JP2009115104A - Damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper device capable of damping torsional vibration of a rotary shaft and effectively utilizing energy of the torsional vibration. <P>SOLUTION: A damper device 40 includes a hub 41 externally fitted to an outer peripheral surface of an intermediary member 20b fixed to a crankshaft and a mass 42 fitted to an outer periphery of the hub 41 through the medium of an elastic member 43. The mass 42 is reciprocatably turned in the circumferential direction relative to the hub 41 in response to the deformation of the elastic member 43, thereby damping torsional vibration of the crankshaft. A lubricant is sucked through the increase in the volume of a pump chamber 50 incident to the turning of the mass 42 to one side in the circumferential direction relative to the hub 41, and, on the other hand, discharged through the decrease in the volume of the pump chamber 50 incident to the turning of the mass 42 to the other side in the circumferential direction relative to the hub 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a damper device that attenuates torsional vibration of a rotating shaft.

As such a damper device, for example, a device described in Patent Document 1 is known. Specifically, as shown in FIG. 4, the damper device 110 is externally fitted to the hub 111 via a hub 111 attached to the rotating shaft 120, an elastic member 112 made of rubber or the like, and the elastic member 112. The mass 113 is provided. Such a damper device 110 can attenuate torsional vibration of the rotating shaft 120 caused by a change in the rotating state of the rotating shaft 120 or the like. That is, when torsional vibration of the rotating shaft 120 occurs, the vibration energy of the rotating shaft 120 is absorbed by the mass 113 reciprocatingly rotating in the circumferential direction with respect to the hub 111 as the elastic member 112 is deformed. Torsional vibration of the rotating shaft 120 can be attenuated.
JP-A-8-210467

  By the way, when the torsional vibration of the rotating shaft 120 is attenuated by the damper device 40 in this way, the energy of the torsional vibration of the rotating shaft 120 is converted into the rotational energy of the mass 113 and finally the heat of the elastic member 112. It is converted into energy and is wasted.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a damper device that can attenuate torsional vibration of a rotating shaft and effectively use energy of the torsional vibration.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
The gist of the invention described in claim 1 is that the damper device that attenuates the torsional vibration of the rotating shaft functions as a pump by the energy of the torsional vibration of the rotating shaft.

  According to this configuration, fluid such as air and lubricating oil can be pumped using the energy of torsional vibration, and the torsional vibration energy can be effectively utilized while the torsional vibration of the rotating shaft is attenuated. It becomes like this.

  According to a second aspect of the present invention, in the damper device according to the first aspect, a hub that is attached to the rotary shaft and rotates integrally with the rotary shaft, a mass attached to the hub, the hub and the mass, An elastic member that transmits force between the mass, and the mass reciprocally rotates in the circumferential direction with respect to the hub as the elastic member is deformed, to attenuate the torsional vibration of the rotating shaft, The gist is to perform suction and discharge of fluid in association with the reciprocating rotation of the mass and the hub.

  According to the same configuration, the torsional vibration of the rotating shaft is attenuated by reciprocatingly rotating in the circumferential direction with respect to the hub, and the fluid is sucked and discharged along with the relative rotation of the mass and the hub. The damper device can function as a pump by the energy of torsional vibration of the rotating shaft.

  In addition, as a specific configuration of such a damper device, for example, as described in claim 3, a pump chamber whose volume changes as the mass rotates with respect to the hub is provided in at least one of the mass and the hub. The fluid is sucked in by increasing the volume of the pump chamber as the mass rotates in one circumferential direction with respect to the hub, while the mass is circumferential with respect to the hub. It is possible to adopt a configuration in which fluid is discharged by reducing the volume of the pump chamber as it rotates to the other side.

  According to a fourth aspect of the present invention, in the damper device according to the third aspect, an outflow restriction that restricts the flow of fluid from the pump chamber into the suction passage and the suction passage and the discharge passage connected to the pump chamber. The gist of the invention is that a mechanism and an inflow restricting mechanism for restricting the flow of fluid from the discharge passage into the pump chamber are provided.

  According to this configuration, when the volume of the pump chamber increases due to the mass turning in one of the circumferential directions with respect to the hub, the fluid flows into the pump chamber through the suction passage as the internal pressure of the pump chamber decreases. Inhaled. At this time, the inflow restricting mechanism restricts the fluid from flowing into the pump chamber through the discharge passage. Then, when the volume of the pump chamber decreases due to the mass turning to the other of the circumferential direction with respect to the hub, the fluid in the pump chamber is discharged through the discharge passage as the internal pressure of the pump chamber increases. At this time, the outflow restriction mechanism restricts the fluid in the pump chamber from flowing out of the pump chamber through the suction passage. In this way, when the mass reciprocates with respect to the hub, the fluid is sucked into the pump chamber through the suction passage and then discharged through the discharge passage.

