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Frictional coupling device of vehicular power transmitting device

A technology of power transmission device and friction engagement, which is applied in the direction of transmission device, friction clutch, fluid transmission device, etc., can solve the problems of loud sound, etc., and achieve the effect of suppressing the reduction of assembly and reducing the impact sound

Inactive Publication Date: 2019-10-01
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the state where the outer friction plate 91a and the inner friction plate 92a are engaged, for example, when the backlash in the rotational direction (gear side clearance) formed between the inner friction plate 92a and the clutch hub 92 decreases or disappears, May produce loud sound (crash)
On the other hand, if the backlash is reduced, the impact noise will be reduced, but if the backlash is too small, it may be difficult to assemble the inner friction plate 92a to the clutch hub 92 during assembly.
In addition, the friction engagement device is provided not only in the lock-up clutch of the torque converter, but also in the forward-reverse switching mechanism of the belt type continuously variable transmission, the stepped transmission, etc., and therefore the same problem occurs with these friction engagement devices.

Method used

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  • Frictional coupling device of vehicular power transmitting device
  • Frictional coupling device of vehicular power transmitting device
  • Frictional coupling device of vehicular power transmitting device

Examples

Experimental program
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Embodiment 1

[0043] figure 1It is a schematic diagram illustrating the structure of the vehicle power transmission device 10 to which the present invention is applied. This vehicle power transmission device 10 is a transverse type automatic transmission suitable for use in a FF (front-engine front-wheel drive) type vehicle, and is provided for power transmission between the engine 12 as a driving source for running and the drive wheels 24L, 24R. on the path. The output of the engine 12 consisting of an internal combustion engine passes through the crankshaft of the engine 12, the torque converter 14 as a fluid transmission device, through the forward and reverse switching device 16, the belt type continuously variable transmission (CVT) 18, the reduction gear device 20, and the differential gear device. 22 etc. are transmitted to the drive wheels 24L and 24R on the left and right.

[0044] The torque converter 14 is provided in the power transmission path between the engine 12 and the dr...

Embodiment 2

[0091] Figure 4 It is a cross-sectional view of a forward clutch C1x corresponding to another embodiment of the present invention. The forward clutch C1x is configured to include: the roller 54 ; the carrier hub 88 ; the frictional engagement portion 90 provided between the roller 54 and the carrier hub 88 ; and the piston 60 configured to be able to press the frictional engagement portion 90 . . In addition, since the roller 54 and the piston 60 are the same as those of the above-mentioned embodiment, the same reference numerals are assigned and detailed description thereof will be omitted. In addition, although the forward clutch C1x is in Figure 4 is omitted, but the spring 62, the holding plate 64, and the like are provided in the same manner as in the above-mentioned embodiment. In addition, the carrier hub 88 corresponds to the first rotating element of the present invention, and the forward clutch C1x corresponds to the frictional engagement device of the present i...

Embodiment 3

[0100] Figure 6 It is a diagram in which the inner peripheral spline teeth 104 formed on the roller 102 constituting the forward clutch C1y corresponding to still another embodiment of the present invention are developed in the rotational direction. exist Figure 6 Among them, the right side of the drawing corresponds to the turbine shaft 34 side in the direction of the axis CL, and the left side of the drawing corresponds to the driving side pulley 42 side in the direction of the axis CL.

[0101] In the present embodiment, in the inner peripheral spline teeth 104 formed on the drum 102, the interval between the adjacent tooth portions 104a in the rotation direction changes according to the direction of the axis CL. Specifically, at the end portion on the drive side pulley 42 side in the direction of the axis CL, there is an interval e between adjacent tooth portions 104a, and at the end portion on the turbine shaft 34 side in the direction of the axis CL, adjacent tooth po...

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PUM

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Abstract

The invention provides a frictional coupling device of a vehicular power transmitting device, which permits reduction of a sound of collision due to a backlash present in the frictional coupling device of the vehicular power transmitting device, while reducing the risk of deterioration of ease of its assembling. In a direction of the axis (CL) of peripheral spline teeth (68), a spacing distance between adjacent peripheral spline teeth (68) in a rotating direction decreases along the direction in which discs (70) are brought into engagement during assembling. Thus, a backlash formed between thediss (70) located at the extreme end of the direction in which the discs (70) are engaged and the peripheral spline teeth (68) becomes small. Therefore, in the state in which a friction engagement portion (58) is engaged, the direction in which the torque transmitted to a forward drive clutch (C1) is switched so as to reduce the sound of collision when the backlash formed between the discs (70) and the peripheral spline teeth (68) decreases or disappears on the opposite side.

Description

technical field [0001] The present invention relates to a friction engagement device included in a vehicle power transmission device provided on a power transmission path between a drive source and drive wheels. Background technique [0002] Among vehicle power transmission devices provided on a power transmission path between a drive source and drive wheels, a vehicle power transmission device provided with a friction engagement device for disconnecting or connecting a power transmission path between rotating members is known. For example, in Patent Document 1, a lock-up clutch 9 as a frictional engagement device is provided between the front cover 5 and the damper device 10 in the torque converter 3 . [0003] The lock-up clutch 9 includes: a plurality of outer friction plates 91a spline-fitted to the inner peripheral surface of the clutch drum 91; a plurality of inner friction plates 92a spline-fitted to the outer peripheral surface of the clutch hub 92; The piston 94 of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H41/24F16H45/02F16H55/14F16H47/06F16H47/08F16D25/061
CPCF16H41/24F16H45/02F16H55/14F16H47/065F16H47/08F16D25/061F16H2045/0284F16D25/0638F16D13/646F16D25/12F16D2001/102F16D2300/12F16D1/10
Inventor 西园纯一
Owner TOYOTA JIDOSHA KK