JP5585360B2 - Fluid transmission device - Google Patents

Description

  The present invention relates to a fluid transmission device including a dynamic damper and a centrifugal pendulum vibration absorber.

  Conventionally, this type of fluid transmission device includes a pump impeller connected to an input member coupled to a prime mover, a turbine runner that can rotate together with the pump impeller, an input element, the input element, and a first elastic body. A damper mechanism having an intermediate element to be engaged, an output element that is engaged with the intermediate element via a second elastic body, and is coupled to the input shaft of the transmission, and the input member and the input element of the damper mechanism are engaged. A lockup clutch mechanism capable of executing lockup and releasing the lockup, a dynamic damper including an elastic body (coil spring) and a turbine runner engaged with the elastic body, a support member, and the support member And a centrifugal pendulum type vibration absorber including a plurality of mass bodies each capable of swinging are proposed (for example, References 1). In this fluid transmission device, a dynamic damper is formed by engaging the turbine runner and an intermediate element of the damper mechanism via an elastic body, and the support member of the centrifugal pendulum vibration absorber is substantially fixed to the turbine runner. Is done. The elastic body of the dynamic damper and the mass body of the centrifugal pendulum type vibration absorber overlap each other in the radial direction of the fluid transmission device when viewed from the axial direction of the fluid transmission device.

International Publication No. 2010/043194

  However, if the elastic body of the dynamic damper and the mass body of the centrifugal pendulum type vibration absorber are arranged so as to overlap in the radial direction when viewed from the axial direction as in the conventional fluid transmission device, the axial length of the fluid transmission device increases. Therefore, it becomes difficult to make the entire apparatus compact.

  In view of the above, the main object of the present invention is to provide a compact fluid transmission device capable of effectively attenuating vibration transmitted to an input member by a dynamic damper and a centrifugal pendulum type vibration absorber.

  The fluid transmission device of the present invention employs the following means in order to achieve the main object.

The fluid transmission device of the present invention is
A pump impeller connected to an input member coupled to a prime mover, a turbine runner rotatable with the pump impeller, a damper mechanism having an input element, an elastic body, and an output element, and the input member via the damper mechanism And a lockup clutch mechanism capable of releasing the lockup, and a dynamic damper including an elastic body and a mass body engaged with the elastic body, and a support A fluid transmission device comprising a member and a centrifugal pendulum-type vibration absorber including a plurality of mass bodies swingable with respect to the support member,
The elastic body of the dynamic damper and the centrifugal pendulum type vibration absorber overlap each other in the axial direction of the fluid transmission device as viewed from the radial direction of the fluid transmission device, and the turbine runner and the damper mechanism as viewed from the radial direction. It is arrange | positioned between.

  This fluid transmission device includes a dynamic damper and a centrifugal pendulum type vibration absorber in order to attenuate the vibration transmitted to the input member. In this fluid transmission device, the elastic body of the dynamic damper and the centrifugal pendulum type vibration absorber overlap the axial direction of the fluid transmission device as viewed from the radial direction of the fluid transmission device, and the turbine runner and the damper mechanism as viewed from the radial direction. It is arranged between. In this way, by arranging the elastic body of the dynamic damper and the centrifugal pendulum vibration absorber so as to overlap in the axial direction when viewed from the radial direction of the fluid transmission device, the axial length of the fluid transmission device is shortened and the entire device is compact. Can be In addition, the dynamic damper and the centrifugal pendulum vibration absorber are disposed between the turbine runner and the damper mechanism as viewed from the radial direction of the fluid transmission device, thereby suppressing an increase in the axial length of the fluid transmission device. The centrifugal pendulum vibration absorber can be easily connected to the damper mechanism. As a result, it is possible to realize a compact fluid transmission device that can effectively attenuate the vibration transmitted to the input member by the dynamic damper and the centrifugal pendulum vibration absorber.

  The elastic body of the dynamic damper may be disposed on the inner peripheral side of the centrifugal pendulum vibration absorber. Thereby, the arrangement space of the centrifugal pendulum vibration absorber can be sufficiently secured, and the degree of freedom in selecting the size (diameter length) of the mass body of the centrifugal pendulum vibration absorber can be increased.

  Furthermore, the mass body of the dynamic damper may be the turbine runner that engages with the elastic body of the dynamic damper. As a result, it is possible to configure a dynamic damper while reducing the number of parts while reducing the size of the entire fluid transmission device. If a turbine runner is used as the mass body of the dynamic damper, an elastic body and a turbine runner disposed between the turbine runner and the damper mechanism as viewed from the radial direction of the fluid transmission apparatus while suppressing an increase in the axial length of the fluid transmission apparatus. Can be easily engaged.

