JP5342320B2 - Mounting structure of damper device - Google Patents

Description

The present invention relates to a mounting structure for a damper device used in a torque converter, a fluid coupling, a starting device and the like.

    Today, torque converters are mounted on most vehicles, and as is well known, torque converters are a type of joint that can transmit engine power to a transmission using working fluid as a medium. An impeller, a turbine runner that rotates around the movement of the working fluid sent out by the rotation of the pump impeller, and a stator that changes the direction of the working fluid that comes out of 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 flow direction so as to encourage rotation of the pump impeller by hitting the blades of the stator, and flows into the pump impeller again from the inner periphery.

  FIG. 5 shows a cross section of a conventional torque converter. In the figure, (A) shows a pump impeller, (B) shows a turbine runner, (C) shows a stator, and (H) shows a piston, which are housed in a torque converter outer shell (E). Therefore, the front cover (f) is rotated by obtaining power from the engine, and the pump impeller (a) integrated with the front cover (f) is rotated. As a result, the turbine runner (robot) is mediated by the working fluid. ) Turns.

  A shaft (not shown) is fitted to the turbine hub (g) 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, the turbine runner (b) starts to rotate as the rotational speed of the pump impeller (b) increases, and the speed of the turbine runner (b) increases as the speed increases. ) Approaches the rotation speed. 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 torque converter outer shell (e) is provided with a piston (h) and the rotational speed of the turbine runner (b) exceeds a predetermined region, The piston (h) can be operated to move in the axial direction and engage with the front cover (f). Since a friction material (re) is attached to the outer periphery of the piston, the piston (h) can rotate at the same speed as the front cover (f) without slipping. And this piston (chi) is connected with the turbine runner (b), and the turbine runner (b) is rotated by the piston (chi), and the power loss from the engine is transmitted 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 (h) engages with the front cover (f), and the turbine runner ( B) can be directly rotated. However, before the engagement, the rotational speeds of the turbine runner (b) and front cover (f) are not exactly the same, and the piston (h) engages the front cover (f), resulting in impact torque based on the speed difference. Will occur. In order to alleviate the impact at the time of engagement, and on the other hand, to reduce the torque fluctuation of the engine after engagement (lock-up state), a damper spring (nu), between the piston (chi) and the turbine runner (ro), A damper device (d) provided with (nu) is attached.

  Therefore, when the piston (chi) rotating at the same speed as the turbine runner (b) is engaged with the slightly faster front cover (f), the speed of the piston (chi) increases instantaneously and the turbine runner ( B) Torque to rotate faster is applied. The damper springs (nu), (nu)... Are configured to absorb and absorb this shocking torque. The piston (H) is coaxially attached to the turbine hub (G) of the turbine runner (B). The turbine runner (B) is compressed by the damper springs And a phase angle difference can be generated.

By the way, as shown in FIG. 6, a plan view including a partial cross section of the damper device (d) includes a central disk (wa) on the input side sandwiched between both side plates (le) and (le) on the output side. .. The above-described damper springs (nu), (nu),... Are accommodated by forming accommodation spaces (ta), (ta). The damper springs (nu), (nu)... Housed in the housing spaces (ta), (ta)... Rotate faster than the center disk (wa). Thus, one side plate (le) is connected and fixed to the turbine hub (g) together with the turbine runner (b).

For this purpose, an attachment portion (e) fixed to the turbine hub (g) is provided on the inner peripheral side of the side plate (le). On the outer periphery of the central disk (wa), there are provided engaging grooves (tsu), (tsu) for engaging the piston (chi), and the torque input from the piston (chi) is a damper spring (nu). ), (Nu)... Are transmitted to the side plates (le), (le), and from one side plate (le) to the turbine hub (g), and the shaft hole of the turbine hub (g) It is transmitted to the output shaft that fits in.

  The damper springs (nu), (nu)... Are accommodated in the accommodating spaces (ta), (ta)... Formed on both side plates (le), (le) that are riveted to each other, and 2 One set of books in series. In addition, auxiliary damper springs (ne), (ne),... Are fitted in elongated holes formed in the outer peripheral portion of the central disk (wa), and are sandwiched between both side plates (le), (le). . The auxiliary damper springs (ne), (ne),... Function when an extremely large impact torque that cannot be absorbed by the compression deformation of the damper springs (nu), (nu),.

Therefore, if the damper springs (nu), (nu) ... are greatly compressed and deformed, and the central disk (wa) rotates, both plates (le), le The auxiliary damper springs (ne), (ne),... Move along the formed accommodation space and hit the receiving surface at the tip of the accommodation space. Further, when an extremely large impact torque is generated that cannot be absorbed even by the compression deformation of the auxiliary damper springs (ne), (ne),..., The stopper works.

