WO2021068997A1

WO2021068997A1 - Rail drilling device

Info

Publication number: WO2021068997A1
Application number: PCT/CZ2020/050074
Authority: WO
Inventors: Lukáš Dorica
Original assignee: DD PNEU s.r.o.
Priority date: 2019-10-07
Filing date: 2020-10-06
Publication date: 2021-04-15

Abstract

Rail drilling device (1) consisting of a housing (2), a carriage (3), a clamping mechanism of the drill, a movable clamping arm (5) and a clamping arm control mechanism (7). The carriage (3) is provided with a delimiting clamp (4) and the movable clamping arm (5) is provided with a fixing clamp (6). The carriage (3) and the housing (2) are connected by means of a fixed connection by connecting the underside (11) of the housing (2) to one end of the carriage (3). At the other end, the carriage (3) is provided with a hole (8) for the passage of a drill bit of the drill to the rail. The delimiting clamp (4) consists of at least one pair of delimiting jaws (9) which are provided with teeth (10) on their outer circumference. The clamping mechanism of the drill is a holder (29) mounted on the carriage (3).

Description

Rail drilling device

Field of the Invention

Rail drilling device relates to the area of construction and maintenance of transport infrastmctur. This is especially the area of construction and maintenance of tracks of, urban, suburban, national and international rail transport.

Background of the Invention

Construction and maintenance of railway tracks and superstructures are among the physically demanding works, as they take place under any weather conditions. While construction of railway tracks at the very beginning relied mainly on the manual physical work of workers who had to carry heavy parts to the place of laying from the storage areas on their shoulders or with the use of simple transport trucks, railway crane devices are used for this hard work today, to the extent that such is possible from a space viewpoint.

One of the most demanding technological processes of production and design of equipment for rail maintenance is the effort to achieve the accuracy of compatibility of used jigs and tools in relation to the rail profile. This gives the possibility of presetting the accuracy of the mounting, i.e. the possibility to clamp the jig quickly and easily and perform the planned action without the need for further calibration of the mounting. This makes it possible to speed up the actual work operation in traffic and thus reduce the necessary line downtimes. However, this task is not easy due to the considerable variability of the profiles of the rails used within the railway tracks in the Czech Republic and in the world. Although there are only two types of rails, namely 49 El and UIC 60, used currently on the new railway tracks, train tracks are historically fitted with more than 33 types of rail profiles all over the world. These profiles are designed only for train tracks that use non-grooved rails consisting of a foot, web and head. On the other hand, tramway tracks are usually fitted with grooved rails and non-grooved rails are only exceptionally used for sections where there is no simultaneous use by road means. In the Czech Republic, it can be said that every city has a different profile of tramway rails.

In the area of assembly accuracy, the requirements for the accuracy of work are escalating especially with the construction of high-speed lines, where possible above-limit vibrations or assembly inaccuracies would have far-reaching consequences and there would be a risk of derailment of railway sets. Likewise, the refinement of activities and their automation is a necessary condition for accelerating repairs in normal operation, thus eliminating traffic restrictions.

In the field of drilling holes in rails, simple methods are known where a lead-in hole is made by means of a centre punch for mounting a drill to create a functional hole. The surface of the rails is relatively hard, as it carries considerable weights of sets, and therefore the machining and locksmith work performed on the rail is demanding. Therefore, a variety of techniques are often used, which replace manual relatively inaccurate work with mechanical work, where the use of adjusting jigs and electrically, motor, pneumatically or hydraulically driven tools makes the work physically easier and, above all, mechanically more precise.

A ROBEL device is known as a Rail Drill 10.20 operating on the principle of a cordless electric drill, with a coolant supply, with manual pressurization, which allows the device to be mounted on a rail using a built-in holder and a rail to be drilled using a lever mechanism. Although the device is relatively simple to operate and does not require any special machine accessories, such as an auxiliary drive, etc., its main disadvantage is the weight of the non- detachable compact unit thus constructed, which places great physical demands on the operator. Another disadvantage is the versatility of clamping chucks, which are not specially shape-profiled. This makes it always necessary to manually adjust the position of the drilling hole before drilling.

