EP3254808A1 - Outil de serrage et sabot pour un outil de serrage - Google Patents

Outil de serrage et sabot pour un outil de serrage Download PDF

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Publication number
EP3254808A1
EP3254808A1 EP16173983.4A EP16173983A EP3254808A1 EP 3254808 A1 EP3254808 A1 EP 3254808A1 EP 16173983 A EP16173983 A EP 16173983A EP 3254808 A1 EP3254808 A1 EP 3254808A1
Authority
EP
European Patent Office
Prior art keywords
bearing
clamping
shoe
bearing shoe
clamping tool
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
EP16173983.4A
Other languages
German (de)
English (en)
Other versions
EP3254808B1 (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
Original Assignee
Lenzkes Spanntechnik GmbH
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Publication date
Application filed by Lenzkes Spanntechnik GmbH filed Critical Lenzkes Spanntechnik GmbH
Priority to EP16173983.4A priority Critical patent/EP3254808B1/fr
Publication of EP3254808A1 publication Critical patent/EP3254808A1/fr
Application granted granted Critical
Publication of EP3254808B1 publication Critical patent/EP3254808B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B5/108—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

  • Such clamping tools must be robust and durable, generate large clamping forces in small, especially manually applied via actuation tools actuating 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 be valid.
  • the invention relates to a bearing shoe for such a clamping tool.
  • the tensioning rail here has a bore, via which the tensioning rail can be screwed to a tensioning table with a T-slot nut and thus fixed to the tensioning table.
  • 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 clamping lever extends along the vertical leg of the T the longitudinal recess out of the clamping rail. Lateral journals of the clamping lever 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 clamping lever part, in which a clamping screw is screwed in one end.
  • Another clamping lever part of the clamping lever forms a jaw for the workpiece or a linkage of a tensioning chain.
  • Fig. 1 shows a bearing shoe 1 according to EP 0 714 734 B1 in a side view while Fig. 2 shows a cross section II-II of the bearing shoe 1 with inserted clamping lever 20.
  • the bearing shoe 1 has a roughly cuboid basic body 2, from which two parallel ribs 3, 4 extend upwards. Centered in the transverse direction extends from a front end face of the bearing shoe 1 in the vertical direction continuous longitudinal recess 5 in the base body 2. Lateral of the longitudinal recess 5, the base body 2 recesses 6, 7, by means of which a receptacle 8 is formed.
  • the recesses 6, 7 and the receptacle 8 are or is bounded laterally by vertical side walls 9, 10 of the bearing shoe 1 and bounded above by bends 11, 12, which bearing surfaces 13, 14 of the bearing shoe 1 form.
  • the clamping lever 20 has lateral bearing pins 15, 16 which can be inserted from below into the receptacle 8 and the bearing surfaces 17, 18 form, if this, while enabling a pivoting about a pivot axis 19 on the bearing surfaces 13, 14 of the bearing shoe 1 are supported.
  • clamping lever 20 is acted upon by a leaf spring of this assembly and disassembly position, namely in an opening direction of the clamping lever 20.
  • 12 of the bearing shoe 1 forms stages with horizontal support surfaces 23, 24 from. With these support surfaces 23, 24 of the bearing shoe is supported in the vertical direction on corresponding horizontal support surfaces of the clamping rail.
  • this clamping tool is on the Patent EP 0 714 734 B1 directed.
  • the invention has for its object to propose a bearing shoe for a correspondingly improved clamping tool.
  • the invention proposes a clamping tool, which is a clamping rail, a bearing shoe which is slidably guided in the direction of a longitudinal axis relative to the clamping rail, a clamping lever which is supported via lateral bearing pin pivotally mounted on a bearing of the bearing shoe, and a clamping screw, preferably is screwed into an end region of a clamping lever part of the clamping lever has.
  • the clamping tool basically according to the in EP 0 714 734 B1 be described embodiments described.
  • the invention is based on the finding that, according to the prior art, the receptacle formed by the bearing shoe has a complex geometry, which may also be costly to manufacture, since here a production of the inner and outer contours of the side walls 9, 10, the Abwinklept 11, 12 and the ribs 3, 4 and the bearing surfaces 13, 14 and support surfaces 23, 24 (see. Fig. 2 ) is required with the required precision.
  • the invention proposes that the receptacle formed by the bearing shoe is open laterally, whereby the side walls 9, 10, and under certain circumstances, the bends 11, 12, partially or completely omitted. As a result, the use of materials can be reduced, the weight can be reduced and there is a significant simplification of production.
  • the prior art requires that side walls of the clamping rail, side walls 9, 10 of the bearing shoe and the bearing pins 15, 16 must be arranged side by side in the lateral direction. If the side walls 9, 10 are omitted, a clamping tool can be provided that is compact at least in the area of the bearing journals 15, 16. Alternatively or cumulatively, it is possible that without an enlargement of the lateral dimensions in this area, side walls of the tensioning rail or else the bearing journals 15, 16 and / or a main body of the clamping lever may have a greater lateral extent, resulting in a more massive and stiffer configuration.
  • the bearing shoe extends in the region of the bearing journal (possibly exclusively) along the lateral surface of the bearing pin, while no material of the bearing shoe between the end faces of the bearing pin and the clamping rail is arranged.
  • the bearing shoe extends in the region of the bearing journal (possibly exclusively) along the lateral surface of the bearing pin, while no material of the bearing shoe between the end faces of the bearing pin and the clamping rail is arranged.
  • the clamping lever is guided laterally in the clamping rail by the abutment of end faces of the bearing journal on guide surfaces of the clamping rail. This results in an immediate lateral support of the clamping lever on the clamping rail.
