EP3360646B1 - Outil de serrage et palier d'outil de serrage - Google Patents

Outil de serrage et palier d'outil de serrage Download PDF

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Publication number
EP3360646B1
EP3360646B1 EP17155241.7A EP17155241A EP3360646B1 EP 3360646 B1 EP3360646 B1 EP 3360646B1 EP 17155241 A EP17155241 A EP 17155241A EP 3360646 B1 EP3360646 B1 EP 3360646B1
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EP
European Patent Office
Prior art keywords
clamping
bearing
lever
bearing surface
bearing body
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.)
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Application number
EP17155241.7A
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German (de)
English (en)
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EP3360646A1 (fr
Inventor
Hermann Niemann
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.)
Lenzkes Spanntechnik GmbH
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Lenzkes Spanntechnik GmbH
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Priority to EP17155241.7A priority Critical patent/EP3360646B1/fr
Publication of EP3360646A1 publication Critical patent/EP3360646A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/10—Arrangements for positively actuating jaws using screws
    • B25B5/104—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element
    • B25B5/108—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element the screw contacting one of the ends of the lever

Definitions

  • clamping tools must be robust and durable, with relatively small (especially applied manually via actuating tools) operating forces generate large clamping forces and are characterized by a simple, yet reliable operation, which also for connecting the clamping tool with a clamping table, bringing about the operative connection between the clamping tool and the workpiece or a tensioning chain and the operation for tensioning the clamping tool must apply. It is possible that with such clamping tools clamping forces can be generated, which can be up to 20 kN, 40 kN, 60 kN or even 90 kN.
  • the invention relates to a bearing body part for such a clamping tool.
  • CH 597 976 A5 discloses a tightening tool having a foot that engages in a cross-section a sliding block, which is bolted to a clamping table and having a coupling cross-section in the form of an inverted T surrounds.
  • An upwardly extending central web of the foot has an oriented in the direction of a pivot axis through hole into which a bearing pin is inserted.
  • the bearing pin is on a grub screw on the Central bridge fixed.
  • the bearing pin forms on both sides of the central web projecting journals.
  • a clamping lever has two parallel side cheeks forming bearing eyes, in which the bearing pins are pivotally mounted. About a hinged in an end region of the clamping lever clamping screw of the clamping lever can be pivoted relative to the foot and the central web, which between the other end of the clamping lever and the clamping table, a workpiece can be clamped.
  • the tensioning rail here has at least one bore, via which the tensioning rail can be screwed to a tensioning table or a tensioning plate with a T-slot nut and thus fixed to the tensioning table or the tensioning plate.
  • the tensioning rail has an upwardly open longitudinal recess, which corresponds approximately to an inverted T in cross section.
  • a clamping lever can be inserted from the front side.
  • the tensioning lever extends out of the tensioning rail along the vertical leg of the T of the longitudinal recess.
  • the clamping lever integrally forms on both sides of lateral bearing pin, which are guided in the transverse limbs of the T of the longitudinal recess.
  • the guide is made such that on the one hand a displacement of the clamping lever in the longitudinal direction of the clamping rail is possible and on the other hand, a pivoting of the clamping lever to a predetermined by the bearing pin pivot axis relative to the clamping rail is possible.
  • the clamping lever forms a rear clamping lever part, in which a clamping screw is screwed in one end.
  • a front clamping lever part of the clamping lever forms a clamping jaw for the workpiece or serves as a linkage of a tensioning chain.
  • the bearing shoe has a horizontal plate which is guided displaceably in the clamping rail. From the horizontal plate, a center bar extends vertically upwards. From the central web, in turn, two bearing pins extend integrally laterally outwards.
  • the clamping lever has on its underside a complex shaped recess, which is closed down in the rear half by two parallel, arcuate bearing arms of the clamping lever. The bearing arms are freely cantilevered with free end portions. Upper sides of the bearing arms form bearing shells for the bearing journals of the tensioning shoe.
  • the bearing shoe can be inserted with the central web and the bearing pin in front of the bearing arms in the recess of the clamping lever and then guided in the recess to the rear, so that the bearing pins come with their undersides to rest on the bearings.
  • DE 1 253 556 B discloses a tightening tool that does not vertically skew a workpiece on a chuck table, but rather axially clamps a workpiece between a abutment and a cocking lever.
  • the clamping lever here has a bore in which a bearing pin is held by a press fit.
  • the unit formed with the clamping lever and the bearing pin is then inserted into a T-slot of a clamping table.
  • With a pivoting of the clamping lever for axial clamping of the workpiece the lateral surface of the protruding from the clamping lever end portions of the bearing pin rolls on a support surface of the clamping table.
  • the invention has for its object to provide a clamping tool and a bearing body part for a clamping tool, which is particularly improved in terms of manufacturing, assembly, production costs, the use of materials, the force ratios and / or the maximum clamping force.
  • a clamping tool which has a clamping rail (loose, for example screwable to a clamping plate or a clamping table), a clamping lever and a bearing body on which the clamping lever is pivotally mounted about a pivot axis and which is displaceably guided in the clamping rail has ,
  • a clamping rail loose, for example screwable to a clamping plate or a clamping table
  • the clamping rail, the clamping lever, the bearing body and a clamping screw are responsible for the generation of the clamping force in the clamping tool.