  According to a fifth aspect of the present invention, in the damper device according to the fourth aspect, the rotating shaft is an output shaft of an internal combustion engine, and the suction passage is connected to a lubricating oil supply passage of the internal combustion engine. The gist is that the discharge passage is connected to a lubricating portion of the internal combustion engine.

  In a general internal combustion engine, an oil pump is driven through an engine output shaft, and the lubricating oil discharged thereby is supplied to each lubricating part of the engine through a lubricating oil passage. For this reason, a decrease in the output of the engine output shaft according to the drive of the oil pump is inevitable.

  According to the above configuration, the intake passage is connected to the lubricating oil passage of the internal combustion engine, and the discharge passage is connected to the lubricating portion of the engine, thereby utilizing the energy vibration of the torsional vibration of the output shaft of the internal combustion engine. Thus, the lubricating oil can be pumped to the lubricating portion, and the supply of the lubricating oil by the oil pump can be assisted. As a result, it is possible to suppress a decrease in the output of the engine output shaft corresponding to the drive amount of the oil pump.

  Hereinafter, an embodiment in which the present invention is applied to a damper device that attenuates torsional vibration of an output shaft of an in-vehicle multi-cylinder internal combustion engine will be described with reference to FIGS. 1 is a partial cross-sectional view showing the structure of the crankshaft and its damper device, and FIGS. 2 and 3 are cross-sectional views showing the cross-sectional structure taken along line 2-2 of FIG.

  As shown in FIGS. 1 and 2, the crankshaft 20 is provided with an oil pump 30 driven by the crankshaft 20 and a damper device 40 that attenuates torsional vibration of the shaft 20. The damper device 40 is configured as a so-called damper pulley in which the auxiliary belt 13 for transmitting the rotation of the crankshaft 20 to auxiliary devices such as a compressor and an alternator has a function as a damper on a pulley for winding the auxiliary belt 13. Yes.

  In the crankshaft 20, a journal 21 is rotatably supported by a bearing of a cylinder block, a large end portion of a connecting rod is attached to the crankpin 22, and the journal 21 and the crankpin 22 are connected by an arm 23.

  The oil pump 30 sucks up the lubricating oil in the oil pan 10 through the oil supply pipe 11 and then discharges it to form a lubricating oil supply passage 12 formed in the cylinder block and the crankshaft 20 (in FIG. 1, a part thereof). Supply to each lubricating part of the internal combustion engine. For this reason, the output of the crankshaft 20 is reduced by the amount of driving of the oil pump 30.

  The damper device 40 is connected to the distal end portion 20a of the crankshaft 20 and rotates as a part of the shaft 20, an intermediate member 20b, a substantially disc-shaped hub 41 fitted on the outer periphery of the intermediate member 20b, An elastic member 43 attached to the outer periphery of the hub 41 and a substantially annular mass 42 attached to the outer periphery of the elastic member 43 are configured. Further, the auxiliary machine belt 13 is wound around the mass 42.

  When the crankshaft 20 rotates with the operation of the internal combustion engine, the rotational force of the shaft 20 is transmitted to the accessory belt 13 by the damper device 40, thereby driving each accessory. Further, when torsional vibration is generated in the crankshaft 20 due to a change in the rotational state of the auxiliary belt 13 or the crankshaft 20, the mass 42 reciprocates in the circumferential direction with respect to the hub 41 as the elastic member 43 is deformed. By rotating, the vibration energy of the crankshaft 20 is absorbed and the torsional vibration of the crankshaft 20 is attenuated.

  Here, the damper device 40 according to the present embodiment is configured to function as a pump by the energy of the torsional vibration of the crankshaft 20 by adopting the configuration described below, whereby the oil pump 30 can assist the supply of lubricating oil.

  That is, two grooves 42 a extending in the circumferential direction are formed on the inner peripheral surface of the mass 42 so as to be symmetric with respect to the axis L of the crankshaft 20. Further, two plate-like partition members 44 projecting toward the mass 42 are fixed to the outer periphery of the hub 41. The partition member 44 extends from the hub 41 to the inner peripheral surface of the groove 42a, and the tip of the partition member 44 slides on the inner peripheral surface as the hub 41 and the mass 42 rotate relative to each other. The two pump chambers 50 are respectively formed by the inner peripheral surface of the groove 42a, the outer peripheral surface of the elastic member 43, and the partition member 44.