The task of the present invention is to eliminate the shortcomings of known devices and to create a rail drilling device which will enable fast clamping of rail drilling device on rails of various shapes and types, so that clamping of the device will be possible on both train and tramway rails used, according to the approved standards, on train and tramway trackc in the Czech Republic and elsewhere in the world. The jaws used must correspond in shape to the profile of the rails used, so that clamping of the whole device is quick and precise, but at the same time the jaws must be replaceable so that the device can be fitted to all types of standard rails after simple adjustment. The device must allow the creation of spatially accurate transverse horizontal holes in the rail webs and vertical drainage holes in the groove in the rail head, while maintaining the accuracy of drilling and positioning of the holes. When the device is strongly mounted on a rail, the device must be able to select the location of the drilled holes using gauges and feeds.

Summary of the invention

The disadvantages of the background art are overcome by a device according to the invention, rail drilling device consisting of a housing, a carriage, a clamping mechanism of the drill, a movable clamping arm and a clamping arm control mechanism. In this embodiment of the invention, the carriage is provided with a delimiting clamp and the movable clamping arm is provided with a fixing clamp. The delimiting clamp and the fixing clamp serve in the clamped condition for stable fixing of the device on the rail. The carriage and the housing are connected by means of a fixed connection by connecting the underside of the housing to one end of the carriage. At the other end, the carriage is provided with a hole for the passage of a drill bit of the drill to the rail. In this embodiment of the invention, the delimiting clamp consists of at least one pair of delimiting jaws which are provided with teeth on their outer circumference. The clamping mechanism of the drill is a holder mounted on the carriage on the side opposite to the side on which the carriage is attached to the housing. The holder is always positioned so as not to cover the drill bit hole in the carriage.

In a preferred embodiment, the holder of the drill consists of a flat permanent magnet provided with fixing stops on three sides. These stops define the position of the drill after it has been set in the holder. In another preferred embodiment, the carriage consists of a moving bed mounted in the carriage. The moving bed has the possibility of sliding movement, in a vertical direction derived from the position of the device fixed in the working position, i.e. set on the rail. The moving bed is adapted for removable clamping of the drill. In this embodiment of the technical solution, the hole in the carriage, for the passage of the drill bit of the drill to the rail, is oval in shape and as large so as not to restrict the work and position of the drill bit when moving the drill mounted in the moving bed.

In another preferred embodiment, the carriage is further provided with side overlaps with vertical guide grooves. A moving bed is slidably mounted in these guide grooves and the upper end of the overlaps forms the lateral delimitation of the mounting of the drill. The carriage is also equipped with a length gauge for accurate measurement of the displacement of the moving bed.

In the following preferred embodiment, the moving bed is provided with a side holder with a screw guide and a locking screw for shifting the moving bed. The locking screw is used to set the selected height position of the drill in the clamped device and to lock this position.

In another preferred embodiment, the moving bed is provided with a rear stop for a position- precise delimitation of the lower end position of the drill in the working position of the device mounted on the rail. This results in a precise three-sided fixation of the drill on the moving bed by means of a rear stop and lateral overlaps of the carriage, which prevents the drill from moving downwards and sideways in the working position of the device.

In the following preferred embodiment, the moving bed is made of a magnetic material or is provided with the elements made of a magnetic material. This makes it possible to further improve the accuracy and strength of the clamping of the drill on the device in case the drill is provided with a holder or its own surface made of a magnetic material or with the elements made of a magnetic material. In another preferred embodiment, the locking screw is pivoted on the one side in the anchoring cavity of the housing and is provided on the other side with a head for easier manual gripping and rotation of the locking screw.

