Rail bar grinding machine and method for grinding rail bars of track

Abstract

The rail grinding machine (1) comprises a machine frame (6), a rail guide unit arranged on the machine frame (6), a grinding unit (9), a height adjusting device (10) for adjusting the height of the grinding unit (9), and a handle (11) for manually moving the grinding unit (9), the grinding unit (9) comprising a drive motor (44) and a tool holder (47) for driving a grinding tool (49) in rotation about an axis of rotation (48). A guide (24) of the height adjustment device (10) defines a guide plane (E). The axis of rotation (48) is spaced apart from the guide plane (E), in particular in the region of the tool holder (47). As a result, the rail grinding machine (1) has a simple design and is convenient to use. In particular, the rail bar grinding machine (1) enables an unlimited field of view to a grinding point.

Description

[0001] The contents of German patent application DE 10 2024 209 981.3 are incorporated herein by reference. Technical Field

[0002] This disclosure relates to a rail grinding machine and method for grinding rails. The rail grinding machine is particularly capable of being manually moved and tilted by means of a handle. Specifically, the rail grinding machine is designed for manual movement and tilting on exactly one rail. Background Technology

[0003] DE 1 274 610 A (corresponding to US 3 427 758 A) discloses a rail grinding machine for grinding rails. The rail grinding machine is manually movable on exactly one rail. The rail grinding machine includes a chassis frame with rollers arranged on it. A machine frame is mounted on the chassis frame and positioned between the rollers. A frame component is mounted on the machine frame and is height-adjustable relative to the machine frame and the chassis frame by means of a screw drive mechanism. A grinding device is attached to the frame component and includes a drive motor. For grinding the rail, a grinding wheel can be driven to rotate about a rotation axis by means of the drive motor. For profile grinding of the rail, the machine frame with the grinding device pivots relative to the chassis frame. Summary of the Invention

[0004] The purpose of this disclosure is to create a rail grinding machine for grinding rails, which has a simple design and is very easy to use.

[0005] This objective is achieved by a rail grinding machine having the features of claim 1. The rail grinding machine is particularly movable on the rail and / or tilted on the rail by means of the handle. This particularly enables contour grinding of the rail using the grinding tool via rail head grinding and / or side grinding. The height adjustment device is arranged on the frame. The grinding unit is arranged on the height adjustment device for height adjustment relative to the frame. Better visibility of the grinding tool and the grinding point on the rail is achieved by spaced the axis of rotation of the grinding unit from the guide plane. The axis of rotation is spaced from the guide plane, particularly in the area of ​​the tool holder, such that during operation of the rail grinding machine, the area where the grinding tool held in the tool holder contacts the rail to be ground is spaced from the guide plane. The axis of rotation extends substantially parallel to the guide plane. The axis of rotation is spaced from the guide plane, particularly in the lateral direction. The lateral direction specifically constitutes the normal vector of the guide plane.

[0006] The guide plane is defined or stretched by the guide member. For example, if the guide member comprises two guide units, the guide plane is defined by the central longitudinal axis of the guide units. The guide plane extends particularly parallel to the longitudinal direction. If the rail grinder is located on the rail, the guide plane and / or the longitudinal direction extends particularly substantially parallel to the rail or the longitudinal direction of the rail. The guide member is preferably a linear guide member. The adjustment direction of the guide member extends particularly perpendicular to the longitudinal direction and / or perpendicular to the transverse direction.

[0007] The rail grinding machine is specifically designed for manual movement and / or manual tilting on exactly one rail. To this end, the rail grinding machine includes exactly two rail guide units for guiding the machine on exactly one rail. These two rail guide units are arranged longitudinally spaced apart from each other on the frame. Therefore, the frame is longitudinally positioned between the two rail guide units. When the rail grinding machine is positioned on the exact one rail, the longitudinal direction corresponds to the longitudinal direction of the rail. Specifically, the rail grinding machine does not have rail guide units for guiding the machine on adjacent additional rails. Because the entire rail grinding machine is tilted for grinding the rail (especially for contour grinding), the grinding unit cannot pivot relative to the frame. Therefore, the grinding unit can only be linearly displaced relative to the frame using the height adjustment device.

[0008] The height adjustment device and / or the grinding unit are preferably arranged longitudinally between the rail guide units. The rail guide units define a longitudinal axis. The guide plane is spaced laterally from the longitudinal axis of the rail guide units. The grinding unit is specifically arranged on the side of the guide plane facing the longitudinal axis. The rail guide units are preferably pivotable about the longitudinal axis relative to the frame. The handle is particularly pivotable about the longitudinal axis together with the rail guide units. For this purpose, for example, the handle is attached to the rail guide units in a fixed or lockable manner. The handle is pivotable and lockable relative to the rail guide units. The handle is particularly arc-shaped. The handle is spaced laterally from the guide plane.

