JP4759824B2 - Toroidal continuously variable transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a toroidal-type continuously variable transmission used, for example, in an automobile transmission.
[0002]
[Prior art]
A toroidal type continuously variable transmission is used for an automatic transmission of an automobile.
[0003]
In such a toroidal-type continuously variable transmission, a pair of power rollers is sandwiched between the pair of power rollers, as disclosed in, for example, Japanese Patent No. 2734583 or Japanese Patent Laid-Open No. 5-39850. A structure combining input and output disks is used. Specifically, the traction surface of each disk is formed in a concave shape obtained by an arc centering on the swing axis of the power roller, and when the power roller is tilted, the power roller and the input / output disk The rotation speed ratio is changed by changing the rotation radius ratio of the contact point.
[0004]
In the toroidal type continuously variable transmission, in order to ensure traction, the power transmission between each disk and the power roller is performed by interposing an oil film between them and transmitting the power by the shear force of the oil film. .
[0005]
For this reason, a variator configured with power rollers and input / output disks employs a unique lubrication system for toroidal continuously variable transmissions, in which lubricating oil is finally delivered to the traction surface of each disk. Yes.
[0006]
Conventionally, in this lubrication system, a collecting portion for collecting lubricating oil is formed below the variator, and an oil passage through which the lubricating oil passes is formed in the variator. Then, the lubricating oil that has flowed out of the oil passage is caused to flow out to the traction surface of the input / output disk or to the traction surface of the power roller.
[0007]
For example, an ejection hole facing the traction surface of each disk is arranged on the upper side or the lower side of each disk as disclosed in JP-A-11-511141 and JP-A-11-210855. A structure in which lubricating oil is directly jetted onto the traction surface is a typical example.
[0008]
[Problems to be solved by the invention]
In order to maintain stable performance in such a toroidal-type continuously variable transmission, it is required to prevent foreign matters mixed in the lubricating oil from being caught in the rolling contact point between each disk and the power roller.
[0009]
For this reason, conventionally, in the toroidal type continuously variable transmission, a structure in which a line filter is incorporated on the suction side of the oil pump to remove foreign substances having a size larger than a specified size is employed.
[0010]
However, the line filter on the suction side may not be completely removed.
[0011]
For example, when assembling the transmission, if foreign matter such as dust enters the oil passage from the line filter to the ejection hole, or if burrs are left after drilling in the opening of the oil passage, these foreign matter Before passing through the filter, it is ejected to the traction surface of each disk and the traction surface of the power roller.
[0012]
In addition, metal foreign matters remaining in the oil of the oil pan may be ejected to the traction surface without being completely removed by the line filter.
[0013]
In such a case, there is a possibility that foreign matter may bite into the rolling contact point of the disk or power roller. Even if foreign matter falls into the lubricating oil that has accumulated in the lower part of the variator without being caught, foreign matter in the oil (including foreign matter already in the lubricating oil in the collecting part) Along with the lubricating oil in the collecting portion that is violated by the internal vibration and scraped up by the disc, there is a risk that it will be caught again in the traction surface of the disc or power roller.
[0014]
Such biting of foreign matter reduces the life of the input / output disk and the power roller.
[0015]
SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide a toroidal continuously variable transmission that can remove foreign matters existing in a section from a line filter to an ejection hole before being ejected to a traction surface.
[0016]
A second object is to provide a toroidal continuously variable transmission that can remove metal foreign matters that could not be removed by the line filter.
[0017]
A third object is to provide a toroidal continuously variable transmission that prevents foreign matter from being scraped up from the collecting portion to the traction surface.
[0018]
[Means for Solving the Problems]
The toroidal continuously variable transmission has a variator and a lubrication system. The variator outputs the rotation of the input disk by sandwiching the power roller between the input disk and the output disk that are placed facing each other and tilting the power roller to change the contact point between the input disk, the output disk, and the power roller. The transmission ratio when transmitting to the disc is changed steplessly. The lubrication system is assembled to the variator and constitutes an oil path through which the lubricating oil after passing through the line filter flows out to the traction surface of the input disk and output disk and the traction surface of the power roller. The lubrication system includes a first system, a second system, and a third system. The first system injects lubricating oil from the injection holes into the traction surface of the input disk and output disk and the traction surface of the power roller through the support post held in the center of the cavity composed of the input disk and output disk. It is a system to do. The second system is a system that discharges lubricating oil from an ejection hole that opens to the outer periphery of the shaft portion through an eccentric shaft having a shaft portion that rotatably supports the power roller. The third system discharges lubricating oil from an injection hole opened in the peripheral wall of the input shaft through the input shaft passing through the rotation center of the input disk and the output disk and through the drive shaft member connected to the input shaft. It is a system. And the flow of the secondary filter and the lubricating oil installed so as to block the oil passage in at least one upstream portion of the first system ejection hole, the second system ejection hole, and the third system ejection hole is not impaired. Install at least one of the magnet members attached to.