In another preferred embodiment, the delimiting jaws are interchangeably anchored from two opposite sides on the carriage in the area of the location of the hole. This mounting option preferably takes advantage of the reduction of oscillations and vibrations generated during drilling by the fact that the oscillation arm is practically zero or very small. For position- precise clamping of each delimiting jaw on the carriage, the carriage is provided with at least two locking pins on both sides. For detachable fastening of the delimiting jaws to the carriage, the carriage is provided on both sides with at least one threaded hole for an anchor bolt passing through the delimiting jaw.

In the following preferred embodiment, each delimiting jaw is thus provided with at least three functional holes for mounting them on the carriage, i.e. at least with a pair of locking holes for engaging the locking pins and also with an opening for the passage of the fixing bolt through the delimiting jaw.

In another preferred embodiment, the delimiting jaws have a shape of a dish with a pair of protruding comer teeth. One corner tooth corresponds in shape to the rounded profile of the transition of the rail web and head, and the other corner tooth corresponds in shape to the rounded profile of the transition of the rail web and foot. The shape and spacing of the teeth make it possible to precisely position the delimiting jaws in the side profile of the rail without the potential for lateral deviation.

In another preferred embodiment, the delimiting jaws are rotatably and lockably fixed to the carriage. To make it easier to define the location of the drilled hole in the rail, the delimiting jaws are provided on their outer circumference with teeth, the spacings and heights of which are adapted to different types of rails. In the following preferred embodiment, the movable clamping arm consists of a lever mechanism rotatably mounted on an anchoring pin in a housing. At one end, extending outside the housing, the movable clamping arm is provided with a bush. This bush is fitted with a fixing screw pin carrying fixing jaws. At the other end, placed inside the housing, the movable clamping arm is provided with an internally threaded carrier. At the same time, the carrier is mounted on the outer screw thread of the motion shaft of the control mechanism. The motion shaft is pivoted in the housing in two points. The motion shaft is driven by a mechanical two-arm lever, which is positioned outside the housing. In this preferred embodiment, the fixing clamp consist of a pair of fixing jaws. These are mounted on a fixing screw pin. The fixing jaws are connected to one another by a pair of rotation limiters, which define the bearing surfaces of the fixing jaws, which bear on the inner side profile of the rail.

In another preferred embodiment, the rail drilling device further comprises a horizontal holder for horizontal mounting of the drill. This mounting allows vertical drilling operations to be performed in the area of the rail head. This allows the device with the drill to be used for drilling drainage holes in the groove of the rail head. The horizontal holder is arranged on the side of the device, i.e. on the side of the housing. The horizontal holder is clamped to the housing firmly or detachably by its clamping part, which is perpendicular to the support platform of the horizontal holder. The support platform then makes an angle of 90° with the carriage and at the same time extends beyond the contour of the side profile of the housing with the carriage. In this preferred embodiment, similarly to the moving bed, the horizontal holder is preferably made of a magnetic material or is provided with the elements made of a magnetic material. If the drill is provided with a holder or its own surface made of a magnetic material or with the elements made of a magnetic material, this embodiment of the horizontal holder allows firm but detachable fixation of the drill on the horizontal holder, in the absence of other functional stops.

In another preferred embodiment, the carriage is provided with a lever locking forming another locking element of the device preventing the moving bed with the drill clamped from moving. In addition, the housing of the device is fitted with an optical gauge, which serves as a basic optical gauge when mounting the device on a rail. The main advantage of the invention is the creation of a rail drilling device, which enables fast clamping of the rail drilling device on rails of various shapes and types. Clamping of the device is possible on both train and tramway rails. The used delimiting jaws correspond in shape to the side profile of the used rails, making the clamping fast and spatially accurate. The device allows the creation of spatially accurate transverse horizontal holes in the rail webs and vertical drainage holes in the groove in the rail head, while maintaining the accuracy of drilling and positioning of the holes.

