a method for solving these problems. As shown in the official gazette, etc., vibration reduction that reduces the roll vibration of the engine by effectively utilizing the existing inertial mass body, which is an auxiliary component of the engine, without adding a new heavy object such as an auxiliary flywheel There is a device.

As shown in FIGS. 6 (a) and 6 (b), the vibration reduction device disclosed in Japanese Patent Application Laid-Open No. 7-35199 has an internal space between a crankshaft 2 and a crank pulley 3 of an engine 1. A planetary gear mechanism including a gear 4, a planetary gear 5, a sun gear 6, etc. is interposed, and the crankshaft 2 and the internal gear 4 of the planetary gear mechanism are connected so as to rotate integrally, and the crank pulley 3 and the planetary gear mechanism The sun gear 6 and the sun gear 6 are connected so as to rotate integrally,
The rotation of the planetary gear 5 of the planetary gear mechanism is prohibited, and the crank pulley 3 is configured to rotate in the opposite direction (reverse rotation) to the rotation direction of the crankshaft 2. And the second crank pulley 7 is configured to rotate in the same direction as the rotation direction of the crankshaft 2 (forward rotation). Thereby, the rotor portion of the alternator 9 is reversely rotated in the direction opposite to the rotation direction of the crankshaft 2 via the driving belt 8 to generate an inertial force,
Further, the power steering pump 11 and the water pump 12 are rotated in the same direction as the rotation direction of the crankshaft 2 through the driving belt 10 by the second crank pulley 7 rotating in the forward direction to change the design of these auxiliary machines. It is intended to be kept to a minimum.

[0006]

However, in an engine provided with the vibration reducing device disclosed in Japanese Patent Laid-Open No. 7-35199, the engine 1 is connected to a transmission 14 as shown in FIG. When it is installed in the engine room E of the FF laterally placed vehicle body 15, it is difficult to secure a sufficient gap between the left and right cross members 15a set at a predetermined interval.

That is, the power steering pump 11 and the water pump 12 which are required to be driven at a low speed increase ratio by forward rotation.
And the like are generally located at the rear of the vehicle body in the FF laterally mounted vehicle body 15, and the side members 15a defining the engine room E are set so as to become thicker toward the rear of the vehicle body. In the above-described conventional configuration in which a gap between the engine 1 and the side member 15a is not ensured toward the rear and the forwardly rotating second crank pulley 7 is located outside the reversely rotating crank pulley 3, the power steering pump 11 and the water The driving belt 10 for driving the auxiliary equipment such as the pump 12 or the pulleys 11a and 12a of these auxiliary equipment are disposed in the region A in the side member 15
a, etc., and it becomes difficult to mount the engine 1 on the vehicle.

[0008] The present invention has been made in view of such problems of the prior art.
Assuming that roll vibrations are reduced, we will minimize the design changes of existing accessories and use them as much as possible, and aim to reduce the size and size of the engine (internal combustion engine) as a whole and further improve its on-board performance. An object of the present invention is to provide a vibration reduction device for an internal combustion engine that can be used.

[0009]

According to a first aspect of the present invention, there is provided a vibration reducing apparatus for an internal combustion engine, comprising: a sun gear; a planetary gear held by a carrier so as to mesh with the sun gear; and an internal gear meshing with the planetary gear. A planetary gear mechanism including: and an inertial mass body that is rotated by the operation of the planetary gear mechanism to generate an inertial force, wherein the internal gear rotates integrally on the same axis as a crankshaft. Fixed to the crankshaft,
The carrier is fixed so as to prohibit the planetary gear from revolving, and the inertial mass body is formed so as to rotate integrally with the sun gear in a direction opposite to a rotation direction of the crankshaft. A vibration reduction device for an internal combustion engine, which is configured to reduce roll vibration of the internal combustion engine accompanying the planetary gear,
A driving pulley for winding a driving belt for driving an auxiliary machine is fixed to the rotating shaft which is rotatably supported by a bearing provided on the carrier so as to rotate integrally with the rotating shaft. Fixed to rotate together,
It has a configuration.

