JP2019078323A - Vehicle damper mechanism - Google Patents

Abstract

To provide a vehicle damper mechanism which can restrict displacement of coil springs in a radial direction of the coil springs and attain a desired spring constant.SOLUTION: A vehicle damper mechanism includes: a first rotary member 24; a second rotary member 27 facing the first rotary member 24 at one side of a rotation axis; multiple coil springs 28 which can be compressed by relative rotation of the first rotary member 24 and the second rotary member 27; a pair of holding parts 51, 51 which are respectively provided at end parts 28c of each coil spring 28 and restrict displacement of the end parts 28c of the coil spring 28 in a radial direction of the coil spring 28 when the coil spring 28 is compressed by the relative rotation; attachment parts 52 for attaching the holding parts 51; and pressing parts 53, each of which may press the end surface 28b of the coil spring 28 directly or through the holding part 51.SELECTED DRAWING: Figure 5

Description

  The present invention is used in a vehicle, and power transmission for transmitting power from any one of a first rotation member and a second rotation member rotatable about a rotation axis to the other of the first rotation member and the second rotation member. In the device, the deflection or vibration of the driving reaction force from the other of the first rotating member and the second rotating member is utilized using the deflection of the coil spring interposed between the first rotating member and the second rotating member. The present invention relates to a vehicle damper mechanism to be reduced.

  In Patent Document 1, an input side rotation member (corresponding to any one of a first rotation member and a second rotation member) rotatable about a rotation axis and an output side rotation member (first rotation member and a second rotation) The vehicle damper mechanism is shown having a coil spring interposed on the other of the members).

  The coil spring is inserted into a recessed portion formed in a semi-cylindrical shape and recessed in the input side rotation member on one side of the end portion so that approximately half of the projected area of one end portion of the coil spring abuts There is. In addition, the other end of the end is inserted into the recess provided on the output side rotation member so that the other half of the projected area of the other end abuts, and the coil spring is interposed so as to straddle both recesses There is.

  In Patent Document 2, as in Patent Document 1, the input side rotation member rotatable around the rotation axis and the coil spring interposed in the output side rotation member are provided in the input side rotation member, and the central angle is The power transmission is shown housed in an arc groove less than 180 °.

JP, 2016-61308, A JP, 2015-40037, A

  However, in the vehicle damper mechanism of Patent Document 1 described above, when the coil spring is compressed, forces in the reverse direction are applied to both ends of the coil spring at offset positions in the reverse direction from the input side rotation member and the output side rotation member. Therefore, the coil spring is buckled and the posture of the coil spring becomes oblique, and the coil spring contacts either surface of the input side rotating member and the output side rotating member (that is, the coil spring is displaced in the radial direction of the coil spring itself) The desired spring constant was not obtained.

  Moreover, in the power transmission device of Patent Document 2 described above, the coil spring is only stored in the arc groove. Therefore, when the coil spring is compressed due to relative rotation between the input side rotation member and the output side rotation member, the coil spring meanders in the arc groove, that is, the coil spring buckles. Therefore, since the coiled spring is pressed into the arc groove (i.e., the coiled spring is displaced in the radial direction of the coiled spring itself), a desired spring constant can not be obtained.

  An object of the present invention is to provide a damper mechanism for a vehicle which can restrict displacement of a coil spring in the radial direction of the coil spring and can obtain a desired spring constant.

  A damper mechanism for a vehicle according to the present invention comprises: a first rotating member rotatable about a rotational axis; and a second rotatable member rotatable about the rotational axis and facing the first rotational member on one side of the rotational axis A rotating member, a plurality of coil springs compressible by relative rotation between the first rotating member and the second rotating member, and an end portion of the coil spring are provided, respectively, when the coil spring is compressed by the relative rotation A pair of holding portions for restricting displacement of an end portion of the coil spring in a radial direction of the coil spring, and one of the first rotating member and the second rotating member A mounting portion for mounting a portion, and any one of the first rotating member and the second rotating member, and one side of the radial direction of the coil spring of the end face of the coil spring and the coil spring Radial And a pressing portion which is capable of pressing the side directly or via the holding portion.

  According to this, in the vehicle damper mechanism, the end of the coil spring restricts the displacement of the coil spring in the radial direction, the mounting portion for mounting the holding portion, and the coil spring of the end surface of the coil spring. The end face of the coil spring can be uniformly pressed without being biased by the pressing portion which can press one side in the radial direction and the other side in the radial direction of the coil spring directly or through the holding portion. Therefore, when the coil spring is compressed, displacement of the coil spring in the radial direction of the coil spring can be restricted. Thereby, the coiled spring can obtain a desired spring constant.

