JPH0133875Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a flywheel that absorbs torque fluctuations by the rolling surface of the rollers, and in particular to a flywheel that absorbs torque fluctuations and improves the durability of the rolling surface of the rollers. Regarding wheels.

Prior Art Conventionally, a flywheel has been proposed in which rollers are provided in a chamber provided with a rolling surface and torque fluctuations are absorbed by the rolling of the rollers (for example, Utility Model Application No. 59-24550). This type of conventional flywheel has only one cylindrical roller on one rolling surface 1, as shown in Fig. 8, and when roller 2 is tilted as shown in Fig. 8, , the entire load of the rollers 2 is applied to the contact portion 3, and there is a risk that this portion will be worn and deformed, causing problems in durability.

Purpose of the invention In order to solve the above problems, this invention absorbs torque fluctuations by dispersing the load applied to the roller rolling surface of a roller type variable speed dynamic damper and reducing the load applied to each contact part. The purpose is to improve the durability of the flywheel.

Structure of the invention In order to achieve this objective, the torque fluctuation absorbing flywheel of the invention is provided with a roller in a chamber equipped with a rolling surface, and the roller is divided into a plurality of pieces in the axial direction of the roller. has been done.

Effect of the invention In such a flywheel, when the rollers are tilted in the axial direction with respect to the rolling surface, each divided roller comes into contact with the rolling surface, and each contact part receives the load of each roller. The load is distributed and applied to the rolling surface.

Effects of the invention Therefore, the load on the contact area of each divided roller with the rolling surface is smaller than the load applied on the contact area of the undivided roller as in conventional flywheels, and the load on the contact area between the rollers and the rolling surface The wear of the flywheel is greatly reduced and the durability of the flywheel is improved.

Embodiments Hereinafter, preferred embodiments of the torque fluctuation absorbing flywheel of the present invention will be described with reference to the drawings.

1 to 3 show a torque fluctuation absorbing flywheel according to a first embodiment of the present invention. As shown in the figure, the flywheel has a flywheel body 11 and a cover 12, and the flywheel body 11 is attached to a crankshaft 1 of an internal combustion engine.
3.

The inner peripheral wall surface 14 of the outer peripheral wall of the flywheel main body 11 defines a plurality of rolling surfaces 16 in a substantially semicircular concave shape toward the inside, and each rolling surface 16
Each has a concave space chamber 15 inside. The concave chamber 15 is covered by a cover 12, which is attached to the flywheel body 11 with bolts 17.

A roller 18 is housed in each chamber 15 so as to be able to freely roll on the rolling surface 16. The roller 18 is divided into a plurality of pieces in the axial direction of the roller, and each roller 18a,
One roller 18 is formed by overlapping the rollers 18b, . . . with the same axes. Each roller 18a, 18
b, . . . are stacked one on top of the other with their sides slidable relative to each other. In the first embodiment, each roller 18a, 18
b, . . . have the same thickness and the same planar shape, and when stacked with the same axis, they form a cylindrical shape.

In the flywheel of the first embodiment configured as described above, the rollers 18 roll on the rolling surface 16 to absorb torque fluctuations. Since forces are applied to the roller 18 in various directions, the roller 18 may tend to tilt in the axial direction. When the roller 18 is tilted, the side surfaces of the divided rollers 18a, 18b, ... slide together, causing the axes to shift from each other as shown in Figure 3, and the outer peripheral end surface of each roller rolls. Contact surface 16. Therefore, from the rollers 18a, 18b to the rolling surface 16
The force exerted on the contact portions 19a, 19b, . . . is dispersed, and the force applied to the rolling surface 16 at each contact portion 19a, 19b is reduced compared to the conventional concentrated load. Therefore, wear and deformation of the rollers 18 and rolling surfaces 16 are reduced, and the durability of the variable speed dynamic damper is improved.

Further, in the above flywheel, when the roller 18 collides with the flywheel main body 11 and the cover 12, each of the divided rollers 18a, 18
b... weakens the impact force by small collisions or by sliding against each other, so it is also possible to reduce the collision noise between the rollers and the flywheel, which has been a problem with conventional flywheels.

4 and 5 show a torque fluctuation absorbing flywheel according to a second embodiment of the present invention. As shown in the figure, in this example, the roller 2
0 is divided in the axial direction into rollers 20a, 20b, . . . having different thicknesses. The roller 20 may be divided into two parts in the axial direction as shown in FIG. 4, or into three or more parts as shown in FIG. Since the other configurations are similar to those of the first embodiment, similar parts are given the same reference numerals as those of the first embodiment, and explanations thereof will be omitted.

In the second embodiment configured as described above, since the divided rollers 20a, 20b, . . . have different thicknesses, the respective rollers 20a, 20b, .
The mass also changes, and when the rollers collide, the number of smaller collisions increases, and the effect of preventing the whole body from colliding together and producing loud collision sounds is improved.

6 and 7 show a torque fluctuation absorbing flywheel according to a third embodiment of the present invention. As shown in the figure, in this embodiment, the rollers 21 have rollers 21a, 21b, . . . having different diameters.
It is divided axially into The roller 21 may be divided into two parts in the axial direction as shown in FIG. 6, or into three or more parts as shown in FIG. In the case of FIG. 7, the diameters of the rollers 21a, 21b, . . . may change symmetrically with respect to the center roller.
Since the other configurations are similar to those of the first embodiment, similar parts are given the same reference numerals as those of the first embodiment, and explanations thereof will be omitted.

In the third embodiment configured as described above, the divided rollers 21a, 21b, . . . have different diameters, so the respective rollers 21a, 21b, .
This makes it possible to reduce torsional vibrations of individual frequencies, resulting in a variable speed dynamic damper that can reduce torsional vibrations of more frequencies.

Therefore, when using the apparatus of each embodiment as described above, even if the rollers 18, 20, 21 are tilted, the fulcrums are dispersed, so the load applied to the rolling surface 16 is reduced, and the rolling surface The effect of improving the durability in No. 16 can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of the torque fluctuation absorbing flywheel according to the present invention with the cover removed, Fig. 2 is a half-sectional side view of the flywheel according to the first embodiment of the present invention, and Fig. 3 is a side view of the flywheel according to the first embodiment of the present invention. Enlarged view of the vicinity of the roller portion of the flywheel when the roller is tilted in Figure 2, No. 4
The figure is an enlarged sectional view of the vicinity of the rollers of a flywheel according to the second embodiment of the present invention, and FIG. 5 is an enlarged view of the vicinity of the rollers of a flywheel in a different aspect from that shown in FIG. The sectional view, Figure 6, is the third figure of the present invention.
FIG. 7 is an enlarged sectional view of the vicinity of the roller of the flywheel according to the embodiment, and FIG. 8 is an enlarged sectional view of the vicinity of the roller of the flywheel in a different aspect from FIG. FIG. 2 is an enlarged cross-sectional view of the vicinity of the rollers of a conventional flywheel. 11... Flywheel body, 12... Cover, 15... Chamber, 16... Rolling surface, 18, 20,
21...Koro, 18a, 18b,...20a, 20
b, ..., 21a, 21b, ..., ... divided rollers.

Claims (1)

[Scope of utility model registration request] 1. A flywheel for absorbing torque fluctuations, wherein rollers are provided in a chamber provided with a rolling surface, and torque fluctuations are absorbed by the rolling motion of the rollers, characterized in that the rollers are divided into a plurality of pieces in the axial direction.