According to a second aspect of the present invention, in the vibration reducing apparatus for an internal combustion engine according to the first aspect, the carrier has a cover shape covering the internal gear, the planetary gear, and the sun gear. None, the rotating shaft is supported by the bearing by extending one end side inside the carrier and protruding the other end outside the carrier, the planetary gear is fixed to one end side of the rotating shaft, The drive pulley is fixed to the other end of the rotating shaft.

According to a third aspect of the present invention, there is provided a vibration reducing device for an internal combustion engine, wherein the planetary gear mechanism includes a sun gear, a planetary gear held by a carrier so as to mesh with the sun gear, and an internal gear meshing with the planetary gear. An inertial mass that is rotated by the operation of the planetary gear mechanism to generate an inertial force, wherein the internal gear is fixed to the crankshaft so as to rotate integrally and coaxially with the crankshaft, The carrier is fixed so as to prohibit the planetary gear from revolving, and the inertial mass body is formed so as to rotate integrally with the sun gear in a direction opposite to a rotation direction of the crankshaft. A vibration reduction device for an internal combustion engine adapted to reduce roll vibration of the internal combustion engine accompanying the The planetary gear is rotatably supported by a support shaft provided on the carrier, a second planetary gear meshing with the sun gear is rotatably supported on the support shaft, and the second planetary gear has An internal gear / drive pulley having internal teeth on the inner peripheral surface and having a winding portion for winding a driving belt for driving the auxiliary machine on the outer peripheral surface is arranged in a meshed state. I have.

According to a fourth aspect of the present invention, there is provided the vibration reducing apparatus for an internal combustion engine according to the third aspect, wherein the carrier and the inertial mass body include the internal gear, the planetary gear, the sun gear, The second planetary gear is formed so as to cover the internal teeth of the internal gear and drive pulley.

According to a fifth aspect of the present invention, there is provided a vibration reducing apparatus for an internal combustion engine according to any one of the first to fourth aspects, wherein the inertial mass and the sun gear rotate relative to the crankshaft. The crankshaft is movably supported and the movement of the crankshaft in the axial direction is restricted by a thrust bearing.

According to a sixth aspect of the present invention, in the vibration reducing apparatus for an internal combustion engine according to any one of the first to fifth aspects, the inertial mass and the sun gear are integrally formed. , Configuration.

According to a seventh aspect of the present invention, there is provided the vibration reducing apparatus for an internal combustion engine according to any one of the first to sixth aspects, wherein the inertial mass body includes a driving belt for driving an auxiliary machine. , A crank pulley around which is wound.

[0016]

According to the vibration reducing device for an internal combustion engine according to the first aspect of the present invention, when the crankshaft rotates, the internal gear of the planetary gear mechanism rotates integrally with the crankshaft. Through the planetary gear which meshes with the gear and the sun gear and whose revolution is prohibited, the sun gear is accelerated in the direction opposite to the rotation direction of the crankshaft and rotates in the reverse direction. Then, the inertial mass body rotates at the increased speed and reversely rotates together with the sun gear that rotates at the increased speed and acts as a cancel torque for canceling the torque reaction force that is the root of the roll vibration. Therefore, the roll vibration of the engine can be reduced by the inertial mass body that rotates at the increased speed.

Further, when the internal gear rotates together with the crankshaft, the planetary gear meshed with the internal gear rotates, and the drive pulley coupled to the planetary gear via a rotation shaft rotates in the same direction as the planetary gear, that is, the rotational direction of the crankshaft. Will rotate in the same direction (forward rotation). Auxiliary devices such as a power steering pump and a water pump are driven to rotate forward via a driving belt wound around the driving pulley. Therefore, the auxiliary machine can be rotationally driven by the drive pulley directly attached to the rotating shaft that rotates integrally with the planetary gear, instead of the drive pulley (crank pulley) directly attached to the crankshaft as in the related art. By positioning the drive pulley fixed to the rotating shaft near the center (inside) of the engine in the axial direction of the crankshaft, accessories driven by the drive pulley can also be positioned near the center of the engine. This allows
A sufficient clearance can be secured between the auxiliary machine, the driving belt and the like and the vehicle body side member and the like, so that the vehicle mountability can be improved.

