EP3030379A1 - Griffe de serrage pour dispositif de serrage - Google Patents

Griffe de serrage pour dispositif de serrage

Info

Publication number
EP3030379A1
EP3030379A1 EP14748196.4A EP14748196A EP3030379A1 EP 3030379 A1 EP3030379 A1 EP 3030379A1 EP 14748196 A EP14748196 A EP 14748196A EP 3030379 A1 EP3030379 A1 EP 3030379A1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping claw
guide
piece
base 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.)
Granted
Application number
EP14748196.4A
Other languages
German (de)
English (en)
Other versions
EP3030379B1 (fr
Inventor
Rainer Zimmermann
Peter Steinbach
Volker Göbel
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.)
Andreas Maier GmbH and Co KG
Original Assignee
Andreas Maier GmbH and Co KG
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
Application filed by Andreas Maier GmbH and Co KG filed Critical Andreas Maier GmbH and Co KG
Publication of EP3030379A1 publication Critical patent/EP3030379A1/fr
Application granted granted Critical
Publication of EP3030379B1 publication Critical patent/EP3030379B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B25B5/105—Arrangements for positively actuating jaws using screws with one screw and one clamping lever and one fulcrum element with one end of the lever resting on a table and the screw being positioned between the ends of the lever

Definitions

  • the present invention relates to a clamping claw for a clamping device for clamping a workpiece to a work surface, wherein the clamping claw comprises a base body and a clamping piece, which is held relative to the base body displaceably on the base body.
  • Such a clamping claw serves to transmit a clamping force from the clamping device to the workpiece to be clamped.
  • clamping piece along a rectilinear displacement track is displaceable relative to the base body.
  • a clamping direction, along which a clamping force of the clamping device can be transferred to the workpiece to be clamped is always aligned exactly perpendicular to a longitudinal direction of the base body.
  • the present invention has for its object to provide a clamping claw of the type mentioned, which is more flexible, in particular in the clamped state of the workpiece, the clamping surface of the workpiece and the support surface of the clamping pad can be at different height levels and / or the clamping direction with the Lengthwise of the clamping claw can include an angle different from 90 °.
  • a clamping claw with the features of the preamble of claim 1, characterized in that the clamping claw comprises a guide device by means of which the clamping piece is displaceable along an at least partially curved displacement track relative to the base body. Due to the fact that the clamping piece of the clamping claw according to the invention is displaceable relative to the base body along an at least partially curved displacement track, the clamping piece, in particular one
  • the clamping surface of the workpiece and the support surface of the clamping claw with respect to the clamping direction can be at different height levels.
  • the guide device is formed so that the clamping piece is displaceable relative to the base body by means of the guide device along a curved in its entire course displacement track.
  • the displacement track is preferably curved in the same direction in its entire course.
  • the displacement track - seen from the clamping surface - is concavely curved, preferably over its entire course.
  • the radius of curvature of the displacement track is preferably constant over its entire course or preferably changes continuously along the entire course of the displacement track.
  • the guide device of the clamping claw according to the invention may comprise at least one at least partially curved guide channel.
  • the guide device comprises a guide channel which is formed curved over substantially its entire length is particularly favorable.
  • the guide device comprises two substantially mutually parallel guide channels.
  • the at least one guide channel of the guide device may have an edge which, viewed from the inside of the guide channel, is convexly curved, preferably over substantially the entire length of the displacement track, and / or has an edge which, viewed from the inside of the guide channel - Is concavely curved, preferably over substantially the entire length of the sliding path away.
  • the clamping piece comprises a guided by the guide device slidably guided guide member and a pivotable relative to the guide member pressure piece.
  • a clamping screw of the clamping device engages the pressure piece of the clamping piece, so that by pivoting the pressure piece relative to the guide member, the orientation of the clamping direction of the clamping device relative to the guide member is variable.
  • the pressure piece is steplessly pivotable relative to the guide part within a predetermined angular range.
  • the pressure piece from a central position by an angle of at least about + 10 ° and an angle of at least about - 10 ° relative to the guide member is pivotable.
  • the angular range within which the pressure piece is pivotable relative to the guide part is at least approximately 20 °.