  • the bearing body of the clamping tool according to the invention has at least one convex clamping lever bearing surface and two (for example flat) clamping rail bearing surfaces.
  • the at least one convex clamping lever bearing surface (viewed in the direction of the pivot axis of the clamping lever) between the two clamping rail bearing surfaces is arranged.
  • the clamping lever has at least one concave bearing surface.
  • the bearing of the clamping lever does not take place via two integral, laterally extending bearing journal with convex bearing surfaces, which are mounted in concave clamping lever bearing surfaces, for example, a trained as a clamping shoe bearing body.
  • the clamping lever via the at least one concave bearing surface is rotatably supported about the pivot axis on the convex clamping lever bearing surface of the bearing body.
  • the bearing body is over the slide rail bearing surfaces of the bearing body displaceably guided in the clamping rail, wherein in addition to the clamping rail bearing surfaces, the support of the bearing body on the clamping rail (upwards, possibly also with a lateral guide) can be done.
  • the tensioning lever has at least one recess which is peripherally closed transversely to the pivot axis in a cross section.
  • the recess forms the or a concave bearing surface, via which the clamping lever is supported rotatably about the pivot axis on the convex clamping lever bearing surface of the bearing body. If the bearing body in the direction of the pivot axis in the clamping lever, namely the edge-closed recess of the clamping lever, used, this can also be removed only in the direction of the pivot axis again from the recess of the clamping lever.
  • the convex clamping lever bearing surface of the bearing body and on the other hand, the concave bearing surface of the clamping lever there are many possibilities. It is entirely possible that the convex clamping lever bearing surface and the concave bearing surface are formed with corresponding cylindrical cross sections, which allow pivoting of the bearing body relative to the clamping lever, even under high loads. But it is also possible that the convex clamping lever bearing surface of the clamping lever and the concave bearing surface of the clamping lever are formed cylindrically with different diameters, wherein the diameter of the convex clamping lever bearing surface is smaller than that of the concave bearing surface. Furthermore, the invention also proposes embodiments in which the convex tensioning lever bearing surface of the bearing body and / or the concave bearing surface of the tensioning lever are / are only partially cylindrical, in which case the above applies with regard to the possible diameters.
  • the extent in the circumferential direction is less than 180 °. Investigations by the applicant have shown that, in particular for a circumferential angle ⁇ of the first partial cross section in the range of 120 ° to 150 °, ensuring the required pivoting angle of the clamping lever, a large contact surface between the disk body of the bearing body and the clamping lever and a reliable avoiding pinching of the disk body can be guaranteed.
  • the at least one convex clamping lever bearing surface in particular via a central web of the bearing body or a corresponding connection region, is led out of the clamping rail, whereby then the pivot axis of the clamping lever is disposed above the clamping rail.
  • the at least one convex clamping lever bearing surface and the two clamping rail bearing surfaces are arranged in the interior of the clamping rail.
  • the bearing body can be used loosely in the clamping lever and secured only with the assembly of the clamping lever with the bearing body disposed therein with the clamping rail against leakage from the clamping lever.
  • An assembly of the Tensioning lever with the bearing body arranged therein can be simplified if the bearing body is secured in the tensioning lever via any securing device.
  • the bearing body with the clamping lever is releasably locked or locked.
  • the securing device is a screw, in particular a grub screw or a threaded pin, by means of which the clamping lever is screwed to the bearing body.
  • the bearing body may have a transverse to the pivot axis oriented blind hole threaded hole, while the bearing body has on the underside aligned in the mounted position with the blind hole threaded through hole or through hole.
  • the screw can then be screwed in the mounted position of the bearing body in the recess of the clamping lever with the blind hole.
  • a protruding from the blind hole threaded head or an end portion of the screw can then with or without play the bearing body in the recess of the clamping lever axially and / or secure against rotation, since the head or end of the screw between the boundary surfaces of the through hole or through-hole of Tension lever is caught.
  • the shape and / or dimensions on the one hand of the head or end portion of the screw and on the other hand, the naturalgangsaus Principleung or through hole of the clamping lever, the size of any game in the axial direction and / or in terms of a rotation are given constructive.
  • two bearing body parts are inserted into a through-hole or two blind hole recesses of the clamping lever, they can each be locked with the clamping lever, locked or screwed.
  • the pivot axis and a degree of freedom of movement of the bearing body relative to the clamping rail define a plane.
  • the slide rail bearing surface in this case is formed, and / or the bearing surface of the clamping rail with respect to this plane an angle ⁇ of 0 °.
  • the tensioning rail bearing surface and / or the bearing surface of the tensioning rail may be inclined at an angle ⁇ not equal to zero with respect to the said plane. This may possibly improve the guidance between the bearing body and the tensioning rail during the displacement along the shift degree of freedom. Possibly, as a result, the force relationships between the bearing body and the clamping rail can be improved.
  • an angle ⁇ may be in the range of 3 ° to 14 ° (in particular 4 ° to 10 ° or 5 ° to 9 °).