Explanation of drawings

The invention will be explained in detail by drawings which illustrate:

Fig. 1 a cross-sectional side view of the rail drilling device with the holder fitted with a drill and and delimiting jaws in an exchangeable rotatable embodiment, the device being mounted on a rail;

Fig. 2 a side view from the right of the rail drilling device with a holder and delimiting jaws in an exchangeable rotatable design;

Fig. 3 a cross section of the fixing clamp;

Fig. 4 a cross-sectional view of a delimiting clamp with delimiting jaws in an exchangeable rotatable design;

Fig. 5 a perspective view from below of the rail drilling device with a holder and delimiting jaws in an exchangeable rotatable design;

Fig. 6 a cross-sectional side view of the rail drilling device with open clamps in a design with a holder and delimiting jaws in an exchangeable rotatable design;

Fig. 7 a perspective view of the rail drilling device in a design with a moving bed, cup-shaped delimiting jaws and a horizontal holder;

Fig. 8 a perspective view of the rail drilling device in the design with a moving bed, cup-shaped delimiting jaws and a horizontal holder. The view is from the side opposite to the mounting with the horizontal holder; Fig. 9 a perspective view of the rail drilling device in the design with a moving bed, cup-shaped delimiting jaws and a horizontal holder. The view is fitted with a horizontal holder from the side.

Examples of the embodiments of the invention

According to exemplary embodiment of the invention shown in Figs 1, 2, 5 to 9, the rail drilling device 1 is a clamping jig which is fastened on both sides to the side profile of the rail web. The device 1 thus forms a detachable but sufficiently firmly fixable support on the rail for clamping the drill before drilling holes and grooves into the rail head and web in the “x” and “y” axes, according to the Cartesian coordinate system.

According to embodiment of the invention shown in Figs 1, 2, 5 to 9, the rail drilling device 1 consists of a housing 2 and a carriage 3 provided with a delimiting clamp 4. Furthermore, the rail drilling device 1 also consists of a clamping mechanism of a dril and a movable clamping arm 5 provided with a fixing clamp 6, for stable fixing of the rail drilling device 1 on the rail. One end of the movable clamping arm 5 is placed in the housing 2 and the other end is outside the housing 2. The control of the movable clamping arm 5 is a lever-type control and is provided by a control mechanism 7, whose control part is placed in the housing 2. The fixing clamp 6 of the clamping arm 5 is designed as a pair of separate dish-shaped thrust segments, adapted to prevent contact of the fixing clamp 6 with the drill bit after its passage through the rail web. At the same time, the main and strongest point of mounting the device 1 on the rail is the space around the horizontal drilled hole. The clamping effect of the fixing clamp 6 is thus a purely thrust effect and the shape of the fixing clamp 6 is not defined to the shape of the rail.

According to embodiment of the invention shown in Figs 1, 2, 5 and 6, the carriage 3 is fixed at one end to the underside 11 of the housing 2 and is provided at the other end with a hole 8 through which the drill bit of the drill passes towards the rail in the phase of drilling. The carriage 3 with the housing 2 forms the shape of the letter “L”. The delimiting clamp 4 according to this exemplary embodiment of the invention consists of at least one pair of delimiting jaws 9, which are provided with teeth 10 on their outer circumference. The clamping mechanism of the drill consists of a holder 29 mounted on the carriage 3 on the side opposite to the side on which the carriage 3 is attached to the housing 2. The holder 29 is always positioned so as not to cover the drill bit hole 8 in the carriage 3.

As shown in Figs 1, 2, 5 and 6, the holder 29 of the dril consists of a flat permanent magnet provided with fixing stops 30 on three sides. These fixing stops 30 define the exact and fixed position of the drill after setting it in the holder 29 of the rail drilling device 1 and together with the shape of the teeth 10 of the delimiting jaws 9 thus determine the exact position of the future hole to be drilled in the rail.