[0009] The height adjustment device specifically includes a screw drive mechanism for adjusting the height of the grinding unit. The screw drive mechanism includes a screw axis. The screw axis may be arranged in or spaced apart from the guide plane. Preferably, the screw axis is spaced apart from the guide plane in the region of the tool holder. The screw axis may be spaced apart from the rotation axis. The screw axis may be arranged such that: in the region of the tool holder, the screw axis is located between the guide plane and the rotation axis; or the rotation axis is located between the guide plane and the screw axis; or the guide plane is located between the screw axis and the rotation axis.

[0010] The drive motor drives the tool holder to rotate about the axis of rotation. During operation of the rail grinder, the grinding tool is attached to or in the tool holder. The grinding tool can be driven to rotate about the axis of rotation via the drive motor through the tool holder. The tool holder is designed as a flange, to which the grinding tool is attached or screwed. For grinding the rail, the grinding unit and the grinding tool thereby driven to rotate can be moved and / or tilted relative to the rail to be ground by means of the handle. By spaced the axis of rotation of the tool holder from the guide plane, the guide does not obstruct the view of the rail head and the grinding tool, giving the operator an unrestricted view of the rail head and the grinding tool. The design of spaced the axis of rotation from the guide plane is simple. Therefore, the rail grinder has a simple design and is very easy to use.

[0011] The rail grinding machine according to claim 2 ensures a simple design and convenient use. The distance A of the rotation axis from the guide plane in the lateral direction ensures an unrestricted view of the rail head and grinding tools by the operator. The rotation axis is specifically spaced from the guide plane by this distance A in the area of ​​the tool holder. This distance A is substantially constant but may vary slightly depending on the angular position of the rotation axis. The distance A of the rotation axis from the guide plane is preferably within the range claimed in the entire area of ​​the tool holder. The grinding unit includes the drive motor and the tool holder, which can be driven to rotate by the drive motor. The grinding tools are preferably held in or attached to the tool holder. The grinding tools are designed, for example, as grinding wheels. The drive motor and / or the tool holder and / or the grinding tools preferably do not intersect the guide plane. For this purpose, the distance A is specifically selected accordingly.

[0012] The rail grinding machine according to claim 3 ensures a simple design and very convenient use. The frame is specifically designed as a machine frame. For this purpose, the frame includes the lower longitudinal member and the upper longitudinal member, as well as a first lateral member and a second lateral member. The lateral members connect the lower longitudinal member and the upper longitudinal member to form the machine frame. In the longitudinal direction, the guide is attached to the lower longitudinal member and the upper longitudinal member between the lateral members. The guide is directly and / or indirectly attached to the lower longitudinal member and / or the upper longitudinal member. For example, the guide is indirectly attached to the upper longitudinal member via a screw drive mechanism support. The guide is particularly a linear guide. The guide specifically includes at least two guide units that are longitudinally spaced apart from each other and attached to the lower longitudinal member and the upper longitudinal member. The guide units are directly and / or indirectly attached. Therefore, the guide units are arranged between the lateral members. The lower longitudinal member and / or the upper longitudinal member has a curved shape. The curved shape extends particularly laterally away from the axis of rotation. The lower longitudinal member preferably extends in a curved shape away from the axis of rotation, starting from the rail guide unit. The lateral members and / or the upper longitudinal members correspondingly extend in a curved shape away from the axis of rotation.

[0013] The rail grinding machine according to claim 4 ensures a simple design and very convenient use. The at least one guide unit defines the guide plane and the adjustment direction. The adjustment direction extends particularly parallel to the guide plane. The adjustment direction preferably extends perpendicular to the longitudinal direction and / or the lateral direction. The at least one guide unit is particularly used as a linear guide. The at least one guide unit is arranged on the frame, particularly on the lower longitudinal member and the upper longitudinal member. The at least one guide unit is particularly arranged between two lateral members that connect the lower longitudinal member and the upper longitudinal member to each other. The at least one guide unit is directly and / or indirectly attached to the lower longitudinal member and / or the upper longitudinal member. The guide preferably comprises at least two guide units arranged on the frame in a longitudinally spaced manner. The at least two guide units preferably extend parallel to each other and define the guide plane and the adjustment direction. For example, the central longitudinal axis of the at least two guide units defines the guide plane.