  Further, the damper mechanism includes a first elastic body that engages with the input element and a second elastic body that is spaced apart from the first elastic body in the radial direction and that engages with the output element. And having an intermediate element that engages with the first elastic body and the second elastic body, and the elastic body of the dynamic damper engages with the intermediate element of the damper mechanism. Alternatively, the support member of the centrifugal pendulum vibration absorber may be connected to the intermediate element of the damper mechanism. Thus, by connecting both the dynamic damper and the centrifugal pendulum type vibration absorber to the intermediate element of the damper mechanism, the element of the damper mechanism is interposed between the first elastic body and the second elastic body. It is possible to suppress the vibration of the damper element as a whole by suppressing the vibration of the intermediate element that vibrates most, and to suppress the resonance of the dynamic damper, that is, the vibration that occurs as the vibration is attenuated by the dynamic damper. it can. Furthermore, by connecting the dynamic damper to the intermediate element of the damper mechanism, the resonance point of the dynamic damper is shifted to the lower rotational speed side, so that the entire system comprising the damper mechanism, the dynamic damper, and the centrifugal pendulum type vibration absorber The convergence of vibration can be accelerated. Therefore, according to this configuration, the vibration transmitted to the input member can be effectively damped by the dynamic damper and the centrifugal pendulum vibration absorber.

  Furthermore, the support member of the centrifugal pendulum vibration absorber may be fixed to the intermediate element of the damper mechanism via a connecting member, and the elastic body of the dynamic damper is a member formed on the connecting member. You may engage with a joint part. As a result, it becomes possible to connect both the dynamic damper and the centrifugal pendulum type vibration absorber to the intermediate element of the damper mechanism using a single connecting member, so that the increase in the number of parts can be suppressed and the entire fluid transmission device Can be made more compact.

It is a lineblock diagram showing fluid transmission 1 concerning an example of the present invention. It is a block diagram which shows the centrifugal pendulum type vibration absorber 20 of the fluid transmission apparatus 1. FIG. 1 is a schematic configuration diagram of a fluid transmission device 1. FIG. It is explanatory drawing which illustrates the relationship between the rotation speed of the engine as a motor | power_engine, and the vibration level of the fluid transmission apparatus 1. FIG.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a schematic configuration diagram showing a fluid transmission device 1 according to an embodiment of the present invention. A fluid transmission device 1 shown in the figure is a torque converter mounted as a starting device on a vehicle including an engine (internal combustion engine) as a prime mover, and is a front cover (input member) connected to a crankshaft of the engine (not shown). 3, a pump impeller (input side fluid transmission element) 4 fixed to the front cover 3, a turbine runner (output side fluid transmission element) 5 that can rotate coaxially with the pump impeller 4, and a pump impeller 4 from the turbine runner 5. And a damper hub (output member) 7 fixed to an input shaft of a transmission which is an automatic transmission (AT) or a continuously variable transmission (CVT) (not shown). A damper mechanism 8 connected to the damper hub 7, and a lockup piston 90 connected to the damper mechanism 8. And a lock-up clutch mechanism 9 of the friction type.

  The pump impeller 4 includes a pump shell 40 that is tightly fixed to the front cover 3, and a plurality of pump blades 41 that are disposed on the inner surface of the pump shell 40. The turbine runner 5 includes a turbine shell 50 and a plurality of turbine blades 51 disposed on the inner surface of the turbine shell 50. The turbine shell 50 is fixed to the turbine hub 52 through rivets, and the turbine hub 52 is rotatably fitted to a hub support portion 7a formed at the left end (end portion on the transmission side) of the damper hub 7 in the figure. The The pump impeller 4 and the turbine runner 5 face each other, and a stator 6 that can rotate coaxially with the pump impeller 4 and the turbine runner 5 is disposed between the pump impeller 4 and the turbine runner 5. The stator 6 has a plurality of stator blades 60, and the rotation direction of the stator 6 is set in only one direction by the one-way clutch 61. The pump impeller 4, the turbine runner 5, and the stator 6 form a torus (annular flow path) for circulating hydraulic oil.

  The damper mechanism 8 includes a drive member 80 as an input element, an intermediate member (intermediate element) 83 engaged with the drive member 80 via a plurality of first coil springs (first elastic bodies) 81, and a first coil spring. A driven plate (output element) 84 that engages with the intermediate member 83 via a plurality of second coil springs (second elastic bodies) 82 that are spaced apart from 81 in the radial direction of the fluid transmission device 1. The drive member 80 is fixed to the lockup piston 90 of the lockup clutch mechanism 9 via a rivet, and is disposed in an outer peripheral region inside the housing defined by the front cover 3 and the pump shell 40 of the pump impeller 4. . Furthermore, the drive member 80 has a plurality of spring contact portions that contact one end of the corresponding first coil spring 81. The plurality of first coil springs 81 are slidably held at predetermined intervals in the circumferential direction by an outer peripheral portion of the lockup piston 90 and a support portion formed on the drive member 80. Each of the plurality of second coil springs 82 has higher rigidity (spring constant) than the first coil spring 81 and has a predetermined interval in the circumferential direction by the intermediate member 83 on the inner peripheral side of the first coil spring 81. And is slidably held in the chamber.