BRIEF DESCRIPTION OF THE DRAWINGS It is the skeleton figure which showed notionally an example of the power transmission device for vehicles to which the damper mechanism for vehicles of this invention is applied. It is sectional drawing of the power transmission device for vehicles shown in FIG. It is an external view which partially opens and shows the power transmission device for vehicles shown in FIG. It is the external view which looked at the power transmission device for vehicles shown in FIG. 3 from the reverse direction to FIG. It is a perspective view which shows the state before the assembly in 1st embodiment of the damper mechanism for vehicles of this invention. It is explanatory drawing which shows the state which hold | maintains the coiled spring of the damper mechanism for vehicles of 1st embodiment to a holding | maintenance part. It is a perspective view which shows the state which attached the coiled spring of the damper mechanism for vehicles of 1st embodiment to a counter driven gear. It is sectional drawing which shows the attachment state of the damper mechanism for vehicles of 1st embodiment. It is explanatory drawing explaining the relationship of arrangement | positioning of a coiled spring, a press part, and an attaching part. It is a perspective view which shows the state before the assembly in 2nd embodiment of the damper mechanism for vehicles of this invention. It is a perspective view which shows the state which attached the coiled spring of the damper mechanism for vehicles of 2nd embodiment to the counter driven gear. It is explanatory drawing which shows the state which the coil spring in the damper mechanism for vehicles of 2nd embodiment attached to the counter driven gear. It is explanatory drawing which shows the other example of the rotation member of the damper mechanism for vehicles. It is the skeleton figure which showed notionally the other example of the power transmission device for vehicles to which the damper mechanism for vehicles of this invention is applied.

(An example of a power transmission device for a vehicle)
Hereinafter, an example of a power transmission apparatus for a vehicle to which the damper mechanism for a vehicle according to the present invention is applied will be described with reference to the drawings.

  The power transmission system 10 for a vehicle shown in FIG. 1 includes a power source output shaft 12 for outputting the driving force of the power source 11, an intermediate shaft 13 disposed parallel to the power source output shaft 12, and a parallel shaft. And wheel drive shafts 16a, 16b arranged to drive the left and right drive wheels 14a, 14b.

  The vehicular power transmission device 10 is provided on the intermediate shaft 13 with a first reduction gear pair 17 constituted by a counter drive gear 23 provided on the power source output shaft and a counter driven gear 24 provided on the intermediate shaft 13. And a reduction gear mechanism 19 having a second reduction gear pair 18 composed of the final drive gear 25 and the final driven gear 26 provided on the wheel drive shafts 16a and 16b.

  The vehicle power transmission device 10 is provided with a vehicle damper mechanism 20 provided on the intermediate shaft 13 and reducing fluctuation or vibration of a drive reaction force applied from the drive wheels 14 a and 14 b to the power source 11.

  A commonly known differential mechanism 15 including a final driven gear 26 and provided between the left and right drive wheels 14a and 14b is connected to the wheel drive shafts 16a and 16b to provide a rotational speed difference to the left and right drive wheels 14a and 14b. It can be provided.

  As shown in FIG. 1, the aforementioned power source 11, power source output shaft 12, intermediate shaft 13, wheel drive shafts 16a, 16b, reduction gear mechanism 19, differential mechanism 15, and vehicle damper mechanism 20 It is provided inside the casing 22 of the vehicle power transmission device 10. In addition. The wheel drive shafts 16a and 16b extend outward from the inner side of the casing 22, and drive wheels 14a and 14b are mounted at the extended ends thereof. The power source output shaft 12, the intermediate shaft 13, and the wheel drive shafts 16 a and 16 b are rotatably supported by the bearings 31, 32, 33 a and 33 b with respect to the casing 22.

(Power source)
The power source 11 is, for example, an electric motor, and the electric motor 11 includes a rotor 11 b that rotates with a stator 11 a as shown in FIG. 1, and the rotor 11 b is connected to the power source output shaft 12. Thus, the driving force of the electric motor 11 which is a power source is outputted from the power source output shaft 12, and the power source output shaft 12 rotates around the rotation axis r1.

  The power source output shaft 12 is hollow, and the wheel drive shaft 16a is inserted therein, and the power source output shaft 12 and the wheel drive shaft 16a are coaxially disposed. The power source is not limited to the electric motor, and may be an internal combustion engine.

(First reduction gear pair)
The first reduction gear pair 17 meshes with the counter drive gear 23 connected to the power source output shaft 12 so as to rotate integrally with the power source output shaft 12 as shown in FIG. And a counter driven gear 24 rotatably connected to the gear. The counter drive gear 23 rotates around the power source output shaft 12 (rotation axis r1), and the counter driven gear 24 rotates around the intermediate shaft 13 (rotation axis r2).