According to embodiment of the invention shown in Figs 7 to 9, the holder 29 is formed by a moving bed _13 mounted in the carriage 3 with the possibility of sliding movement in the vertical direction. Vertical direction means a direction of movement of the moving bed 13 when the rail drilling device 1 is clamped in the working position, i.e. the rail drilling device 1 set on the rail. The function of the moving bed _13 is to allow the drill to be mounted and supported, and the moving bed _13 is adapted for this function. The hole 8 in the carriage 3 is large and long enough to allow the passage of the drill bit from the drill to the rail in all possible positions of movement of the moving bed _13 on the carriage 3.

According to embodiment of the invention shown in Figs 7 to 9, the carriage 3 is further provided with side overlaps 12 with vertical guide grooves 14. A moving bed _13 is slidably mounted in these guide grooves 14. The carriage 3 is also provided with a length gauge 28, which serves for reading the value of the displacement of the moving bed _13 along the carriage 3. According to one exemplary embodiment of the invention, the gauge 28 can be provided, in addition to a millimetre ruler, with precisely marked displacement values, corresponding to the commonly used positions of the transverse holes in the rails.

According to embodiment of the invention shown in Figs. 7 to 9, the moving bed _13 is provided with a side holder 15. The side holder 15 is used to move the moving bed _13 and, for this purpose, is provided with a screw guide 16 with a locking screw 17. Rotational movement of the locking screw 17 performs the physical extension and retraction of the moving bed _13 as well as its locking in the selected set position.

According to embodiment of the invention shown in Figs. 7 and 8, the moving bed _13 is provided with a rear stop 22 for position-precise definition of the lower position of the drill on the moving bed IT The rear stop 22 and the side overlaps 12 of the carriage 3 make it possible to fix the drill from three sides against unintentional movement in the moving bed 13. For a higher fixation effect and to prevent possible displacement of the drill during work, according to another embodiment of the invention the moving bed 13 is further provided with the elements made of a magnetic material or is directly constructed of ferromagnetic material, thus allowing magnetic clamping of the drill. To increase the strength of the magnetic clamping, it is advisable to use strong, especially neodymium magnets.

According to another embodiment of the invention shown in Figs. 8 and 9, the locking screw 17 is pivoted on the one side in the anchoring cavity 18 of the housing 2 and is provided on the other side with a wheel-shaped head 19, with the size and shape facilitating manual rotation of the locking screw 17.

According to another embodiment of the invention shown in Figs. 1, 2, 4 to 9, the delimiting jaws 9 are anchored in an exchangeable manner from two opposite sides on the carriage 3. The position of the delimiting jaws 9, when clamped on the rail, is chosen in the area of the location of the hole 8 for greater strength and accuracy of the drilling operation, similarly as in the case of the fixing clamps 6. The fastening of the delimiting jaws 9 on the carriage 3 is performed in a screw-type or other manner known to the person skilled in the field. The exact clamping position of each delimiting jaw 9 on the carriage 3 is defined by a pair of locking pins 20 placed on the carriage 3 and fitting into the locking holes 31 on the delimiting jaws 9. According to the exemplary embodiment of the invention shown in Fig. 4, the carriage 3 is provided with a threaded hole and the anchoring of the delimiting jaw 9 is achieved by a fixing bolt 25, which passes through a hole in the delimiting jaw 9 and firmly anchors the delimiting jaw 9 to the support 3 by tightening it. According to embodiment of the invention shown in Figs. 7 to 9, the delimiting jaws 9 have a shape of a dish with a pair of teeth 10. One of these teeth 10 corresponds in shape to the rounded profile of the transition of the rail web and head. The second of the teeth 10 corresponds in shape to the rounded profile of the transition of the rail web and foot. At the same time, the spacing between the teeth U) is such that it spatially forms the delimiting jaws 9 on one side of the rail, shape-defining the space for clamping the rail drilling device 1 between the rail head, web and feet. This prevents the rail drilling device 1 from being clamped arbitrarily in the vertical direction and the precise working position of the rail drilling device 1 on the rail being defined. After this position definition, the clamping arm 5 performs only a force fixation of the rail drilling device 1 by means of the fixing clamp 6 by thrust applied from the opposite side of the rail, by pressure on the rail web. According to a non-illustrated exemplary embodiment of the invention, the delimiting jaws 9 can also achieve other shape and dimensional parameters, corresponding to the variability of the shapes and dimensions of the used railway and tramway rails, i.e. side inner profiles of these rails.

