JP2016160983A - Vibration absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration absorber capable of improving an assembly characteristic of a mass body and restricting occurrence of irregular noise caused by motion [vibration] of the mass body in its axial direction by a relative simple configuration.SOLUTION: A vibration absorber 6 comprises a housing 8 arranged at a crank shaft 7 for transmitting a power force of an engine 2, a center plate 9 arranged inside the housing 8 along a direction crossing at a right angle with an axial direction of the crank shaft 7 and a pair of mass bodies arranged to hold the center plate 9 from both sides of an axial direction of the crank shaft 7. The pair of mass bodies comprises a first mass body 13 arranged at one side of the center plate and a second mass body 14 arranged at the other side of the center plate. The first mass body 13 and the second mass body 14 are constituted by separate members.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration absorbing device that absorbs vibration serving as a vibration source.

  2. Description of the Related Art Conventionally, in a vehicle, there has been proposed a device that reduces rotational fluctuations generated on a crankshaft due to torque fluctuations of an automobile engine. For example, a conventional torsional damping device includes a vibration attenuator having an inertial mass. The inertia mass body is composed of two mass bodies, and both mass bodies are coupled to each other via a rivet coupling portion (see, for example, Patent Document 1).

  Conventionally, a device has been proposed in which a rolling chamber is formed in the flywheel body, and a damper mass (mass body) is accommodated in the rolling chamber (see, for example, Patent Document 2). In this conventional flywheel, vibration of the damper mass in the axial direction (crankshaft axial direction) is prevented, and generation of abnormal noise due to vibration of the damper mass in the axial direction is suppressed. Specifically, by forming a convex portion that is continuous in the circumferential direction on the damper mass and forming a concave portion that meshes with the convex portion and is continuous in the rolling direction on the rolling surface of the rolling chamber, The axial runout of the is prevented.

Japanese Patent Laid-Open No. 2003-4101 JP-A-6-193684

  However, in the conventional torsional damping device, it is necessary to connect the two mass bodies to each other by the rivet coupling portion, and it takes time to assemble the mass bodies, that is, there is a problem that the assemblability of the mass bodies is low. there were.

  Further, in the conventional flywheel, in order to prevent the damper mass from swinging in the axial direction, a convex portion that is continuous in the circumferential direction is formed on the damper mass, and the convex portion meshes with the convex portion on the rolling surface of the rolling chamber. And the recessed part which continues in a rolling direction is formed. However, when such a configuration is adopted, there is a problem that the shapes of the damper mass and the rolling surface become complicated, high machining accuracy is required, and this leads to high costs.

  This invention is made | formed in view of said subject, and can improve the assembly property of a mass body. It is another object of the present invention to provide a vibration absorber capable of suppressing the generation of abnormal noise caused by movement (vibration) of the mass body in the axial direction with a relatively simple configuration.

  The vibration absorbing device of the present invention is a vibration absorbing device that absorbs engine vibration, and the vibration absorbing device includes a housing provided on a power transmission shaft that transmits power of the engine, and an axial direction of the power transmission shaft. And a pair of mass bodies arranged so as to sandwich the center plate from both sides in the axial direction of the power transmission shaft. The mass body includes a first mass body disposed on one side of the center plate, and a second mass body disposed on the other side of the center plate, and the first mass body, The second mass body is configured separately.

  With this configuration, the first mass body and the second mass body can be separately disposed on both sides of the center plate. In this case, it is not necessary to fix the first mass body and the second mass body to each other. Therefore, the mass body can be easily assembled as compared with the conventional case, and the assemblability of the mass body is improved. Furthermore, it is possible to suppress the generation of abnormal noise due to the movement (sway) of the mass body in the axial direction with a relatively simple configuration as compared with the prior art. In addition, it is possible to reduce wear caused by movement (swing) of the mass body in the axial direction.

  In the vibration absorber of the present invention, a plurality of the first mass bodies are arranged on one side of the center plate, and a plurality of the second mass bodies are arranged on the other side of the center plate. May be arranged.

  With this configuration, the plurality of first mass bodies and the plurality of second mass bodies can be separately disposed on both sides of the center plate. In this case, it is not necessary to fix each of the plurality of first mass bodies and each of the plurality of second mass bodies to each other. Therefore, a plurality of mass bodies can be easily assembled as compared with the conventional case, and the assemblability is improved.

  In the vibration absorber of the present invention, the center plate includes a first rolling surface member having a first rolling surface on which the first mass body rolls, and the second mass body. And a second rolling surface member having a second rolling surface that rolls.

  With this configuration, the center plate is provided with the first rolling surface and the second rolling surface. The vibration of the engine can be absorbed by the first mass body and the second mass body rolling on the first rolling surface and the second rolling surface, respectively.