  In addition, an annular inner oil passage 51 extending in the axial direction and an annular outer oil passage 52 extending in the axial direction in a form surrounding the inner oil passage 51 are formed in the mediating member 20b. The hub 41 and the elastic member 43 are formed with two suction passages 53 that communicate the pump chamber 50 and the inner oil passage 51 and two discharge passages 54 that communicate the pump chamber 50 and the outer oil passage 52. Yes. The suction passage 53 and the discharge passage 54 have different positions in the axial direction of the crankshaft 20, and the discharge passage 54 is formed closer to the oil pump 30 than the suction passage 53 in the axial direction of the crankshaft 20. ing. The suction passage 53 is provided with an outflow regulating valve 61 that restricts the lubricating oil from flowing into the suction passage 53 from the pump chamber 50, that is, the backflow of the lubricating oil sucked into the pump chamber 50 back into the suction passage 53. Yes. The discharge passage 54 is provided with an inflow restriction valve 62 that restricts the lubricating oil from flowing into the pump chamber 50 from the discharge passage 54, that is, the backflow of the lubricating oil pushed out into the discharge passage 54 into the pump chamber 50. .

  Further, the crankshaft 20 is a passage that connects the lubricating oil supply passage 12 and the inner oil passage 51, a connection passage 55 that supplies the lubricating oil circulated in the internal combustion engine to the damper device 40, and an outer oil passage 52. And a connection passage 56 for connecting the lubricating oil discharged from the damper device 40 to the crankpin 22, which is a passage connecting the oil supply port 22 a formed on the outer peripheral surface of the crankpin 22.

Next, the operation | movement aspect of the damper apparatus 40 by such a structure is demonstrated.
When the mass 42 rotates in the circumferential direction W1 shown in FIG. 2 with respect to the hub 41, the inner wall of the groove 42a rotates to the position shown by the broken line in FIG. As a result, the volume of the pump chamber 50 increases and its internal pressure decreases. As a result, the lubricating oil in the lubricating oil supply passage 12 flows through the connecting passage 55, the inner oil passage 51, and the suction passage 53 in this order along the direction indicated by the arrow K in FIGS. Is done. At this time, the inflow restriction valve 62 restricts the inflow of lubricating oil from the discharge passage 54 to the pump chamber 50.

  On the other hand, when the mass 42 rotates in the circumferential direction W2 shown in FIG. 3 with respect to the hub 41, the inner wall of the groove 42a is located at the position shown by the broken line in FIG. 3 with respect to the partition member 44 fixed to the hub 41. As a result, the volume of the pump chamber 50 decreases and the internal pressure increases. Thus, the lubricating oil sucked into the pump chamber 50 flows in the order of the discharge passage 54, the outer oil passage 52, the connection passage 56, and the oil supply port 22a along the direction indicated by the arrow T in FIGS. And supplied to the engaging portion between the crank pin 22 and the large end of the connecting rod. At this time, the outflow restriction valve 61 restricts the outflow of lubricating oil from the pump chamber 50 to the suction passage 53.

  In this manner, the mass 42 reciprocally rotates between the circumferential direction W1 and the circumferential direction W2 with respect to the hub 41, so that the lubricating oil in the lubricating oil supply passage 12 is larger than the crank pin 22 and the connecting rod. It is supplied to the engaging part with the end part.

According to the embodiment described above, the following effects can be obtained.
(1) Using the energy of torsional vibration of the crankshaft 20, the lubricating oil in the lubricating oil supply passage 12 is supplied to the engaging portion between the crankpin 22 and the large end of the connecting rod. Thereby, supply of the lubricating oil by the oil pump 30 can be assisted, and the torsional vibration of the crankshaft 20 can be damped and the energy of the torsional vibration can be used effectively.

  (2) Further, by assisting the supply of the lubricating oil by the oil pump 30, the required supply pressure of the oil pump 30 can be reduced, and the crankshaft 20 that is consumed to drive the oil pump 30 can be reduced. While reducing an output, size reduction of the oil pump 30 can be achieved.

(Modification)
In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
In the above-described embodiment, a structure in which two pump chambers 50 are formed is adopted, but not limited to this, a structure in which only one pump chamber is formed or a structure in which three or more pump chambers are formed. It can also be adopted. In addition, the supply pressure and supply amount of the lubricating oil by the damper device 40 increase as the number of pump chambers increases.

  In the above embodiment, the supply of lubricating oil by the oil pump 30 is assisted. However, for example, when a sufficient supply amount of lubricating oil can be obtained only by the pump function of the damper device 40, the oil pump 30 is turned off. It can be omitted. Incidentally, as a method for increasing the supply pressure and supply amount of the lubricating oil by the damper device 40, for example, the diameter of the hub 41 and the mass of the mass 42 are increased.