According to the vibration reducing device for an internal combustion engine according to the second aspect of the present invention, the internal gear, the planetary gear, and the sun gear are covered by the carrier that supports the planetary gear. The lubricating oil can be supplied to the lubricating oil to perform a lubricating action, and the driving pulley, the driving belt and the like can be operated in a dry atmosphere outside the carrier.

Therefore, it is possible to divide the area requiring the lubricating action and the area not requiring the lubricating action into two, and to secure the functional reliability of the mechanism arranged in each area.

According to the third aspect of the present invention, when the crankshaft rotates, the internal gear of the planetary gear mechanism rotates integrally with the crankshaft. Via a planetary gear that meshes with the sun gear and is prohibited from revolving,
The sun gear is accelerated in the direction opposite to the direction of rotation of the crankshaft, and reversely rotates. Then, the inertial mass body rotates at an increased speed and reverse rotation together with the sun gear that rotates at an increased speed,
This acts as a cancel torque for canceling the torque reaction force that is the root of the roll vibration. Therefore, the roll vibration of the engine can be reduced by the inertial mass body that rotates at the increased speed.

When the internal gear rotates together with the crankshaft, the planetary gear meshing with the internal gear rotates in the same direction as the crankshaft, and the sun gear meshing with the planetary gear rotates in the direction opposite to the crankshaft. The second planetary gear meshed with the sun gear rotating in the opposite direction rotates in the same direction as the crankshaft, and the second planetary gear rotates in the same direction as the crankshaft.
The internal gear and drive pulley meshing with the planetary gears rotate in the same direction as the crankshaft (forward rotation)
Will do. Then, auxiliary machines such as a power steering pump and a water pump are driven to rotate forwardly via a driving belt wound around the internal gear and driving pulley. Therefore, instead of the drive pulley (crank pulley) directly attached to the crankshaft as in the related art, the second gear that is rotated via the planetary gear and the sun gear is used.
The auxiliary gear can be rotationally driven by the planetary gear and the internal gear / drive pulley meshed with the second planetary gear. Therefore, the second planetary gear and the internal gear / drive pulley are shifted toward the center (inside) of the engine. By positioning the auxiliary gears and the like driven by the internal gear and driving pulley, the auxiliary machines and the like can be arranged closer to the center of the engine. Thereby, the above-mentioned auxiliary machine,
The clearance between the driving belt and the like and the vehicle body side member and the like can be sufficiently ensured, and the on-board property can be improved.

Further, when a plurality of pairs of the second planetary gear and the planetary gear for transmitting the rotational force to the internal gear / drive pulley for driving the accessory are applied, the rotational force is transmitted using all of the pairs. As a result, the load applied to the pair of second planetary gears and the planetary gears can be reduced, and the mechanical durability, reliability, and the like can be improved.

According to the vibration reducing device for an internal combustion engine according to claim 4 of the present invention, the internal gear, the planetary gear, the sun gear, the second planetary gear, and the internal gear are constituted by the carrier supporting the planetary gear and the inertial mass. Since the internal teeth of the drive pulley are covered, lubricating oil can be supplied to these gear meshing regions to perform a lubricating action, and the internal gear can be used in a dry atmosphere where lubricating oil is not supplied. A drive belt can be wound around the drive pulley to operate.

Therefore, the area requiring lubrication and the area not requiring lubrication can be divided into two parts to ensure the functional reliability of the mechanisms arranged in each area.

According to the vibration reducing device for an internal combustion engine according to the fifth aspect of the present invention, the inertial mass and the sun gear are rotated while being positioned at predetermined positions in the axial direction of the crankshaft. The above reliability can be secured.

According to the vibration reducing device for an internal combustion engine according to claim 6 of the present invention, since the sun gear and the inertial mass are integrally formed, the sun gear and the inertial mass are integrated. Since it is possible to adjust the rotational balance, etc. in this state, it is necessary to control the alignment at the time of assembly with high precision compared to the case where the separately formed sun gear and inertial mass body are later joined by bolts etc. Not
Therefore, the assembling can be facilitated and the rotation balance can be made more accurate.

