EP0626480A1 - Support et raccord pour perceuse portable pour rails - Google Patents

Support et raccord pour perceuse portable pour rails Download PDF

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Publication number
EP0626480A1
EP0626480A1 EP94830078A EP94830078A EP0626480A1 EP 0626480 A1 EP0626480 A1 EP 0626480A1 EP 94830078 A EP94830078 A EP 94830078A EP 94830078 A EP94830078 A EP 94830078A EP 0626480 A1 EP0626480 A1 EP 0626480A1
Authority
EP
European Patent Office
Prior art keywords
drill
guide bars
jaw
rail
vice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94830078A
Other languages
German (de)
English (en)
Inventor
Gastone Biffoli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GASTONE BIFFOLI Srl
Original Assignee
GASTONE BIFFOLI Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from ITRM930189A external-priority patent/IT1261431B/it
Priority claimed from ITRM940007 external-priority patent/IT233076Y1/it
Application filed by GASTONE BIFFOLI Srl filed Critical GASTONE BIFFOLI Srl
Publication of EP0626480A1 publication Critical patent/EP0626480A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
    • E01B31/02—Working rail or other metal track components on the spot
    • E01B31/06—Making holes, e.g. by drilling, punching, flame-cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0057—Devices for securing hand tools to the work
    • B25H1/0064—Stands attached to the workpiece