According to embodiment of the invention shown in Figs. 1, 2, 4, 5 and 6, the delimiting clamp 4 consists of at least one pair of delimiting jaws 9 which are rotatably and lockably fixed to the carriage 3 by means of a pair of fixing bolts 25. The delimiting clamp 4 designed in this way of the solution results from the need to ensure the passage of the drill bit through the delimiting clamp 4. To make it easier to define the location of the drilled hole in the rail, the delimiting jaws 9 are provided on their outer circumference with teeth 10, the spacings and heights of which are adapted to different types of rails. When the correct type of tooth 10 is selected according to the type of rail, the position of the drill and thus of the drilled hole is precisely defined after the rail drilling device 1 has been fitted and attached to the rail. After fitting and tightening the rail drilling device 1 and inserting the drill into the rail drilling device 1, it is no longer necessary to make further dimensional adjustments of the drilling axis relative to the rail. According to one embodiment of the invention, this is the profile adaptation of the teeth 10 of one set of delimiting jaws 9 to the rails of the type designations S49, R65 and UIC60. In another exemplary embodiment of the invention, the delimiting jaws 9 may comprise teeth 10, the spacings and heights of which are adapted to other types of rails manufactured and supplied as standard.

According to embodiment of the invention shown in Fig. 6, the movable clamping arm 5 is a lever mechanism rotatably mounted on an anchoring pin 32 in a housing 2. At one end, the clamping arm 5 extends outside the housing 2 and is provided at this end with a bush 33. According to Figs. 3 and 6, this bush 33 is fitted with a fixing screw pin 34 which carries the fixing clamp 6. At the other end, placed inside the housing 2, the movable clamping arm 5 is provided with an internally threaded carrier 35. At the same time, the carrier 35 is mounted on the outer screw thread of the motion shaft 36 of the control mechanism 7. The motion shaft 36 is pivoted in the housing 2 in two points. The motion shaft 36 is driven by a mechanical two- arm lever 37, which is positioned outside the housing 2. When the motion shaft 36 is rotated by means of the two-arm lever 37, the carrier 35 is moved in the direction given by the rotation of the thread of the motion shaft 36, thus bringing closer or further away the movable clamping arm 5 in relation to the rail. According to the same exemplary embodiment of the invention shown in Fig. 3, the fixing clamp 6 consists of a pair of fixing jaws 38. The fixing jaws 38 are mounted on a fixing screw pin 34. As shown in Fig. 6, the fixing jaws 38 are connected to one another by a pair of rotation limiters 39, which define the correct bearing of the bearing surfaces 40 of the fixing jaws 38 on the side profile of the rail.