  • the bearing body (except for any securing elements such as a round wire ring) is integrally formed.
  • the one-piece bearing body is inserted laterally into a passage recess of the clamping lever, so that it protrudes on both sides of the clamping lever, whereby a recording of the protruding ends of the bearing body in the clamping rail is possible.
  • the bearing body has two bearing body parts.
  • the bearing body parts each form a clamping rail bearing surface and a clamping lever bearing surface.
  • the two bearing body parts are inserted from both sides in the direction of the pivot axis in at least one recess of the clamping lever.
  • the bearing body parts each have two disk bodies arranged offset from one another, which can be directly connected to one another or between which a connecting web or a connecting region can extend.
  • a disk body in this case forms the convex clamping lever bearing surface, while the other disk body forms the clamping rail bearing surface.
  • the disk body that forms the clamping rail bearing surface preferably in the vertical direction with a clearance or play caught in a guide groove of the clamping rail.
  • a design specification of the height of the pivot axis relative to the guide groove of the clamping rail can be done.
  • the bearing body parts in addition to the said disk bodies and a possible connecting web or connecting region each have a pin, via which the bearing body parts are releasably connected to the clamping lever, in particular latched or locked.
  • the bearing body parts can be connected to the clamping lever to a preassembled mounting unit in which the bearing body parts are held captive on the clamping lever. This preassembled mounting unit can then be used in the clamping rail.
  • the relative position of the convex tension lever bearing surface and the tensioning rail bearing surface of a bearing body part may be arbitrary, the distance of which determines the height of the pivot axis relative to the tensioning rail.
  • the pivot axis extends through a connecting region of the two disk body or in the height direction between the clamping lever bearing surface and the clamping rail bearing surface, resulting in a particularly compact design.
  • the aforementioned disk body can have any desired disk thickness, which can be constant for a particularly simple embodiment.
  • the disk body forming the tension rail bearing surface has a downwardly decreasing disk thickness. This embodiment is based on the finding that a reduction in the thickness of the disc body of this disc body down no negative impact on the strength of the bearing body, since the upper portions of the disc body are primarily claimed here.
  • investigations by the applicant have shown that in the case of tensioning rails, in particular the transition region or the corner between vertical lateral walls and a base plate can fail at high clamping forces.
  • the design of the disk body with downwardly decreasing disk thickness here allows a reinforcement of the clamping rail in said transition region or the corner.
  • the nature of Reduction of the disc thickness of the disc body down can be arbitrary.
  • the pane body is reduced downwards by means of a chamfer with regard to its pane thickness.
  • a bearing body part for a clamping tool of the type described above has two mutually offset disk body.
  • a disk body forms a convex tension lever bearing surface
  • the other disk body forms a (preferably flat) tension rail bearing surface.
  • the bearing body part further has a pin, via which the bearing body part (preferably releasably) with a clamping lever is connectable.
  • the disk body forming the tension rail bearing surface, the disk body forming the convex tension lever bearing surface, and the pin are sequentially connected to each other in order in the direction of the pivot axis.
  • Fig. 1 shows a clamping tool 1 in a side view.
  • the clamping tool 1 is intended, with a clamping plate, a clamping table, a wall u. ⁇ ., In particular in the area of a T-slot with a slot nut inserted therein, to be screwed and a clamping lever 2 a workpiece with the clamping table, the clamping plate, the wall u. ⁇ .
  • a generation of a clamping force takes place here by means of the clamping lever 2, a clamping rail 3, a clamping screw 4 and a bearing body 5, which may be formed with two bearing body parts 6, 7.
  • the clamping tool 1 can also be referred to as a "four-part clamping tool", even if other attachments are available.
  • clamping tool 1 is not screwed with the clamping rail 3 directly on a clamping table or a clamping plate, but between clamping table or clamping plate and clamping tool a structural element is interposed, as this is described in the current prospectus of the Applicant and which to increase the Height of the pivot axis 10 relative to the clamping plate or the clamping table is used.
  • Fig. 2 the tensioning lever 2 is shown in a side view.
  • the clamping lever 2 has a front clamping lever segment 8 and a rear clamping lever segment 9.
  • the free end region of the front clamping lever segment 8 can be clamped directly against the workpiece with a clamping jaw.
  • a pivot axis 10 of the clamping lever 2 which is vertical to the plane according to Fig. 2 is oriented, a workpiece sa plate is mounted, which is pressed with the clamping force against the workpiece.
  • a tensioning chain can be hinged to the free end portion of the front tension lever segment 8 in a conventional manner.
  • the bore axis of the threaded bore 11 has a distance or lever arm 12.
  • the tension lever 2 has a bulge 13 downwards.
  • the clamping lever 2 has a coaxial with the pivot axis 10 oriented through hole 14 with a radius 15.
  • the through hole 14 passes via steps 16a, 16b arranged in on opposite sides of the clamping lever 2 Recesses 17a, 17b, which have a larger cross section than the through hole 14. Adjacent the recesses 17a, 17b, the through hole 14 has two circumferential grooves 18a, 18b about the pivot axis 10.
