JPS632689Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hydraulic torque converter with a direct coupling clutch.

an input shaft, an output shaft, a hydraulic torque converter installed between the input shaft and the output shaft and including a pump impeller, a turbine runner, and a stator; A hydraulic torque converter with a direct coupling clutch having a selective coupling coupling is already known as a device to be incorporated into the drive train of a motor vehicle. In many of the devices proposed so far as this type of hydraulic torque converter with a direct coupling clutch, the direct coupling clutch portion is located in the middle of the rotational power transmission path, and is spaced apart from each other in the axial direction and rotated from each other in the rotational direction. a third disk element arranged between these two disk elements and rotatable relative to these two disk elements; and a third disk element connected to the first and second disk elements; a rotary damper including a compression coil spring acting between the second disk element and the third disk element, thereby imparting flexibility in the rotational direction to the rotational power transmission path by the direct coupling clutch; It is designed to prevent rotational shock from occurring between the input shaft and the output shaft, that is, between the engine and the drive wheels when the direct coupling clutch is engaged or released.

Conventionally, rotary dampers with such a configuration have been constructed with a relatively small diameter, that is, with a relatively small diameter of the circumferential arc portion in which the compression coil spring is disposed. In order to solve the problem of assembling a direct coupling clutch and a torque converter as compactly as possible, when a torque converter having an overall torus shape and a disc-shaped direct coupling clutch are arranged adjacent to each other in the axial direction, the torque is increased. In order to effectively utilize the annular space with an approximately triangular cross section left around the converter and clutch disk, we focused on locating the compression coil spring of the rotary damper in this area. It is conceivable to configure the damper as a structure in which the radius of the circumferential arc portion on which the compression coil spring is disposed is relatively large.

In the present invention, when the rotary damper is configured as a relatively large-diameter damper as described above, it becomes an annular member with a large center hole that cannot be rotationally supported by the third disk element or its axis. It is an object of the present invention to provide a torque converter with an improved rotary damper having a structure for supporting such an annular third disc element such that it rotates stably about its true axis. It is said that

According to the present invention, the present invention provides a hydraulic torque converter that includes an input shaft, an output shaft, a pump impeller, a turbine runner, and a stator that are incorporated between the input shaft and the output shaft; In a hydraulic torque converter with a direct coupling clutch, the front cover connected to the pump impeller operates as one of the clutch disks, and the direct coupling clutch selectively directly couples the input shaft to the output shaft. first and second disk elements spaced from each other in the axial direction and connected to each other in the rotational direction in the middle of the rotational power transmission path; a rotary damper including a relatively rotatable third disk element and a compression coil spring acting between the first and second disk elements and the third disk element; and the second disk element are connected to each other by a plurality of pins extending parallel to their central axes and spaced along their peripheries, and the third disk element is a plurality of arcuate holes defined by both inner and outer circumferential edges of an arcuate shape and through which the pins pass, and the pins are rotatably attached to the inner or outer circumference edges of the arcuate holes; It is configured to be supported concentrically with respect to the first and second disk elements by engaging through an annular spacer, and includes an engagement portion between the compression coil spring and the pin and the circular arc hole. The main part of the rotary damper is formed by a hydraulic torque converter with a direct coupling clutch, characterized in that the main part of the rotary damper is disposed along the outer periphery of the turbine runner in an annular space left between the outer periphery and the front cover. It will be achieved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of a hydraulic torque converter with a direct coupling clutch according to the present invention incorporating the improved rotary damper as described above, and FIG. −
3 is a partial side view of the first disk element, looking in the direction; FIG. 3 is a cross-sectional view of the disk element taken along the line - in FIG.
The figure is an enlarged sectional view taken along the line - in FIG. 1.

In the figure, reference numeral 1 denotes an input shaft, which is rotated clockwise when viewed from the right side of FIG. 1 by an engine (not shown). A flywheel 2 is connected to the input shaft 1, and a front cover 3 is connected to the flywheel 2 with bolts 4 so as to rotate together with the flywheel. The front cover 3 is connected to the peripheral edge of the pump impeller 5 at its peripheral edge. The pump impeller 5 is supported by a hollow shaft 6 concentric with the input shaft 1, which is adapted to drive a hydraulic pump 7.
The hollow shaft 6 is placed around a sleeve 9 that is fixedly supported by a torque converter housing 8, and is rotatably supported by a hub portion 8a of the housing 8 via a bearing element 10.

