JP6069290B2 - Flywheel - Google Patents

Description

  The present invention relates to a flywheel.

  Generally, in a rotating machine such as an internal combustion engine of a vehicle, a flywheel is attached to one end of a crankshaft. The flywheel has a relatively large moment of inertia, whereby the rotational energy associated with the rotational motion of the crankshaft is conserved, so that a stable rotational motion of the crankshaft is obtained.

  2. Description of the Related Art Conventionally, as a kind of such a flywheel, one having a metal elastic disk (flexible plate) that absorbs and attenuates bending vibrations acting on a crankshaft by elastic deformation is known. Such a flywheel is generally called a flexible flywheel, and an elastic disc is fixed to the end of the crankshaft by a bolt or the like, and a mass portion is provided at a peripheral portion of the elastic disc.

  In such a flexible flywheel, as a structure for fixing an elastic disk and a crankshaft using bolts, a technique in which a disk member is interposed between the two is known. In this case, the disk member may be provided to play the role of a flat washer, but adopts a configuration in which the disk diameter is extended to the outer peripheral side from the bolt fastening part, and the rotation center of the elastic disk There is also one in which the rigidity on the side is increased (for example, refer to Patent Document 1 for the latter).

JP-A-8-170650

  In this way, by providing the disk member at the connecting portion between the elastic disk and the crankshaft, the rigidity of the elastic disk on the rotation center side is increased as compared with the configuration without it.

  However, in the conventional configuration in which the disk member is provided only on one side of both sides of the elastic disk, it is still insufficient to ensure the rigidity of the elastic disk, and further improvement in rigidity is required. Yes.

  Then, this invention makes it the main objective to obtain the flywheel which can improve the rigidity of an elastic disk further.

  In order to solve the above problems, the following means were adopted.

In the flywheel according to the first aspect of the present invention, an elastic disc that is fixed to an end portion of the shaft of the rotating machine and absorbs vibrations acting on the shaft, and a mass portion provided on the outer peripheral portion of the elastic disc A first disc member fixed to the end of the shaft together with the elastic disc in a state of being overlapped with the elastic disc, and on the opposite side of the first disc member across the elastic disc A second disk member that is superimposed on the elastic disk and is fixed to the end of the shaft together with the elastic disk and the first disk member in this state, and the elastic disk is flat An attachment disc portion that is formed in a disc shape and is attached to the shaft, an intermediate annular portion that extends from the outer peripheral portion of the attachment disc portion and is inclined or curved in the axial direction of the shaft, and an outer periphery of the intermediate annular portion An outer annular portion extending from the portion to the mass portion It has the first disk member and the second disk member, the outer peripheral edge is provided on the inner peripheral side of the mass portion, and a contact disc portion abutting the mounting disc portion , the contact circle provided around the plate portion, characterized in that it has a an outer peripheral portion formed along the intermediate annular portion.

  According to the first aspect of the present invention, unlike the conventional configuration in which the disk member is provided only on one side of the elastic disk, the elastic disk is in a state in which the disk members are superimposed on both sides thereof. Fixed to the shaft. In other words, the contact disk part and the outer peripheral part, which form a shape along the attachment disk part of the elastic disk and the surrounding intermediate annular part, sandwiched them while contacting the attachment disk part and the intermediate annular part. It is in a state.

  Here, when vibration is applied to the rotating shaft and the elastic disk is elastically deformed, stress due to the elastic deformation concentrates on the portion of the elastic disk near the rotation center including the mounting disk portion and the intermediate annular portion. Cheap. In particular, since the stress applied to the rotation center side is greater than that on the outer peripheral side, considerable stress acts on the intermediate annular portion.

  In that respect, in the present invention, since the range including not only the attachment disc portion of the elastic disc but also the intermediate annular portion is in a state sandwiched between the first disc member and the second disc member, Elastic deformation in a range including the annular portion is received by the disk members on both sides. Thereby, the rigidity in an intermediate | middle annular part with a big stress load can be improved, and durability of an elastic disc can be improved.