  By the way, a pair of two damper springs (nu), which are accommodated in the accommodation space (t) in series, are separated from each other by a separator (n) protruding outward from the intermediate member (la). The intermediate member (la) is supported by a bearing (f) formed on the outer periphery of the turbine hub. Therefore, in order to uniformly expand and contract the damper springs (nu) and (nu) in series, the damper springs (nu) and (nu) can be rotated together with expansion and contraction. Of course, in addition to the rotation accompanying the expansion and contraction of the damper springs (N), (N), the intermediate member (La) rotates at a high speed along with the rotation of the torque converter. ), (Na)... Are pulled outward by centrifugal force, and the intermediate member (La) is distorted. As a result, the damper springs (nu) and (nu) in series cannot be correctly supported, and the damper springs (nu) and (nu) buckle and interfere with the side plates (le) and (le). .

  FIG. 7 schematically shows the case where the intermediate member (La) is distorted, but when the ring (So) is deformed in this way, the intermediate member (La) pivotally supported by the turbine hub (G) is It becomes difficult to rotate smoothly with the expansion and contraction of the damper springs (nu), (nu). FIG. 5 shows a cross-sectional view of the shaft support structure of the turbine hub (g) that pivotally supports the intermediate member (La). In order to pivotally support the intermediate member (La) on the turbine hub (G). The bearing (f) is formed.

  And the attachment part (e) of the one side plate (l) of the lockup damper device and the attachment part of the turbine runner (b) are riveted to the turbine hub (g). By the way, when the turbine runner (b) rotates, it moves to the pump impeller side by the flow of the working fluid (bend), and this bending deformation acts as a large stress on the rivet fixed to the turbine hub (g). Therefore, it is difficult to support the bending deformation of the turbine runner (b) only with the rivet.

  Thus, the centering structure for the intermediate member of the damper device has the above-described problems. The problem to be solved by the present invention is this problem. The centering of the intermediate member is such that the intermediate member can be firmly and stably fixed to the turbine hub without distortion of the intermediate member due to centrifugal force. Provide structure and damper mounting structure.

  In the centering structure of the intermediate member according to the present invention, the outer periphery of the separator is guided instead of the inner periphery of the hole formed in the intermediate member. Therefore, the outer periphery of the separator has a predetermined radius concentric with the center of the intermediate member. This guide uses a rivet connecting both side plates constituting the damper device. The outer periphery of the turbine hub has a receiver extending toward the outer peripheral side on the turbine runner side, and one side plate of the damper device and a mounting portion of the turbine runner are fastened to the receiver.

  In the present invention, since the centering is performed by guiding the outer periphery of the separator provided in the intermediate member, the ring is not distorted due to the separator being pulled outward even if the centrifugal force accompanying high-speed rotation is applied. Therefore, as the damper springs expand and contract, the intermediate member rotates smoothly, and all the damper springs can be expanded and contracted evenly.

  And since it is the centering structure which guided the separator outer periphery, a bearing is not required in the turbine hub outer periphery. Therefore, the damper device can be mounted without being influenced by the structure of the built-in torque converter, fluid coupling, starting device, or the like. In addition, since a bearing centering on the outer periphery of the turbine hub is not required, a bearing can be provided instead on the turbine runner side, and the damper plate has a one-side plate attachment portion and a turbine runner attachment portion firmly attached to the receptacle. Can be fixed.

The damper apparatus provided with the centering which concerns on this invention. A specific example of an intermediate member. Intermediate member centering structure. Mounting structure of the lockup damper device. Conventional torque converter. Conventional damper device. Intermediate member distorted by centrifugal force.

  FIG. 1 is an embodiment showing a damper device employing an intermediate member centering structure according to the present invention. In the figure, 1 is an intermediate member, 2 is a central disk, 3 is a side plate, and 4 is a damper spring. This figure is a front view of the damper device including a partial cross section, in which the central disk 2 is sandwiched between both side plates 3, 3, and the damper springs 4, 4,.

  The basic structure is the same as that of the damper device shown in FIG. 6, and if the relative rotation occurs between the central disk 2 and the side plates 3, 3, the damper springs 4, 4,. It works to be able to. Therefore, spring retainers 5, 5,... Are provided on the inner periphery of the ring-shaped central disk 2, and two damper springs 4, 4 are arranged in series between the adjacent spring retainers 5, 5. Yes.

