JPH0519615Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clutch disk that can be employed in passenger cars, industrial construction equipment vehicles, and other vehicles.

[Prior Art] This type of clutch disk includes a spline hub rotatably fitted to the inner circumference of an annular side plate (clutch plate, retaining plate), and an outer circumferential flange of the spline hub. The side plate and outer flange are
It is common and well known that square windows are arranged at multiple locations on the same circumference facing each other with gaps between them, and each corner window houses a torsion spring that expands and contracts in the circumferential direction. (For example, Jitsukaiaki
63−175320).

According to the above structure, the rotational force of the engine is transmitted from the side plate to the outer periphery flange via the torsion spring, and is elastically transmitted via the spline hub to the output shaft that serves as the input shaft of the transmission.

[Problems to be solved by the invention] However, in the above structure, the torsion springs are exposed to centrifugal force and extend outward in the radial direction of the side plates while the clutch disk is rotating, so the torsion springs are forced to close to each corner window. It slides into contact with the outer circumference side edge with impact. Therefore, there is a risk that the outer peripheral side edges of each corner window may be worn or damaged.

In order to prevent such a situation, the distance between the center of rotation of the clutch disk in the radial direction and each corner window is shortened, the outer circumferential side edge of each corner window is made thicker, and the distance in the circumferential direction of each corner window is made thicker. It is also conceivable to reduce the height of the torsion spring by setting the width narrower, but in these cases, sufficient torsional torque cannot be obtained.

This invention can obtain sufficient torsional torque,
Moreover, it is an object of the present invention to provide a clutch disk that is easy to assemble and does not come into contact with the outer peripheral side edge of each corner window even if the torsion spring is subjected to centrifugal force.

[Means for Solving the Problems] In order to solve the above problems, the present invention includes a spline hub rotatably fitted to the inner circumference of an annular side plate, and an outer periphery flange of the spline hub. In the clutch disk, the side plate and the outer peripheral flange are provided with corner windows arranged with gaps at multiple locations on the same circumference facing each other, and each corner window accommodates a torsion spring that expands and contracts in the circumferential direction. Each corner window includes an outer circumferential side edge and an inner circumferential side edge along the circumferential direction of the side plate, and the torsion spring includes a spring seat at both ends of the side plate in the circumferential direction, and the torsion spring includes: It is characterized by being formed of a drum-shaped bamboo shoot spring that becomes thicker as it goes from the center toward each of the spring seats.

[Operation] The torsion spring transmits the engine side rotational force transmitted to the side plate to the outer peripheral flange. When the torsion spring receives centrifugal force while the side plate is rotating, the overlapping portion between each pitch receives that force.

[First embodiment] As shown in FIG. 1, an annular clutch plate 1
Eight cushioning plates 12 (only three are shown in FIG. 1) are annularly fixed to the outer peripheral portion of the 0 (side plate) by rivets 11. Friction facings 13, which serve as input members for the rotational force of the engine, are fixed to both surfaces of each cushioning plate 12 by rivets 13a. As will be described later, the pressure plate 14 presses the friction facing 13 toward the flywheel 15, thereby transmitting the rotational force from the engine to the clutch disk.

At 90° intervals on the same circumference of the clutch plate 10, there is a rectangular corner window 16 (which overlaps with a corner window 23 of an outer peripheral flange 22, which will be described later).
is formed. The outer peripheral side edge 16a and the inner peripheral side edge 16b of the square window 16 in the radial direction of the clutch plate 10 are formed in an arc shape along the circumferential direction of the clutch plate 10.

A stop pin 17 is disposed between adjacent square windows 16, 16 in the circumferential direction of the clutch plate 10, and an annular retaining plate 18 (side plate) is integrally connected by this stop pin 17. The retaining plate 18 is disposed concentrically with the clutch plate 10 and has a square window 19 facing the square window 16. The square window 19 is disposed on the outer peripheral edge 16a of the square window 16.
and an outer peripheral edge 19a having the same shape as the inner peripheral edge 16b.
and an inner peripheral edge 19b.