  In the vibration absorbing device of the present invention, the center plate includes a first regulating surface member having a first regulating surface that regulates movement of the first mass body toward the inner peripheral side, and the second plate. And a second regulating surface member having a second regulating surface that regulates the movement of the mass body toward the inner peripheral side.

  With this configuration, the center plate is provided with the first restriction surface and the second restriction surface. The movement of the first mass body and the second mass body to the inner peripheral side (in the radial direction of the power transmission shaft) can be regulated by the first regulation surface and the second regulation surface.

  According to the present invention, the assembly of the mass body can be improved by configuring the first mass body and the second mass body separately. In addition, it is possible to suppress the generation of abnormal noise due to the movement (sway) of the mass body in the axial direction with a relatively simple configuration as compared with the prior art.

It is a block diagram at the time of applying the vibration absorber in embodiment of this invention to a vehicle. It is a sectional side view explaining the structure of the vibration absorber in embodiment of this invention. (A) It is the top view seen from the axial direction which shows the structure of the center plate shown in FIG. (B) It is explanatory drawing in the III-III cross section of Fig.3 (a) which shows the structure of the center plate shown in FIG. (A) It is the top view seen from the axial direction which shows the structure of the control surface member shown in FIG. (B) It is explanatory drawing in the IV-IV cross section of Fig.4 (a) which shows the structure of the control surface member shown in FIG. (A) It is the top view seen from the axial direction which shows the structure of the rolling surface member shown in FIG. (B) It is explanatory drawing in the VV cross section of Fig.5 (a) which shows the structure of the rolling surface member shown in FIG. It is the top view seen from the axial direction explaining the structure (assembly of a mass body) of the vibration absorber in embodiment of this invention. It is a side view explaining the structure (assembly of a mass body) of the vibration-absorbing device in embodiment of this invention.

  Hereinafter, a vibration absorber according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case of a vibration absorbing device that absorbs vibration of an engine or the like that becomes a vibration source of an automobile is illustrated.

  A configuration of a vibration absorber according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram when the vibration absorbing device of the present embodiment is applied to a vehicle. As shown in FIG. 1, the vehicle 1 includes an engine 2 and a transmission 3, and the rotational driving force (output from the transmission 3) of the engine 2 is changed to the left and right via a differential gear device (diff) 4. Is distributed to the wheels 5 and transmitted. Between the engine 2 and the transmission 3, a vibration absorbing device 6 for absorbing vibration of the engine 2 is provided. In the example of FIG. 1, the vibration absorbing device 6 is provided on the transmission 3 side, but the scope of the present invention is not limited to this, and the vibration absorbing device 6 can also be provided on the engine 2 side. The vibration absorbing device 6 can also be provided in the housing of the transmission 3.

  FIG. 2 is a side sectional view for explaining the configuration of the vibration absorbing device 6. As shown in FIG. 2, the vibration absorbing device 6 includes a housing 8 that is fixed to a crankshaft 7 that transmits power (rotational driving force) of the engine 2 and rotates integrally with the crankshaft 7. The housing 8 is configured in a ring shape in a plan view when viewed from the axial direction of the crankshaft 7, the outer periphery thereof is horizontal along the axial direction of the crankshaft 7, and the housing cover and the axial end on the transmission side are integrated by welding. Thus, the fixing hole 41 having the inner diameter of the housing 8 is attached to the crankshaft 7 by a fastening member 42 such as a bolt (see FIGS. 2 and 6).

  As shown in FIG. 2, the housing 8 includes a center plate 9 provided in the center of the housing 8, and includes a housing plate 10 that covers both sides of the center plate 9 in the axial direction and the outer periphery. The center plate 9 is provided along a direction intersecting with the axial direction of the crankshaft 7 (vertical direction in FIG. 2). The center plate 9 can also be called a driven plate, and the housing plate 10 can also be called a drive plate.

  As shown in FIG. 2, the vibration absorber 6 accommodates two attenuators (oil damper 11 and pendulum damper 12) of different types in the housing. In this case, the oil damper 11 is disposed on the outer peripheral side (the radially outer side of the crankshaft 7), and the pendulum damper 12 is disposed on the inner peripheral side (the radially inner side of the crankshaft 7). In other words, the oil damper 11 is disposed on the outer side in the radial direction than the pendulum damper 12.

  The pendulum damper 12 includes a pair of mass bodies. The pair of mass bodies are arranged so as to sandwich the center plate 9 from both sides in the axial direction of the crankshaft 7 (left and right sides in FIG. 2). More specifically, the pair of mass bodies includes a first mass body 13 disposed on one side of the center plate 9 (for example, the right side in FIG. 2) and the other side of the center plate 9 (for example, FIG. 2 is provided on the left side in FIG. The first mass body 13 and the second mass body 14 are configured separately.