  Thus, the driving force from the power source output shaft 12 is transmitted to the intermediate shaft 13 via the counter drive gear 23 and the counter driven gear 24. The counter driven gear 24 is configured by a gear having a diameter larger than that of the counter drive gear 23.

(Second reduction gear pair)
As shown in FIG. 1, the second reduction gear pair 18 is disposed on one side (right side in FIG. 1) of the intermediate shaft 13 with respect to the first reduction gear pair 17. The second reduction gear pair 18 includes a final drive gear 25 connected to the intermediate shaft 13 so as to rotate integrally with the intermediate shaft 13, and a final driven gear 26 provided on the wheel drive shafts 16a and 16b and engaged with the final drive gear 25. , Is composed.

  The final driven gear 26 is connected to a generally known differential mechanism 15 and rotatably provided relative to the wheel drive shafts 16a and 16b. The final drive gear 25 rotates around the intermediate shaft 13 (that is, around the rotation axis r2), and the final driven gear 26 rotates around the rotation axis r1.

  In this manner, the driving force transmitted from the final drive gear 25 connected to the intermediate shaft 13 to the final driven gear 26 is transmitted to the wheel drive shafts 16 a and 16 b via the differential mechanism 15. The final driven gear 26 is configured by a gear larger in diameter than the final drive gear 25.

(Damper mechanism for vehicles)
As shown in FIG. 1, the vehicle damper mechanism 20 is disposed on one side (right side in FIG. 1, right side of the rotation axis r2) of the intermediate shaft 13 with respect to the counter driven gear 24 and the counter driven gear 24. The counter driven gear 24 and the rotating plate 27 are interposed between the counter driven gear 24 and the rotating plate 27. The rotating plate 27 is provided so as to be rotatable around the intermediate shaft 13 (that is, around the rotation axis r2) facing the driven gear 24. And a coil spring 28 that can be compressed by relative rotation with the above.

  As shown in FIG. 1, the counter driven gear 24 is rotatably coupled to the intermediate shaft 13, and the rotating plate 27 is coupled to the intermediate shaft 13 so as to rotate integrally with the intermediate shaft 13.

  The vehicle damper mechanism 20 bends or compresses the coil spring 28 by the relative rotation of the counter driven gear 24 and the rotating plate 27 with the driving force of the power source output shaft 12 to counter the driving force of the power source output shaft 12 It is transmitted from the driven gear 24 to the rotating plate 27.

  Further, the vehicle damper mechanism 20 is configured such that the impact torque applied to the electric motor 11 from the side of the drive wheels 14 a and 14 b caused by the unevenness of the road surface, that is, the fluctuation or The relative rotation allows the coil spring 28 to be flexed or compressed and reduced.

  Thus, as shown in FIG. 1, the counter driven gear 24, the rotating plate 27 and the coil spring 28 constituting the vehicle damper mechanism 20 form the conventional dead space of the counter driven gear 24, that is, the conventional intermediate shaft 13. It is provided in the dead space. As a result, since the vehicle damper mechanism 20 is provided on the intermediate shaft 13 which is conventionally a dead space, the vehicle power transmission device 10 does not increase the axial length of the intermediate shaft 13 or the intermediate shaft 13 and the wheel drive shaft 16a, The vehicle damper mechanisms 20 and 20A can be provided without increasing the inter-axial distance 16b, that is, without increasing the size of the entire vehicle power transmission device 10.

  An example of implementation of this power transmission device 10 for vehicles is shown in FIG.2, FIG.3, FIG.4. The illustration of the drive wheels 14a and 14b is omitted in FIGS. 3 and 4.

  The vehicle damper mechanism 20 is provided on the counter driven gear 24 which is a gear on the large diameter side of the first reduction gear pair 17 provided on the intermediate shaft 13 in this manner. Thereby, since the counter driven gear 24 is a gear pair most accelerated from the wheel drive shafts 16a and 16b, the small size of the vehicle damper mechanism 20 can be utilized because the torque is small. It is advantageous and can suppress the weight increase.

<First Embodiment of Damper Mechanism for Vehicle>
Next, a first embodiment of the vehicle damper mechanism 20 in the present invention will be described based on FIGS. 5 to 9.
As described above, the vehicle damper mechanism 20 includes the counter driven gear 24, the rotating plate 27, and the coil spring 28. As shown in FIG. 8, the ring portion 13a extends in the radial direction of the intermediate shaft 13 from the intermediate shaft 13. The intermediate shaft 13 is provided with a bearing 32 mounted on the intermediate shaft 13.

