JP4832126B2 - Torque converter lockup damper device - Google Patents

Description

  The present invention relates to a lock-up damper device for a torque converter having a strength capable of withstanding a large impact torque.

  As is well known, a torque converter is a type of joint that can transmit engine power to a transmission using a working fluid as a medium. A pump impeller that is turned by the engine and a movement of the working fluid that is sent out by the rotation of the pump impeller. The turbine runner that rotates around the turbine runner, and the stator that changes the direction of the working fluid from the turbine runner and guides it to the pump impeller.

  Therefore, a plurality of blades are arranged at predetermined intervals at a predetermined angle on the pump impeller, turbine runner, and stator. The working fluid sealed in the torque converter is sent from the pump impeller through the blades in the outer circumferential direction, travels along the inner wall of the case of the torque converter, hits the blade of the turbine runner, and the turbine runner is the same as the pump impeller. It works to turn in the direction. Further, the working fluid sent out after hitting the turbine runner is changed in the flow direction so as to hit the blades of the stator and promote the rotation of the pump impeller, and flows into the pump impeller again from the inner periphery.

  FIG. 9 shows a cross section of a conventional torque converter. In the figure, (A) is a pump impeller, (B) is a turbine runner, (C) is a stator, and (D) is a piston, which are housed in a torque converter outer shell (M). Therefore, the front cover (e) rotates with the power from the engine, and the pump impeller (a) integrated with the front cover (e) rotates. ) Turns.

  A shaft (not shown) is fitted to the turbine hub (f) of the turbine runner (b), and the rotation of the turbine runner (b) can be transmitted to a transmission (not shown). Since the torque converter is a kind of fluid clutch, when the rotation speed of the pump impeller (a) is low, the rotation of the turbine runner (ro) can be stopped (the car can be stopped), but the pump As the rotational speed of the impeller (b) increases, the turbine runner (b) starts to rotate, and as the speed further increases, the speed of the turbine runner (b) approaches the rotational speed of the pump impeller (b). However, in the torque converter using the working fluid as a medium, the rotational speed of the turbine runner (b) cannot be the same as that of the pump impeller (b).

  Therefore, as shown in the figure, when the piston (d) is provided in the torque converter outer shell (mu), and the rotational speed of the turbine runner (b) exceeds a predetermined region, The piston (d) can be operated to move in the axial direction and engage with the front cover (e). Since a friction material (g) is attached to the outer periphery of the piston, the piston (d) can rotate at the same speed as the front cover (e) without slipping. This piston (d) is connected to the turbine runner (b), and the turbine runner (b) is rotated by the piston (d), and the power from the engine is lost to the transmission through the fluid. Can be transmitted with high efficiency of almost 100%.

  In this way, when the rotational speed of the turbine runner (b) increases and a certain condition is reached, the piston (d) engages with the front cover (e) and the turbine runner ( B) can be directly rotated. However, before the engagement, the rotational speeds of the turbine runner (B) and front cover (E) are not completely the same, and the piston (D) engages with the front cover (E). Will occur. Damper springs (H), (H) ... between the piston (D) and the turbine runner (B) in order to mitigate this impact at the time of engagement and, on the other hand, not transmit the torque fluctuation of the engine after the engagement. A lockup damper device (N) equipped with is attached.

  Therefore, when the piston (d) rotating at the same speed as the turbine runner (b) is engaged with the slightly faster front cover (e), the speed of the piston (d) increases momentarily and the turbine runner ( (B) Torque to rotate faster is applied. The damper springs (h), (h) are configured to absorb and absorb this shocking torque. The piston (d) is coaxially attached to the turbine hub (f) of the turbine runner (b), but it is positioned with the turbine runner (b) by the compression deformation of the damper springs (h), (h). It has a structure capable of producing a phase difference.

  FIG. 10 shows the lockup damper device (n) of the torque converter shown in FIG. 9 alone. The damper springs (H), (H) ... are sandwiched between A plate (le) and B plate (e), and a disk (wa) is placed between both A, B plates (le), (e). Intervene. The disc (wa) has a ring shape, and a plurality of accommodating spaces (f), (f),... Curved in an arc shape are provided on the outer periphery of the disc (wa) at equal intervals. The damper springs (H), (H),. Therefore, the part that divides each accommodation space (f), (f) ... becomes spring pressers (yo), (yo) ....

