JPS6127359A - Toroidal stepless speed changer for car - Google Patents

Abstract

PURPOSE:To feed lubricant smoothly to the sliding section by arranging the shaft of trunnion approximately in vertical. CONSTITUTION:Lubricant to the dispersed through rotation of input and output discs 33, 34 is stored in an oil pan 50 then fed through oil paths 51, 52 to the bearing 39 and the thrust bearing 43 of power roller 35 thus to lubricate the sliding section. Consequently, the sliding section of power roller where the lubricant is convertionally hard to enter can be lubricated smoothly to eliminate forced lubrication through an oil pump.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a toroidal continuously variable transmission for a vehicle that smoothly lubricates a power roller that changes the rotation ratio.

(Prior Art) As a conventional toroidal continuously variable transmission, for example, as disclosed in Japanese Patent Laid-Open No. 58-160664, an output disk that drives an output shaft faces an input disk that is driven by an input shaft. A power roller is arranged between the rotating curved surfaces of the input disk and the output disk, and this power roller is rotatably supported by a trunnion via a roller shaft, and the engagement of the power roller is caused by driving this trunnion. A device has been proposed in which the rotation ratio between the input shaft and the output shaft is changed by changing the alignment position.

This power roller is rotatably supported by a roller shaft, bearings, etc. on a trunnion, and is constantly lubricated with lubricating oil because it operates under a predetermined load when transmitting power from the input shaft to the output shaft. There is a need to. by the way,
The sliding parts of the power roller are lubricated by agitating the lubricating oil in the housing by the rotation of input and output disks, or by forcibly supplying the lubricating oil to the sliding parts with an oil pump.

(Problem to be solved by the invention) However, in the method of lubricating by stirring the rotating body, the lubricating part such as the thrust bearing of the power roller is located between the power roller and the trunnion, so the sliding part is difficult to supply.

Furthermore, forcibly supplying oil to the lubricating parts with an oil pump requires a separate oil pump or the like, which is expensive.

The present invention has been made in view of the above, and an object of the present invention is to provide a toroidal continuously variable transmission for a vehicle that has a simple structure and is capable of supplying lubricating oil to sliding parts such as bearings of power rollers more smoothly. It is an object.

(Means for Solving the Problems) In order to solve the above-mentioned object, the present invention includes an output disk that drives an output shaft, which is disposed opposite to an input disk that is driven by an input shaft. For vehicles, the power roller placed between the rotating curved surfaces of the output disk is rotatably supported by a trunnion, and the trunnion is driven to change the engagement position of the power roller to change the rotation ratio between the input shaft and the output shaft. In the toroidal continuously variable transmission, the trunnion is arranged so that its axis is substantially vertical, an oil pan is provided on the trunnion, and lubricating oil in the oil pan is supplied to the sliding portion of the power roller. (Function) In this invention, a trunnion that pivotally supports the power roller is provided in a substantially vertical direction, and an oil pan provided on this trunnion is stirred by the operation of the transmission mechanism. The lubricating oil that is scattered by the engine will accumulate. First, the lubricating oil stored in the oil pan is
Oil is automatically supplied to sliding parts such as power roller bearings from oil passages formed in trunnions, etc., further improving lubrication.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

Figure 1 is a side view of a motorcycle to which this invention is applied;
The figure is a side view showing a toroidal continuously variable transmission installed in an internal combustion engine, Figure 3 is a sectional view taken along the line ■-m in Figure 2, and Figure 4 is an enlarged sectional view of the toroidal continuously variable transmission. Figure 5 is the fourth
6 is a plan view of FIG. 5. FIG.

This embodiment is applied to a starter type motorcycle, and in the figure, reference numeral 1 denotes a body frame, and an internal combustion engine 2 is suspended on this body frame 1.

An engine case 3 is connected to the internal combustion engine 2, and a crankshaft 5 driven by a piston 4 and a center shaft 7 for suspending a rear wheel 6 are rotatably supported on the engine case 3. . A power generator 41 is installed at one end of the crankshaft 5.
8 is provided, and a one-way clutch 9 is provided at the other end. This one-way clutch 9 is connected to a starter motor 10 via a connecting shaft 11, and the crankshaft 5 is driven by the starter motor 10 at the time of starting.

The tip of the crankshaft 5 has a toroidal continuously variable speed JJI
A is placed. The power of the internal combustion engine 2 is shifted by this toroidal continuously variable transmission aA, and is transmitted to the axle 7 of the drive mechanism C via the automatic clutch mechanism B.