  • the recesses 17a, 17b are edge-closed and bounded by a circumferential wall 19a, 19b, which is oriented parallel to the pivot axis 10.
  • a circumferential wall 19a, 19b which is oriented parallel to the pivot axis 10.
  • the walls 19a, 19b are formed as partial cylinder segments 22a, 22b.
  • the partial cylinder segments 22a, 22b have a radius r (reference numeral 23), wherein the cylinder axis corresponds to the pivot axis 10.
  • the radius R (reference 26) is greater than the radius r (reference 23).
  • the transition between the partial cross-sections 20, 24 is preferably not via a step, but gradually or with a curved profile in cross-section.
  • the bearing body part 6 is formed with disk bodies 27, 28 and a pin 29, wherein for the illustrated embodiment, the disk body 27th , the disk body 28 and the pin 29 in this order in the direction of the pivot axis 10 directly adjacent to each other and are integrally formed by the bearing body part 6.
  • the disk body 27 has on its upper side, here above the pivot axis 10, a here flat clamping rail bearing surface 30 and on its underside a lower, here also flat clamping rail bearing surface 31 on.
  • the tensioning rail bearing surface 30 and the tensioning rail bearing counter surface 31 have a height h in the height direction (reference numeral 40).
  • the outer surface of the disk body 27 passes over rounded portions 32, 33 from the tensioning rail bearing surface 30 into the tensioning rail bearing surface 31.
  • the disk body 27 is integrally via a connection region 34, which is here formed by an overlap of the disk body 27, 28, into the disk body 28, which is arranged offset to the disk body 27.
  • the disk body 27 has a cylindrical lateral surface 35 with a radius r (reference numeral 23), which corresponds to a play or transition fit the radius of the first partial cylinder segment 22 of the recess 17 of the clamping lever 2.
  • the cylindrical lateral surface 35 is arranged coaxially to the pivot axis 10.
  • Via a connecting region 36 of the disk body 28 goes over into the pin 29.
  • the pin 29 has a circumferential groove 37.
  • the distance of the groove 37 from an end face 38 of the disk body 28 corresponds approximately to the distance of the groove 18 from the step 16 or is slightly larger than this. It is possible that the pin 29 in the outer end region has a chamfer 39 or insertion bevel.
  • the diameter of the pin 29 forms a play or transition fit with the diameter of the through hole 14 of the clamping lever. 2
  • the tensioning rail 3 is shown in a longitudinal or cross section.
  • the tensioning rail 3 has a roughly U-shaped cross section with a base leg 41 and parallel side legs 42, 43.
  • the base leg 41 forms a bottom plate 44 of the tensioning rail 3, with which the tensioning rail 3 rests on a clamping table or a clamping plate.
  • the bottom plate 44 has (here two) mounting holes 45, 46 which are formed as stepped through holes and over which the clamping rail 3 in the region of the bottom plate 44 with a clamping table or a clamping plate, in particular one in a T-slot of the clamping table or the clamping plate arranged sliding block, can be screwed.
  • the mounting holes 45, 46 are formed so widened away in the direction of the clamping plate or the clamping table that in the bottom plate 44, a head of a fastening screw can be accommodated without the head of the fastening screw protruding from the bottom plate 44 upwards.
  • a head of a fastening screw can be accommodated without the head of the fastening screw protruding from the bottom plate 44 upwards.
  • the side legs 42, 43 form vertically extending walls 47a, 47b of the tensioning rail 3.
  • the walls 47a, 47b have an inwardly oriented transverse web 48a, 48b.
  • Lateral guide grooves 49a, 49b have a cross-section corresponding to a horizontal U, wherein the bottom of the guide grooves 49a, 49b is formed by the walls 47a, 47b, while the sides of the guide grooves 49a, 49b are limited by the transverse webs 48a, 48b and the bottom plate 44.
  • the here horizontally oriented underside of the transverse webs 48a, 48b forms a bearing surface 50a, 50b.
  • a lower bearing counter surface 51 a, 51 b is formed by the bottom plate 44.
  • the guide grooves 49a, 49b are bounded by the bearing surfaces 50a, 50b and the bearing opposing surfaces 51a, 51b in the height direction.
  • the bearing surface 50a, 50b and the bearing counter surface 51a, 51b have a distance H in the vertical direction (reference numeral 52), wherein the distance H (reference numeral 52) is greater than or a clearance fits with the distance h (reference numeral 40).
  • Fig. 6 shows the clamping tool 1 in the assembled state.
  • suitable round wire rings 53a, 53b are first inserted into the grooves 37a, 37b of the pins 29 of the bearing body parts 6, 7.
  • the pins 29 of the bearing body parts 6, 7 with round wire rings 53 arranged thereon are inserted into the tensioning lever 2, namely the through-bore 14.
  • the round wire rings 53 engage in the grooves 18 of the clamping lever 2, whereby the bearing body parts 6, 7 captive and releasably held on the clamping lever 2.
  • a play or transition fit is preferably selected, so that a rotation of the disc body 28 and thus of the bearing body part 6, 7 relative to the clamping lever 2 is possible.