An annular spline hub 20 is provided on the inner periphery of the clutch plate 10 and the retaining plate 18.
The outer peripheries of the two are fitted together.

The spline hub 20 is spline-fitted to an output shaft 21 serving as an input shaft of a transmission (not shown) so as to be slidable only in the axial direction (in the front and back directions of the paper). The spline hub 20 is integrally provided with an outer peripheral flange 22 that extends outward in the radial direction.

The outer peripheral flange 22 includes a square window 23 facing each of the square windows 16 and 19 of the clutch plate 10 and retaining plate 18, and a notch 24 facing the stop pin 17. Each corner window 23 includes outer peripheral side edges 16a, 1 of the corner window 16 of the clutch plate 10 and the corner window 19 of the retaining plate 18.
It has an outer circumferential side edge 23a and an inner circumferential side edge 23b having the same shape as the inner circumferential side edges 16b and 19b.
A torsion spring 25 is accommodated in these square windows 16, 19, 23 so as to be expandable and contractible in the circumferential direction of the clutch disk.

As shown in Figure 2, torsion spring 2
5 is provided with a pair of spring seats 26 and 27 at both circumferential ends of the clutch disk. A cylindrical body 29 integrally provided with an annular flange 28 in the center is disposed between each spring seat 26 and 27 so as to extend in the circumferential direction. Tapered bamboo springs 30 and 31 are arranged between each spring seat 26 and 27 and the cylindrical body 29, respectively.
These bamboo shoot springs 30 and 31 constitute a torsion spring 25. Here, the bamboo shoot springs 30 and 31 are fitted into the cylindrical body 29 with their tips facing each other, and their base ends are fitted into the cylindrical support parts 32 and 33 of each spring seat 26 and 27. There is. This allows the torsion spring 2
The bamboo shoot springs 30 and 31 constituting the spring 5 are connected through a cylindrical body 29 in a drum shape that becomes thicker toward the spring seats 26 and 27.

Next, the operation will be explained with reference to FIG.

Specifically, when the pressure plate 14 is driven toward the flywheel 15 by operating a clutch connection/disconnection mechanism (not shown), the friction facing 1
3 is pressed by the flywheel 15 and transmits rotational force in the direction of arrow R to the clutch plate 10 via the cushioning plate 12. As a result, the clutch plate 10 and the retaining plate 1
8 are about to rotate together in the direction of the arrow R, so the end faces of the respective square windows 16 and 19 on the opposite side of the movement press the spring seat 26 of each torsion spring 25 in the direction of the arrow R. Therefore, the torsion spring 25 is connected to the advancing side end surface of the corner window 23 and the corner window 1.
6 and 19, and the rotational force of the engine is elastically applied to the outer peripheral flange 22.
to communicate. Therefore, the rotational force on the engine side is smoothly transmitted to the output shaft 21 via the outer peripheral flange 22 and the spline hub 20.

In the present invention, since the torsion spring 25 is composed of the bamboo shoot springs 30 and 31, the stop pin 17 is inserted into the notch 2 of the outer periphery flange 22 after the torsion spring 25 begins to deflect.
The initial torsional torque is relatively small until it comes into contact with the end face of 4, and as the torsional angle increases, the torsional torque becomes as large as possible. Therefore each corner window 1
Large torsional torque can be obtained by making the most of the spaces 6, 19, and 23.

