JPH0621635B2 - V-belt type continuously variable transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a V-belt type continuously variable transmission,
More specifically, the present invention relates to a V-belt type continuously variable transmission that uses a V-belt composed of a metal block and a connecting member of the metal block and has a lubricating structure for the V-belt.

[Prior Art] Conventionally, as a V-belt used in a V-belt type continuously variable transmission, endless laminated bands are fitted into the left and right slits of a metal block having a trapezoidal cross section to connect a large number of these metal blocks. There are a plurality of metal blocks having a trapezoidal cross section and connected to each other in a chain shape. Since such a V-belt generates a large amount of heat at the connecting portion of the metal block during operation, conventionally, the lubricating oil is jetted from the supply port provided on the rotary shaft of the variable-width pulley to which the V-belt is assembled to eject the V-belt. I try to cool the belt.

[Problems to be Solved by the Invention] In the above conventional method of lubricating the V-belt by injecting the lubricating oil from the lubricating-oil supply port provided on the rotary shaft of the variable-width pulley to which the V-belt is assembled, the following method is used. There was a problem.

(1) Since the lubricating oil is supplied from the inside of the V-belt in the radial direction, the lubricating oil is blocked by the metal block and hardly penetrates into the connecting member on the inner side of the V-belt, and between the metal block and the connecting member. Also, lubrication between the connecting members was insufficient. In particular, since the V-belt is curved in the pulley portion and the blocks are closely adhered to each other inside, the tendency is remarkable in the pulley portion.

(2) Since both pulleys slide in the axial direction as the gear shifts, lubrication from the inside of the V-belt does not allow uniform lubrication over all gear shift states. Therefore, it is conceivable to supply the lubricating oil from the sliding direction of both pulleys toward the V-belt, but in the V-belt type continuously variable transmission, the V-belt moves in a direction perpendicular to the axial direction of the variable-width pulley along with the flow velocity. Since the vehicle moves, even in this case, sufficient lubricating oil cannot be constantly supplied to the V-belt in all speed change states.

The present invention has been made in view of the above-mentioned conventional problems, and is for efficiently suppressing heat generation in a metal block that constitutes a V-belt or a connecting portion of the metal blocks in all shift states. An object of the present invention is to provide a V-belt type continuously variable transmission having a lubrication method.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a V-belt stretched between an input pulley and an output pulley whose widths are relatively changed according to a gear ratio. In a V-belt type continuously variable transmission composed of a metal block and a connecting member of the metal block, the V-belt type continuously variable transmission is viewed from the sliding direction of both pulleys regardless of the change of the gear ratio of the V-belt type continuously variable transmission. The V-belt from the sliding direction of the pulleys to a predetermined portion between the pulleys where the V-belt always passes.
It is characterized in that a supply port for injecting lubricating oil toward the belt is provided.

[Operation and Effect of the Invention] According to the present invention, a V-belt stretched between an input pulley and an output pulley whose widths change relative to each other according to a gear ratio is made of a metal block and the metal block. In a V-belt type continuously variable transmission including a connecting member, a V-belt continuously variable transmission is provided with a supply port for injecting lubricating oil from the sliding direction of the pulleys toward the V-belt.
Compared to the conventional method of supplying lubricating oil from the inside in the radial direction of the belt, the lubricating oil is not blocked by the metal block, and V
Since it fully penetrates into the connecting member on the inner side of the belt, it is possible to sufficiently lubricate between the metal block and the connecting member and between the connecting members, and the V-belt slides in the axial direction as the gear shifts. However, since it can be uniformly lubricated in all shift states, it has an effect that heat generation in the metal block or the connecting portion of the metal blocks can be efficiently suppressed in all shift states. .