[0019]
The first system ejection holes are formed on the outer peripheral surface of the ejection head fastened to the front end of the support post by a bolt member, and communicate with a hole formed from the front end of the bolt member to the vicinity of the head. At least one of the secondary filter and the magnet member is inserted into the hole of the bolt member.
[0020]
The second system injection hole communicates with a passage formed in the shaft portion of the eccentric shaft. At least one of the secondary filter and the magnet member is inserted into the shaft passage.
[0021]
The third system ejection holes are provided at a plurality of locations along the axis of the input shaft. At least one of the secondary filter and the magnet member is inserted into an oil passage near the connection portion between the input shaft and the drive shaft member that is the most upstream side of the plurality of ejection holes.
[0022]
  A secondary filter having a coarser mesh than the line filter is employed.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
[0025]
  1 shows a variator 10 constituting the main part of a double-cavity half-toroidal continuously variable transmission to which the present invention is applied, FIG. 2 shows a cross section taken along line AA in FIG. Shows a cross section along the line BB in FIG. The variator 10 has an oil pad at the bottom.8It is housed in a mission case 9 (partially shown by a two-dot chain line in FIG. 1) formed with (corresponding to a collecting part for collecting lubricating oil). The variator 10 includes an input disk 12 a and an output disk 13 a that constitute the first cavity 11, and an input disk 12 b and an output disk 13 b that constitute the second cavity 14.
[0026]
A pair (here, two) of power rollers 15a and 15b are provided between the input / output disks 12a and 13a. The outer peripheral surfaces of the power rollers 15a and 15b are sandwiched between the traction surfaces of the input / output disks 12a and 13a. A pair (two here) of power rollers 15c and 15d are also provided between the input / output disks 12b and 13b. The outer peripheral surfaces of the power rollers 15c and 15d are sandwiched between the traction surfaces of the input / output disks 12b and 13b.
[0027]
As shown in FIG. 2, the power rollers 15a and 15b are rotatably attached to the respective crank-shaped eccentric shafts 18 that are rotatably implanted in the trunnions 17a and 17b via the needle bearings 1 using the needle bearings 2. is there. The power rollers 15 c and 15 d have the same structure, and are rotatably attached to the crank-shaped eccentric shaft 18 that is rotatably inserted into the trunnions 17 c and 17 d via the needle bearing 1 using the needle bearing 2.
[0028]
Each trunnion 17a-17d has a pair of trunnion shafts 19 at the upper and lower portions sandwiching the power rollers 15a-15d as shown in FIG. Each trunnion shaft 19 is connected by a frame-shaped link 20 so as to face each other diagonally, and the reaction force generated when pressing the power rollers 15a to 15d is canceled. However, the front end portion and the root portion of each trunnion shaft 19 are supported by the bearing portion 5 so as to be rotatable and swingable with respect to the vertical link 20.
[0029]
Between each power roller 15a-15d and each trunnion 17a-17d, it is supported via the power roller bearing 25 comprised combining the thrust ball bearing 27 and the thrust bearing 28, respectively. It is structured to withstand the thrust force generated when pressing 15d.
[0030]
  The input disk 12a, 1As shown in FIG. 3, an input shaft 30 formed of a hollow shaft passes through the central portion of 2b and the output disks 13a and 13b. One end of the input shaft 30 is connected to a drive shaft member 31 coaxial with the input shaft 30 via a rolling bearing 33 and a cam disk 51. The drive shaft member 31 is a member to which drive force from a drive source such as an engine (not shown) is input.
[0031]
The input shaft 30 has a ball spline 34 at one end and a ball spline 37 and an elastic receiver 35 (consisting of a loading nut 36a, a disc spring 36b, etc.) at the other end. The input disk 12a is attached to the input shaft 30 so as to be movable in the axial direction while being prevented from rotating by the ball spline 34. Similarly, the input disk 12 b is attached to the input shaft 30 so as to be movable in the axial direction while being prevented from rotating by the ball spline 37.