According to the vibration reducing apparatus for an internal combustion engine according to claim 7 of the present invention, since the inertial mass rotating integrally with the sun gear is the crank pulley, the driving belt wound around the crank pulley. The rotary part of the auxiliary machine that is rotationally driven via the motor can also be applied as an inertial mass body that generates a cancel torque, and the roll vibration can be significantly reduced.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of an engine provided with a vibration reduction device according to the present invention. In this engine 20, as shown in FIG. Of the crankshaft 22 provided movably, the end face 21 of the cylinder block 21
A chain sprocket 23 for driving a valve train and a chain sprocket 24 for driving an oil pump (not shown) are externally fitted to the reduced diameter portion 22a protruding from a, and are positioned in the rotational direction by a key 25. hand,
An internal gear 26 that forms a part of the planetary gear mechanism is externally fitted, and is positioned in the rotational direction by a key 27.

A planetary gear 28 meshing with the internal gear 26 includes a front cover 29 and an oil pan 30 connected to the cylinder block 21 by bolts or the like.
The carrier 31 is rotatably supported by a carrier 31 fixed thereto. That is, in the circumferential direction of the internal gear 26, for example, four radial bearings 32 fixed to the carrier 31 at equal intervals (center angle 90 degrees) are rotatably supported by the rotating shafts 33, respectively. The planetary gear 28 is externally fitted and fixed to one end 33a of the shaft 33. Here, the carrier 31 is attached to the front cover 29.
And oil pan 30 (ie, cylinder block 21)
, The planetary gear 28
Is in a state where its revolution is prohibited.

On the other hand, a drive pulley 34 for driving an auxiliary machine is externally fixed to the other end 33b of the rotary shaft 33. When the internal gear 26 rotates together with the crankshaft 22, the planetary gear 28 Is transmitted to the drive pulleys 34 via the rotation shaft 33, and these drive pulleys 34 rotate in the same direction as the rotation direction of the crankshaft 22 (forward rotation).

The sun gear 35 meshing with the planetary gear 28 is provided with a crank pulley 3 as an inertial mass body.
6 and a sun gear / crank pulley 37 formed integrally with
And is rotatably supported by the reduced diameter portion 22a of the crankshaft 22. That is, the sun gear / crank pulley 37 has a two-stage configuration in which the small-diameter cylindrical portion 37a and the large-diameter cylindrical portion 37a are connected by the disk portion 37c.
A sun gear 35 is formed on the outer peripheral surface of the small diameter cylindrical portion 37a,
A winding portion 36a is formed on the outer peripheral surface of the large-diameter cylindrical portion 37b, and the winding portion 36a and the disk portion 37c form a crank pulley 36. The sun gear and crank pulley 37 is fitted to the reduced diameter portion 22a by a needle bearing 40 provided on the outer peripheral surface of the collar 39 which is fitted on the reduced diameter portion 22a and positioned in the rotational direction by the keys 27 and 38. It is rotatably supported with respect to it.

As described above, in the sun gear and crank pulley 37 rotatably supported by the reduced diameter portion 22a, the oil seal 41 is attached between the outer peripheral surface of the small diameter cylindrical portion 37a and the carrier 31. , Small diameter cylindrical part 37
One end of the thrust bearing 42 held by the collar 39
, And the other end of the small-diameter cylindrical portion 37a is brought into contact with a thrust bearing 44 held by a stopper member 43 to position the crankshaft 22 in the axial direction.

Here, the stopper member 43 is externally fitted to the distal end side of the reduced diameter portion 22a and the bolt 45 and the washer 46 are fixed to the reduced diameter portion 22a in a state where the stopper member 43 is positioned in the rotational direction by the key 38. It is fastened and fixed. Further, the flange portion 43 of the stopper member 43
An oil seal 47 is disposed between the a and the disk portion 37c of the sun gear / crank pulley 37.