[0014] The rail grinding machine according to claim 5 ensures a simple design and convenient use. The guide member is used to adjust the height of the grinding unit. For this purpose, the grinding unit is arranged on the guide member. The at least one damping element is used to dampen and / or decouple the handle from vibration. Vibrations caused by the grinding and drive motor and transmitted from the grinding unit to the guide member are damped by the at least one damping element, thereby at least partially decoupling from the handle. The at least one damping element is arranged between the guide member and the frame. The at least one damping element is preferably arranged between the guide member and the lower longitudinal member and / or between the guide member and the upper longitudinal member. The guide member is designed, for example, as a guide rod. The guide rod has, for example, a circular, elliptical, or polygonal cross-section. The guide rod may be hollow.

[0015] The rail grinding machine according to claim 6 ensures a simple design and convenient use. Each guide element is arranged between the lower damping element and the upper damping element. The lower damping element and the upper damping element are arranged on the frame. The lower damping element is preferably arranged on the lower longitudinal member, and the upper damping element is arranged on the upper longitudinal member. The lower damping element and / or the upper damping element are directly and / or indirectly attached to the lower longitudinal member and / or the upper longitudinal member. The lower damping element and the upper damping element achieve improved vibration damping and / or vibration decoupling for the handle.

[0016] The rail grinding machine according to claim 7 ensures a simple design and convenient use. Due to the different spring stiffnesses, the damping elements prevent undesirable oscillations in the grinding unit. Due to the different spring stiffnesses, the at least one guide unit specifically functions as both a fixed bearing and a floating bearing. Preferably, the spring stiffness of the lower damping element is greater than that of the upper damping element.

[0017] The rail grinding machine according to claim 8 ensures a simple design and convenient use. The carriage allows for easy attachment of the grinding unit to the guide member and / or simple height adjustment of the grinding unit via a screw drive mechanism. The carriage specifically includes at least one first carriage portion and a second carriage portion, with the grinding unit attached to the first carriage portion and the screw drive mechanism attached to the second carriage portion. The second carriage portion extends transversely to the first carriage portion. The screw drive mechanism is specifically arranged between the carriage (particularly the second carriage portion) and the frame (particularly the upper longitudinal member).

[0018] The rail grinding machine according to claim 9 ensures a simple design and convenient use. The grinding unit and the screw drive mechanism are preferably attached to the carriage. The grinding unit is particularly attached to the first carriage part, while the screw drive mechanism is attached to the second carriage part. The second carriage part particularly extends transversely to the first carriage part. The screw drive mechanism is preferably attached between the carriage (particularly the second carriage part) and the machine frame (particularly the upper longitudinal member). Since the grinding unit and the screw drive mechanism are attached to the carriage independently of each other, the operator has an unobstructed view of the grinding unit (particularly the grinding tool and the associated grinding point).

[0019] The rail grinding machine according to claim 10 ensures a simple design and convenient use. Since the screw axis is spaced apart from the guide plane when viewed in the transverse direction, the screw drive mechanism can be spaced apart from the machine frame. This simplifies the design. The height adjustment device preferably includes a screw drive mechanism bracket attached to the machine frame (particularly the upper longitudinal member), and the screw drive mechanism is mounted on this bracket. The screw nut of the screw drive mechanism is preferably attached to the screw drive mechanism bracket, while the screw of the screw drive mechanism is rotatably mounted on the carriage. The screw drive mechanism particularly includes a handwheel for manual operation. The screw axis is preferably spaced apart from the rotational axis in the transverse direction, particularly in the region of the tool holder. This avoids obstruction of the view of the rail head and the grinding tool.

[0020] The rail grinding machine according to claim 11 ensures a simple design and convenient use. Since the screw axis is located between the guide plane and the rotational axis when viewed in the transverse direction, the screw drive mechanism can be easily attached to the machine frame, and an essentially unobstructed view of the rail head and the grinding tool is achieved. The screw axis is particularly located between the guide plane and the rotational axis in the region of the tool holder. The screw axis particularly extends parallel to the guide plane and / or the rotational axis. The screw axis preferably has a distance B from the guide plane in the transverse direction, where: 1 cm ≤ B < 40 cm, particularly 3 cm ≤ B ≤ 30 cm, particularly 4 cm ≤ B ≤ 20 cm, and particularly 5 cm ≤ B ≤ 10 cm. Particularly: B < A. The screw axis preferably has a distance B from the guide plane in the region of the tool holder.