  According to a second aspect of the present invention, in the first aspect, the outer annular portion includes a first outer annular portion that extends from the intermediate annular portion, and extends from the first outer annular portion, and is inclined in the axial direction of the shaft. A second outer annular portion that is curved, and a third outer annular portion that extends from the second outer annular portion and is provided with the mass portion at an outer peripheral edge portion.

  In the configuration of the invention according to claim 2, in the elastic disc, the portion inclined or curved in the axial direction of the shaft is not only the intermediate annular portion but also the second outer annular portion in a portion closer to the outer periphery than that. There is a department. Even in that case, the disk member is provided on both sides of the intermediate annular part, but the disk member is not provided on the second outer annular part. This is because the second outer annular portion is on the outer peripheral side of the intermediate annular portion, so the magnitude of the stress applied thereto is not as high as that of the intermediate annular portion, but conversely the disk members on both sides up to the second outer annular portion. If the structure provided with is adopted, the elastic force of the elastic disk is reduced instead. Therefore, even if there are a plurality of inclined or curved portions, only the portion near the rotation center where the stress load is large is provided with disk members on both sides thereof, so that the elastic force can be maintained while increasing the rigidity. it can.

According to a third aspect of the present invention, in the second aspect, the mass portion is provided only on the outer peripheral side of the first outer annular portion.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the outer peripheral portion of each of the disk members is extended to reach the outer annular portion of the elastic disk. Features.

According to the fourth aspect of the present invention, since the outer peripheral portion of each disk member extends to the outer annular portion of the elastic disc, the intermediate annular portion and the outer annular portion The boundary portion also becomes a receiving region by the disk member. Since the stress load is relatively large even in such a boundary part, the rigidity of the elastic disk can be increased and the durability can be further improved by receiving the part by the disk member.

According to a fifth aspect of the present invention, in the fourth aspect , the outer annular portion is provided with a through hole in a portion near the inner periphery thereof, and the outer peripheral portion of each disk member is more than the through hole. It is characterized by extending to the inner peripheral side portion.

According to the fifth aspect of the present invention, the outer annular portion of the elastic disk is easily bent due to the presence of the through hole, and until the outer peripheral portion of each disk member reaches the inner peripheral side portion of the through hole. By extending (that is, before that), the function of the through hole is not hindered. Further, in the outer annular portion, the inner peripheral portion of the through hole is also sandwiched from both sides by the outer peripheral portion of the disk member, whereby the rigidity at that portion is enhanced.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the outer peripheral portion of each of the disk members is such that the edge on the elastic disk side gradually moves away from the elastic disk. It is characterized by being formed.

If the elastic disk side of the outer peripheral edge of the disk member is angular, when the elastic disk is deformed due to vibration absorption, the angular part and the elastic disk collide with each other. The plate is scratched, and the scratch can cause damage to the elastic disk. In that respect, according to the invention described in claim 6 , the outer peripheral edge of the disk member is formed so as to gradually move away from the elastic disk, and therefore is not in an angular state. Thereby, it can suppress that a damage | wound arises in an elastic disk by the collision with the outer periphery part of each disk member, and can improve the durability of an elastic disk.

Sectional drawing of a flexible flywheel. The exploded perspective view of a flexible flywheel. The enlarged view about A part enclosed with the dashed-dotted line in FIG.

  Hereinafter, an embodiment in which the present invention is applied to a flexible flywheel connected to a crankshaft of an internal combustion engine (engine) of a vehicle as a rotating machine will be described with reference to FIGS. 1 to 3. FIG. 1 is a cross-sectional view of a flexible flywheel, and FIG. 2 is an exploded perspective view of the flexible flywheel. FIG. 3 is an enlarged view of a portion A surrounded by a dashed line in FIG.

  First, the basic configuration of the flexible flywheel will be described.

