JP2021156316A - Damper device - Google Patents

Abstract

To provide a damper device which is suppressed in the generation of noise.SOLUTION: A damper device 1 comprises: a first rotating body rotating around a rotating shaft (O); a second rotating body 200 relatively rotating with respect to the first rotating body; a third rotating body 300 relatively rotating with respect to the first rotating body and the second rotating body; a first elastic mechanism part 400 for elastically connecting the first rotating body and the second rotating body; a second elastic mechanism part 500 for elastically connecting the second rotating body and the third rotating body; and an intermediate part 600 having a main body part, an extension part extending from the main body part in an axial direction, and an elastic part extending from the extension part by a prescribed angle, and arranged in an engagement space which is formed between first tooth faces of first engagement teeth 202 of the second rotating body, and second tooth faces of second engagement teeth 302 of the third rotating body.SELECTED DRAWING: Figure 1

Description

The technology disclosed in this application relates to a damper device.

In a vehicle or the like, a damper device is provided on a torque transmission path between a drive source such as an engine and a transmission to absorb vibration of torque transmitted from the drive source toward the transmission. The damper device is incorporated in, for example, a clutch device.

As a general configuration of a damper device, a coil spring is interposed between a disc plate as an input member that can rotate relative to each other and a hub as an output member, and torque fluctuation is caused based on the elastic deformation of the coil spring. A technique for absorbing and attenuating is known.

As a specific configuration of the damper device, for example, in Patent Document 1, a first damper portion and a second damper portion arranged radially inside the first damper portion are provided, and hubs are provided as an inner hub and an outer hub. A split hub type damper device that splits into hubs is disclosed.

Further, in Patent Document 2, a cushioning material is provided between the hub 10 and the hub plate 11 (between the engaging tooth 18 and the engaged tooth 19), which are two coaxial bodies that can rotate relatively. A technique for providing a crown-shaped insert 20 comprising the above is disclosed.

Japanese Patent No. 5376061 Special Table No. 9-506159

The split hub type damper device described in Patent Document 1 generally has a torsional characteristic as shown in FIG. FIG. 13 is a schematic characteristic diagram schematically showing the torsional characteristics of the split hub type damper device. That is, the split hub type damper device described in Patent Document 1 has a pre-damper region X that absorbs torque fluctuations by a second damper portion between _{a torsion angle −θ 1 to} θ _{1 , and a torsion angle θ 1} or more and a torsion angle. It is composed of a main damper region Y that absorbs torque fluctuations by the first damper portion in a region of −θ _{1 or less.} In the pre-damper area X, the inner hub and the outer hub rotate relative to each other to absorb small torque fluctuations, and in the main damper area Y, the disc plate and the hub (the inner hub and the outer hub rotate integrally) are relative to each other. It absorbs large torque fluctuations by rotating.

However, as shown in FIG. 13, in the split hub type damper device, a large step W is generated on the characteristic diagram at _{the twist angles θ 1} and −θ _{1 transitioning from the pre-damper region X to the main damper region Y.} It ends up. This step W has the elastic modulus (characteristics) of the elastic mechanism (corresponding to the first damper portion in Patent Document 1) that elastically connects the disc plate and the outer hub, and the elastic mechanism (the elastic mechanism) that elastically connects the outer hub and the inner hub. This is due to the existence of a large gap in the elastic modulus (characteristics) of the second damper portion (corresponding to the second damper portion in Patent Document 1) and the generation of hysteresis torque in the damper device, particularly in the pre-damper region X and the main damper region Y. In such a case, there is a problem that an abnormal noise is generated each time the inner hub and the outer hub come into contact with each other at _{the twist angles θ 1} and −θ _1.

In order to solve such a problem, as described in Patent Document 2, it has been proposed to provide a cushioning material between two coaxial bodies that can rotate relatively. However, even if such a cushioning material is provided between the inner hub and the outer hub, if a material having a low elastic modulus is used as the cushioning material, the cushioning material operating region Z that absorbs torque fluctuations by the cushioning material. A step W still remains between the main damper region Y and the main damper region Y (see FIG. 14). On the contrary, if a material having a large elastic modulus is used as the cushioning material, the difference between the characteristics of the pre-damper region X and the characteristics of the cushioning material operating region Z becomes large, and as a result, as shown in FIG. 15, both are used. A sharp bend (step W') occurs due to the difference in the characteristics of. Therefore, even in the technique described in Patent Document 2, there still arises a problem that an abnormal noise is generated when the inner hub and the outer hub come into contact with each other. Note that FIG. 14 is a schematic characteristic diagram schematically showing the torsional characteristics of a damper device provided with a cushioning material having a low elastic modulus between the inner hub and the outer hub. FIG. 15 is a schematic characteristic diagram schematically showing the torsional characteristics of a damper device provided with a cushioning material having a high elastic modulus between the inner hub and the outer hub.

Therefore, various embodiments are provided to provide a damper device in which the generation of abnormal noise is suppressed.

The damper device according to one embodiment includes a first rotating body that rotates around a rotation axis, a second rotating body that rotates relative to the first rotating body around the rotating axis, the first rotating body around the rotating axis, and the like. A third rotating body that rotates relative to the second rotating body, a first elastic mechanism that elastically connects the first rotating body and the second rotating body in the rotational direction, the second rotating body and the third rotation. A second elastic mechanism portion that elastically connects the body in the rotational direction, a main body portion that exhibits a circular outer diameter centered on the rotation axis, an extension portion that extends axially from the main body portion, and the above. It extends from the extending portion at a predetermined angle and is formed between the first tooth surface of the first meshing tooth of the second rotating body and the second tooth surface of the second meshing tooth of the third rotating body. An intermediate body having an elastic portion arranged in the meshing space and elastically deforming in the rotational direction is provided, and the predetermined angle is formed by the first tooth bottom of the first meshing tooth and the first tooth surface. It is set to be smaller than the first angle or the second angle formed by the second tooth bottom of the second meshing tooth and the second tooth surface.