[0032]
  The output disk 13a is disposed between the input disks 12a and 12b so that the output disk 13a faces the input disk 12a and the output disk 13b faces the input disk 12b. These output disks 13a and 13b are rotatably supported on the outer periphery of the input shaft 30 via bearings 40 and 41, respectively. These output disks 13a and 13b are connected by a cylindrical connecting member 42 interposed therebetween. The rotation from the output disks 13a and 13b is output from an output gear 43 provided on the outer peripheral portion of the connecting member 42. The output gear 43 includes a gear of an output shaft (not shown).44Are engaged. Reference numeral 44 a denotes a housing that covers the periphery of the output gear 43.
[0033]
A loading cam mechanism 50 is assembled on the back side of the input disk 12a. The loading cam mechanism 50 has cam surfaces 54 and 55 formed on the side surface of the cam disk 51 facing each other and the back surface of the input disk 12a, and a roller 52 is sandwiched between the cam surfaces 54 and 55.
[0034]
  ThisDynamic shaftWhen the material 31 rotates, the cam disk 51 is rotated, and the input disk 12a is rotated together with the cam disk 51 while being pressed toward the output disk 13a by the wedge action provided by the rollers 52 sandwiched between the cam surfaces 54 and 55. To do. Further, a reaction force received by the cam disk 51 is applied to the input shaft 30 via the rolling bearing 33, and the input disk 12b is pressed toward the output disk 13b. That is, the rotation of the input disks 12 a and 12 b is transmitted from both ends of the input shaft 30 to the output disks 13 a and 13 b via the power rollers 15 a to 15 d and output from the output gear 43.
[0035]
On the other hand, a valve unit 60 installed in the mission case 9 is installed below the power rollers 15a to 15d. The valve unit 60 is configured, for example, such that a hydraulic piston mechanism 62 is housed in each of the power rollers 15a to 15d in a pair of valve bodies 61 assembled in the mission case 9 following the row of power rollers 15a to 15d. . Specifically, each hydraulic piston mechanism 62 is configured by accommodating a hydraulic piston 64 in a flat cylinder 63 so as to be movable along a trunnion axis. When each hydraulic piston 64 is connected to the lower trunnion shaft 19 via a drive rod 63a, and when hydraulic pressure is applied to one or the other of the cylinder chambers formed on both sides of the hydraulic piston 64, each trunnion 17a to 17n. 17d is moved up and down. At this time, the power rollers 15a to 15d are tilted (due to the moment generated at the contact point) by the offset of the power rollers 15a and 15d with respect to the rotation centers of the disks 12a, 12b, 13a and 13b. Then, the rotation radius ratio changes at the contact point between the power rollers 15a and 15b and the input / output disks 12a and 13a, and the rotation at the contact point between the power rollers 15c and 15d and the input / output disks 12b and 13b. The gear ratio can be changed by changing the radius ratio. The trunnion shaft 19 is assembled with a synchronization mechanism 68 using, for example, an endless wire 66 and a pulley 67 so that the tilting operations of the power rollers 15a to 15d are synchronized.
[0036]
In the toroidal type continuously variable transmission, as shown in FIG. 1, a lubrication system 70 that lubricates a sliding portion requiring lubrication is assembled. In addition, an oil film is interposed between each of the disks 12a, 12b, 13a, 13b and the power rollers 15a to 15d using this lubrication system 70 so that power is transmitted by the shear force of the oil film.
[0037]
  The lubrication system 70 includes, for example, an engine-driven oil pump 71 having a line filter 71a on the suction side.8A structure is used in which the collected lubricating oil is sucked up and pumped to a plurality of systems.
[0038]
Specifically, the lubrication system 70 is, for example,
a. A first system for supplying lubricating oil directly from above the variator 10 to the traction surfaces of the disks 12a, 12b, 13a, 13b and the power rollers 15a-15d.
[0039]
b. A second system in which the lubricating oil is guided to the bearing portions of the trunnion shafts 19 and the bearing portions of the power rollers 15a to 15d and then flows out to the traction surfaces of the disks 12a, 12b, 13a, and 13b.
[0040]
c. A third system that guides the lubricating oil through the input shaft 30 to the bearing portion of each disk 12a, 12b, 13a, 13b and then flows out to the traction surface of each disk 12a, 12b, 13a, 13b.
[0041]
There is.
[0042]
In the first system, as shown in FIGS. 1 and 2, the lubricating oil is supplied to each of the variator 10 through a support post 73 that supports the upper link 20 at the center of the cavity so as to be displaceable from the upper wall of the transmission case 9. It is a system that ejects to the traction surface.