  • an outer surface 55 of the disk body 28 is arranged flush with the outer surface of the clamping lever 2 or this is slightly above the outer surface of the clamping lever 2 via.
  • the clamping rail 3 forms for this purpose an upwardly open T-slot, wherein the vertical leg of the inverted T is bounded by the end faces of the transverse webs 48a, 48b, while the transverse leg of the T formed by the guide grooves 49a, 49b become.
  • the tensioning lever 2 extends exclusively in the region of the vertical leg of the T, while in the transverse legs of the T, the two disk bodies 27a, 27b are arranged.
  • the disk body 28a, 28b and the pins 29a, 29b extend (in the recess 17 and the through hole 14) in the region of the vertical leg of the T and in the interior of the clamping lever 2.
  • the slide rail bearing surfaces 30a, 30b of the two bearing body parts 6, 7 are arranged in a horizontal plane.
  • the slide rail bearing mating surfaces 31a, 31b wherein the bearing body parts 6, 7 are rotated so that the clamping rail bearing mating surfaces 31a, 31b are in the lowest pivoting position.
  • the disk body 27a, 27b can be inserted into the guide grooves 49a, 49b of the clamping rail 2.
  • the bearing body parts 6, 7 and the clamping lever 2 are trapped in the clamping rail 3.
  • the bearing body parts 6, 7 can not escape from the tensioning lever 2 as a result of the lateral play-bearing or play-free contact and guidance on the walls 47a, 47b of the tensioning rail 3.
  • the clamping screw 4 is screwed and this is based with the front side, in particular with a pivotally mounted or ball joint plate 56, on the bottom plate 44 of the clamping rail 3 from at the same time conditioning the clamping lever 2 on a workpiece, generates the clamping tool. 1 the desired clamping force.
  • This clamping force has the consequence that the bearing body parts 6, 7 are pressed against the bearing surfaces 50a, 50b of the tensioning rail 3 with the tensioning rail bearing surfaces 30a, 30b.
  • the clamping lever 2 in the first partial cross section 20a, 20b which forms a cylinder-segment-shaped bearing surface 57a, 57b, pressed against the underside of the cylindrical lateral surface 35 of the disk body 28, whereby the corresponding partial cross section of the cylindrical lateral surface 35 of the bearing body parts 6, 7 a Spannhebel- Storage surface 58a, 58b forms.
  • the pivot axis 10 is disposed within the cross section of the clamping rail 3.
  • the disk body 28 and thus the bearing body parts 6, 7 do not protrude beyond the upper side of the tensioning rail 3. It is quite possible that the offset of the disk body 27, 28 is greater, so that the pivot axis 10 can be further displaced upwards. It is even possible that the disk body 27, 28 have no overlap, but are offset in the vertical direction to each other, wherein then an additional connection via a connection region 34, for example a connecting web or an additional disk body, can take place.
  • a part of the acting clamping force can be transmitted between the bearing body part 6, 7 and clamping lever 2 via the pin 29.
  • the pin 29 is used exclusively for the pre-assembly of the bearing body parts 6, 7 on the clamping lever. 2
  • Fig. 8 shows a modified embodiment of a clamping tool 1, in which the disk body 27a, 27b do not have a constant disk thickness, but rather have a chamfer 62 down, so that the disk thickness decreases downwards.
  • This refinement is based on the knowledge that the tensioning rail 3 is subjected to high tension forces and has shown that a failure of the tensioning rail preferably takes place in the transition region from the base plate 44 to the lateral walls 47a, 47b, in particular due to a notch effect in the region of a corner 61.
  • an inclination of the walls 47a, 47b can take place so that angling in the area of the corners 61a, 61b does not take place with an angle of 90 °, but rather with an angle which is greater than 90 °, for example in the range of 90 ° to 110 ° or 92 ° to 105 °, takes place, which can result in a better stress distribution in the tensioning rail 3.
  • the lateral walls 47a, 47b have a greater wall thickness, in particular in the region of the corners 61a, 61b.
  • the tensioning rail bearing surfaces 30a, 30b of the bearing body parts 6, 7 and the bearing surfaces 50a, 50b of the tensioning rail 3 were oriented horizontally.
  • Fig. 9 to 11 show an embodiment which basically the embodiment according to Fig. 1 to 7 equivalent.
  • the clamping rail bearing surfaces 30a, 30b of the bearing body parts 6, 7 and the bearing surfaces 50a 50b of the clamping rail 3 by an angle ⁇ (reference numeral 63) in the direction of the interior of the clamping rail 3 downwardly inclined.
  • the tensioning rail bearing counter surfaces 31a, 31b of the bearing body parts 6, 7 and the bearing counter surfaces 51a, 51b of the tensioning rail 3 can also be inclined.
  • An embodiment with at least inclined clamping rail bearing surfaces 30 and bearing surfaces 50 is used in particular for a tensioning rail 3, which is made of a drawn profile.
  • Fig. 12 to 14 an embodiment is shown in which the bearing body 5 is integrally formed.
  • the bearing body parts 6, 7 have only the disk body 27a, 27b and 28a, 28b and not via pins 29a, 29b. Rather, the inner disk body 28 are connected via a connecting portion 64 directly to each other.
