JPS6133318Y2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a direct clutch provided in a hydraulic unit such as a torque converter or a fluid coupling of an automatic transmission.

This type of direct coupling clutch has an annular piston that removably engages with the casing of a hydraulic unit connected to the input shaft, a central part connected to the output shaft via a turbine hub, etc., and a peripheral part that is identical to the corresponding position. a driven plate formed with a damper housing consisting of a pair of annular friction plates having a plurality of outer windows for mounting dampers in the shape of a plurality of damper mounting outer windows; an annular drive plate inserted between the plates and having an inner window for damper attachment corresponding to an outer window for attaching a damper in the friction plate; The vibration damper is attached to the shaft in the rotational direction, and the vibration damper absorbs shocks caused by fluctuations in the torque transmitted between the input and output shafts. However, conventionally, the outer window of the friction plate and the inner window of the drive plate both have two circular arcs that are coaxial with the axes of the input and output shafts and have a predetermined radius difference, and a predetermined arc that passes through the axes. It has a shape surrounded by two straight lines with an angle,
When the direct coupling clutch is rotating, the vibration damper is pushed outward by centrifugal force, and the outer edge 15a of the inner window 15b of the drive plate 15 is pressed against the outer window of the friction plate B, as shown in FIGS. 1 and 2. When the vibration damper 1 is located closer to the center than the outer edge 16c of the vibration damper 1
8 is in pressure contact with the outer edge 15a of the inner window, and when the drive plate 15 and the friction plate B perform relative movement as the transmission torque increases or decreases, the vibration damper 18
The contact momentum of the outer edge 15a of the inner window and the outer edge 15a of the inner window is P shown in FIG.
The driving plate 15 when the transmitted torque increases as shown in FIG.
The distribution increases in the direction of relative motion (direction of arrow K). Further, as shown in FIGS. 4 and 5, the outer edge 1 of the outer window 16a of the friction plate B
When the vibration damper 6c is located closer to the center than the outer edge 15a of the inner window 15b of the drive plate 15, the vibration damper 18 is in pressure contact with the outer edge 16c of the outer window, and the vibration damper 18 is in pressure contact with the outer edge 16c of the outer window, and the vibration damper 18 is in pressure contact with the outer edge 16c of the outer window. The relative momentum between the vibration damper 18 and the outer window outer edge 16c is the sixth
The distribution decreases in the direction of arrow K, as indicated by P' in the figure. The larger the contact momentum between the vibration damper and the outer edge of the inner window or the outer window, the more the wear of the vibration damper or the outer edge increases, so it is desirable that the contact momentum is as small as possible.

The object of the present invention is to provide a direct coupling clutch for a hydraulic unit that can significantly reduce the amount of contact momentum.The present invention will now be explained based on an embodiment shown in FIGS. 7 to 9.

FIG. 7 shows a cross section of the upper half of the hydraulic torque converter equipped with the direct coupling clutch of the present invention.

The hydraulic torque converter 1 is composed of a pump impeller 2, a turbine runner 3, and a stator 4, and a direct coupling clutch 5 is provided between the pump impeller 2 and the turbine runner 3 to mechanically directly connect them. Pump impeller 2 is pilot 6
and a casing 8 having a connecting nut 7, and is connected via the pilot 6 and the connecting nut 7 to an input shaft that also serves as an output shaft of the engine. The turbine runner 3 is connected by rivets 11 to a turbine hub 10 which is spline-fitted to the output shaft 9 of the torque converter 1. The stator 4 is connected to a fixed shaft 13 via a one-way clutch 12. The direct coupling clutch 5 includes an annular piston 14, a driving plate 15, a driven plate A, a vibration damper 18, a resistance member 19, and a sliding bearing 20. The driven plate A is attached to the turbine hub 10 by a rivet 11 in the center.
A pair of annular friction plates B, B each having a disk 17 fixed to the disk 17 and a pair of annular friction plates B, B each having a plurality of damper mounting outer windows 16a of the same shape fixed to the peripheral edge 17a of the disk with rivets 17b at corresponding positions.
The vibration damper housing 16 is made up of a vibration damper housing 16. The annular piston 14 has flange portions 14a and 14b on its inner circumference and outer circumference, respectively.The inner circumference flange portion 14a of the annular piston 14 is disposed on a sliding bearing 20 via a sealing material 21 so as to be movable in the axial direction. A spline 14c having a plurality of notches is formed in the portion 14b. Further, a friction material 22 is fixed to the disk-shaped portion of the annular piston 14, and is configured to engage with a friction surface 23 provided on the casing 8. Further, on both sides of the annular piston 14, an oil chamber 24 for engaging the direct coupling clutch partitioned by the annular piston 14 and an oil chamber 25 for disengaging the direct coupling clutch are formed.