The carrier 31 includes an oil seal 41,
The internal gear 26, the planetary gear 28, and the sun gear 35 so that the lubricating oil supplied to the meshing area of the planetary gear mechanism and the like in cooperation with the oil seal 47 does not leak outside.
And the like.

Next, the operation of the planetary gear mechanism and the sun gear / crank pulley 37 will be described with reference to FIG. As shown in FIG. 3A, assuming that the engine body generates a torque T (T is a function of time) due to the explosive force at the time of combustion, the internal gear 26 directly connected to the crankshaft 22 has: The above torque T, planetary gear 2
8 and a reaction force N resulting from the support of the force N by its rotating shaft.

Assuming that the moment of inertia of the planetary gear 28 is sufficiently small,
, A driving force N from the internal gear 26, a reaction force N from the sun gear 35, and a reaction force 2N resulting from supporting the driving force N and the reaction force N on the rotating shaft.

Further, the driving force N from the planetary gear 28 and the reaction force N generated as a result of supporting the driving force by the rotating shaft portion act on the sun gear 35.

On the other hand, as shown in FIG. 2 (b), a reaction torque -T generated as a reaction of the torque T generated by the explosion force and a reaction generated by the reaction force generated in the rotating shaft of each gear are applied to the engine body. And the force generated as an action. This force has a magnitude of 2N and a moment arm length of R _s + R _p
(Wherein, R _s is the radius of the pitch circle of the sun gear 35, R _p denotes a pitch circle radius of the planetary gear 28), and acts as a couple of opposite counter torque -T of the engine body. This couple acts as a cancel torque that cancels the counter torque -T, and as a result, the roll vibration of the engine body is reduced.

Here, the moment of inertia around the roll axis of the engine body is Ι, the roll displacement angle of the engine body is φ, and the rotation system of the engine body (flywheel or drive plate, crankshaft 22, connecting rod rotation equivalent part, The moment of inertia of the internal gear 26) is Ι ₁ , the moment of inertia of the sun gear / crank pulley 37 as an inertial mass body and the accessory rotated by the sun gear / crank pulley 37 is I ₂ , and the sun gear 35 with respect to the internal gear 26 is Assuming that the speed increase ratio is ρ, the equation of motion relating to roll vibration of the engine body is expressed by the following equation (1).

[0041] As understood from the above equation (1), as the coefficient (Ι ₁ −ρ · Ι ₂ ) / (Ι ₁ + ρ ² · _{２ 2} ) applied to T on the right side approaches 0, the reduction in roll vibration increases. Become. That is, the pitch of the internal gear 26 and the sun gear 35 with respect to the moment of inertia の₁ of the rotating system of the engine body so as to satisfy the following expression (2), 、 ₁ = ρ · Ι ₂ (2) Circular radii R _i , R _s , sun gear and crank pulley 37, and overall moment of inertia including auxiliary equipment Ι
_{If 2} is set, the reduction in roll vibration will be greatest.

In this embodiment, when the internal gear 26 rotates together with the crankshaft 22, the driving pulley 34 rotates integrally with the planetary gear 28 in the same direction as the crankshaft 32, as shown in FIG. As described above, the power steering pump 11 and the water pump 12 rotate in the same direction as the crankshaft 22 (forward rotation) via the driving belt 10 wound around the driving pulley 34, and further, the sun gear meshing with the planetary gear 28. In addition, the crank pulley 37 is rotated in the opposite direction to the crankshaft 22 at an increased speed, and the alternator 9 is rotated in the opposite direction to the crankshaft via the drive belt 8 wound around the winding portion 36a. I do.

Here, as shown in FIG. 3B, since the drive pulley 34 is disposed closer to the center of the engine than the sun gear and crank pulley 37, the power pulley driven by the drive belt 10 is provided. The pump 11 and the water pump 12 are also disposed closer to the center of the engine, and a sufficient clearance is provided between the pulley 11a of the power steering pump 11, the pulley 12a of the water pump 12, the driving belt 10, and the vehicle body side member 15a. This makes it possible to improve the on-board performance of the engine.