A V-belt, which is stretched between an input pulley and an output pulley, the widths of which are relatively changed in accordance with a gear ratio, is composed of a metal block and a connecting member of the metal block. In the continuously variable transmission, the V
A supply port for injecting lubricating oil is provided at a predetermined portion of both pulleys through which the V-belt always passes when viewed from the sliding direction of the pulleys regardless of the change in the gear ratio of the belt type continuously variable transmission. As a result, even if the V-belt moves in a direction perpendicular to the axial direction of the variable-width pulley due to gear shifting, sufficient lubricating oil is always supplied for all gear shifting states, and the metal block and the metal block are connected. This has an effect that heat generation in a part can be efficiently suppressed in all shift states.

Example Next, an example of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a V-belt 3 of a V-belt type continuously variable transmission is stretched around an input pulley 1 and an output pulley 2 to transmit the two. The V-belt 3 has a trapezoidal metal block 4 having horizontal slits 5 on both sides, and a plurality of endless metal bands 8 on the slits 5 on both sides, as shown in the cross section of FIG. It is configured by fitting a plurality of (for example, eight) laminated metal bands 9 and connecting a plurality of them. Then, from the slit 5 of the block 4, the left and right sides are made into tapered pulley contact surfaces 6 on both sides, and the first and second sides are formed on both sides.
As shown in the figure, a taper 7 is provided to facilitate the bending of the V-belt 3.

In the transmission device including the output pulley 1, the input pulley 2 and the V belt 3 described above, the width of the output pulley 1 and the width of the input pulley 2 are relatively changed according to the shift of the continuously variable transmission (not shown in the overall view). While changing, the V-belt 3 continuously moves between the solid line and the chain double-dashed line in the operation explanatory view of FIG. 1 and the perspective view of FIG. 3, respectively, but in the axial direction (sliding of the output pulley 1 and the input pulley). When viewed from the direction), the V-belt 3 always passes through the predetermined portions A and B shown in FIG.
In this embodiment, two sets of nozzles 10, which are supply ports for injecting lubricating oil from both sides toward the V belt 3, are attached to these portions A and B as V belt lubrication means.

If the nozzle 10 is arranged in this way, the lubricating oil is constantly injected from the nozzle 10 so that the lubricating oil is always poured directly onto the metal band 9 and sufficiently cooled, and heat generation and wear of the V-belt 3 are suppressed. To be done.

In the above embodiment, the nozzle 10 was used as the supply port for injecting the lubricating oil, but it goes without saying that a pipe 12 having an injection port 11 as shown in FIG. 4 may be used.

If two sets of the nozzle 10 or the injection port 11 are provided for the parts A and B, sufficient lubrication is performed. However, when the injection amount of the lubricating oil is large, either one of the parts A and B is provided. 1
Only a set may be provided, or only one may be provided for each of the portions A and B.

Further, the same effect can be obtained by using the lubricating means as shown in the above embodiment in a V-belt type continuously variable transmission using a V-belt of a type in which metal blocks having trapezoidal cross sections are connected to each other by a chain. It is a thing.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of a V-belt type continuously variable transmission, FIG. 2 is an explanatory view showing V-belt lubricating means in a V-belt type continuously variable transmission as one embodiment of the present invention, and FIG. FIG. 4 is a perspective view showing another V-belt lubricating means. 1 ... Input pulley, 2 ... Output pulley, 3 ... V belt, 4 ... Metal block, 5 ... Slit, 9 ... Layered metal band, 10 ... Nozzle (supply port), 11 ... Injection Port (supply port), A, B ... (predetermined) part

Claims (2)

[Claims] 1. A V which is stretched between an input pulley and an output pulley whose widths change relative to each other according to a gear ratio.
A V-belt type continuously variable transmission in which a belt is composed of a metal block and a connecting member of the metal block,
Regardless of the change in the gear ratio of the V-belt type continuously variable transmission, when viewed from the sliding direction of the both pulleys, a predetermined portion between the both pulleys through which the V-belt always passes is provided from the sliding direction of the two pulleys. A V-belt type continuously variable transmission characterized by having a supply port for injecting lubricating oil toward the V-belt. 2. A V-belt comprising a plurality of trapezoidal metal blocks having horizontal slits on both sides, and a plurality of metal blocks fitted in the slits and connected together. V according to claim 1
Belt type continuously variable transmission.