According to this configuration, it is arranged in the meshing space formed between the first tooth surface of the first meshing tooth of the second rotating body and the second tooth surface of the second meshing tooth of the third rotating body, and is arranged in the rotation direction. Since an intermediate body having an elastic portion that elastically deforms is provided in the body, the step on the characteristic diagram, which has been a problem in the past, is minimized, and the pre-damper region based on the third rotating body to the main damper region based on the second rotating body are provided. Can be smoothly transitioned to. Further, as a result, in the damper device of one aspect, it is possible to suppress abnormal noise that may occur when the second rotating body and the third rotating body come into contact with each other.

Further, in the damper device according to one aspect, it is preferable that the elastic portion has an arc shape.

With this configuration, it is possible to minimize the above-mentioned step more efficiently. This makes it possible to more efficiently suppress abnormal noise that may occur when the second rotating body and the third rotating body come into contact with each other in the damper device of one aspect.

Further, in the damper device according to one aspect, the elastic portion is the first meshing space in which the first tooth surface and the second tooth surface mesh in the forward rotation direction, and the first tooth in the meshing space. It may be arranged only in either one of the surface and the second meshing space in which the second tooth surface meshes in the negative rotation direction.

With this configuration, in the damper device according to one aspect, the second rotating body and the third rotation in either the forward rotation direction (twist in the forward rotation direction) or the negative rotation direction (twist in the negative rotation direction). When an abnormal noise is generated when the body comes into contact with the body, it is possible to efficiently suppress the abnormal noise only in one of the positive rotation direction and the negative rotation direction while reducing the cost. Further, as a result, in the damper device according to one aspect, it is possible to prevent the target twist angle of the pre-damper region from being reduced more than necessary (conversely, while maximizing the target twist angle of the pre-damper region, as described above. Steps can be minimized).

Further, in the damper device according to one aspect, it is preferable that the intermediate body is supported by the third rotating body.

With this configuration, in the damper device according to one aspect, it is possible to adopt a configuration in which the intermediate body is sandwiched between the inner hub and another member, and the other member is a hysteresis torque generating member. By adjusting the size (diameter) of the main body portion described above, it is possible to secure a large sliding surface between the hysteresis torque generating member and the main body portion. As a result, it is possible to reduce the amount of wear of the hysteresis torque generating member, and further, it is possible to stabilize the hysteresis torque characteristic developed by the hysteresis torque generating member.

Further, in the damper device according to one aspect, it is preferable that the inner diameter of the intermediate has a substantially track shape.

With this configuration, when the intermediate is rotated by a certain angle in the forward rotation direction or the negative rotation direction, the inner diameter of the substantially track shape of the intermediate can be efficiently supported by the inner hub.

According to various embodiments, it is possible to provide a damper device in which the generation of abnormal noise is suppressed.

It is a schematic top view which shows typically the structure of the damper device which concerns on one Embodiment. It is schematic cross-sectional view which shows typically the structure of the damper apparatus shown in FIG. 1 as seen from the line AA'. It is a schematic perspective view which shows the 2nd rotating body, the 3rd rotating body, and the intermediate body enlarged in the damper device shown in FIG. Of the damper devices shown in FIG. 1, the second rotating body, the third rotating body, and the intermediate body are enlarged and shown in a schematic top view. Of the damper devices shown in FIG. 1, it is a schematic perspective view showing an enlarged intermediate body. Among the damper devices shown in FIG. 1, the meshing space formed between the first tooth surface of the first meshing tooth of the second rotating body and the second tooth surface of the second meshing tooth of the third rotating body is expanded. It is a schematic perspective view shown by. It is a schematic cross-sectional view which shows the 3rd rotating body, the intermediate body, and the hysteresis generating member enlarged in the damper device which concerns on one Embodiment. Among the damper devices shown in FIG. 1, the second rotating body, the third rotating body, and the intermediate body are enlarged in a state where the second rotating body and the third rotating body do not rotate relative to each other and the twist angle is 0 °. It is a schematic diagram which shows. Among the damper devices shown in FIG. 1, the second rotating body, the third rotating body, and the intermediate body in the state where the second rotating body and the third rotating body rotate relative to each other and have a twist angle α _{1 are enlarged.} It is a schematic diagram which shows. Among the damper devices shown in FIG. 1, the second rotating body, the third rotating body, and the intermediate body in the state where the second rotating body and the third rotating body rotate relative to each other and have a twist angle α _{2 are enlarged.} It is a schematic diagram which shows. Of the damper device shown in FIG. 1, a second rotary member and the third rotating member is in the state of the twist angle alpha ₃ relative rotation, the second rotor, third rotating member, and an enlarged intermediate It is a schematic diagram which shows. Of the damper device shown in FIG. 1, a second rotary member and the third rotating member is in the state of the torsional angle alpha ₄ relative rotation, the second rotor, third rotating member, and an enlarged intermediate It is a schematic diagram which shows. Of the damper device shown in FIG. 1, a second rotary member and the third rotating member is in the state of the twist angle alpha ₅ relative rotation, the second rotor, third rotating member, and an enlarged intermediate It is a schematic diagram which shows. It is a schematic characteristic diagram which shows typically the torsional characteristic which a damper device which concerns on one Embodiment has. Of the schematic characteristic diagram of FIG. 9, it is a schematic characteristic diagram showing only the portion surrounded by a square in an enlarged manner. It is a schematic top view which shows typically the structure of the damper device which concerns on 2nd Embodiment. It is a schematic top view which shows typically the structure of the damper device which concerns on 3rd Embodiment. It is a schematic characteristic diagram which shows typically the torsional characteristic which a general conventional split hub type damper device has. It is a schematic characteristic diagram which shows typically the torsional characteristic which a damper device which provided the cushioning material with low elastic modulus between the inner hub and the outer hub. It is a schematic characteristic diagram which shows typically the torsional characteristic which a damper device which provided the cushioning material with high elastic modulus between the inner hub and the outer hub.

