JPH081092U - Friction continuously variable transmission - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a friction type continuously variable transmission that does not cause leakage or loss of lubricating oil in a case. A friction continuously variable transmission in which the rotation of an input shaft 11 is transmitted to an output shaft 12 through a double cone and the rotation of the output shaft is changed by the movement of the double cone. The connected extraction pipe 32 is connected to the inlet of the liquefier 33, and the outlet of the liquefier 33 is connected to the case 3
1 is connected by a return pipe 34 to the inside of the case 31, and the lubricating oil vaporized or atomized in the case 31 is liquefied by the liquefier 33 and returned to the case 31 to prevent leakage and loss of the lubricating oil.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a friction type continuously variable transmission using a double cone, and more specifically, a friction type continuously variable transmission that prevents leakage and loss of lubricating oil in the case and makes it unnecessary to supply lubricating oil for a long time. Regarding a speed change gear.

[0002]

[Prior art]

 FIG. 3 shows a continuously variable transmission using a double cone (composite conical rotor). A plurality of double cones 3 are provided around the input shaft 1 and the output shaft 2 which are coaxially arranged. The drive cone 4 mounted on the input shaft 1 is brought into contact with one conical surface 3a of the double cone 3 with an appropriate pressure, and the outer ring 5 provided on the output shaft 2 is contacted with the other conical surface 3b of the double cone 3. By making contact with each other, the rotation of the input shaft 1 is transmitted from the drive cone 4 to the outer ring 5 of the output shaft 2 via the double cone 3.

A cone spindle 6 that rotatably supports the double cone 3 is held by a pair of supports 7 and 8 arranged so as to be movable in the axial direction of the input shaft 1 and the output shaft 2. Then, by moving the double cone 3 together with the cone spindle 6 in the axial direction of the input shaft 1 by the moving means 9 which is interlocked with the one support 7, the rotation of the output shaft 2 is changed.

The upper half of FIG. 3 shows the phase of the double cone 3 when the rotational speed of the output shaft 2 is reduced, and the lower half of the same figure shows the phase of the double cone 3 when the rotational speed of the output shaft 2 is increased.

In the continuously variable transmission as described above, in order to rotatably support the sliding contact portion of each component and the double cone 3, the needle roller 10 installed between the cone spindle 6 and the cone roller 6 is supported. It is necessary to supply lubricating oil.

[0006] Conventionally, the lubricating oil supply means has been carried out by storing the lubricating oil in the case of the transmission and by splashing the oil by rotating the outer ring 5 etc. immersed in the lubricating oil.

[0007]

[Problems to be solved by the device]

 By the way, when the friction type continuously variable transmission is operated at high speed or high horsepower, the loss generated at each friction surface becomes heat and the temperature of the lubricating oil becomes high. According to the experimental example, when the input shaft or the output shaft reaches 60000 rpm, the temperature of the lubricating oil exceeds 100 ° C.

In such a case, the lubricating oil may be vaporized or atomized, and the inside of the case may have a high pressure and may be blown out through the gap. If such a state continues, a large amount of lubricating oil may be delivered within a short time. Is lost, and there is the problem that lubricating oil must be replenished frequently.

Therefore, an object of this invention is to prevent the leakage and loss of the lubricating oil by liquefying the lubricating oil vaporized or atomized in the case and returning it to the inside of the case, and to replenish the lubricating oil for a long time. It is to provide a friction type continuously variable transmission that becomes unnecessary.

[0010]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention transmits the rotation of the input shaft to the output shaft via a double cone, and moves the double cone to change the rotation of the output shaft. In a continuously variable transmission, a pipe for extracting vaporized or atomized lubricating oil is connected to the upper part of the case of a friction type continuously variable transmission, and this pipe is connected to the inlet of the liquefier and the outlet of the liquefier is connected to the case. This is a structure in which a return pipe is connected to the lower part.

[0011]

[Action]

 Lubricating oil in the case that has been vaporized or atomized by the operation of the friction type continuously variable transmission is guided to the liquefier by the extraction pipe connected to the upper part of the case and quickly liquefied, and the liquefied lubricating oil in the return pipe is used as the case. By returning it to the inside, it is possible to prevent leakage and loss of lubricating oil.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings.

FIG. 1 shows the entire structure of a friction type continuously variable transmission according to the present invention, and FIG. 2 shows the internal structure of the transmission.

First, in the internal structure of FIG. 2, the input shaft 11 and the output shaft 12 are coaxially arranged, a plurality of double cones 13 are provided around the input shaft 11, and the double cones 13 are provided at the tip of the input shaft 11. The drive cone 14 is brought into contact with one conical surface 13a of the double cone 13, the outer ring 15 provided on the output shaft 12 is brought into contact with the other conical surface 13b of the double cone 13, and the rotation of the input shaft 11 is doubled by the drive cone 14. It is adapted to be transmitted to the cone 13 and transmitted to the output shaft 12 by the double cone 13 and the outer ring 15.