  The intermediate member 83 of the damper mechanism 8 includes an annular first intermediate plate 83a and an annular second intermediate plate 83b fixed to the first intermediate plate 83a via a rivet. The first intermediate plate 83a has a plurality of first spring contact portions that contact the other end of the corresponding first coil spring 81 on the outer peripheral side, and a plurality of second springs for holding the second coil spring 82. A spring support is provided on the inner peripheral side. The second intermediate plate 83b has a second spring support portion that holds the second coil spring 82 facing the second spring support portion of the first intermediate plate 83a. A plurality of spring contact portions that contact one end of the corresponding second coil spring 82 are formed on at least one of the first and second intermediate plates 83a and 83b. The driven plate 84 is disposed between the first intermediate plate 83 a and the second intermediate plate 83 b and is fixed to the damper hub 7. In the embodiment, the driven plate 84 is connected to the plate fixing portion 7b extending from the central portion in the axial direction of the damper hub 7 (the right side of the hub support portion 7a in the drawing) to the outside in the radial direction of the fluid transmission device 1 via a rivet. Fixed. Further, the driven plate 84 is formed with a centering portion 84a that contacts the inner periphery of the first intermediate plate 83a and aligns the intermediate member 83.

  The lockup clutch mechanism 9 is capable of executing lockup for connecting the front cover 3 and the damper hub 7 via the damper mechanism 8 and releasing the lockup. As shown in FIG. 1, the lock-up piston 90 of the lock-up clutch mechanism 9 is disposed inside the front cover 3 and in the vicinity of the inner wall surface of the front cover 3 on the engine side (right side in the drawing). And a piston support portion 7c formed on the damper hub 7 (right end in the figure) so as to be located on the opposite side of the hub support portion 7a. A friction material 91 is attached to the outer peripheral side of the lockup piston 90 and the surface on the front cover 3 side. And between the back surface (right side surface in the figure) of the lock-up piston 90 and the front cover 3, it is connected to a hydraulic control unit (not shown) via a hydraulic oil supply hole (not shown) and an oil passage formed in the input shaft. A lock-up chamber 95 is defined.

  When power is transmitted between the pump impeller 4 and the turbine runner 5 without performing lock-up by the lock-up clutch mechanism 9, the hydraulic oil supplied to the pump impeller 4 and the turbine runner 5 is supplied to the lock-up chamber 95. The lockup chamber 95 is filled with hydraulic oil. Accordingly, at this time, the lock-up piston 90 does not move to the front cover 3 side, and the lock-up piston 90 does not frictionally engage with the front cover 3. Further, when the pressure in the lockup chamber 95 is reduced by a hydraulic control unit (not shown), the lockup piston 90 moves toward the front cover 3 due to the pressure difference and frictionally engages with the front cover 3. As a result, the front cover 3 is connected to the damper hub 7 via the damper mechanism 8, whereby the power from the engine is transmitted to the input shaft of the transmission via the front cover 3, the damper mechanism 8 and the damper hub 7. Become. If the decompression in the lock-up chamber 95 is stopped, the lock-up piston 90 is separated from the front cover 3 due to a decrease in the pressure difference accompanying the inflow of hydraulic oil into the lock-up chamber 95, thereby releasing the lock-up. Will be.

  Here, in the fluid transmission device 1, if the lockup is executed when the engine speed connected to the front cover 3 reaches an extremely low lockup speed Nluup of about 1000 rpm, for example, the engine, the transmission, The power transmission efficiency between the two can be improved, and thereby the fuel consumption of the engine can be further improved. For this reason, the fluid transmission device 1 according to the embodiment has a damper hub (output) from the front cover (input member) 3 when the rotational speed (engine rotational speed) of the front cover 3 is in the vicinity of the lockup rotational speed Nlup determined to be extremely low. In order to satisfactorily dampen vibration generated between the members 7 and 7, a dynamic damper 10 composed of the turbine runner 5 and a plurality of coil springs (third elastic bodies) 100, a centrifugal pendulum vibration absorber 20, Is provided.

  As shown in FIG. 1, the plurality of coil springs 100 constituting the dynamic damper 10 are spaced apart from each other by a predetermined distance in the circumferential direction by a spring support member 11 fixed to a turbine hub 52 through a rivet together with a turbine shell 50. Each is held slidably and is disposed in an inner peripheral region between the turbine runner 5 and the damper mechanism 8 when viewed from the radial direction of the fluid transmission device 1. The spring support member 11 supports the first member 11 a that supports the turbine runner 5 side and outer peripheral portion of each coil spring 100, and the inner peripheral side portion of the side portion of each coil spring 100 on the damper mechanism 8 side. And a second member 11b having a plurality of spring contact portions that contact one end of the corresponding coil spring 100.

