US3690208A - Variable speed drive mechanism - Google Patents

Variable speed drive mechanism Download PDF

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Publication number
US3690208A
US3690208A US102485A US3690208DA US3690208A US 3690208 A US3690208 A US 3690208A US 102485 A US102485 A US 102485A US 3690208D A US3690208D A US 3690208DA US 3690208 A US3690208 A US 3690208A
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US
United States
Prior art keywords
axis
cam track
follower
driven
lever
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.)
Expired - Lifetime
Application number
US102485A
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English (en)
Inventor
Hans Muller
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.)
Mueller Martini Druckverarbeitungs Systeme AG
Original Assignee
Grapha Maschinenfabrik Hans Mueller AG
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 Grapha Maschinenfabrik Hans Mueller AG filed Critical Grapha Maschinenfabrik Hans Mueller AG
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Publication of US3690208A publication Critical patent/US3690208A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/16—Cam means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/929—Particular nature of work or product
    • Y10S83/934—Book, being made, e.g. trimming a signature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/887—Parallel draw-cut [e.g., translatory]
    • Y10T83/8871—Link suspension

Definitions

  • Another object of the invention is to provide a drive mechanism for a cutter which maintains the cutter in its upperinoperative position a comparatively long part of the available time, while the cutter is rapidly moved to its lower cutting position, and even faster out of the same, so that a sufficient period of time is available for the feeding of the next object to be cut.
  • Another object of the invention is to provide a drive mechanism which is capable of reducing the speed of its output member to zero, while its input drive member rotates at constant speed.
  • Another object of the invention is to provide a variable speed drive mechanism which is capable of substantially varying the speed during successive operations at a high frequency.
  • an embodiment of the invention comprises rotary drive means, such as a gear, including a follower revolving along a circular path about a first axis; and driven means, such as a lever mounted for angular movement about a second axis parallel to the first axis, and having a curved cam track engaged by the follower, so that the driven means angularly moves between two end positions.
  • rotary drive means such as a gear
  • driven means such as a lever mounted for angular movement about a second axis parallel to the first axis, and having a curved cam track engaged by the follower, so that the driven means angularly moves between two end positions.
  • the cam track includes a curved cam track portion which is concave toward the axis of the drive means in one end position, and convex toward the same in the other end position of the driven means. It is necessary that the cam track intersects a plane passing through the first axis and the follower in all positions of the driven means at an angle different from a right angle. The ends of the curved cam track should not intersect with the circular path in any position of the driven means.
  • the radius of curvature of the curved cam track portion is selected in accordance with the invention to be approximately equal to the radius of the circular path. Consequently, when the curved cam track portion substantially coincides with a part of the circular path along which the follower moves, the speed of angular movement of the driven means is reduced.
  • the driven means substantially stops when the follower moves about the part circular cam track portion in one end position of the drive means. Since the follower moves during each revolution once along its circular path, the slowing down, or stopping, of the driven means in one end position corresponds to an increase of the speed of the driven means during the remaining part of the revolution of the drive means and follower.
  • the substantially part circular cam track portion coincides over an angle of substantially with the circular path when the driven means is in one end position.
  • the cutter is supported by a parallogram linkage, one link of which is an angular lever having one arm pivotally connected with the cutter, and the other arm of which is formed with a cam groove in which the follower of the rotating drive means, preferably an axially projecting pin, is guided.
  • FIG. 1 is a schematic and fragmentary view illustrating the principle of the invention, as represented by a first embodiment
  • FIG. 2 is a side elevation illustrating a preferred embodiment of the invention.
  • Cutter 1 has two pivots 2 and 2' to which two links 3 and 3' are articulated. Links 3 and 3' are mounted on pivots 4 and 4' in parallel position, and constitute a parallogram linkage. The axes of pivots 2,2 and 4,4 are perpendicular to the cutting plane of cutter l. Cutter 1 is movable between a cutting position shown in solid lines, and a retracted position shown in broken lines.
  • a driven lever 7 is mounted on a pivot 6 for angular movement about an axis parallel to the axis of pivots 4 and 4', and has at its end a cam track 5 whose construction will be explained in greater detail with reference to FIG. 2.
  • a link 8 connects driven lever 7 with the link 3 so that, when driven lever 7 is angularly reciprocated between the end positions shown in solid and broken lines, the parallogram linkage 3, 3 effects movement of cutter 1 between the cutting positions shown in solid lines and the inoperative position shown in broken lines.
  • the cam track 5 is engaged by follower 9 which is secured to a drive means 10 rotatable about shaft 11, and driven in the direction of the arrow.
  • the axis of symmetry of follower 9 moves along a circular or cylindrical surface 12, and it can be said that follower 9 moves along a circular path 12 about the axis of shaft 1 1 which is parallel to the axis of pivot 6.
  • driven lever 7 moves angularly between its two end positions.
  • the length of the cam track is selected so that the ends of the same do not intersect the imaginary cylindrical surface 12 during angular displacement of driven lever 7 between its end positions.