[0043]
  Specifically, the tip of the support post 73 penetrates the link 20. A stopper 75 (which restricts excessive movement of the trunnions 17a to 17d) is fixed to the penetrating end by a bolt member 74. In order to eject the lubricating oil through this portion, the bolt member 74 is a member in which a hole 74c is formed from the tip end of the shaft portion 74a to a point near the head portion 74b, and the head portion 74b and the end of the support post 73 are further connected. An ejection head 76 that is fastened together with the stopper 75 is interposed therebetween. Specifically, as shown in FIG. 4, a plurality of obliquely downward ejection holes 77 facing the traction surface of each power roller and the traction surface of the disk are formed on the outer peripheral surface of the ejection head 76. thisEruptionThe oil passage continuing from the hole 77 communicates with the hole 74c (both oil passages) of the shaft portion 74a through the annular gap 79b and the through hole 74d formed at the base of the shaft portion 74a. And the front-end | tip part of the axial part 74a is connected with the discharge part of the oil pump 71 via the channel | path 72a, respectively, so that the lubricating oil after passing the line filter 71a may be injected toward a traction surface, respectively. It is. Reference numeral 76a denotes a disc spring that prevents the bolt member 74 from coming off.
[0044]
The second system passes through the valve body 61 as shown in FIGS. 1 and 2 and passes the lubricating oil through the inside of the drive rod 63a, the inside of the lower trunnion shaft 19, and the trunnions 17a to 17d in order. This is a system in which the thrust bearing 28 and the needle bearing 2 are passed through in order to flow out to the traction surface.
[0045]
More specifically, passages 80a are formed in the drive rod 63a and the lower trunnion shaft 19 so as to communicate with each other and extend in the axial direction. The passages from the outlet of the passage 80a to the needle bearing 1 are formed in the trunnions 17a to 17d. 80b is formed, and in the shaft portion 18c (the shaft portion supporting each of the power rollers 15a to 15d) on the distal end side of the eccentric shaft 18, an ejection hole 80d opened from the middle of the passage 80b to the outer periphery of the shaft portion. A leading passage 80c is formed. The inlet of the passage 80a is communicated with the discharge portion of the oil pump 71 through the passage 72b, and the lubricant discharged from the oil pump 71, that is, the lubricant after passing through the line filter 71a, has a bearing portion. After being lubricated, it is finally discharged to the traction surface.
[0046]
As shown in FIG. 3, the third system passes the lubricating oil from the inside of the drive shaft member 31 to the inside of the input shaft 30, so that the rolling bearing 33 on the input shaft 30, ball splines 34 and 37, the connecting member 42, In this system, the bearings 40 and 41 are supplied to the traction surface, respectively.
[0047]
Specifically, the inside of the drive shaft member 31 communicates with the discharge portion of the oil pump 71 via the passage 72c. Further, the drive shaft member 31 and the input shaft 30 arranged in series are sealed with each other via a seal member 81. Further, a plurality of groove portions 82 a are formed on the outer peripheral surface portion of the input shaft 30 from the one bearing 40 to the other bearing 41 through the connecting member 42. And the passage 82b which connects the inside of the input shaft 30 and these each part is each formed in the point corresponding to the rolling bearing 33, the ball spline 34, the groove part 82a, and the ball spline 37 among the surrounding walls of the input shaft 30. Thus, the lubricating oil discharged from the oil pump 71 (lubricating oil after passing through the line filter 71a) lubricates the respective bearing portions, and finally flows out to the traction surface.
[0048]
At each outlet side of each of these lubrication systems, there is a filter for removing foreign matters (such as dust that has entered during assembly or generated by leaving flashes during machining) in the section from the line filter 71a to the outlet side. Is provided.
[0049]
  Specifically, in the first system, as shown in FIG. 4, a step is formed at a point upstream of the oil passage near the ejection hole 77, for example, a hole portion of the bolt member 74 near the ejection head 76. In addition, for example, a mesh type secondary filter 84a (surface type filter: equivalent to a secondary filter;84aIs installed). For this filter 84a, a filter member (for example, about 50 to 200) having a coarser mesh than that of a mesh (about 150 to 200) used for a line filter is usually used. Further, the upstream portion of the oil passage near the ejection hole 77, for example, the bottom portion in the bolt member 74 forming the oil passage portion that changes the flow of the lubricating oil immediately after the filter 84a, impairs the flow of the lubricating oil. A flat magnet member 85a (magnetic filter) is attached so as not to be present.