  • the disk body 28a, 28b thus have a continuous cylindrical surface 35. However, in this continuous cylindrical surface 35 u.
  • U. a circumferentially circumferential groove 65 is provided. In the groove 65, a round wire ring 66 is arranged.
  • the clamping lever 2 does not have the through hole 14, which merges via the step 16 in the recess 17.
  • the recess 16a, 16b may be centrally present a circumferential groove, so that the bearing body 5 can be latched on the round wire ring 66 in the clamping lever 2.
  • the bearing body 5 is located with the clamping rail bearing surfaces 30a, 30b on the bearing surfaces 50a, 50b of the clamping rail 3 with the clamping force.
  • the tensioning lever 2 is supported by the bearing surface 57a, 57b on the tensioning lever bearing surface 58a, 58b.
  • Fig. 15 shows a bearing body 5, which except for the differences described below the bearing body according to Fig. 13 equivalent.
  • the bearing body 5 has here but not a groove 65 for securing the bearing body 5 in the clamping lever 2. Rather, the bearing body 5 has centrally to its longitudinal axis or to the pivot axis 10 and from its underside via a blind hole threaded hole 67 which transverse to Swivel axis 10 is oriented.
  • Fig. 16 shows the bearing body 5 according to Fig. 15 in built-in the clamping lever 2 state. It can be seen here that the clamping lever 2 has on its underside a through-hole 68 or through-bore 69, which is oriented coaxially with the blind-hole threaded hole 67 in the mounted state. Through the through hole 69 is connected to the blind hole 67 a screw 70, screwed here a threaded pin 71. An end portion or head 72 of the screw 70 is without play or, as in Fig. 16 shown caught with play in the direction of the pivot axis 10 and / or in the circumferential direction about the pivot axis 10 in the through hole 69. In this way, the bearing body 5 can be preassembled in the clamping lever 2 and used as a structural unit in the clamping rail 3.
  • Fig. 17 shows a bearing body part 6, 7, which except for the differences described below the bearing body part 6, 7 according to Fig. 4 and 5 equivalent.
  • the bearing body part 6, 7 here but does not have a groove 37 for securing the bearing body part 6, 7 in the clamping lever 2. Rather, the bearing body part 6, 7 has a blind hole threaded hole 67, which emanates from the bottom of the bearing body part 6, 7 and is oriented transversely to the pivot axis 10.
  • Fig. 18 shows bearing body parts 6, 7 according to Fig. 17 in built-in the clamping lever 2 state.
  • the clamping lever 2 has on its underside passage recesses 68a, 68b or through holes 69a, 69b, which are oriented in the mounted state coaxially with the blind-threaded holes 67a, 67b of the bearing body parts 6, 7.
  • screws 70a, 70b are screwed to the blind-threaded bores 67a, 67b.
  • the end portions or heads 72a, 72b of the screws 70a, 70b are without play or, as in FIG Fig.
  • the bearing body parts 6, 7 can be preassembled in the tensioning lever 2 and used as a structural unit in the tensioning rail 3.
  • Fig. 19 shows a further embodiment of the invention, in which the lower side of the clamping lever 2 transverse to the pivot axis 10 oriented through-threaded holes 74a, 74b, in which screws 70a, 70b, here grub screws 75a, 75b are screwed.
  • the screws 70a, 70b have a non-planar, but convex (here conical or beveled) end face.
  • the pins 29a, 29b in this case have circumferential grooves 76a, 76b whose cross sections correspond to the cross sections of the end faces of the screws 70a, 70b.
  • a locking element such as a detent ball and a detent spring is used in the through-threaded bore 74, wherein the locking element protrudes on the side facing the pin 29 from the clamping lever 2 in the direction of the pin 29, without the clamping lever 2 on this Side escape, the detent spring is biased in the direction of the groove 76 via a screwed into the through-threaded bore 74 screw 70 and is applied in this way the locking element in the direction of the groove 76, a connection of the bearing body parts 6, 7 with the Tensioning lever 2 via a latching connection.
  • the securing device 73 is formed with the screw 70, the detent spring and the locking element and the groove 76 and for the other illustrated embodiments, the securing device 73 is formed as a round wire ring 53.
  • any other securing devices can be used in a clamping tool 1 according to the invention.
  • the safety devices 73 shown here are used for other exemplary embodiments shown here or for non-illustrated exemplary embodiments of the invention.
  • securing devices 73 which are shown here in connection with a one-piece bearing body 5, can also be used for securing bearing body parts 6, 7 (and vice versa).
  • a power transmission between the clamping lever 2 and the bearing body 5 and the bearing body parts 6, 7 is not via a line contact, but in the partially cylindrical partial cross section 20, that is, over a curved surface, whereby a surface pressure can be reduced.