Hereinafter, various embodiments will be described with reference to the accompanying drawings. The same reference numerals are given to the common constituent requirements in the drawings. It should also be noted that the components represented in one drawing may be omitted in another for convenience of explanation. Furthermore, it should be noted that the attached drawings are not always drawn to the correct scale.

1. 1. Outline of the overall configuration of a damper device according to the configuration an embodiment of the damper device will be described with reference to FIGS. FIG. 1 is a schematic top view schematically showing the configuration of the damper device 1 according to the embodiment. FIG. 2 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 shown in FIG. 1 as viewed from the line AA'. FIG. 3 is a schematic perspective view showing an enlarged view of the second rotating body 200, the third rotating body 300, and the intermediate body 600 among the damper devices 1 shown in FIG. FIG. 4 is a schematic top view showing an enlarged view of the second rotating body 200, the third rotating body 300, and the intermediate body 600 among the damper devices 1 shown in FIG. FIG. 5 is a schematic perspective view showing an enlarged intermediate body 600 of the damper device 1 shown in FIG. FIG. 6 shows, among the damper devices 1 shown in FIG. 1, the first tooth surface 203 of the first meshing tooth 202 of the second rotating body 200 and the second tooth surface 303 of the second meshing tooth 302 of the third rotating body 300. It is a schematic perspective view which shows the meshing space P formed between FIG. 7 is a schematic cross-sectional view showing an enlarged view of the third rotating body 300, the intermediate body 600, and the hysteresis generating member 700 in the damper device 1 according to the embodiment. It should be noted that in FIG. 1, the description of the first rotating body 100 is omitted for convenience of drawing.

The damper device 1 according to one embodiment is provided on a power transmission path such as a drive source (not shown) such as an engine or a motor and a transmission (not shown), and the power from the drive source is a flywheel (not shown). The power is transmitted (output) to a transmission or the like by being transmitted via (not shown).

The damper device 1 absorbs and attenuates torque vibration. As shown in FIGS. 1 to 3, the damper device 1 includes a disk plate 100 as a first rotating body, an outer hub 200 as a second rotating body, an inner hub 300 as a third rotating body, and a first elastic mechanism. The portion 400, the second elastic mechanism portion 500, and the intermediate body 600 are mainly included. In addition to these components, the damper device 1 also includes various other components. Hereinafter, details of each component constituting the damper device 1 will be described. In the present specification, the axial direction means a direction extending parallel to the rotation axis O, the radial direction means the radial direction of each rotating body orthogonal to the rotation axis O, and the circumferential direction means rotation. It shall mean the direction of orbiting around the axis O.

1-1. Disc plate 100 (first rotating body 100)
The disc plate 100 transmits power from the drive source via the lining plate 10, and can be regarded as a component to which power is input in the damper device 1 together with the lining plate 10. The lining plate 10 is attached with facings 20A and 20B, and the facings 20A and 20B are configured to be sandwiched between the flywheel and the pressure plate (not shown). As for the shape and material of the lining plate 10 and the pressure plate, known ones can be used.

The disc plate 100 is formed of, for example, a metal material, and is rotatably provided around a rotation shaft O with an outer hub 200 or the like, which will be described later, interposed therebetween, as shown in FIG. The disc plate 100 includes a first disc plate 100A and a second disc plate 100B as a pair of plate members provided on both sides of the outer hub 200 in the axial direction.

The second disc plate 100B is arranged so as to face the first disc plate 100A in the axial direction. As shown in FIG. 2, the first disc plate 100A and the second disc plate 100B can rotate integrally by being integrally fixed together with the lining plate 10 by the rivet R so as to sandwich the lining plate 10 in between. .. With such a configuration, the power transmitted from the flywheel to the lining plate 10 is transmitted to the first disc plate 100A and the second disc plate 100B.

Further, as shown in FIG. 2, the first disc plate 100A and the second disc plate 100B have a shape that bulges in the axial direction in a predetermined radial position as compared with other radial positions, and will be described later. An accommodating portion 105 for accommodating the first elastic mechanism portion 400 is formed. The accommodating portion 105 is associated with each of the regions I to IV in order to accommodate the first elastic mechanism portion 400 extending along the circumferential direction of the disc plate 100 (first disc plate 100A and second disc plate 100B). , Extends in a substantially straight line or a substantially arc shape along the circumferential direction of the disc plate 100. The regions I to IV refer to four regions in which each of the accommodating portions 105 has a fan shape of approximately 90 degrees when the damper device 1 is viewed from the upper surface. The outer hub 200, which will be described later, is provided with notches 201a, 201b, 201c, and 201d having shapes corresponding to these accommodating portions 105.

The disc plate 100 (first disc plate 100A and second disc plate 100B) is appropriately combined with a conventionally known structure in addition to the above-described configuration to exhibit a function as a part of the damper device 1. Can be done. The detailed description of the conventionally known structure will be omitted.

1-2. Outer hub 200 (second rotating body 200)
The outer hub 200 is made of, for example, a metal material and has a substantially annular shape as a whole, as shown in FIGS. 1, 3, and 4. Further, as described above, the outer hub 200 is sandwiched between the first disc plate 100A and the second disc plate 100B, and the disc plate 100 (the first disc plate 100A and the first disc plate 100A and It is provided so as to be rotatable relative to the second disc plate 100B). Furthermore, the outer hub 200 has a flange 206 extending radially outward, and a ring hole for accommodating at least the inner hub 300, the second elastic mechanism portion 500, and the intermediate body 600 described later (for convenience, reference numerals are attached to the drawings. Not done) is formed.

As shown in FIGS. 1, 3, and 4, the flange 206 is formed with at least one notch along the circumferential direction on the outer periphery thereof. In one embodiment, as an example, the flange 206 is formed with four notches 201a, 201b, 201c, and 201d at equal intervals (90 degree intervals in the circumferential direction) along the circumferential direction on the outer periphery thereof. As shown in FIG. 1, conceptually, when the damper device 1 is viewed from the upper surface and divided into four regions I, II, III, and IV, each of which has a fan shape, the flange 206 is divided into regions I to IV. The first notch 201a, the second notch 201b, the third notch 201c, and the fourth notch 201d are formed in association with each other, respectively. The number of these notches is not limited to four, and is provided according to the configuration of the first elastic mechanism portion 400, which will be described later, and more specifically, the number of the first elastic mechanism portion 400.

