JP2018071728A - Continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuously variable transmission which can reduce agitation resistance of a continuously variable transmission mechanism.SOLUTION: A continuously variable transmission 1 includes: a transmission case 3 in which an oil storage part 4 for storing an oil O is provided at a bottom part; a continuously variable transmission mechanism 2 housed in the transmission case 3; and attachment plates 7, 8 which are attached to a fixing carrier 13 of the continuously variable transmission mechanism 2 and fix the continuously variable transmission mechanism 2 to the transmission case 3 with multiple bolts 20. Partition plates 21A, 21B partitioning the continuously variable transmission mechanism 2 from the oil storage part 4 are provided at lower parts of the attachment plates 7, 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a continuously variable transmission mounted on a vehicle.

  Conventionally, as a continuously variable transmission that changes the gear ratio steplessly, a first rotating member to which power is input is connected to the first rotating member via a plurality of planetary balls. A device including a second rotating member to which power is transmitted via a plurality of planetary balls, and a housing that houses the first rotating member and the second rotating member is known (for example, Patent Documents). 1).

  In this continuously variable transmission, the planetary ball is tilted and rolled to switch the gear ratio between the first rotating member and the second rotating member in a stepless manner.

  The continuously variable transmission has a shaft in which a lubricating oil supply hole for supplying lubricating oil into the housing is formed from the radially inner side toward the radially outer side. The casing is formed with a discharge hole for discharging the lubricating oil inside the casing to the outside of the casing on one side wall in the axial direction of the shaft and radially outside the lubricating oil supply hole.

JP 2014-92175 A

  In such a conventional continuously variable transmission, oil discharged from the continuously variable transmission is temporarily stored at the bottom of the housing. As a result, the lower portions of the first rotating member and the second rotating member are immersed in oil, and the stirring resistance of the continuously variable transmission may increase.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a continuously variable transmission that can reduce the stirring resistance of the continuously variable transmission mechanism.

  The present invention includes a transmission case in which an oil storage portion in which oil is stored is provided at the bottom, a continuously variable transmission mechanism housed in the transmission case, and a continuously variable transmission mechanism provided integrally with the plurality of continuously variable transmission mechanisms. And a mounting member for fixing the continuously variable transmission mechanism to the transmission case by being fastened to the transmission case by a fastening member, the continuously variable transmission mechanism having a circular outer peripheral portion, An input member that is input; an output member that has a circular outer periphery and outputs power; and a plurality of rolling members that can roll by connecting the input member and the output member, A continuously variable transmission configured to change a transmission ratio steplessly by rolling a rolling member to change a position of a contact portion between the rolling member, the input member, and the output member. The continuously variable transmission mechanism and the front Wherein the partition member partitions the oil reservoir portion.

  As described above, according to the present invention, the stirring resistance of the continuously variable transmission mechanism can be reduced.

FIG. 1 is a front view of a continuously variable transmission mechanism of a continuously variable transmission according to an embodiment of the present invention. 2 is a cross-sectional view of a continuously variable transmission according to an embodiment of the present invention, and is a cross-sectional view taken along the line II-II of FIG. 1 of the continuously variable transmission housed in a transmission case. FIG. 3 is a diagram showing the direction of oil flow in the continuously variable transmission mechanism according to one embodiment of the present invention.

A continuously variable transmission according to an embodiment of the present invention includes a transmission case in which an oil storage portion in which oil is stored is provided at the bottom, a continuously variable transmission mechanism housed in the transmission case, and a continuously variable transmission mechanism And a mounting member for fixing the continuously variable transmission mechanism to the transmission case by being fastened to the transmission case by a plurality of fastening members, and the continuously variable transmission mechanism has a circular outer peripheral portion. And an input member to which power is input, an output member having a circular outer periphery and outputting power, and a plurality of rolling members that can roll by connecting the input member and the output member. A continuously variable transmission configured to change the gear ratio steplessly by rolling the rolling member to change the position of the contact portion between the rolling member and the input member and the output member, A partition member for partitioning the continuously variable transmission mechanism and the oil reservoir is provided below the mounting member. It has been kicked.
Thereby, the stirring resistance of the continuously variable transmission mechanism can be reduced.

Embodiments of a continuously variable transmission according to the present invention will be described below with reference to the drawings.
1 to 3 are views showing a continuously variable transmission according to an embodiment of the present invention.