  The connecting member 24 is fixed to the above-described damper hub 7 together with the driven plate 84 of the damper mechanism 8 through a rivet. The connecting member 24 includes an annular portion 24a, a plurality of projecting pieces 24b having a substantially L-shaped cross section extending from the inner peripheral portion of the annular portion 24a in the axial direction and further to the inner peripheral side, A plurality of engaging portions 24c extending in the axial direction of the fluid transmission device 1 from the inner peripheral portion of the projecting piece 24b toward the coil spring 100 of the dynamic damper 10. As shown in FIG. 1, the other end of each coil spring 100 held by the spring support member 11 engages (contacts) with a corresponding engagement portion 24 c of the connecting member 24. That is, in the embodiment, the plurality of coil springs 100 constituting the dynamic damper 10 are engaged with the driven plate 84 and the damper hub 7 of the damper mechanism 8, respectively.

  As shown in FIG. 1, the centrifugal pendulum vibration absorber 20 includes an annular support member 21 connected to the damper mechanism 8 and a plurality of mass bodies 22 that can swing with respect to the support member 21. Including. As shown in FIG. 2, a plurality of guide holes 21a, which are arc-shaped long holes, are formed in the support member 21 of the embodiment at equal intervals. In addition, the mass body 22 of the embodiment is inserted into the two metal plates 22a formed in a disk shape and the guide holes 21a of the support member 21 so as to be freely rotatable, and the metal plates 22a are fixed to both ends. And a shaft 23. Furthermore, a plurality of (four in the embodiment) minute projections 22b are provided on the surface of each metal plate 22a facing the support member 21 in order to prevent the entire surface and the support member from slidingly contacting each other. It extends to the 21 side.

  The centrifugal pendulum vibration absorber 20 of the embodiment is fixed to the intermediate member 83 of the damper mechanism 8 via the connecting member 24 and is disposed on the outer peripheral side of each coil spring 100 that constitutes the dynamic damper 10. As shown in FIGS. 1 and 2, each protruding piece 24 b of the connecting member 24 is fixed to the inner peripheral portion of the support member 21 via a rivet between the guide holes 21 a adjacent to each other. As can be seen from FIG. 1, the annular portion 24 a of the connecting member 24 is provided with an intermediate member 83 (first and second intermediate plates 83 a, 83) via a rivet on the outer peripheral side of the second coil spring 82 of the damper mechanism 8. 83b). Thus, by engaging the engaging portion 24c of the connecting member 24 with the coil spring 100 of the dynamic damper 10, and fixing the projecting piece 24b of the connecting member 24 to the support member 21 of the centrifugal pendulum vibration absorber 20, Since it is possible to connect both the dynamic damper 10 and the centrifugal pendulum type vibration absorber 20 to the intermediate member 83 of the damper mechanism 8 using a single connecting member 24, the increase in the number of parts is suppressed and the fluid transmission device It becomes possible to make the whole 1 more compact. If the connecting member 24 is fixed to the intermediate member 83 on the outer peripheral side of the second coil spring 82 disposed on the inner peripheral side of the first and second coil springs 81 and 82 of the damper mechanism 8, the centrifugal pendulum The fluid transmission device 1 can be made compact by securing a sufficient space on the inner peripheral side of the vibration damper 20 and disposing the coil springs 100 of the dynamic damper 10 in this space.

  In the embodiment, the support member 21 and the connection member 24 are positioned when the centrifugal pendulum vibration absorber 20 in which the connection member 24 is fixed to the support member 21 is positioned with respect to the intermediate member 83 of the damper mechanism 8. The guide hole 21 a of the support member 21 and the rivet hole of the annular portion 24 a are formed so as to overlap in the radial direction when viewed from the axial direction of the fluid transmission device 1. That is, as shown in FIG. 2, the guide hole 21 a is an intermediate member of the connecting member 24 when viewed from the axial direction of the fluid transmission device 1 when the connecting member 24 is fixed to the support member 21 of the centrifugal pendulum vibration absorber 20. It is formed on the support member 21 so as to overlap the fixing portion for 83. Thus, when the centrifugal pendulum vibration absorber 20 is fixed to the intermediate member 83 of the damper mechanism 8 via the connecting member 24, the mass member 22 can be appropriately moved to guide the support member 21 of the centrifugal pendulum vibration absorber 20. Since the hole 21a can be used as a rivet caulking work opening, it is possible to reduce the number of work openings to be formed in the support member 21 or the like and to ensure good rigidity of the support member 21 or the like. Become.

