JPH0519613Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a torsion mechanism of a clutch disk in a clutch used in a vehicle such as an automobile.

(Prior Art) A conventional clutch disk includes a clutch hub and a disk plate having a clutch facing, which are provided so as to be able to be torsionally displaced relative to each other on the same axis. Some clutch hubs have an elastic ring or tension spring interposed between a pin fixed to the clutch hub and a tension spring to transmit torque between the clutch hub and the disc plate. The torsion mechanism of this type of clutch disc is, for example,
It is disclosed in Japanese Utility Model Publication No. 59-66028 and Japanese Utility Model Publication No. 47-36202.

In such a clutch disk, the amount of relative torsional displacement between the clutch hub and the disk plate,
To limit the so-called twist angle to a predetermined amount, twist limiting stop means are provided.

The structure of a conventional torsion limiting stopper means, for example, in the case of Japanese Utility Model Application No. 59-66028, one end of a pin on the clutch hub side is engaged with an arc-shaped stopper hole formed in a disc plate (or sub-plate). However, the stopper hole limits the range of relative movement of the pin.

(Problem to be solved by the invention) In the conventional torsion limiting stopper means described above, when the maximum value of the relative torsional displacement between the clutch hub and the disc plate is increased, the stopper hole should be arranged in the circumferential direction of the disc plate. It is better to make it large, so to speak, long. However, the stopper holes are provided in the disc plate in plurality (in the above publication, six
pcs), so if you make a long stopper hole,
The distance between adjacent stopper holes is reduced,
This will cause problems with the strength of the disk plate. Therefore, with the conventional torsion limiting structure, it is difficult to increase the amount of relative torsional displacement, and the degree of freedom in clutch disk design is low.

Therefore, in view of the problems in the conventional technology described above, the purpose of the present invention is to increase the maximum value of the relative torsional displacement between the clutch hub and the disc plate without causing problems such as a decrease in strength of the components of the clutch disc. , can be easily increased,
It is an object of the present invention to provide a torsion mechanism for a clutch disk that can increase the degree of freedom in clutch disk design.

(Means for Solving the Problems) The present invention for solving the problems in the conventional techniques described above provides a clutch hub and a disk plate having a clutch facing so as to be relatively torsionally displaceable on the same axis. A first damper sheet is rotatably supported on the flange on the outer periphery of the clutch hub via a pin, and a second damper sheet is rotatably supported on the disc plate via a pin. The gist of the structure is that a compression spring is interposed between the disks so as to be arranged in the radial direction of the disk, and a rigid member is interposed to limit the amount of relative displacement of the sheet.

(Function) According to the above-described means, when a relative torsional displacement occurs between the clutch hub and the disk plate, the first damper sheet and the second damper sheet each rotate about the pin as a fulcrum, and the compression spring As the spring is tilted and compressed, a stop torque is generated due to the elasticity of the spring, and this compression force on the compression spring causes torque transmission between the disc plate and the clutch hub.
Relative torsional displacement between the two is allowed.

And this clutch disk and torsion mechanism are
By limiting the amount of relative movement of the damper sheets by the rigid member interposed between the two damper sheets, the amount of relative torsional displacement between the clutch hub and the disk plate is limited to a predetermined amount.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, which shows a front sectional view of the clutch disk, and FIG. 2, which shows a partially cutaway side view of the same, a clutch hub 1 has a flange portion 2 on its outer periphery, and a transmission part on its inner periphery. Input shaft (not shown)
It has a spline groove 3 that is spline-fitted with the spline groove.

On one side (left side in FIG. 1) of the flange portion 2 of the clutch hub 1, a disk plate 4 having an approximately annular flat plate shape is connected to a liner 5 and a snap spring 6.
It is arranged so that it can be torsionally displaced relative to the clutch hub 1 on the same axis via the clutch hub 1, that is, it can be rotated. A clutch facing 8 is provided on the outer periphery of the disc plate 4 via a disc spring 7.

A pin 9 is attached to the flange portion 2 of the clutch hub 1 by caulking. Further, a pin 10 which is parallel to the pin 9 at a position outward from the pin 9 is attached to the disk plate 4 by caulking.