FIG. 4 shows a second embodiment of the engine provided with the vibration reduction device according to the present invention. In the crankshaft 22 rotatably provided on the cylinder block 21 of the engine body, the cylinder is one of the cylinders. A chain sprocket 23 for driving a valve train and a chain sprocket 24 for driving an oil pump (not shown) are externally fitted to a reduced diameter portion 22a protruding from an end face 21a of the block 21.
, The internal gear 26 which forms part of the planetary gear mechanism is externally fitted, and the key 27 is used for positioning in the rotational direction. The same is true.

In the engine 50 of the present embodiment, FIG.
As shown in the figure, a support shaft 51a fixed to a carrier 51 fixed to a front cover 29 and an oil pan 30 connected to the cylinder block 21 by bolts or the like.
A planetary gear 52 that meshes with the internal gear 26 is rotatably supported on one end 51a ′ of the gear.
That is, a total of four planetary gears 52 are provided at one end 51a 'of four support shafts 51a fixedly provided to the carrier 51 at equal intervals (central angle of 90 degrees) in the circumferential direction of the internal gear 26, respectively. It is rotatably supported via a needle bearing (not shown) and the like, and is prevented from falling off by a stopper piece 51b. Here, since the carrier 51 is fixed to the front cover 29 and the oil pan 30 (that is, the cylinder block 21), the planetary gear 52 is in a state where its revolution is prohibited.

On the other hand, the other end 5 of the four support shafts 51a
A total of four second planetary gears 53 are rotatably supported by 1a ″ via needle bearings (not shown) and the like and are prevented from falling off by stopper pieces 51b.

The sun gear 54 meshing with the planetary gear 52 is provided with a crank pulley 5 as an inertial mass body.
5 and a sun gear / crank pulley 56 formed integrally with
The sun gear 54 is disposed so as to be rotatable with respect to the reduced diameter portion 22 a of the crankshaft 22, and is further arranged to mesh with the second planetary gear 53. That is, the sun gear and crank pulley 5
6 has a two-stage configuration in which a small-diameter cylindrical portion 56a and a large-diameter cylindrical portion 56b are joined by a disk portion 56c.
A sun gear 54 meshing with the planetary gear 52 and the second planetary gear 53 is formed on the outer peripheral surface of the large diameter cylindrical portion 56b, and a winding portion 55a is formed on the outer peripheral surface of the large-diameter cylindrical portion 56b. Thus, a crank pulley 55 is formed.

The sun gear and crank pulley 5
Reference numeral 6 denotes a needle bearing 4 provided on the outer peripheral surface of a collar 39 which is externally fitted to the reduced diameter portion 22a and positioned in the rotational direction by the keys 27 and 38, as in the first embodiment.
0, it is supported rotatably with respect to the reduced diameter portion 22a. As described above, in the sun gear and crank pulley 56 rotatably supported by the reduced diameter portion 22a, one end of the small diameter cylindrical portion 56a is brought into contact with the thrust bearing 42 held by the collar 39. Small cylindrical part 5
The other end of 6 a is brought into contact with a thrust bearing 44 held by a stopper member 43 to position the crankshaft 22 in the axial direction.

Further, similarly to the first embodiment, the stopper member 43 is fitted on the distal end side of the reduced diameter portion 22a and is positioned on the reduced diameter portion 22a in a state of being positioned in the rotational direction by the key 38. Bolt 45 and washer 46
An oil seal 47 is disposed between the flange portion 43a of the stopper member 43 and the disk portion 56c of the sun gear / crank pulley 56.

In the radially outer region of the second planetary gear 53, an internal gear / drive pulley 5 having internal teeth 57a on the inner peripheral surface and a winding portion 57b on the outer peripheral surface is provided.
7 are arranged, and its internal teeth 57a mesh with the four second planetary gears 53.

An oil seal 58 is arranged between one side surface of the internal gear / drive pulley 57 and the disk portion 56c of the sun gear / crank pulley 56, and between the other side surface and the end surface of the carrier 51, respectively. Have been.