  As described above, the plurality of coil springs 100 constituting the dynamic damper 10 according to the embodiment are arranged on the inner peripheral side of the centrifugal pendulum vibration absorber 20, and together with the centrifugal pendulum vibration absorber 20, from the radial direction of the fluid transmission device 1. Seen between the turbine runner 5 and the damper mechanism 8. As a result, the coil spring 100 of the dynamic damper 10 and the centrifugal pendulum-type vibration absorber 20 overlap in the axial direction as viewed from the radial direction of the fluid transmission device 1, so that the axial length of the fluid transmission device 1 is shortened and the entire device is compact. Can be realized. Further, by arranging the coil spring 100 of the dynamic damper 10 on the inner peripheral side of the centrifugal pendulum type vibration absorber 20, a sufficient space for arranging the centrifugal pendulum type vibration absorber 20 on the outer peripheral side is ensured, and the centrifugal pendulum type vibration absorber is obtained. The degree of freedom in selecting the size of the 20 mass bodies 22, particularly the length in the radial direction, can be increased. Further, by arranging the coil spring 100 of the dynamic damper 10 and the centrifugal pendulum type vibration absorber 20 between the turbine runner 5 and the damper mechanism 8 when viewed from the radial direction of the fluid transmission apparatus 1, the axial length of the fluid transmission apparatus 1 is increased. While suppressing the increase, it is possible to engage the coil spring 100 of the dynamic damper 10 with the intermediate member 83 of the damper mechanism 8 and connect the support member 21 of the centrifugal pendulum vibration absorber 20 to the intermediate member 83 of the damper mechanism 8. Become.

  Next, the operation of the above-described fluid transmission device 1 will be described with reference to FIG.

  As shown in FIG. 3, when the lockup is released when the front cover 3 and the damper hub 7 are not connected by the lockup clutch mechanism 9 via the damper mechanism 8, the power from the engine as the prime mover is converted from the front cover 3, the pump impeller 4, The turbine runner 5, the plurality of coil springs 100 and the connecting member 24, the intermediate member 83 of the damper mechanism 8, the second coil spring 82, the driven plate 84, and the damper hub 7 are transmitted to the input shaft of the transmission. become.

  Furthermore, in the fluid transmission device 1 of the embodiment, the support member 21 connected to the intermediate member 83 of the damper mechanism 8 via the connection member 24 when the lockup is released also rotates around the axis of the fluid transmission device 1 together with the intermediate member 83. As the support member 21 rotates, the support shaft 23 of each mass body 22 constituting the centrifugal pendulum type vibration absorber 20 is guided by the guide hole 21a of the support member 21, and the guide hole 21a has one end and the other end. Each mass body 22 swings with respect to the support member 21 by rolling between them. Thereby, the vibration transmitted from the centrifugal pendulum vibration absorber 20 to the front cover 3 by applying vibration having a phase opposite to the vibration (resonance) of the intermediate member 83 to the intermediate member 83 is centrifugal pendulum type. It can also be absorbed (attenuated) by the vibration absorber 20.

  On the other hand, at the time of lockup in which the front cover 3 and the damper hub 7 are coupled by the lockup clutch mechanism 9 via the damper mechanism 8, as shown in FIG. The transmission is transmitted to the input shaft of the transmission via the path of the up clutch mechanism 9, the drive member 80, the first coil spring 81, the intermediate member 83, the second coil spring 82, the driven plate 84, and the damper hub 7. At this time, fluctuations in torque input to the front cover 3 are mainly absorbed by the first and second coil springs 81 and 82 of the damper mechanism 8.

  In addition to such a damper mechanism 8, a plurality of coil springs 100 that engage with the turbine runner 5 and the intermediate member 83 of the damper mechanism 8 are connected to the front cover 3 (input member), the damper hub (output member) 7, at the time of lockup. The dynamic damper 10 is configured together with the turbine runner 5 and the spring support member 11 that do not contribute to torque transmission between the engine and the damper 10 and the vibration transmitted from the engine side to the front cover 3 by the dynamic damper 10. It is possible to effectively absorb (attenuate) the intermediate member 83. Furthermore, in the fluid transmission device 1 according to the embodiment, when the damper mechanism 8 connected to the front cover 3 by the lock-up piston 90 rotates together with the front cover 3 along with the lock-up, the damper mechanism 8 is connected to the intermediate member 83 of the damper mechanism 8. The support member 21 also rotates around the axis of the fluid transmission device 1 together with the intermediate member 83, and the support shaft 23 of each mass body 22 constituting the centrifugal pendulum type vibration absorber 20 is guided by the support member 21 as the support member 21 rotates. Each mass body 22 swings with respect to the support member 21 by being guided by the hole 21a and rolling between one end and the other end of the guide hole 21a. Thereby, the vibration transmitted from the centrifugal pendulum vibration absorber 20 to the front cover 3 by applying vibration having a phase opposite to the vibration (resonance) of the intermediate member 83 to the intermediate member 83 is centrifugal pendulum type. It can also be absorbed (attenuated) by the vibration absorber 20.