  • the pressure piece comprises a support part and a holding part fixed to the support part.
  • the support member can be used in particular for placing a clamping disk and / or a clamping nut of the clamping device.
  • the holding part is inextricably fixed, for example by pressing, on the support part.
  • the holding part is detachably fixed, for example by screwing, on the support part.
  • Guiding part of the clamping piece engages behind.
  • the holding part can be secured by a positive connection to the guide part of the clamping piece.
  • the support part of the pressure piece engages behind the guide part of the tension piece, so that the support part of the pressure piece is secured by positive locking on the guide part.
  • the guide part of the clamping piece can comprise two guide projections, which are displaceably guided in two guide channels of the guide device.
  • the guide portion of the spanner may include one or more guide protrusions engaging a guide channel of the guide device and extending from a first edge of the guide channel to a second edge of the guide channel opposite the first edge.
  • the guide part is preferably displaceable along a predetermined by one or more guide channels, in particular curved, displacement track and particularly preferably prevented in a direction perpendicular to the displacement direction perpendicular to a displacement relative to the guide channel or relative to the guide channels.
  • the guide part of the clamping piece is held captive on the base body. Furthermore, it is provided in a preferred embodiment of the invention that the guide part of the clamping piece is continuously displaceable relative to the base body within a displacement path.
  • the guide part of the clamping piece can take any desired intermediate shift position between a first displacement end position and a second displacement end position relative to the main body.
  • the clamping claw comprises a cover which, preferably releasably, on the main body is fixed.
  • the cover is latched to the base body.
  • Such a cover may, in particular, have a recess through which the clamping piece extends.
  • Such a recess may be formed in particular as a recess.
  • the pressure piece of the clamping piece extends through the recess of the cover.
  • the base body comprises two side cheeks, which are arranged at least in sections at a distance from each other and captively connected to each other, summarizes.
  • the multi-part construction of the main body of two side cheeks has the advantage of reduced weight and lower material requirements, yet sufficient mechanical strength is ensured in order to transmit a sufficiently high clamping force of the clamping claw on the workpiece to be clamped can.
  • the side cheeks are spaced apart in all their sections.
  • Each of the side cheeks of the main body of the clamping claw according to the invention can each be formed in one piece or a plurality of layers.
  • the side cheeks are preferably connected to each other by positive locking and / or by frictional connection.
  • the clamping claw comprises at least one connecting element which is positively connected to at least one of the side cheeks.
  • such a connecting element is integrally formed.
  • at least one connecting element is positively connected to both side cheeks.
  • At least one connecting element has at least one rivet head.
  • Such a rivet head can be produced, for example, during the assembly of the clamping claw by press molding, preferably from a rivet head preform.
  • the clamping claw comprises at least one connecting element which is non-positively connected to at least one of the side cheeks.
  • Such a connecting element is preferably formed in one piece.
  • At least one connecting element is non-positively connected to both side cheeks.
  • At least one connecting element is connected to at least one of the side cheeks, preferably with both side cheeks, by press fitting.
  • At least one of the side cheeks is provided with recesses.
  • Such recesses may extend through the respective side cheek or be formed as depressions on one of the outer surfaces of the side cheek.
  • the surface covered by the recesses amounts to at least approximately one quarter of the total area of an outer surface, preferably a main surface, of the respective side wall.
  • the surface of the recesses at least about one-third, in particular at least about half, the
  • the surface of the guide channel is added to the aforementioned surface of the recesses.
  • At least one recess has at least one edge portion which is at an angle of about 20 ° to about 50 °, preferably at an angle of about 20 ° to about 40 °, is inclined relative to a direction perpendicular to the longitudinal direction and perpendicular to a transverse direction of the base body of the clamping claw direction of the main body of the clamping claw.
  • At least two recesses connect with each other a web whose longitudinal direction at an angle of about 20 ° to about 50 °, preferably at an angle of about 20 ° to about 40 °, with respect to the perpendicular to the longitudinal direction and perpendicular to Transverse direction of the main body extending direction of the body of the clamping claw is inclined.