  The pendulum damper 12 includes a plurality of pairs of mass bodies (for example, 12 pairs in the example of FIG. 6). That is, a plurality of (for example, twelve) first mass bodies 13 are disposed on one side of the center plate 9, and a plurality of (for example, twelve) second masses are disposed on the other side of the center plate 9. A body 14 is arranged.

  The center plate 9 has a first restricting surface 15 that restricts the movement of the first mass body 13 toward the inner peripheral side (the radially inner side of the crankshaft 7), and from the restricting surface 15 to the radially outer side. The first side wall 160 that has a first side wall 160 that also functions as a side plate by restricting the movement of the first mass body 13 in the axial direction by abutting the end face of the first mass body 13 in the axial direction. The first regulating surface member 16 has a second regulating surface 17 that regulates the movement of the second mass body 14 toward the inner peripheral side (the radially inner side of the crankshaft 7), and the radial direction from the regulating surface 17. A press having a second side wall 180 that also functions as a side plate by restricting the movement of the second mass body 14 in the axial direction by abutting the axial end face of the second mass body 14 extending outward. Second regulation processed Member 18 is attached. The first restricting surface 15 is provided on the inner peripheral side (the radially inner side of the crankshaft 7) from the first mass body 13, and the second restricting surface 17 is provided on the inner periphery from the second mass body 14. It is provided on the side (inner radial direction of the crankshaft 7). The first regulating surface member 16 and the second regulating surface member 18 are positioned and fixed to the center plate 9 by fixing pins 19 and 20.

  The center plate 9 includes an annular first rolling surface member 22 having a first rolling surface 21 on which the first mass body 13 rolls on the outer peripheral side (radially outer side), and a second An annular second rolling surface member 24 having a second rolling surface 23 on which the mass body 14 rolls on the outer peripheral side (radially outer side) is attached. The first rolling surface 21 is provided on the outer peripheral side (the radially outer side of the crankshaft 7) from the first mass body 13, and the second rolling surface 23 is disposed on the outer periphery from the second mass body 14. It is provided on the side (outside in the radial direction of the crankshaft 7). The first rolling surface member 22 and the second rolling surface member 24 are positioned and fixed to the center plate 9 by fixing pins 19 and 20. The center plate 9 and the flywheel 40 sandwich the regulating surface members 16 and 18 from both sides in the axial direction of the center plate 9 by the fixing pin 20 that fixes the first regulating surface member 22 and the second regulating surface member 24. The flywheel 40 is fixed integrally and connected to the input shaft of the transmission 3 via a clutch (not shown). In the pendulum damper 12, the mass bodies 13, 14 simultaneously roll along the rolling surfaces 21, 23 in the radial direction and the circumferential direction so that vibration from the engine 2 is absorbed and then transmitted to the transmission side. It has become.

  FIG. 3 is an explanatory diagram of the center plate 9. As shown in FIG. 3, the center plate 9 is formed in a ring shape in a plan view when viewed from the axial direction of the crankshaft 7, and the hollow portion at the center of the centerplate 9 has the size of the outer diameter of the crankshaft 7. The corresponding diameter. FIG. 4 is an explanatory diagram of the regulating surface members (the first regulating surface member 16 and the second regulating surface member 18). As shown in FIG. 4, the restricting surface member is also configured in a ring shape in a plan view when viewed from the axial direction of the crankshaft 7, and the hollow portion at the center of the restricting surface member has the size of the outer diameter of the crankshaft 7. The corresponding diameter. Furthermore, FIG. 5 is explanatory drawing of a rolling surface member (the 1st rolling surface member 22, the 2nd rolling surface member 24). As shown in FIG. 5, the rolling surface member is also configured in a ring shape in a plan view when viewed from the axial direction of the crankshaft 7, and the hollow portion at the center of the rolling surface is large in the outer diameter of the crankshaft 7. The diameter corresponds to the height. Therefore, the center plate 9 and the crankshaft 7 do not interfere with the center plate 9 on the output side even when vibration is generated from the engine 2 on the input side.

  6 and 7 are explanatory views showing how the mass body is assembled. As shown in FIGS. 6 and 7, when assembling the mass bodies (the first mass body 13 and the second mass body 14), first, one side of the center plate 9 (for example, the right side in FIG. 6). ) A plurality of (for example, 12) first mass bodies 13 are arranged. Next, the first regulating surface member 16 is arranged on one side of the center plate 9 (for example, the right side in FIG. 6), and the inner peripheral side of the first mass body 13 (inner side in the radial direction of the crankshaft 7). The first restriction surface 15 is disposed on the surface. Further, the first rolling surface member 22 is arranged on one side of the center plate 9 (for example, the right side in FIG. 6), and on the outer peripheral side of the first mass body 13 (outside in the radial direction of the crankshaft 7). The first rolling surface 21 is disposed.