First, the configuration will be described.
In FIG. 1, the continuously variable transmission 1 includes a continuously variable transmission mechanism 2. In FIG. 2, the continuously variable transmission 1 includes a transmission case 3, and the continuously variable transmission mechanism 2 is accommodated in the transmission case 3. An oil reservoir 4 is provided at the bottom of the transmission case 3, and the oil reservoir 4 stores lubricating oil O.

  The continuously variable transmission mechanism 2 includes a shaft 10, an input disk 11, an output disk 12, a fixed carrier 13, a movable carrier 14, a planetary ball 15, and a sun roller 16.

  The shaft 10 is fixed to the transmission case 3. A through hole 10A is formed in the shaft 10, and oil is introduced into the through hole 10A from an oil pump (not shown). The shaft 10 is formed with a radiation hole 10B. The radial hole 10B is formed in a direction orthogonal to the through hole 10A, and discharges oil flowing through the through hole 10A outward in the radial direction.

  The input disk 11 is formed in a cylindrical shape having a circular outer peripheral portion 11 a and is provided so as to be rotatable with respect to the shaft 10. An input shaft 5 is connected to the input disk 11, and the input shaft 5 is rotatably attached to the shaft 10 via a bearing 17A.

  The input shaft 5 is connected to a crankshaft of an internal combustion engine (not shown), and the power of the internal combustion engine is transmitted to the input disk 11 via the input shaft 5. The input disk 11 is not limited to being connected to the input disk 11, and the input disk 11 may be connected to the input shaft 5 via a planetary gear mechanism.

  The output disk 12 is formed in a cylindrical shape having a circular outer peripheral portion 12a, and is rotatable relative to the input disk 11 about a rotation center axis R1 common to the input disk 11. The output disk 12 is connected to the output shaft through a gear pair (not shown). The input disk 11 constitutes the input member of the present invention, and the output disk 12 constitutes the output member of the present invention.

 The input disk 11 and the output disk 12 have contact surfaces 11b and 12b that contact the outer peripheral curved surface 15a on the radially outer side of the planetary ball 15. The contact surfaces 11b and 12b are formed in a shape such as a concave arc surface having a curvature equivalent to the curvature of the outer peripheral curved surface of the planetary ball 15, a concave arc surface having a curvature different from the curvature of the outer peripheral curved surface, a convex arc surface, or a flat surface. ing.

  In the continuously variable transmission 1 of the present embodiment, the contact surfaces 11b and 12b are in the reference position state, that is, the rotation center axis R1 of the input disk 11 and output disk 12 and the rotation center axis R2 of the planetary ball 15 are parallel. In this state, the distance from the rotation center axis R2 to the contact surfaces 11b, 12b is formed to be equal.

  The fixed carrier 13 is fixed to the shaft 10 and cannot rotate relative to the shaft 10. A guide groove 13A is formed in the fixed carrier 13, and the guide groove 13A extends in a radial direction orthogonal to the rotation center axis R1 and opens toward the planetary ball 15.

  The movable carrier 14 is connected to the output disk 12 via a bearing 17B, and is provided so as to be rotatable relative to the output disk 12. A guide groove 14A is formed in the movable carrier 14, and the guide groove 14A extends in a radial direction orthogonal to the rotation center axis R1 and opens toward the planetary ball 15.

  The planetary ball 15 has a support shaft 15A. One end of the support shaft 15A is inserted into the guide groove 13A of the fixed carrier 13, and the other end of the support shaft 15A is inserted into the guide groove 14A of the movable carrier 14.

  The sun roller 16 is supported by the shaft 10 via a bearing 17C so as to be relatively rotatable, and a plurality of planetary balls 15 are radially arranged on the outer peripheral surface of the sun roller 16 at substantially equal intervals. Therefore, the outer surface of the sun roller 16 becomes a rolling surface when the planetary ball 15 rotates. The sun roller 16 can roll (rotate) each planetary ball 15 by its own rotation, or it can rotate along with the rolling (rotational) movement of each planetary ball 15.

  The movable carrier 14 is rotated relative to the fixed carrier 13 by an actuator (not shown). When the movable carrier 14 is relatively rotated, the support shaft 15A moves from the position where the end of the support shaft 15A on the movable carrier 14 side is inclined with respect to the rotation center axis R1 so as to approach the rotation center axis R1. 15A changes steplessly between the positions where the end of the support shaft 15A on the movable carrier 14 side tilts away from the rotation center axis R1 through a reference position parallel to the rotation center axis R1.