As shown in FIG. 3, the first and second damper sheets 11 and 12 rotatably supported by the pins 9 and 10 are made of a metal strip plate material with a cross section of approximately L.
They have the same shape and are bent into a letter shape, and the horizontal piece serves as the spring support part 13.
The vertical piece serves as a contact portion 14 that makes surface contact with the other damper sheet 12, 11. Contact part 14
A pin hole 15 is formed at the end of the contact portion 14 , and a substantially triangular opening hole 16 is formed from the center of the contact portion 14 to the spring support portion 13 .

The first damper sheet 11 has a pin hole 15 rotatably supported by the pin 9 via a bush 17 on one side of the flange portion 2 of the clutch hub 1 (on the right side in FIG. 1). The other pin 10 is attached to the top of the opening hole 16.
The pin hole 15 of the second damper sheet 12 is rotatably supported by the pin 10 via the bush 18, and the second damper sheet 12 has a pin hole 15 rotatably supported by the pin 10 via the bush 18, and a The pin 9 is inserted together with the bush 17, and both spring support parts 13 are opposed to each other in parallel. In addition,
The contact portion 14 of the second damper sheet 12 is connected to the flange portion 2 of the clutch hub 1 and the disc plate 4.
and the contact portion 14 of the first damper sheet 11.

Furthermore, wave washers 19 and 20 are fitted into the bushes 17 and 18, respectively, between the flange parts 9a and 10a formed at the ends of the pins 9 and 10 and the contact part 14 of the first damper sheet 11. It is inserted in the inserted state. This dress 1
Due to the elasticity of 9 and 20, both damper sheets 11,
12 is pressed against the flange portion 2 of the clutch hub 1 and the disk plate 4 side, more specifically, by the flange portions (numerals omitted) of the bushes 17 and 18, the contact portions 14 of both damper sheets 11 and 12 are pressed. Frictional force between the plates is generated during this period, giving large hysteresis to the torsional characteristics.

A compression spring 21 made of a coil spring is interposed between the spring support portions 13 of the first damper sheet 11 and the second damper sheet 12 so as to be arranged in the radial direction of the disk.

However, the compression spring 2
A cylindrical rigid member 22 made of a rigid material such as a metal rod is fitted into the interior of the housing 1 . Rigid member 2
The length L of 2 is defined as C, the distance between the spring support parts 13 of both damper sheets 11 and 12, and D, the maximum value of the relative movement amount between the spring support parts 13 (hereinafter referred to as the maximum relative movement amount). Then, the settings are made to satisfy the following relationship: D=CL L=CD. Therefore, the rigid member 22 connects the clutch hub 1 and the disc plate 4.
The relative torsional displacement amount of both damper sheets 11 and 12 is limited to the maximum relative displacement amount D so that the amount of relative torsional displacement between the two damper sheets 11 and 12 is within a necessary and sufficient range, thereby preventing the displacement of both 1 and 4 more than necessary.

In this embodiment, four sets of the above mechanisms are arranged on the circumference of the clutch disk.

In the clutch disk torsion mechanism described above, when a relative torsional displacement occurs between the clutch hub 1 and the disk plate 4, the first damper sheet 11 and the second damper sheet 12 rotate about the pins 9 and 10, respectively. However, as the compression spring 21 is tilted and compressed, the spring 21 generates a stop torque. The compression spring 21 is tilted as the damper sheets 11 and 12 rotate so that the axis of the spring 21 is substantially parallel to the straight line connecting the axes of the pins 9 and 10.

For example, in FIG. 2, if it is assumed that the clutch hub 1 is relatively torsionally displaced in the counterclockwise direction and the disk plate 4 is relatively torsionally displaced in the clockwise direction, the first damper seat 11 is rotated clockwise about the pin 9 and , the second damper sheet 12 rotates clockwise about the pin 10, and the compression spring 21 is tilted (see the two-dot chain line A in FIG. 2) and compressed. A stop torque is generated due to the elasticity of the spring 21, and this compressive force on the compression spring 21 causes torque transmission between the clutch hub 1 and the disc plate 4, and
Relative torsional displacement of both 1 and 4 is allowed.

Further, in this clutch disk torsion mechanism, the relative movement amount of the damper sheets 11 and 12 is limited to the maximum relative movement amount D by the rigid member 22 interposed between the damper sheets 11 and 12. That is, due to the relative torsional displacement between the clutch hub 1 and the disk plate 4, both damper sheets 11 and 12
When the spring support members 13 are relatively moved in a direction that reduces the distance between them, the spring support parts 13 come into contact with the upper and lower end surfaces of the rigid member 22, preventing the movement, and further movement of the compression spring 21 compression does not occur. As a result, the amount of relative torsional displacement between the clutch hub 1 and the disk plate 4 is limited to a predetermined amount, that is, the maximum relative movement amount D.