  And between the damper springs 4, 4 are separators 6, 6... Projecting to the outer periphery of the intermediate member 1, and the damper springs 4, 4 in series are spring housings formed on both side plates 3, 3. Part 7 is housed. Accordingly, when relative rotation occurs between the central disk 2 and the side plates 3 and 3, the damper springs 4, 4... Expand and contract, but at this time, all the damper springs 4, 4. Can be stretched.

  That is, the separator 6 is interposed between the damper springs 4 and 4 in the series state, and the intermediate member 1 can rotate as the damper springs 4 and 4 expand and contract. By the way, in order to rotate the intermediate member 1 accurately, guides 8, 8,. Moreover, the guides 8, 8... Have a structure in which spacers 10, 10... Are attached to the outer periphery of the rivets 9, 9.

  FIG. 2 shows a specific example of the intermediate member 1. As shown in the figure, the ring 11 has separators 6, 6, 6 projecting outward at three locations. The shape of the separator 6 is such that the side surfaces 12 and 12 are inclined so that the tip ends of the damper springs 4 and 4 can easily come into contact with each other. And the protrusions 13 and 13 are provided in the outer peripheral side, and it has comprised so that the front-end | tip of the damper springs 4 and 4 contact | abutted to the side surfaces 12 and 12 may not remove | deviate.

  The outer periphery 14 of the separator 6 is curved with a radius of curvature R from the center. Therefore, the intermediate member 1 rotates as the damper springs 4 and 4 expand and contract, but the guides 8, 8... That is, in the present invention, the spacers fitted to the rivets 9, 9... That fasten the both side plates 3, 3 of the damper device are not centered by the bearings formed on the outer periphery of the turbine hub as in the conventional torque converter. Centering is performed by using 10, 10... As guides 8, 8.

  That is, since the intermediate member 1 is centered in the damper device, the damper device can be applied to any torque converter or fluid coupling without depending on the form of the turbine hub. FIG. 3 is a detailed view of the guide 8 on which the intermediate member 1 is centered, and shows a lower cross section with respect to the central axis.

  The central disk 2 and the intermediate member 1 are sandwiched between both side plates 3a and 3b, but are riveted with a spacer 10 between them so that they can rotate. That is, both side plates 3a and 3b sandwich the central disk 2 and the intermediate member 1 with a slight clearance. The spacer 10 is in contact with the outer periphery 14 of the separator 6 of the intermediate member 1 to position (center) the intermediate member 1.

  FIG. 4 shows a partial cross section of the torque converter to which the damper device is attached. The damper device is positioned and attached to the turbine hub 15 as in the conventional torque converter. In this case, the attachment portion 16 of the side plate 3b and the attachment portion 17 of the turbine runner are provided on the outer periphery of the turbine hub 15. It is riveted to the catch 18.

  In the present invention, since the intermediate member 1 is centered by the guides 8, 8... Provided in the damper device, it is not necessary to provide a bearing on the turbine hub 15. Instead, a receiver 18 is formed on the turbine runner side. I can do it. When the turbine runner rotates, it receives the flow of the working fluid and bends and deforms toward the pump impeller side. However, it can be supported by the stress 18 acting on the attachment portion 17 at this time, and is directly attached to the rivet 19. The acting stress is reduced. That is, a stable and strong mounting structure is obtained by forming the receiver 18 on the outer periphery of the turbine hub 15 and mounting the damper device and the turbine runner.

DESCRIPTION OF SYMBOLS 1 Intermediate member 2 Central disk 3 Side plate 4 Damper spring 5 Spring retainer 6 Separator 7 Spring accommodating part 8 Guide 9 Rivet
10 Spacer
11 rings
12 sides
13 Projection
14 circumference
15 Turbine runner
16 Attachment
17 Attachment
18 Receiving
19 Rivet

Claims (1)

A damper spring housed in a torque converter, a fluid coupling, or a starting device, which can relieve impact torque and absorb engine torque fluctuations. An intermediate member that rotates together with the expansion and contraction of the shaft is rotatably supported, and the damper device sandwiches the central disk and the intermediate member between both side plates, and the outer peripheral portion is provided with a guide in which a spacer is fitted on the outer periphery of the rivet for fastening the both side plates Then, the outer periphery of the separator interposed between the damper springs in series is formed with a predetermined radius from the center, the outer periphery is in contact with the guide to center the intermediate member, and the attachment portion of the one side plate is attached to the turbine runner Fixed with a rivet etc. to the receiver on the turbine runner side of the turbine hub Mounting structure of the damper device characterized.

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