SU35885A1 - Arrow switch - Google Patents

Description

In practice, it is very often the case when the movement of cars along a switch proceeds in two directions (see Fig. 3, where the movement of cars is indicated by arrows). When moving along arrow A, the wagon of its wheel should press the feather out of the wheel so that the latter becomes parallel to the frame rail. In numbers, this will range from 90 to 100 mm. A spring is usually placed to return the sharps to their former position. This simplest mechanism has a whole range of drawbacks. Requirements are made to it: tight pressing of the points, slight resistance when opening, smooth closing of the arrow. The spring cannot give all these conditions together, that is, if it presses well sharply, it hits the frame rail and has a large b resistance when opening; if she has no last flaws, then there is the first one, which is no less bad than others.

The proposed switch is intended to eliminate the above disadvantages.

By design, this contactor is of a known type, in which the pointer traction is connected with a swing lever provided with a guide surface for a roller attached to one end of a spring, the other end of which is fixed pivotally on a fixed support.

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In FIG. 1 and 2 depict a switch closure in two projections; FIG. 3-arrow diagram.

In the drawing, the poles / are in the extreme right position; in the closed state. When the moving car with its flange begins to push them away, the first time the spring 2 forcefully holds and holds the sharks in the closed state, resisting this movement, but when the curvilinear lever 3 moves away slightly, the roller 4 rolls over the curved surface of the lever 3 to the upper barrier a and relieves, to a large extent, the movement of the ribs 7. In order for this movement to be performed quite clearly, it is necessary to make the roller 4, the spring 2 and its housing 5 as light as possible.

The car passes through the arrow. For the past car, the spring 2 is first with a small moment and, therefore, presses on the points 7 and brings them to the closed state; by this moment, the curvilinear lever 3 moves beyond the line, after which the slope of its curved surface relative to the center O changes its direction, and the roller 4, as a result, rolls down to the lower barrier 6 of the curvilinear lever 3, and the spring presses on with the maximum moment pins 7, clamping them to the frame rail.

As can be seen from the description, the impact of the sharp / frame rail, which is so dangerous for the former, since they are thus strongly bent, if they are not made of special steel, is completely eliminated, tight pressing of the sharp is achieved / and their easy opening, for spring 2 resists only the first time. All efforts are confirmed by fine adjustment, and there is no danger in refusing to work.

The subject matter of the invention.

An arrow contactor, in which an arrow switch ha is pivotally connected with a swivel lever, equipped with

a guide surface for a roller attached to one end of a spring, the other end of which is fixed pivotally on a fixed support, characterized in that the guide surface for roller 4 is curved in such a way that when turning the lever 3 the length of the spring 2 changes only slightly, and The varying ratio of the arms of the lever 3 allowed us to maintain a constant moment of force pressing the pins to the frame rail in order to eliminate the strong impacts of the pins on the frame rails when translating the arrow.

Fig2