The carrier 51 and the disk portion 51c of the sun gear / crank pulley 56
7, 58, etc., the internal gear 26, the planetary gear 52, the sun gear 54, the second planetary gear 53, and the internal teeth so that the lubricating oil supplied to the meshing area of the planetary gear mechanism does not leak outside. 57a and the like.

The action of reducing the roll vibration of the planetary gear mechanism and the sun gear / crank pulley 56 having the above configuration is the same as that of the first embodiment. In the above configuration, when the internal gear 26 rotates together with the crankshaft 22, the planetary gear 52 rotates in the same direction as the crankshaft 22, and the planetary gear 52
A sun gear / crank pulley 56 having a sun gear 54 that meshes with the crankshaft rotates in the opposite direction to the crankshaft. Therefore, as shown in FIG. 5, the alternator 9 is increased in the direction opposite to the crankshaft 22 through the driving belt 8 wound around the winding portion 55a of the sun gear / crank pulley 56 which rotates at the increased speed and reversely rotates. Reversing quickly.

Further, the second planetary gear 53 meshing with the sun gear 54 rotates in the same direction as the crankshaft 22, and the internal gear / drive pulley 57 fitted to the second planetary gear 53
2. Rotate (forward rotation) in the same direction as 2. Accordingly, the winding portion 57 of the internal gear / drive pulley 57 that rotates in the forward direction rotates.
b, the power steering pump 11 and the water pump 1 as shown in FIG.
2 rotates forward in the same direction as the crankshaft 22.

Since the internal gear / drive pulley 57 is disposed closer to the engine center side than the sun gear / crank pulley 56, the internal gear / drive pulley 57 is driven by the drive belt 10 as in the first embodiment. The power steering pump 11 and the water pump 12 are also arranged near the center of the engine, and the clearance between the pulley 11a of the power steering pump 11, the pulley 12a of the water pump 12, the driving belt 10 and the vehicle body side member 15a is sufficiently increased. As a result, it is possible to improve the on-board performance of the engine.

Further, since the internal gear / drive pulley 57 is driven by all of the second planetary gears 53, the load applied to one of the second planetary gears 53 is reduced, and the mechanical durability and reliability are improved. There is an advantage that performance is improved.

In the first and second embodiments described above, an example is shown in which the sun gears 35, 54 and the crank pulleys 36, 55 are integrally formed. However, the present invention is not limited to this. It may be formed as a body and connected together by bolts or the like to rotate integrally.

[Brief description of the drawings]

FIG. 1 is a first view of a vibration reduction device for an internal combustion engine according to the present invention.
It is a schematic structure figure showing an example of.

FIGS. 2A and 2B are diagrams for explaining the operation of the vibration reduction device according to the present invention, wherein FIG. 2A is a schematic diagram showing a force relationship acting on each gear of the planetary gear mechanism, and FIG. It is a schematic diagram which shows the force relationship which acts.

FIG. 3A is a front view of the internal combustion engine according to the first embodiment, and FIG. 3B is a plan view showing a state where the internal combustion engine according to the first embodiment is mounted on a vehicle body.

FIG. 4 shows a second example of the vibration reduction device for an internal combustion engine according to the present invention.
It is a schematic structure figure showing an example of.

FIG. 5 is a front view of an internal combustion engine according to a second embodiment.

FIG. 6 shows a conventional vibration reduction device,
(A) is a partial longitudinal sectional view, (b) is a front view of an internal combustion engine provided with a vibration reduction device.

FIG. 7 is a plan view showing a state where an internal combustion engine equipped with a conventional vibration reduction device is mounted on a vehicle body.