  • At least one recess has at least one rounded corner region.
  • all corner areas are rounded in at least one recess.
  • the main body of the clamping claw comprises a base body lower part and a, preferably detachably, on the main body lower part fixed body upper part.
  • the main body lower part and / or the main body upper part are each formed in one piece.
  • a guide part of the clamping piece can be guided in at least one guide channel, which is bounded at the bottom by the main body lower part and at the top by the main body upper part.
  • the clamping body, on the clamping surface of which the workpiece to be clamped is clamped can be designed, for example, as a machine table or as a clamping pallet.
  • the main body of the clamping claw according to the invention preferably has at least one contact surface for applying the body to a clamping surface of the workpiece to be clamped and / or on a support surface which is convexly curved at least in sections, so that the base body in different angular positions relative to the clamping surface or relative to the Support surface can be applied to the clamping surface or to the support surface.
  • the clamping claw is particularly suitable for use in a clamping device which comprises a clamping screw whose longitudinal central axis defines the clamping direction of the clamping device.
  • FIG. 1 show a schematic perspective view of a clamping device, by means of which a workpiece is clamped on a clamping surface of a clamping body;
  • Fig. 2 is a side view of the tensioning device, the workpiece and the clamping body of Fig. 1;
  • Fig. 3 is a plan view from above of the clamping device, the workpiece and the clamping body of FIGS. 1 and 2;
  • FIGS. 1 to 3 shows a perspective view of a clamping claw of the clamping device from FIGS. 1 to 3;
  • Fig. 5 is a side view of the clamping claw of Fig. 4;
  • Fig. 6 is a plan view from above of the clamping claw of FIGS. 4 and 5;
  • FIG. 7 shows a longitudinal section through the clamping claw of FIGS. 4 to 6, wherein a clamping piece of the clamping claw is in a stop position or displacement end position; 8 shows a cross section through the clamping claw of FIG. 7 along the
  • FIG. 9 a of FIG. 7 corresponding longitudinal section through the clamping claw, wherein the clamping piece of the clamping claw has been moved from the sliding end position shown in Figure 7 in a displacement center position.
  • Fig. 11 is a corresponding to FIG. 4 perspective view of
  • FIG. 12 is a side view of the clamping claw of FIG. 11, at which the
  • Fig. 13 is a schematic perspective view of a second
  • Embodiment of a clamping device Embodiment of a clamping device.
  • clamping device 1 to 3, designated as a whole by 100 clamping device is used for clamping a workpiece 102 on a clamping surface 104 of a clamping body 106th
  • the clamping body 106 may be formed, for example, as a machine table or as a clamping pallet.
  • the clamping device 100 comprises a clamping claw 108 which, during operation of the clamping device 100, is supported on a clamping surface 110 of the workpiece 102 and on a supporting surface 112 of a clamping support or a supporting body 114.
  • the support body 114 may in particular be formed integrally with the clamping body 106.
  • the support body 114 is a separate component, which is arranged, for example, between the clamping claw 108 and the clamping body 106 during operation of the clamping device 100.
  • the clamping claw is shown in detail in FIGS. 4 to 12 and comprises a base body 116 with which the clamping claw 108 can be applied to the workpiece 102 and to the supporting body 114.
  • the base body 116 comprises two side cheeks 118 which both extend in a longitudinal direction 120 of the main body 116 and are spaced apart from one another in a transverse direction 122 of the main body 116 perpendicular to the longitudinal direction 120 (distance D in FIG. 11).
  • Each of the side cheeks 118 may be single-layered or, as in the case of the illustrated embodiment, multi-layered, in particular double-layered.
  • each side wall 118 may in particular comprise an outer layer 124 remote from the respective other side wall 118 and an inner layer 126 facing the respective other side wall 118.
  • the inner layer 126 and the outer layer 124 are preferably flat against each other.
  • Each layer 124, 126 of a side wall 118 may be formed plate-shaped, for example.
  • each layer 124, 126 of a side wall 118 is preferably constant along the longitudinal direction 120 of the clamping claw 108.
  • the outer layer 124 and the inner layer 126 of a side wall 118 may have the same thickness d or different thicknesses from each other.
  • the side cheeks 118 of the clamping claw 108 are preferably mirror-symmetrical to one another, specifically with respect to a longitudinal center plane 206 of the clamping claw 108 extending parallel to the longitudinal direction 120 and perpendicular to the transverse direction 122 of the clamping claw 108 (see FIGS. 8 and 10).
  • Each side wall 118 has on its underside a contact surface 128, with which the respective side cheek 118 can be applied to the clamping surface 110 of the workpiece 102 and / or to the support surface 112 of the support body 114.