  As shown in FIG. 8, the counter driven gear 24 is provided rotatably on the intermediate shaft 13 via a needle bearing (not shown), and the counter driven gear 24 rotates around the intermediate shaft 13 (rotation axis r2). .

  The rotating plate 27 is disposed on one side (the right side of FIG. 8 and the right side of the rotation axis r2) of the intermediate shaft 13 with respect to the counter driven gear 24 as shown in FIG. The rotary plate 27 is rotatably provided about the 13 rotations (rotation axis r2), and is connected to the intermediate shaft 13 so as to rotate integrally with the intermediate shaft 13 by press-fitting spline fitting or the like.

  The coil spring 28 is interposed between the counter driven gear 24 and the rotating plate 27, as shown in FIG. 8, and can be compressed by relative rotation between the counter driven gear 24 and the rotating plate 27. The counter driven gear 24 corresponds to any one of the first rotating member and the second rotating member in the present invention. The rotating plate 27 corresponds to either the first rotating member or the second rotating member in the present invention.

<Holding part>
As shown in FIG. 5 to FIG. 8, a pair of holding portions 51, 51 is provided in the plurality of (the four examples are shown in FIG. 5) coil springs 28. The holding portion 51 is provided at each end 28 c of the coil spring 28, and the end 28 c of the coil spring 28 extends in the radial direction of the coil spring 28 when the coil spring 28 is compressed by relative rotation between the counter driven gear 24 and the rotating plate 27. Regulate displacement. As shown in FIGS. 6 and 8, the holding portion 51 can be inserted and disposed in the end 28 c of the coil spring 28 and can be in contact with the in-contact portion 28 a (contacted portion) in the end 28 c. 51a and an abutting surface 51b that can abut on the end surface 28b of the coil spring 28. Therefore, the holding portion 51 can restrict displacement of the end 28 c of the coil spring 28 in the radial direction of the coil spring 28.

<Mounting part>
The attachment portion 52 extends in the circumferential direction of the counter driven gear 24 or the rotary plate 27 as shown in FIG. 5 and one side of the counter driven gear 24 to the middle shaft 13 (a lower right side in FIG. 5 and a right side in FIG. 8) The counter driven gear 24 is erected so as to extend toward it.

  The holding portion 51 has a bottomed groove 51 c on the radial center of the coil spring 28. On the other side of the holding portion 51 (the back side of the convex portion 51a or the contact surface 51b), there is a bottomed groove 51c in which the holding portion 51 is fitted in the mounting portion 52 slidably in the circumferential direction of the counter driven gear 24 or the rotary plate 27 It is provided. As shown in FIG. 7, the bottomed groove 51 c of the holding portion 51 is fitted to the mounting portion 52, and the holding portion 51 is mounted to the mounting portion 52.

  The pair of holding portions 51 is provided at each end of one coil spring 28. Therefore, the vehicle damper mechanism 20 has four coil springs 28, and the pair of holding portions 51 is provided four. The holding unit 51 alone has a total of eight. As shown in FIGS. 5 and 7, four mounting portions 52 are provided in the vehicle damper mechanism 20. On one mounting portion 52, as shown in FIG. 7, the holding portions 51 of the coil springs 28 adjacent to each other, that is, two pairs of holding portions 51 are mounted.

<Pressing part>
A pressing portion 53 capable of pressing the end face 28 b of the coil spring 28 by relative rotation between the counter driven gear 24 and the rotation plate 27 is provided on the rotation plate 27. Four pressing portions 53 are provided in the vehicle damper mechanism 20 corresponding to the four coil springs 28 of the vehicle damper mechanism 20. As shown in FIG. 9, the pressing portion 53 has one end in the radial direction of the coil spring 28 of the end face 28 b of the end 28 c of the coil spring 28 and the other end in the radial direction of the coil spring 28 directly or through the holding portion 51. Can be pressed.

  Thus, the end portion of the coil spring 28 can be uniformly pressed by the pressing portion 53 without being biased. Specifically, as shown in FIG. 9, the pressing portion 53 is the inside in the radial direction of the counter driven gear 24 of the end face 28 b of the coil spring 28 and the outside in the radial direction of the counter driven gear 24 of the end face 28 b of the coil spring 28. The leg 54 is capable of pressing the That is, the leg portion 54 is disposed on one side of the mounting portion 52 (inward in the radial direction of the counter driven gear 24) and the other side of the mounting portion 52 (inward of the radial direction of the counter driven gear 24) in the radial direction of the counter driven gear 24. Having a leg 54 formed.

