JP4226464B2 - Flywheel equipment - Google Patents

Description

  The present invention includes a pair of holder plates that are coupled to a flywheel connected to a crankshaft and spaced apart in a direction along the axis of the flywheel, and are coupled to an output member and disposed between the two holder plates. A driven plate, a plurality of coil springs provided between the holder plates and the driven plates, and a first non-rotatably coupled to one of the holder plates so as to be in sliding contact with one surface of the driven plates. A first friction member, a second friction member that is slidably contacted with the other surface of the driven plate and is non-rotatably coupled to the other holder plate, and is interposed between the other holder plate and the second friction member. The present invention relates to a flywheel device including a disc spring to be mounted.

Such a flywheel device is already known from, for example, Patent Document 1 and the like, and the frictional force is generated by pressing both friction members rotating together with both holder plates against both surfaces of the driven plate by the spring force exerted by the disc spring. The rotational vibration caused by the coil spring is attenuated.
Japanese Patent Laid-Open No. 10-78045

  However, in the above-described conventional one, if an excessive load along the axial direction acts on the disc spring, the disc spring may be plastically deformed beyond the limit. In addition, there is a possibility that the assembling worker will assemble the disc spring regardless of the front and back, and the disc spring may be installed contrary to the setting.

  The present invention has been made in view of such circumstances, and prevents the disc spring from being plastically deformed beyond the limit, and allows the disc spring to be securely assembled in the correct direction. The purpose is to provide.

In order to achieve the above object, an invention according to claim 1 is characterized in that a pair of holder plates coupled to a flywheel connected to a crankshaft and spaced apart in a direction along the axis of the flywheel, and an output A driven plate coupled to a member and disposed between the holder plates, a plurality of coil springs provided between the holder plates and the driven plate, and the holders in sliding contact with one surface of the driven plate A first friction member coupled non-rotatably to one of the plates; a second friction member coupled non-rotatably to the other holder plate so as to be in sliding contact with the other surface of the driven plate; In a flywheel device comprising a disc spring interposed between the holder plate and the second friction member , The axially intermediate portion of the output member is cylindrical, is formed integrally flange portion allowed to bind the inner circumference of the driven plate as protruding radially outward, the second friction member, A cylindrical portion that coaxially surrounds the output member, and a radially outer side from the end of the cylindrical portion on the flange portion side so as to be in sliding contact with the inner peripheral portion of the other surface of the driven plate while facing the flange portion. And a flange portion projecting in the direction is formed of a synthetic resin, and the cylindrical portion and the flange portion are disposed between the cylindrical portion and the flange portion so as to be opposed to the inner surface of the disc spring. Rib-like restricting portions to be tied are integrally projected at a plurality of locations spaced in the circumferential direction of the second friction member, and the deflection of the disc spring can be restricted by the restricting portions. .

Further, the invention according to claim 2 is characterized in that, in addition to the configuration of the invention according to claim 1 , grease is filled between the both holder plates.

According to the present invention, since the restricting portion provided on the second friction member faces the inner surface of the disc spring, the disc spring becomes the restricting portion even if an excessive load along the axial direction acts on the disc spring. By abutting, it is possible to prevent the disc spring from being plastically deformed beyond the limit, and when assembling the disc spring, the disc spring must be installed unless the restricting portion is opposed to the inner surface of the disc spring. Therefore, the disc spring can be securely assembled in the correct direction.

Moreover, in the present invention, the restricting portion can be provided with a simple structure while avoiding an increase in the number of parts.

In particular , according to the second aspect of the present invention, it is possible to more effectively suppress the generation of vibration sound accompanying rotational vibration by the coil spring.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of a flywheel device shown in a state in which a half of one holder plate is cut away, and FIG. 3 is an enlarged view of a main part of FIG. 2, FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, and FIG. 5 is a sectional view taken along line 5-5 of FIG.