By forming such a notch, the first notch 201a, the second notch 201b, the third notch 201c, and the fourth notch 201d accommodate the first elastic mechanism portion 400 described later. It becomes possible. As shown in FIGS. 1, 3, and 4, the flange 206 corresponds to the region I and faces the engaging portion (engaging portion on the first one end side) 208a ₁ on one end side and the other. It has an engaging portion on the end side (engaging portion on the first other end side) 208a _2, and is associated with the region II, and the engaging portion on one end side (engaging portion on the second one end side) 208b. _{It has 1} and an engaging portion on the other end side (engaging portion on the second other end side) 208b ₂ facing the same, and is associated with the region III and has an engaging portion on the one end side (third end end). It has an engaging portion on the side) 208c ₁ and an engaging portion on the other end side facing the engaging portion (engaging portion on the third other end side) 208c _2, and is associated with the region IV and engaged on one end side. It has a joint portion (engagement portion on the fourth one end side) 208d ₁ and an engagement portion on the other end side (engagement portion on the fourth other end side) 208d ₂ facing the joint portion (engagement portion on the fourth end side).

The engaging portions 208a ₁ , 208b ₁ , 208c ₁ , and 208d ₁ on each one end side can all have the same configuration, and the engaging portions 208a ₂ , 208b ₂ , 208c _2, and 208d on the other end side, respectively. ₂ can both have the same configuration. The engaging portions 208a ₁ , 208b ₁ , 208c ₁ , and 208d ₁ on each one end side may have a symmetrical configuration with _{the engaging portions 208a 2} , 208b ₂ , 208c ₂ , and 208d ₂ on the other end side. can.

Further, in the outer hub 200, as shown in FIGS. 3 and 4, the first meshing tooth 202 extending inward in the radial direction is the outer hub 200 except for the position where the second elastic mechanism portion 500, which will be described later, is arranged. It is formed in an annular shape so as to define the inner diameter. A notch 210 for accommodating the second elastic mechanism portion 500 is provided on the inner diameter side of the outer hub 200 so as to be adjacent to the first meshing tooth 202 in the circumferential direction. The number of notches 210 is provided in a number corresponding to the number of the second elastic mechanism portions 500.

The first meshing tooth 202 is mainly composed of a first tooth surface 203 and a first tooth bottom 204. The first meshing tooth 202 is configured to mesh with the second meshing tooth 302 provided on the inner hub 300, which will be described later.

The outer hub 200 can exhibit a function as a part of the damper device 1 by appropriately combining a conventionally known structure in addition to the above-described configuration. The detailed description of the conventionally known structure will be omitted.

1-3. Inner hub 300 (third rotating body 300)
The inner hub 300 is formed of, for example, a metal material and includes a substantially cylindrical cylindrical portion 301 and a substantially annular second meshing tooth 302, mainly as shown in FIGS. 3 and 4, around the rotation axis O. It is provided so as to be rotatable relative to the disc plate 100 (first disc plate 100A and second disc plate 100B) and the outer hub 200. Further, the inner hub 300 splines the input shaft (not shown) of the transmission (not shown) to the through hole 301x formed in the cylindrical portion 301 via various connecting elements (not shown). be able to.

The second meshing tooth 302 in the inner hub 300 is mainly composed of the second tooth surface 303 and the second tooth bottom 304. Further, the second meshing tooth 302 is formed on the outer peripheral surface of the inner hub 300, and is formed over the entire outer peripheral surface except for the position where the second elastic mechanism portion 500, which will be described later, is arranged. NS. As shown in FIGS. 3 and 4, at least one notch 310 for accommodating the second elastic mechanism portion 500 so as to be adjacent to the second meshing tooth 302 in the circumferential direction is provided on the outer peripheral surface of the inner hub 300. Provided. The number of notches 310 is provided in a number corresponding to the number of the second elastic mechanism portions 500.

The above-mentioned structure is merely an example. For example, the second meshing tooth 302 is arranged on the outer peripheral surface of the inner hub 300 at a position corresponding to the region II and the region IV (and the second elastic mechanism portion 500 is arranged). It may be configured so that it is partially formed only at a position different from the position). If the second meshing tooth 302 is configured to be partially formed only at the positions corresponding to the region II and the region IV, the first meshing tooth 202 also corresponds to the region II. And, only at the position corresponding to the region IV, the outer hub 200 will be formed so as to define the inner diameter.

Further, as shown in FIGS. 3 and 4, the inner hub 300 is arranged radially inward with respect to the outer hub 200, and the second meshing tooth 302 of the inner hub 300 and the first meshing tooth 202 of the outer hub 200 are arranged. Is positioned at the same axial position with respect to the rotation axis O. As a result, the second meshing tooth 302 and the first meshing tooth 202 can be meshed with each other. It should be noted that the first meshing tooth 202 (strictly speaking, the first tooth surface 203) and the second meshing tooth 302 (strictly speaking, the second tooth surface 303) are efficiently freed from defects on both tooth surfaces. Quenching treatment is performed to prevent it.

The inner hub 300 can exhibit a function as a part of the damper device 1 by appropriately combining a conventionally known structure in addition to the above-described configuration. The detailed description of the conventionally known structure will be omitted.

1-4. First elastic mechanism part 400
As shown in FIGS. 1 and 2, the first elastic mechanism portion 400 includes a first elastic body 410 in which a coil spring is mainly used, and a first seat member 420 (first seat member) that supports the first elastic body 410. It is mainly composed of 420x and the first sheet member 420y). Note that, in FIGS. 1 and 2, an example in which one first elastic body 410 is used in each first elastic mechanism portion 400 is shown, but the present invention is not limited to this, and for example, each first elastic mechanism is used. In the portion 400, two first elastic bodies 410 may be connected in series.