  Specifically, as shown in FIG. 9, the leg portion 54 is provided on the first leg portion 54 a provided on one side of the mounting portion 52 and on the other side of the mounting portion 52 in the radial direction of the counter driven gear 24. And a second leg 54b. The mounting portion 52 can be positioned between the first leg 54a and the second leg 54b.

  The first leg 54a and the second leg 54b of the leg 54 are erected on the rotary plate 27 so as to extend toward the other of the intermediate shaft 13 (upper left in FIG. 5, left in FIG. 8). It is done. The first leg 54 a and the second leg 54 b have a bifurcated shape as shown in FIGS. 5 and 8. The attachment portion 52 can be positioned between the first leg 54a and the second leg 54b of the pressing portion 53, as shown in FIG.

  As a result, relative rotation between the rotary plate 27 and the counter driven gear 24 can be secured. The pressing portion 53 is provided such that the first leg portion 54a and the second leg portion 54b sandwich the mounting portion 52 in the radial direction of the counter driven gear 24 between the holding portions 51 and 51 of the coil springs 28 adjacent to each other. Be

  The pressing portion 53 is not limited to a bifurcated shape like the above-described leg portion 54, and it is apparent that another shape, for example, a single shape may be used.

<Operation of vehicle damper mechanism>
The operation of the vehicle damper mechanism 20 will be described below. When the driving force of the power source 11 is transmitted to the drive wheels 14a and 14b, that is, the driving force of the electric motor 11 is transmitted to the counter driven gear 24. The end face 28b of the end 28c on one side of the coil spring 28 is rotated by the mounting portion 52 through the holding portion 51, ie, the contact surface 51b, by the action of the mounting portion 52 accompanying the rotation of the counter driven gear 24 It is pressed by.

  On the other hand, the other end surface 28 b of the end portion 28 c of the coil spring 28 is pressed by receiving by the pressing portion 53 via the holding portion 51, and the coil spring 28 is compressed. Thus, the vehicle damper mechanism 20 transmits the driving force from the counter driven gear 24 to the rotating plate 27 by the compression of the coil spring 28 accompanying the rotation of the counter driven gear 24.

  Further, in the vehicle, for example, when the driving reaction force generated by the unevenness of the road surface is applied to the electric motor 11 from the driving wheels 14a and 14b side, the driving reaction force is applied to the counter driven gear 24 from the rotating plate 27. In this case, the pressing portion 53 directly presses the other end surface 28 b of the end portion 28 c of the coil spring 28 in the rotation direction of the rotation plate 27 by the action of the pressing portion 53 accompanying the rotation of the rotation plate 27.

  On the other hand, the end face 28 b of the end 28 c of the coil spring 28 is pressed by the attachment portion 52 via the holding portion 51, and the coil spring 28 is compressed. As described above, the vehicle damper mechanism 20 reduces the fluctuation or vibration of the driving reaction force from the rotating plate 27 to the counter driven gear 24 by the compression of the coil spring 28 accompanying the rotation of the rotating plate 27.

  In the case where the driving force of the power source output shaft 12 is transmitted toward the wheel drive shafts 16a and 16b via the intermediate shaft 13, the rotational direction of the counter driven gear 24 in the example shown in FIG. It is counterclockwise when viewed from the side.

  The counter driven gear 24 is configured by a helical gear. Specifically, as shown in FIG. 5, in the counter driven gear 24, the tooth 24 a is on one side of the intermediate shaft 13 (slant right lower side in FIG. 5) from the other side (diagonal left upper side in FIG. 5) of the intermediate shaft 13. It is a helical gear twisted on the rear side in the rotational direction.

  Sliding members abutting the counter driven gear 24 and the rotating plate 27 radially inward of the coil spring 28 between the counter driven gear 24 and the rotating plate 27 which are helical gears, for example, as shown in FIGS. 2 and 8 , Thrust bearings 41 or thrust washers. Thus, the vehicular power transmission device 10 prevents the occurrence of wear due to the contact between the counter driven gear 24 which is a helical gear and the rotary plate 27 by the thrust force of the helical gear acting on the rotary plate 27. be able to. The final drive gear 25 connected to the intermediate shaft 13 is also a helical gear, and the direction of the teeth 25a is the same as that of the counter driven gear 24.

  The distance between the holding portion 51 and the holding portion 51 constituting the pair of holding portions 51, that is, specifically, the contact surface 51b of the holding portion 51 and the holding portion 51 as shown in FIG. Based on the distance L between the surfaces 51b, it is possible to set the preload torque of the vehicle damper mechanism 20, that is, the torque which does not operate when the drive torque of the electric motor 11 is less than the predetermined torque. Thereby, the damper mechanism 20 for vehicles can be set to a desired characteristic.