  • the contact surface 128 is preferably curved.
  • the contact surface 128 in the end regions 127 of the clamping claw 108 is convexly curved.
  • the side cheeks 118 are connected to each other by means of a plurality of connecting elements 130, which extend in the transverse direction 122 of the base body 116.
  • One or more, for example, two, of these connecting elements 130 are formed substantially parallelepiped or plate-shaped.
  • One or more, for example, two, connecting elements 130 may be formed as one, for example substantially cylindrical, first connecting rod 136 and second connecting rod 138, respectively.
  • Each connecting rod 136, 138 comprises a middle section 140 arranged between the side cheeks 118 and two end sections 142, which have a smaller diameter than the central section 140 and engage in passage openings 144 formed in the side cheeks 118 complementary thereto.
  • the end portions 142 of the connecting rods 136, 138 are held by interference fit on the respective associated side wall 118, so that the two side walls 118 are frictionally connected to each other by the connecting rods 136, 138.
  • the connecting plates 132, 134 comprise a substantially parallelepiped-shaped central portion 146, which is arranged between the side cheeks 118 in the mounted state of the clamping claw 108, and two connecting portions 148 protruding from the middle portion 146 in the transverse direction 122, which pass through passages 150 formed in them in complementary fashion extend through the side cheeks 118 (see in particular Fig. 11).
  • the connecting sections 148 of the connecting plates 130, 132 each have at their respective free end remote from the central section 146 a rivet head preform which comprises an end piece which is connected via two webs to a base part of the respective connecting section 148 is. Between the webs, a recess is arranged, which separates the end piece from the base part in the initial state of the respective connecting plate 132, 134.
  • the connecting portion 148 can be inserted through the respective associated passage opening 150 in a side wall 118.
  • the rivet head preforms of the connecting portions 148 are deformed by press molding so that the respective end piece bears against the base part and buckle the webs so that from the Nietkopf- preform in the Rivet head 152 shown figures, which in a longitudinal direction of the passage opening 150 has a greater extent than the Nietkopf- preform and as the passage opening 150 itself.
  • the rivet head 152 thus has undercuts 154, which a retraction of the rivet head 152 through the respective associated passage opening 150th prevent.
  • the two side cheeks 118 are thus connected to one another in a form-fitting manner by the connecting plates 132 and 134 provided with rivet heads 152.
  • each side wall 118 is positively connected to each other in the assembled state of the base body 116 by the connecting plates 132 and 134 provided with rivet heads 152.
  • the side cheeks 118 of the base body 116 of the clamping claw 108 can be provided with recesses 156, which preferably extend in the transverse direction 122 of the base body 116 through the respective side cheek 118.
  • the recesses 156 only extend through in each case one of the layers 124, 126 of a multilayer side cheek.
  • the recesses 156 merely form depressions on one of the main surfaces (outer side 158 or inner side 160 facing the other side cheek 118) of the respective side cheek 118 and do not extend through the entire thickness of the respective side cheek 118 ,
  • the surface covered by the recesses 156 on a main surface 158, 160 of a side wall 118 is at least approximately one quarter of the total area of the relevant main surface 158 or 160 of the side wall 118 framed by the outer contour of the side wall 118.
  • this surface portion of the recesses 156 on the total area of the respective main surface 158, 160 of the side wall 118 is at least approximately one third, in particular at least approximately half.
  • At least one corner region 162 of at least one recess 156 is rounded, that is to say has no sharp edge.
  • all corner regions 162 of at least one recess 156 are rounded. It is particularly favorable if all corner regions 162 of all recesses 156 of the side cheeks 118 are rounded.
  • the recesses 156 can basically have any shape, for example a circular or polygonal shape.
  • most of the recesses 156 are substantially triangular, with rounded corner regions 162.
  • the recesses 156 have rectilinear edge sections 164, then it is favorable if some of these edge sections 164, preferably the majority of these edge sections 164, at an angle to a direction 165 of the base body 116 that is perpendicular to the longitudinal direction 120 and perpendicular to the transverse direction 122 of the base body 116 in the range of about 20 ° to about 50 °, preferably from about 20 ° to about 40 °.
  • a lower edge 166 of each side wall 118 between the end portions 127 of the clamping claw 108 is preferably curved, in particular concavely curved, and an upper edge 168 of each side wall 118 is also preferably curved, in particular convex curved, formed.
  • a curved guide channel 170 is provided on the same.