  As shown in FIGS. 1 and 2, the flexible flywheel 10 includes a flexible plate 11 as an elastic disk and an inertia ring 12. The flexible flywheel 10 is fixed to the crankshaft S by being bolted to the front end of the crankshaft S with a fastening bolt B1 at the center of the flexible plate 11. A circular positioning hole 11 a is formed in the central portion of the flexible plate 11. By inserting the tip protrusion Sa of the crankshaft S into the positioning hole 11a, positioning is performed so that the rotation center of the crankshaft S and the center of the flexible plate 11 are the same.

  The flexible plate 11 is made of metal such as iron and has a disk shape as a whole. The flexible plate 11 has a mounting disc part 21, an annular ridge part 22, and an outer edge annular part 23. The attachment disc portion 21 is formed in a flat disc shape and has a larger diameter than the tip attachment surface of the crankshaft S. The positioning hole 11 a is formed in the central portion of the attachment disc portion 21.

  The annular raised portion 22 is formed in a raised state when viewed from the side (hereinafter referred to as “front side”) opposite to the side where the crankshaft S is present (the side where the engine is present) in the axial direction of the crankshaft S. Yes. The annular raised portion 22 is provided so as to form an annular shape around the attachment disk portion 21, and has an inner tapered portion 24, an annular flat portion 25, and an outer tapered portion 26.

  The inner taper portion 24 extends from the outer peripheral portion of the attachment disc portion 21 and is inclined toward the front side. The annular flat surface portion 25 extends from the outer peripheral portion of the inner tapered portion 24 and is parallel to the mounting disk portion 21. The outer tapered portion 26 extends from the outer peripheral portion of the annular flat portion 25 and is inclined toward the side where the crankshaft S is present (the engine is present) in the axial direction of the crankshaft S (hereinafter referred to as “back side”). ing.

  The outer edge annular portion 23 is an outer edge portion of the flexible plate 11 formed so as to extend from the outer peripheral side of the outer tapered portion 26, and is parallel to the attachment disc portion 21. In the present embodiment, the inner tapered portion 24 corresponds to an intermediate annular portion, and the annular raised portion 22 and the outer edge annular portion 23 constitute an outer annular portion. Further, the annular flat portion 25 corresponds to the first outer annular portion, the outer tapered portion 26 corresponds to the second outer annular portion, and the outer edge annular portion 23 corresponds to the third outer annular portion.

  The annular flat surface portion 25 is provided with a number of stress relaxation holes 27a that are through holes penetrating in the plate thickness direction over the entire circumferential direction. Similarly, the outer edge annular portion 23 is provided with a number of stress relaxation holes 27b. By devising the shape, size, number, etc. of the stress relaxation holes 27a, 27b, the ease of bending of the first plate 13 is arbitrarily adjusted, and the stress acting on the flexible plate 11 is relaxed.

  The mounting disc portion 21 is provided with an inner bolt insertion hole 28, and the outer edge annular portion 23 is provided with an outer bolt insertion hole 29. A plurality of these bolt insertion holes 28 and 29 are provided (eight in FIG. 2), and they are annularly arranged at equal intervals.

  On the other hand, the inertia ring 12 is made of cast iron and is formed in an annular shape. The annular portion of the inertia ring 12 is a mass portion 31, and when the flexible flywheel 10 rotates, a relatively large moment of inertia force can be obtained by the weight of the mass portion 31.

  As shown in FIG. 1, a mounting groove 32 is formed on the back side of the mass portion 31. The attachment groove 32 is formed in accordance with the size of the flexible plate 11 so that the flexible plate 11 is accommodated in the attachment groove 32. A bolt hole 33 in which a female screw is formed is provided on the bottom surface of the mounting groove 32. The same number of the bolt holes 33 as the outer bolt insertion holes 29 of the outer edge annular portion 23 in the flexible plate 11 are provided, and they are arranged at equal intervals.

  After the flexible plate 11 is fitted into the mounting groove 32 of the inertia ring 12, the positions of the outer bolt insertion hole 29 and the bolt hole 33 are aligned, and the flexible plate 11 and the inertia ring 12 are moved by the fastening bolt B2. Connected. In this case, the bolt is tightened from the back side of the flexible plate 11 by the fastening bolt B2. Thereby, the flexible flywheel 10 in which both are integrated is obtained.