The toroidal continuously variable transmission A has an input shaft 13 connected to the crankshaft 5 and an output shaft 1 in its housing 12.
An output gear 15 is key-engaged with the output shaft 14 on which the output shaft 14 is rotatably supported, and is connected via a timing belt 16 to an automatic crank, a crank of Chiiso structure B, and a gear gear 17. There is.

The housing 12 is divided into three planes perpendicular to the axial direction. The outer divided body 12a, the central divided body 12b and the inner divided body 12c have bearing portions 18, 19.2, respectively.
It has 0a and 20b. An oil pan 18a is formed in the outer divided body 12a so as to be connected to the bearing portion 18, and supplies lubricating oil to the bearing portion 18.

1-The outer divided body 12a is connected to the central divided body 12b, this central divided body 12b is connected to the inner divided body 12c, and the inner divided body 12c is connected to the crankcase 2 that constitutes the engine case 3.
1 with tightening ports 22, 23, and 24, respectively.

The human power shaft 13 is located at this outer portion, a bearing portion 18 of the split body 12a.
and the bearing portion 20a of the inner divided body 12c, and the output shaft 14 is connected to the bearing portion 19 of the central divided body 12b and
Bearings 25, 26, 2 are attached to the bearing portion 20b of c.
7 and 28. The input shaft 13 is fitted into and coaxially connected to the tip 5a of the crankshaft 5, and is coaxially connected at the bearing portion 20a of the connecting portion C±the inner divided body 12C. Furthermore, it is joined to an inner case 29 that covers the tip end 1 of the bearing part 20a and the one-way clutch 9.

A cam plate 30 is rotatably disposed on the input shaft 13, and power is transmitted to the input disk 33 via rollers 32 supported by a retainer 31. input disk 3
3 is loosely coupled to the input shaft 13.

An output disk 34 is arranged opposite to this input disk 33. Input disk 33 and IB power disk 34
Rotating curved surfaces 33a and 34a are formed to face each other, and a pair of power rows 35 are disposed between the rotating curved surfaces 33a and 34a. Power from the input disk 33 is transmitted to the output disk 34 via the power roller 35, and further to an output gear 36 press-fitted into the shaft of the output disk 34 and an input gear 37 of the output shaft 14. ing.

The power roller 35 has a toroidal convex surface that engages with the rotating curved surfaces 33a and 34a, and is rotatably mounted on a roller shaft 38 via a bearing 39, respectively. The roller shafts 38 are each rotatably supported by a trunnion 40 via a bearing 41. A thrust ball bearing 43 is disposed between the power roller 35 and the retainer 42. The trunnion 40 has support members 44, 45 disposed above and below.
It is held via bearings 46 and 47, and is slightly movable in the downward direction L. The upper support member 44 and the lower support member 45 are supported by the central dividing body 12b via an upper post 48 and a lower post 49, respectively.

The trunnion 40 is arranged in a substantially vertical direction, and in this range near the power roller 35, the trunnion 40
The lubricating oil stirred by the input and output disks 33 and 34 can be stored in the oil pan 50 provided in the input and output disks 33 and 34. If the oil pan 50 is long, the inclination of the trunnion 40 is made small, and if the oil pan 50 is short, the inclination is made large so that it approaches the vertical direction.

Oil passages 51 are formed in each of the left and right trunnions 40, and the lubricating oil in the oil pan 50 is passed from the oil passages 51 to the thrust ball bearings 43 of the power roller 35 through an oil passage 52 formed in the retainer 42. and bearing 39
supply to.

An actuation mechanism is disposed above the trunnion 40. A nut member 53 of this actuating mechanism is screwed into a bolt member 54 having a trapezoidal thread. The bolt member 54 is press-fitted into a connecting member 55 screwed onto the trunnion 40.

The nut member 53 is connected to the center dividing body 1 via a bearing 56.
2b, and the rotation of this nut member 53 causes the trunnion 40 to move a small amount in the pivot axis direction X. As a result, the power roller 35 is displaced in the pivot axis direction
5. Therefore, the trunnion 40 rotates around the pivot axis. Since the rotation direction follows the nut member 40, the deviation of the trunnion 40 returns to its original state as the trapezoidal thread of the bolt member 54 leads. When the power roller 35 returns to the neutral position, that is, when the rotation of the power roller 35 returns to the state where the axis Y and the input axis intersect, the power roller 3
5 stops, and the desired rotation ratio can be obtained.

As shown in FIG. 6, the nut member 53 is connected to a rotating shaft 57.
It is connected by a link 59 to a guide 58 that spirals on the top,
A wheel gear 60 provided at the end of this rotating shaft 57 meshes with a worm gear 62 of a servo motor 61.
It is rotated by a servo motor 61.