  The A plate (le) and the B plate (e) are provided with holding portions (re), (le),... Which are partially inflated, and the holding spaces (le), (le),. The damper springs (H), (H),... Are accommodated in the accommodation spaces (Ta), (T),. That is, the damper springs (H), (H),... Are received in the storage spaces (F), (F),. It is accommodated in (ta), (ta) ..., and is restrained by the holding portions (le), (le) ... so as not to be detached.

  Both A plate (le) and B plate (e) are connected by rivets (so), (so) ..., and the disk (wa) is sandwiched between A plate (le) and B plate (e) It can be rotated with. Notches are formed on the outer circumference of the disk (wa), and a piston (d) is engaged with the notches (tsu) and (tsu).

  Therefore, if the disk (wa) rotates with the piston (d) and the piston (d) engages with the front cover (e) to increase the rotational speed, the A plate (le) and B plate ( The damper springs (H), (H),... Sandwiched by (e) can be compressed and deformed to reduce the impact torque when engaged. The A plate (le) and B plate (e) sandwich damper springs (h), (h), and the B plate (e) is a turbine with a turbine runner (b) as shown in FIG. It is fixed to the hub (f).

  For this reason, the impact when the piston (d) engages with the front cover (e) is absorbed by the damper springs (h), (h), and so on and is not transmitted to the turbine runner (b). It consists of. In addition, when the impact torque is large, the above damper springs (H), (H) ... can not be absorbed alone, so the lockup damper device (N) has auxiliary damper springs (N), (N)・ ・ Is installed.

  The auxiliary damper springs (ne), (ne),... Are accommodated in an accommodating space formed in the A plate (le) and the B plate (e). Moreover, the holding space for the A plate (le) and B plate (e) is provided with holding parts (na), (na), etc., as in the case of the damper springs (h), (h),. It is restrained not to leave. As shown in FIG. 10, the accommodation space of the A plate (le) is open at one end of the auxiliary damper springs (ne), (ne), and the inner diameter side of the ring-shaped disc (wa). It is possible to compress and deform the auxiliary damper springs (ne), (ne),.

  The spring retainers (La), (La), etc. of the disc (wa) are bent at the base and located on the same surface as the A plate (Le), and when the lock-up damper device (N) is not operating As shown in FIG. 2, there is a space between the auxiliary damper spring (ne) and the spring retainer (la). By the way, if the damper springs (H), (H) ... are greatly compressed and deformed when the lock-up damper device (N) is operated, the spring retainer (La) hits the tip of the auxiliary damper spring (N). When pressed, the auxiliary damper spring (ne) is compressed and deformed. Furthermore, if the spring retainer (La) rotates, it stops against the entrance end face of the accommodation space. That is, this end surface functions as a stopper (mu), but is not sufficient in strength.

  The auxiliary damper spring (ne) is short and the spring wire is thick, which increases the spring constant, and when the spring retainer (La) compresses the auxiliary damper spring (ne), a large stress acts on the bottom of the accommodation space. However, shocking stress also acts on the base of the spring retainer (La). For this reason, there is a risk that the bottom of the housing space and the base of the spring retainer (la) may be deformed or sometimes damaged. On the other hand, the rivet (sole) for connecting and fixing the A plate (le) and the B plate (e) to each other is on the inner diameter side of the lockup damper device (nu), which is also the lockup damper device (nu). The strength is reduced.

  That is, since the A plate (le) and B plate (e) are fixed by riveting the inner diameter side of the damper springs (h), (h),..., The damper springs (h), (h)・ ・ Pushing outward by centrifugal force accompanying high-speed rotation causes a phenomenon that the outer peripheries of the A plate (le) and B plate (e) open to both sides.

  Thus, the conventional torque converter lock-up damper device has the above-described problems. The problems to be solved by the present invention are these problems, so that even if the auxiliary damper spring is deformed and the lockup damper device is activated, the base of the spring presser and the end face of the stopper are not deformed. Provided is a lockup damper device in which the overall strength is increased so that the outer peripheral portions of the plate and the B plate do not open to both sides.

  A lockup damper device for a torque converter according to the present invention includes a piston, a disk engaged with the piston, an A plate located on the piston side, a B plate located on the turbine side and attached to the turbine hub, and a plurality of dampers It consists of a spring and an auxiliary damper spring.

