RAIL GRINDING MACHINE FOR GRINDING RAILS OF A TRACK

Abstract

A rail grinding machine for grinding rails of a track has a machine frame, on which guide rollers for manual movement of the rail grinding machine in a longitudinal direction are mounted. By use of a cross slide, which is mounted on the machine frame, a grinding unit can be moved in a transverse direction. The cross slide contains a closed cross slide frame, which extends in the longitudinal direction and the transverse direction. The closed cross slide frame enables a simple and stable construction of the rail grinding machine and flexible adjustability of the grinding unit.

Claims

11. A rail grinding machine for grinding rails of a track, the rail grinding machine comprising: a machine frame; a plurality of guide rollers for manual movement of the rail grinding machine in a longitudinal direction, said guide rollers being rotatably mounted on said machine frame; a cross slide mounted on said machine frame in such a way as to be movable in a transverse direction, said cross slide having a closed cross slide frame; and a grinding unit being movable in the transverse direction by means of said cross slide.

12. The rail grinding machine according to claim 11, wherein said closed cross slide frame has longitudinal members and crossmembers, said crossmembers extending in the transverse direction and are connected to said longitudinal members extending in the longitudinal direction.

13. The rail grinding machine according to claim 11, wherein for movement in the transverse direction, said cross slide has a plurality of cross slide guide rollers, which are disposed spaced apart in a vertical direction.

14. The rail grinding machine according to claim 11, further comprising a guide frame disposed on said cross slide.

15. The rail grinding machine according to claim 14, wherein said guide frame is mounted on said cross slide in such a way as to be pivotable about a pivoting axis extending parallel to the longitudinal direction.

16. The rail grinding machine according to claim 14, wherein said guide frame contains two guide columns and a connecting member connecting said two guide columns.

17. The rail grinding machine according to claim 14, wherein said grinding unit is mounted on said guide frame in such a way as to be movable in a vertical direction.

18. The rail grinding machine according to claim 14, further comprising a grinding unit support mounted on said guide frame in such a way as to be movable in a vertical direction, said grinding unit is secured on said grinding unit support.

19. The rail grinding machine according to claim 18, wherein said grinding unit support contains a closed support frame.

20. The rail grinding machine according to claim 18, wherein said guide frame has guide columns, said grinding unit support is mounted movably on said guide columns of said guide frame.

Description

[0016] Further features, advantages and details of the invention will become apparent from the following description of an illustrative embodiment. In the drawings:

[0017] FIG. 1 shows a first perspective view of a rail grinding machine,

[0018] FIG. 2 shows a second perspective view of the rail grinding machine in FIG. 1,

[0019] FIG. 3 shows a side view of the rail grinding machine in FIG. 1,

[0020] FIG. 4 shows a sectional view of the rail grinding machine along section line IV-IV in FIG. 3,

[0021] FIG. 5 shows a plan view of a machine frame and a cross slide, guided thereon, of the rail grinding machine,

[0022] FIG. 6 shows a perspective view of the cross slide and of a grinding unit, which is mounted in a linearly movable and pivotable manner on the cross slide by means of a guide frame and of a grinding unit support, and

[0023] FIG. 7 shows a perspective view corresponding to FIG. 6 without the grinding unit.

[0024] A rail grinding machine 1 is in each case used to grind one rail 2 of a track and has a machine frame 3, which is guided on the rail 2 via guide rollers 4. By way of an outrigger 5, the machine frame 3 is supported on the other rail 2 of the track via guide rollers 4. Arranged on the machine frame 3 is a handle 6, by means of which the grinding machine 1 can be moved manually on the rails 2. The guide rollers 4 define a direction of movement of the grinding machine 1, which is also referred to below as the longitudinal direction or x direction.

[0025] The machine frame 3 has machine frame longitudinal members 7, 8 and machine frame crossmembers 9, 10, which are connected to one another, with the result that the machine frame 3 has a closed shape. The machine frame longitudinal members 7, 8 extend in the x direction and are spaced apart in a y direction perpendicular to the x direction. The y direction is also referred to below as the transverse direction. The machine frame crossmembers 9, 10 extend in the y direction and are spaced apart in the x direction. At the ends, the machine frame crossmembers 9, 10 are secured on the machine frame longitudinal members 7, 8, with the result that the machine frame 3 has a rectangular shape. The outrigger 5 is arranged in the machine frame crossmembers 9, 10 in a manner which allows a telescopic movement, and therefore the guide rollers 4 are spaced apart in a variable manner in the y direction.

[0026] A cross slide 11 is mounted on the machine frame 3. The cross slide 11 can be moved relative to the machine frame 3 in the y direction by means of a cross slide spindle drive 12. The cross slide 11 has a closed cross slide frame 13, which is formed by longitudinal members 14, 15 and by cross-members 16, 17. The longitudinal members 14, 15 extend in the x direction and are spaced apart in the y direction. The longitudinal members 14, 15 are connected to one another at the ends by means of the crossmembers 16, 17, with the result that the cross slide frame 13 has a rectangular shape in plan view. The crossmembers 16, 17 extend in the y direction and are spaced apart in the x direction.

