JPH11257432A - Torque transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque transmission device to provide an excellent damping power by positively utilizing friction of the slide part of a seal member. SOLUTION: A first inertia body 2 coupled to a drive shaft 1 and a second inertia body 3 relatively rotatably supported at the first inertia body 2 are interlinked through a twist damper 4. A closed space 41 is formed between the first and second inertia bodies 2 and 3, the twist damper 4 is arranged in the closed space 41, and sealed with fluid. A seal member 40 having the outer peripheral side fixed on the inner peripheral side in a second inertia body 3 and the outer peripheral side making slide contact with the first inertia body 2 is arranged in the closed space 41. A frictional member 43 to exert frictional resistance on relative rotation between the seal member 40 and the first inertia body 2 is arranged between the seal member 40 and the first inertia body 2 with which the slide side of the seal member 40 makes slide contact with the seal member 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque transmission device provided for an internal combustion engine, and more particularly to a torque transmission device having two inertia bodies, which are connected via a torsional damper. The present invention relates to a torque transmission device.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. Sho 63-254248 discloses a torque transmitting device of this type which includes a first inertial body connected to a drive shaft and a rotatable support relative to the first inertial body. A torque transmission device in which a closed space is formed between the first inertia body and the second inertia body, wherein the closed space is formed between the first inertia body and the second inertia body. A torque transmission device in which a torsional damper is arranged in a space and a fluid is sealed is shown.

In the closed space of the torque transmission device, there is provided an annular seal member whose inner peripheral side is fixed to the second inertial body and whose outer peripheral side is in sliding contact with the first inertial body. The fluid inside is sealed.

That is, since the first inertial body and the second inertial body of the torque transmitting device relatively rotate within the elastic range of the torsional damper, a portion that slides on the first inertial body on the outer peripheral side of the seal member. Performs a sealing action to seal off the fluid in the closed space.

[0005]

In general, in this type of torque transmitting device, it is desired to obtain a damping effect as well as a vibration absorbing effect with respect to a vibration superimposed on the transmitted torque. The sealing member is
Although the outer peripheral side slides on the first inertial body to perform a sealing function, there is no particular consideration on obtaining a friction damping effect by effectively utilizing the friction at the sliding contact portion.

The present invention has been devised in view of the above-mentioned conventional circumstances, and a torque transmission device capable of exhibiting excellent damping performance by positively utilizing the friction of a sliding contact portion of a seal member. The purpose is to provide.

[0007]

SUMMARY OF THE INVENTION In view of the above, the first aspect of the present invention provides a first inertial body connected to a drive shaft and a second inertial body supported to be rotatable relative to the first inertial body. Between the first inertial body and the second inertial body, wherein the closed space is formed between the first inertial body and the second inertial body. In a torque transmission device in which a damper is arranged and a fluid is sealed, an inner peripheral side is fixed to one of a first inertia body and a second inertia body in the closed space, and an outer peripheral side is fixed to one of the inertia bodies. A substantially annular seal member is provided for slidingly contacting the other inertial body and sealing the fluid at the sliding contact portion, and the seal member and a first inertial body or a second inertial body which is in sliding contact with the outer peripheral side of the seal member. Between the seal member and the first or second inertial body. It is the structure in which a friction member to provide frictional resistance to the rotation.

According to a second aspect of the present invention, in the configuration of the first aspect, the friction member is provided radially inward of a sliding portion of the seal member. .

According to a third aspect of the present invention, in the configuration of the first aspect of the present invention, the first or second inertial body with which the outer peripheral side of the seal member slides is more radially than the seal member. It is configured such that a stepped portion projecting toward the inside of the closed space is formed on the outside.

According to a fourth aspect of the present invention, in the configuration of the first aspect, the friction member includes a spring member for pressing the friction member against the first inertial body or the second inertial body. It has a configuration that does.

Here, the friction member is preferably attached integrally to the seal member. Further, a viscous fluid such as grease is selected as the fluid sealed in the closed space.

In such a configuration, the torque applied to the drive shaft is input to a first inertia body connected to the drive shaft, and the second inertia body is connected to the second inertia body via a torsional damper.
It is transmitted to the inertial body. At this time, while the torsional damper arranged in the closed space exerts a vibration absorbing action, the fluid in the closed space can lubricate each component of the torsional damper, and this fluid is sealed by a seal member. Is done. Also,
The friction member exerts a frictional force on the relative rotation between the first inertial body and the second inertial body, and exhibits a friction damping ability.