The output shaft 1 passes through the inside of the hollow shaft 6 and concentrically therewith.
1 is placed. A turbine runner 13 disposed opposite the pump impeller 5 in a fluid chamber 12 defined by the front cover 3 and the pump impeller 5 is connected to the output shaft 11 through a hub 14 for torque transmission. has been done. A stator 15 is provided between the pump impeller 5 and the turbine runner 3 and is supported by the sleeve 9 via a one-way clutch 16 for guiding the fluid flow back from the turbine runner to the pump impeller.

The hub 14 has a cylindrical surface 17 formed on its outer circumference, and a cylindrical inner circumferential surface 19 provided along the inner circumference of an annular piston element 18 disposed within the fluid chamber 12. An annular groove 20 is formed in the cylindrical outer circumferential surface 17 of the hub 14 in which the hub 14 is slidably engaged, and a seal ring 21 is disposed within the annular groove.
is fitted into the cylindrical outer circumferential surface 17 of the hub 14 and the cylindrical inner circumferential surface 19 of the piston element 18. Piston element 18
A piston-shaped outer circumferential surface 22 is formed on the outer circumference of the front cover 3 , and the piston-shaped outer circumferential surface is disposed close to a cylindrical inner circumferential surface 23 formed on the circumferential edge of the front cover 3 . The piston element 18 thus constitutes a piston that slides within an annular cylinder defined between the cylindrical outer circumferential surface 17 of the hub 14 and the cylindrical inner circumferential surface 23 of the front cover 3. An annular clutch lining 24 is provided on the inner surface of the front cover 3 facing the piston element 18 .

A disk element 26 is further secured to the hub 14 by a pin 25. An annular disk element 27 is arranged opposite to the peripheral edge of this disk element, and these two disk elements 26 and 2
7 are connected to each other by pins 28 extending parallel to their axes and spaced along their periphery. Between these disk elements 26 and 27, another annular disk element 29 is arranged so as to be rotatable relative to the disk elements 26 and 27 and the pin 28 connecting them.

As best shown in FIG. 5, which shows a cross-section taken along line 1 in FIG. The pin 28 passes through such a circular arc hole. In the illustrated embodiment, a spacer 44 is attached to the portion of the pin 28 that passes through the circular arc hole 43.
The spacer is rotatable about the pin 28 like a roller. In the illustrated embodiment, the spacer 44 is in contact with the radially inner arcuate edge 43a of the arcuate hole 43, and the abutment between the spacer 44 and the arcuate edge 43a is caused by the disk element 29. The disk element 29 is removed from the disk element 26 and the disk element 26 by simultaneously performing the process at a plurality of locations spaced apart along the circumferential direction (in the illustrated embodiment, four locations as easily understood from FIG. 2). 2
7 is maintained concentrically.

A suitable friction element may be interposed between the disc element 29 and the disc elements 26 and/or 27 to provide a damping force against the relative rotational movement between them, thereby causing the rotary damper to It is possible to prevent vibrations from occurring due to repetition of relative rotation in the forward and reverse directions.

The disc element 29 is connected at its outer periphery to the outer periphery of the piston element 18, in particular in a torque transmitting relationship. A plurality of helical compression springs 30 are provided between the disc elements 26 and 27 and the disc element 29, spaced along their peripheries, thereby causing the disc elements 26, 27 and 29 to
The disc element, the pin and the compression helical spring constitute a rotary damper acting between the piston element 18 and the hub 14, as they are mutually flexible in the direction of rotation.

2 and 3 are a plan view and a sectional view showing the details of the disk element 26, and FIG. 4 is an exploded perspective view showing the structure in which the compression coil spring 30 is installed at the peripheral edge of the disk element 26. It is. As can be understood from these figures, an annular flange portion 40 is formed on the peripheral edge of the disk element 26 and bulges along several circumferential arc portions. Corresponding to the annular flange portion 40 of the disk element 26, a similar annular flange portion 41 is formed in the disk element 27 along its circumference. Annular flange portion 40 on these two disk elements
and 41 are located at positions facing each other in the axial direction, and are bulged in the direction of moving away from each other. Also, corresponding to these annular flange parts 40 and 41,
The circumferential arc of the disc element 29 located between the disc elements 26 and 27 has an opening 42 along it.
is formed. The above-mentioned compression coil spring 30 is disposed within this opening 42, and its both side edges are supported by annular flanges 40 and 41. In this case, the disk elements 26 and 27 in the assembled state as shown in FIG.
When a relative rotational displacement occurs between the disk element 26 and the disk element 26, as shown by arrows A and B in FIG. annular flange portion 4
The right end 40a in FIG. 4 of FIG.
The left end of the helical compression spring 30 in FIG.
The left edge 42a of the opening 42 of No. 9 in FIG.
and is supported by this.