The double cone 13 is rotatably supported by a support shaft 17 provided on the carrier 16 via a bearing 18, and is adapted to rotate without revolving.

The carrier 16 is movable along the axial direction of the input shaft 11, and the rotation of the output shaft 12 can be freely changed by moving the carrier 16 by a moving means (not shown).

The bearing 18 is formed by two rows of rollers 19 and a thrust ring 20 arranged between the ends of each roller 19 and both rollers 19.

A main lubricating passage 21 is provided to forcibly supply the lubricating oil to the bearing 18 from the carrier 16 to the support shaft 17, and the support shaft 17 has both ends of the rolling surface of each roller 19. A nozzle hole 22 for ejecting the lubricating oil sent to the main lubricating passage 21 is provided in the vicinity of the edge of the portion, and the lubricating oil positively lubricates the sliding surface on the side of the roller 19. This lubricating oil also enters the rolling surface of the roller 19 and secondarily lubricates the rolling surface.

Openings 23, 24 for discharging excess lubricating oil are formed at both ends of the double cone 13, and the excess drained oil that lubricates the bearing 18 flows out through the openings 23, 24 to the outside. It is also used to lubricate the frictional contact surfaces of the input / output shafts 11 and 12 and the double cone 13. Therefore, it is not necessary to supply special oil to these frictional contact surfaces.

As described above, by forcibly lubricating the bearing 18 that supports the double cone 13, a lubricating oil film is secured, and the double cone 13 can rotate at high speed due to the cooling effect.

Although FIG. 2 shows an example of use as a speed reducer, if the input shaft 11 is the output shaft and the output shaft 12 is the input shaft, it can be used as a speed increaser, and the bearing 18 is When the rotation speed of the double cone 13 is small, the thrust ring 20 can be omitted.

Next, in the entire structure of the friction type continuously variable transmission shown in FIG. 1, a pipe 32 for taking out vaporized or atomized lubricating oil is connected to an upper part of a case 31 for housing the above-mentioned internal structure, The pipe 32 is connected to the inlet of the liquefier 33 arranged outside the case 31, and the outlet of the liquefier 33 is connected to the lower part of the case 31 by the return pipe 34.

Although various types of liquefiers 33 can be applied depending on their performance, for example, a cooling tank, a cyclone, a porous object, a tank containing a wire mesh, an oil mist separator, etc. can be exemplified, and a pressure drop can be achieved with a large capacity. A cooling tank is good for making it small.

For miniaturization, a porous object, a wire mesh tank, and an oil mist separator are preferable, but they are inferior in capacity to a cooling tank, and a cyclone is useful when the flow velocity is high, but the device becomes large. To do.

That is, although various types of liquefiers 33 are conceivable, the most suitable one may be selected in view of the liquefaction capacity, the size of the device, and the like.

As described above, when the lubricating oil vaporized or atomized in the case 31 is guided to the liquefier 33 and quickly liquefied and returned to the case 31, the internal pressure of the friction type transmission increases. It has the advantages of preventing leakage and loss of lubricating oil, eliminating the need to reduce the rated speed or rated horsepower, and the need to replenish the lubricating oil for a long period of time.

[0027]

[Effect of device]

 As described above, according to this invention, in the friction type continuously variable transmission using the double cone, the lubricating oil vaporized or atomized in the case is liquefied and returned to the inside of the case. It prevents the leakage and loss of lubricating oil, eliminates the need to reduce the rated speed or rated horsepower of the transmission, and eliminates the need to supply lubricating oil for a long period of time.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the entire structure of a friction type continuously variable transmission according to the present invention.

FIG. 2 is a longitudinal sectional view showing the internal mechanism of the same.

FIG. 3 is a sectional view of a friction type continuously variable transmission shown as a conventional example.

[Explanation of Codes] 11 Input Shaft 12 Output Shaft 13 Double Cone 14 Drive Cone 15 Outer Ring 16 Carrier 17 Support Shaft 18 Bearing 21 Main Lubrication Channel 22 Nozzle Holes 23, 24 Opening 31 Case 32 Extraction Pipe 33 Liquefaction 34 Return Piping

Claims (1)

[Scope of utility model registration request] 1. A friction type continuously variable transmission in which rotation of an input shaft is transmitted to an output shaft via a double cone and the rotation of the output shaft is changed by moving the double cone. Connect a pipe for extracting vaporized or atomized lubricating oil to the upper part of the transmission case, connect this pipe to the inlet of the liquefier, and connect the outlet of the liquefier to the lower part of the case with a pipe. Characteristic friction type continuously variable transmission.