Second Embodiment of Vehicle Damper Mechanism
Next, a second embodiment of the vehicle damper mechanism will be described with reference to FIGS. The vehicle damper mechanism 20A of the second embodiment shown in FIGS. 10 to 12 has the same members as the members shown by the vehicle damper mechanism 20 of the first embodiment described above in the reference numerals shown in the vehicle damper mechanism 20. It is shown with the same reference number as.

  In the vehicle damper mechanism 20A of the second embodiment, as shown in FIGS. 10 and 12, the vehicle damper mechanism 20 of the first embodiment is only that the holding portion 51 is integrally fixed to the mounting portion 52. And is different. The remaining configuration of the vehicle damper mechanism 20A is the same as that of the above-described vehicle damper mechanism 20.

  In the vehicle damper mechanism 20A, as shown in FIGS. 10 and 12, the holding portion 51 is integrally fixed to the mounting portion 52. Specifically, the holding portions 51 of the coil springs 28 adjacent to each other, that is, two pairs of holding portions 51 are integrally fixed to one mounting portion 52.

  The end 28c of the coil spring 28 of the vehicle damper mechanism 20A and the contact portion 28a in the end 28c are all provided in the same manner as the vehicle damper mechanism 20. However, in the vehicle damper mechanism 20A, only one coil spring 28 among the four coil springs 28 is shown in FIG. 12, and the numbering of the other three coil springs 28 is omitted.

  The convex portion 51a of the holding portion 51 in the vehicle damper mechanism 20A of the second embodiment is formed in a tapered shape in which the outer diameter decreases toward the tip. Thereby, when the coiled spring 28 is compressed, the coiled spring can be compressed smoothly without being interfered by the convex portion 51a.

  The operation of the vehicle damper mechanism 20A will be described below. When the driving force of the power source 11 is transmitted to the drive wheels 14a and 14b, that is, the driving force of the electric motor 11 is transmitted to the counter driven gear 24. The end face 28b of the end 28c on one side of the coil spring 28 is rotated by the mounting portion 52 through the holding portion 51, ie, the contact surface 51b, by the action of the mounting portion 52 accompanying the rotation of the counter driven gear 24 It is pressed by.

  On the other hand, the other end surface 28b of the end portion 28c of the coil spring 28 is directly pressed by receiving by the pressing portion 53, and the coil spring 28 is compressed. Thus, the vehicle damper mechanism 20 transmits the driving force from the counter driven gear 24 to the rotating plate 27 by the compression of the coil spring 28 accompanying the rotation of the counter driven gear 24.

  Further, when a driving reaction force generated by the vehicle, for example, due to the unevenness of the road surface is applied to the electric motor 11 from the driving wheels 14a and 14b side, the driving reaction force is applied to the counter driven gear 24 from the rotating plate 27. In this case, the pressing portion 53 directly presses the other end surface 28 b of the end portion 28 c of the coil spring 28 in the rotation direction of the rotation plate 27 by the action of the pressing portion 53 accompanying the rotation of the rotation plate 27.

  On the other hand, the end face 28 b of the end 28 c of the coil spring 28 is pressed by the attachment portion 52 via the holding portion 51, and the coil spring 28 is compressed. As described above, the vehicle damper mechanism 20 reduces the fluctuation or vibration of the driving reaction force from the rotating plate 27 to the counter driven gear 24 by the compression of the coil spring 28 accompanying the rotation of the rotating plate 27.

  Another example of the rotating plate 27 used for the vehicle damper mechanism 20, 20A will be described with reference to FIG. In the rotation plate 27 shown in FIG. 13, a peripheral wall portion 55 extending along the circumferential direction from the outermost portion 53 a of the pressing portion 53 is provided. The peripheral wall 55 extends circumferentially outward in the radial direction from the outermost portion 53a and extends along the rotation axis r2 (shown in FIGS. 1 and 2) of the rotary plate 27, ie, upward in the drawing of FIG. Extend.

  Thus, when the vehicle damper mechanism 20, 20A removes the coil spring 28 from the mounting portion 52 for inspection or the like, the coil spring 28 in the circumferential wall 55 passes the rotation plate 27 in the radial direction of the rotation plate 27. Of the coil spring 28 can be prevented.

  In the examples of the vehicle damper mechanism 20 and the vehicle damper mechanism 20A described above, the attachment portion 52 is provided on the counter driven gear 24, and the pressing portion 53 is provided on the rotating plate 27. However, without being limited to this example, it is apparent that the mounting portion 52 can be provided on the rotating plate 27 and the pressing portion 53 can be provided on the counter driven gear 24.