Then, in one embodiment shown in FIGS. 1 and 2, four accommodating portions 105 (notches 201a to 201d also in the outer hub 200) are provided corresponding to the respective regions I to IV. One first elastic body 410 is accommodated in each of the four accommodating portions 105 (notches 201a to 201d), that is, in association with each region I to IV. Further, in each region I to IV, both ends of the first elastic body 410 are supported by a pair of first sheet members 420 (first sheet member 420x and first sheet member 420y).

Here, focusing on the region I, one of the first sheet members 420 (for example, the first sheet member 420x) that supports the first elastic body 410 is a first end provided on the disc plate 100 and the outer hub 200. Each engages with the side engaging portion 208a _1. Further, the other side of the seat member 420 that supports the first elastic body 410 (for example, the first seat member 420y) is the engaging portion 208a _{2 on the other end side of the disc plate 100 and the outer hub 200.} , Each engage. Such a configuration is the same in regions II to IV.

With the above configuration, the first elastic body 410 can elastically connect the disc plate 100 and the outer hub 200 in the rotational direction via the first sheet member 420. That is, the power from the drive source such as the engine or the motor is transmitted in the order of the disc plate 100, the first seat member 420x, the first elastic body 410, the first seat member 420y, and the outer hub 200, and then the disc plate. When the 100 and the outer hub 200 rotate relative to each other, the first elastic mechanism portion 400 including the first elastic body 410 is regarded as the main damper portion that exerts the main damper function (function of absorbing torque fluctuation) in the damper device 1. be able to.

The first elastic mechanism unit 400 can exhibit the above-mentioned main damper function as a part of the damper device 1 by appropriately combining a conventionally known structure in addition to the above-mentioned configuration. The detailed description of the conventionally known structure will be omitted.

1-5. Second elastic mechanism part 500
As shown in FIGS. 1 and 2, the second elastic mechanism portion 500 is arranged at a position closer to the rotation axis O (inward in the radial direction) than the above-mentioned first elastic mechanism portion 400, and the coil spring is mainly used. It is mainly composed of a second elastic body 510 used and a second sheet member 520 (second sheet member 520x and second sheet member 520y) that supports the second elastic body 510. Note that, in FIGS. 1 and 2, an example in which one second elastic body 510 is used in each second elastic mechanism portion 500 is shown, but the present invention is not limited to this, and for example, each second elastic mechanism is used. In the portion 500, two second elastic bodies 510 may be connected in series.

The second elastic mechanism portion 500 is housed inside the notch 210 provided in the outer hub 200 and the notch 310 provided in the inner hub 300. In the second elastic mechanism portion 500 to be accommodated, both ends of the second elastic body 510 are supported by a pair of second sheet members 520 (second sheet member 520x and second sheet member 520y).

Here, focusing on FIGS. 3 and 4, one of the second seat members 520 supporting the second elastic body 510 (for example, the second seat member 520x) is the outer hub 200 (strictly speaking, the outer hub 200. The first meshing tooth 202) and the inner hub 300 (strictly speaking, the second meshing tooth 302 of the inner hub 300) are provided so as to be in contact with each other. Further, the other side of the second seat member 520 that supports the second elastic body 510 (for example, the second seat member 520y) is also the outer hub 200 (strictly speaking, the first meshing tooth 202 of the outer hub 200) and the inner hub. It is provided so as to be in contact (engagement) with 300 (strictly speaking, the second meshing tooth 302 of the inner hub 300).

With the above configuration, the second elastic body 510 can elastically connect the outer hub 200 and the inner hub 300 in the rotational direction via the second seat member 520. That is, the power transmitted to the outer hub 200 is transmitted to the outer hub 200, the second seat member 520x, the second elastic body 520, the second seat member 520y, and the inner hub 300 in this order, and then to the outer hub 200. When the inner hub 300 and the inner hub 300 rotate relative to each other, the second elastic mechanism portion 500 including the second elastic body 510 can be regarded as a pre-damper portion that exerts a pre-damper function (a function of absorbing torque fluctuation) in the damper device 1.

The second elastic mechanism portion 500 can exhibit the above-mentioned pre-damper function as a part of the damper device 1 by appropriately combining a conventionally known structure in addition to the above-mentioned configuration. The detailed description of the conventionally known structure will be omitted.

1-6. Intermediate 600
As shown in FIGS. 3 to 6, the intermediate body 600 includes a main body portion 602 having a circular outer diameter centered on the rotation axis O, and an extending portion 604 extending axially from the main body portion 602. It exhibits a predetermined angle from the extending portion 604 and extends substantially in the radial direction toward the first tooth bottom 204, and the first tooth surface 203 of the first meshing tooth 202 of the outer hub 200 and the second meshing tooth 302 of the inner hub 300. Mainly includes an elastic portion 606 that is arranged in the meshing space P formed between the second tooth surface 303 and elastically deforms in the rotational direction.

The main body 602 is formed with an insertion hole 601 through which the cylindrical portion 301 of the inner hub 300 is inserted. The inner diameter for defining the insertion hole 601 preferably has a substantially track shape. Since the inner diameter of the main body 602 exhibits a substantially track shape, when the intermediate body 600 is rotated by a certain angle (which may be an infinitely zero angle) in the forward rotation direction or the negative rotation direction, the inner diameter of the substantially track shape is inside. It is configured to be supported by the cylindrical shape of the cylindrical portion 301 of the hub 300. That is, the intermediate body 600 is provided so as to be rotatable relative to the inner hub 300 within a certain angle (infinitely, the angle may be zero) in the forward rotation direction or the negative rotation direction (intermediate body 600). The rotation of the intermediate hub 300 is not regulated by the inner hub 300), and is provided so as to be integrally rotatable with the inner hub 300 outside the range of a certain angle (the rotation of the intermediate body 600 is regulated by the inner hub 300). However, the inner diameter for defining the insertion hole 601 is not limited to a substantially track shape, and another configuration in which the intermediate body 600 is supported by the inner hub 300 can be adopted.