[0021] The rail grinding machine according to claim 12 ensures a simple design and convenient use. The frame is preferably formed as a machine frame including a lower longitudinal member, an upper longitudinal member, and lateral members. The lateral members connect the lower longitudinal member and the upper longitudinal member. The screw drive mechanism can be attached directly or indirectly to the upper longitudinal member. For example, the screw drive mechanism can be attached to the upper longitudinal member via a screw drive mechanism bracket. Arranging the screw drive mechanism on the upper longitudinal member facilitates precise guidance of the grinding unit. The height adjustment device preferably includes a screw drive mechanism bracket attached to the upper longitudinal member. The screw nut of the screw drive mechanism is attached to the screw drive mechanism bracket, while the screw of the screw drive mechanism is rotatably mounted on the carriage. The screw drive mechanism specifically includes a handwheel for operation.

[0022] The rail grinding machine according to claim 13 ensures a simple design and convenient use. The at least one damping element is specifically used for vibration damping and / or vibration decoupling of the handwheel of the screw drive mechanism. The at least one damping element is, for example, arranged between the carriage and the screw drive mechanism and / or between the screw and the handwheel.

[0023] The rail grinder according to claim 14 ensures a simple design and convenient use. Because the axis of rotation is arranged on the side of the guide plane facing the handle (particularly in the area of ​​the tool holder), the grinding unit is positioned within the intermediate space between the guide plane and the handle. This allows the operator to easily and conveniently move and / or tilt the rail grinder via the handle, while also enabling simple height adjustment and an unrestricted view of the rail head and grinding point.

[0024] The rail grinder according to claim 15 ensures a simple design and convenient use. Because the axis of rotation (particularly in the area of ​​the tool holder) and possibly the screw axis are arranged on the side of the guide plane opposite to the handle, an unrestricted view of the rail head and the grinding point is achieved.

[0025] The rail grinding machine according to claim 16 ensures a simple design and high operational comfort. The two rail guide units are arranged longitudinally spaced apart from each other on the frame. The longitudinal direction is substantially parallel to the longitudinal direction of the rail to be ground. Since the two rail guide units can pivot about the longitudinal axis relative to the frame, different processing positions of the two rail guide units can be set. This particularly improves the flexibility and operational comfort when grinding rails. For example, different rail profiles or rail types, as well as turnout areas, can be ground. Each of the two rail guide units specifically includes a base arranged on the frame in a manner that allows it to pivot about the longitudinal axis.

[0026] The rail grinding machine according to claim 17 ensures a simple design and high operational comfort. Each of the two rail guide units specifically includes a base arranged on the frame in a manner pivotable about a longitudinal axis. The two discs and the guide roller are arranged on their respective bases. The two discs are arranged at an angle to each other and are rotatable about their respective axes. Preferably, each of the two rail guide units includes a guide hook. The guide hook is specifically arranged on the base. The design of the two rail guide units ensures high flexibility and high operational comfort during rail grinding.

[0027] This disclosure is also based on the purpose of creating a method for polishing rails that enables a high level of operational comfort.

[0028] This objective is achieved by a method having the features of claim 18. The advantages of the method according to this disclosure correspond to the advantages of the rail grinder already described according to this disclosure. In particular, the method according to this disclosure can be further improved with any features associated with the rail grinder according to this disclosure. Because the axis of rotation of the grinding unit is arranged spaced apart from the guide plane, a better view of the grinding tool and the grinding point on the rail is achieved. This particularly enables contour grinding of the rail using the grinding tool with a high level of operational comfort via rail head grinding and / or side grinding. Rail grinding, especially contour grinding, is performed by manually moving and tilting the rail grinder on exactly one rail to be ground using the handle. The height adjustment of the grinding unit relative to the frame is performed by the height adjustment device. The grinding tool rotates about the axis of rotation via the tool holder and the drive motor. Attached Figure Description

[0029] Further features, advantages, and details of this disclosure will become apparent from the following description of several exemplary embodiments. In the accompanying drawings:

[0030] Figure 1 A first perspective view of a rail grinding machine according to a first exemplary embodiment is shown, the grinding machine having a height adjustment device and a grinding unit disposed thereon.

[0031] Figure 2 A second perspective view of the rail grinding machine is shown.

[0032] Figure 3 A side view of the rail grinding machine is shown.

[0033] Figure 4 A front view of the rail grinding machine is shown.

[0034] Figure 5 The rail grinding machine is shown along... Figure 3 First section view of the mid-section line VV

[0035] Figure 6 A top view of the rail grinding machine is shown to illustrate the clear field of view.

[0036] Figure 7 It shows along Figure 6 The second cross-sectional view along section line VII-VII illustrates the height adjustment device (grinding unit not shown) of the rail grinding machine.

[0037] Figure 8 A perspective view of a rail grinding machine according to a second exemplary embodiment is shown.