That is, the sealing by the sealing member is performed in the first
Since the inertial body and the second inertial body relatively rotate within the range of elasticity of the torsional damper, a portion (sliding contact portion) on the outer peripheral side of the seal member that comes into sliding contact with the first inertial body or the second inertial body. It acts as a seal to seal off the fluid in the enclosed space.

More specifically, the fluid in the closed space is the first fluid.
In a state where the inertial body and the second inertial body are rotating, the outer peripheral side of the sealing member is located at the outermost peripheral side in the closed space due to centrifugal force and does not reach a portion where the outer peripheral side of the seal member is in sliding contact with the inertial body,
When the rotation of the first inertial body and the second inertial body stops, a part of the fluid having a large potential energy starts to move in the closed space due to gravity, and reaches the sliding contact portion of the seal member during this movement. In this case, the sliding contact portion is sealed by the sealing action.

The friction caused by the friction member is such that the first inertial body and the second inertial body relatively rotate within a range of elasticity of the torsional damper. , And frictionally slid against the first inertial body or the second inertial body, thereby exhibiting a friction damping ability.

Therefore, a torque transmission device capable of exhibiting excellent damping ability by positively utilizing the friction of the sliding contact portion of the seal member is obtained.

According to the second aspect of the present invention, since the friction member is provided radially inward of the sliding portion of the seal member, the fluid in the sealed space is not slid by the seal member. The frictional member is sealed at the contact portion and does not flow into the contact portion of the friction member, so that the friction member can exhibit a stable friction damping ability.

According to the third aspect of the present invention, the first inertial body or the second inertial body with which the outer peripheral side of the seal member slides.
The inertial body has a stepped portion located radially outward from the seal member and protruding toward the inside of the sealed space, so that rotation of the first inertial body and the second inertial body is prevented. When stopped, the fluid on the outermost peripheral side of the sealed space started to move by gravity, and when approaching the sliding contact portion of the seal member, the fluid was formed at a position radially outward from the seal member. It is dropped from the stepped portion and reaches the position where the potential energy is the smallest. Therefore, the fluid is effectively prevented from reaching the sliding contact portion of the seal member, so that the fluid does not flow into the contact portion of the friction member, and the friction member can exhibit a stable friction damping ability. .

Further, in the invention described in claim 4, the friction member includes a first inertia member or a second inertia member.
Since the spring member for pressing the inertial body is provided, the friction member is pressed by the spring force of the spring member and comes into frictional contact, so that a stable friction damping ability can be exhibited.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a torque transmitting device according to an embodiment of the present invention, and is a sectional view taken along the line AOA of FIG. 2, and FIG. 2 is a sectional view of the torque transmitting device shown in FIG. FIG. 3 is a partially enlarged plan view showing the main part of FIG. 1.

In FIG. 1, reference numeral 1 denotes a drive shaft, that is, a crankshaft of an internal combustion engine, and 2 denotes a first inertial body.
Are connected to the drive shaft 1 by bolts not shown. 3
Is a second inertia body rotatably supported by the first inertia body 2, and the second inertia body 3 can be connected to a clutch device (not shown). Reference numeral 4 denotes a torsional damper that connects the first inertial body 2 and the second inertial body 3 to each other.

The first inertial body 2 has a recess 8 formed on the side facing the second inertial body 3, thereby forming an inner peripheral rib 9 and an outer peripheral rib 10. An annular inertia body 12 is integrally attached to the outer peripheral rib 10 on the second inertia body 3 side by a pin 11. The annular inertial body 12 forms a part of the first inertial body 2 by being attached to the first inertial body 2, and has a recess 8.
Cover a part of the outer peripheral side. The first inertial body 2
A ring gear 13 is fixed to the outer peripheral side by shrink fitting.

The second inertia body 3 is formed in a substantially annular plate shape, and its inner peripheral side is supported by a bearing 17 attached to the outer periphery of the inner peripheral side rib 9 of the first inertial body 2, It is pivotable with respect to the body 2.

The second inertial body 3 has a clutch sliding surface 1 with which a clutch disk of a clutch device (not shown) contacts.
8 are formed.