  Therefore, in the fluid transmission device 1 of the embodiment, the rigidity (spring constant) of the coil spring 100 that defines the vibration damping characteristics (resonance frequency) of the dynamic damper 10, the weight (inertia) of the turbine runner 5, etc., the centrifugal pendulum type vibration absorber The above-described lock-up rotation in which the number of cylinders of the engine as a prime mover and lock-up are executed based on the size (particularly radial length) and weight of the mass body 22 that defines the vibration damping characteristics of 20 and the shape and dimensions of the guide hole 21a. By adjusting based on the number Nlup, even when the lockup is executed when the engine speed is very low, for example, 1000 rpm, the engine is transmitted from the engine as the prime mover to the fluid transmission device 1, that is, the front cover 3. Is effectively absorbed (damped) by the dynamic damper 10 and the centrifugal pendulum vibration absorber 20. The vibration can be satisfactorily suppressed from being transmitted to the damper hub 7 via the driven plate 84 Te. According to the fluid transmission device 1, lockup is executed when the engine speed reaches a relatively low lockup speed Nluup, for example, about 1000 rpm, thereby improving power transmission efficiency and thus fuel efficiency of the engine. It becomes possible.

  FIG. 4 is an explanatory diagram illustrating the relationship between the rotational speed of the engine as the prime mover and the vibration level of the fluid transmission device 1 described above. This figure shows a plurality of torsional vibration systems obtained in order to obtain a fluid transmission device suitable for combination with a small cylinder (small cylinder) engine that generates relatively large vibrations such as 3 cylinders or 4 cylinders. The relationship between the rotation speed of the engine (front cover 3) in the fluid transmission device and the vibration level between the front cover 3 and the damper hub 7 of the fluid transmission device is illustrated. In this simulation, the specifications of the engine as the prime mover, the specifications of the pump impeller 4, the turbine runner 5, the damper mechanism 8, and the lockup clutch mechanism 9 are basically the same.

  In FIG. 4, the solid line indicates the vibration level of the fluid transmission device 1 according to the above embodiment, and the dotted line indicates the fluid transmission in which the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 are omitted from the fluid transmission device 1 of the above embodiment. Indicates the vibration level of the device. As can be seen from FIG. 4, in the fluid transmission device 1 in which the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 are connected to the intermediate member 83 of the damper mechanism 8, the first coil spring 81 and the second coil spring 82 are interposed. By being interposed, the vibration of the intermediate member 83 that vibrates most among the elements of the damper mechanism 8 can be suppressed, and the resonance of the entire damper mechanism 8 can be more effectively suppressed. Further, in the fluid transmission device 1, as shown in the figure, the resonance of the dynamic damper 10, that is, the vibration that occurs as the vibration is attenuated by the dynamic damper, is generated. The vibration (the peak of the waveform after the vibration attenuation) generated when the vibration is damped by the resonance, that is, the dynamic damper can be suppressed. Further, by connecting the dynamic damper 10 to the intermediate member 83 of the damper mechanism 8, the resonance point of the dynamic damper 10 is shifted to the lower rotational speed side, so that the distance between the front cover 3 and the damper hub 7, that is, the damper mechanism 8. The convergence of the vibration of the entire system including the dynamic damper 10 and the centrifugal pendulum type vibration absorber 20 can be accelerated. In addition, in the fluid transmission device 1 in which the dynamic damper 10 is connected to the intermediate member 83 of the damper mechanism 8, since the mass of the damper mechanism 8 is increased as a whole, the resonance frequency of the damper mechanism 8 is lowered and the damper mechanism 8 The resonance point is shifted to a lower rotational speed than the fluid transmission device without the dynamic damper 10, and the resonance point of the dynamic damper 10 can be moved away from the resonance point of the damper mechanism 8. Therefore, in the fluid transmission device 1 of the embodiment, the vibration transmitted from the engine to the front cover 3 in the region where the engine (front cover) rotation speed is low, that is, in the vicinity of the lockup rotation speed Nlup determined to be a lower value from the efficiency aspect. It can attenuate more effectively.

  As described above, the fluid transmission device 1 of the embodiment includes the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 in order to attenuate the vibration transmitted to the front cover 3 (input member). In the fluid transmission device 1, the coil spring 100 of the dynamic damper 10 and the centrifugal pendulum type vibration absorber 20 overlap in the axial direction of the fluid transmission device 1 as viewed from the radial direction of the fluid transmission device 1, and the turbine as viewed from the radial direction. Arranged between the runner 5 and the damper mechanism 8. Thus, the axial length of the fluid transmission device 1 is shortened by arranging the coil spring 100 of the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 so as to overlap in the axial direction when viewed from the radial direction of the fluid transmission device 1. The entire device can be made compact. Further, the axial length of the fluid transmission device 1 can be obtained by arranging the coil spring 100 of the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 between the turbine runner 5 and the damper mechanism 8 when viewed from the radial direction of the fluid transmission device 1. The dynamic damper 10 and the centrifugal pendulum vibration absorber 20 can be easily connected to the damper mechanism 8 while suppressing the increase. As a result, it is possible to realize a compact fluid transmission device 1 that can effectively attenuate the vibration transmitted to the front cover 3 (input member) by the dynamic damper 10 and the centrifugal pendulum vibration absorber 20.

  Further, the coil spring 100 of the dynamic damper 10 of the embodiment is disposed on the inner peripheral side of the centrifugal pendulum vibration absorber 20. Thereby, the arrangement space of the centrifugal pendulum vibration absorber 20 can be sufficiently secured, and the degree of freedom in selecting the size (radial length) of the mass body 22 of the centrifugal pendulum vibration absorber 20 can be increased.