  • the curvature of the guide channel 170 is preferably formed so that a lower edge facing the lower edge 166 of the side cheek 118 172 of the guide channel 170, seen from the interior of the guide channel 170, is convexly curved, while an upper edge 174 of the guide channel 170, seen from the interior of the guide channel 170, is preferably formed concavely curved.
  • the guide channel 170 is closer to the top edge 168 of the side wall 118 than to the bottom edge 166.
  • one or more recesses 156 are arranged between the guide channel 170 and the lower edge 166 of the side cheek 118.
  • the guide channel 170 is formed only in one layer of a multilayer side wall 118, for example in the outer layer 124, while the respective other layer, for example the inner layer 126, has a recess 176 in the region of the guide channel 170.
  • a lower edge 178 of the recess 176 may be arranged adjacent to the lower edge 172 of the guide channel 170 and preferably extend substantially parallel to the lower edge 172 of the guide channel 170.
  • the lower edge 172 of the guide channel 170 and the lower edge 178 of the recess 176 may together form a stepped bearing surface 180 for a guide portion 182 of a along the guide channels 170 of the side cheeks 118 slidably guided clamping piece 184 of the clamping claw 108.
  • the clamping piece 184 comprises, in addition to the guide part 182, a pressure piece 186 which can be pivoted relative to the guide part 182.
  • the pressure piece 186 is held within a predetermined angular range of, for example, about +/- 10 ° stepless relative to the guide member 182 pivotally and preferably captive on the guide member 182.
  • the pressure piece 186 comprises a support part 188 for the support of a tensioning pulley 190 (see, for example, FIGS. 1 and 2) and a holding part 192 fixed to the support part 188, preferably non-detachably.
  • the support member 188 for example, substantially in the form of a spherical segment having a central passage opening 194.
  • the support member 188 rests with its spherical underside on a complementary designed top side of the guide member 182, which allows the pivoting of the support member 188 relative to the guide member 182 while sliding of the support member 188 on the guide member 182.
  • the holding part 192 has substantially the shape of a cylindrical sleeve, with an upper sleeve portion 198 and with a lower sleeve portion 202, which preferably has a larger outer diameter than the upper sleeve portion 198 and a passage opening 204 in the guide portion 182 of the clamping piece 184 passes.
  • the holding part 192 has a, preferably substantially cylindrical, passage opening 238.
  • a lower end portion of the lower sleeve portion 202 of the support member 192 projects downward over the guide member 182.
  • This end portion of the lower sleeve portion 202 is provided with retaining projections 206 which project toward the inner sides 160 of the side cheeks 118 and form undercuts, through which the holding part 192 is prevented from moving upward through the passage opening 204 in the guide member 182.
  • the holding part 192 and the support member 188 of the pressure member 186 are permanently fixed to each other, so that the support member 188 can not be solved by the guide member 182.
  • the support member 188 and the holding part 192 comprehensive pressure piece 186 is held captive on the guide member 182 of the clamping piece 184 by positive locking.
  • the guide part 182 of the clamping piece 184 comprises two in the assembled state of the clamping claw 108 from the longitudinal center plane 206 of the clamping claw 108 to the side walls 118 projecting guide protrusions 208, each in a the curved guide channels 170 engage on one of the side cheeks 118 and extend from the lower edge 172 of the relevant curved guide channel 170 to its upper edge 174.
  • the guide portion 182 of the clamping piece 184 is thus displaceable along a predetermined by the curved guide channels 170 curved track 210, in a direction perpendicular to the displacement track 210 direction but through the lower edge 172 and the upper edge 174 at a relative displacement to the guide channels 117 and thus prevented relative to the side walls 118.
  • the guide channels 170 thus form a guide device 209, by means of which the clamping piece 184 along the curved displacement track 210 is displaceable relative to the base body 116.
  • the guide projections 208 of the guide part 182 are preferably provided on their underside facing away from the support part 188 with a stepped guide surface 218, which are preferably formed substantially complementary to the stepped support surface 180 of the respective associated guide channel 170, so that the guide projections 208 substantially flat on the Resting surface 180 of the respective associated guide channel 170.
  • a first end portion 212 and a second end portion 214 of each guide channel 170 serve as stops for the guide part 182 of the clamping piece 184, which limit the displacement of the guide member 182 and thus of the clamping piece 184 in the longitudinal direction 120 of the base body 116 to the front or to the rear.
