JPH0460251A - Lubricating device of continuously variable transmission - Google Patents

Abstract

PURPOSE:To efficiently lubricate a transmission with a small quantity of lubricating oil by varying the direction of a nozzle for supplying lubricating oil to a contacting portion between a pulley and a V-belt in such a manner as to always supply lubricating oil to a position where the V-belt is wrapped in the pulley according to a speed change ratio. CONSTITUTION:When a movable cone member 18 moves closer to a fixed cone member 12 (that is, the speed change ratio is increased), a speed change ratio detecting member 32 moves to the left to work on a cam face 34a, whereby a nozzle supporting member 34 is rotated counter-clockwise so that a nozzle 36 is put in the state of supplying lubricating oil to the outside diameter sides of the fixed cone member 12 and the movable cone member 18. On the contrary, when the speed change ratio is decreased, the movable cone member 18 moves to the right, whereby the nozzle supporting member 34 is rotated clockwise so that the nozzle 36 is put in the state of supplying lubricating oil to the inside diameter sides of the fixed cone member 12 and the movable cone member 18. Thus, lubricating oil can be supplied a portion where a V-belt is wrapped in a pulley.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a lubricating device for a continuously variable transmission.

(b) Conventional technology As a lubricating device for conventional continuously variable transmissions,
There is one shown in Publication No. 662.

The lubricating device for the continuously variable transmission shown in this figure is configured to (1) control the amount of oil for lubricating the belt in accordance with the rotational speed of one of the pulleys. As a result, a relatively small amount of oil is supplied during low-speed rotation, and a large amount of lubricating oil is supplied during high-speed rotation, making it possible to always supply the required amount of lubricating oil.

(c) Problems to be Solved by the Invention However, in the conventional lubricating device for continuously variable transmissions as described above, although the amount of oil varies depending on the rotation speed, the position at which the lubricating oil is supplied is always constant. Therefore, there is a problem that lubricating oil may not be properly supplied depending on the gear ratio.

In other words, if the lubricating oil supply nozzle is arranged to supply lubricating oil to the outer circumferential side of the pulley, V
If the bells l~ touch, there will not be sufficient lubrication.

The present invention aims to solve these problems.

(d) Means for Solving the Problems The present invention solves the above problems by changing the direction of the nozzle for supplying lubricating oil according to the gear ratio. That is, in the lubricating device for a continuously variable transmission according to the present invention, the direction of the nozzle (36) that supplies lubricating oil to the contact area between the pulleys (12, 18) and the belt (24) is such that the belt is wound around the pulley. It is variable according to the gear ratio so that lubricating oil is always supplied to the position where the lubricating oil is supplied.

The mechanism that makes the direction of the nozzle variable according to the speed ratio includes a speed ratio detection member (32) that moves together with the movable member of the pulley in the axial direction, and a linear movement of the speed ratio detection member that is controlled by the pulley of the nozzle. A cam mechanism (34a) that converts rotational movement in a plane perpendicular to the rotation axis.

(E) Effect For example, if the nozzle supplies lubricating oil to the driven pulley, when the gear ratio is large, the lubricating oil is supplied to the outer diameter side of the pulley, and conversely, when the gear ratio is small, the lubricating oil is supplied to the outer diameter side of the pulley. The inclination of the nozzle changes according to the gear ratio so that lubricating oil is supplied to the inner diameter side of the pulley. As a result, lubricating oil is constantly supplied to the part where the belt is wound around the pulley, and a small amount of lubricating oil can provide effective lubrication, significantly improving durability. .

(F) Embodiment Figures 1 and 2 show the driven-side pulley. A fixed conical member 12 is provided integrally with the pulley shaft 10. A fixed wall member 14 is fixed to the pulley shaft lO. Further, a movable conical member 18 is connected to the pulley shaft 10 via a ball spline 16. The movable conical member 18 is movable in the axial direction of the pulley shaft 10 by the action of the ball spline 16, but rotates integrally with the pulley shaft 10 in the rotational direction. Fixed wall member 14 and movable conical member 18
A sealed cylinder chamber 20 is formed.

