JP3223025B2 - Vehicle clutch disc - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch disk for a vehicle, and more particularly, to a housing plate fixed to an input shaft such as a transmission, a clutch lining for receiving power to be transmitted to the input shaft, and the like. A lining support plate that holds the clutch lining and is connected to the housing plate so as to be rotatable relative to the housing plate within a certain angle range, and is interposed between the housing plate and the lining support plate to be interposed between these lining support plates and A vehicle clutch comprising a torsion spring that enables transmission of torque between housing plates and vibration damping means interposed between the housing plate and the lining support plate to absorb and attenuate driving torque by viscous resistance. It relates to improvement of a disk.

[0002]

2. Description of the Related Art Conventionally, a friction clutch mechanism is generally provided between an automobile engine and a manual transmission, and transmits a driving force of the engine to the transmission according to a driver's operation of a clutch pedal. And can be turned off. FIG. 3 shows a conventional example of a vehicle clutch disk 1 used for such a friction clutch.

As shown in FIG. 3, a clutch disk 1 for a vehicle includes an insertion boss 2 into which an input shaft of a transmission is spline-fitted, and a housing fixed to the input shaft of the transmission via the insertion boss 2. Plate 3, a clutch lining 4 for receiving power to be transmitted to the input shaft of the transmission from the engine side, and holding the clutch lining 4 and in both forward and reverse directions within a certain angle range with respect to the housing plate 3. A lining support plate 5 rotatably connected, and a torsion spring 6 interposed between the housing plate 3 and the lining support plate 5 to enable torque transmission between the lining support plate 5 and the housing plate 3. , Housing plate 3 and lining support plate 5
And vibration damping means 7 interposed between them to absorb and attenuate the driving torque.

[0004] The insertion boss 2 has a spline 9 fitted on the input shaft of the transmission formed on the inner periphery and a spline 1 for engaging the housing plate 3 on the outer periphery.
0 is formed. The housing plate 3
A pair of lining support plates 5 is provided so as to sandwich the lining support plate 5, and the center portion is fixed to the insertion boss 2 by fitting into the spline 10 of the insertion boss 2. Also, the center sides of the pair of housing plates 3 that sandwich the lining support plate 5 bulge outward from each other,
An accommodation space 12 for the vibration damping means 7 is formed. The clutch lining 4 receives the output of the engine when pressed by a flywheel, which is the output section of the engine, by a biasing means (not shown).

The torsion spring 6 absorbs an impact in the rotational direction when the clutch lining 4 is pressed against the flywheel of the engine, and fixes the engine output (driving force) transmitted to the clutch lining 4 by the clutch lining 4. From the lining support plate 5 to the housing plate 3. Therefore, the torsion spring 6 repeats expansion and contraction in accordance with the magnitude of the driving force transmitted between the lining support plate 5 and the housing plate 3, and torsional vibration occurs due to output fluctuation (torque fluctuation) on the engine side. Then, a relative rotational vibration is generated between the lining support plate 5 and the housing plate 3.

In order to rapidly attenuate the relative rotational vibration between the lining support plate 5 and the housing plate 3, a vibration damping means 7 is provided. Vibration damping means 7
Is a so-called viscous fluid coupling (a viscous coupling), which is provided between the pair of housing plates 3 and the lining support plate 5 to enclose a viscous fluid, The insertion boss 2 which is arranged in the inside and is spline-fitted to the outer periphery of an inner joint member 18 described below to fix the housing plate 3
The first viscous plate 15 held on the side and the first viscous plate 15 are alternately stacked and arranged in the enclosed space 14 and are spline-fitted to the inner diameter of the lining support plate 5 to thereby provide the lining support plate 5. And the second viscous plate 16 held by the first viscous plate 15 is used to absorb and attenuate the driving torque by viscous resistance acting when the first viscous plate 15 and the second viscous plate 16 rotate relative to each other. That is, the relative rotational vibration between the lining support plate 5 and the housing plate 3 is attenuated.

The sealing space 14 has a cylindrical inner joint member 18 spline-fitted to the spline 10 on the outer peripheral portion of the insertion boss 2, and is rotatably fitted to the inner joint member 18 and has an inner diameter of the lining support plate 5. It is defined in the accommodation space 12 by cooperation with a pair of outer joint members 19 connected to the portion. The sliding portion between the inner joint member 18 and each outer joint member 19 where relative rotation occurs is provided with a seal member 20 to ensure the sealing performance of the sealed space 14.