[0027] The crossmembers 16, 17 each comprise a first portion 18, which connects the longitudinal members 14, 15 to one another, and a second portion 19, which—when viewed in a vertical direction—extends downward approximately centrally from the respective first portion 18. The vertical direction is also referred to below as the z direction and is perpendicular to the x direction and the y direction. The x, y and z directions thus form a Cartesian coordinate system.

[0028] First cross slide guide rollers 20 are rotatably mounted on the respective crossmember 16, 17, on the respective first portion 18, on both sides of the associated second portion 19. Moreover, a second cross slide guide roller 21 is rotatably mounted on the respective crossmember 16, 17, on the respective second portion 19. The first cross slide guide rollers 20 are mounted at a distance from the second cross slide guide rollers 21 in the z direction, with the result that the first cross slide guide rollers 20 rest against an upper side of the machine frame 3, whereas the second cross slide guide rollers 21 rest against a lower side of the machine frame 3. The cross slide guide rollers 20, 21 have a self-centering cross-sectional shape, and therefore the cross slide 11 is guided in a self-centering manner on the machine frame 3.

[0029] The cross slide spindle drive 12 is secured on the cross slide 11 and the machine frame 3 and can be actuated manually by means of a handwheel 22, thus enabling the cross slide 11 to be moved in the y direction.

[0030] A guide frame 23 is mounted on the cross slide 11 in such a way as to be pivotable about a pivoting axis 24. The guide frame 23 comprises two guide columns 25, 26 and a connecting member 27 connecting the guide columns 25, 26. At the ends, the guide columns 25, 26 are each arranged on one of the second portions 19 of the crossmembers 16, 17. For this purpose, the guide columns 25, 26 are connected to the cross slide frame 13 by means of a respective pivot bearing 28, 29. The pivot bearings 28, 29 comprise pivot pins, which, starting from the second portions 19, extend through associated holes in the guide columns 25, 26 and thus form the pivoting axis 24. The pivoting axis 24 extends parallel to the x direction. When viewed in plan view, the closed cross slide frame 13 delimits an interior space in which the guide frame 23 is mounted.

[0031] The guide columns 25, 26 extend parallel to one another and are connected by means of the connecting member 27 at an opposite end from the pivoting axis 24. The guide frame 23 thus has a U shape. To pivot the guide frame 23, the grinding machine 1 has a guide frame drive 30. The guide frame drive 30 is secured on the cross slide 11 and the guide frame 23 and can be actuated manually by means of a handwheel 31. The guide frame 23 is pivotable relative to the cross slide 11 through at least 60°, in particular through at least 90°, and, in particular, through at least 120°, around the pivoting axis 24.

[0032] The grinding machine 1 has a grinding unit 32, which is mounted on the guide frame 23 by means of a grinding unit support 33. The grinding unit 32 can thus be moved in the y direction by means of the cross slide 11 and pivoted about the pivoting axis 24 by means of the guide frame 23. The grinding unit support 33 is arranged on the guide frame 23 in such a way as to be pivotable in the z direction. The grinding unit support 33 comprises a closed support frame 34. The support frame 34 is formed by support columns 35, 36 and by longitudinal members 37, 38 connecting said columns. The support columns 35, 36 are of tubular design. The guide columns 25, 26 each extend through one of the support columns 35, 36, with the result that the latter columns are guided movably on the guide columns 25, 26. At the ends, the support columns 35, 36 are connected by the longitudinal members 37, 38, with the result that the support frame 34 forms the closed shape. The longitudinal members 37, 38 extend in the x direction and are spaced apart in the z direction. The grinding unit 32 is secured in a fixed manner, i.e. without the ability for movement, on the first longitudinal member 37, that nearer to the cross slide 11. For movement of the support frame 34, the grinding machine 1 has a grinding unit spindle drive 39, which is secured on the connecting member 27 and on the second longitudinal member 38, which is further away from the cross slide 11. The grinding unit spindle drive 39 can be actuated manually by means of a handwheel 40.

[0033] The grinding unit 32 has a drive motor 41 and a grinding tool 42, which can be driven in rotation about an axis of rotation 43 by means of the drive motor 41. When viewed in the z direction, the grinding tool 42 is arranged below the longitudinal member 37, whereas the drive motor 41 is arranged above the longitudinal member 37. The drive motor 41 extends at least partially into an interior space delimited by the support frame 34.

[0034] By virtue of the closed machine frame 3, the closed cross slide frame 13 and the closed support frame 34, the grinding machine 1 has a simple and stable construction. By virtue of the linearly movable cross slide 11, the pivotable guide frame 23 and the linearly movable grinding unit support 33 or support frame 34, the grinding unit 32 can be adjusted in a flexible manner to grind rails 2.