[0050]
In the second system, as shown in FIG. 5, a step is formed at a point on the upstream side of the oil passage near the ejection hole 80d, for example, a hole portion near the ejection hole 80d of the passage 80c of the eccentric shaft 18, For example, a mesh type filter 84b (surface type filter: equivalent to a secondary filter) having the same function as the previous filter 84a is installed so as to close the passage. Further, a flat magnet member 85b is provided along the wall surface on the upstream side of the oil passage near the ejection hole 80d, for example, on the wall surface of the passage having a small diameter immediately after the filter 84b so as not to impair the flow of the lubricating oil. (Magnetic filter) is attached.
[0051]
  In the third system, as shown in FIG. 6, among the passages 82 b serving as the ejection holes, the passages are blocked at the upstream side of the oil passage closest to the upstream passage 82 b, for example, at the tip of the drive shaft member 31. For example, a mesh type filter 84c (surface type filter: equivalent to a secondary filter) having the same function as the previous filter 84a is installed. This passage82bBy providing the filter 84c before (upstream side), foreign matter is prevented from being mixed into the lubricating oil applied to the rolling bearing 33. Further, the upstream surface of the oil passage closest to the passage 82b (outlet side) closest to the line filter 71a, for example, the wall surface of the passage having a small diameter immediately after the filter, has a wall surface so as not to impair the flow of the lubricating oil. A flat magnet member 85c (magnetic filter) is attached along the line.
[0052]
  Further, as shown in FIG. 1, a cover member 86 is provided below each of the disks 12a, 12b, 13a, 13b. As the cover member 86, a plate member having a substantially U-shaped cross section is used as shown in FIG. The outer shape of the cover member 86 has a substantially fan shape that is continuous with the disk shape, and the closed side isinputIt is placed close to the lower circular arc area of the disk 12a, and the open side is the oil pad.8It extends toward the lubricating oil accumulated in the tank. By this cover member 86,inputThe entire area below the disk 12a is covered and concealed.
[0053]
The filters 84a to 84c, the magnet members 85a to 85c, and the cover member 86 protect the variator 10 from foreign matters in the oil, in particular, foreign matters remaining before the lubricating oil is injected from the line filter 71a.
[0054]
That is, as the flow of the lubricating oil, the oil pump 71 is operated to suck up the lubricating oil in the oil pan 8 with the operation of the toroidal type continuously variable transmission. Then, the lubricating oil from the oil pump 71 that has passed through the line filter 71a is divided for each lubrication system, and a part thereof is in the bolt member 74, through the ejection head 76, and from the ejection holes 77 to the respective disks 12a, 12b, 13a, 13b. To the traction surfaces of the power rollers 15a to 15d. Further, a part passes through each drive rod 63, each trunnion shaft 19 and each trunnion 17a to 17d, and flows out to the traction surface while lubricating the needle bearing 1, the thrust bearing 28, and the needle bearing 2. Further, a part passes through the drive shaft member 31, the input shaft 30, and the passages 82b, and flows out to the traction surface while lubricating the rolling bearing 33, the ball splines 34 and 37, the connecting member 42, and the bearings 40 and 41, respectively. .
[0055]
At this time, it is assumed that the foreign matter that remains in the section from the line filter 71a to the outlet and remains in the dust at the time of assembly and the flash at the time of machining remains.
[0056]
At this time, the oil passage (first system) near the ejection hole 77 includes the filter 84a and the magnet member 85a, and the oil path (second system) near the ejection hole 80d includes the filter 84b and the magnet member. 85b, and the oil passage (third system) of the most upstream side passage 82b includes a filter 84c and a magnet member 85c.
[0057]
For this reason, the foreign material at the time of an initial assembly is removed by each filter 84a-84c. Moreover, fine metal foreign matters that could not be removed by the line filter 71a are removed by adsorption by the magnet members 85a to 85c.
[0058]
Thereby, it is possible to prevent foreign matters at the time of initial assembly and metallic foreign matters from being caught in the rolling contact points of the disks 12a, 12b, 13a, 13b and the power rollers 15a to 15d. Of course, the foreign matter mixed in the lubricating oil sucked up from the oil pan 8 is also removed.
[0059]
Therefore, the traction surfaces of the disks 12a, 12b, 13a, and 13b and the power rollers 15a to 15d are protected from foreign matters, and the life can be improved. Moreover, by using two filters (surface filter, magnetic filter) in combination, there are more foreign substances in the oil, and even fine metal foreign objects that cannot be removed by the surface filter can be removed, so the removal of foreign substances is effective. Can be done. In particular, the filters 84a to 84c employ a coarser mesh than the line filter 71a, so that the filters 84a to 84c are not clogged with foreign substances during transmission operation (if the finer than the line filter 71a, the filter 84a to 84c gradually increases during operation of the transmission). There is a possibility that foreign matter will accumulate, filter clogging and lubricating oil will not be supplied to the traction surface).