The automatic clutch mechanism B has a clutch shaft 63 rotatably supported by the engine case 3.
The flange gear 17 is loosely engaged with the flange gear 17. A clutch outer 64 is rotatably provided on the flange gear 17, and a clutch center 6 is provided inside the clutch outer 64.
5 is arranged so as to be able to rotate integrally with the clutch shaft 63.

The clutches are connected by sliding clutch plates 66 and 67 which are engaged with each other so as to be movable in the axial direction. The flange plates 66 and 67 are connected to the clutch outer 6
The centrifugal rollers 68 disposed on the four parts of the clutch outer 6
This is done by moving the clutch plates 66 and 67 outward in response to the centrifugal force that accompanies the rotation of the clutch plates 66 and 67 in the axial direction.

In FIG. 3, the right half of the automatic clutch mechanism B shows a clutch engaged state in which the centrifugal roller 68 has moved outward, and the left half shows a clutch disengaged state in which the centrifugal roller 68 is located inward.

The drive mechanism C has an axle 7, which is a drive shaft, rotatably supported by the engine case 3, and an input gear 69 of the axle 7 meshes with an output gear 7o of the clutch shaft 63. It is designed to drive.

The operation of this embodiment will be explained below.

The driving force of the internal combustion engine 2 is input directly from the crankshaft 5 to the input shaft 13 of the toroidal continuously variable transmission A, and is transmitted from the cam plate 31, rollers 32, input disk 33 to the output disk 34 via the power roller 35. Ru. Further, the signal is transmitted from the output disc 34 to the output gear 36 and the output shaft 14, and from the output gear 15 to the automatic clutch B via the timing belt 16.

At this time, based on information such as the rotational speed of the crankshaft 5, the vehicle speed, and the throttle opening, the optimal rotational ratio is calculated and determined to be on the open side, and the servo motor 61 is rotated by a predetermined angle.

Along with this rotation, the guide 58 spirals on the rotating shaft 57, the nut member 53 rotates via the link 59, and the trunnion 40 moves in either the up or down direction. As a result, one roller shaft 38 of the power roller 35 is deviated from the input shaft 13 of the input disk 33, and the above-mentioned automatic speed change effect occurs.

Therefore, the power roller 35 and the input/output disk 33.34
The radius of the engagement circle with the rotating curved surfaces 33a and 34a changes, that is, the rotation ratio changes, and the trunnion 40 is rotated by a predetermined angle, moves up and down, returns to its original position, and performs gear change control. It will be done.

At this time, the lubricating oil within the housing 12 is stirred by the rotation of the input/output disks 33, 34, etc.

The lubricating oil that scatters along with this is stored in an oil pan 50 provided in the trunnion 40, and is further stored in oil passages 51, 52.
The oil is supplied from the bearing 39'8 of the power roller 35 and the thrust ball bearing 43 to lubricate these sliding parts.

(Effects of the Invention) As described above, the present invention includes a trunnion that supports the power roller of a toroidal continuously variable transmission and changes the rotation ratio and is arranged in a substantially vertical direction, and an oil pan is provided on this trunnion. Since we have formed an oil path that guides the lubricating oil in the oil pan to the sliding part of the power roller, the lubricating oil that is scattered by the rotation of the transmission mechanism is stored in the oil pan, and is automatically transferred from the oil path to the sliding part of the power roller. Supplied to lubricate.

Therefore, the sliding parts of the power roller can be smoothly lubricated, and are not easily exposed to scattered lubricating oil, and sufficient lubrication can be achieved without employing a forced lubrication method such as an oil pump.

[Brief explanation of the drawing]

Figure 1 is a side view of a motorcycle to which this invention is applied;
The figure is a side view showing a state in which a toroidal continuously variable transmission is attached to an internal combustion engine, Figure 3 is a sectional view taken along the line ■-■ in Figure 2, and Figure 4 is an enlarged sectional view of the toroidal continuously variable transmission. Figure 5 is the fourth
A sectional view taken along the line V-■ in the figure, and FIG. 6 is a plan view of FIG. 5. A...Toroidal continuously variable transmission B...Automatic clutch mechanism

Claims (1)

[Claims] An output disk that drives the output shaft is arranged opposite to an input disk that is driven by the input shaft, and a power roller placed between the rotating curved surfaces of the input disk and the output disk is rotatably supported on a trunnion. In a toroidal continuously variable transmission for a vehicle that changes the engagement position of the power roller by driving the trunnion to change the rotation ratio between the input shaft and the output shaft, the trunnion is arranged so that its axis is in a substantially vertical direction. A toroidal continuously variable transmission for a vehicle, wherein the trunnion is provided with an oil pan, and an oil path is formed to guide lubricating oil in the oil pan to the sliding portion of the power roller.