[0008]

By the way, for the purpose of securing a larger living space in the vehicle or increasing the degree of freedom in the layout design of the power transmission mechanism, the mechanical parts of the automobile are reduced in size and weight. This is an important issue, and there is a strong demand for the aforementioned vehicle clutch disk, and also for the vibration damping means 7 used therein to be smaller and lighter.

However, in the conventional vehicle clutch disk 1 described above, the viscous plates 15 and 16 have large diameters due to the structure in which the vibration damping means 7 is provided on the outer peripheral side of the insertion boss 2 through which the input shaft of the transmission is inserted. This makes it difficult to reduce the size and weight of the vibration damping means 7. Since the vibration damping means 7 is provided on the outer peripheral side of the insertion boss 2, the diameter of the housing plate 3 and the lining support plate 5 is also increased, which makes it difficult to reduce the size and weight of the vehicle clutch disk 1. there were. Further, in the above-described conventional vehicle clutch disc 1, a seal member 20 must be provided for each outer joint member 19 constituting the enclosed space 14, and in order to improve the sealing performance, each of the outer joint members 19 must be provided with a separate seal member 20. It is necessary to control the processing accuracy and the assembly accuracy of the joint member 19 and the inner joint member 18 with high accuracy.
There is also a problem that it is difficult to reduce the manufacturing cost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is possible to reduce the diameter of a viscous plate which is a component of the vibration damping means. The size and weight of the clutch disc as a whole can be reduced, and the reliability of the sealing performance can be improved at the same time as the reliability of the sealing performance is improved by reducing the installation location of the sealing member for obtaining the enclosed space for the vibration damping means. An object of the present invention is to provide a vehicle clutch disk that can reduce costs.

[0011]

SUMMARY OF THE INVENTION The object of the present invention is to provide a housing plate fixed to an input shaft of a transmission, a clutch lining for receiving power to be transmitted to the input shaft, and a clutch lining. A lining support plate which is held and is connected to the housing plate so as to be rotatable relative to the housing plate within a predetermined angle range; and a lining support plate and a housing plate interposed between the housing plate and the lining support plate. A torsion spring that enables torque transmission between the housing plate and the lining support plate, and a vibration damping unit that absorbs and attenuates a driving torque interposed between the housing plate and the lining support plate, and the vibration damping unit includes the housing damping unit. A sealed space provided between the plate and the lining support plate and filled with a viscous fluid; and A first viscous plate held by the housing plate and a second viscous plate held by the lining support plate and alternately stacked with the first viscous plate in the enclosed space. A clutch disk for a vehicle having a structure in which a driving torque is absorbed and attenuated by viscous resistance acting when the first viscous plate and the second viscous plate rotate relative to each other, wherein the housing plate is provided. At one end of the input shaft, an auxiliary shaft having a smaller outer diameter than the input shaft is provided,
The vibration damping means is achieved by a vehicle clutch disk in which the enclosed space is formed in an annular shape surrounding the periphery of an auxiliary shaft.

[0012] Further, the object of the present invention is to provide a vehicle clutch disk as described above, wherein a part of a lining support plate superimposed on the housing plate is expanded to form an annular space surrounding the auxiliary shaft. This is achieved by a clutch disk for a vehicle, wherein the annular space is formed as the sealed space for sealing a viscous fluid by providing a sealing member at a portion where the housing plate and the lining support plate overlap each other. .

[0013]

According to the above construction of the present invention, an auxiliary shaft having a smaller outer diameter than the input shaft is provided at one end of the input shaft provided with the housing plate, and the enclosed space of the vibration damping means is provided with the auxiliary shaft. It is formed in an annular shape surrounding the periphery of the shaft.
That is, the first and second viscous plates arranged in the sealed space are provided around the auxiliary shaft having an outer diameter smaller than the input shaft, and the conventional viscous plate provided on the outer peripheral portion of the input shaft. Compared to the case of a vehicle clutch disk, each viscous plate itself, which is a component of the vibration damping means, can be reduced in diameter, thereby reducing the size and weight of the vibration damping means and reducing the overall size of the vehicle clutch disk. It is possible to promote reduction in size and weight.

Further, by expanding a part of the lining support plate superimposed on the housing plate, an annular space surrounding the periphery of the auxiliary shaft is formed, and a sealing member is provided at the overlapping portion of the housing plate and the lining support plate. , The annular space is filled with a viscous fluid, so it can be filled in by simply interposing a seal ring at the circumferential overlap between the rim of the bulging portion of the lining support plate and the housing plate. The sealing of the space can be achieved, and after all, the installation position of the sealing member for obtaining the enclosed space of the vibration damping means can be reduced to only one place, thereby improving the reliability of the sealing performance and manufacturing at the same time Costs can be reduced.