  • the clamping piece 184 is displaceable into the displacement middle position shown in FIGS. 9 and 10, in which the clamping piece 184 is arranged in the middle between its two displacement end positions.
  • the guide part 182 of the clamping piece 184 is preferably infinitely displaceable within the displacement path from the first displacement end position to the second displacement end position, that is to say in any displacement intermediate position, relative to the base body 116 of the clamping claw 108.
  • the pressure piece 186 is pivotable relative to the guide part 182 of the clamping piece 184, preferably at an angle of approximately +/- 10 °, in particular to a substantially flat bearing surface 216
  • the side facing away from the guide part 182 of the support member 188 to align substantially parallel to the clamping surface 104 of the Aufspann emotionss 106 can.
  • the clamping claw 108 may comprise a cover 220 which, preferably releasably, is fixed to the base body 116 of the clamping claw 108.
  • the cover 220 is locked to the base body 116.
  • the cover 220 may comprise two side parts 222, which in the mounted state of the clamping claw 108, preferably flat, bear against the outer side 158 of the respective associated side wall 118.
  • These side parts 222 can in particular cover the recesses 156 on the outer side 158 and / or on the inner side 160 of the respectively associated side wall 118.
  • the guide channels 170 in the side cheeks 118 are preferably not covered by the side parts 222, so that the position of the guide part 182 of the clamping piece 184 with respect to the end portions 212 and 214 of the guide channels 170 from outside the clamping claw 108 easily remains recognizable.
  • the cover 220 may include connecting portions 224 extending in the transverse direction 122 of the clamping claw 108 and connecting the two side portions 222 together.
  • the connecting parts 224 of the cover 220 are preferably formed so that they are outside the displacement path of the clamping piece 184, so that the displacement of the clamping piece 184 from the first displacement end position to the second displacement end position is not hindered by the cover 220 ,
  • the cover 220 between a first connecting part 224a and a second connecting part 224b has a recess 226 through which the pressure piece 186 of the clamping piece 184 extends therethrough.
  • This recess 226 of the cover 220 is bounded laterally by the side parts 222 of the cover 220.
  • the tensioning device 100 further comprises a clamping screw 228 with an external thread 230, with a shaft section 232 adjoining the external thread 230 and with a screw head 234 adjoining the end of the shaft section 232 facing away from the external thread 230, which is preferably in the form of a sliding block 236, in particular with im
  • Substantial T-shaped cross-section is formed.
  • the screw head 234 of the clamping screw 228 is guided in a complementary groove 238 of the clamping body 106, which thus preferably has a substantially T-shaped cross section (see in particular FIGS. 1 to 3).
  • the external thread 230 of the clamping screw 228 extends during operation of the clamping device 100 through the passage opening 238 of the holding part 192 of the pressure piece 186 of the clamping piece 184 (see Figs. 7 to 10) therethrough.
  • the axial direction of the external thread 180 defines a clamping direction 129 of the clamping device 100, along which the clamping claw 108 a clamping force on the workpiece 102 exerts.
  • This clamping direction 129 preferably runs essentially perpendicular to the transverse direction 122 of the main body 116 of the clamping claw 108.
  • a clamping nut 242 is screwed, which rests on the already mentioned above clamping plate 190 on the support member 188 of the pressure piece 186 of the clamping piece 184.
  • the workpiece 102 may be subjected to a workpiece machining, for example a machining operation.
  • the stress of the workpiece 102 is released on the clamping body 106, after which the workpiece 102 can be removed from the clamping body 106.
  • the clamping direction 129 which is parallel to the axial direction of the clamping screw 228, may include an angle ⁇ different from 90 ° with the rectilinear longitudinal direction 120 of the clamping claw 108, which in particular extends from the central axis of the first connecting rod 136 to the central axis of the second Connecting rod 138 runs.
  • the clamping direction 129 can also be aligned substantially perpendicular to the longitudinal direction 120 of the main body 116 of the clamping claw 108.
  • the support point 244, on which the clamping claw 108 rests on the clamping surface 104, and the support point 246, on which the clamping claw 108 rests on the support surface 112, along the clamping direction 129 by a height difference ⁇ may be spaced apart.
  • the normal direction of the contact surface 128 is always aligned parallel to the normal direction of the clamping surface 104 or the supporting surface 112.
  • the side cheeks 118 are cut out of a starting material, for example of a metallic sheet, for example punched out or cut out (for example by means of a laser).
  • the side cheeks 118 can thus be designed in particular as web plates.