  Thus, the movable carrier 14 inputs the planetary ball 15 by tilting the rotation center axis R2 with respect to the rotation center axis R1 by applying a force for inclining the support shaft 15A, and rolling the planetary ball 15. The positions of the contact portions 11t and 12t with the disk 11 and the output disk 12 are changed. The contact portions 11 t and 12 t are constituted by the outer peripheral curved surface 15 a of the planetary ball 15 and the contact surfaces 11 b and 12 b of the input disk 11 and the output disk 12.

  Thus, the distance r1 from the rotation center axis R2 of the support shaft 15A to the contact portion 11t between the input disk 11 and the planetary ball 15 (the rotation radius of the planetary ball 15 at the contact portion 11t) and the rotation center axis R2 of the support shaft 15A. To the contact portion 12t between the output disk 12 and the planetary ball 15 (the radius of rotation of the planetary ball 15 at the contact portion 12t) changes.

  As shown in FIG. 2, when the support shaft 15A is inclined with respect to the rotation center axis R1, the rotation radii r1 and r2 of the planetary ball 15 have the same radius, so the input disk 11 and the output disk 12 are the same. And the gear ratio is 1.

  When the support shaft 15A is inclined with respect to the rotation center axis R1, the distance between r1 and r2 changes, and the gear ratio is changed accordingly. For example, when the end of the support shaft 15A on the movable carrier 14 side is inclined so as to approach the rotation center axis R1, r2 is larger than r1, and therefore the rotational speed of the output disk 12 with respect to the input disk 11 is higher. Increased speed.

  On the other hand, when the end of the support shaft 15A on the side of the movable carrier 14 is inclined so as to move away from the rotation center axis R1, r2 is smaller than r1, and therefore the rotational speed of the output disk 12 with respect to the input disk 11 is reduced. Decelerated.

  As described above, the continuously variable transmission 1 of the present embodiment changes the position of the contact portions 11t and 12t between the planetary ball 15 and the input disk 11 and the output disk 12 by changing the inclination of the support shaft 15A. Can be changed steplessly.

  Oil discharge holes 11A and 12A are formed in the input disk 11 and the output disk 12, respectively. The oil discharged from the radiation hole 10B of the shaft 10 into the space surrounded by the input disk 11 and the output disk 12 is contact portions 11t and 12t between the planetary ball 15 and the input disk 11 and the output disk 12, bearings 17 and 18, etc. Then, the oil is discharged from the oil discharge holes 11A and 12A and the contact portions 11t and 12t by the centrifugal force generated by the rotation of the input disk 11 and the output disk 12. In FIG. 2, the oil O1 discharged from the oil discharge holes 11A and 12A is indicated by an arrow.

  The continuously variable transmission mechanism 2 is provided with ring-shaped mounting plates 7 and 8. The mounting plates 7 and 8 are installed to extend in the circumferential direction outward in the radial direction from the outer peripheral portion 11a of the input disc 11 and the outer peripheral portion 12a of the output disc 12 (see FIG. 2). It is fastened with bolts that do not.

  The mounting plates 7 and 8 are fixed to the transmission case 3 by a plurality of bolts 20, and the bolts 20 are provided along the circumferential direction of the mounting plates 7 and 8. Thereby, the continuously variable transmission mechanism 2 is attached to the transmission case 3 via the attachment plates 7 and 8. The mounting plates 7 and 8 of the present embodiment constitute the mounting member of the present invention, and the bolt 20 constitutes the fastening member of the present invention.

  A pair of partition plates 21A and 21B are provided below the mounting plates 7 and 8, and the partition plates 21A and 21B are curved along the outer peripheral portion 11a of the input disk 11 and the outer peripheral portion 12a of the output disk 12. Yes. The partition plates 21 </ b> A and 21 </ b> B partition the lower part of the input disk 11 and the output disk 12 and the oil storage part 4. The partition plates 21A and 21B of the present embodiment constitute the partition member of the present invention.

  1 and 2, the mounting plates 7 and 8 are provided with partition walls 22A and 22B. Although only the partition 22A on the output disk 12 side is shown in FIG. 1, the partition 22B provided on the input disk 11 side is provided with the same shape and the same shape as the partition 22A.

  The partition wall 22A is located upstream of the bolt 20 in the rotational direction R of the input disk 11 and the output disk 12, and the outer peripheral portion of the output disk 12 covers the circumferential side surface 20a of the head 20A of the bolt 20. Is inclined outward in the radial direction of the bolt 20.