[0060]
In addition, if each filter is installed at the lubricating oil inlet of a part such as a bearing that requires lubrication in the oil passage as in the second system or the third system and foreign matter is removed from the same part, the It is possible to prevent foreign matter from being caught on the rolling surface, and to improve the life of parts and members having the rolling surface such as a bearing.
[0061]
On the other hand, it is assumed that the foreign matter has fallen into the lubricating oil accumulated in the oil pan 8 below the variator.
[0062]
Here, the traction surfaces of the disks 12a, 12b, 13a, and 13b are exposed portions unlike the rolling surfaces that are covered with other bearings and the like. There is a possibility that the oil level may be violated by vibration during transmission operation, and may be caught in the traction surface of the disk or power roller.
[0063]
At this time, the lower side of each disk 12a, 12b, 13a, 13b is covered with a cover member 86.
[0064]
As a result, the lubricating oil from the upper side adheres to the cover member 86 and flows down through the cover surface as it is, and the lubricating oil in the oil pan 8 is restrained by the cover member 86 even if it goes wild and does not rise upward. The phenomenon that the disk scoops up the dirty lubricating oil is suppressed.
[0065]
  Therefore, the foreign matter in the oil can be prevented from being bitten, and the traction surface can be protected from the dirty lubricating oil. The effect of suppressing the scraping by the cover member 86 is very high, and the effect of protecting the traction surface is sufficiently achieved by the combined use of the surface type filter and the magnetic type filter. In addition, since the amount of oil around the disk is reduced by suppressing the scraping action of the lubricating oil, the stirring resistance of each disk 12a, 12b, 13a, 13b is reduced.ButThere is also the advantage that the efficiency of power transmission is reduced and increased.
[0066]
8 (a) to 8 (e) show second to sixth embodiments of the present invention.
[0067]
Each embodiment has shown the example of installation of a different magnet member 85a in the 1st system.
[0068]
  Specifically, the second embodiment shown in FIG.injectionA flat magnet member 85a is attached to the wall surface of a hole portion 77a that relays between the ejection holes 77 of the head 76 and extends in a direction perpendicular to the axial center direction of the bolt member 74 along the wall surface. An example is shown.
[0069]
The third embodiment shown in FIG. 8B shows an example in which a flat magnet member 85a is attached to a small-diameter through hole wall surface formed immediately after the filter 84a. .
[0070]
The fourth embodiment shown in FIG. 8C shows an example in which a magnet member 85a formed in a coil shape is accommodated in a small-diameter through hole formed immediately after the filter 84a.
[0071]
In the fifth embodiment shown in FIG. 8D, a flat magnet member 85a is attached to the wall surface of the large-diameter through hole formed on the front side of the filter 84a along the wall surface. Is shown.
[0072]
The sixth embodiment shown in FIG. 8E shows an example in which a magnet member 85a formed in a coil shape is housed in a large-diameter through hole formed on the front side of the filter 84a.
[0073]
Even if it does in this way, there exists an effect similar to 1st Embodiment.
[0074]
FIGS. 9A to 9C show seventh to ninth embodiments of the present invention.
[0075]
Each embodiment has shown the example of installation of the different magnet member 85b in a 2nd system | strain.
[0076]
Specifically, the seventh embodiment shown in FIG. 9A shows an example in which a magnet member 85b formed in a coil shape is housed in a small-diameter passage formed on the rear side of the filter 84b. ing.
[0077]
The eighth embodiment shown in FIG. 9B shows an example in which a flat magnet member 85b is attached to the wall surface of a large-diameter passage formed on the front side of the filter 84b.
[0078]
The ninth embodiment shown in FIG. 9C shows an example in which a magnet member 85b formed in a coil shape is housed in a large-diameter passage formed on the front side of the filter 84b.
[0079]
Even if it does in this way, there exists an effect similar to 1st Embodiment.
[0080]
FIG. 10 shows a tenth embodiment of the present invention.
[0081]
The present embodiment shows an installation example of different magnet members 85c in the third system.
[0082]
  Specifically, an example is shown in which a magnet member 85c formed in a coil shape is housed in a passage portion having a small diameter immediately after the filter 84c..
  Even if it does in this way, there exists an effect similar to 1st Embodiment.