  First, in FIG. 1 and FIG. 2, this flywheel device transmits torque to a transmission in a state where torque fluctuation of the engine is reduced and torsional vibration is attenuated, and a drive plate 12 is connected to a crankshaft 11 of the engine. The flywheel 15 that is coaxially connected, the first and second holder plates 13 and 14 that are arranged at intervals in the direction along the axis of the flywheel 15 and are coupled to the flywheel 15, and the cylinder that is the output member A driven plate 17 coupled between the holder plates 13 and 14 coupled to the output hub 16 and first to fourth coil springs 18 provided between the holder plates 13 and 14 and the driven plate 17. .., 19... 20... 21 so as to be in sliding contact with the driven plate 17. A first friction member 22 that is coupled to the plate plate 13 so as not to be relatively rotatable; a second friction member 23 that is slidably contacted with the driven plate 17; A disc spring 24 interposed between the plate 14 and the second friction member 23.

  The drive plate 12 is formed in a disc shape with an opening at the center, and an inner peripheral portion thereof is coaxially coupled to the crankshaft 11 by a plurality of bolts 25. Further, on the outer periphery of the drive plate 12, a ring gear 26 to which power from a starter motor (not shown) is transmitted, and the flywheel 15 in which inner peripheral portions are fitted between the outer peripheral portions of the first and second holder plates 13 and 14. Are fastened by a plurality of bolts 27... And the outer peripheral portions of the first and second holder plates 13 and 14 and the flywheel 15 are coupled by a plurality of rivets 28. Further, first and second O-rings 29 and 30 interposed between the first and second holder plates 13 and 14 are mounted on both side surfaces of the flywheel 15.

  The first and second holder plates 13 and 14 are orthogonal to the one diameter line where the pair of first spring accommodating portions 31... Located on the one diameter line and the first spring accommodating portions 31. A pair of second spring accommodating portions 32, which are positioned on the other one diameter line, are provided so as to swell on opposite sides, and extend along the circumferential direction of the first and second holder plates 13, 14. The length of the first spring accommodating portions 31 is set larger than the length of the second spring accommodating portions 32 along the circumferential direction.

  Between the pair of first spring accommodating portions 31..., Coiled first and second coil springs 18, 19; 18, 19 are accommodated, respectively, and between the pair of second spring accommodating portions 32. The third and fourth coil springs 20, 21; 20, 21 that are coiled are accommodated, and the first to fourth coil springs 18 ..., 19 ..., 20 ..., 21 ... in a natural state. The second coil springs 19 are shorter than the first coil springs 18, the third coil springs 20 are shorter than the second coil springs 19, and the fourth coil springs 21 are the third coil springs 20. Shorter than ...

  When the crankshaft 11 is stationary, both ends of the first coil springs 18 are in contact with inner surfaces of both ends of the first spring accommodating portions 31 along the circumferential direction of the first and second holder plates 13 and 14. A space is provided between both ends of the second coil springs 19 disposed so as to be surrounded by the springs 18 and inner surfaces of both ends of the first spring accommodating portions 31 along the circumferential direction. Further, when the crankshaft 11 is stationary, both ends of the third coil springs 20 are in contact with inner surfaces of both ends of the second spring accommodating portions 32 along the circumferential direction of the first and second holder plates 13, 14. A space is provided between both ends of the fourth coil springs 21 arranged so as to be surrounded by the coil springs 20 and inner surfaces of both ends of the second spring accommodating portions 32 along the circumferential direction.

  An input shaft (not shown) of the transmission is coupled to the output hub 16 so as to be relatively non-rotatable by spline fitting. The output hub 16 has an axially intermediate portion extending outward in the half-open direction. A flange portion 16a is provided integrally, and the inner periphery of the driven plate 17 is welded to the flange portion 16a.

  The driven plate 17 has a pair of first and second coil springs 18, 19; a pair of first spring accommodating holes 33 for accommodating the pair of first and second coil springs 18, 19; 3 and the fourth coil springs 20, 21; a pair of second spring accommodating holes 34 for accommodating the 20, 21 are provided.