  In the partition wall 22 </ b> A of this embodiment, the partition wall 22 </ b> A is attached to the mounting plate 7 so that the inclination angle θ of the partition wall 22 </ b> A is an acute angle with respect to the tangent 6 of the output disk 12. In addition to the partition wall 22A and the circumferential side surface 20a of the head portion 20A of the bolt 20, the partition walls 22A and 22B extend from the outer peripheral portion of the output disk 12 to the bolt 20 so as to cover the outer end surface in the radial direction of the head portion 20A. You may incline toward the radial direction outward. The circumferential side surface 20a of the present embodiment constitutes the circumferential side surface of the fastening member of the present invention.

  The partition wall 22B provided in the input disk 11 is a nut that is fastened to the bolt 20 or a radially outer side of the bolt 20 from the outer peripheral portion of the input disk 11 so as to cover the circumferential side surface of the shaft portion 20B of the bolt 20. It is inclined toward.

  A partition wall 23 is provided on the mounting plate 7. The partition wall 23 is provided between the outer peripheral portion 12 a of the output disk 12 and the bolt 20, and the partition wall 23 extends along the outer peripheral portion 12 a of the input disk 11.

  A guide wall 24 is provided on the mounting plate 7. The guide wall 24 extends in a curved manner from the outer peripheral portion 12 a of the output disk 12 toward a lubricating portion such as a gear or a rotary shaft bearing installed around the continuously variable transmission mechanism 2. In this embodiment, the partition walls 22A and 22B constitute the first partition wall of the present invention, and the partition wall 23 constitutes the second partition wall of the present invention.

  The partition wall and guide wall provided on the input disk 11 side are provided in the same position and in the same shape as the partition wall 23 and guide wall 24 provided on the output disk 12.

The continuously variable transmission 1 of the present embodiment includes a transmission case 3 in which an oil storage portion 4 in which oil O is stored is provided at the bottom, a continuously variable transmission mechanism 2 accommodated in the transmission case 3, and a continuously variable transmission. Mounting plates 7 and 8 are provided integrally with the fixed carrier 13 of the transmission mechanism 2 and fastened to the transmission case 3 by a plurality of bolts 20 to fix the continuously variable transmission mechanism 2 to the transmission case 3. In addition, partition plates 21 </ b> A and 21 </ b> B that partition the continuously variable transmission mechanism 2 and the oil reservoir 4 are provided below the mounting plates 7 and 8.
Thereby, the input disk 11 and the output disk 12 can be prevented from being immersed in the oil O, and the stirring resistance of the continuously variable transmission mechanism 2 can be reduced.

  Further, by providing the partition plates 21A and 21B on the mounting plates 7 and 8 provided integrally with the continuously variable transmission mechanism 2, when the continuously variable transmission mechanism 2 is assembled to the transmission case 3, the partition plates 21A and 21B The oil reservoir 4 can be easily positioned. For this reason, the workability of the mounting work of the continuously variable transmission 1 can be improved.

  Further, according to the continuously variable transmission 1 of the present embodiment, the mounting plates 7 and 8 extend in the circumferential direction outward in the radial direction from the outer peripheral portion 11 a of the input disk 11 and the outer peripheral portion 12 a of the output disk 12. The bolts 20 are provided along the circumferential direction of the mounting plates 7 and 8.

  Further, the mounting plates 7 and 8 have partition walls 22A and 22B. The partition walls 22A and 22B are located upstream of the bolt 20 in the rotational direction of the input disk 11 and the output disk 12, and the head of the bolt 20 Inclined from the outer peripheral portions 11a and 12a of the input disc 11 and the output disc 12 toward the outer side in the radial direction of the bolt 20 so as to cover the side surface 20a in the circumferential direction of 20A or the side surface in the circumferential direction of the shaft portion 20B. Yes.

  As a result, as shown in FIG. 3, the oil O2 discharged from the oil discharge holes 11A and 12A and the contact portions 11t and 12t by the centrifugal force generated by the rotation of the input disk 11 and the output disk 12 is transferred along the partition wall 22 to the input disk. 11 and the output disk 12 can be discharged radially outward.

  For this reason, it is possible to prevent oil having a high flow velocity from colliding with the head 20A and the shaft 20B of the bolt 20 and scattering. Therefore, it is possible to prevent the scattered oil from colliding with the input disk 11 and the output disk 12, and it is possible to prevent the stirring resistance of the continuously variable transmission 1 from increasing due to the oil.