According to embodiment of the invention shown in Fig. 7 to 9, the rail drilling device 1 also comprises a horizontal holder 23. This horizontal holder 23 serves for the horizontal mounting of the drill for drilling vertical holes, i.e. for drilling drainage holes in the groove of the rail head. The horizontal holder 23 is arranged on the side of the housing 2 and is clamped to the housing 2 by means of its clamping part 26. The clamping part 26 is perpendicular to the support platform 27 of the horizontal holder 23. The support platform 27 makes an angle of 90° with the carriage 3 and extends beyond the contour of the side profile of the housing 2 with the carriage 3. The horizontal holder 23 thus has the shape of a side square, while its anchoring to the housing 2 can be removable, using screws, or fixed, for example by means of rivets. The connection can also be made in another way or by means of other fasteners which are not part of the exemplary embodiments shown. The drill is always fixed in the horizontal holder 23 with the drilling head towards the centre of the rail drilling device 1 and the horizontal holder 23 is provided with a cut-out to allow the drill bit to pass from the drill to the rail head. According to the same exemplary embodiment of the invention, the horizontal holder 23 is provided with magnetic elements or made of a magnetic material. This makes it possible to use magnetic forces to create a sufficiently strong, stable, but yet detachable connection of the rail drilling device 1 and the drill in the case that the drill is provided with a holder or surface with magnetic elements or made of a magnetic material. Strong magnets, in particular neodymium magnets, are here preferably used to increase the strength of the magnetic clamping, mainly due to the absence of another way of mounting the drill on the horizontal holder 23. According to another non-illustrated embodiment of the invention, another clamping system well known to the person skilled in the field can be used to clamp the drill to the horizontal holder 23.

According to embodiment of the invention shown in Fig. 7 and 8, the carriage 3 is provided with a lever locking 21 forming another locking element of the rail drilling device 1 preventing the moving bed _13 with the drill clamped from moving. In addition, the housing 2 of the rail drilling device 1 is fitted with an optical gauge 24, which serves as a basic optical gauge when mounting the rail drilling device 1 on a rail.

Industrial applicability

The rail drilling device will find its application in the transport industry in the construction, repair and maintenance of railway and tramway tracks. The device enables quick and precise drilling of functional holes through the side profile of the rail, as well as its feet.

Overview of the Positions

1 rail drilling device

2 housing

3 carriage

4 delimiting clamp

5 clamping arm

6 fixing clamp

7 control mechanism

8 drill bit hole

9 delimiting jaw

10 delimiting jaw tooth 11 underside of the housing 12 lateral overlap of the carriage

13 moving bed

14 guide groove

15 side holder of the bed

16 screw guide

17 locking screw

18 anchoring cavity for the locking screw

19 locking screw head

20 locking pin 21 lever locking 22 rear stop of the moving bed

23 horizontal holder

24 optical gauge

25 fixing bolt

26 clamping part of the horizontal holder

27 support platform of the horizontal holder

28 gauge

29 holder

30 fixing stop

31 locking hole

32 anchoring pin

33 bush

34 fixing screw pin

35 carrier

36 motio shaft

37 two-arm lever

38 fixing jaw

39 rotation limiter

40 bearing surface

Claims

PATENT CLAIMS

1. Rail drilling device (1) consisting of a housing (2), a carriage (3) provided with a delimiting clamp (4), a clamping mechanism of a drill, a movable clamping arm (5) provided with a fixing clamp (6) and a control mechanism (7) of the clamping arm (5) for stable fixing of the device (1) on a rail, characterized in that the carriage (3) is fixed at one end to an underside (11) of the housing (2) and provided at the other end with a hole (8) for passage of a drill bit of the drill to the rail, wherein the delimiting clamp (4) consists of at least one pair of delimiting jaws (9) provided on their outer circumference with teeth (10), the clamping mechanism of the drill consists of a holder (29), the holder (29) is mounted on the carriage (3) from the side opposite to the mounting of the carriage (3) to the housing (2), in the area outside the location of the hole (8).

2. The device according to claim 1, characterized in that the holder (29) consists of a flat permanent magnet provided on three sides with fixing stops (30) for defining the position of the drill.

3. The device according to claim 1, characterized in that the holder (29) consists of a moving bed (13) mounted in the carriage (3) with the possibility of sliding movement in the vertical direction in the working position of the device set on the rail, wherein the moving bed (13) is adapted to clamp the drill.

4. The device according to claim 3, characterized in that the carriage (3) is further provided with side overlaps (12) provided with vertical guide grooves (14), in which the moving bed (13) is slidably mounted, and the carriage (3) is further provided with a gauge (28) for accurate measurement of the displacement of the moving bed (13).