[0038] Figure 9 A perspective view of a rail grinding machine according to a third exemplary embodiment is shown, and

[0039] Figure 10 It shows Figure 9 A top view of a rail grinding machine. Detailed Implementation

[0040] The following reference Figures 1 to 7 A first exemplary embodiment of this disclosure is described. The rail grinder 1 shown in the figure is used to grind the rails 2 of a rail 5. The rail 5 conventionally includes rails 2 and 3, which are fixed to sleepers 4. The rail 5... Figure 4 As shown in the image.

[0041] The rail grinding machine 1 includes a frame 6, two rail guide units 7 and 8 for guiding the rail grinding machine 1 on rails 2, a grinding unit 9, a height adjustment device 10 for adjusting the height of the grinding unit 9 relative to the frame 6, and a handle 11 for manually moving the grinding unit 9 or the rail grinding machine 1.

[0042] The first rail guide unit 7 and the second rail guide unit 8 are arranged on the frame 6 at intervals along the longitudinal direction x. When the rail grinding machine 1 is positioned on the rail 2 in the working position, the longitudinal direction x is substantially parallel to the longitudinal direction of the rail 2. The first rail guide unit 7 and the second rail guide unit 8 are pivotable relative to the frame 6 about the longitudinal axis 12.

[0043] The rail guide units 7 and 8 each include a base 13, which is pivotally mounted on the frame 6 about a longitudinal axis 12. Furthermore, the rail guide units 7 and 8 each include two discs 14 and 15, a guide roller 16, and a guide hook 17. The discs 14 and 15 are arranged at an angle to each other and are rotatable about corresponding axes 18 and 19. The rail guide units 7 and 8 can abut against the rail 2 in different pivoting positions in a conventional manner to perform grinding operations.

[0044] The frame 6 is designed as a machine frame. The frame 6 includes a lower longitudinal member 20, an upper longitudinal member 21, a first lateral member 22, and a second lateral member 23. The first lateral member 22 and the second lateral member 23 are spaced apart from each other in the longitudinal x direction and connect the lower longitudinal member 20 to the upper longitudinal member 21. The lower longitudinal member 20 has a curved shape and extends laterally y away from the longitudinal axis 12, starting from the rail guide units 7, 8. The laterally y direction extends perpendicular to the longitudinal x direction. The lateral members 22, 23 and the upper longitudinal member 21 together form a U-shape and are arranged relative to the rail guide units 7, 8 such that the upper longitudinal member 21 extends laterally y away from the longitudinal axis 12 corresponding to the lower longitudinal member 20.

[0045] The height adjustment device 10 is attached to the frame 6. The height adjustment device 10 includes a guide 24, a carriage 25, a screw drive mechanism support 26, a screw drive mechanism 27, and a damping element 39. The guide 24 is a linear guide. The guide 24 is used to adjust the height of the grinding unit 9 in the adjustment direction z. The adjustment direction z extends perpendicular to the longitudinal x and transverse y directions.

[0046] The guide member 24 includes a first guide unit 28 and a second guide unit 29. Guide units 28 and 29 are spaced apart from each other in the longitudinal direction x and are respectively attached to the lower longitudinal member 20 and the screw drive mechanism support 26, which in turn is attached to the upper longitudinal member 21. The first guide unit 28 includes a first guide element 30, on which a first guide sleeve 31 is displaceably guided. Correspondingly, the second guide unit includes a second guide element 32, on which a second guide sleeve 33 is displaceably guided. Guide elements 30 and 32 are designed as guide rods. Guide elements 30 and 32 are attached to the lower longitudinal member 20 and to the upper longitudinal member 21 via the screw drive mechanism support 26. Guide elements 30 and 32 extend parallel to each other in the adjustment direction z. Correspondingly, guide sleeves 31 and 33 are displaceable in the adjustment direction z between the lower longitudinal member 20 and the upper longitudinal member 21. The guiding elements 30, 32 and the associated guiding sleeves 31, 33 have, for example, a circular cross-section.

[0047] The first guide unit 28 has a first central longitudinal axis M1. Correspondingly, the second guide unit 29 has a second central longitudinal axis M2. The central longitudinal axes M1 and M2 extend parallel to each other in the adjustment direction z. The central longitudinal axes M1 and M2 define the guide plane E of the guide member 24. The longitudinal direction x and the adjustment direction z extend parallel to the guide plane E. The transverse direction y extends perpendicular to the guide plane E and forms a normal vector.

