JPH0544603Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a torque fluctuation absorbing device for an engine.

(Prior Art) In engines of automobiles, ships, etc., a torque fluctuation absorbing device is provided in a power transmission device in order to absorb torque fluctuations thereof.

Conventional torque fluctuation absorbing devices of this type include, for example, Japanese Patent Application Laid-open No. 55-20930 and Japanese Patent Application Laid-open No. 55-20930.
There are devices as shown in Japanese Patent No. 20964 and as shown in FIG.

The conventional device will be explained in advance with reference to FIG. This torque fluctuation absorbing device includes a drive plate 101 that is connected to the crankshaft of the engine and rotates;
An inertial body is constituted by a flywheel 102 that is arranged concentrically in parallel with the drive plate 101 and rotates while being connected to a driven member so as to be able to rotate relative to the drive plate 101.
02, the spring mechanism 103 and the damping/
It consists of a device equipped with a torque limit mechanism 104, and the rotation of the crankshaft is transmitted to the flywheel 102 via a drive plate 101, a spring mechanism 103, and a damping/torque limit mechanism 104, so that torque fluctuations are absorbed. It's summery.

(Problem to be solved by the invention) However, in the above conventional torque fluctuation absorbing device, the damping/torque limit mechanism 104
Two driven disks 105 are used to connect the spring mechanism 103 to the end surface of the spring member 106 of the spring mechanism 103 and the cone spring 107. Therefore, the distance between the center of the end surface of the spring member 106 and the side of the drive plate 101 is determined by the thickness S of the arrangement space of the cone spring 107.
one-half of C+t+ must be considered.
S/2, and the thickness of the entire device increases.

The present invention aims to reliably receive the end face of the spring member without increasing the thickness of the device.
Consider it a technical issue.

[Structure of the invention] (Means for solving the problem) The technical means taken to achieve the above technical problem is to connect the driven disk, which constitutes and directly connects the spring mechanism and the damping/torque limit mechanism, to the spring mechanism. The cone spring is positioned so as to pass through the center point of the end surface of the spring member, and the thrust plate that constitutes the damping/torque limit mechanism is integrally and rotationally locked to the flywheel, and the cone spring is arranged between the thrust plate and the flywheel. .

(Function) With the above means, the distance between the center of the end surface of the spring member and the side portion of the drive plate may be C+T/2 (T corresponds to 2t) without considering the space of the cone spring.

(Example) Hereinafter, a preferred example of the torque fluctuation absorbing device of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, a drive plate 2 is connected by bolts to an engine crankshaft (not shown) serving as a drive shaft, and rotates integrally with the engine crankshaft. The drive plate 2 has ring-shaped drive plate main bodies 2a, 2b and side plates 2c, 2 made of steel plates.
d from both sides, and secure them with rivets 3 and screws 4.
It consists of things that are joined together. A ring gear 5 for a starter is configured on the outer periphery of the drive plate main body 2a.

A flywheel 6 is disposed parallel to the drive plate 2 and coaxially with the drive plate 2 so as to be rotatable relative to the drive plate 2. The flywheel 6 is rotatably supported by the drive plate 2 via a bearing 7. ing. The flywheel 6 is divided into two parts, a flywheel main body 6a and a driven plate 6b, in order to accommodate a damping/torque limit mechanism 15, which will be described later.
They are integrally connected to each other by 0.

A spring mechanism 12 is provided between the drive plate 2 and the flywheel 6. The spring mechanism 12 includes a coil spring 13 which is a spring member,
The spring seat 14 is provided at both ends of the coil spring 13 and is deformable with a stronger spring constant than the spring 13. The spring seats 14 provided at both ends of the coil spring 13 have the same shape, but one spring seat 14 contacts one side of the radial protrusion of the main body 2a of the drive plate 2, and the other The spring seat 14 has a structure that allows it to come into contact with a radially outwardly extending portion of a driven disk 16 of a damping/torque limit mechanism 15, which will be described later.

The damping/torque limit mechanism 15 is held by the flywheel 6, and the driven disk 16
and a cone spring 17 and a thrust plate 20 arranged on the flywheel main body 6a side.
, thrust plate 20 and driven disk 1
6 and between the driven disk 16 and the driven plate 6b, respectively. The cone spring 17 presses the lining 16a against the flywheel 6 side and provides a damping effect to vibrations due to torque fluctuations due to sliding friction loss. The cone spring 17 determines the pressing force of the driven disc 16 against the flywheel 6, but when the torque is within the frictional force determined by this pressing force, the driven disc 1
6 and the flywheel rotate together, and when the torque exceeds the frictional force, the driven disk 16 and the flywheel 6 cause relative slippage, cutting off the transmission of torque exceeding the frictional force.

The inner circumference of the thrust plate 20 has a width across flats portion 2.
0a is formed and is locked to the width across flat portion 6c of the plate 6b, so that it can rotate integrally with the driven disk 16.

A hysteresis mechanism 21 is provided between the side plate 2c of the drive plate 2 and the driven plate 6b.

Driven disk 16 is coil spring 13
The thickness T is doubled (T=2t) to maintain the same strength as the conventional two-plate type. As a result, the center of the end face of the coil spring 13 and the drive plate side plate 2
The distance to c is C+T/2.

In FIG. 3, a claw 20a' is provided on the outer periphery of the thrust plate 20' and is engaged with a hole 6'd provided in the flywheel body 6'a.

[Effect of idea]

The distance between the center of the end surface of the spring member and the side part of the drive plate may be C+T/2 (T corresponds to 2t) without considering the space for the cone spring, and the device can be made thinner.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a torque fluctuation absorbing device according to an embodiment of the present invention, and is a sectional view taken along the - line in FIG. 2, and FIG. 2 shows an internal structure of the device shown in FIG. FIG. 3 is a sectional view of another embodiment of the present invention, and FIG. 4 is a sectional view of a conventional torque fluctuation absorbing device. 1... Drive shaft (crankshaft), 2... Drive plate, 2c, 2d... Side plate, 6, 6'... Flywheel, 6a, 6'a... Flywheel body, 6b... Driven plate, 6c ... Width across flats portion, 12 ... Spring mechanism, 13 ... Coil spring (spring member), 15 ... Damping/torque limit mechanism, 16 ... Driven disk, 20, 2
0'... Thrust plate, 20a... Width across flats part,
20'a...Claw portion, 21...Hysteresis mechanism.

Claims (1)

[Scope of utility model registration request] A drive plate connected to a drive shaft and a flywheel disposed coaxially with the drive plate and supported on the drive plate in a relatively rotatable manner constitute an inertial body, and an inertial body is formed between the drive plate and the flywheel. , a torque fluctuation absorbing device in which a spring mechanism, a damping/torque limit mechanism, and a hysteresis mechanism are interposed, and the rotation of the drive shaft is transmitted to the flywheel via the drive plate, the spring mechanism, the damping/torque limit mechanism, and the hysteresis mechanism, A driven disk that constitutes and connects the spring mechanism and the damping/torque limit mechanism is positioned so as to pass through the center point of the end face of the spring member of the spring mechanism, and a thrust plate that constitutes the damping/torque limit mechanism is integrated with the flywheel. A torque fluctuation absorbing device comprising a cone spring which is rotationally locked and arranged between the thrust plate and the flywheel.