  By the way, in the present invention, the damper spring and the auxiliary damper spring are mounted on substantially the same radius and are sandwiched and accommodated in a holding portion formed by the A plate and the B plate that are connected and fixed to each other. The disk is sandwiched between the A and B plates, and a notch groove is formed on the outer periphery of the disk to engage with the piston and rotate together with the piston. Therefore, the disk rotates relative to the A and B plates. Is allowed.

  The disc is provided with an elongated hole serving as a receiving space on the same radius as the A and B plates, and both ends of the damper spring are received in contact with each other, and the auxiliary damper spring is not in contact with both ends at the position. A long hole is provided as a storage space. Therefore, if the disk rotates, the damper spring is compressed and deformed, and when the compression deformation of the damper spring becomes large, the end surface which is the edge of the elongated hole hits the tip of the auxiliary damper spring and is compressed.

  By the way, the A plate and the B plate which hold and hold the damper spring and the auxiliary damper spring while sandwiching the disk are connected and fixed to each other, but not on the inner diameter side but on the outer peripheral portion from the damper spring and the auxiliary damper spring. Riveted. However, since the outer periphery of the disk engaged with the outer periphery of the piston cannot be exceeded, a window is formed in the outer periphery of the disk, and the connecting portion provided for connecting and fixing the A plate and the B plate is the window portion. Is arranged.

  The size of the window is a size that can leave an appropriate space between the connecting portion, that is, a size that can stop by hitting the connecting portion when the auxiliary damper spring is compressed and deformed to some extent. Yes. The window functions as the final stopper of the lockup damper device. And the intensity | strength and rigidity of A-plate outer peripheral part become high by making this stopper part into a bag shape. On the other hand, the disc has uniform holes on the circumference.

  Since the lockup damper device according to the present invention includes a plurality of damper springs, when the piston engages with the front cover, the lockup damper device can compress and deform to suppress impact torque. Further, since the auxiliary damper spring is also provided, when the compression deformation of the damper spring increases, the auxiliary damper spring can compress and absorb a large impact torque, and the amount of compression deformation of the auxiliary damper spring becomes a predetermined amount. The stopper part is formed so that it stops when it exceeds the area.

  Such an effect is the same as that of the conventional lock-up damper device. However, in the present invention, the auxiliary damper spring is also accommodated and attached in the accommodating space formed by the holding portions provided on the A plate and the B plate. Since the side end face of the elongated hole of the disk that is sandwiched between the plates and hits is compressed, these portions that become the spring retainer and the spring receiver are not deformed or damaged. In addition, since both plates have a structure in which the outer periphery is connected and fixed by riveting, the fixing strength is increased. Therefore, even if a force that pushes the damper spring outward by the action of centrifugal force acts, the outer circumferences of both the A and B plays do not open to both sides.

Furthermore, when the auxiliary damper spring exceeds the compression range, the strength of the structure is such that the inner surface of the window formed on the outer periphery of the disk and the bag-shaped stopper formed on the A plate come into contact and stop. Get higher. That is, since the stopper portion of the A plate is formed in a bag shape, the strength and durability are improved, and the stopper portion does not deform when hit. Further, since the position of the stopper and the disk can be easily changed so as to avoid the stress concentration part, the strength and durability of the disk can be improved. Furthermore, since it plays the role of an oil sump by making it into a bag shape, it also becomes possible to suppress the abrasion of the stopper area | region of A plate and a disk.
On the other hand, in the lockup damper device of the present invention, it is possible to adjust the amount of compression deformation of the damper spring and the auxiliary damper spring by adjusting the size of the long hole formed in the disk, and setting of the required damper function Can be easily performed. Further, the disk is provided with a uniform hole on the circumference, but this hole makes the distortion caused by the heat treatment uniform and facilitates the repair of the subsequent process.

  FIG. 1 shows a cross section of a torque converter provided with a lockup damper device 1 of the present invention. The lockup damper device 1 connects the front cover 2 and the turbine runner 3, and functions to relieve impact torque when the piston 4 engages with the front cover 2. That is, the lock-up damper device 1 is attached to the turbine hub 6 together with the flange 5 of the turbine runner 3, and rotates with the piston 4 to generate shock torque generated when the piston 4 engages with the front cover 2. Can be compressed and deformed, and can absorb engine torque fluctuations during steady operation.