  In such a flexible flywheel 10, the back surface (the left surface in FIG. 1) of the flexible plate 11 is an attachment surface with the crankshaft S. Therefore, the flexible flywheel 10 is fixed to the crankshaft S as follows.

  That is, the back surface of the mounting disc portion 21 is brought into contact with the end surface of the crankshaft S, and the fastening bolt B1 is inserted into the inner bolt insertion hole 28 of the mounting disc portion 21 and bolted, whereby the flexible flywheel 10 is It is fixed to the crankshaft S. In the fixing to the crankshaft S, the bolt is tightened from the front side of the flexible plate 11 by the fastening bolt B1. The bolt tightening direction is opposite to the bolt tightening direction when the outer ring is connected to the inertia ring 12.

  The above is the basic configuration of the flexible flywheel 10, and the flexible flywheel 10 of this embodiment includes the following configuration in addition to the basic configuration.

  That is, as shown in FIG. 1, a pair of center plates 41 and 51 are provided on both sides of the flexible plate 11 in order to fix the flexible flywheel 10 to the end of the crankshaft S. In other words, the flexible plate 11 has its mounting disc portion 21 and its peripheral portion sandwiched between the center plates 41 and 51, and is fixed to the end portion of the crankshaft S by the fastening bolt B1 in this state.

  Both the center plates 41 and 51 are made of a metal material such as iron and have a disk shape as a whole. In the following description, when the center plates 41 and 51 are described separately, the first center plate 41 is provided on the front side of the flexible plate 11 and the second center plate 51 is provided on the back side. And The first center plate 41 corresponds to a first disk member, and the second center plate 51 corresponds to a second disk member.

  The diameter of each center plate 41, 51 is larger than the combined diameter of the mounting disk portion 21 and the inner tapered portion 24 of the flexible plate 11. Each center plate 41, 51 has a shape along the attachment disc portion 21 and the inner taper portion 24, whereby the center disc portions 42, 52, the first outer peripheral portions 43, 53, and the first discs. It is divided into two outer peripheral parts 44 and 54. In this embodiment, the central disk portions 42 and 52 correspond to the contact disk portions, and the first outer peripheral portions 43 and 53 and the second outer peripheral portions 44 and 54 constitute the outer peripheral portion.

  Each central disc part 42 and 52 has the same diameter as the attachment disc part 21 of the flexible plate 11, and has a flat disc shape. Central circular holes 42a and 52a having the same diameter as the positioning holes 11a of the flexible plate 11 are formed at the central portions of the central disk portions 42 and 52, respectively. The center circular holes 42a and 52a are inserted into the front end protrusions Sa of the crankshaft S as positioning holes for the center plates 41 and 51, respectively. The central disc portions 42 and 52 are provided with the same number of bolt insertion holes 45 and 55 as the inner bolt insertion holes 28 of the attachment disc portion 21. The first outer peripheral portions 43 and 53 are annularly provided on the outer peripheral side of the central disk portions 42 and 52, and have the same width and the same inclination angle as the inner tapered portion 24 of the flexible plate 11, as shown in FIG. It is formed as follows.

  The second outer peripheral portions 44 and 54 are outer peripheral edge portions of the center plates 41 and 51, and are provided annularly on the outer peripheral side of the first outer peripheral portions 43 and 53. The second outer peripheral portions 44 and 54 are formed in a state parallel to the central disk portions 42 and 52. For this reason, when the center plates 41 and 51 are superimposed on the flexible plate 11, the second outer peripheral portions 44 and 54 come into contact with the annular flat portion 25 of the flexible plate 11. Therefore, in the overlapping state, the outer peripheral edges of the center plates 41 and 51 extend from the inner tapered portion 24 of the flexible plate 11 to the inner peripheral portion of the annular flat portion 25 by the second outer peripheral portions 44 and 54. In the extended state.