By adopting a configuration in which the intermediate body 600 (main body portion 602) is supported by the inner hub 300 as described above, the intermediate body 600 can adopt a configuration in which the inner hub 300 and another member are sandwiched between them. .. For example, as another member, for example, as shown in FIG. 7, a hysteresis torque generating member 700 can be adopted. If the intermediate 600 does not exist, the hysteresis torque generating member 700 generates a hysteresis torque by using the surface 320 of the inner hub 300 as a sliding surface. On the other hand, when the intermediate body 600 is present, the hysteresis generating member 700 generates hysteresis by using the main body portion 602 of the intermediate body 600 as a sliding surface. Here, by setting a large diameter of the main body portion 602, it is possible to secure a large sliding surface (in FIG. 7, the main body portion 602 is referred to as a sliding surface as compared with the case where the surface 320 is used as the sliding surface. In this case, the area of the sliding surface with respect to the hysteresis torque generating member 700 is larger). In this way, by adopting a configuration that secures a large sliding surface with respect to the hysteresis torque generating member 700, it is possible to reduce the amount of wear of the hysteresis torque generating member 700, and further, the hysteresis torque generating member. It is possible to stabilize the hysteresis torque characteristic that 700 develops.

The extending portion 604 of the intermediate body 600 is configured to extend axially from the main body portion 602. As shown in FIGS. 3 to 6, the extending portion 604 may extend in the axial direction from the outer peripheral end of the main body portion 602, or may extend in the axial direction from another place, for example. Further, the extending portion 604 is provided so as to correspond to the second tooth bottom 304 of the second meshing tooth 302, and is supported by both of them so as to be sandwiched between the second tooth bottom 304 and the first meshing tooth 202. As a result, the movement of the intermediate 600 in the radial direction is restricted. As described above, the movement of the intermediate body 600 in the radial direction is caused by the fact that the inner diameter of the main body portion 602 of the intermediate body 600 is substantially a track shape, so that the inner diameter of the substantially track shape is a cylindrical portion of the inner hub 300. It may be regulated by being provided so as to be rotatable integrally with the cylindrical shape of 301.

As described above, the elastic portion 606 of the intermediate body 600 exhibits a predetermined angle from the extending portion 604 and extends in the substantially radial direction and is arranged in the meshing space P. Here, the predetermined angle is the first angle θx (see FIGS. 4 and 6) formed by the first tooth bottom 204 and the first tooth surface 203 of the first meshing tooth 202, or the second meshing tooth 302. The angle is set to be smaller than the second angle θy (see FIGS. 4 and 6) formed by the second tooth bottom 304 and the second tooth surface 303. As a result, the elastic portion 606 is efficiently arranged in the meshing space P. The elastic portion 600 is configured to have a substantially arc shape as a whole.

2. Operation of Damper Device 1 Next, the operation of the damper device 1 having the above configuration will be described with reference to FIGS. 8A to 10. 8A shows the second rotating body 200 and the third rotating body 200 in the damper device 1 shown in FIG. 1 in a state where the second rotating body 200 and the third rotating body 300 do not rotate relative to each other and have a twist angle of 0 °. It is a schematic diagram which shows 300 and the intermediate body 600 in an enlarged manner. 8B is of the damper device 1 shown in FIG. 1, a second rotary member 200 in the third rotation body 300 and is rotated by the twist angle alpha ₁ relative state, the second rotary member 200, third rotating member It is a schematic diagram which shows 300 and the intermediate body 600 in an enlarged manner. Figure 8C, of the damper device 1 shown in FIG. 1, a second rotary member 200 in the third rotation body 300 and the relative rotation to the torsion angle alpha ₂ state, the second rotary member 200, third rotating member It is a schematic diagram which shows 300 and the intermediate body 600 in an enlarged manner. Figure 8D is, among the damper device 1 shown in FIG. 1, a second rotary member 200 in the third rotation body 300 and is rotated by the twist angle alpha ₃ relative state, the second rotary member 200, third rotating member It is a schematic diagram which shows 300 and the intermediate body 600 in an enlarged manner. Figure 8E, of the damper device 1 shown in FIG. 1, in the state of the second rotary member 200 and the third rotating member 300 and the twist angle alpha ₄ relative rotation, the second rotary member 200, third rotating member It is a schematic diagram which shows 300 and the intermediate body 600 in an enlarged manner. Figure 8F, of the damper device 1 shown in FIG. 1, in the state of the second rotary member 200 and the third rotating member 300 and the twist angle alpha ₅ relative rotation, the second rotary member 200, third rotating member It is a schematic diagram which shows 300 and the intermediate body 600 in an enlarged manner. FIG. 9 is a schematic characteristic diagram schematically showing the torsional characteristics of the damper device 1 according to the embodiment. FIG. 10 is a schematic characteristic diagram showing only a portion surrounded by a square in the schematic characteristic diagram of FIG. 9 in an enlarged manner.

First, in a state where the outer hub 200 and the inner hub 300 are not relatively rotating (in a state where the twist angle is 0 °), the elastic portion 606 of the intermediate body 600 in the damper device 1 having the above configuration is as shown in FIG. 8A. , Arranged in the meshing space P. At this time, the end portion of the elastic portion 606 is arranged so as to be separated from the first tooth surface 203 of the first meshing tooth 202 and also from the second tooth surface 303 of the second meshing tooth 302.

Next, when the outer hub 200 and the inner hub 300 start to rotate relative to each other and a twist of the twist angle α ₁ occurs between the outer hub 200 and the inner hub 300, as shown in FIG. 8B, a damper having the above configuration The elastic portion 606 (end portion) of the intermediate body 600 in the device 1 is configured to abut on the first tooth surface 203 of the first meshing tooth 202.