[Explanation of symbols]

 Reference Signs List 8 drive belt 9 alternator 10 drive belt 11 power steering pump 12 water pump 15 body 15a side member 21 cylinder block 22 crankshaft 22a reduced diameter portion 23, 24 chain sprocket 25 key 26 internal gear 27 key 28 planetary gear 29 front cover 30 Oil pan 31 Carrier 32 Bearing 33 Rotary shaft 33a One end 33b Other end 34 Drive pulley 35 Sun gear 36 Crank pulley (inertial mass body) 36a Wrapping part 37 Sun gear / crank pulley 37a Small cylindrical part 37b Large cylindrical part 37c Disk part 38 Key 39 Collar 40 Needle bearing 41 Oil seal 42, 44 Thrust bearing 43 Stopper member 43a Flange part 45 Bolt 46 Washer 47 Oil seal Tool 51 Carrier 51a Support shaft 51a ′ One end 51a ″ Other end 51b Stopper piece 52 Planetary gear 53 Second planetary gear 54 Sun gear 55 Crank pulley (inertial mass body) 55a Winding portion 56 Sun gear / crank pulley 56a Small diameter cylindrical portion 56b Large-diameter cylindrical portion 56c Disk portion 57 Internal gear / drive pulley 57a Internal teeth 57b Wrap-around portion 58 Oil seal

Claims (7)

[Claims] A planetary gear mechanism including a sun gear, a planetary gear held by a carrier so as to mesh with the sun gear, and an internal gear meshing with the planetary gear; and an inertial force rotated by the operation of the planetary gear mechanism. Wherein the internal gear is fixed to the crankshaft so as to rotate integrally on the same axis as the crankshaft, and the carrier is fixed to prohibit the planetary gear from revolving. The inertial mass body is formed so as to rotate integrally with the sun gear in a direction opposite to a rotation direction of the crankshaft, so as to reduce roll vibration of the internal combustion engine accompanying rotation of the crankshaft. A vibration reducing device for an internal combustion engine, wherein the planetary gear is a bearing provided on the carrier. The drive shaft is fixed so as to rotate integrally with a rotation shaft supported more rotatably, and a drive pulley around which a drive belt for driving an accessory is wound is integrally rotated with the rotation shaft. A vibration reduction device for an internal combustion engine, which is fixed. 2. The carrier has a cover shape that covers the internal gear, the planetary gear, and the sun gear, and the rotating shaft has one end protruding inside the carrier and the other end protruding outside the carrier. The shaft is extended and supported by the bearing, the planetary gear is fixed to one end of the rotating shaft, and the drive pulley is fixed to the other end of the rotating shaft. 2. The vibration reduction device for an internal combustion engine according to claim 1. 3. A planetary gear mechanism including a sun gear, a planetary gear held by a carrier so as to mesh with the sun gear, and an internal gear meshing with the planetary gear, and an inertia force rotated by the operation of the planetary gear mechanism. Wherein the internal gear is fixed to the crankshaft so as to rotate integrally on the same axis as the crankshaft, and the carrier is fixed to prohibit the planetary gear from revolving. The inertial mass body is formed so as to rotate integrally with the sun gear in a direction opposite to a rotation direction of the crankshaft, so as to reduce roll vibration of the internal combustion engine accompanying rotation of the crankshaft. An apparatus for reducing vibration of an internal combustion engine, wherein the planetary gear includes a support provided on the carrier. A second planetary gear meshing with the sun gear is rotatably supported on the support shaft, and the second planetary gear has internal teeth on an inner peripheral surface and an outer periphery. An internal gear and vibration reduction device for an internal combustion engine, wherein an internal gear and a driving pulley having a winding portion for winding a driving belt for driving an auxiliary machine are meshed with each other. 4. The internal gear, planetary gear, sun gear, second carrier, and inertial mass
The vibration reducing device for an internal combustion engine according to claim 3, wherein the vibration reducing device is formed so as to cover the internal teeth of the planetary gear and the internal gear and the driving pulley. 5. The inertial mass body and the sun gear are rotatably supported on the crankshaft, and movement of the crankshaft in the axial direction is restrained by a thrust bearing. The movement reduction device for an internal combustion engine according to any one of claims 1 to 4, wherein: 6. The vibration reduction device for an internal combustion engine according to claim 1, wherein the inertial mass body and the sun gear are integrally formed. 7. The vibration of the internal combustion engine according to claim 1, wherein the inertial mass body is a crank pulley around which a driving belt for driving an auxiliary machine is wound. Reduction device.