  • the bearing surfaces of the bearing journals of the clamping lever and the bearing shoe have steps.
  • the clamping lever is then guided over the at least one stage laterally relative to the bearing shoe. In this way, the lateral support of the clamping lever initially on the step on the bearing shoe.
  • the bearing shoe is then guided by the system of a lateral side surface of the bearing shoe on a guide surface of the clamping rail laterally in the clamping rail.
  • bearing arms and the base body are connected to each other via stiffening ribs. This is the case in particular when the manufacture of the bearing shoe takes place in a non-cutting manufacturing process (in particular casting or forging).
  • the bearing shoe is made of a plate-shaped semi-finished product.
  • This may be, for example, a spring steel sheet of spring steel, to name just a few non-limiting examples.
  • the production of the bearing shoe can be made such that in the plate-shaped semi-finished end face a recess is introduced. Laterally of the recess then forms the remaining material of plate-shaped semi-finished the bearing arms, which protrude from the body.
  • the bearing arms are then formed cranked as a result of plastic deformation.
  • the said process steps can be carried out in any order. It is possible that subsequent to these steps, a post-processing, for example, with a milling of the bearing surfaces with the required accuracies and surface finishes.
  • the clamping lever is supported only by the leadership of the bearing pin of the clamping lever on the bearing surfaces of the bearing shoe on the one hand and by the support of the clamping screw on the support surface of the bearing shoe on the other hand with respect to its pivotal position on the bearing shoe.
  • the tension lever of a can basically be freely pivoted in the closing direction by the position of the clamping screw predetermined opening position. It is possible that in this case a spring is used, which acts on the clamping lever in the opening direction to bring about a defined starting position, which is predetermined by the clamping screw.
  • the clamping tool is formed without an opening spring, in which case, nevertheless, a pivot angle or a swivel angle range is predetermined according to the game.
  • a pivot angle or a swivel angle range is predetermined according to the game.
  • by specifying the swivel angle or the swivel angle range can also be avoided that unintentionally the clamping lever is pivoted into an assembly and disassembly position in which the clamping lever can be removed from the bearing shoe or unintentionally emerges from this. Rather, it may be necessary to bring about the assembly and disassembly position that the clamping screw is completely unscrewed from the clamping lever (and may also be removed from the bearing shoe).
  • Fig. 3 shows a partially sectioned side view of a clamping tool 25.
  • the clamping tool 25 consists of (or has) a clamping lever 20, a clamping screw 26, a bearing shoe 1 and a clamping rail 27th
  • the clamping surface 43 may be formed by a directly and integrally formed by the clamping screw 26 clamping plate 44. It is also possible that the clamping plate 44 is formed separately from a main body of the clamping screw 26 and is pivotally connected to the base body via a ball joint. With regard to further details of this embodiment, reference is made to the ball pressure screw, as this example. By the applicant under the order no. 310-12-036 or 310-12-040.
  • a support of the clamping lever 20 in the region of the pivot axis 19 thus takes place by the support of the bearing pins 15, 16 via the bearing arms 51, 52 on the transverse webs 50a, 50b of the clamping rail 27.
  • the lateral extent of the extension of the support surfaces 30, 31, 33, 34 and the bearing surfaces 13, 14, 17, 18 corresponds to or maximum ⁇ 30%, maximum ⁇ 20% or maximum ⁇ 10% of these deviates.
  • the distance of the lateral end faces of the bearing pins 15, 16 corresponds approximately to the sum of the lateral extent of the web 45 and the lateral extent of the bearing arms 51, 52.
  • the longitudinal recess 5 of the clamping rail 27 is limited in the region of the bearing pins 15, 16 of the clamping rail 27 on both sides in the shape of a horizontal U.
  • the base leg of the horizontal U is formed by the side wall 9, 10
  • the side legs of the horizontal U are formed by the underside of the transverse webs 50a, 50b and the top of the transverse webs 49a, 49b.
  • the bearing shoe 1 extends, here with the bearing arms 51, 52, exclusively above the bearing pins 15, 16 and below the upper side legs of the lying U.
  • Fig. 7 shows the cocking lever 20 in a partially sectioned side view
  • Fig. 8 the tensioning lever 20 in a cross section VIII-VIII according to Fig. 7 shows.
  • Fig. 8 It can be seen that the cross section of the clamping lever 20 in the region of the web 45 and in the region of the clamping lever parts 37, 38 does not differ or not more than 10% or 20%.
  • the components of the clamping tool 25 may be cast and forged, with an example. Milling post-processing of the components can take place, in particular for the production of the bearing surfaces 13, 14, the steps 57, 58 u. ä.
  • a clamping plate 44 which is integrally and integrally formed here by the clamping screw 26 (which is quite possible that the clamping plate is formed separately and is connected via a ball joint with a body of the clamping screw 26) is trapped in the groove 60 behind the undercuts 61, 62. This can be done with a game in the vertical direction or with a clearance fit or a transition fit.
  • a manufacture of the bearing shoe 1 can be made of a plate-shaped semi-finished product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
EP16173983.4A 2016-06-10 2016-06-10 Outil de serrage et sabot pour un outil de serrage Active EP3254808B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16173983.4A EP3254808B1 (fr) 2016-06-10 2016-06-10 Outil de serrage et sabot pour un outil de serrage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16173983.4A EP3254808B1 (fr) 2016-06-10 2016-06-10 Outil de serrage et sabot pour un outil de serrage