(Other Examples of Power Transmission Device for Vehicle)
Next, another example of a vehicle power transmission to which the vehicle damper mechanism of the present invention is applied will be described with reference to FIG. In the power transmission system 10A for a vehicle shown in FIG. 14, the same members as the members shown in FIG. 1 are shown with the same reference numerals as the reference numerals shown in FIG.

  In the vehicle power transmission device 10A, as shown in FIG. 14, the power source output shaft 12 and the wheel drive shafts 16a and 16b are not coaxially arranged, and the wheel drive shafts 16a and 16b are power source output shafts. It differs from the power transmission system 10 for vehicles only in that it is provided apart from 12 and in parallel. The remaining configuration of the vehicle power transmission device 10A is the same as that of the vehicle power transmission device 10 shown in FIG.

  Therefore, the vehicle power transmission device 10A is also provided with the vehicle damper mechanisms 20 and 20A on the intermediate shaft 13 in the same manner as the vehicle power transmission device 10. In the vehicle power transmission device 10A, it is apparent that the power source output shaft 12 may be solid or not hollow.

(Effect of the embodiment)
As described above, according to the vehicle damper mechanisms 20 and 20A according to the first embodiment and the second embodiment of the present invention, the first rotating member 24 rotatable around the rotation axis r2, and around the rotation axis r2 A plurality of coil springs which are rotatable and can be compressed by relative rotation between the second rotary member 27 facing the first rotary member 24 on one side of the rotary axis r2, and the first rotary member 24 and the second rotary member 27 28 and a pair of holding portions provided respectively at the end 28c of the coil spring 28 and restricting displacement of the end 28c of the coil spring 28 in the radial direction of the coil spring 28 when the coil spring 28 is compressed by relative rotation 51, 51, an attachment portion 52 provided on any one of the first rotating member 24 and the second rotating member 27 for attaching the holding portion 51, and of the first rotating member 24 and the second rotating member 27 either A pressing portion 53 provided on one side and capable of pressing one side of the end face 28b of the coil spring 28 in the radial direction of the coil spring 28 and the other side in the radial direction of the coil spring 28 directly or through the holding portion 51; Equipped with Thus, in the vehicle damper mechanism 20, 20A, the end portion 28c of the coil spring 28 regulates the displacement of the coil spring 28 in the radial direction, and the mounting portion 52 for mounting the holding portion 51 The coil spring 28 can be pressed by one side of the end face 28 b of the coil spring 28 in the radial direction of the coil spring 28 and the other side in the radial direction of the coil spring 28 directly or through the holding portion 51. The end face 28b of the second can be uniformly pressed without deviation. Accordingly, when the coil spring 28 is compressed, displacement of the coil spring 28 in the radial direction of the coil spring 28 can be restricted. Thereby, the coiled spring 28 can obtain a desired spring constant.

  As described above, according to the vehicle damper mechanisms 20 and 20A according to the first and second embodiments of the present invention, the holding portion 51 can be inserted and arranged in the end portion 28c of the coil spring 28, and the end It has convex part 51a which can be contacted to contact part 28a in part 28c, and contact surface 51b which can be contacted to end face 28b of coiled spring 28. Accordingly, it is possible to restrict displacement of the coil spring 28 in the radial direction of the coil spring 28 when the coil spring 28 is compressed.

  As described above, according to the vehicle damper mechanism 20, 20A according to the first embodiment of the present invention, the holding portion 51 has the bottomed groove 51c on the radial center of the coil spring 28, and the bottomed end The groove 51 c is slidably fitted in the mounting portion 52 in the circumferential direction of the first rotating member 24 or the second rotating member 27. Thereby, the slide of the holding portion 51 in the circumferential direction of the first rotating member 24 or the second rotating member 27 is guided by the bottomed groove 51 c.

  As described above, according to the vehicle damper mechanism 20A according to the second embodiment of the present invention, the holding portion 51 is integrally fixed to the mounting portion 52. As a result, the number of parts of the vehicle damper mechanism 20A can be reduced, and the work of attaching the holding portion 51 to the mounting portion 52 can be eliminated.

  As described above, according to the vehicle damper mechanisms 20 and 20A according to the first embodiment and the second embodiment of the present invention, the pressing portion 53 is one of the attachment portions 52 in the radial direction of the first rotating member 24. It has a leg 54 arranged on the side and on the other side of the attachment 52. As a result, the end surface 28 b of the coil spring 28 can be uniformly pressed by the leg portions 54 of the pressing portion 53 separated inward and outward in the radial direction of the first rotating member 24 without being biased.