Next, when the relative rotation between the outer hub 200 and the inner hub 300 progresses and a twist angle α ₂ (α ₂ > α ₁ ) occurs between the outer hub 200 and the inner hub 300, FIG. 8C shows. As described above, the elastic portion 606 (near the end portion) of the intermediate body 600 in the damper device 1 having the above configuration is pressed against the first tooth surface 203 of the first meshing tooth 202 due to the relative rotation. It is elastically deformed so as to approach the second tooth surface 303 of the second meshing tooth 302.

Further, the relative rotation between the outer hub 200 and the inner hub 300 progresses, and the twist angle α ₃ (α ₃ > α ₂ ) between the outer hub 200 and the inner hub 300 is followed by α ₄ (α ₄ > α ₃ ). When the twists occur in order, as shown in FIGS. 8D and 8E, the elastic portion 606 of the intermediate body 600 is further pressed by 203 against the first tooth surface of the first meshing tooth 202 to face the second tooth surface 303. Elastically deforms to make contact.

Furthermore, when the relative rotation between the outer hub 200 and the inner hub 300 progresses and a twist angle α ₅ (α ₅ > α ₄ ) occurs between the outer hub 200 and the inner hub 300, as shown in FIG. 8F. The elastic portion 606 of the intermediate body 600 is elastically deformed so as to finally come into surface contact with the first tooth surface 203.

The damper device 1 according to the embodiment that operates as shown in FIGS. 8A to 8F has a twisting characteristic as shown in FIG. Specifically, in Until twist angle of 0 ° to alpha ₁ between the inner hub 300 and outer hub 200, the elastic portion 606 of the intermediate 600, the first engaging teeth 202 of the outer hub 200 first Since the tooth surface 203 and the second tooth surface 303 of the second meshing tooth 302 of the inner hub 300 are separated from each other, the outer hub 200 and the inner hub 300 are elastically connected only by the second elastic mechanism body 500. Will be done. That is, the twisting characteristic in the range of the twist angle 0 ° to α ₁ corresponds to the pre-damper region X depending on the elastic modulus of the second elastic body 510 in the second elastic mechanism portion 500.

_{On the other hand, between the twist angles α 1 to} α ₅ between the outer hub 200 and the inner hub 300, the elastic portion 606 of the intermediate body 600 comes into contact with the first tooth surface 203 while coming into contact with the first tooth surface 203. Since the outer hub 200 and the inner hub 300 are elastically deformed so as to approach the second tooth surface 303 when pressed, the outer hub 200 and the inner hub 300 are elastically connected by an intermediate body 600 (elastic portion 606) in addition to the second elastic mechanism body 500. The Rukoto. That is, the twisting property in the range of the twist angle α _{1 to} α ₅ depends on both the elastic modulus of the second elastic body 510 and the elastic modulus of the elastic portion 606 in the second elastic mechanism portion 500. Corresponds to region V.

When the twist angle between the outer hub 200 and the inner hub 300 _{reaches α 5} , the elastic deformation of the second elastic body 510 and the elastic portion 606 reaches the maximum. Therefore, when the twist angle between the outer hub 200 and the inner hub 300 _{becomes larger than α 5} , the outer hub 200 and the inner hub 300 rotate integrally, while the outer hub 200 (inner hub 300) and the disk The plate 100 and the plate 100 start to rotate relative to each other. In this case, the two are elastically connected by the first elastic mechanism portion 400 provided between the outer hub 200 and the disc plate 100. That is, the twisting characteristic in the range larger than the twist angle α ₅ (twist angle> α ₅ ) corresponds to the main damper region Y depending on the elastic modulus of the first elastic body 410 in the first elastic mechanism portion 400.

In the damper device 1 of one embodiment having such a twist characteristic, the twist characteristic has a substantially quadratic function due to the elastic modulus of the elastic portion 606 of the intermediate 600 in the range of the _{twist angle α 1 to} α _5. It becomes a curved curve. This is because the elastic portion 606 has a predetermined length in the substantially radial direction. Specifically, for example, at the twist angle α ₁ , as shown in FIG. 8B, the elastic portion 606 is applied to the second tooth surface 303 only in the vicinity of the base thereof (near the vicinity where it is joined to the extending portion 604). It is in contact and most of it is separated from the second tooth surface 303. Therefore, the target length of the portion that can be elastically deformed in the rotational direction in the elastic portion 606 becomes L _1. However, as the twist angle gradually increases, the target length gradually decreases to _{L 2} and L _3. That is, when the direction of the outer hub 200 from the first tooth surface 203 is used as a reference, the elastic modulus of the elastic portion 606 apparently changes as the value of the target length that can be elastically deformed gradually decreases (the elastic modulus increases). It gets bigger and bigger). With such a configuration, the twisting characteristic of the elastic portion 606 can be formed into a substantially quadratic function as shown in FIGS. 9 and 10.

As shown in FIGS. 9 and 10, the damper device 1 according to the embodiment having such a twisting characteristic is based on the inner hub 300 by minimizing the step on the characteristic diagram, which has been a problem in the past. The pre-damper region X can be smoothly transitioned to the main damper region Y based on the outer hub 200. As a result, in the damper device 1 according to the embodiment, it is possible to suppress abnormal noise that may occur when the outer hub 200 and the inner hub 300 come into contact with each other.

The above twisting characteristics have been described on the premise of the forward rotation direction (the direction in which the twist angle is positive), but the same can be set in the negative rotation direction (the direction in which the twist angle is negative). That is, in FIGS. 8A to 8F, the elastic portion 606 of the intermediate body 600 is adjacent to the first meshing space P1 (first tooth surface 203) in the forward rotation direction (clockwise direction) with respect to the second meshing tooth 302. And the second tooth surface 303 is arranged in the meshing space P that meshes in the forward rotation direction), but similarly, the second meshing space adjacent to the negative rotation direction (counterclockwise direction). It may be configured to be arranged in P2 (corresponding to the meshing space P in which the first tooth surface 203 and the second tooth surface 303 mesh in the negative rotation direction). With this configuration, the characteristic twist in the range of twist angle of 0 ° to-.alpha. ₁ corresponds to Puridanpa region X, characteristic twist in the range of twist angle-.alpha. ₁ to-.alpha. ₅ The intermediate operating region V corresponds to the characteristic twist in the range twist angle is less than-.alpha. ₅ becomes to correspond to the main damper region Y. In addition, in FIG. 9 and FIG. 10, it has been described as described above on the premise that the absolute values of the twist angle α1 and the twist angle −α1 are the same, but the absolute values of the two do not necessarily have to be the same. The absolute value of one may be set larger (or smaller) than the absolute value of the other.

