US2587746A - Toggle press linkage - Google Patents

Toggle press linkage Download PDF

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Publication number
US2587746A
US2587746A US78763A US7876349A US2587746A US 2587746 A US2587746 A US 2587746A US 78763 A US78763 A US 78763A US 7876349 A US7876349 A US 7876349A US 2587746 A US2587746 A US 2587746A
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US
United States
Prior art keywords
toggle
frame
link
joint
crank
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
US78763A
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English (en)
Inventor
May Otto Hermann
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Individual
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Individual
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Publication date
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Publication of US2587746A publication Critical patent/US2587746A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/106—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by another toggle mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/16—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by fluid-pressure means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H21/00—Gearings comprising primarily only links or levers, with or without slides
    • F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
    • F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
    • F16H21/18—Crank gearings; Eccentric gearings
    • F16H21/22—Crank gearings; Eccentric gearings with one connecting-rod and one guided slide to each crank or eccentric
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18992—Reciprocating to reciprocating
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/20588—Levers toggle

Definitions

  • This invention relates to toggle presses, and with regard to certain more specific features, to improved linkages therefor.
  • Fig. 1 is a kinematic diagram illustrating one form of the invention
  • Figs. 2-4 are kinematic diagrams illustrating a second form of the invention in three different positions of operation (upper dead point, Fig. 2 intermediate position, Fig. 3; and lower dead point, Fig. 4)
  • Fig. 5 is a kinematic diagram of another form of the invention.
  • Fig. 6 is a kinematic diagram illustrating a symmetrical arrangement of two of the linkages shown in Figs. 2-4 operated from a common pinconnected driving block;
  • Fig. 7 is a'kinematic diagram showing a modified means for actuating the driving block, being illustrated in connection with the form of the invention shown in Figs. 2-4; and,
  • Fig. 8 is a kinematic diagram showing a form of the invention employing a toggle linkage which acts in tension.
  • the connecting rod of the toggle system is uniformly denoted by a, the crank arm by b.
  • the fulcrum pin of the system with the frame y is called c
  • the knee joint the moving pin-joint with the ram 2 is denoted d
  • the guide for the ram ise.
  • the transmission system consists of two links, an operating link 9 and a driving link q.
  • links 9 and q are pinned at h. This pin is forced to follow a curved path by means of a guide 11 in the frame.
  • Link q is pin-connected to a nut m in the form of a crosshead or slider block which is driven by a threaded spindle n along guide 0. Substantially constant rotary motion of the threaded spindle n is reversibly controlled to reciprocate the slider block or nut m.
  • the shape of'the curved guide p (Fig. 1)
  • the guide 11 can be made circular. But in this event, the guiding system for point it can be simplified as illustrated in Figs. 2-4.
  • the joint h is forced to move along a strictly circular path by provision of a guiding link i, rotating about a fixed pin-joint k.
  • the radius of the circle is determined by the length of the guiding link i and the center k lies within the sector swept by crank arm b. If in the system wherein the guiding link i forces joint 71.
  • the velocity-displacement curve of the ram is plotted, it is found that this curve is practically a straight line parallel to the path of point d, showing drooping characteristics of the velocities occurring only near the ends of the stroke.
  • link 9 (as shown in Fig. 5), instead of being coupled to the link i at joint h, may be coupled thereto at a joint w which is displaced inward from h, which somewhat simplifies the mechanical design of joint h without deviating far from the advantages stated.
  • Various positions of w on i may be selected.
  • Fig. 6 is shown a symmetrical compound arrangement of the structure illustrated in Figs. 2-4.
  • symmetrical parts corresponding to the parts of Figs. 2-4 are similarly lettered, except that those on the right are primed.
  • the frame is lettered 12/.
  • Both links q and q are attached to a common block m operated upon by a common threaded reversing spindle n.
  • the joints d and d may be carried on separate rams (as shown) or the same ram.
  • Fig. '7 is shown an arrangement like that illustrated in Figs. 2-4, except that the driving mechanism does not consist of the threaded spindle n and block m for forming a guided crosshead.
  • a piston-operated crosshead :c is employed, which moves along the straight-line guide 0.
  • the crosshead is reciprocated by means of a piston rod r connected to a reciprocating piston s moving in cylinder 1.. This motion is transmitted to the system through the driving link q.
  • the link i is pivoted to the frame at k.
  • the pressure-displacement relationships above mentioned can be changed by adjusting the position of this pivot point It.
  • Fig. 8 is shown an arrangement wherein the connecting rod of the toggle is actuated in tension and the table of the press is close to the pivot of the crank, so that the frame of the machine has compressive stresses only applied in a limited portion of it.
  • numeral l indicates the frame parts.
  • the toggle crank is indicated at 3, pinned at 1 to a connecting rod 5.
  • the connecting rod 5 is pinned at 9 to the ram or slide ll, operating in a guide l3 of the frame I.
  • Pinned to the frame at [5 is a triangular-shaped link I! (rigid within itself).
  • the link I! carries pin joints l9 and 2
  • a link 23 connects joint IS with joint I.
  • a link 25 connects joint 2
  • the reversing spindle 3! is threaded through the driving block 29 for reciprocating it. If the driving block be moved upward, the link I! is moved anticlockwise to draw down the pin joint l9 and consequently to draw down the pin joint 1. This draws down the connecting rod 5 in tension, so that the slide ll moves downward. It carries the tool that operates on a piece carried in the frame and supported upon a platen such as shown, for example, at 33. During the downward travel of the slide l I, the crank 3 and connecting rod 5 approach a coincident arrangement.
  • the advantageous relationship between the drag link 23 and crank 3 is more or less maintained throughout the action, namely, the pull of 23 remains more or less tangential to the path of the joint I. Also, the pull of rod 25 is substantially tangential to thepath of its driving end at 2
  • the ram of the press is directly actuated by the toggle linkage.
  • the driving block is connected with the knee joint through what may be referred to as concatenated drag links, a joint of which is constrained to move in a curved path (preferably circular).
  • the press constructed according to the invention above-described is especially suited to be employed for conditions that ordinarily require a hydraulic press, such as presses for plastics, extrusion (hot or cold), etc. It should be understood, however, that the invention has other applications such as to crushers and the like, and the term press is intended to comprehend any apparatus wherein pressure is required to be exerted substantially constantly over a wide range.
  • the main toggle system is composed of a press frame, a ram slide, a crank pivoted to the frame, and a connecting rod connecting the crank with the ram slide, the crank and the connecting rod being adapted to be swung from a substantial angular relationship to a small angular relationship near the dead point.
  • These parts in Figs. 1-7 are, respectively, frame y, ram a, crank 12 and connecting rod a, with corresponding primed letters in Fig. 6.
  • Fig. 8 these parts are the frame I, ram l l, crank 3 and connecting rod 5.
  • This toggle system is coordinated with What may be called a drag link system composed of the frame, the crank, the drag link, and guiding curve means for one end of the drag link.
  • the drag link system is constituted by the frame 11, crank b, drag link g and the curved guide p.
  • this drag link system is the frame y, crank b, drag link g, and crank i, primed letters in Fig. 6 corresponding to corresponding parts.
  • the drag link system is constituted by the frame I, crank 3, drag link 23 and crank IT.
  • the above-mentioned drag link system is operated by a slider mechanism which is constituted by the frame of the machine, a driving slider, a connecting rod between the driving slider and one of the cranks of said drag link system or the curved glide.
  • the slider mechanism is the frame 11, crosshead m and connecting rod q and. guide p.
  • the slider mechanism is the frame 3 the crosshead m, connecting rod q and crank i, primed letters in Fig. 6 corresponding to corresponding parts.
  • the slider mechanism is constituted by the frame I, crosshead 29, connecting rod 25 and crank [1.
  • a frame a combination of a toggle system and an articulated compensating drag link system adapted to produce a mechanical advantage throughout the driving movement of the press which is substantially more uniform than that of which the toggle system alone is capable;
  • said toggle system comprising a crank arm pivot- ⁇ ed at a fulcrum and pivoted at a knee joint to a ram-controlling first connecting rod;
  • said drag link system comprising a drag link connected at one end to the toggle system, means establishing a curvilinear trajectory for the other end of the drag link, a driving slide in a guide which extends in a direction substantially parallel with the straightened position of the toggle system and primarily on the side of the toggle system opposite its break side, said trajectory lying primarily between the straightened position of the toggle system and said guide means and being convex toward the fulcrum and having a tangent at one portion which is substantially angled to the guide means and having a second tangent which lies at a smaller angle to the guide means, and a second connecting rod pivoted

