RU159955U1 - TIGHTENING DEVICE FOR REVERSIBLE TRANSMISSIONS WITH FLEXIBLE COMMUNICATION - Google Patents

Abstract

Flexible tensioner for reverse gears with a flexible coupling, including a bracket mounted to rotate in the plane of the flexible coupling, with two tension rollers, one of which interacts with the leading branch of the flexible coupling, and the other with the driven branch, characterized in that the bracket with two tension rollers mounted on the drive shaft of the transmission, and the tension rollers are placed on the outside of the flexible connection of the transmission.

Description

Flexible linkage tensioner

The technical solution relates to mechanical engineering, namely to mechanical gears, and can be used in reverse gears with flexible communication of mining, hoisting-and-transport and other machines.

Known transmission with flexible communication on.with. USSR No. 1427119, F16H 7/12, publ. 09/30/1988, Bull. No. 36, containing the driving and driven pulleys, covering their flexible connection, placed between the branches of the last bracket, mounted on it with the ability to rotate the two shoulders lever, at the ends of which tension rollers are fixed for interaction with the leading and driven branches of the flexible coupling, the shoulders of the two shoulders made of different lengths and on the larger of them a tension roller is installed for interaction with the driven branch of flexible communication, and one of the tension rollers is placed on the outside of the corresponding branch of the latter.

A significant drawback of a flexible coupling transmission is the location of the tensioner in the form of an arm with a two-arm lever with shoulders of different lengths and tension rollers between the drive and driven pulleys. This does not allow the use of this design in reverse gears, as the shoulders of the two shoulders of the lever, made of different lengths, when reversed, will give different values of the tension of its leading branches. As well as the known transmission, it is impossible to use with small interaxal distances of the pulleys, when there is not enough space to install a tensioner between them. These disadvantages of the known transmission with a flexible connection narrow the scope of its application.

The closest analogue in terms of technical nature and the totality of essential features is a tensioning device for reverse gears with flexible coupling according to AS USSR No. 413114, F16h 7/12, publ. 01/30/1974, Bull. No. 4, comprising a bed, a spring and two tension rollers, one of which interacts with the leading branch of the flexible connection, and the other with the driven branch, and an element connecting them, which is made in the form of a bracket mounted on the bed rotary in the plane of the flexible connection and spring-loaded in the direction of rotation, and two levers pivotally connected to the bracket, levers, one ends of which are interconnected by a spring, and tension rollers are placed at the other ends.

A disadvantage of the known tensioning device is also its location between the leading and driven pulleys, which does not allow the use of this design in gears with small interaxal distances of pulleys in which there is not enough space to install the specified design of the tensioning device, this narrows the scope of its application.

The technical task of the proposed solution is to expand the scope of the tensioning device for reverse gears with flexible coupling due to the possibility of using it in flexible communication gears having different center distances by changing the mounting location of the bracket with tensioning rollers.

The problem is achieved due to the fact that in the tensioner for reverse gears with flexible coupling, including a bracket mounted to rotate in the plane of the flexible coupling, with two tension rollers, one of which interacts with the leading branch of the flexible coupling, and the other with driven branch, according to the technical solution, the bracket with two tension rollers is installed on the drive shaft of the transmission, and the tension rollers are placed on the outside of the flexible connection of the transmission.

The proposed technical solution makes it possible to implement reversible mechanical gears with various flexible couplings and different axle distances due to the installation of an arm with tension rollers on the drive transmission shaft. This allows you to locate the leading and driven transmission links and at a small distance from each other, which expands the scope of the tensioner for reverse gears with flexible coupling.

The essence of the technical solution is illustrated by an example of a specific embodiment of the tensioning device for reverse gears with flexible coupling and the drawings of FIG. 1-4. In FIG. 1 presents a General view of the proposed tensioning device with a belt drive, in the initial position, section BB in FIG. 2; in FIG. 2 is a section AA in FIG. one; in FIG. 3 - the position of the device in the direct course of transmission; in FIG. 4 - the same with reverse gear movement.

The tensioning device for reverse gears with the leading link 1, the driven link 2 and the flexible coupling 3 consists of an arm 4 (Fig. 1-4), mounted rotatably in the plane of the flexible coupling 3, with two tension rollers 5, 6 interacting with flexible connection 3. One of the tension rollers 5, 6 interacts with the leading branch of the flexible connection 3, and the other with its slave branch (Fig. 3, 4). The bracket 4 with the tension rollers 5, 6 is mounted on the drive shaft, for example, on the hub of the driving link 1 (Fig. 2), and the tension rollers 5, 6 are placed on the outside of the flexible connection 3 gears (Fig. 1, 3, 4). The tension rollers 5, 6 are mounted on the movable axes 7, 8 (Fig. 1), which are installed with the possibility of movement and fixing in the grooves 9, 10, respectively, made in the bracket 4.

The tension device operates as follows.

In the initial position (the driving link 1 of the transmission does not rotate), the bracket 4 with the tension rollers 5, 6, placed on the outside of the flexible connection 3 (belt), takes a neutral position (Fig. 1). The movable axis 7, 8 with the tension rollers 5, 6 respectively move in the grooves 9, 10 towards each other and fix, thus providing the required tension of the flexible connection 3.

During transmission, the drive link 1 (Fig. 3) rotates counterclockwise. The leading branch of the flexible coupling 3 (right in Fig. 3) is tensioned, acts on the tension roller 5, the bracket 4 is rotated counterclockwise and the tension roller 6 pulls the driven branch (in Fig. 3 left) of the flexible coupling 3, ensuring normal transmission operation.

Turn on the reverse gear - the leading link 1 rotates clockwise (Fig. 4). The leading branch of flexible coupling 3 (left in FIG. 4) is tensioned, acts on the tension roller 6, the bracket 4 is rotated clockwise and the tension roller 5 pulls the driven branch (in FIG. 4 right) of the flexible coupling 3 of the gear, ensuring normal operation.

Next, the operation cycle of the tensioner is repeated.

Claims (1)

Flexible tensioner for reverse gears with a flexible coupling, including a bracket mounted to rotate in the plane of the flexible coupling, with two tension rollers, one of which interacts with the leading branch of the flexible coupling, and the other with the driven branch, characterized in that the bracket with two tension rollers mounted on the drive shaft of the transmission, and the tension rollers are placed on the outside of the flexible connection of the transmission.

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