Publications (2)

Publication Number Publication Date
EP3254808A1 true EP3254808A1 (fr) 2017-12-13
EP3254808B1 EP3254808B1 (fr) 2021-03-31

Family

ID=56203138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16173983.4A Active EP3254808B1 (fr) 2016-06-10 2016-06-10 Outil de serrage et sabot pour un outil de serrage

Country Status (1)

Country Link
EP (1) EP3254808B1 (fr)

Citations (7)

* 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
CH450871A (de) * 1965-08-10 1968-04-30 Masch Und App Bau Marugg Ag B Aufspannvorrichtung
CH597976A5 (en) 1975-09-02 1978-04-14 Paul Feusi Machine tool workpiece holder with support and clamp
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
EP0714734B1 (fr) 1994-12-01 2001-10-24 Shanview Patents Limited Dispositif de fixation pour serrer une pièce à usiner sur une table de serrage
DE202007001985U1 (de) 2007-02-10 2007-04-05 Lenzkes, Karl-Heinz Spannvorrichtung
WO2007115640A1 (fr) 2006-04-03 2007-10-18 Karl-Heinz Lenzkes Dispositif de serrage

Patent Citations (8)

* 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
CH450871A (de) * 1965-08-10 1968-04-30 Masch Und App Bau Marugg Ag B Aufspannvorrichtung
CH597976A5 (en) 1975-09-02 1978-04-14 Paul Feusi Machine tool workpiece holder with support and clamp
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
EP0714734B1 (fr) 1994-12-01 2001-10-24 Shanview Patents Limited Dispositif de fixation pour serrer une pièce à usiner sur une table de serrage
WO2007115640A1 (fr) 2006-04-03 2007-10-18 Karl-Heinz Lenzkes Dispositif de serrage
DE202007001985U1 (de) 2007-02-10 2007-04-05 Lenzkes, Karl-Heinz Spannvorrichtung
EP1955816A2 (fr) 2007-02-10 2008-08-13 Karl-Heinz Lenzkes Dispositif de serrage

Also Published As

Publication number Publication date
EP3254808B1 (fr) 2021-03-31

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