JPH0210298B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a plurality of coaxially arranged and coupled The present invention relates to a stage planetary roller type friction transmission, and particularly to a lubrication device thereof.

Such a multi-stage roller friction transmission device is
(1) Compact and suitable for high-speed transmissions, (2) Low noise.
(3) It has many advantages such as high-precision gears for high speeds can be omitted, resulting in low cost, and (4) little torque fluctuation and rotation fluctuation, but on the other hand, the rotation of the highest speed shaft is
The speed reaches more than 50,000 rpm, and the sun roller connected to the highest speed shaft lacks lubrication, causing problems such as seizure.

An object of the present invention is to provide a multi-stage planetary roller type friction transmission device that can supply lubricating oil to the sun roller of the highest speed shaft without shortage.

In order to achieve this object, the multi-stage planetary roller type friction transmission device of the present invention is provided on the highest speed shaft in the multi-stage planetary roller type friction transmission device which is coaxially arranged and connected to each other. A central hole with a predetermined depth in the axial direction provided on the end surface of the intermediate shaft of the sun roller, a radial hole extending from this center hole to the outer periphery of the sun roller, and a lubricating oil spout provided on the intermediate shaft end of the lowest speed shaft. , a through hole provided in the intermediate shaft that extends along the center line, and a lubricating oil pressure that causes the lubricating oil to pass through the through hole in the intermediate shaft and reach the center hole of the highest speed shaft to be jetted out from the lubricant oil spout of the slowest shaft. Equipped with means of transportation.

Embodiments of the present invention will be described with reference to the drawings.

The low-speed planetary roller friction transmission device 1a and the high-speed planetary roller friction transmission device 1b are arranged coaxially with each other, and each has outer rings 3a and 3b fixed to a housing 2, and a plurality of elastically deformable outer rings 3a and 3b. It includes hollow planetary rollers 4a, 4b, sun rollers 5a, 5b, and retainers 6a, 6b inserted into the planetary rollers 4a, 4b. The low-speed shaft 7 is rotatably supported by the housing 2 via ball bearings 8 and 9, and is connected to the housing 2 at one end.
The pulley 10 is fixed to the pulley 10 by protruding therefrom, and the other end is connected to the retainer 6a. The rotation of an electric motor (not shown) is transmitted to the pulley 10 via a belt. The intermediate shaft 13 is rotatably supported by the housing 2 via a ball bearing 14, is provided with a sun roller 6a at one end, and is coupled to a retainer 6b at the other end. The high-speed shaft 15 has ball bearings 16 and 17.
It is rotatably supported by the housing 2 via a sun roller 5b at one end, and connected to an impeller (not shown) of a turbo compressor at the other end. The low speed shaft 7, intermediate shaft 13, and high speed shaft 15 are coaxially aligned with each other. Low speed axis 7
A jet nozzle 20 is provided at the center of the end on the intermediate shaft 13 side, and the jet nozzle 20 is connected to a passage 22 of the housing 2 via a passage 21 formed in the low-speed shaft 7 . The seal rings 23 and 24 are provided between the inner circumferential surface of the housing 2 and the outer circumferential surface of the low-speed shaft 7 to prevent leakage of lubricating oil from the connection point between the passages 21 and 22. The passage 22 is an oil pump 25
connected to the discharge port of the A through hole 28 is formed in the intermediate shaft 13 along the center line.
The inner diameter of the nozzle 8 is defined as several times the inner diameter of the jet nozzle 20 . A center hole 29 with a predetermined depth is formed in the center of the end of the sun roller 56 on the intermediate shaft 13 side in the axial direction,
A radius hole 3 is formed from the center hole 29 to the outer periphery of the sun roller 5b.
0 is extended. The inner diameter of the center hole 29 is the same as that of the through hole 28.
approximately equal to the inner diameter of Further, a lubricating oil spout 32 is provided in a portion 31 of the housing 2 extending to the vicinity of the sun roller 5b toward the sun roller 5b. Two planetary roller friction transmissions 1
a and 1b, the rotation of the low-speed shaft 7 is increased to about 10,000 rpm and transmitted to the high-speed shaft 15, but this multi-stage planetary roller friction transmission device uses the high-speed shaft 15 as the input shaft. For example, it can also be used as a speed reduction device.

The lubricating oil pumped from the oil pump 25 reaches the spout 20 via the passages 22 and 21. Since the pumping pressure of the oil pump 25 is set higher than the hydraulic pressure generated by the centrifugal force of the low-speed shaft 7,
It will not become impossible to pump lubricating oil down to zero. The lubricating oil is ejected from the ejection port 20 and flows into the jet stream 34.
The particles pass through the through hole 28, hit the bottom surface of the center hole 29, and accumulate in the center hole 29. The lubricating oil that has entered the center hole 29 reaches the outer periphery of the sun roller 5b via the radial hole 30 due to the centrifugal force of the high speed shaft 15, and lubricates the outer periphery of the sun roller 5b. High speed axis 1
5 is generated in the direction of the intermediate shaft 13, this thrust force is received by the central portion of the retainer 6b, that is, the end of the intermediate shaft 13 on the high speed shaft 15 side. The lubricating oil that flows out lubricates this thrust section. Also,
The lubricating oil from the spout 32 is jetted directly onto the outer periphery of the sun roller 5b.

FIG. 2 shows the main parts of another embodiment of the invention. In this embodiment, the center hole 36, which corresponds to the center hole 29 in FIG. , 38 are formed. Ball bearing 1 by radial holes 37, 38
6 and 17 can also be lubricated. Note that the radius hole 37,
38 is made thinner than the radius hole 30, and the sun roller 5b
to ensure that there is no problem with lubrication.

As described above, according to the present invention, lubricating oil is ejected from the lubricating oil spouting port of the slowest speed shaft so as to pass through the through hole of the intermediate shaft and reach the center hole of the sun roller of the highest speed shaft, and from this center hole, Lubricating oil is guided to the outer periphery of the sun roller through the hole, and the sun roller of the highest speed planetary roller friction transmission device can be appropriately lubricated. In addition, the lubricating oil that flows out from the center hole of the sun roller lubricates the end of the intermediate shaft, which serves as a surface that receives the thrust force of the high-speed shaft, making it possible to increase the transmission torque capacity. By making it a part that receives thrust force, the number of bearings supporting the high-speed shaft can be reduced, the axial dimension of the high-speed shaft can be reduced, the weight of the high-speed shaft can be reduced, and acceleration performance can be improved by reducing the polar moment of inertia. can be achieved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of main parts of another embodiment of the present invention. 1a, 1b... Planetary roller type friction transmission device, 5
b... Sun roller, 7... Low speed shaft, 13... Intermediate shaft, 15... High speed shaft, 20... Jet nozzle, 25...
Oil pump, 29, 36... Center port, 30...
Radius hole, 34...jet.

Claims (1)

[Claims] 1. In a multi-stage planetary roller friction transmission device that is coaxially arranged and connected to each other, the center of a predetermined depth in the axial direction is provided on the end surface of the intermediate shaft of the sun roller provided on the highest speed shaft. hole,
A radial hole extending from this center hole to the outer circumference of the sun roller, a lubricating oil spout provided at the end of the intermediate shaft of the lowest speed shaft, a through hole provided in the intermediate shaft and extending along the center line, and a through hole in the intermediate shaft. A multi-stage planetary roller type friction transmission device, characterized in that it is equipped with a lubricating oil pressure sending means for jetting out lubricating oil from a lubricating oil spout of the slowest speed shaft so that the lubricating oil passes through the lubricating oil and reaches the center hole of the highest speed shaft.