[0048] The carriage 25 is attached to the guide sleeves 31 and 33 and is movable with them in the adjustment direction z. The carriage 25 has a first carriage portion 34 and a second carriage portion 35 extending substantially transversely to the first carriage portion 34. The first carriage portion 34 extends substantially in the longitudinal x and adjustment direction z. In contrast, the second carriage portion 35 extends substantially in the longitudinal x and transverse y directions. A screw drive mechanism support 26 extends substantially parallel to the second carriage portion 35. The screw drive mechanism support 26 is attached to the upper longitudinal member 21. The screw drive mechanism support 26 extends substantially in the longitudinal x and transverse y directions.

[0049] The grinding unit 9 is attached to the height adjustment device 10 and can be moved in the adjustment direction z via the height adjustment device 10. The grinding unit 9 is attached to the first carriage portion 34.

[0050] The screw drive mechanism 27 is used to move the grinding unit 9 in the adjustment direction z. The screw drive mechanism 27 includes a screw nut 36, a screw 37, and a handwheel 38. The screw drive mechanism bracket 26 has a through-hole 40. The screw nut 36 is attached to the screw drive mechanism bracket 26 in a concentric manner with the through-hole 40. The diameter of the through-hole of the screw nut 36 is at most the same as the diameter of the through-hole 40. The screw 37 is screwed into the screw nut 36 and passes through the screw nut 36 and the through-hole 40. The first end 41 of the screw 37 is rotatably connected to the damping element 39. The damping element 39 is fixedly connected to the second carriage part 35. The handwheel 38 is attached to the second end 42 of the screw 37. By rotating the screw 37 around the screw axis 43 with the handwheel 38, the carriage 25 and the grinding unit 9 attached thereto can be lowered in the adjustment direction z, or if the rotation direction is reversed, it can be raised against the adjustment direction z. The damping element 39 is used for vibration damping of the screw drive mechanism 27. The damping element 39 is particularly used for vibration decoupling of the grinding unit 9 and the screw drive mechanism 27.

[0051] The grinding unit 9 includes a drive motor 44, a fuel tank 45, a clutch 46, and a tool holder 47. The drive motor 44 is only shown in Figure 1 , 3 , 4, and 5. The drive motor 44 is designed as an internal combustion engine and is supplied with fuel through the fuel tank 45. The drive motor 44 is connected to the clutch 46, which in turn is connected to the tool holder 47. The tool holder 47 can be driven to rotate around the rotation axis 48 by the drive motor 44. The grinding tool 49 is clamped or attached in or on the tool holder 47. The grinding tool 49 can be driven to rotate around the rotation axis 48 together with the tool holder 47. The tool holder 47 does not intersect the guiding plane E. The tool holder 47 is designed as a flange, for example, and the grinding tool 49 is attached or screwed to the flange. The grinding tool 49 is a grinding wheel, for example. The clutch 46 is used to decouple the drive motor 44 and the tool holder 47 in terms of the peak force acting axially and / or the peak force acting around the rotation axis 48, so that the peak force is damped.

[0052] The rotation axis 48 is spaced apart from the guiding plane E in the lateral direction y. The rotation axis 48 is particularly spaced apart from the guiding plane E in the lateral direction y in the region of the tool holder 47 and the grinding tool 49. This is示例性 shown in Figure 5 . The rotation axis 48 and the longitudinal axis 12 are arranged on the same side of the guiding plane E. Particularly, for the distance A of the rotation axis 48 from the guiding plane E in the lateral direction y, the following relationship applies: 1 cm < A ≤ 40 cm, particularly 3 cm ≤ A ≤ 30 cm, particularly 4 cm ≤ A ≤ 20 cm, and particularly 5 cm ≤ A ≤ 10 cm.

[0053] Viewed in the transverse y-direction, the screw axis 43 is arranged between the guide plane E and the rotation axis 48. Therefore, the screw axis 43 is spaced apart from both the guide plane E and the rotation axis 48 in the transverse y-direction. The screw axis 43 and the rotation axis 48 are arranged on the same side of the guide plane E. The screw axis 43 has a distance B from the guide plane E in the transverse y-direction, wherein the following relationships particularly apply to distance B: 1cm ≤ B < 40cm, especially 3cm ≤ B ≤ 30cm, especially 4cm ≤ B ≤ 20cm, and especially 5cm ≤ B ≤ 10cm. Specifically: B <A。

[0054] Handle 11 is used to manually move the rail grinder 1 along the rail 2 and / or to manually tilt the rail grinder around the rail 2. By moving the rail grinder 1 with the aid of handle 11, the grinding unit 9 for grinding the rail 2 is also manually moved. Handle 11 is arranged on the same side of the guide plane E as the screw axis 43 and the rotation axis 48. Viewed laterally (y-axis), the screw axis 43 and the rotation axis 48 are arranged between the guide plane E and handle 11. Therefore, the screw axis 43 and the rotation axis 48 are arranged on the side of the guide plane E facing handle 11. Grinding unit 9 is arranged in the intermediate space between the guide plane E and handle 11.