Definitions

  • the invention relates to a support and coupling structure for a portable drill for railway tracks.
  • the mechanisation process of maintenance work in the railway sector has advanced particularly in the field of small machines for work on tracks, such as drills, borers and saws, but there is still much room for improvement.
  • small machines for work on tracks such as drills, borers and saws
  • Motor-driven drills are used for this task, usually having electric, pneumatic or internal-combustion motors, with gear reducers, and support and coupling structures are necessary for coupling the assembly to the track.
  • Drawbacks of this kind of structure are that they are heavy and massive and therefore difficult to transport, as well as slow and laborious to install and remove on and from the track. Further, the coupling of the structure to the track is unstable, creating difficulties with regard to accuracy of desired bore height and direction.
  • Electric drills are usually preferable since they are lighter than internal combustion drills, but obviously where there is no available current link-up they cannot be used, and it becomes necessary to use an internal-combustion motor drill, heavier and more massive than the former type and requiring correspondingly larger and stronger support and coupling structures.
  • the poor precision of these drills is caused by insufficiently strong and stable blocking devices, which devices are rendered even less efficient by the amount of time required to block and unblock them through the use of small handwheels manoeuvring jacks and rods on various parts of the rail, not forgetting the need to reposition and reblock the entire support structure in order to bore holes that are even very close together.
  • the total weight of the drill and its support structure constitutes a considerable drawback. Since often the drill or other machine tool has to be carried by hand, if there is also a massive support structure to carry at least two operatives will be needed, causing once more considerable waste of time and manpower. Furthermore, in cases where a drill or other machine is used on working lines, it may become necessary for operatives urgently to evacuate the workplace in order to let trains or trams pass: massive and unwieldy machine tools and structures impede this urgency, with obvious risks of safety to man, machine and rolling stock.
  • the present invention aims to obviate the above-mentioned drawbacks by providing a support structure which is especially but not exclusively suitable for operations involving the use of a drill driven by an internal combustion motor, but extending to millers, saws and other portable machine tools, the structure being of a small weight and mass and being sufficiently rigid for carrying out its functions, easily dismountable into constituent parts and thus easily transportable, the structure also enabling holes to be drilled at various heights, both on the web of the rail and on horizontal parts of the superstructure, such as switch plates and sleepers.
  • the invention solves the problem of providing a support and coupling structure for a portable drill for railway tracks, of the type comprising a pair of parallel cylindrical guide bars for the forwards and backwards movement of the drill, and consequently of the bit and chuck of the drill, which are parallel to the guide bars, a blocking device for blocking the parallel guide bars to a rail, a drill support device and manoeuvring means for the movement of the bar pair guide, which is characterised in that:
  • 1 indicates a pair of parallel cylindrical guide bars of a drill 2, shown only in outline.
  • 3 and 3' denote a vice for blocking the parallel guide bars 1 to a flanged rail 4 for railways or tramways, while 5 denotes a drill support device and 6 manoeuvring means of the drill support device 5 on the guide bars 1.
  • the vice 3, 3' is associated to the guide bars 1 in proximity of their ends in two different variations, as will be more fully described hereinafter.
  • the vice 3, 3' comprises a pair of jaws 7, 8 which couple to the rail 4.
  • the jaw 7 of the vice 3 has a horizontally-developing central body 70 fixed laterally between the guide bars 1 and resting on the rolling plane 40 of the head of the rail 4.
  • a central tubular element 75 projects horizontally and centrally from the central body 70 of the jaw 7 and is parallel to and on the opposite side of the guide bars 1, as can be seen in figures 1 and 2, or perpendicular as shown in figure 5 in an alternative embodiment, as will be described hereinafter.
  • An inferior portion projects from the central body 70 of the jaw 7, which inferior portion exhibits lateral vertical portions 71 which engage with the edge 41 of the rail head.
  • a flat inclined plate 72 is solid to the vertical portions 71 and projects towards the guide bars 1 in order to engage at its end portions with the fishplate surfaces 42 of the rail 4.
  • a portion of support 73 for an inclined plate 74 extends centrally upwards from the central body 70 of the jaw 7 and parallel to the flat plate 72.
  • Figures 1, 3 and 5 show how the upper inclined plate 74 functions as a strike plate.
  • the jaw 8 of the vice 3' develops vertically (see figure 5) and exhibits a vertical face 80 turned towards the jaw 7 and centrally holed, and lateral walls 81 destined to engage with the edge 71 of the rail 4 head.
  • the vertical lateral walls 81 of the jaw 8 are solid to the flat plate 72 of the jaw 7 and to an inclined upper end plate 84 which, like inclined plate 74, functions as a striker.
  • the jaw 7 is solid between the ends of the guide bars 1 and is fixed with respect to them.
  • the jaw 8, which is mobile, is fixed to the jaw 7 through a connection with a flathead pivot 9 and a key 100.
  • the pivot 9 passes through the central hole of the jaw 8, striking with its flat head against the jaw 8 vertical face 80: it also passes through the tubular element 75 of the jaw 7, from which element 75 a grooved portion 9a of it projects (see figure 2) having a diametral hole destined to receive a pin 11.
  • the key 100 has inclined sides which are removably insertable in the pivot 9 groove 9a: its function is to near jaw 8 to jaw 7.
  • a spring 12 is positioned between jaw 7 and jaw 8, which spring 12 is coaxial to the pivot 9 and has the function of keeping the two jaws 7 and 8 apart up to the limit of the pin 11, which last acts as an endrun striker if the key 100 is not inserted in 05 the groove 9a of the pivot 9.
  • the tubular element 75 exhibits an end diametral recess 75b, which the key 100 can enter when the flathead pivot 9 is turned: when this operation is performed, the jaws 7 and 8 are distanced and the vice can run along the rail 4.
  • the support device 5 of the drill 2 on the guide bars 1 comprises an adjustable support frame 50 and associated parallel sliding cylindrical seats 51 on the guide bars 1.
  • the frame-seats assembly 5 are removable from the guide bars 1.
