RU2559608C2 - Device to control tension of guy lines - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of facilities to control tension of guy lines in antenna posts. The device comprises the first and second connection links, a base, a double two-arm lever and a compressible element in the form of a bent sheet spring with slots. The base comprises the main plane of the base with shelves arranged on it. The double two-arm lever is formed by two parallel arranged plates and their three axes that connect them. By the first axis the lever is connected to shelves of the base, on the second axis there is the first connecting link fixed, and the third axis rests against the bent sheet spring with slots. The spring with ends rests against the main plane of the base, and the shelves of the base enter the spring slots. The second connecting link is fixed on the shelves of the base. On external surfaces of the base shelf and the plate of the double two-arm lever there are lines, matching which signals achievement of the required stretching force applied to the device via the first and second connecting links.

EFFECT: reduced dimensions of a device.

2 cl, 3 dwg

Description

The invention relates to radio engineering, and in particular to devices for controlling the tension of guy wires of antenna mast devices, and serves to provide a calculated load acting on antenna mast devices from the side of guy wires fastening them.

Known tensioner [1], selected for the prototype, containing the first connecting link for attachment to the support, the second connecting link for attaching to the fixed device, connected to the connecting links of the housing, a compressible element located inside the housing and an indicator indicating the achievement of a certain tensile force between the fixed device and support when compressing a compressible element.

The disadvantage of this device is that the compressible element must develop a force equal to the operational tension of the fixed device, and this, in turn, determines the mass and dimensions of the tensioner. The use of these devices for the deployment of mobile antenna mast devices will cause difficulties due to the fact that during installation and dismantling it is necessary to transfer the devices manually from the storage location to the locations of the supports and vice versa, and after dismantling, considerable space is required for their storage and transportation.

The purpose of the invention is the reduction of weight and size characteristics of the device.

This goal is achieved in that the device for controlling the tension of guy wires contains a compressible element, which is a curved leaf spring installed on the base, to which a double two-arm lever is connected, the shoulders of which do not lie on one straight line, the lever is connected with the first connecting link to the first link, the base connected to the second connecting link. Through the connecting links, the tensile external force applied to the device is transmitted by the second shoulder of the double two-shouldered lever to the spring, straightening it, and the force that straightens the spring is less than the tensile force applied to the device due to the ratio of external forces to internal reactions in kinematic pairs of the device. Thus, due to the design of the compressible element in combination with the reduced load acting on it, the mass and dimensions of the elastic element, and therefore the entire device as a whole, are reduced.

The invention is illustrated by drawings, where:

figure 1 shows a device for controlling the tension of guy rods in a perspective view;

figure 2 is a device for controlling the tension of guy wires in a section in a perspective view;

figure 3 - spring in a perspective view.

The device comprises a base 1, formed by the main plane 2 and the shelves 3, a double two-arm lever 4, the shoulders of which do not lie on one straight line, formed by two parallel plates 5 and connecting them with three axes, the first axis 6, the lever 4 is connected to the shelves 3 of the base 1, on the second axis 7, the first connecting link 8 is fixed, and the third axis 9 is supported by a compressible element made in the form of a curved leaf spring 10 with grooves 11, the spring ends abut against the main plane 2 of the base 1, and the shelves 3 of the base fall into the grooves 11 of the spring 10, the second connecting link 12 is fixed on the shelves of the base, risk 13 is performed on the outer surface of the shelf 3 of the base 1, and risk 14 is performed on the plate 5 of the double two-armed lever 4, the combination of which signals the achievement of the required tensile force applied to the device through the first 8 and second 12 connecting links.

The device operates as follows.

The first connecting link 8, the device for controlling the tension of the guy rods is connected to the support through a tension device, such as a lanyard, and the second connecting link 12 is connected to the guy of a fixed antenna mast device. When the guy pulls, the external tensile force from the connecting links 8 and 12 is transmitted to the base 1 and the double two-arm lever 4, while the lever 4 tends to rotate around the first axis 6 connecting it to the shelves 3 of the base 1 so that the line of action of the tensile forces passes through the shoulder of the double two-shouldered lever 4, containing the first 6 and second 7 axis, and the attachment point of the second connecting link 12 to the base 1, however, because the shoulders of the lever 4 do not lie on one straight line, and the shoulder containing the second 6 and third 9 axes , through the axis 9 it relies on a curved leaf spring 10, from the side of the spring 10 a reaction occurs that prevents the free rotation of the lever 4. As the external force increases, the lever 4, turning around the axis 6, presses the spring 10, straightening it, and the risk 14, located on the plate 5 of the lever 4, it draws closer to the risk 13 located on the shelf 3 of the base 1. The combination of figures 13 and 14 indicates that the external force has reached the calculated value and the tension of the guy should be stopped.

Without changing the dimensions of the device, it is possible to use it to control large tensile forces, both by changing the power characteristics of the springs 10, and by increasing the number of springs 10 stacked on top of each other, and applying marks corresponding to the controlled forces.

Positive effect: in general, the proposed device has a relatively small weight and size, which ensures ease of use for mobile antenna mast devices.

The source of information

1. Application US No. 20120234954 A1, M. cl. B65H 59/40, 09/20/2012

Claims (2)

1. A device for controlling the tension of guy wires, containing the first and second connecting links, a base, a compressible element and an indicator, characterized in that the base contains the main plane of the base with the shelves located on it, an additional double two-arm lever is formed, formed by two parallel plates and connecting their three axes, and the shoulders of the lever do not lie on one straight line, the first axis of the lever is connected to the shelves of the base, the first connecting link is fixed on the second axis, and the third axis is They are pressed onto a compressible element made in the form of a curved leaf spring with grooves, with the spring abutting against the main plane of the base, the base shelves enter the grooves of the spring, and the second connecting link is fixed on the base shelves, while on the outer surfaces of the base shelf and double two-shouldered plate leverage risks are performed, the combination of which signals the achievement of the required tensile force applied to the device through the first and second connecting links. 2. The device according to claim 1, characterized in that it additionally introduced one or more leaf curved springs stacked on top of each other.

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