JPS587166Y2 - Belt setting device in continuously variable transmission mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt setting device that moves a tensioner pulley in a continuously variable belt transmission mechanism and changes the pulley diameter of the continuously variable transmission pulley to change speed.

As shown in FIGS. 4 and 5, a belt setting device in a conventional continuously variable speed belt transmission mechanism passes a V-belt 3 between a pulley 1 and a heated variable speed pulley 2 that face each other, and attaches it to a holder 1. Tension is applied to the V-belt 3 by a pair of pivotally supported tensioner rollers 5.6, and the pulley diameter of the continuously variable speed pulley 2 is changed to perform speed changes.

The holder I is slidably supported by the frame 4 via an elongated length 18 of the frame 4, and is moved in the left-right direction along the frame elongated hole 18 by a screw shaft 8 also pivotally supported by the frame 4.

The screw shaft 8 is moved by the stopper 10.11.
It is prevented from being pulled out in the axial direction, and has a handle 9 at one end.

In order to keep the adjustment range of the gear ratio constant and prevent loads from being applied to the belt, it is necessary to restrict the movement range of the tensioner rollers 5, 6 and holder I.
An adjustment screw 15 and a pair of adjustment nuts 16 fitted thereto are provided at one end, and engage with a protrusion 19 provided at one end of the holder I.

In the above configuration, each time the belt is replaced, the pair of adjustment nuts 16 must be moved to appropriately adjust the movement range of the holder I, that is, the pulley diameter dtd', depending on the variation in belt length. The disadvantage is that it is difficult to operate.

The purpose of the present invention is to eliminate the drawbacks of the prior art described above and to facilitate operability.

This invention is based on the calculation of the relationship between the tensioner pulley set position and the moving distance when the pulley diameter of the continuously variable speed pulley changes from the maximum value to the minimum value. If a stopper plate is installed to easily regulate the tensioner pulley, and if the stopper plate is set when the pulley diameter of the continuously variable speed pulley is at its maximum for a specific belt, the tensioner pulley will automatically move until the pulley diameter is at its minimum. It was designed to be regulated.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

A projection 21 projects downward from the pulley holder 7.

Reference numeral 13 denotes a substantially fan-shaped stopper plate rotatably supported on the main body of the apparatus by a fulcrum pin 12, and an arcuate long hole 20 is formed at the tip thereof, and a fixing bolt 14 is engaged with the stopper plate.

A hole is formed in the center of the stopper plate 13, and the edge thereof is provided with a stepped retaining portion 17 that engages with the protrusion 21 to restrict the movement range of the pulley holder 7.

In the above configuration, any belt can be shaded between the pulleys,
Rotate the handle 9 to rotate the screw shaft 8,
To stretch a belt 3 between both pulleys without slack while the continuously variable speed pulley 2 is at its maximum diameter.

When the pulley holder I is in this position, rotate the stopper plate 13 to select an arbitrary abutment hole 17 so that the protrusion 21 and the abutment hole 17 are engaged, and in this position, the belt 1
4 fixes the stopper plate 13.

As a result, the pulley holder 7 and the tensioner pulley 5
, 6 is automatically regulated by the length ff' of the abutment hole 17 of the stopper plate 13, and the continuously variable speed pulley 2 is moved within the range of the maximum diameter d and the minimum diameter d', that is, the same gear ratio. used within the range of

According to the present invention, as described above, by providing a stopper plate with multiple adjustment ranges set in advance to accommodate variations in belt length, it is extremely easy to adjust the use of the continuously variable speed boob at its maximum and minimum diameters. It has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention. FIG. 2 is a plan view thereof, and FIG. 3 is a longitudinal sectional view taken along line B and B in FIG. 1. FIG. 4 is a front view showing a conventional belt setting device, and FIG. 5 is a plan view thereof. 1 is a boot 1ha, 2 is a continuously variable speed pulley, 3 is a belt, 5.
6 is a tensioner pulley, T is a pulley holder, 13 is a stopper plate, 17 is an abutment hole, and 21 is a protrusion.

Claims (1)

[Scope of utility model registration request] A continuously variable speed pulley, a booby facing the continuously variable speed pulley, the continuously variable speed pulley and a belt stretched between the boosters, and a main body frame that is movably supported to the left and right and moved in the left and right direction by a screw shaft. In the continuously variable transmission mechanism, the pulley holder is provided with a protrusion and engaged with the protrusion. A belt setting device in which a stopper plate having a plurality of holes continuously provided in the edge of a plurality of engaging portions that fit together is movably and fixedly fixed to a transmission mechanism main body.