  The lock-up damper device 1 of FIG. 2 is in a state in which no piston is incorporated. FIG. 2A is a front view, FIG. 2B is a sectional view, 7 is a damper spring, 8 is an auxiliary damper spring, 9 Denotes an A plate located on the piston side, 10 denotes a B plate located on the turbine side, and 11 denotes a disk. The disk 11 forms a ring body having a hole in the center, and is engaged with the piston 4 through notched grooves 12, 12,.

  The four damper springs 7, 7,... And the two auxiliary damper springs 8, 8 are arranged on substantially the same radius and are in a position balanced with respect to the center. The damper springs 7, 7,... Are sandwiched and attached between the A plate 9 and the B plate 10, but the A plate 9 is formed with bag-shaped holding portions 13, 13,. The B-plate 10 is also formed with bag-shaped holding portions 14, 14..

  Each of these holding portions 13, 13,.., 14, 14, has windows 15, 15 ..., but the damper springs 7, 7 ... are not detached from the windows 15, 15 ... The damper spring 7 is housed in the housing space 16 formed by the holding portions 13 and 14 of the two plates. The disk 11 is sandwiched between the A plate 9 and the B plate 10, and the accommodating spaces 16, 16... Formed by the holding portions 13. Have. Therefore, the damper springs 7, 7,... Are fitted in the long holes 18, 18,... Provided in the disk 11, and are accommodated in the accommodation spaces 16, 16,. .

  Similarly, the auxiliary damper springs 8 and 8 are also fitted and attached to the accommodating spaces 17 and 17 constituted by the holding part formed in a bag shape by inflating the A plate 9 and the holding part formed in a bag shape by inflating the B plate 10. Yes. And the long hole 19 penetrating the disk 11 is located. However, the long hole 19 is longer than the length (circumferential length) of the auxiliary damper spring 8 fitted in the accommodation space 17, and a space is formed between the end surface 20 of the long hole 19 and the tip of the auxiliary damper spring 8. I'm leaving.

  The A plate 9 and the B plate 10 are connected and fixed to each other. In order to increase the connection / fixing strength, the rivets 21, 21,. As shown in FIG. 3, connecting portions 22, 22... Protrude outwardly on the outer periphery of the A plate 9, and the connecting portions 22, 22. .. extends through the B plate 10 side. .. Are connected and fixed to the outer peripheral portion of the B plate 10 shown in FIG. 5 via rivets 21, 21. FIG. 4 shows the disk 11 alone.

  Therefore, damper springs 7, 7,... Housed in housing spaces 16, 16,... Sandwiched between the holding parts 13, 13,. If the disk 11 rotates with the piston 4, the damper springs 7, 7,. However, the auxiliary damper springs 8 and 8 housed in the housing spaces 17 and 17 that are also sandwiched between the holding portions are not compressed and deformed. That is, a certain space remains between the end surfaces 20 and 20 of the elongated holes 19 and 19 at the tips of the auxiliary damper springs 8 and 8, and this end is eliminated, so that the end surfaces 20 and 20 are connected to the auxiliary damper springs 8 and 20. No compression deformation occurs until 8 is reached.

  FIG. 6 shows a case where the disk 11 is not twisted and rotated with respect to the A plate 9 and the B plate 10 connected and fixed to each other, and shows the same state as in FIG. In this case, the damper spring 7 is fitted and held in the accommodating space 16 of the holding portions 13 and 14, and both ends of the damper spring 7 are in contact with both ends of the holding portions 13 and 14. Similarly, both end surfaces of the long hole 18 formed in the disk 11 are in contact with both ends of the damper spring 7.

  One auxiliary damper spring 8 only fits into the accommodating space 17 formed by the holding portion, and the end surface 20 of the long hole 19 provided in the disk 11 does not hit the tip of the auxiliary damper spring 8. By the way, if the piston 4 is engaged with the front cover and the disk 11 is twisted and rotated clockwise, the damper spring 7 is compressed and deformed. However, the auxiliary damper spring 8 is not compressed and deformed. That is, it is not compressed until the end face 20 of the long hole 19 hits the auxiliary damper spring 8. FIG. 7 shows a case where the end face 20 hits the tip and is slightly compressed.