The annular plate-shaped drive plate 15 has splines 15a' having a plurality of notches on its outer periphery, and engages with a spline 14c provided on the outer periphery flange portion 14b of the annular piston 14. Spline 1
4c and spline 15a' are each subjected to surface hardening treatment to prevent wear on their sliding surfaces.
Further, the inner part of the drive plate 15 is inserted between the pair of friction plates B, B, and in order to accommodate the vibration damper 18 in the circumferential direction in the inserted part, the drive plate 15 has an inner part that corresponds to the outer window 16a of the friction plate. A plurality of cutout inner windows 15b having the same shape are formed.

The housing 16 is a tab 1 in this embodiment.
The outer window 16a surrounded by the inner window 16b of the driving plate 15
The drive plate 15 has a pair of annular friction plates B, B arranged around the drive plate 15 in a facing relationship to the inner window 15b and the outer windows 16a, 16a, and is configured so that they correspond to each other. Vibration dampers 18, formed for example of coil springs, are inserted in the direction of rotation within the windows 15b and the outer windows 16a, 16a.

The outer window 16a of the friction plate B and the inner window 15b of the drive plate 15 are connected to the outer window 1 as shown in FIG.
Outer edge 16c and inner window 15b in the radial direction of 6a
The outer edge 15a in the radial direction of the outer window 16 is formed as the transmission torque of the direct coupling clutch increases.
In a region I on the side in the direction of relative movement between the inner window 15a and the inner window 15b, the outer edge 15a of the inner window is located outward in the rotational radial direction from the outer edge 16c of the outer window, and in the region I on the opposite side to the relative movement direction, the outer edge 16c of the outer window is the inner edge of the inner window. It is formed so as to be located outward from 15a.

When the direct coupling clutch 5 is rotating, the vibration damper 18 is in contact with the outer edge 15a of the inner window in the region,
In the region, it contacts the outer window outer edge 16c, and in the middle region, it contacts both. The contact momentum between the vibration damper 18 and the outer edge 15a of the inner window and the outer edge 16c of the outer window is distributed as shown in FIG. Has a great anti-wear effect.

Note that the inner window outer edge 15a and the outer window outer edge 16c can be easily formed by shifting the centers of circular arcs constituting these from the center of the output shaft.

[Brief explanation of the drawing]

Fig. 1 is an enlarged view of the main parts of a conventional direct coupling clutch for a hydraulic unit, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a contact momentum distribution diagram, and Fig. 4 is an enlarged view of the main parts of another conventional direct coupling clutch. Fig. 5 is a sectional view of the same, Fig. 6 is a contact momentum distribution diagram, Fig. 7 is an upper half sectional view of a hydraulic torque converter equipped with the direct coupling clutch of the present invention, and Fig. 8 is a damper section thereof. FIG. 9 is a partial front view of , and is a distribution diagram of contact momentum. In the figure, 5... Direct coupling clutch, 9... Output shaft, 1
4... Annular piston, 15... Annular drive plate, 1
5a... Outer edge of inner window, 15b... Inner window, 16... Damper housing, 16a... Outer window, 16c...
Outer window outer edge, A...driven plate, B...friction plate, P, P', Q...contact momentum.

Claims (1)

[Scope of utility model registration request] An annular piston that removably engages with a member connected to the input shaft, and a pair of pistons whose center portion is connected to the output shaft and whose peripheral portion is provided with a plurality of damper mounting windows having the same shape at corresponding positions. a driven plate on which a damper housing made of an annular friction plate is formed; and a driven plate connected to the annular piston and inserted between the annular friction plates, the insertion portion having a window for mounting the damper of the annular friction plate. A direct-coupled clutch for a hydraulic unit comprising an annular drive plate having an inner window for mounting a damper corresponding to the friction plate, and a vibration damper installed in the rotation direction within the window of the friction plate and the drive plate. The outer edge of the outer window provided on the plate in the radial direction and the outer edge of the inner window provided on the drive plate are the outer edge of the inner window in the direction of the relative movement between the outer window and the inner window that occurs as the transmission torque of the direct coupling clutch increases. A direct coupling clutch for a hydraulic unit, characterized in that the outer window and the inner window are formed such that the outer window is located outward from the outer edge of the outer window, and the outer window outer edge is located outward from the inner window outer edge on the side opposite to the relative movement. .