Hydraulic pressure can be supplied to and discharged from the cylinder chamber 20 through an oil passage 22 provided on the pulley shaft 10. The V-belt 24 is inserted into a 7-shaped groove formed by the fixed conical member 12 and the movable conical member 18, and rotational force is transmitted by the frictional force between them. A circumferential groove 30 is provided on the outer periphery of the movable conical member 18.
The right-angled end portion of the gear ratio detection member 32 is fitted into the frame. The gear ratio detection member 32 is supported so as to be movable in the axial direction of the pulley shaft lO. Gear ratio detection member 32
The left end in FIG. 1 is the cam surface 34a of the nozzle support member 34.
is in contact with. The cam surface 34a is configured such that when the gear ratio detection member 32 moves in its axial direction, the nozzle support member 34 rotates around the axis of a hollow shaft 35 integral with the nozzle support member 34, as shown in FIG. It is configured. The nozzle support member 34 has a nozzle 3 that injects lubricating oil toward the pulley side.
6 is provided. Further, the nozzle support member 34 is provided with a chamber 37 that communicates with the nozzle 36.
7 is configured to be supplied with lubricating oil via a hollow shaft 35. Note that the nozzle support member 34 is always subjected to a force to return it to its initial position by a return spring (not shown).

Next, the operation of this embodiment will be explained. As described above, the V-belt 24 is inserted into the 7-shaped groove formed by the fixed conical member 12 and the movable conical member 18, and transmits rotational force by the frictional force between them. The movable conical member 18 moves in the axial direction depending on the balance between the force acting on the movable conical member 18 from the V-belt 24 and the force due to the hydraulic pressure in the cylinder chamber 20, and a speed change is performed. V-belt 2
4 comes into contact with the fixed conical member 12 and the movable conical member 18 on the outer circumferential side, the higher the gear ratio becomes, and conversely, the more they contact on the inner diameter side, the lower the gear ratio becomes. The gear ratio detection member 32 also moves in the axial direction in accordance with the axial movement of the movable conical member 18 accompanying this speed change. When the movable conical member 18 moves closer to the fixed conical member 12 (that is, when the gear ratio increases), the gear ratio detection member 32 moves to the left in FIG. 1, which acts on the cam surface 34a, The nozzle support member 34 rotates counterclockwise in FIG. As a result, the nozzle 36 is in a state of supplying lubricating oil to the outer diameter sides of the fixed conical member 12 and the movable conical member 18.

Therefore, lubricating oil is supplied to the position where the V-belt 24 is wound around the fixed conical member 12 and the movable conical member 18. Conversely, when the gear ratio becomes smaller, the movable conical member 1
8 moves to the right in FIG. Therefore, the nozzle support member 34 rotates clockwise in FIG.
is in a state where lubricating oil is supplied to the inner diameter sides of the fixed conical member 12 and the movable conical member 18. When the gear ratio is reduced, the V-belt 24 is wound around the inner diameter side of the fixed conical member 12 and the movable conical member 18, so lubricating oil is still supplied to the portion where the V-belt 24 is wound. It turns out. As a result, the radial position of the V-belt 24 at which it is wound around the fixed conical member 12 and the movable conical member 18 changes depending on the gear ratio, but the nozzle 36 rotates accordingly, and the V-belt 24 is always wound up. Supply lubricating oil to the position where the Therefore, lubricating oil is supplied without waste, and even with a relatively small amount of lubricating oil, lubrication can be performed efficiently. Further, since sufficient lubrication is provided, the durability of the V-belt 24 and the like is improved.

(g) As described in detail, according to the present invention, the direction of the nozzle for supplying lubricating oil is changed according to the gear ratio, so lubricating oil is always supplied to the winding position of the V-belt. can be efficiently (lubricated) with a small amount of lubricating oil, V
Improves the durability of belts, pulleys, etc. Furthermore, since the amount of lubricating oil is reduced, the load on the oil pump is reduced.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an embodiment of the present invention, and the second section is I in Figure 1.
It is a sectional view along the I-II line. lO...Pulley shaft, 12...Fixed conical member, 18
...-Movable conical member, 24...V belt, 32...
- Gear ratio detection member, 34... nozzle support member, 34a
...Cam surface, 36...nozzle. Figure 1

Claims (1)

[Claims] 1. In a lubricating device for a continuously variable transmission having two sets of pulleys with variable effective diameters and a V-belt wrapped around these, lubricating oil is applied to the contact area between the pulleys and the V-belt. A lubricating device for a continuously variable transmission, characterized in that the direction of a supply nozzle is variable according to a gear ratio so that lubricating oil is always supplied to a position where a V-belt is wound around a pulley. 2. The mechanism that changes the direction of the nozzle according to the gear ratio is
A gear ratio detection member that moves together with the movable side member of the pulley in the axial direction, and a cam mechanism that converts the linear motion of the gear ratio detection member into rotational motion in a plane orthogonal to the pulley rotation axis of the nozzle. A lubricating device for a continuously variable transmission according to claim 1.