[0083]
  Further, the surface type filter is not provided together with the magnetic type filter, but a structure in which only the filter 84a is provided in the ejection head 76 as in the eleventh embodiment shown in FIG. 11, or the twelfth type shown in FIG. A structure in which only the filter 84b is provided on the eccentric shaft 18 as in the embodiment, or a filter 84c in the drive shaft member 31 as in the thirteenth embodiment shown in FIG.TakeYou may make it the structure only provided. Also, the magnetic filter 85 is only required to be in the oil passage of the lubricating oil lubrication system. In particular, if the magnetic filter 85 is installed downstream of the line filter 71a as shown by the broken line in FIG. 1, it cannot be completely removed by the line filter 71a. In addition, the metallic foreign matter can be adsorbed, and the same effect as that of the first embodiment is brought about. In this case, the magnetic filter 85 has a BOX structure in which, for example, a plurality of magnet members 87 as in the fourteenth embodiment shown in FIG. Is preferred.
[0084]
Further, as in the fifteenth embodiment shown in FIG. 15, the installation position of the filter 84 c in the third system is provided on the upstream side of the input shaft 30, specifically in the hole portion of the input shaft 30 near the tip of the drive shaft member 31. It doesn't matter if you do. Specifically, in the installation structure of the filter 84c, as shown in FIG. 15, a step is formed in the hole portion of the input shaft 30 near the tip of the drive shaft member 31, and a hole portion (passage) is formed in this step. A structure in which a filter 84c is provided so as to close the gap is employed. In addition, since the rolling bearing 33 does not rotate at high speed for installation at this point, even if a foreign object is caught, there is not much influence.
[0085]
Of course, in addition to the structure in which the surface filter and the magnetic filter are provided on the oil passage outlet side, a magnet member that forms a magnetic filter may be separately provided in the oil passage of the lubrication system.
[0086]
However, in the second to fifteenth embodiments described above, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0087]
In addition, although each embodiment gave the example which applied this invention to the half toroidal type continuously variable transmission, it cannot be overemphasized that this invention may be applied to a full toroidal type transmission. Absent. Of course, a single cavity type may be used instead of a double cavity type.
[0088]
【The invention's effect】
  As explained aboveBookAccording to the invention,NextBy the filter, the foreign matter existing in the section from the line filter to the ejection hole can be removed before being ejected to the traction surface.
[0089]
As a result, it is possible to prevent foreign matter during initial assembly from getting caught in the rolling contact point of the input / output disk and power roller, and the life of the input / output disk and power roller can be improved.
[0090]
  BookAccording to the invention, metal foreign matter that could not be removed by the line filter can be removed by the adsorption action of the magnet member.
[0091]
As a result, foreign matter can be prevented from biting into the rolling contact points of the input / output disk and the power roller, and the life of the input / output disk and the power roller can be improved.
[0092]
  BookAccording to the invention, the cover member can suppress the action of scooping up the dirty lubricating oil on the input / output disk.
[0093]
As a result, foreign matter contained in the contaminated lubricating oil can be prevented from being caught at the rolling contact point of the input / output disk and the power roller, and the life of the input / output disk and the power roller can be improved.
[0094]
  BookAccording to the invention, there is an effect that the function of protecting the traction surface of the input / output disk and the power roller can be sufficiently exhibited.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a main part of a toroidal type continuously variable transmission according to a first embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a sectional view taken along line BB in FIG.
FIG. 4 is a cross-sectional view showing a filter structure provided at an outflow portion of a first system (lubricating system) assembled above the cavity of the transmission.
FIG. 5 is a cross-sectional view showing a filter structure provided at an outflow portion of a second system (lubricating system) assembled to a trunnion of the transmission.
FIG. 6 is a cross-sectional view showing a filter structure provided on the outflow side of a third system (lubricating system) assembled inside the input shaft of the transmission.
FIG. 7 is a perspective view showing a structure of a cover member disposed on the lower side of the disk of the transmission.
FIG. 8A is a cross-sectional view showing a filter structure provided at an outflow portion of a first system (lubricating system), which is a main part of a second embodiment of the present invention.
(B) is sectional drawing which shows the filter structure provided in the outflow part of the 1st system | strain (lubricating system | strain) used as the principal part of the 3rd Embodiment of this invention.
(C) is sectional drawing which shows the filter structure provided in the outflow part of the 1st system (lubricating system) used as the principal part of the 4th Embodiment of this invention.
(D) is sectional drawing which shows the filter structure provided in the outflow part of the 1st system (lubricating system) used as the principal part of the 5th Embodiment of this invention.
(E) is sectional drawing which shows the filter structure provided in the outflow part of the 1st system (lubricating system) used as the principal part of the 6th Embodiment of this invention.