  • cam track 5 In the end position shown in solid lines, corresponding to the lowest position of cutter 1, cam track 5 is positioned to be convex toward shaft 11, while in the other end position, shown in broken lines, corresponding to the upper position of cutter l, cam track 5 is in a position concave toward shaft 1 1.
  • the central portion of cam track 5 coincides over an angle of 90 substantially with the cylinder surface 12.
  • the end portions of the cam track extend substantially tangential to the imaginary cylindrical surface 12 and to the circular path of the follower 9.
  • a support wall 13 supports a stationary cutter 14 and also supports two pivots 4 and 46 on which the link 3' and an angular double-armed lever 7' are mounted, respectively.
  • Angular lever 7 has an arm 30 performing the function of the link 3 in the embodiment of FIG. 1, and being connected with cutter 1 by pivot 2.
  • the other arm 7a of angular lever 7 has a curved cam groove 5 which has a substantially circular cam portion 5a extending over substantially 90, and two end portions 5b extending substantially in tangential directions from the ends of the central portion 5a.
  • a follower pin 9 is guided in the cam groove 5a, and is carried by a gear 10 which is rotatable about a shaft 11 supported on wall 13 in bearings, not shown.
  • Gear 10 meshes with intermediate gears 15 which are driven from a pin on a drive shaft 16.
  • the length of the cam groove 5 must be selected so that the ends of the same do not intersect the imaginary cylindrical surface 12, representing the circular path of follower 9, in any angular position of lever 7'. Assuming that the cam track portion 5a is circular, and that the center of the part circular cam track portion 5a is spaced the same distance from the axis of shaft 46 as is the axis of shaft 11, the center of the part circular central cam track portion 5a will coincide with the axis of shaft 11, and further assuming that the radius of the central part circular cam track portion 5a is the same as the radius of the circular path 12 along which cam follower 9 moves, the part circular cam track portion 5a will exactly coincide with the circular path 10 while its center is located in the axis of shaft 11.
  • the driven lever 7 moves comparatively fast to its other end position, in which cutter 1 is spaced the greatest distance from the stationary cutter 14.
  • the part-circular cam groove portion 5a coincides with the circular path of follower 9 over an arc of substantially 90 so that cutter 1 remains in its upper inoperative end position during turning of follower 9 over an angle of 90.
  • cam track 5 must be selected so that its longitudinal line of symmetry does not intersect a plane passing through the axis of shaft 6 or shaft 46 and the axis of symmetry of follower 9, at a right angle.
  • cam track portion 5a is circular, has the same radius as the radius of follower 9 with respect to the axis of shaft 11, and when the radial distance between the axis of symmetry of follower 9 and the axis of shaft 1 1 in relation to the axis of pivot 46 is the same, driven lever 7' will come to a complete standstill when follower 9 moves about cam track portion 5a.
  • Variable speed drive mechanism comprising r0- tary drive means including a follower revolving along a circular path about a first axis; driven means mounted for angular movement about a second axis parallel to said first axis, and having a curved cam track engaged by said follower so that said driven means moves between two end positions, said cam track including a curved cam track portion concave toward said first axis in one end position, and convex toward the same in the other end position, said cam track intersecting a plane passing through said first axis and said follower in all positions of said driven means at an angle different from a right angle, the radius of curvature of said curved cam track portion being approximately equal to the radius of said circular path so that when said curved cam track portion substantially coincides with a part of said circular path in one end position of said driven means, the speed of angular movement of said driven means is reduced; a cutting means including a stationary cutter, and a movable cutter cooperating with said stationary cutter in a cutting plane per
  • said curved cam track portion is substantially part circular, wherein said part circular cam track portion has a center spaced from said second axis substantially the same distance as said first axis; and wherein said cam track has two non-circular end portions whereby said driven means and said movable cutter substantially,
  • said driven means is a lever supported for angular movement in said cutting plane about said second axis; and wherein said mounting means include two parallel links, pivots supporting said links for movement about pivot axes parallel to said first and second axes, and a third link connecting said lever with one of said parallel links.
  • said mounting means include two parallel links, having equal lengths, and pivots supporting said parallel links for angular movement about parallel axes parallel with said first axis; and wherein one of said links is fixed to said driven means so that said second axis is the axis of said one link.
  • said one link is an angular lever having a first arm pivotally connected with said movable cutter and another arrn having said cam track.
  • Drive mechanism as claimed in claim 1, comprising a supporting wall supporting said mounting means; wherein said driven means includes a driven lever connected with said mounting means and having said cam track, said driven lever being supported on said wall for angular movement about said second axis, and wherein said drive means include a gear mounted on said supporting wall for rotation about said first axis and may ing said follower, and motor driven gear means meshing with said gear.
  • said driven means includes a lever supported for angular movement about said second axis, and being formed with a curved carn groove constituting said cam track; and wherein said drive means include a member rotatable about said first axis and carrying spaced from the same a cam follower pin guided in said cam groove.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Cutting Processes (AREA)
  • Surgical Instruments (AREA)
US102485A 1969-12-29 1970-12-29 Variable speed drive mechanism Expired - Lifetime US3690208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1933269A CH501472A (de) 1969-12-29 1969-12-29 Antrieb zur Steuerung der Bewegung eines Messers

