HRP20191537T1 - Single-piece cast steel frog for a railway crossing - Google Patents

Claims (9)

1. Crossing assembly for railway switches with wooden sleepers, which is designed to allow the passage of railway vehicles at a maximum speed of 120 km/h in the straight direction and at a maximum speed of 40 km/h in the turning direction, the said intersection assembly having a base plate (5), slotted guides (6a, 6b) and structural parts that include wing rails (1a, 1b) that have a break line (16a, 17a), a diverter heart (2) that ends in one point (3) and forked rails ( 4a, 4b), where the mentioned structural parts are attached to each other from below with a base plate (5), while slotted guides (6a, 6b) that pass between the longitudinal side surfaces of the switch heart (2) and the inner side surfaces of the wing rails (1a, 1b), serve to guide the wheels of the railway vehicle, whereby the base plate (5) that connects the wing rails (1a, 1b) with the switch core (2), includes in relation to the direction of travel (a) of the railway vehicle before the switch core (2) , a horizontal or substantially horizontal surface (5a) in one non-controlled section (15) of slotted guides (6a, 6b) immediately next to the break line (16a, 16b) of the wing rails (1a, 1b), and the intersection assembly is made as an element of of cast steel in one piece, characterized by the fact that starting from the specified horizontal or substantially horizontal surface (5a), a transition surface (8) is formed which is inclined at an upward angle that extends towards the vicinity of point (3) from the switch heart (2) , and thus, that in the non-controlled section (15) of the slotted guides (6a, 6b) there are reinforced elements (10a, 10b, 10a', 10b') on the outside of the wing rails (1a, 1b), which limit the non-controlled section (15) , and which are made by thickening the wing rails (1a, 1b). 2. The intersection assembly in accordance with patent claim 1, characterized by the fact that the transition surface (8) is constructed with two sections (8a, 8b) of different lengths and at different angles to the horizontal, which are connected to each other by a rounded edge element (8c). and the lower front section (8a) is at an angle of 28 to 36 degrees, preferably from 30 to 33 degrees to the horizontal, while the upper rear section (8b), which extends towards the edge element (8c), is horizontal or substantially horizontal; and the ratio of the length of the front section (8a) compared to the length of the rear section (8b) is approximately 1:6, preferably 1:5.2. 3. Junction assembly according to claim 1 or 2, characterized in that the wing rails (1a, 1b) have rear end parts (1a', 1b') which are inclined at an angle outwards with respect to the direction of travel (a) vehicles and in the range of these end parts (1a', 1b'), the end sections of the slotted guides (6a, 6b) have a cross-section that expands outwards. 4. Junction assembly in accordance with patent claim 3, characterized in that the base plate (5) has a reinforced part - preferably bold - near the end parts (1a', 1b') of the wing rails (1a, 1b), and are along the end parts (1a', 1b') of the shaped transitional surface (11a, 11b) in the end sections of the slotted guides (6a, 6b), which come out of the base plate (5) inclined at an angle from top to bottom. 5. Assembly of the intersection in accordance with patent claim 4, characterized by the fact that the inclined transition surfaces (11a, 11b), which are made on the end sections of the slotted guides (6a, 6b), are at an angle between 25 and 30 degrees to the horizontal. 6. Junction assembly according to any one of claims 1 to 5, characterized in that at the point where the forked rails (4a, 4b) exit the switch heart (2), the base plate (5) connects the forked rails (4a, 4b). one behind the other and with the switch heart (2), and here a transitional surface (7) is formed, which is inclined at an angle from top to bottom. 7. Junction assembly in accordance with patent claim 6, indicated by the fact that the angle of inclination of the inclined transitional surface (7), which is made at the point where the forked rails (4a, 4b) exit the switch heart (2), is between 115 and 125 degrees , preferably around 120 degrees, relative to the horizontal. 8. The junction assembly according to any one of claims 1 to 7, characterized in that slits (18, 19) are formed in the base plate (5) which pass longitudinally and serve the purpose of making the common junction assembly easier. 9. Junction assembly according to claim 8, characterized in that the slits (18, 19) preferably become wider in the downward direction and substantially pass along the entire length (b) of the base plate (5); while their depth (m) changes in such a way that, following the surface of the intersection assembly, and the volumes in the cushioned cross-sections are preferably the same, while their ratio preferably changes between a maximum of about 10 to 40%.