  Of the edge portions of the second outer peripheral portions 44, 54, the side that comes into contact with the flexible plate 11, that is, the second outer peripheral portion 44 of the first center plate 41, the back surface side thereof is the second outer peripheral portion 54 of the second center plate 51. Is formed such that its surface side gradually moves away from the flexible plate 11. Thereby, these edge portions become rounded portions 46 and 56 and are provided over the entire circumferential direction.

  When the flexible plate 11 is fixed to the end surface of the crankshaft S, the first center plate 41 has its back surface in contact with the front surface of the flexible plate 11, and the second center plate 51 has its surface in contact with the back surface of the flexible plate 11. And overlap. As a result, the portions near the inner periphery of the mounting disk portion 21, the inner tapered portion 24 and the annular flat portion 25 of the flexible plate 11 are sandwiched between the center plates 41 and 51, and the portions are shown in FIGS. Thus, they are in surface contact with each other. In this state, the fastening bolt B1 is inserted into the bolt insertion holes 45 and 55 of the center plates 41 and 51 and the inner bolt insertion hole 28 of the mounting disc portion 21, and the flexible plate 11 is bolted by the fastening bolt B1. .

  As described above, in the flexible flywheel 10 of the present embodiment, the flexible plate 11 is sandwiched between the two center plates 41 and 51 and is fixed to the end of the crankshaft S in that state.

  Next, the operation of the flexible flywheel 10 having the above configuration will be described.

  Since the flexible flywheel 10 is provided at the end portion of the crankshaft S, an inertia moment is generated by the mass portion 31 of the inertia ring 12, and a stable rotation operation of the crankshaft S is thereby obtained. When bending vibration or the like acts on the crankshaft S due to the driving of the engine, the flexible plate 11 is elastically deformed and absorbs and attenuates the bending vibration or the like. Thereby, vibration etc. are suppressed, obtaining the stable rotation operation of the crankshaft S.

  Here, when the flexible plate 11 is elastically deformed and absorbs vibration, the stress acting on the inner peripheral side portion of the flexible plate 11 near the rotation center of the crankshaft S is considerable as compared with the outer peripheral side portion. It will be something. Even at the inner peripheral side portion (more specifically, the inner peripheral side portion of the mounting disc portion 21, the inner tapered portion 24 and the annular flat portion 25), stress tends to concentrate particularly on the inner tapered portion 24.

  In this regard, in the flexible flywheel 10, the inner peripheral portion of the flexible plate 11 is sandwiched between the two center plates 41 and 51 and is in surface contact with the center plates 41 and 51. For this reason, if a stress acts on the inner peripheral side portion and the deformation is attempted, the deformation is received by the center plates 41 and 51 on both sides. Thereby, the rigidity in the inner peripheral side part including the inner side taper part 24 with large stress load can be improved, and durability of the flexible plate 11 can be improved.

  When the center plates 41 and 51 receive the deformation of the flexible plate 11 as described above, unlike the case where the outer peripheral edge is squared by the rounded portions 46 and 56 of the second outer peripheral portions 44 and 54, the flexible plate 11 is damaged. Is suppressed.

  According to the flexible flywheel 10 of the present embodiment described in detail above, the following excellent effects can be obtained.

  As described above, the inner peripheral portion of the flexible plate 11 is sandwiched between the two center plates 41 and 51 and is in surface contact with the center plates 41 and 51. Thereby, the durability of the flexible plate 11 that absorbs bending vibration of the crankshaft S by elastic deformation can be enhanced.

  The flexible plate 11 has two inclined portions, that is, an inner tapered portion 24 and an outer tapered portion 26, but the center plates 41 and 51 are not provided on the outer tapered portion 26. The outer taper portion 26 is on the outer peripheral side of the inner taper portion 24, and the magnitude of stress applied thereto is not as great as that of the inner taper portion 24. Conversely, if the center plates 41 and 51 are expanded to reach the outer tapered portion 26, the elastic force of the flexible plate 11 is reduced. Thus, since the center plates 41 and 51 are provided only on the inner taper portion 24 near the rotation center where the stress load is large, the elastic force can be maintained while increasing the rigidity.