  Further, by engaging the turbine runner 5 as a mass body with the coil spring 100 as in the above-described embodiment, the dynamic damper 10 is configured while suppressing the increase in the number of parts while reducing the size of the fluid transmission device 1 as a whole. It becomes possible. If the turbine runner 5 is used as the mass body 22 of the dynamic damper 10, it is disposed between the turbine runner 5 and the damper mechanism 8 as viewed from the radial direction of the fluid transmission apparatus 1 while suppressing an increase in the axial length of the fluid transmission apparatus 1. The coil spring 100 and the turbine runner 5 can be engaged with each other. However, it goes without saying that the present invention can be applied to a fluid transmission device including a dynamic damper using a member other than the turbine runner 5 as a mass body.

  In addition, the damper mechanism 8 of the embodiment is disposed in a radial direction away from the first coil spring 81 (first elastic body) that engages with the drive member 80 (input element) and the first coil spring 81. It has the 2nd coil spring 82 (2nd elastic body) engaged with the driven plate 84 (output element) as an elastic body, and has the intermediate member 83 engaged with the 1st coil spring 81 and the 2nd coil spring 82 The coil spring 100 of the dynamic damper 10 is engaged with the intermediate member 83 of the damper mechanism 8, and the support member 21 of the centrifugal pendulum vibration absorber 20 is connected to the intermediate member 83 of the damper mechanism 8. Thus, by connecting both the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 to the intermediate member 83 of the damper mechanism, the intermediate member 83 is interposed between the first coil spring 81 and the second coil spring 82. The vibration of the damper member 8 is suppressed more effectively by suppressing the vibration of the intermediate member 83 that vibrates most among the elements of the damper mechanism 8, and the vibration of the dynamic damper 10, that is, the vibration is attenuated by the dynamic damper 10. It is possible to suppress the vibration that occurs with this. Further, by connecting the dynamic damper 10 to the intermediate member 83 of the damper mechanism 8, the resonance point of the dynamic damper 10 is shifted to a lower rotational speed side, so that the damper mechanism 8, the dynamic damper 10, and the centrifugal pendulum type vibration absorber are used. The convergence of the vibration of the entire system including the device 20 can be accelerated. Therefore, according to this configuration, the vibration transmitted to the front cover 3 (input member) can be effectively damped by the dynamic damper 10 and the centrifugal pendulum vibration absorber 20.

  Further, the support member 21 of the centrifugal pendulum vibration absorber 20 is fixed to the intermediate member 83 of the damper mechanism 8 via the connecting member 24, and the coil spring 100 of the dynamic damper 10 is an engaging portion formed on the connecting member 24. 24c is engaged. As a result, it is possible to connect both the dynamic damper 10 and the centrifugal pendulum type vibration absorber 20 to the intermediate member 83 of the damper mechanism 8 using a single connecting member 24, thereby suppressing an increase in the number of parts. It becomes possible to make the whole of the fluid transmission device 1 more compact.

  In the above embodiment, both the dynamic damper 10 and the centrifugal pendulum type vibration absorber 20 are connected to the intermediate member 83 of the damper mechanism 8, but the dynamic damper 10 is attached to one of the intermediate member 83 and the driven plate 84 of the damper mechanism 8. The centrifugal pendulum vibration absorber 20 is connected to one of the intermediate member 83 and the driven plate 84, or the dynamic damper 10 and the centrifugal pendulum vibration absorber 20 are connected to the other of the intermediate member 83 and the driven plate 84 of the damper mechanism 8. It may be connected. Also with these configurations, the vibration transmitted to the front cover 3 can be effectively damped by the dynamic damper 10 and the centrifugal pendulum vibration absorber 20, and a fluid transmission device suitable for combination with a cylinder-saving engine can be obtained. Can be obtained.

  Moreover, although the fluid transmission apparatus 1 of the said Example is provided with the damper mechanism 8 which has multiple types of elastic bodies, ie, the 1st and 2nd coil springs 81 and 82, and the intermediate member 83, the fluid transmission apparatus of this invention May be provided with a damper mechanism having a plurality of types of elastic bodies but not having an intermediate member (intermediate element), or having a damper mechanism having only a single (one type) elastic body. There may be. Furthermore, although the fluid transmission apparatus 1 of the said Example is comprised as a torque converter provided with the pump impeller 4, the turbine runner 5, and the stator 6, the fluid transmission apparatus of this invention is comprised as a fluid coupling which does not have a stator. May be. Further, the fluid transmission device of the present invention may include a multi-plate friction type lock-up clutch mechanism instead of the single-plate friction type lock-up clutch mechanism 9. In addition, the configuration of the centrifugal pendulum vibration absorber in the present invention is not limited to the configuration of the centrifugal pendulum vibration absorber 20 described above.