  Further, according to the continuously variable transmission 1 of the present embodiment, the partition wall 23 is provided between the outer peripheral portions 11 a and 12 a of the input disk 11 and the output disk 12 and the bolt 20. And it extends along the outer peripheral portions 11a and 12a of the output disk 12.

  As a result, the oil O3 discharged from the oil discharge holes 11A and 12A and the contact portions 11t and 12t can collide with the partition wall 23, and the oil having a high flow velocity collides with the head 20A and the shaft portion 20B of the bolt 20. It is possible to prevent scattering. For this reason, it can prevent more effectively that the scattered oil collides with the input disk 11 and the output disk 12, and can prevent more effectively the stirring resistance of the continuously variable transmission 1 by oil. .

  Further, according to the continuously variable transmission 1 of the present embodiment, the mounting plates 7 and 8 have the guide wall 24, and the guide wall 24 is continuously variable from the outer peripheral portions 11 a and 12 a of the input disk 11 and the output disk 12. It extends toward the lubrication part 25 installed around the mechanism 2.

  Thereby, the oil O4 discharged from the oil discharge holes 11A, 12A and the contact portions 11t, 12t can be guided to the lubrication portion 25 along the guide wall 24. For this reason, a dedicated oil supply structure for supplying oil to the lubrication part 25 can be eliminated, and the configuration of the continuously variable transmission 1 can be simplified.

  Further, by guiding the oil O3 having a high flow velocity along the guide wall 24 to the lubricating portion 25, it is possible to prevent the oil 20 from colliding with the head 20A and the shaft portion 20B of the bolt 20 and scattering. For this reason, it can prevent more effectively that the scattered oil collides with the input disk 11 and the output disk 12, and can prevent more effectively the stirring resistance of the continuously variable transmission 1 by oil. .

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

  1 ... continuously variable transmission, 2 ... continuously variable transmission mechanism, 3 ... transmission case, 4 ... oil reservoir, 7, 8 ... mounting plate (mounting member), 11. ... Input disk (input member), 11a ... outer peripheral part (outer peripheral part of input member), 11t ... contact part (contact part between rolling member and input member), 12 ... output disk (output member) ), 12a ... outer peripheral part (outer peripheral part of the output member), 12t ... contact part (contact part between the rolling member and the output member), 15 ... planetary ball (rolling member), 20. . Bolt (fastening member), 20a ... side face (side face in the circumferential direction of the fastening member), 21A, 21B ... partition plate (partition member), 22A, 22B ... partition wall (first partition wall), 23 ... partition wall (second partition wall), 24 ... guide wall, 25 ... lubrication part

Claims (4)

A transmission case provided at the bottom with an oil reservoir for storing oil;
A continuously variable transmission mechanism housed in the transmission case;
An attachment member that is provided integrally with the continuously variable transmission mechanism and is fastened to the transmission case by a plurality of fastening members, thereby fixing the continuously variable transmission mechanism to the transmission case;
The continuously variable transmission mechanism has an input member to which power is input, an output member that outputs power, and a plurality of rolling members that can roll by connecting the input member and the output member;
A continuously variable transmission configured to change the speed ratio steplessly by rolling the rolling member to change the position of the contact portion between the rolling member and the input member and the output member. There,
A continuously variable transmission, wherein a partition member that partitions the continuously variable transmission mechanism and the oil storage portion is provided below the mounting member. The input member and the output member have a circular outer periphery,
The mounting member is installed to extend in the circumferential direction radially outward from the outer peripheral portion of the input member and the outer peripheral portion of the output member,
The fastening member is provided along the circumferential direction of the mounting member,
The mounting member has a partition, and the partition is located upstream of the fastening member in the rotation direction of the input member and the output member, and covers at least a circumferential side surface of the fastening member. The continuously variable transmission according to claim 1, wherein the continuously variable transmission is inclined from an outer peripheral portion of at least one of the input member and the output member toward a radially outward direction of the fastening member. When the partition wall is a first partition wall, a second partition wall is provided between at least one outer peripheral portion of the input member and the output member and the fastening member,
The continuously variable transmission according to claim 1 or 2, wherein the second partition wall extends along outer peripheral portions of the input member and the output member.  The mounting member has a guide wall, and the guide wall extends from an outer peripheral portion of at least one of the input member and the output member toward a lubrication portion installed around the continuously variable transmission mechanism. The continuously variable transmission according to any one of claims 1 to 3, wherein the continuously variable transmission is provided.

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