  FIG. 8 shows a case where the auxiliary damper spring 8 is compressed and deformed to the use limit. In this case, it comes into contact with the stopper portion 25 provided in the lockup damper device 1 and stops. In the lockup damper device 1 of the present invention, a connecting portion 22 for connecting the A plate 9 and the B plate 10 is disposed in a window 23 formed on the outer peripheral portion of the disk. When the stopper portion 25 provided on the inner diameter side of the connecting portion 22 hits the inner side surface 24 of the window 23, the torsional rotation of the disk 11 stops.

  In the present invention, the stopper portion 25 formed on the outer peripheral portion of the A plate 9 has a bag shape. By making the stopper portion 25 into a bag shape, it does not deform when the inner surface 24 of the window 23 hits. Further, since the position of the stopper portion 25 and the disk inner surface 24 can be easily changed so as to avoid the stress concentration portion, the strength and durability of the inner surface 24 are also improved. Further, by forming the bag-shaped stopper portion 25, the rigidity of the outer peripheral portions of the A and B plates connected and fixed to each other is greatly improved. And the lubricating oil accumulates in this bag, and there also exists an effect which prevents abrasion of a stopper area.

  On the other hand, the disc 11 shown in FIG. 4 is provided with a central hole, arc-shaped elongated holes 18, 18,..., And arc-shaped elongated holes 19, 19 provided therethrough, and an arc-shaped window 23, .. Are formed so as to penetrate therethrough and have notches 12, 12,. In addition to these, there are provided through holes 26a, 26a,..., 26b, 26b,. The disk 11 is subjected to heat treatment to increase the strength, but by forming these hollow holes 26a, 26a,..., 26b, 26b,. I can do it.

Torque converter with a lock-up damper device. The lockup damper device of the present invention. The lockup damper device according to the present invention with the piston removed. Specific example of A plate. Specific example of disc. Specific example of B plate. A lock-up damper device with zero torsional rotation of the disk. When the disc is twisted and the auxiliary damper spring is compressed. When the disk is twisted and rotated, the connecting part hits the inner surface of the window and stops. Conventional torque converter. Conventional lock-up damper device.

Explanation of symbols

1 Lock-up damper device 2 Front cover 3 Turbine runner 4 Piston 5 Flange 6 Turbine hub 7 Damper spring 8 Auxiliary damper spring 9 A plate
10 B plate
11 discs
12 Notch groove
13 Holding part
14 Holding part
15 windows
16 containment space
17 Containment space
18 Slotted hole
19 Slotted hole
20 End face
21 Rivet
22 Connecting part
23 Windows
24 Inside
25 Stopper section
26 Meat hole

Claims (3)

In a lockup damper device that is housed in a torque converter, elastically connects the turbine runner and the front cover, and absorbs torque fluctuations of the engine when the piston is engaged with the front cover, the lockup damper device is positioned on the piston side. A plate that engages with the outer periphery of the piston is sandwiched between the A plate and the B plate located on the turbine side, and a holding portion is formed on a predetermined radius between the A plate and the B plate to penetrate the disc. The damper spring fitted in the provided long hole is accommodated, and the auxiliary damper spring is fitted in the accommodating space of the holding portion formed on the A plate and the B plate, and the disk has a space between the end surface and the tip of the auxiliary damper spring. A large slot is provided, and an arc-shaped window is formed on the outer periphery of the disc, and The connecting portion for the door and B-plate coupling and fixed to each other and disposed in the window portion, the A-plate with bent connecting portion provided on the outer peripheral portion of the A-plate through the window, extends B plate side The connecting portion of the A plate and the connecting portion of the B plate are fixed to each other by a rivet, and the disk is greatly twisted and rotated, so that the compression deformation of the auxiliary damper spring reaches a predetermined size and is formed on the inner diameter side of the connecting portion of the A plate. The torque is characterized in that the length of the arcuate window is increased so that the stopper portion comes into contact with the inner surface of the window to form a predetermined space between the stopper portion and the stopper portion is formed in a bag shape. Converter lock-up damper device. The lockup damper device for a torque converter according to claim 1, wherein the damper spring and the auxiliary damper spring are arranged on the same radius. The lockup damper device for a torque converter according to claim 1 or 2, wherein the disk is provided with a through hole formed on a predetermined circumference.

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