  As described above, according to the vehicle damper mechanisms 20 and 20A according to the first embodiment and the second embodiment of the present invention, the leg portion 54 is one of the attachment portions 52 in the radial direction of the first rotation member 24. A first leg 54a provided on the side and a second leg 54b provided on the other side of the mounting portion 52, and the mounting portion 52 is provided between the first leg 54a and the second leg 54b It is positionable. Thus, in the vehicle damper mechanisms 20 and 20A, relative rotation between the first rotating member 24 and the second rotating member 27 can be secured.

  As described above, according to the vehicle damper mechanisms 20 and 20A according to the first embodiment and the second embodiment of the present invention, either one of the first rotating member 24 and the second rotating member 27 A peripheral wall portion 55 extending along the circumferential direction from the outermost portion 53a of the pressing portion 53 is provided. Thus, when the vehicle damper mechanism 20, 20A removes the coil spring 28 from the mounting portion 52 for inspection or the like, the coil spring 28 is the other of the first rotating member 24 and the second rotating member 27. The peripheral wall 55 can prevent the coil spring 28 from coming off in the radial direction beyond the outermost portion 53a.

  As described above, according to the vehicle damper mechanism relating to the first embodiment and the second embodiment of the present invention, in any one of the first rotating member 24 and the second rotating member 27, the tooth line rotates. It is a helical gear that is twisted on the rear side in the rotational direction from the other side of the rotation axis, and one side of the axis is a first rotation member 24 and a second rotation between the first rotation member 24 and the second rotation member 27 A sliding member 41 is provided in contact with the member 27. Thereby, the thrust force by the helical gear acts on any one of the first rotating member 24 and the second rotating member 27 to abut on the other of the first rotating member 24 and the second rotating member 27. It is possible to prevent wear due to

  It should be noted that, when there are a plurality of embodiments, it is obvious that the characteristic parts of the respective embodiments can be combined as appropriate, unless otherwise specified.

20, 20A: vehicle damper mechanism 24: counter driven gear (one of the first rotating member and the second rotating member)
27: Rotating plate (either the first rotating member or the second rotating member, or the other)
28: coil spring 28a: in-end contact portion 28b: end surface 28c of coil spring: end 41 of coil spring: thrust bearing 51: holding portion 51a: convex portion 51b: contact surface 52; mounting portion 53: pressing portion 53a : Outermost portion 54: Leg portion 54a: First leg portion 54b: Second leg portion 55: Peripheral wall portion

Claims (8)

A first rotating member rotatable about an axis of rotation;
A second rotating member rotatable about the rotation axis and facing the first rotation member on one side of the rotation axis;
A plurality of coil springs compressible by relative rotation between the first rotating member and the second rotating member;
A pair of holding parts respectively provided at the end of the coiled spring, and restricting displacement of the end of the coiled spring in the radial direction of the coiled spring when the coiled spring is compressed by the relative rotation;
An attaching portion provided on any one of the first rotating member and the second rotating member for attaching the holding portion;
Provided on any one of the first rotating member and the second rotating member, and one side of the radial direction of the coil spring of the end surface of the coil spring and the other side of the radial direction of the coil spring And a pressing portion that can be pressed directly or through the holding portion.   The holding portion has a convex portion which can be inserted and arranged in an end portion of the coil spring and can be in contact with the in-end contact portion, and a contact surface which can be in contact with an end surface of the coil spring. The damper mechanism for vehicles of claim 1.   The holding portion has a bottomed groove on the radial center of the coil spring, and the bottomed groove is slidably provided in a circumferential direction of the first rotating member or the second rotating member. The damper mechanism for a vehicle according to claim 1 or 2, which fits into the above.   The vehicle damper mechanism according to claim 1, wherein the holding portion is integrally fixed to the mounting portion.   The vehicle according to any one of claims 1 to 4, wherein the pressing portion has a leg portion disposed on one side of the mounting portion and the other side of the mounting portion in the radial direction of the first rotating member. Damper mechanism.   The leg portion includes a first leg portion provided on one side of the mounting portion in the radial direction of the first rotating member, and a second leg portion provided on the other side of the mounting portion. The vehicle damper mechanism according to claim 5, wherein the mounting portion is provided between the first leg and the second leg.   The peripheral wall part extended along the circumferential direction from the outermost part of the said press part was provided in any one of the said 1st rotation member and the said 2nd rotation member. The vehicle damper mechanism according to claim 1.   One of the first rotating member and the second rotating member is a helical gear in which a tooth line is twisted rearward of the one side of the rotational axis from the other side of the rotational axis in the rotational direction. The sliding member which abuts on the said 1st rotation member and the said 2nd rotation member between the said 1st rotation member and the said 2nd rotation member is provided, It is described in any one of Claims 1-7. Vehicle damper mechanism.

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