The torsion damper 4 connecting the first inertial body 2 and the second inertial body 3 is provided facing the depression 8 of the first inertial body 2, and includes a damper hub 26 and a damper hub 26. 26, a pair of drive plates 27 disposed on both sides of the drive plate 26, the damper hub 26 and the drive plate 27.
Windows 28, 2 formed at positions corresponding to
9, the damper hub 26 and the drive plate 2
And a compression spring 30 which elastically connects the first spring 7 and the second spring 7 so as to be relatively rotatable.

The damper hub 26 is formed of an annular plate member, has a plurality of windows 28 formed therein, and has inner teeth 32 for accommodating a block-shaped friction material 31 on the inner peripheral side, and has outer teeth on the outer peripheral side. A plurality of projections 33 extending radially outward are formed.

The damper hub 26 is resilient to the first inertial body 2 via an arc-shaped coil spring 35 provided between a spring support 34 attached to the first inertial body 2 and the projection 33. It is mounted so as to be relatively rotatable.

Windows 29 are respectively formed on the pair of drive plates 27 so as to correspond to the windows 28 formed on the damper hub 26. These drive plates 27 are integrated with each other via rivet pins 36. In addition, the rivet pin 36 is fixed to the second inertial body 3 to be integrally connected to the second inertial body 3. The rivet pin 36 can be engaged with the window 28 formed in the damper hub 26 with a predetermined play angle in the torsional direction of the torsional damper 4.

The plurality of windows 27 formed in the drive plate 27 have different window widths (dimensions in the circumferential direction) with respect to the windows 28 of the damper hub 26 so that the torsion damper 4 can be used. The multi-stage torsional characteristic is given to the torsional characteristic of the above.

The compression springs 30 are accommodated one by one in corresponding windows 28, 29, as best shown in FIG. Further, the compression spring 30 is provided in the window 2 having a small window width.
8, both ends are accommodated in a state where they do not contact the window 29 of the drive plate 27, that is, with a predetermined play angle.

In the torsion damper 4, the damper hub 26 is connected to the first inertia body via the coil spring 35 and the drive plate 27 is connected to the second inertia body 3.
The first inertial body 2 and the second inertial body 3 are connected so as to be elastically relatively rotatable. When the first inertial body 2 and the second inertial body 3 rotate relative to each other, the coil spring 35 and the compression spring 30 of the torsion damper 4 act in series.

Reference numeral 40 denotes a substantially annular seal member. The inner peripheral side of the seal member 40 is fixed to the second inertial body 3 in this embodiment, and the outer peripheral side is in sliding contact with the first inertial body 2. More specifically, the seal member 40 is formed of a predetermined elastic material such as a metal plate, the inner peripheral side is sandwiched between the second inertial body 3 and the drive plate 27, and the outer peripheral side is
The annular inertial body 12 attached to the inertial body 2 is in contact with its own elastic force.

The inside of the depression 8 is sealed by the sealing member 40, thereby forming a sealed space 41 between the first inertial body 2 and the second inertial body 3.

The closed space 41 is filled with a predetermined fluid, for example, grease, so as not to fill the closed space 41. In addition, the closed space 41
Inside, the torsional damper 4 is housed and arranged.

Further, the first inertial body 2, that is, the annular inertial body 12, on which the outer peripheral side of the seal member 40 slides, is located radially outward from the seal member 40 toward the inside of the sealed space 41. A projecting stepped portion 42 is formed.

The seal member 40 and the seal member 40
A friction member 43 for providing frictional resistance to relative rotation between the seal member 40 and the first inertia body 2 is provided between the first inertia body 2 (the annular inertia body 12) and the first inertia body 2 which slides.

The friction member 43 is formed in an annular shape and is attached to the seal member 40. The attachment position of the friction member 43 is the first inertial body 2 (the annular inertial body 12) on the outer peripheral side of the seal member 40.
Is provided radially inward of a sliding contact portion that contacts the sliding surface.

The friction member 43 has the inner peripheral side of the seal member 40 fixed to the second inertial body 3 and the outer peripheral side of the first inertial body 2
Therefore, when the first inertial body 2 and the second inertial body 3 relatively rotate within the elasticity range of the torsional damper 4, they slide frictionally. In this case, the friction member 43
Is pressed against the first inertial body 2 (annular inertial body 12) by the spring force of the seal member 40.