Publications (1)

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US3690208A true US3690208A (en) 1972-09-12

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Application Number Title Priority Date Filing Date
US102485A Expired - Lifetime US3690208A (en) 1969-12-29 1970-12-29 Variable speed drive mechanism

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US (1) US3690208A (de)
CH (1) CH501472A (de)
DE (1) DE2049982A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516455A (en) * 1982-01-19 1985-05-14 H. Wohlenberg Kg Gmbh & Co. Three-knife trimmer
US5694823A (en) * 1994-10-18 1997-12-09 The Challenge Machinery Company Document trimming apparatus
US5809856A (en) * 1995-10-04 1998-09-22 Ferag Ag Method for cutting continuously conveyed flat products made of paper or of similar materials
US6134999A (en) * 1997-08-15 2000-10-24 Heidelberg Druckmaschinen Ag Trimming device for flat articles
US20040112195A1 (en) * 2001-03-20 2004-06-17 Mario Lorenzi Book trimming machine with combined-motion blades
US20150135924A1 (en) * 2013-11-18 2015-05-21 Charlie Zhang Cutting tool
CN107696093A (zh) * 2017-11-13 2018-02-16 梁兆寇 一种家庭用电动切肉机
US10086524B2 (en) 2012-12-07 2018-10-02 D-Cut Products, Inc. Cutting tool
US10434672B2 (en) 2017-07-31 2019-10-08 D-Cut Products, Inc. Cutting tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189922347A (en) * 1899-11-08 1900-09-01 Rudolf Karl Fomm Improved Paper-cutting Machine.
US763124A (en) * 1903-09-22 1904-06-21 Edgar J Stewart Cutter.
US2562938A (en) * 1948-03-22 1951-08-07 C L Moyer Company Five-knife four-stage book trimmer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189922347A (en) * 1899-11-08 1900-09-01 Rudolf Karl Fomm Improved Paper-cutting Machine.
US763124A (en) * 1903-09-22 1904-06-21 Edgar J Stewart Cutter.
US2562938A (en) * 1948-03-22 1951-08-07 C L Moyer Company Five-knife four-stage book trimmer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516455A (en) * 1982-01-19 1985-05-14 H. Wohlenberg Kg Gmbh & Co. Three-knife trimmer
US5694823A (en) * 1994-10-18 1997-12-09 The Challenge Machinery Company Document trimming apparatus
US6012367A (en) * 1994-10-18 2000-01-11 The Challenge Machinery Company Document trimming apparatus
US5809856A (en) * 1995-10-04 1998-09-22 Ferag Ag Method for cutting continuously conveyed flat products made of paper or of similar materials
US6134999A (en) * 1997-08-15 2000-10-24 Heidelberg Druckmaschinen Ag Trimming device for flat articles
US20040112195A1 (en) * 2001-03-20 2004-06-17 Mario Lorenzi Book trimming machine with combined-motion blades
US10086524B2 (en) 2012-12-07 2018-10-02 D-Cut Products, Inc. Cutting tool
US10814510B2 (en) 2012-12-07 2020-10-27 D-Cut Products, Inc. Cutting tool
US20150135924A1 (en) * 2013-11-18 2015-05-21 Charlie Zhang Cutting tool
US10434672B2 (en) 2017-07-31 2019-10-08 D-Cut Products, Inc. Cutting tool
CN107696093A (zh) * 2017-11-13 2018-02-16 梁兆寇 一种家庭用电动切肉机

Also Published As

Publication number Publication date
DE2049982A1 (de) 1971-07-01
CH501472A (de) 1971-01-15

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