  • a power transmission between the bearing body 5 and the bearing body parts 6, 7 does not take place via a line contact, but via the preferably flat clamping rail bearing surface 30th
  • the clamping tool according to the invention does not serve for axial clamping of a workpiece with a clamping force which is oriented parallel to the clamping table. Rather, a clamping force is generated, which tensions the workpiece on the clamping table, so that the clamping force is oriented substantially vertically to the clamping surface of the clamping table.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)

Claims (13)

  1. Outil de serrage (1) avec
    a) un rail de serrage (3),
    b) un levier de serrage (2),
    c) un corps de palier (5) au niveau duquel le levier de serrage (2) est logé de manière pivotante autour d'un axe de pivotement (10) et qui est guidé de manière coulissante dans le rail de serrage (3),
    d) le corps de palier (5) comprenant au moins une surface de palier de levier de serrage convexe (58) et deux surfaces de palier de rail de serrage (30a, 30b), l'au moins une surface de palier de levier de serrage convexe (58) étant disposée entre les deux surfaces de palier de rail de serrage (30a, 30b),
    e) le levier de serrage (2) comprenant au moins une surface de palier concave (57) et
    f) le levier de serrage (2) étant appuyé, par l'intermédiaire de l'au moins une surface de palier concave (57) de manière rotative autour de l'axe de pivotement (10), au niveau de la surface de palier de levier de serrage convexe (58) du corps de palier (5) et le corps de palier (5) étant guidé, par l'intermédiaire des surfaces de palier de rail de serrage (30), de manière coulissante dans le rail de serrage (3),
    g) le corps de palier (5) étant inséré dans le levier de serrage (2) en direction de l'axe de pivotement (10),
    h) le levier de serrage comprenant au moins un évidement (17), qui est fermé sur les bords dans une section transversale par rapport à l'axe de pivotement (10) et qui forme la surface de palier de palier concave (57), par l'intermédiaire duquel le levier de serrage (2) est appuyé de manière rotative autour de l'axe de pivotement (10) au niveau de la surface de palier de levier de serrage convexe (58) du corps de palier (5) et
    i) l'au moins une surface de palier de levier de serrage convexe (58) du corps de palier (5) est constituée d'un corps à disque (28) avec une section transversale cylindrique ou partiellement cylindrique et/ou la surface de palier concave (57) du levier de serrage (2) présente une forme partiellement cylindrique,
    caractérisé en ce que
    j) l'évidement (17) du levier de serrage (2) comprend, dans la section transversale par rapport à l'axe de pivotement (10)
    ja) une première section transversale partielle partiellement cylindrique (20), dont le rayon (23) correspond au rayon du corps à disque cylindrique ou partiellement cylindrique (28) et qui constitue la surface de palier concave (57) du levier de serrage (2), contre laquelle le corps à disque (28) du corps de palier (5) s'appuie de manière pivotante et
    jb) une deuxième section transversale (24), au niveau de laquelle l'évidement (17) du levier de serrage (2) forme un espace intermédiaire (54) avec le corps de palier (5) lorsque le corps de palier (5) s'appuie, avec le corps à disque (28), contre la surface de palier concave (57) du levier de serrage (2), formée par la première section transversale partielle (20).
  2. Outil de serrage (1) selon la revendication 1, caractérisé en ce que la première section transversale partielle partiellement cylindrique (20) présente un angle circonférentiel α (21) de l'ordre de 120° à 150°.
  3. Outil de serrage (1) selon l'une des revendications précédentes, caractérisé en ce que l'au moins une surface de palier de levier de serrage convexe (58) et les deux surfaces de palier de rail de serrage (30a, 30b) sont disposées à l'intérieur du rail de serrage (3).
  4. Outil de serrage (1) selon l'une des revendications précédentes, caractérisé en ce que le corps de palier (5) est fixé dans le levier de serrage (2) par l'intermédiaire d'un dispositif de fixation (73).
  5. Outil de serrage (1) selon la revendication 4, caractérisé en ce que le dispositif de fixation (73)
    a) est conçu comme un dispositif d'encliquetage ou de verrouillage,
    b) est constitué d'une bague de fil plat (53),
    c) est constitué d'une vis (70) ou
    d) est constitué d'un ressort d'encliquetage et d'un élément d'encliquetage.
  6. Outil de serrage (1) selon l'une des revendications précédentes, caractérisé en ce que la surface de palier de rail de serrage (30a, 30b) et/ou la surface de palier (50) du rail de serrage (3) est/sont inclinée(s) par rapport à un plan qui est défini par l'axe de pivotement (10) et par le degré de liberté de coulissement du corps de palier (5) par rapport au rail de serrage (3), d'un angle β (63).
  7. Outil de serrage (1) selon l'une des revendications précédentes, caractérisé en ce que le corps de palier (5) comprend deux parties de corps de palier (6, 7), qui constituent chacune une surface de palier de rail de serrage (30a, 30b) et une surface de palier de levier de serrage (58) et qui peuvent être insérées des deux côtés en direction de l'axe de pivotement (10) dans au moins un évidement (17) du levier de serrage (2).
  8. Outil de serrage (1) selon la revendication 7, caractérisé en ce que les parties de corps de palier (6, 7) comprennent chacune deux corps à disques (27, 28) disposés de manière décalée l'un par rapport à l'autre, un corps à disque (28) constituant la surface de palier de levier de serrage convexe (58) et l'autre corps à disque (27) constituant la surface de palier de rail de serrage (30a ; 30b).