Reference numerals 44 and 45 denote retainers disposed on both sides of the friction material 31, respectively. These retainers 44 and 45 are engaged with the pair of drive plates 27 while being in contact with the friction material 31. While the retainer 44 is engaged with the drive plate 27 at a predetermined play angle, a bent tongue 46 is formed, and the bent tongue 46 is fitted into an engagement hole 47 formed in the first inertial body 2. Is engaged.

A disc spring 48 is disposed between the retainer 44 and the first inertial body 2, and presses the friction material 31 toward the second inertial body 3 via the retainer 44. by this,
The friction material 31 can exhibit a friction damping ability when a relative rotation occurs between the first inertial body 2 and the second inertial body 3.

In such a configuration, the torque applied to the drive shaft 1 is input to the first inertial body 2 connected to the drive shaft 1, and from the first inertial body 2 via the torsion damper 4. The power is transmitted to the second inertial body 3. Specifically, since the damper hub 26 of the torsion damper 4 is connected to the first inertia body 2 via the coil spring 35 and the drive plate 27 is connected to the second inertia body 3 via the rivet pin 36, The torque input to the first inertia body 2 is
5, transmitted to the second inertia body 3 via the damper hub 26 of the torsion damper 4, the compression spring 30, and the drive plate 27.

At this time, the coil spring 35 and the torsion damper 4 arranged in the closed space 41 exhibit a vibration absorbing action, and the friction material 31 exhibits a friction damping action. Each component of the torsional damper 4 can be lubricated, and this fluid is sealed by the seal member 40. Further, the friction member exerts a frictional force on the relative rotation between the first inertial body and the second inertial body, and exhibits a friction damping ability.

When the coil spring 35 and the torsion damper 4 exhibit a vibration absorbing action, the coil spring 35 is
9 acts in series with the compression spring 30 housed in the housing 9, has a small spring constant, performs a vibration absorbing action with a long deflection amplitude, and has a compression spring housed in the windows 28 and 29.
0 acts in parallel to obtain proper torsional elasticity. In addition, the friction material 31 frictionally slides between the retainers 44 and 45 to exhibit a damping action.

Since the first inertial body 2 and the second inertial body 3 are relatively rotated within the elastic range of the torsional damper 4, the sealing by the seal member 40 is performed.
The portion (sliding contact portion) that comes into sliding contact with the inertial body 2 (the annular inertial body 12) performs a sealing action, and seals the fluid in the closed space 41.

More specifically, the fluid in the closed space 41 is
In a state where the first inertial body 2 and the second inertial body 3 are rotating, the outer peripheral side of the sealing member 40 is located on the outermost peripheral side in the sealed space 41 due to centrifugal force, and the first inertial body 2 (the annular inertial body 12) When the rotation of the first inertial body 2 and the second inertial body 3 is stopped, although the portion does not reach the portion in sliding contact with the fluid, a part of the fluid having a large potential energy starts to move in the closed space 41 due to gravity. During the movement, the sealing member 40
Is reached by the sealing action of the sliding contact portion.

Also, the friction caused by the friction member 43 causes the first inertial body 2 and the second inertial body 3 to relatively rotate within the elasticity of the torsion damper 4, so that the friction member 43 is moved by the first inertial body. 2 (annular inertia body 12), and is obtained by frictionally sliding with respect to the first inertia body 2,
It will exhibit the friction damping ability.

Accordingly, a torque transmission device capable of exhibiting excellent damping performance by positively utilizing the friction of the sliding contact portion of the seal member 40 is obtained.

Further, the friction member 43 includes a seal member 4
Since the fluid in the sealed space 41 is sealed at the sliding contact portion of the seal member 40 and does not flow into the contact portion of the friction member 43, For this reason, the friction member 43 can exhibit a stable friction damping ability.

Further, the first inertial body 2 (annular inertial body 12) with which the outer peripheral side of the seal member 40 slides is located radially outward from the seal member 40 and faces the inside of the sealed space 41. Since the stepped portion 42 is formed to protrude, the rotation of the first inertial body 2 and the second inertial body 3 is stopped,
When the fluid existing on the outermost peripheral side of the closed space 41 starts moving due to gravity and approaches the sliding contact portion of the seal member 40, the fluid is formed at a position radially outward of the seal member 40. The liquid drops from the stepped portion 42 and reaches the position where the potential energy is the smallest. For this reason, the fluid is effectively prevented from reaching the sliding contact portion of the seal member 40, so that the fluid does not flow into the contact portion of the friction member 43, and the friction member 43 exhibits a stable friction damping ability. be able to.