  • the adjustable drill support frame 50 comprises lateral C-brackets 52 perpendicular to the guide bars 1 for the housing of the drill 2 and preferably also its gear reducer 2a. There is a slot 53 on each of the C-brackets 52 for the passage on each side of adjustment bolts 54 which, cooperating with the gear reducer 2a (not shown), adjust the drill 2 position.
  • a rack (not illustrated) can be present on the gear reducer box at and parallel to one of the two C-brackets 52, which rack meshes with a rotatably and preferably friction-mounted command pinion 57 present on one of the C-brackets 52 and connected to a manoeuvring organ 58.
  • the adjustable drill suspension frame 50 further comprises, at the free ends of the C-brackets 52, a solid connecting element 55 having a function of stiffening the frame and also functioning as a gripping organ for the transport of the whole assembly 5 when it is removed from the guide bars 1.
  • the manoeuvring means 6 of the drill 2 on the guide bars 1 comprise two parallel racks 10 superiorly solid to the guide bars 1.
  • the racks 10 extend considerably over the length of the guide bars 1, but not up to their end zones.
  • the means 6 further comprise a first gear couple 60 meshing with the racks 10 through vertical openings 56 made in the cylindrical seats 51 and keyed on a first transversal shaft 61 which, thanks to the presence of slide bearings 61a (see figure 6) is rotatable on the adjustable drill support frame 50 by means of an end handle 62.
  • the means 6 also comprise a second gear couple 63 meshing with the first gear couple 60 keyed on a second transversal shaft 64 and, thanks to slide bearings 64d, rotatable on the adjustable drill support frame 50 and bearing a perpendicular turning head 65 rotatable by use of a turning rod 66 of adequate length.
  • the manoeuvring means 6 function as follows.
  • the first gear couple 60 meshes with the racks 10.
  • the adjustable drill support frame 50 is made to move, and with it the drill 2, either forwards or backwards.
  • the drill 2 and thus its chuck and bit 90, are brought up to contact the web 45 of the rail 4.
  • the further advancement bringing about the boring of the hole in the rail 4 is performed by turning the rod 66, which provides the correct pressure of the bit 90 on the web 45.
  • Figures 1 to 3 show an arrangement of the structure wherein the guide bars 1 are arranged horizontally, and wherein the jaw 7 of the vice 3 is fixed between the two guide bars 1, with the bars 1 axes and the pivot 9 axis all parallel, so that the drill bit 90 is perpendicular to the web 45 of the rail 4.
  • Figure 5 shows an arrangement of the structure wherein the guide bars 1 are arranged vertically and wherein the jaw 7 of the vice 3' is fixed between the bars 1 in such a way as to create a perpendicular relation between the guide bar 1 axes and the axis of the pivot 9.
  • the bit 90 axis is perpendicular to the flange 46 of the rail 4.
  • the invention permits of manually adjusting the drill 2 resistance to advancement on the racks 10 along the parallel guide bars 1.
  • the manoeuvring means 6 comprise a clutch device, mounted coaxially to the second transversal shaft 64 and interacting between the head 65 and the drill support device 5.
  • the shaft 64 has a threaded end portion 64a and a socket 64b for a key.
  • the clutch device includes an adjustment collar 67, internally threaded and screwable on a counterthread realised in the end portion 64a of the shaft 64, a pressure collar 68, slidable along the shaft 64 and engaged on it by means of a key coupling 64c, and an elastic element 69, preferably constituted by a plurality of belleville washers interpositioned between the adjustment collar 67 and the pressure collar 68.
  • the belleville washers 69 are compressible by manually screwing the adjustment collar 67 so that it exerts on the pressure collar 68 first a rightwards movement (see figure 6) in the direction of the arrows F-F, and, at the endrun stop, adequate pressure on relative contact surfaces 68a, 5a, predisposed for exactly this purpose, between the slidable collar and the drill support device.
  • the adjustment collar 67 is unscrewed on the threaded portion 64a of the shaft 64 in a leftwards direction (arrow F, figure 6), returning into the shown position.
  • the adjustment collar 67 enables different elastic element 69 pressure levels to be achieved on the pressure collar 68, ranging from limited clutch for a greater resistance to drill advancement up to a complete blocking of the drill movement.
  • means for retracting the whole drill 2 and the support frame.
  • These means can be in the form of a cross-bar 91 removably connected to the guide bars 1 at their opposite end to the vice 3, a spring 92 fixed to the support frame 50 and resisting its advancement movement, and a threaded rod 93 passing through the cross-bar 91 and connected to a handle 94, for manual adjustment of the spring tension.
  • the spring 92 is connected at one end to the support frame 50 and at the other end to the bottom end of the rod 93.
  • the spring 92 is tensed by the handle 94 n an operative position starting at the point where the drill bit 90 is touching the surface to be bored, and it acts in contrast with the movement of the bit 90 into the hole so that the same can be withdrawn easily on completion of the boring operation.
  • the various positions of the vice 3 are as follows.
  • the vice is in a blocking position on the rail 4.
  • the vice 3 is in a non-operative position with regard to the flange of the rail 4, and thus the structure cannot slide along the rail.
  • the vice When the key 100 is removed from the slot 9a of the pivot and the pin 11 strikes against the free end 75a of the tubular element, the vice is in a loose non-operative position between the first and second jaws 7 and 8, and the structure can be dismounted and moved to another workplace.
  • the support and coupling structure with its associated drill can be used in situations where, with the known art, it was impossible to reach, eg. at junction zones. Thanks to the fact that almost all of the mass of the coupling structure and its relative motor group is situated above the rolling plane of the rail 4, with only the gear reducer and the drill bit (in all, about 30-40 cm) being below the rolling plane, the drill can be operated in very restricted areas.
  • Another advantage is that the drill can be separated from its support, and the support itself can be separated into many parts, rendering the whole assembly easy to transport, even by a single person.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Drilling And Boring (AREA)
EP94830078A 1993-03-25 1994-02-21 Support et raccord pour perceuse portable pour rails Withdrawn EP0626480A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITRM930189 1993-03-25
ITRM930189A IT1261431B (it) 1993-03-25 1993-03-25 Struttura di sostegno e di aggancio portatile forarotaie.
ITRM940007 IT233076Y1 (it) 1994-01-14 1994-01-14 Struttura perfezionata di sostegno e di aggancio per trapano portatile forarotaie.
ITRM940007U 1994-01-14