  • the guide member 182 is, preferably in one piece, made of a suitable, preferably metallic, starting material and arranged between the two side walls 118 so that the guide projections 208 of the guide member 182 engage in the guide channels 170 of the side walls 118.
  • the side walls 118 are positively connected by means of the connecting rods 136 and 138 and by means of the connecting plates 132 and 134 form-fitting manner to the base body 116, so that the side cheeks 118 are captively connected to each other and to the guide member 182 of the clamping piece 184.
  • the support part 188 and the holding part 192 of the pressure piece 186 are made of a suitable starting material, in particular of a metallic material, from opposite sides of the
  • Guide member 182 introduced and insoluble, in particular by compression, fixed together.
  • the cover 220 is preferably made of a plastic material, for example by an injection molding, and releasably connected, in particular by latching, with the base body 116 of the clamping claw 108.
  • the clamping device 100 is completed by inserting the clamping screw 228 in the passage opening 238 of the pressure piece 186, attaching the clamping plate 190 and screwing the clamping nut 242 on the end portion 240 of the external thread 230 of the clamping screw 228.
  • the base body 116, the guide part 182, the support part 188 and the holding part 192 are preferably made of a metallic material, for example of a steel material. In principle, however, any other material which has suitable mechanical properties, for example a fiber-reinforced plastic material, can also be used for these constituents.
  • a second embodiment of a tensioning device 100 shown in FIG. 13 differs from the first embodiment shown in FIGS. 1 to 12 and described above by the configuration of the base body 116 of the clamping claw 108.
  • the base body 116 is not composed of side walls 118 and connecting elements 130, but comprises a main body lower part 248 and a, preferably detachably, on the main body lower part 248 fixed body upper part 250th
  • the main body lower part 248 is designed in the shape of a frame and comprises two side parts 252 extending in the longitudinal direction 120 of the main body 116, which are connected to one another by two connecting parts 254 extending in the transverse direction 122 of the main body 116.
  • the main body lower part 248 is preferably formed in one piece.
  • the main body lower part 248 is preferably formed from a metallic material, in particular from a steel material.
  • the frame-shaped main body lower part 248 encloses a passage opening 254, through which the clamping screw 228 extends in the mounted state of the tensioning device 100.
  • the main body upper part 250 is likewise frame-shaped and comprises two side parts 256 which extend in the longitudinal direction 120 and which are connected to one another by a central part 258, wherein the middle part 258 a passage opening 260, through which in the assembled state of the clamping device 100, the pressure piece 186 of the clamping piece 184 extends therethrough.
  • the main body upper part 250 is preferably formed in one piece.
  • the main body upper part 250 may in particular be formed from a plastic material, in particular as an injection molded part.
  • the main body upper part 250 is preferably latched to the main body lower part 248.
  • the guide channels 170 of the guide device 209 are delimited at the bottom by the main body lower part 248 and at the top by the main body upper part 250.
  • each of the side parts 252 of the base body lower part 248 may have on its upper side a stepped bearing surface 180, which forms the lower edge 172 of a guide channel 170.
  • the in the transverse direction 122 of the body 116 extending end edges 264 of the passage opening 260 in the main body shell 250 form stops for the clamping piece 184, which limit the displacement of the clamping piece 184.
  • the guide channels 170 thus formed on the base body 116 are curved as well as in the in FIGS. 1-12 illustrated first embodiment of the clamping device 100, and the guide projections 208 of the Guide parts 182 of the clamping piece 184 are guided in the guide channels 170 in the same way as in the first embodiment such that the clamping piece 184 is displaceable along a curved displacement track relative to the base body 116.
  • Guide channels 170 preferably formed closed towards the outside of the clamping claw 108.
  • the clamping piece 184, the clamping screw 228, the clamping disk 190 and the clamping nut 242 and the clamping body 106 may be formed in this second embodiment exactly as in the first embodiment described above.
  • the procedure is such that the guide part 182 of the clamping piece 184 between the main body lower part 248 and the body shell 250 is placed before the body shell 250, preferably releasably, on the Main body lower part 248 is fixed, for example by locking.
  • the guide part 182 is captively held between the main body lower part 248 and the main body upper part 250.
  • FIG. 13 illustrated second embodiment of the clamping device 100 in terms of structure, function and method of manufacture with the in Figs. 1 to 12 illustrated first embodiment, the above description of which reference is made.