FIG. 4 is a drawing showing another embodiment of the present invention. This embodiment is different from the above embodiment in that the friction member 43 is attached to the first inertial body 2 ( The point is that a spring member 50 for pressing the annular inertial body 12) is attached.

That is, a spring member 50 is provided between the drive plate 27 integrally connected to the second inertial body 3 and the seal member 40. The spring member 50 is a frusto-conical disc spring in this embodiment. The inner peripheral side is in contact with the drive plate 27 and the outer peripheral side is the friction member 4.
3 and is in contact with the seal member 40 and presses the friction member 43 against the first inertial body 2 (the annular inertial body 12).

Since other configurations are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals, and redundant description will be omitted.

According to such a configuration, the friction member 43
Is pressed against the first inertial body 2 (the annular inertial body 12) by the spring force of the spring member 50 together with the spring force of the seal member 40. Therefore, the friction caused by the friction member 43 causes the friction member 43 to be pressed by the spring force of the seal member 40 and the spring member 50 to come into contact with the first inertial body (the annular inertial body 12), and the first inertial body 2 , Thereby exerting a friction damping ability.

Therefore, as in the above-described embodiment, a torque transmission device capable of exhibiting excellent damping performance by positively utilizing the friction of the sliding contact portion of the seal member 40 is obtained. In addition, the friction member 43 is
It is pressed by a spring force of 0 and comes into frictional contact, thereby exhibiting stable friction damping ability.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment, and can be changed without departing from the gist of the invention.
For example, although the embodiment in which the drive plate 27 of the torsion damper 4 is disposed on both sides of the damper hub 26 has been described, a configuration in which the drive plate 27 is disposed on only one side may be employed.

[0057]

As described above in detail, according to the present invention, a torque transmission device capable of exhibiting excellent damping performance by positively utilizing the friction of the sliding contact portion of the seal member. Is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a torque transmission device according to an embodiment of the present invention, taken along line AOA of FIG.

FIG. 2 is a partial plan view in which a part of the torque transmission device shown in FIG. 1 is cut away.

FIG. 3 is an enlarged view showing a main part of FIG. 1;

FIG. 4 is a view similar to FIG. 3, showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive shaft 2 1st inertia body 3 2nd inertia body 4 Torsional damper 40 Seal member 41 Sealed space 43 Friction member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16F 15/134 F16F 15/134 B 15/139 15/139 B (72) Inventor Daisuke Shibata 1370 Onna, Atsugi-shi, Kanagawa Shares (72) Inventor Masato Ichinose 1370 Onna, Atsugi, Kanagawa Prefecture

Claims (4)

[Claims] 1. A first inertial body connected to a drive shaft and a second inertial body supported to be rotatable relative to the first inertial body are connected to each other via a torsion damper. A torque transmission device comprising: a sealed space formed between the first inertial body and the second inertial body; a torsional damper disposed in the sealed space; and a fluid sealed therein. In the device, in the closed space, the inner peripheral side is fixed to one of the first inertial body and the second inertial body, and the outer peripheral side is in sliding contact with the other inertial body, and the sliding contact portion is provided. A substantially annular seal member for sealing a fluid is provided, and between the seal member and the first inertial body or the second inertial body in which the outer peripheral side of the seal member slides, a seal member and the first inertial body or the second inertial body are provided. The provision of a friction member that gives frictional resistance to relative rotation with the inertial body Characterized by a torque transmission device. 2. The torque transmission device according to claim 1, wherein the friction member is provided radially inward of a sliding portion of the seal member. 3. A first sliding member in which the outer peripheral side of the seal member is in sliding contact
2. The inertial body or the second inertial body is formed with a stepped portion that is located radially outward of the seal member and protrudes toward the inside of the sealed space. 3.
The torque transmission device according to any one of the preceding claims. 4. The friction member includes a first friction member.
2. The torque transmission device according to claim 1, further comprising a spring member for pressing the inertial body or the second inertial body.