  Similarly, first, a plurality of (for example, twelve) second mass bodies 14 are arranged on the other side of the center plate 9 (for example, the left side in FIG. 6). Next, the second regulating surface member 18 is disposed on the other side of the center plate 9 (for example, the left side in FIG. 6), and the inner peripheral side of the second mass body 14 (inner side in the radial direction of the crankshaft 7). The second restriction surface 17 is disposed on the surface. In addition, the second rolling surface member 24 is disposed on the other side of the center plate 9 (for example, the left side in FIG. 6), and on the outer peripheral side of the second mass body 14 (outside in the radial direction of the crankshaft 7). A second rolling surface 23 is disposed.

  And, with the fixing pin 19, the first regulating surface member 16, the first rolling surface member 22, the second regulating surface member 18, and the second rolling surface member 24 are fixed to the center plate 9, and The first restricting surface member 16 and the second restricting surface member 18 are fixed to the center plate 9 with the fixing pin 20 (see FIG. 2). In this way, the assembly of the mass bodies (the first mass body 13 and the second mass body 14) is completed.

  According to the vibration absorbing device 6 of the embodiment of the present invention, a pair of mass bodies (first mass body 13 and second mass body 14) are separately disposed on both sides of the center plate 9, respectively. The In this case, it is not necessary to fix the first mass body 13 and the second mass body 14 to each other. Therefore, the mass bodies (the first mass body 13 and the second mass body 14) can be easily assembled as compared with the conventional case, and the assemblability is improved. Furthermore, it is possible to suppress the generation of abnormal noise due to the movement (sway) of the mass body in the axial direction with a relatively simple configuration as compared with the prior art. In addition, it is possible to reduce wear caused by movement (swing) of the mass body in the axial direction.

  In the present embodiment, a plurality of (for example, twelve) first mass bodies 13 and a plurality of (for example, twelve) second mass bodies 14 can be separately disposed on both sides of the center plate 9. In this case, it is not necessary to fix each of the plurality of first mass bodies 13 and each of the plurality of second mass bodies 14 to each other. Therefore, a plurality of mass bodies (the first mass body 13 and the second mass body 14) can be easily assembled as compared with the conventional case, and the assemblability is improved.

  In the present embodiment, the center plate 9 is provided with the first rolling surface 21 and the second rolling surface 23. The first mass body 13 and the second mass body 14 roll on the first rolling surface 21 and the second rolling surface 23, respectively, so that the vibration of the engine 2 can be absorbed.

  In the present embodiment, the center plate 9 is provided with a first restriction surface 15 and a second restriction surface 17. The movement of the first mass body 13 and the second mass body 14 to the inner peripheral side (in the radial direction of the power transmission shaft) can be regulated by the first regulating surface 15 and the second regulating surface 17. it can.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  As described above, the vibration absorber according to the present invention can improve the assemblability of the mass body, and has a relatively simple configuration, and the difference due to the movement (vibration) of the mass body in the axial direction. It has the effect of suppressing the generation of sound, and is useful as a vibration absorbing device that absorbs vibrations of an automobile engine.

1 Vehicle 2 Engine 3 Transmission 4 Differential Gear Device (Differential)
5 Wheel 6 Vibration Absorbing Device 7 Crankshaft 8 Housing 9 Center Plate (Driven Plate)
10 Housing plate (drive plate)
DESCRIPTION OF SYMBOLS 11 Oil type damper 12 Pendulum type damper 13 1st mass body 14 2nd mass body 15 1st control surface 16 1st control surface member 17 2nd control surface 18 2nd control surface member 19 Fixing pin 20 Fixing pin 21 First rolling surface 22 First rolling surface member 23 Second rolling surface 24 Second rolling surface member

Claims (4)

A vibration absorber for absorbing engine vibrations,
The vibration absorber is
A housing provided on a power transmission shaft for transmitting power of the engine;
A center plate provided inside the housing along a direction intersecting the axial direction of the power transmission shaft;
A pair of mass bodies arranged to sandwich the center plate from both axial sides of the power transmission shaft;
With
The pair of mass bodies is
A first mass disposed on one side of the center plate;
A second mass disposed on the other side of the center plate;
With
The vibration absorber according to claim 1, wherein the first mass body and the second mass body are configured separately. A plurality of the first mass bodies are arranged on one side of the center plate,
The vibration absorber according to claim 1, wherein a plurality of the second mass bodies are arranged on the other side of the center plate. In the center plate,
A first rolling surface member having a first rolling surface on which the first mass body rolls;
A second rolling surface member having a second rolling surface on which the second mass body rolls;
The vibration absorbing device according to claim 1, further comprising: In the center plate,
A first regulating surface member having a first regulating surface that regulates the movement of the first mass body toward the inner peripheral side;
A second restricting surface member having a second restricting surface for restricting movement of the second mass body toward the inner peripheral side;
The vibration absorbing device according to claim 1, further comprising:

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