  Here, the correspondence between the main elements of the above-described embodiment and the main elements of the invention described in the column of means for solving the problems will be described. That is, in the above embodiment, the front cover 3 connected to the engine as the prime mover corresponds to the “input member”, and the pump impeller 4 connected to the front cover 3 corresponds to the “pump impeller”. The rotatable turbine runner 5 corresponds to a “turbine runner”, and includes a drive member 80 as an input element, an intermediate member 83 engaged with the drive member 80 via a first coil spring 81, an intermediate member 83 and a second coil spring. A damper mechanism 8 having a driven plate 84 as an output element engaged through 82 corresponds to a “damper mechanism”, and a damper hub 7 connected to the front cover 3 and the input shaft of the transmission via the damper mechanism 8. A lock-up class that can perform lock-ups that link Hatch mechanism 9 corresponds to a “lock-up clutch mechanism”, and dynamic damper 10 constituted by coil spring 100 and turbine runner 5 as a mass body engaged with coil spring 100 corresponds to a “dynamic damper” and is supported. The centrifugal pendulum vibration absorber 20 including a plurality of mass bodies 22 that can swing relative to the member 21 and the support member 21 corresponds to a “centrifugal pendulum vibration absorber”.

  However, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the invention described in the column of means for solving the problem by the embodiment. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. In other words, the examples are merely specific examples of the invention described in the column of means for solving the problem, and the interpretation of the invention described in the column of means for solving the problem is It should be done based on the description.

  The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. Needless to say.

  The present invention can be used in the field of manufacturing fluid transmission devices.

  DESCRIPTION OF SYMBOLS 1 Fluid transmission device, 3 Front cover, 4 Pump impeller, 5 Turbine runner, 6 Stator, 7 Damper hub, 7a Hub support part, 7b Plate fixing part, 7c Piston support part, 8 damper mechanism, 9 Lock-up clutch mechanism, 10 dynamic Damper, 11 Spring support member, 11a First member, 11b Second member, 20 Centrifugal pendulum vibration absorber, 21 Support member, 21a Guide hole, 22 Mass body, 22a Metal plate, 22b Protrusion, 23 Support shaft, 24 Connecting member 24a annular part, 24b projecting piece, 24c engaging part, 40 pump shell, 41 pump blade, 50 turbine shell, 51 turbine blade, 52 turbine hub, 60 stator blade, 61 one-way clutch, 80 drive member, 81 1st coil spring, 82 2nd coil spring, 83 intermediate member, 83a 1st intermediate plate, 83b 2nd intermediate plate, 84 driven plate, 84a alignment part, 90 lockup piston, 91 friction material, 95 lockup chamber, 100 coil spring.

Claims (5)

A pump impeller connected to an input member coupled to a prime mover, a turbine runner rotatable with the pump impeller, a damper mechanism having an input element, an elastic body, and an output element, and the input member via the damper mechanism And a lockup clutch mechanism capable of releasing the lockup, and a dynamic damper including an elastic body and a mass body engaged with the elastic body, and a support A fluid transmission device comprising a member and a centrifugal pendulum-type vibration absorber including a plurality of mass bodies swingable with respect to the support member,
When the lockup is executed by the lockup clutch mechanism, the power from the prime mover is a path of the input member, the lockup clutch mechanism, the input element, the elastic body of the damper mechanism, and the output element. Is transmitted to the input shaft of the transmission via
When the lockup is executed by the lockup clutch mechanism, the elastic body and the mass body of the dynamic damper are not included in the path,
The elastic body of the dynamic damper and the centrifugal pendulum type vibration absorber overlap each other in the axial direction of the fluid transmission device as viewed from the radial direction of the fluid transmission device, and the turbine runner and the damper mechanism as viewed from the radial direction. A fluid transmission device characterized by being disposed between the two. The fluid transmission device according to claim 1,
The fluid transmission device according to claim 1, wherein the elastic body of the dynamic damper is disposed on an inner peripheral side of the centrifugal pendulum vibration absorber. The fluid transmission device according to claim 1 or 2,
The fluid transmission device according to claim 1, wherein the mass body of the dynamic damper is the turbine runner engaged with the elastic body of the dynamic damper. In the fluid transmission device according to any one of claims 1 to 3,
The damper mechanism includes a first elastic body that engages with the input element and a second elastic body that is spaced apart from the first elastic body in the radial direction and that engages with the output element as the elastic body. And having an intermediate element engaged with the first elastic body and the second elastic body,
The elastic body of the dynamic damper is engaged with one of the intermediate element and the output element of the damper mechanism, and the support member of the centrifugal pendulum vibration absorber is the intermediate element and the output element of the damper mechanism. a fluid transmission device according to claim Rukoto connected one or the other of the. The fluid transmission device according to claim 4,
The support member of the centrifugal pendulum vibration absorber is fixed to the intermediate element of the damper mechanism via a connecting member,
The fluid transmission device according to claim 1, wherein the elastic body of the dynamic damper is engaged with an engaging portion formed on the connecting member.

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