[0015]

FIG. 1 shows an embodiment of a clutch disk for a vehicle according to the present invention. The vehicle clutch disc 30 of this embodiment includes a housing plate 32 fixed to one end of an input shaft 31 of a transmission, a clutch lining 33 for receiving power to be transmitted to the input shaft 31 from the engine side, and A lining support plate which holds the clutch lining 33 and is connected to the housing plate 32 so as to be rotatable relative to the housing plate 32 in both forward and reverse directions, and interposed between the housing plate 32 and the lining support plate 34; Then, a torsion spring 35 that enables torque transmission between the lining support plate 34 and the housing plate 32 is provided, and a drive torque is absorbed between the housing plate 32 and the lining support plate 34,
The vibration damping means 36 for damping is provided.

A spline 39 for locking the housing plate 32 is formed on the outer periphery of one end of the input shaft 31. Further, an insertion boss portion 42 into which one end of the input shaft 31 is spline-fitted is formed in the housing plate 32 so as to protrude. An auxiliary shaft 43 having a diameter smaller than that of the input shaft 31 is welded to the center of the insertion boss portion 42 so that the center axis is aligned with the input shaft 31.

The clutch lining 33 receives the output of the engine when pressed by a flywheel, which is the output section of the engine, by a biasing means (not shown).

The lining support plate 34 is provided with a damping means accommodating portion 45 swelled in a cylindrical shape with a bottom at the center portion. An annular space 46 surrounding the periphery of 43 is formed. By providing a seal ring 48 as a seal member at a portion where the housing plate 32 and the lining support plate 34 overlap each other, the annular space 46 becomes a sealed space 49 for sealing a viscous fluid.

The torsion spring 35 absorbs an impact in the rotational direction when the clutch lining 33 is pressed against the flywheel of the engine, and fixes the engine output (driving force) transmitted to the clutch lining 33 by the clutch lining 33. From the lining support plate 34 to the housing plate 32. Therefore, the torsion spring 35 repeatedly expands and contracts according to the magnitude of the driving force transmitted between the lining support plate 34 and the housing plate 32, and torsional vibration occurs due to output fluctuation (torque fluctuation) on the engine side or the like. Then, a relative rotational vibration is generated between the lining support plate 34 and the housing plate 32.

In order to quickly attenuate the relative rotational vibration between the lining support plate 34 and the housing plate 32, a vibration damping means 36 is provided. The vibration damping means 36 is what is called a viscous fluid coupling (a viscous coupling), and includes a sealed space 49 in which a viscous fluid such as silicone oil is sealed, and a housing plate arranged in the sealed space 49. First viscous plate 5 held on an auxiliary shaft 43 fixed to
0, and a second viscous plate 51 that is alternately stacked and arranged with the first viscous plate 50 in the enclosed space 49 and that is held in the damping means accommodating portion 45 of the lining support plate 34. Viscous plate 50
The drive torque is absorbed and attenuated (that is, the relative rotational vibration between the lining support plate 34 and the housing plate 32) by viscous resistance that acts upon the relative rotation of the second viscous plate 51 and the second viscous plate 51.

In the vehicle clutch disk 30 according to the embodiment, the auxiliary shaft 4 having a smaller diameter than the input shaft 31 is provided.
3 is additionally provided, and the enclosing space 49 of the vibration damping means 36 is formed in an annular shape surrounding the periphery of the auxiliary shaft 43. Therefore, the first and second arrays arranged in the enclosed space 49
The viscous plates 50 and 51 are provided around an auxiliary shaft 43 having an outer diameter smaller than that of the input shaft 31, which is different from the case of the conventional vehicle clutch disk provided on the outer peripheral portion of the input shaft 31. In comparison, the vibration damping means 3
The diameter of each of the viscous plates 50 and 51, which are the components of the sixth embodiment, can be reduced, thereby promoting the reduction in size and weight of the vibration damping means 36 and the reduction in size and weight of the vehicle clutch disc 30 as a whole. It becomes possible.