  Since each center plate 41, 51 has the second outer peripheral portion 44, 54, the boundary portion between the inner tapered portion 24 and the annular flat portion 25 also becomes a receiving region by each center plate 41, 51. Since the stress load is relatively large even in such a boundary portion, the deformation of the portion is received by the center plates 41 and 51, whereby the rigidity of the flexible plate 11 can be increased and the durability can be further improved.

  Since the stress relaxation hole 27a is formed in the annular flat portion 25 of the flexible plate 11, the portion is formed in a state where it is easily bent. Thereby, the vibration absorption performance of the flexible plate 11 is enhanced. And since the 2nd outer peripheral parts 44 and 54 of each center plate 41 and 51 are stopped in the inner peripheral side part (namely, the front) of the stress relaxation hole 27a, the stress relaxation hole 27a is 2nd outer periphery. It is not blocked by the parts 44 and 54. Thereby, even if the 2nd outer peripheral parts 44 and 54 are formed until it reaches the annular plane part 25, the function of the stress relaxation hole 27a is not inhibited.

  In addition, since the inner peripheral portion of the annular flat portion 25 is sandwiched from both sides by the second outer peripheral portions 44 and 54 with respect to the stress relaxation hole 27a, the rigidity at that portion is enhanced. The formation of the stress relaxation hole 27a provides flexibility, but when an excessive stress load is applied, a radial crack is likely to occur in the inner peripheral portion of the stress relaxation hole 27a. In that respect, since the rigidity of the inner peripheral side portion of the stress relaxation hole 27a is enhanced by the second outer peripheral portions 44, 54, even if an excessive stress load is applied, the inner peripheral side portion is not a radial crack. In addition, a crack generation site can be induced in an annular crack generated in a region sandwiched between the center plates 41 and 51.

  In the second outer peripheral portions 44 and 54 of the center plates 41 and 51, the contact side with the flexible plate 11 is the round portions 46 and 56, and is not in an angular state. Thereby, at the time of impact absorption, damage to the flexible plate 11 due to the collision between the center plates 41 and 51 and the flexible plate 11 is suppressed, and the durability of the flexible plate 11 can be improved.

[Other Embodiments]
(1) In the present embodiment, the center plates 41 and 51 have the second outer peripheral portions 44 and 54 on the outer peripheral side of the first outer peripheral portions 43 and 53. You may employ | adopt the structure which abbreviate | omitted. Even in such a configuration, the inner taper portion 24 where stress is likely to be concentrated is sandwiched between the center plates 41 and 51. Therefore, the rigidity of the flexible plate 11 can be increased as compared with the configuration in which only the attachment disk portion 21 is sandwiched between the center plates 41 and 51. However, in terms of improving the rigidity, a configuration having the second outer peripheral portions 44 and 54 as in the present embodiment is preferable.

  (2) In the present embodiment, for each center plate 41, 51, the first outer peripheral portion 43, 53 and the second outer peripheral portion 44, 54 are provided over the entire circumferential direction. It may be in a missing state. Even in a state where a part in the circumferential direction is cut off, if the first outer peripheral portions 43 and 53 and the second outer peripheral portions 44 and 54 are provided in an annular shape, the elastic deformation of the flexible plate 11 is received. be able to. However, in terms of improving rigidity, a configuration having the first outer peripheral portions 43 and 53 and the second outer peripheral portions 44 and 54 over the entire circumferential direction as in the present embodiment is preferable.

  (3) In the present embodiment, the flexible plate 11 and the center plates 41 and 51 are configured to be in direct contact with each other and overlapped. However, even if a cushioning member such as an anti-vibration rubber is interposed therebetween, Good. Thereby, the friction between the flexible plate 11 and the center plates 41 and 51 is suppressed by the buffer member interposed therebetween, and the damage to the flexible plate 11 can be further suppressed.

  (4) In the present embodiment, one center plate 41, 51 is provided on each side of the flexible plate 11. However, a plurality of center plates 41, 51 are provided on each side or one side. A configuration may be adopted. In this case, increasing the number of center plates 41 and 51 can contribute to improving the rigidity of the flexible plate 11. However, if the number of the center plates 41 and 51 is increased, it is necessary to consider reducing the elastic force at the inner peripheral side portion of the flexible plate 11 accordingly.