  In the above embodiment, a structure is adopted in which the groove 42a is formed on the inner peripheral surface of the mass 42 and the partition member 44 protruding to the groove 42a is fixed to the outer peripheral surface of the hub 41. On the other hand, a structure in which a groove is formed on the outer peripheral surface of the hub 41 and a partition member protruding from the groove is fixed to the inner peripheral surface of the mass 42 may be employed. Further, a structure in which grooves are formed in portions corresponding to each other on both the outer peripheral surface of the hub 41 and the inner peripheral surface of the mass 42 may be employed.

  In the above embodiment, the case where the present invention is applied to the damper device that transmits the rotational force of the crankshaft 20 to the auxiliary machine of the internal combustion engine through the auxiliary machine belt 13 is illustrated. Even in a damper device that does not transmit force to another rotating body, the present invention can be applied in basically the same manner.

  In the above embodiment, the case where the present invention is applied to the damper pulley of the crankshaft 20 in which the mass 42 is fitted to the outer periphery of the hub 41 via the elastic member 43 made of rubber is illustrated. For example, the present invention can be applied to a damper device in which a mass is mounted on a side surface of a hub via a spring, in basically the same manner. In addition, the present invention can be applied not only to a crankshaft of an internal combustion engine but also to a damper device provided on another rotating shaft such as an output shaft of an electric motor. In short, the present invention can be applied to any damper device that attenuates the torsional vibration of the rotating shaft by the relative rotation of the mass and the hub.

Sectional drawing which shows the cross-section of the apparatus along the axial direction of the crankshaft which is a rotating shaft about one Embodiment concerning the damper apparatus of this invention. Sectional drawing which shows the cross-sectional structure which follows the 2-2 line | wire of FIG. 1 about the damper apparatus of the embodiment. FIG. 3 is a cross-sectional view showing a cross-sectional structure of the damper device of the same embodiment, taken along line 2-2 in FIG. 1, in a state where the rotational phase of the mass relative to the hub is different from that in FIG. 2. Sectional drawing which shows the cross-sectional structure about the conventional damper apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Oil pan, 11 ... Oil supply pipe, 12 ... Lubricating oil supply path, 13 ... Auxiliary machine belt, 20 ... Crankshaft, 20a ... Tip part, 20b ... Intermediary member, 21 ... Journal, 22 ... Crankpin, 22a ... Oil port, 21 ... journal, 22 ... crank pin, 22a ... oil supply port, 23 ... arm, 30 ... oil pump, 40 ... damper device, 41 ... hub, 42 ... mass, 42a ... groove, 43 ... elastic member, 44 ... partition member, 50 ... pump chamber, 51 ... inner oil passage, 52 ... outer oil passage, 53 ... suction passage, 54 ... discharge passage, 55 ... connection passage, 56 ... connection passage, 61 ... outflow regulating valve, 62 ... inflow Restriction valve, 110 ... damper device, 111 ... hub, 112 ... elastic member, 113 ... mass, 120 ... rotating shaft.

Claims (5)

In the damper device that attenuates the torsional vibration of the rotating shaft,
The damper device functions as a pump by the energy of torsional vibration of the rotating shaft. The damper device according to claim 1,
A hub mounted on the rotating shaft and rotating integrally with the rotating shaft; a mass mounted on the hub; and an elastic member that transmits force between the hub and the mass, the mass being the elastic member Attenuating torsional vibration of the rotating shaft by reciprocatingly rotating in the circumferential direction with respect to the hub in accordance with deformation of the hub, and sucking and discharging fluid with the reciprocating rotation of the mass and the hub. A damper device characterized by performing. The damper device according to claim 2, wherein
A pump chamber whose volume changes with the rotation of the mass with respect to the hub is provided in at least one of the mass and the hub, and the mass is rotated in one of the circumferential directions with respect to the hub. Fluid is sucked in by increasing the volume of the pump chamber, while fluid is discharged by decreasing the volume of the pump chamber as the mass rotates in the other circumferential direction with respect to the hub. A damper device. The damper device according to claim 3, wherein
An intake passage and a discharge passage connected to the pump chamber; an outflow restricting mechanism that restricts fluid from flowing from the pump chamber into the suction passage; and an inflow that restricts fluid from flowing from the discharge passage into the pump chamber. A damper device comprising a restriction mechanism. The damper device according to claim 4, wherein
The rotating shaft is an output shaft of the internal combustion engine, the suction passage is connected to a lubricating oil supply passage of the internal combustion engine, and the discharge passage is connected to a lubricating portion of the internal combustion engine. A damper device.

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