In the fluid type torque converter with a direct coupling clutch shown in FIG. be introduced. This pushes the piston element 18 towards the front cover 3 and lining 2
frictionally engages with the front cover 3 via 4;
Rotational power is mechanically transmitted from the input shaft 1 to the output shaft 11 via the front cover 3, piston element 18, disk element 29, compression coil spring 30, disk elements 26 and 27, and hub 14. When torque suddenly increases during the process of transmitting rotational power, the compression coil spring 30 is temporarily greatly compressed, absorbing the sudden increase in torque and preventing shocking changes in the transmission of rotational power. Provides a buffering effect.

Hydraulic pressure is supplied through the oil passage 33, and the oil pressure is thereby transferred from the groove 34 formed in the output shaft 11 to the chamber 3.
5. When supplied between the front cover 3 and the piston element 18 through the groove 37 of the washer 36,
The piston element 18 is driven in a direction away from the front cover 3, and the piston element and the lining 2
4 is released, and the output shaft 1 is moved from the input shaft 1.
Rotational power is transmitted to the pump impeller 1 through a hydraulic torque converter comprising a pump impeller 5, a turbine runner 13, and a stator 15.

Although the present invention has been described above in detail with respect to one implementation series, the present invention is not limited to such an embodiment, and various modifications can be made to such an embodiment within the scope of the present invention. This will be obvious to those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of a hydraulic torque converter with a direct coupling clutch according to the present invention. FIG. 2 is a plan view of the disk element 26 shown in FIG. line -
FIG. 4 is an exploded perspective view of the main parts of the rotary damper at its periphery, and FIG. It is a sectional view of a pin. 1...Input shaft, 2...Flywheel, 3...
Front cover, 4... Bolt, 5... Pump impeller, 6... Hollow shaft, 7... Oil pump, 8...
Housing, 9... Sleeve, 10... Bearing element, 11... Output shaft, 12... Fluid chamber, 13...
Turbine runner, 14... Hub, 15... Stator, 16... One-way clutch, 17... Outer circumferential surface of hub, 18... Piston element, 19... Inner circumferential surface of piston element, 20... Annular groove, 21 ... Seal ring, 22 ... Outer peripheral surface of piston element, 2
3... Inner peripheral surface of the outer edge of the front cover, 24...
... Lining, 25 ... Pin, 26, 27 ... Disk element, 28 ... Pin, 29 ... Disk element, 30 ... Compression coil spring, 32, 33 ... Oil passage, 34 ... Oil groove, 35 ... ... Chamber, 36 ... Washer, 37 ... Groove, 40, 41 ... Annular flange portion, 42 ... Opening, 43 ... Arc hole, 44 ... Spacer.

Claims (1)

[Scope of utility model registration request] a hydraulic torque converter that includes an input shaft, an output shaft, a pump impeller, a turbine runner, and a stator installed between the input shaft and the output shaft;
In the hydraulic torque converter with a direct coupling clutch, the front cover that connects the input shaft and the pump impeller operates as one of the clutch disks, and the direct coupling clutch selectively directly couples the input shaft to the output shaft. A direct coupling clutch has first and second disk elements spaced from each other in the axial direction and connected to each other in the rotational direction in the middle of the rotational power transmission path, and the direct coupling clutch is arranged between these two disk elements and The rotary damper includes a third disk element rotatable relative to the disk element, and a compression coil spring acting between the first and second disk elements and the third disk element. , the first and second disk elements are connected to each other by a plurality of pins extending parallel to their central axes and spaced along their peripheries, and the third disk element is connected to each other by a plurality of pins extending parallel to their central axes and spaced apart along their peripheries; A plurality of circular arc holes defined by both inner and outer peripheral edges of an arc having a center on the axis line and through which the pins pass, and the pin is rotatable around the inner or outer peripheral edge of the circular arc holes. The disk element is configured to be supported concentrically with respect to the first and second disk elements by engaging through an annular spacer attached to the disk element, and the engagement between the compression coil spring and the pin and the circular arc hole The main part of the rotary damper including the coupling part is disposed along the outer circumference of the turbine runner in an annular space left between the outer circumference and the front cover. torque converter.