As described above, the elastic portion 606 of the intermediate body 600 may be arranged in both the first meshing space P1 and the second meshing space P2, or one of the first meshing space P1 and the second meshing space P2. It may be placed only in. When the elastic portion 606 is arranged only in either the first meshing space P1 or the second meshing space P2, for example, the outer hub 200 and the inner hub only in either the forward rotation direction or the negative rotation direction. When abnormal noise occurs frequently when the 300 comes into contact with the 300, or when it is required to prevent the target twist angle of the pre-damper region X from being reduced more than necessary (maximum the target twist angle of the pre-damper region X). (When giving priority to conversion), etc. are assumed.

3. 3. Modification Example Next, the configuration of the damper device 1 according to another embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is a schematic top view schematically showing the configuration of the damper device 1 according to the second embodiment. FIG. 12 is a schematic top view schematically showing the configuration of the damper device 1 according to the third embodiment.

3-1. Damper device 1 according to the second embodiment
As the damper device 1 according to the second embodiment, the shape of the elastic portion 606 of the intermediate body 600 is not substantially arcuate, but linearly from the extending portion 604 toward the first tooth bottom 204 in the substantially radial direction. It is postponed. Even if the shape of the elastic portion 606 is linearly extended, the damper device 1 can have the same torsional characteristics as the damper device 1 according to the above-described embodiment.

3-2. Damper device 1 according to the third embodiment
As the damper device 1 according to the third embodiment, the extending portion 604 of the intermediate body 600 is provided so as to correspond to the first tooth bottom 204, and is sandwiched between the first tooth bottom 204 and the second meshing tooth 302. It is supported by both parties. As a result, the movement of the intermediate 600 in the radial direction is restricted. In the damper device 1 according to the third embodiment, the intermediate body 600 has a cylindrical shape of the cylindrical portion 301 of the inner hub 300 after the inner diameter of the main body portion 602 is substantially a track shape as in the first embodiment. It may be a configuration that is supported, a configuration that is supported by the outer hub 200, or a configuration that is not supported by either the outer hub 200 or the inner hub 300.

In the damper device 1 according to the third embodiment, the elastic portion 606 of the intermediate body 600 exhibits a predetermined angle from the extending portion 604 and extends in the substantially radial direction, similarly to the damper device 1 according to the first embodiment. It may be arranged in the meshing space P.

As described above, various embodiments have been exemplified, but the above embodiments are merely examples and are not intended to limit the scope of the invention. The above-described embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. In addition, each configuration, shape, size, length, width, thickness, height, number, etc. can be appropriately changed for implementation. In particular, the shapes of the extending portion 604 and the elastic portion 606 can be implemented by appropriately changing the size, thickness, width, shape, etc. of a part thereof and the other portion.

Further, in the above embodiment, particularly in one embodiment, in a state where the outer hub 200 and the inner hub 300 are not relatively rotated (in a state where the twist angle is 0 °), the elastic portion 606 is the first as shown in FIG. 8A. Although it has been explained that the teeth are arranged in the meshing space P so as to be separated from the first tooth surface 203 and the second tooth surface 303, this is merely an example and is not limited to this form. For example, the elastic portion 606 may come into contact with either the first tooth surface 203 or the second tooth surface 303 at a twist angle of °.

1 Damper device 100 1st rotating body (disc plate)
200 2nd rotating body (outer hub)
202 1st meshing tooth 203 1st tooth surface 204 1st tooth bottom 300 3rd rotating body (inner hub)
302 2nd meshing tooth 303 2nd tooth surface 304 2nd tooth bottom 400 1st elastic mechanism part 500 2nd elastic mechanism part 600 Intermediate body 602 Main body part 604 Extension part 606 Elastic part O Rotating shaft P Engagement space P1 1st meshing Space P2 Second meshing space θ x 1st angle θy 2nd angle

Claims (5)

First rotating body that rotates around the axis of rotation,
A second rotating body that rotates relative to the first rotating body around the rotation axis,
A third rotating body that rotates relative to the first rotating body and the second rotating body around the rotation axis.
A first elastic mechanism portion that elastically connects the first rotating body and the second rotating body in the rotational direction.
A second elastic mechanism that elastically connects the second rotating body and the third rotating body in the rotational direction, and
A main body portion having a circular outer diameter centered on the rotation axis, an extending portion extending in the axial direction from the main body portion, and extending from the extending portion at a predetermined angle, the second rotation An elastic portion arranged in a meshing space formed between the first tooth surface of the first meshing tooth of the body and the second tooth surface of the second meshing tooth of the third rotating body and elastically deforming in the rotational direction. Intermediate body,
Equipped with
The predetermined angle is a first angle formed by the first tooth base of the first occlusal tooth and the first tooth surface, or the second tooth bottom of the second occlusal tooth and the second tooth surface. A damper device set smaller than the formed second angle. The damper device according to claim 1, wherein the elastic portion has an arc shape. The elastic portion includes the first meshing space in which the first tooth surface and the second tooth surface mesh in the forward rotation direction, and the first tooth surface and the second tooth surface in the negative rotation direction. The damper device according to claim 1 or 2, which is arranged only in one of the second meshing spaces that mesh with. The damper device according to any one of claims 1 to 3, wherein the intermediate is supported by the third rotating body. The damper device according to claim 4, wherein the inner diameter of the intermediate has a substantially track shape.

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