Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B7/00—Switches; Crossings
  • E01B7/02—Tongues; Associated constructions

Definitions

• the present invention relates to a railroad switch system with switch tongues, each of which can be displaced with a bearing surface on a corresponding horizontal bearing surface of a switch caliper, or a railroad track brake system with brake beams mounted on both sides of a rail, each with a bearing surface on a corresponding horizontal Bearing surface of a fixed bearing body are displaceable.
• the two bearing surfaces which can be moved relative to one another have continuous metallic sliding surfaces and consist of the same material, namely of low-alloy steel.
• Such systems require good lubrication in order to achieve a low frictional resistance between the bearing surfaces and, in particular as far as the braking systems are concerned, in order to achieve a sufficient response speed in the intermittent actuation which often takes place with larger time interruptions. Since these systems are operated outdoors, lubrication means not only a significant amount of work, but also a non-negligible environmental impact. Due to the environmental influences, malfunctions such as jamming and delayed response can only be avoided with great maintenance.
• the object of the invention is to provide systems of the type mentioned which work without or with only minimal lubrication and meet all the requirements for functional reliability even under the most difficult environmental conditions.
• each switch saddle consists of several discrete partial bearing surfaces which are discontinuous in the direction of movement of the switch tongue are arranged and formed by coating parts applied to the switch saddle by means of a thermal application process
• the bearing surface of each brake beam consists of several discrete partial bearing surfaces which are arranged discontinuously in the direction of movement of the brake beam and by means of a thermal one on the brake beam Application process applied coating parts are formed.
• the coating parts can be formed by welding beads which, at least in sections, run inclined against the direction of movement.
• the welding beads preferably run parallel to one another.
• the coating parts can also be applied by thermal spraying.
• the coating parts preferably consist of an alloy of the following composition in percent by weight:
• FIG. 1 is a schematic plan view of a railroad track section with a track brake
• Fig. 3 is a perspective view of a brake beam seen from the bottom
• Fig. 4 is a top view of a switch saddle.
• Fig. 1 shows the usual arrangement of a track brake system, in which 1.2 brake beam pairs 3.4 and 5.6 are mounted horizontally, perpendicular to the rails on both sides of the rails.
• the brake beams such as 3, 4 rest on corresponding fixed bearing bodies 7, 8 and have guide bolts, such as 9, 10, which pass through openings 11, 12 in the bearing bodies.
• the actuating elements for moving the brake beam with respect to the wheel rim of a wheel indicated by 11 are not shown.
• the contacting flat bearing surfaces of a brake beam-bearing body pair such as 3.7 form a slide bearing, the sliding surfaces of the bearing body 7 being a flat, continuous surface, namely the surface of the bearing body, which generally consists of low-alloy steel.
• the sliding surface of the brake bar can be seen in the perspective view of such a bar 3 in FIG. 3. Accordingly, the sliding surface consists of discrete partial bearing surfaces such as 12, which are arranged discontinuously in the direction of movement of the bar indicated by the arrow F.
• These partial storage areas will be For example formed by welding beads which run parallel to one another at an angle to the direction of movement, but other coating parts applied by a thermal application method, such as thermal spraying, can also form such partial bearing surfaces.
• the inclination of the welding beads or coating parts 12 against the direction of movement F of the bar is essentially to achieve a low frictional resistance, as well as the very short, necessary response speed and the functional reliability with intermittent operation. Dust, sand and other particles are stripped from the discontinuous part-bearing surfaces during the movement thereof and removed via the gaps between these parts during the movement of the bar.
• composition of the coating material mentioned either makes lubrication superfluous or allows it to be kept in a very small scope. This is of great importance with regard to maintenance and pollution of the environment. Another advantage is that much less energy is required to actuate the brake and thus the operating and system costs can be reduced.
• FIG. 4 shows a turnout saddle in plan view, the bearing surface 13 of which is formed by welding beads applied obliquely to the direction of movement of the turnout tongue, not shown.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Braking Arrangements (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4215927

Family Applications (1)

Country Status (3)

Citations (6)

• 1989
  • 1989-05-02 CH CH167389A patent/CH682161A5/de not_active IP Right Cessation
• 1990
  • 1990-05-02 WO PCT/CH1990/000119 patent/WO1990013709A1/de active IP Right Grant
  • 1990-05-02 EP EP19900906109 patent/EP0425610B1/de not_active Expired - Lifetime

Patent Citations (6)

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