[0055] The handle 11 is bow-shaped. The handle 11 includes a lower longitudinal rod 50, an upper longitudinal rod 51, a first lateral rod 52, and a second lateral rod 53. The first lateral rod 52 and the second lateral rod 53 are spaced apart from each other in the longitudinal x-axis and connect the lower longitudinal rod 50 to the upper longitudinal rod 51. The upper longitudinal rod 51 is essentially used as a grip for the operator.

[0056] The handle 11 is attached to the rail guide units 7 and 8 and can pivot together with them about the longitudinal axis 12. Furthermore, the handle 11 can be adjusted relative to the rail guide units 7 and 8 by pivoting and locked in a set pivot position. A foldable bracket 54 is attached to the lower longitudinal rod 50 for holding the rail grinder 1.

[0057] Rail grinding machine 1 operates as follows:

[0058] First, position the rail grinder 1, along with its rail guide units 7 and 8, onto the rail 2 to be ground. Set and lock the rail guide units 7 and 8 to the desired pivot position around the longitudinal axis 12. Drive the grinding tool 49 to rotate around the rotation axis 48 via the drive motor 44. The operator holds the rail grinder 1 via the handle 11.

[0059] The operator can move the grinding tool 49 in the adjustment direction z and feed it to the rail 2 using the handwheel 38. In the position of the rail grinding machine 1 shown in the figure, the rail head 2' of the rail 2 is ground. For rail head grinding, the operator can manually move the rail grinding machine 1 along the rail 2 using the handle 11.

[0060] Because the rotation axis 48 is spaced laterally (y) from the guide plane E in the area of ​​the tool holder 47, the rail grinder 1 forms clear viewing areas S1 and S2, which are arranged longitudinally (x) between the first rail guide unit 7 and the grinding tool 49 or between the second rail guide unit 8 and the grinding tool 49. The clear viewing areas S1 and S2 are particularly defined according to... Figure 6 As shown in the top view. Clear viewing areas S1 and S2 allow the operator to clearly see the rail 2 or rail head 2' to be ground. Clear viewing areas S1 and S2 are also created when the operator tilts the rail grinder 1 toward the frame 6 around the rail 2 to perform side grinding of the rail head 2'. During the grinding operation, the screw drive mechanism 27, used to adjust the height of the grinding unit 9, provides vibration damping via the damping element 39.

[0061] The following reference Figure 8 A second exemplary embodiment of this disclosure is described. Unlike the first exemplary embodiment, the first guide unit 28 additionally includes a lower damping element 55 and an upper damping element 56. The first guide element 30 is attached to the lower longitudinal member 20 via the lower damping element 55 and to the screw drive mechanism support 26 or the upper longitudinal member 21 via the upper damping element 56. Correspondingly, the second guide unit 29 includes a lower damping element 57 and an upper damping element 58. The second guide element 32 is attached to the lower longitudinal member 20 via the lower damping element 57 and to the screw drive mechanism support 26 or the upper longitudinal member 21 via the upper damping element 58. The damping elements 55 to 58 are used to decouple the grinding unit 9 and the handle 11 from vibration. Vibrations acting on the guide member 24 from the grinding unit 9 during grinding operations are damped by the damping elements 55 to 58, thereby reducing vibrations acting on the frame 6 and the handle 11.

[0062] The lower damping elements 55 and 57 each have a first spring stiffness, while the upper damping elements 56 and 58 each have a second spring stiffness. The first spring stiffness differs from the second spring stiffness. The first spring stiffness is particularly greater than the second spring stiffness. This prevents undesirable oscillations from occurring in the height adjustment device 10 or the grinding unit 9 attached thereto. For further design and operation details, refer to the description of the foregoing exemplary embodiments.

[0063] The following reference Figure 9 and 10A third exemplary embodiment of this disclosure is described. Unlike the aforementioned exemplary embodiments, the screw axis 43 and the rotation axis 48 are arranged on the side of the guide plane E opposite to the handle 11. The screw axis 43 and the rotation axis 48 are arranged on the first side of the guide plane E, while the handle 11 is arranged on the second side of the guide plane E. Therefore, compared to the aforementioned exemplary embodiments, the handle 11 is arranged on the other side of the guide plane E. Consequently, the grinding unit 9 is not arranged in the intermediate space between the frame 6 and the handle 11. This also creates clear viewing areas S1 and S2 on the rail head 2' of the rail to be ground. Figure 9 and 10 The drive motor 44 is not shown. For further design and operation of the rail grinding machine 1, please refer to the description of the foregoing exemplary embodiments.