5. The device according to claim 3 or 4, characterized in that the moving bed (13) is provided with a side holder (15) provided with a screw guide (16), and further is provided with a locking screw (17) for moving the moving bed (13) with a possibility of locking it in a selected position.

6. The device according to any of claims 3 through 5, characterized in that the moving bed (13) is further provided with a rear stop (22) for precise positioning of the drill in the moving bed (13).

7. The device according to any of claims 3 trough 6, characterized in that the moving bed (13) is made of a magnetic material or is provided with the elements made of a magnetic material allowing magnetic clamping of the drill.

8. The device according to claim 5, characterized in that the locking screw (17) is pivoted on one side in an anchoring cavity (18) of the housing (2) and on the other side is provided with a head (19) for easier manual rotation of the locking screw (17).

9. The device according to claim 1, characterized in that the delimiting jaws (9) are anchored in an exchangeable manner from two opposite sides on the carriage (3) in the area of the location of the hole (8) for the passage of the drill bit, wherein the carriage (3) is provided with a pair of locking pins (20) for clamping each delimiting jaw (9) and the carriage (3) is further provided with a threaded hole for a fixing bolt (25).

10. The device according to claim 9, characterized in that the delimiting jaws (9) are provided with locking holes (31) for fitting locking pins (20) and a hole for passage and securing the delimiting jaws (9) with the fixing bolt (25).

11. The device according to any of claims 9 through 10, characterized in that the delimiting jaws (9) have a shape of a dish with a pair of teeth (10), with one tooth (10) corresponding in shape to the rounded profile of the transition of the rail web and head, and the other tooth (10) corresponding in shape to the rounded profile of the transition of the rail web and foot, for precise anchoring of the delimiting jaw (9) in the rail.

12. The device according to any of claims 9 through 10, characterized in that the delimiting jaws (9) are rotatably and lockably fixed to the carriage (3), wherein the delimiting jaws (9) are provided on their outer circumference with teeth (10) which are complementary in shape to the outer side profiles of different types of rails.

13. The device according to claim 1, characterized in that the movable clamping arm (5) is a lever mechanism rotatably mounted on an anchoring pin (32) in a housing (2), the lever mechanism is at one end extending outside the housing (2) and is provided with a bush (33) for fitting with a fixing screw pin (34) carrying the fixing clamp (6), the lever mechanism is at the other end placed inside the housing (2), is provided with an internally threaded carrier (35), wherein the carrier (35) is simultaneously mounted on the outer screw thread of a motion shaft (36) of the control mechanism (7), and the motion shaft (36) is pivoted in the housing (2) in two points, wherein the motion shaft (36) is driven by a mechanical two-arm lever (37) positioned outside the housing (2), and further that the fixing clamp (6) consists of a pair of fixing jaw (38) mounted on a fixing screw pin (34), wherein the fixing jaws (38) are connected to each other by a pair of rotation limiters (39), for defining a bearing surfaces (40) of the fixing jaws; (38) bearing on the inner side of a profile of the rail.

14. The device according to any of claims 1 through 13, characterized in that further consists of a horizontal holder (23) for horizontal mounting of the drill for drilling drainage holes in a groove of the rail head, the horizontal holder (23) is arranged on the side of the housing (2), the horizontal holder (23) consisting of a support platform (27) and a clamping part (26) wherein the horizontal holder (23) is clamped to the housing (2) by means of clamping part (26), which is perpendicular to a support platform (27), wherein the support platform (27) creates an angle of 90° with the carriage (3) and extends beyond the contour of the side profile of the housing (2) with the carriage (3), wherein the horizontal holder (23) is made of a magnetic material or is provided with the elements made of a magnetic material allowing magnetic clamping of the drill.

15. The device according to claim 3, characterized in that the carriage (3) is provided with a lever locking (21) for fixing the moving bed (13), and the housing (2) is fitted with an optical gauge (24) for basic optical positioning of the device (1) on the rail.