  Thus, when the circumferential relative positions of the first and second holder plates 13 and 14 and the driven plate 17 are not shifted, both ends of the first coil springs 18 are opposite to both ends of the first spring accommodating portions 31. In contact with the inner surface and in contact with both ends of the first spring accommodating holes 33 along the circumferential direction of the driven plate 17, both ends of the second coil springs 19 in this state are in the first direction along the circumferential direction of the driven plate 17. It exists in the position which has a space | interval between the both ends of the spring accommodation hole 33 .... The lengths of the second spring accommodating holes 34 along the circumferential direction of the driven plate 17 are set to be larger than the lengths of the first spring accommodating holes 33 along the circumferential direction, and the first and second holder plates 13 and 14 and the driven plate 17 are not displaced relative to each other in the circumferential direction, the both ends of the third coil springs 20 are in contact with the inner surfaces of both ends of the second spring accommodating portions 32. Are located at a distance from both ends of the second spring accommodating holes 34.

  The shape of the first and second spring accommodating portions 31 ..., 32 ..., the shape of the first and second spring accommodating holes 33 ..., 34 ..., and the first to fourth coil springs 18 ..., 19 ..., 20 When the relative rotation occurs between the first and second holder plates 13 and 14 and the driven plate 17 due to the setting of the lengths ..., 21 ..., the rotational power from the first and second holder plates 13 and 14 is As the rotational power increases, the first to fourth coil springs 18 ..., 19, ..., 20, ..., 21 ... are transmitted to the driven plate 17 while being compressed stepwise.

  Referring also to FIG. 3, the first friction member 22 includes a cylindrical portion 22a that coaxially surrounds the output hub 16, and a radially outward portion from the end of the cylindrical portion 22a on the flange portion 16a side of the output hub 16. The flange portion 22b is integrally formed with a flange portion 22b projecting from the flange portion 16b. The flange portion 22b is in sliding contact with the inner peripheral portion of the one surface 17a of the driven plate 17 while facing the flange portion 16a of the output hub 16. . In addition, fitting projections 22c are integrally projected at a plurality of locations spaced in the circumferential direction of the outer periphery of the cylindrical portion 22a, and these fitting projections 22c are formed in the first holder plate 13. The first friction member 22 is coupled to the first holder plate 13 in a relatively non-rotatable manner by fitting into the plurality of fitting recesses 13a provided around the circumference.

  4 and 5 together, the second friction member 23 includes a cylindrical portion 23a that coaxially surrounds the output hub 16, and an end portion of the cylindrical portion 23a on the flange portion 16a side of the output hub 16. A flange portion 23b that projects outward in the radial direction is integrally formed of synthetic resin, and the flange portion 23b is opposed to the flange portion 16a of the output hub 16 while being on the inner surface 17b of the driven plate 17. Touching the periphery. In addition, fitting projections 23c are integrally projected at a plurality of locations spaced in the circumferential direction of the outer periphery of the cylindrical portion 23a, and these fitting projections 23c are formed in the second holder plate 14. The second friction member 23 is coupled to the first holder plate 13 in a relatively non-rotatable manner by fitting into the plurality of fitting recesses 14a provided around the circumference.

  The disc spring 24 is interposed between the second holder plate 14 and the second friction member 23 so that the large-diameter end thereof is in contact with the flange portion 23b of the second friction member 23. 24, rib-like restricting portions 23d connecting the cylindrical portion 23a and the flange portion 23b so as to face the inner surface of 24 are integrated at a plurality of locations, for example, at four locations, spaced in the circumferential direction of the second friction member 23. Is projected. Further, through holes 23e and 23e are provided, for example, at two locations on the inner peripheral portion of the flange portion 23b.

  By the way, the grease 35 is filled between the first and second holder plates 13 and 14, and this grease 35 has a centrifugal force accompanying the rotation of the driven plate 17 and the first and second holder plates 13 and 14. The first and second O-rings 29 and 30 are interposed between the flywheel 15 and the outer peripheral portions of the first and second holder plates 13 and 14 by the action. Therefore, the grease 35 is not scattered from the flywheel device.

  Next, the operation of this embodiment will be described. Between the second holder plate 14 and the second friction member 23 that is coupled to the second holder plate 14 so as not to rotate relative to the other surface 17b of the driven plate 17, and the second holder plate 14. A disc spring 24 for generating a frictional force by pressing the first and second friction members 22, 23 against the driven plate 17 is interposed between the second friction member 23 and the disc spring 24. Are provided so as to be opposed to the inner surface of the disc spring 24.