  (5) In the present embodiment, the flexible plate 11 has the inner tapered portion 24 as the intermediate annular portion and the outer tapered portion 26 as the second outer annular portion, but the intermediate annular portion and the second outer annular portion. As a part, you may make it make the shape curved in the axial direction of the crankshaft S instead of inclining linearly.

  (6) In the present embodiment, for each center plate 41, 51, the second outer peripheral portions 44, 54 are provided with rounded portions 46, 56, but the rounded portions 46, 56 are eliminated and the center plates 41, 51 are angular. It is good also as a shape. However, in order to prevent the flexible plate 11 from being damaged, the configuration having the rounded portions 46 and 56 is preferable.

  (7) In the present embodiment, an internal combustion engine (engine) of a vehicle is assumed as the rotating machine. However, the application of the present invention is not limited thereto, and rotation stabilization and rotational energy using the moment of inertia are used. As long as it is used for the purpose of preserving the storage, for example, its application target is arbitrary such as a press machine.

  DESCRIPTION OF SYMBOLS 10 ... Flexible flywheel, 11 ... Flexible plate (elastic disk), 21 ... Mounting disk part, 22 ... Annular ridge part (outer side annular part), 23 ... Outer edge annular part (outer side annular part, 3rd outer side annular part) , 24 ... inner tapered part (intermediate annular part), 25 ... annular flat part (second outer annular part), 26 ... outer tapered part (outer annular part, second outer annular part), 31 ... mass part, 41 ... first 1 center plate (first disc member), 51... Second center plate (second disc member), 42, 52... Central disc portion (contact disc portion). 43, 53: first outer peripheral portion (outer peripheral portion), 44, 54: second outer peripheral portion (outer peripheral portion), S: crankshaft (shaft).

Claims (6)

An elastic disc fixed to the end of the shaft of the rotating machine and absorbing vibration acting on the shaft;
A mass portion provided on an outer peripheral portion of the elastic disc;
A first disk member fixed to the end of the shaft together with the elastic disk in a state of being overlapped with the elastic disk;
The elastic disk is overlapped with the elastic disk on the opposite side of the first disk member, and is fixed to the end of the shaft together with the elastic disk and the first disk member in this state. Two disk members;
With
The elastic disk is
A mounting disc portion formed in a flat disc shape and attached to the shaft;
An intermediate annular portion that extends from the outer peripheral portion of the mounting disc portion and is inclined or curved in the axial direction of the shaft; and an outer annular portion that extends from the outer peripheral portion of the intermediate annular portion to the mass portion ;
Have
The first disc member and the second disc member are provided with an outer peripheral edge on an inner peripheral side with respect to the mass portion,
An abutting disc portion that abuts the mounting disc portion;
As provided around the abutment disc portion, the flywheel being characterized in that a an outer peripheral portion formed along the intermediate annular portion.   The outer annular portion includes a first outer annular portion extending from the intermediate annular portion, a second outer annular portion extending from the first outer annular portion and inclined or curved in the axial direction of the shaft, and a second outer annular portion thereof. The flywheel according to claim 1, further comprising a third outer annular portion extending from the portion and provided with the mass portion at an outer peripheral edge portion. The flywheel according to claim 2, wherein the mass portion is provided only on an outer peripheral side of the first outer annular portion. The outer peripheral portion of the disc member is a flywheel according to any one of claims 1 to 3, characterized in that it extends up to the outer annular portion of the elastic disc. The outer annular portion is provided with a through hole in a portion closer to the inner periphery, and the outer peripheral portion of each disk member extends to the inner peripheral side portion from the through hole. The flywheel according to claim 4 , wherein the flywheel is characterized. The outer peripheral portion of the disc member is in any one of claims 1 to 5 edges of the side of the elastic disc is characterized in that it is formed away gradually from the elastic disc The described flywheel.

Images