The annular space 46 surrounding the auxiliary shaft 43 is formed by expanding a part of the lining support plate 34 superimposed on the housing plate 32, and the space between the housing plate 32 and the lining support plate 34 is formed. Since the annular space 46 is formed as a sealed space 49 for enclosing a viscous fluid by providing a seal ring 48 in the overlapped portion, after all, the installation location of the seal member for obtaining the sealed space 49 of the vibration damping means 36 is one. It is possible to reduce only the location, thereby improving the reliability of the sealing performance and at the same time reducing the manufacturing cost.

In the above embodiment, the insertion boss portion 42 of the housing plate 32 into which the input shaft 31 is spline-fitted is bulged toward the lining support plate 34. However, as shown in FIG.
It is also possible to bulge the side opposite to the side. By doing so, it is possible to reduce the swelling length (projection length) of the damping means accommodating portion 45 in the lining support plate 34, and to further reduce the size and weight as compared with the embodiment. Becomes possible.

The vehicle clutch disc of the present invention is not limited to the configuration and the shape of each component in the above embodiment.
The lining support plate 34, the torsion spring 35, and the first and second viscous plates 50 and 51 can take various forms based on the gist of the present invention. Further, the engaging means for fixing the viscous plates 50 and 51 to the auxiliary shaft 43 and the damping means accommodating portion 45 in the rotation direction uses spline fitting in each of the above embodiments, but these connecting means are also used. It is not limited to the above embodiment.

[0025]

According to the vehicle clutch disc of the present invention, an auxiliary shaft having a smaller outer diameter than the input shaft is provided at one end of the input shaft provided with the housing plate.
The enclosed space of the vibration damping means is formed in an annular shape surrounding the auxiliary shaft. That is, the first array arranged in the enclosure space
And the second viscous plate is provided around an auxiliary shaft having an outer diameter smaller than that of the input shaft, and as compared with the case of the conventional vehicle clutch disk provided on the outer peripheral portion of the input shaft, The diameter of each viscous plate itself, which is a component of the vibration damping means, can be reduced, thereby making it possible to reduce the size and weight of the vibration damping means and to reduce the size and weight of the vehicle clutch disc as a whole. become.

Further, by expanding a part of the lining support plate superposed on the housing plate, an annular space surrounding the periphery of the auxiliary shaft is formed, and a sealing member is provided at the overlapping portion of the housing plate and the lining support plate. , The annular space is filled with a viscous fluid, so it can be filled in by simply interposing a seal ring at the circumferential overlap between the rim of the bulging portion of the lining support plate and the housing plate. The sealing of the space can be achieved, and after all, the installation position of the sealing member for obtaining the enclosed space of the vibration damping means can be reduced to only one place, thereby improving the reliability of the sealing performance and manufacturing at the same time Costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a conventional vehicle clutch disk.

[Explanation of symbols]

 Reference Signs List 30 vehicle clutch disc 31 input shaft 32 housing plate 33 clutch lining 34 lining support plate 35 torsion spring 36 vibration damping means 39 spline 43 auxiliary shaft 45 damping means accommodating part 46 annular space 48 seal ring 49 sealing space 50 first viscous plate 51 Second viscous plate

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16D 13/64 F16F 15/16

Claims (2)

(57) [Claims] 1. A housing plate fixed to an input shaft of a transmission or the like, a clutch lining for receiving power to be transmitted to the input shaft, and a clutch lining which is held and fixed to the housing plate. A lining support plate connected rotatably within an angular range, and a torsion spring interposed between the housing plate and the lining support plate to enable torque transmission between the lining support plate and the housing plate. ,
Vibration damping means interposed between the housing plate and the lining support plate to absorb and attenuate the driving torque,
The vibration damping means is provided between the housing plate and the lining support plate, and includes a sealed space in which the viscous fluid is sealed, and a first space arranged in the sealed space and held by the housing plate. And a second viscous plate that is alternately stacked and arranged with the first viscous plate in the enclosed space and that is held by the lining support plate.
Vibration resistance acting upon relative rotation between the viscous plate and the second viscous plate causes vibration absorption of the driving torque,
A vehicle clutch disc configured to attenuate, wherein one end of the input shaft provided with the housing plate is provided with an auxiliary shaft having a smaller outer diameter than the input shaft, and the vibration damping means is provided with: A clutch disk for a vehicle, wherein the enclosed space is formed in an annular shape surrounding a periphery of an auxiliary shaft. 2. An annular space surrounding the auxiliary shaft is formed by expanding a part of the lining support plate superimposed on the housing plate, and an overlapping portion between the housing plate and the lining support plate. The vehicle clutch disk according to claim 1, wherein the annular space is formed as the sealed space that seals a viscous fluid by equipping a seal member.