FIG. 9A is a cross-sectional view showing a filter structure provided at an outflow portion of a second system (lubricating system), which is a main part of a seventh embodiment of the present invention.
(B) is sectional drawing which shows the filter structure provided in the outflow part of the 2nd system (lubricating system) used as the principal part of the 8th Embodiment of this invention.
(C) is sectional drawing which shows the filter structure provided in the outflow part of the 2nd system (lubricating system) used as the principal part of the 9th Embodiment of this invention.
FIG. 10 is a cross-sectional view showing a filter structure provided on the outflow side of a third system (lubricating system), which is a main part of a tenth embodiment of the present invention.
FIG. 11 is a cross-sectional view showing a single-type surface filter provided at an outflow portion of a first system (lubricating system) as a main part of an eleventh embodiment of the present invention.
FIG. 12 is a cross-sectional view showing a single-type surface filter provided at an outflow portion of a second system (lubricating system) as a main part of a twelfth embodiment of the present invention.
FIG. 13 is a cross-sectional view showing a single-type surface filter provided on the outflow side of a third system (lubricating system) as a main part of a thirteenth embodiment of the present invention.
FIG. 14 is a cross-sectional view showing a single-type magnetic filter assembled to a part of an oil passage as a main part of a fourteenth embodiment of the present invention.
FIG. 15 is a cross-sectional view showing a filter structure provided on the outflow side of a third system (lubricating system), which is a main part of a fifteenth embodiment of the present invention.
[Explanation of symbols]
10... variator
12a, 12b ... Input disk
13a, 13b ... Output disk
15a-15d ... Power roller
18 ... Eccentric shaft
18c ... Shaft
30 ... Input shaft
31 ... Drive shaft member
70 ... Lubrication system
71a ... Line filter
73 ... Support post
74: Bolt member
74c ... hole
76 ... Ejection head
77 ... Blowout hole
80c ... passage (oil passage)
80d ... Injection hole
82b ... passage (jet hole)
84a-84c... fuYilta (2NextYilta)
85a-85c ... Magnet member (magnetic filter).

Claims (5)

The output disk is rotated by changing the contact point between the input disk, the output disk and the power roller by tilting the power roller with the input roller and the output disk arranged opposite to each other and tilting the power roller. A variator that changes the transmission gear ratio to the disk steplessly,
A lubrication system that constitutes an oil passage that allows the lubricating oil assembled with the variator to flow through the line filter to flow out to the traction surface of the input disk and the output disk and to the traction surface of the power roller;
And the lubricating system is
The lubricating oil is sprayed from the ejection hole to the traction surface of the input disk and the output disk and the traction surface of the power roller through a support post held in the center of the cavity constituted by the input disk and the output disk. The first system;
A second system that discharges the lubricating oil from an ejection hole that opens to the outer periphery of the shaft portion through an eccentric shaft having a shaft portion that rotatably supports the power roller;
The lubricating oil is discharged from a jet hole opened in a peripheral wall of the input shaft through an input shaft that penetrates through the rotation center of the input disk and the output disk and through a drive shaft member connected to the input shaft. Including
The secondary filter and the lubricating oil installed so as to block the oil passage in at least one upstream portion of the ejection holes of the first system, the ejection holes of the second system, and the ejection holes of the third system Installed at least one of the magnet members to be attached so as not to impair the flow of
Toroidal type continuously variable transmission, wherein a call. The ejection hole of the first system is formed on an outer peripheral surface of an ejection head fastened with a bolt member to a distal end portion of the support post, and is formed from a distal end portion of the bolt member to the vicinity of the head portion. Communication,
At least one of the secondary filter and the magnet member is inserted into the hole of the bolt member.
Toroidal type continuously variable transmission as claimed in claim 1, wherein the this. The ejection hole of the second system communicates with a passage formed in the shaft portion of the eccentric shaft,
At least one of the secondary filter and the magnet member is inserted into the passage of the shaft portion.
Toroidal type continuously variable transmission as claimed in claim 1, wherein the this. The ejection holes of the third system are provided at a plurality of locations along the axis of the input shaft,
At least one of the secondary filter and the magnet member is inserted into an oil passage near the connecting portion between the input shaft and the drive shaft member that is the most upstream side of the plurality of ejection holes.
Toroidal type continuously variable transmission as claimed in claim 1, wherein the this. The secondary filter has a coarser mesh than the line filter
Toroidal type continuously variable transmission as claimed in any one of claims 4 and this claim, wherein.

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