Landscapes

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

Abstract

L'invention concerne une griffe de serrage (108) pour un dispositif de serrage (100) servant à serrer une pièce (102) sur une surface de serrage (104). L'objet de l'invention est de produire une griffe de serrage (108) qui comporte un corps de base (116) et un élément de serrage (184) maintenu sur le corps de base (116) de manière déplaçable par rapport à celui-ci, laquelle soit plus souple d'utilisation, la surface de serrage de la pièce et la surface d'appui (112) du bloc de serrage (114) pouvant être situées à des niveaux de hauteur différents et/ou la direction de serrage pouvant former un angle différent de 90° avec la direction longitudinale (120) de la griffe de serrage (108) en particulier lorsque la pièce (102) est serrée. A cet effet, la griffe de serrage comporte un dispositif de guidage (209) au moyen duquel l'élément de serrage (184) peut être déplacé par rapport au corps de base (116) le long d'une trajectoire de déplacement (210) au moins en partie courbe.
EP14748196.4A 2013-08-05 2014-08-04 Griffe de serrage pour dispositif de serrage Active EP3030379B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310215385 DE102013215385A1 (de) 2013-08-05 2013-08-05 Spannpratze für eine Spannvorrichtung
PCT/EP2014/066718 WO2015018789A1 (fr) 2013-08-05 2014-08-04 Griffe de serrage pour dispositif de serrage

Publications (2)

Publication Number Publication Date
EP3030379A1 true EP3030379A1 (fr) 2016-06-15
EP3030379B1 EP3030379B1 (fr) 2020-01-08

Family

ID=51298753

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Application Number Title Priority Date Filing Date
EP14748196.4A Active EP3030379B1 (fr) 2013-08-05 2014-08-04 Griffe de serrage pour dispositif de serrage

Country Status (4)

Country Link
EP (1) EP3030379B1 (fr)
DE (1) DE102013215385A1 (fr)
ES (1) ES2784159T3 (fr)
WO (1) WO2015018789A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108818037A (zh) * 2018-07-07 2018-11-16 无锡市海诚机电设备有限公司 一种机床用的可旋转多角度夹持机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102975055B (zh) * 2011-09-07 2015-03-18 朱华丰 一种模具压板
DE102014014353A1 (de) * 2014-10-05 2016-04-07 Wolfgang Rothfuss Spannelement zum Festspannen von Werkstücken und Werkzeugen unterschiedlicher Höhen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US893754A (en) * 1907-10-26 1908-07-21 William T Russell Reversible machinist's clamp.
CH160502A (de) * 1931-12-14 1933-03-15 Geissbuehler Ernst Spannkloben mit Bride.
DE945920C (de) * 1941-01-29 1956-07-19 Elisabeth Heuer Geb Wortmann Spannlasche zum Befestigen eines Werkstueckes auf einem Maschinentisch
US2672790A (en) * 1948-10-11 1954-03-23 Walter W Carroll Clamp
US3436072A (en) * 1965-09-14 1969-04-01 Bert N Svenson Self-adjusting workpiece clamp
FR2469243A1 (fr) * 1979-11-13 1981-05-22 Hm Bride universelle
CN201353704Y (zh) * 2009-01-04 2009-12-02 徐孝伟 轴心联动压板

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015018789A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108818037A (zh) * 2018-07-07 2018-11-16 无锡市海诚机电设备有限公司 一种机床用的可旋转多角度夹持机构

Also Published As

Publication number Publication date
EP3030379B1 (fr) 2020-01-08
WO2015018789A1 (fr) 2015-02-12
DE102013215385A1 (de) 2015-02-05
ES2784159T3 (es) 2020-09-22

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