  9. Outil de serrage (1) selon la revendication 8, caractérisé en ce que les parties de corps de palier (6, 7) comprennent chacune un tenon (29) par l'intermédiaire duquel les parties de corps de palier (5, 6) sont reliées de manière amovible avec le levier de serrage (2).
  10. Outil de serrage (1) selon la revendication 9, caractérisé en ce que l'axe de pivotement (10) s'étend à travers une zone de liaison (34) des deux corps à disques (27, 28) ou dans la direction de la hauteur entre la surface de palier de levier de serrage (58) et la surface de palier de rail de serrage (30).
  11. Outil de serrage (1) selon l'une des revendications 8 à 10, caractérisé en ce que le corps à disque (27), qui constitue la surface de palier de rail de serrage (30), présente une épaisseur de disque diminuant vers le bas.
  12. Outil de serrage (1) selon l'une des revendications précédentes, caractérisé en ce que le corps de palier est constitué d'une seule pièce excepté d'éventuels éléments de fixation.
  13. Partie de corps de palier d'outil de serrage pour un outil de serrage (1) selon l'une des revendications précédentes, caractérisée en ce que
    a) deux corps à disques (27, 28), disposés de manière décalée entre eux, sont prévus, un corps à disque (28) constituant une surface de palier de levier de serrage (58) et l'autre corps à disque (27) constituant une surface de palier de rail de serrage (30) et
    b) un tenon (29) est prévu, par l'intermédiaire duquel la partie de corps de palier (6 ; 7) peut être reliée avec un levier de serrage (2),
    c) le corps à disque (27), qui constitue la surface de palier de rail de serrage (30), le corps à disque (28), qui constitue la surface de palier de levier de serrage (58) et le tenon (29) étant reliés entre eux dans cet ordre.
EP17155241.7A 2017-02-08 2017-02-08 Outil de serrage et palier d'outil de serrage Active EP3360646B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17155241.7A EP3360646B1 (fr) 2017-02-08 2017-02-08 Outil de serrage et palier d'outil de serrage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17155241.7A EP3360646B1 (fr) 2017-02-08 2017-02-08 Outil de serrage et palier d'outil de serrage

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Publication Number Publication Date
EP3360646A1 EP3360646A1 (fr) 2018-08-15
EP3360646B1 true EP3360646B1 (fr) 2019-03-13

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Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490063A (en) 1923-04-10 1924-04-08 Walter S Tower Machinist's clamp
US2872854A (en) 1957-01-23 1959-02-10 Central Technical Inc Workpiece supporting clamp
DE1253556B (de) * 1958-07-28 1967-11-02 Hans Joachim Hammer Spannvorrichtung fuer unmittelbar auf dem Tisch einer Werkzeugmaschine aufzuspannende, insbesondere flache Werkstuecke
CH450871A (de) 1965-08-10 1968-04-30 Masch Und App Bau Marugg Ag B Aufspannvorrichtung
CH463244A (de) 1967-09-05 1968-09-30 Heule Vorrichtungs Und Maschb Niederzugspanner für Nutentische
FR2463408A2 (fr) 1972-01-28 1981-02-20 Carossino Andre Dispositif multiplicateur de puissance en particulier pour le calcul de la resistance des materiaux, la realisation d'empreintes, le bridage de pieces ou autres
CH597976A5 (en) 1975-09-02 1978-04-14 Paul Feusi Machine tool workpiece holder with support and clamp
DE2808667C2 (de) 1977-03-10 1984-11-22 André Cergy Carossino Spannvorrichtung zum Festspannen von Werkstücken
DE3003626A1 (de) 1980-02-01 1981-08-06 Horst Gustav Ing.(grad.) Appelt Spannwerkzeug
US4432538A (en) 1981-11-30 1984-02-21 Hector Sequin Machine tool clamp
US4470586A (en) 1982-07-09 1984-09-11 Spencer Philip P Machine clamp rockable in T slot
EP0391346B1 (fr) 1989-04-04 1993-09-29 Karl-Heinz Lenzkes Dispositif de fixation pour serrer une pièce à usiner sur une table de serrage
DE8904096U1 (de) 1989-04-04 1990-08-02 Lenzkes, Karl-Heinz, 5990 Altena Spannvorrichtung für Aufspanntische
DE4442803C1 (de) * 1994-12-01 1996-01-04 Shanview Patents Ltd Spannvorrichtung zum Festspannen eines Werkstücks auf einem Spanntisch
FR2767730B1 (fr) 1997-09-03 1999-10-29 Patricia Carossino Dispositif de bridage vertical a force d'application elevee
DE102006015855A1 (de) 2006-04-03 2007-10-18 Karl-Heinz Lenzkes Spannvorrichtung
DE202007001985U1 (de) 2007-02-10 2007-04-05 Lenzkes, Karl-Heinz Spannvorrichtung
DE202011101213U1 (de) * 2011-05-20 2012-08-21 Wilhelm Altendorf Gmbh & Co Kg Spannelement für Plattensäge

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