Publications (1)

Publication Number Publication Date
EP0626480A1 true EP0626480A1 (fr) 1994-11-30

Family

ID=26332034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830078A Withdrawn EP0626480A1 (fr) 1993-03-25 1994-02-21 Support et raccord pour perceuse portable pour rails

Country Status (1)

Country Link
EP (1) EP0626480A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2356370A (en) * 1999-11-17 2001-05-23 Cembre Ltd Drill for drilling holes in railway track
CN103737068A (zh) * 2013-12-31 2014-04-23 江苏南铸科技股份有限公司 新型履带板钻孔夹具
CN114027054A (zh) * 2021-11-18 2022-02-11 王红霞 一种森林工程用树木根部注药器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE468806A (fr) *
US1502339A (en) * 1923-09-17 1924-07-22 Ingersoll Rand Co Bonding drill
US3945749A (en) * 1975-04-24 1976-03-23 Racine Railroad Products, Inc. Clamping apparatus for supporting a machining device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE468806A (fr) *
US1502339A (en) * 1923-09-17 1924-07-22 Ingersoll Rand Co Bonding drill
US3945749A (en) * 1975-04-24 1976-03-23 Racine Railroad Products, Inc. Clamping apparatus for supporting a machining device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Great Britain: New rail drill", RAIL INTERNATIONAL, vol. 21, no. 12, December 1990 (1990-12-01), BRUXELLES BE, pages 33, XP000170607 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2356370A (en) * 1999-11-17 2001-05-23 Cembre Ltd Drill for drilling holes in railway track
CN103737068A (zh) * 2013-12-31 2014-04-23 江苏南铸科技股份有限公司 新型履带板钻孔夹具
CN103737068B (zh) * 2013-12-31 2016-03-30 江苏南铸科技股份有限公司 新型履带板钻孔夹具
CN114027054A (zh) * 2021-11-18 2022-02-11 王红霞 一种森林工程用树木根部注药器

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