  Therefore, even if an excessive load along the axial direction is applied to the disc spring 24, the disc spring 24 abuts against the restricting portion 23d, so that the disc spring 24 is prevented from being plastically deformed beyond the limit. Can do. Further, when the disc spring 24 is assembled, the disc spring 24 cannot be assembled unless the restricting portions 23d are opposed to the inner surface of the disc spring 24. Therefore, the disc spring 24 can be reliably assembled in the correct direction.

  By the way, a flange portion 16a for connecting the inner periphery of the driven plate 17 is integrally provided at an axially intermediate portion of the cylindrical output hub 16 so as to project outward in the radial direction. The cylindrical portion 23a that coaxially surrounds the output hub 16 and the end portion of the cylindrical portion 23a on the flange portion 16a side so as to be in sliding contact with the inner peripheral portion of the other surface 17b of the driven plate 17 while facing the flange portion 16a The cylindrical portion 23a and the cylindrical portion 23a are formed so as to be opposed to the inner surface of the disc spring 24, which is integrally formed with the flange portion 23b projecting outward in the radial direction from the base plate and is formed of synthetic resin. Rib-shaped restricting portions 23d that connect the flange portions 23b are integrally projected at a plurality of locations spaced in the circumferential direction of the second friction member 23. Therefore, the restricting portions 23d can be provided with a simple structure while avoiding an increase in the number of parts.

  Further, since the grease 35 is filled between the first and second holder plates 13 and 14, the generation of vibration sound due to the rotational vibration by the first to fourth coil springs 18, 19... 20, 21. It can be suppressed more effectively.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

It is a front view of a flywheel device shown in the state where a half part of one holder plate was notched. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Crankshafts 13 and 14 ... Holder plate 15 ... Flywheel 16 ... Output hub 16a as an output member ... Flange part 17 ... Driven plate 17a ... One side of driven plate 17b ... Other surfaces 18, 19, 20, 21 ... of the driven plate ... Coil springs 22 ... First friction member 23 ... Second friction member 23a ... Cylindrical portion 23b ... Eave portion 23d ... Regulator 24 ... Belleville spring 35 ... Grease

Claims (2)

A pair of holder plates (13, 14) coupled to a flywheel (15) connected to the crankshaft (11) and spaced apart in a direction along the axis of the flywheel (15), and an output member ( 16) a driven plate (17) coupled between the holder plates (13, 14) and a plurality of coils provided between the holder plates (13, 14) and the driven plate (17). A spring (18, 19, 20, 21) is coupled to one of the holder plates (13, 14) (13) in a non-rotatable manner so as to be in sliding contact with one surface (17a) of the driven plate (17). The first friction member (22) and the other holder plate (14) in sliding contact with the other surface (17a) of the driven plate (17). A flywheel device comprising a second friction member (23) coupled so as not to be relatively rotatable, and a disc spring (24) interposed between the other holder plate (14) and the second friction member (23). In
A flange portion (16a) for connecting the inner periphery of the driven plate (17) is integrally provided at an axially intermediate portion of the cylindrical output member (16) so as to project radially outward. ,
The second friction member (23) includes a cylindrical portion (23a) coaxially surrounding the output member (16) and the other surface (17b) of the driven plate (17) while facing the flange portion (16a). A flange portion (23b) projecting radially outward from an end portion of the cylindrical portion (23a) on the flange portion (16a) side so as to be in sliding contact with the inner peripheral portion of the cylindrical portion (23a) Formed,
A rib-shaped restricting portion (which connects the cylindrical portion (23a) and the flange portion (23b) so as to face the inner surface of the disc spring (24) that makes the large-diameter end abut against the flange portion (23b). 23d) are integrally projected at a plurality of locations spaced apart in the circumferential direction of the second friction member (23), and the deflection of the disc spring (24) can be regulated by the regulating part (23d) . A flywheel device characterized by that . The flywheel device according to claim 1, wherein between two holder plates (13, 14) grease (35) is characterized in that it is filled.

Images