Note that the rigid member 22 in the embodiment may be modified as follows.

(1) As shown in Figure 4, it has a cylindrical shape, and
The upper and lower rigid members 23 have a flange portion 23a at one end, and the member 23 is fitted to the end of the compression spring 21, and the spring 21 is attached to the flange portion 23a.
The flange portion 23a is brought into contact with each spring support portion 13 of the damper sheets 11, 12 by the elasticity of the compression spring 21, and the distance between the two rigid members 23 is Set the maximum relative movement amount D of 11 and 12. According to this rigid member 23, the relative movement of the damper sheets 11 and 12 more than necessary can be restricted by the members 23 coming into contact with each other.

(2) As shown in FIG. 5, elastic members 24 are fitted to both ends of the rigid member 22 of the above embodiment. According to this, as shown in the torsion characteristic diagram shown by the solid line in FIG. A stop torque is generated by the compression spring 21, and when the angle θ or more is generated, a high stop torque is generated due to the combination of the compression spring 21 and the elastic body 24, and the torsion characteristics of the clutch disk can be set in multiple stages. Note that the broken line portion a in FIG. 6 shows the torsion characteristic diagram of the rigid member (of the above embodiment) without the elastic material 24.

(3) The rigid member 22 of the embodiment is divided into upper and lower parts into a rigid member 25, and between the two rigid members 25, as shown in FIG. 6, a cylindrical elastic member 2 is inserted.
6. Alternatively, as shown in FIG. 7, a cylindrical elastic member 27 may be interposed by adhesive or the like.
Even in this case, multi-stage torsion characteristics can be obtained as in the case of item (2) above.

In addition, in FIG. 4, FIG. 5, FIG. 7, and FIG. 8, the same reference numerals are extracted and written for the same parts as in the embodiment.

In addition, the compression spring 21 has
Instead of a coil spring, an elastic rubber material can also be used.

(Effect of the invention) That is, according to the invention, when a relative torsional angular displacement occurs between the clutch hub and the disk plate, the first damper sheet and the second damper sheet each rotate about the pin as a fulcrum, As the compression spring is tilted and compressed, a stop torque is generated due to the elasticity of the spring, and the compression force on the compression spring prevents torque transmission between the disc plate and the clutch hub. The function of the clutch is achieved by allowing relative torsional displacement between the two.

In particular, this clutch disk torsion mechanism limits the relative movement of the damper sheet by a rigid member interposed between both damper sheets, so that the relative torsional displacement between the clutch hub and the disk plate can be controlled at a certain level. Since the relative torsional displacement is limited to a fixed amount, the maximum value of the relative torsional displacement can be freely changed by setting the length of the rigid member. It has the effect that it can be easily increased without causing problems such as deterioration, and that the degree of freedom in clutch disk design can be increased.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front sectional view of the clutch disk;
Fig. 2 is a partially cutaway side view of the same part, Fig. 3 is a perspective view of the damper seat, Figs. 4 and 5 are sectional views of the clutch disk showing modified examples of the rigid member, and Fig. 6 is the same as Fig. 5. The torsion characteristic diagrams of the clutch disk, FIGS. 7 and 8 are sectional views of essential parts showing other examples of the rigid member shown in FIG. 5, respectively. 1...clutch hub, 2...flange section, 4...
... Disk plate, 8 ... Clutch facing, 9, 10 ... Pin, 11 ... First damper sheet, 12 ... Second damper sheet, 21 ... Compression spring, 22 ... Rigid member.

Claims (1)

[Scope of utility model registration request] A clutch hub and a disk plate having a clutch facing are provided so as to be relatively torsionally displaceable on the same axis, and a first damper sheet is rotatably supported via a pin on a flange portion on the outer periphery of the clutch hub. A second damper sheet is rotatably supported on the plate via a pin, and a compression spring is interposed between both damper sheets so as to be arranged in the radial direction of the disk, and the relative displacement of the second damper sheet is A clutch disk torsion mechanism characterized by interposing a rigid member that limits the amount of rotation.