[0064] Generally speaking, the individual features of each exemplary embodiment can be combined in any way.

Claims

1. Rail grinding machine for grinding rails of a track, in particular by manual movement and manual tilting on exactly one rail, the rail grinding machine having - a frame (6), - two rail guiding units (7, 8) for guiding the rail grinding machine (1) on exactly one rail (2), -- wherein the rail guiding units (7, 8) are spaced apart from each other in the longitudinal direction (x), and -- wherein the rail guiding units (7, 8) are arranged on the frame (6), - a grinding unit (9), which comprises a drive motor (44) and a tool holder (47) for driving a grinding tool (49) to rotate about a rotation axis (48), - a height adjustment device (10) for adjusting the height of the grinding unit (9) relative to the frame (6), - a handle (11) for manually moving the grinding unit (9), characterized in that a guide member (24) of the height adjustment device (10) defines a guide plane (E), and the rotation axis (48) is spaced apart from the guide plane (E), particularly in the region of the tool holder (47).

2. The rail grinding machine according to claim 1, characterized in that for the distance A of the rotation axis (48) from the guide plane (E), the following relationship applies: 1 cm < A ≤ 40 cm, particularly 3 cm ≤ A ≤ 30 cm, particularly 4 cm ≤ A ≤ 20 cm, and particularly 5 cm ≤ A ≤ 10 cm.

3. The rail grinding machine according to claim 1 or 2, characterized in that the frame (6) comprises a lower longitudinal member (20) and an upper longitudinal member (21), and the guide member (24) is attached to the lower longitudinal member (20) and the upper longitudinal member (21).

4. The rail grinding machine according to at least one of the preceding claims, characterized in that the guide member (24) comprises at least one guide unit (28, 29) for moving the grinding unit (9) in the adjustment direction (z).

5. The rail grinding machine according to claim 4, characterized in that each of the at least one guide unit (28, 29) comprises a guide element (30, 32) and at least one damping element (55, 56, 57, 58).

6. The rail grinding machine according to claim 4 or 5, characterized in that each of the at least one guide unit (28, 29) comprises a guide element (30, 32), a lower damping element (55, 57) and an upper damping element (56, 58).

7. The rail grinding machine according to claim 6, characterized in that the lower damping element (55, 57) and the upper damping element (56, 58) have different spring stiffnesses.

8. The rail grinding machine according to at least one of the preceding claims, characterized in that the height adjustment device (10) comprises a carriage (25) which is mounted on the guide member (24) so as to be displaceable in the adjustment direction (z).

9. The rail grinding machine according to claim 8, characterized in that... A screw drive mechanism (27) of the height adjustment device (10) and / or the grinding unit (9) are attached to the carriage (25).

10. The rail grinding machine according to at least one of the preceding claims, characterized in that... The height adjustment device (10) includes a screw drive mechanism (27) having a screw axis (43) spaced apart from the guide plane (E) and / or the rotation axis (48), particularly in the region of the tool holder (47).

11. The rail grinding machine according to claim 10, characterized in that... The screw axis (43) is arranged between the guide plane (E) and the rotation axis (48).

12. The rail grinding machine according to claim 10 or 11, characterized in that... The screw drive mechanism (27) is arranged on the upper longitudinal member (21) of the frame (6).

13. The rail grinding machine according to at least one of claims 10 to 12, characterized in that... The height adjustment device (10) includes at least one damping element (39) for vibration damping of the screw drive mechanism (27).

14. The rail grinding machine according to at least one of the preceding claims, characterized in that... The rotation axis (48) and / or the screw axis (43) of the screw drive mechanism (27) are arranged on the side of the guide plane (E) facing the handle (11).

15. Rail grinding machine according to at least one of claims 1 to 13, characterized in that The rotation axis (48) and / or the screw axis (43) of the screw drive mechanism (27) are arranged on the side of the guide plane (E) opposite to the handle (11).

16. The rail grinding machine according to at least one of the preceding claims, characterized in that... The two rail guide units (7, 8) can pivot about the longitudinal axis (12) relative to the frame (6).

17. The rail grinding machine according to at least one of the preceding claims, characterized in that... The two rail guide units (7, 8) each include two discs (14, 15) and a guide roller (16).

18. A method for grinding rails, comprising the following steps: - Provides a rail grinding machine (1) according to at least one of the preceding claims, - Position the rail grinding machine (1) together with the two rail guide units (7,8) on the rail (2) to be ground, and - The grinding unit (9) is manually moved by means of the handle (11), and in particular the rail grinding machine (1) is manually moved and tilted by means of the handle (11).

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