RU36473U1 - Automatic V-belt variator - Google Patents

Description

Automatic clioremia variator

2003132914

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2 about 3 t 3

A utility model - an automatic V-belt variator belongs to the field of mechanical engineering and can be used to control the rotation speed of the driven shaft, in particular in motor vehicles and agricultural machines.

An automatic V-belt variator is known, which has a driven shaft, on which spring-loaded and fixed half-bolts and rolling elements 1 are mounted.

Its disadvantage is the high complexity in the manufacture and complexity of construction.

Of the known automatic V-belt variators, the closest one to the claimed one according to technical dryness, durability and design is the variator, containing the drive and driven shafts, consisting of half-cushions immovable and axially movable. Driving and driven pulleys cover the V-belt. A centrifugal regulator is located on the driving pulley, and a torque regulator is located on the driven pulley.

However, such a variator has the following disadvantages:

-necessity applied in transmissions of motor vehicles and agricultural machines of an additional clutch device;

-low reliability of the groove-pin controller in the moment;

- Low durability of a centrifugal ball or roller type regulator due to heavy loads.

The essence of the proposed utility model is that the automatic V-belt variator contains drive and driven shafts with drive and driven pulleys mounted on them, consisting of fixed and axially movable half-pulleys made in the form of conical disks with hubs. Driving and driven pulleys cover a V-belt. On the drive pulley mounted

a centrifugal regulator, and on the driven pulley - a torque regulator, characterized in that a roller mounted on the hub of the driving movable pulley is inserted into the variator, and the centrifugal regulator is made in the form of segments with conical ends pulled along the periphery by a spring and moving along radial guides. The moment regulator is made in the form of crackers mounted on the hub of the driven pulley, and an end cam with a curved surface mounted on the driven shaft, and the crackers are spring-loaded relative to the cam.

The essence of the proposed variator is illustrated by drawings (Fig. 1 general view, 2 - the regulator in time).

The automatic V-belt variator comprises a leading 1 and driven 2 shafts, a V-belt 3. On the driving shaft 1 there is a fixed half-cup 4 in the form of a conical disk with a hub and axially movable half-cup 5 in the form of a conical disk with a hub. On the hub of the fixed hemisphere 4, a ROlik 6 is installed. The introduction of the roller 6 provides automatic shutdown of the variator during engine idle.

Hub 4 with a hub and roller 6 and Hub 5 with a hub form a drive pulley, the movement of which is controlled by a centrifugal regulator, which includes load segments 7 and 8, pulled along the periphery by a spring 9 and moving along radial guides. Radial guides are made, for example, in the form of straight rods inserted into segments.

The implementation of the centrifugal controller in the form of segments 7 and 8, tightened by a spring 9 allows you to increase the contact area of segments 7 and 8 with the support disk 10 and half-shaft 5, reduces the load and increases the durability of the variator ...

2 conical discs with a hub forming a driven pulley, movement

which is regulated by a torque regulator, made in the form of crackers 13 mounted on the hub of the half-pulley 12, which move along the end cam 14 fixed to the driven shaft 2 with a curved working surface. Crackers 13 are constantly spring-loaded to the cam using a pressing spring 15.

The execution of the regulator in time in the form of crackers 13 mounted on the hub of the half-shell 12 and moving along the curved surface of the end cam 14 increases the reliability of the variator.

The variator works as follows. The rotation of the drive shaft 1 is transmitted to the drive pulley and through the V-belt 3 to the driven pulley and driven shaft 2.

At a low speed of rotation of the drive shaft 1, the belt does not touch the drive shaft, rests on a freely rotating roller 6 and does not transmit rotation to the driven pulley. The variator is idling. With an increase in the speed of rotation of the drive shaft 1, the action of centrifugal forces leads to the movement of the load segments 7 and 8 in the radial direction, and the moving pulley 5 - in the direction of the stationary pulley 4. The V-belt 3 with an increase in the speed of rotation of the drive shaft 1 is gradually captured by the half-bolts of the drive shaft and transfers rotation on driven pulley. Thus, the initial coupling function of the driving shaft 1 with the driven shaft 2 is provided. The driven pulley, the resulting rotational movement from the V-belt 3, transfers it to the driven shaft 2. Depending on the load on the driven shaft 2 and the speed of rotation of the driving shaft 1, the V-belt . it occupies an optimal position on the respective radii of the driving and driven pulleys and ensures optimal tension due to the torque regulator. When changing, the loads on the driven shaft 2 or. the rotational speeds of the drive shaft respectively change the radius of the V-belt.

, 9t93 / J-t / Y

3 The proposed automatic V-belt variator has passed

preliminary tests and accepted for serial production.

Sources of information taken into account when preparing the application:

1. Patent for the invention of the Russian Federation No. 2122670 6F16 H9 / 18, 55/56.

2. Patent for the invention of the Russian Federation No. 2186271 7F16 P9 / 16, 55/56.

4

Claims (3)

1. An automatic V-belt variator comprising drive and driven shafts, drive and driven pulleys mounted on them, consisting of fixed and movable half pulleys made in the form of conical disks with hubs, a V-belt covering the pulleys, a centrifugal regulator mounted on the drive pulley, and a torque regulator mounted on the driven pulley, characterized in that a roller mounted on the hub of the driving pulley is inserted into it, and the centrifugal regulator is made in the form of segments with conical ends pulled along the periphery, for example, by a spring, while the moment regulator is made in the form of crackers mounted on the hub of the driven shaft, and a cam mounted on the driven shaft. 2. Automatic V-belt variator according to claim 1, characterized in that the regulator crackers are spring-loaded relative to the cam. 3. Automatic V-belt variator according to claim 1, characterized in that the working surface of the cam of the regulator is curved in time.