Next, when the stop pin 17 comes into contact with the end face of the notch 24 of the outer peripheral flange 22, the outer peripheral flange 22
rotates integrally with the clutch plate 10 and retaining plate 18. During this time, a strong centrifugal force generated by the rotational force of the clutch disk acts on the torsion spring 25, but each bamboo spring 30, 31 receives this force at the overlapped portion between the pitches, so it flies outward in the radial direction. It becomes difficult to get it out. Moreover, the bamboo shoot springs 30, 31 of the present invention are formed in a drum shape that becomes thicker toward the respective spring seats 26, 27, and each corner window 16, 1
9 and 23 are provided with outer circumferential side edges 16a, 19a, 23a and inner circumferential side edges 16b, 19b, 23b along the circumferential direction of the clutch plate 10, so that the thinnest intermediate portion protrudes slightly outward in the radial direction. However, each outer peripheral side edge 16 of each corner window 16, 19, 23
There is no sliding contact with a, 19a, 23a.

[Second Embodiment] In the following description, members corresponding to those explained in FIGS. 1 and 2 are given the same reference numerals.

As shown in Figure 3, the torsion spring 25
Alternatively, a bamboo shoot spring 40 formed by rolling a single spring steel plate into a drum shape may be adopted. For example, the spring steel plate of Takenoko Spring 40 is SUP4 or
SUP6 etc. can be adopted.

FIG. 4 shows a developed view of the bamboo shoot spring 40 of FIG. In FIG. 4, 40a is a rectangular base plate formed in a generally Y-shape, 40b is a leg extending in two forks from one end of the base plate 40a, and 40c is a leg extending from the confluence of the legs 40b to the base plate 40a. It is a slit that extends towards and parallel to it.

The torsion spring 25 shown in FIG. 3 can be formed by rolling this spring steel plate (bamboo spring) 40 along the base plate 40a as shown by arrow A and then heat-treating it.

[Effect of the invention] As explained above, according to the invention, each corner window 1 of the side plate (the clutch plate 10 and the retaining plate 18) and the outer peripheral flange 22
6, 19, and 23 are provided with outer peripheral side edges 16a, 19a, 23a and inner peripheral side edges 16b, 23b along the circumferential direction of the clutch plate 10, and the torsion spring 25 is connected to each spring seat 26 from the center thereof. , 19, 27 side, the torsion spring 25 is formed by the bamboo shoot springs 30, 31 or the bamboo shoot spring 40, which become thicker toward the sides of the clutch disc. 25 is each corner window 1
6, 19, 23 outer peripheral edges 16a, 19a, 23a
There is no sliding contact. Moreover, by adopting the bamboo shoot springs 30, 31 or the bamboo shoot spring 40 as the torsion spring 25, each corner window 16,
Sufficient torsional torque can be obtained by making maximum use of the spaces 19 and 23.

Moreover, the torsion spring 25 of the present invention is
Since the torsion spring 25 is formed by the drum-shaped bamboo shoot springs 30, 31 or the bamboo shoot spring 40, the outer shape of the torsion spring 25 is
It can be set to a shape that follows the arc of. Therefore, by adopting the present invention, assembly becomes easy.

Note that the present invention can also be applied to a structure that does not have a retaining plate.

[Brief explanation of drawings]

Fig. 1 is a front partial view of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is a front partial view of the present invention showing another embodiment, and Fig. 4 is a tow of Fig. 3. FIG. 3 is a developed view of a bamboo shoot spring that constitutes a spring. 10...Clutch plate (side plate),
16... Square window, 18... Retaining plate (side plate), 19... Square window, 20... Spline hub, 22... Outer flange, 23... Square window, 25... Torsion spring, 30, 3
1,40...Bamboo shoot spring.

Claims (1)

[Scope of utility model registration request] A spline hub rotatably fitted to the inner circumference of an annular side plate and an outer circumferential flange of the spline hub, the side plate and the outer circumferential flange having gaps at multiple locations on the same circumference facing each other. In the clutch disk, each corner window is provided with a torsion spring that extends and contracts in the circumferential direction. The torsion spring includes a spring seat at both ends of the side plate in the circumferential direction, and the torsion spring has a
A clutch disk characterized in that it is formed of a drum-shaped bamboo shoot spring that becomes thicker as it goes from the center toward each of the spring seats.