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Press Drives And Press Lines (AREA)
US78763A 1948-08-24 1949-02-28 Toggle press linkage Expired - Lifetime US2587746A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2587746X 1948-08-24
GB22071/49A GB689899A (en) 1948-08-24 1949-08-24 Toggle press
DE2667788X 1949-12-16

Publications (1)

Publication Number Publication Date
US2587746A true US2587746A (en) 1952-03-04

Family

ID=32302824

Family Applications (2)

Application Number Title Priority Date Filing Date
US78763A Expired - Lifetime US2587746A (en) 1948-08-24 1949-02-28 Toggle press linkage
US200734A Expired - Lifetime US2667788A (en) 1948-08-24 1950-12-14 Long-stroke press drive means

Family Applications After (1)

Application Number Title Priority Date Filing Date
US200734A Expired - Lifetime US2667788A (en) 1948-08-24 1950-12-14 Long-stroke press drive means

Country Status (5)

Country Link
US (2) US2587746A (de)
CH (1) CH273192A (de)
DE (1) DE839759C (de)
FR (1) FR993584A (de)
GB (1) GB689899A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833349A (en) * 1955-01-26 1958-05-06 Lee B Green Shear
US3007675A (en) * 1958-10-16 1961-11-07 Escher Wyss Ag Adjusting device for water turbine guide apparatus
US3044393A (en) * 1959-05-05 1962-07-17 Bobst And Son Sa J Driving mechanisms of the movable platen of a platen-press
US3135849A (en) * 1962-02-28 1964-06-02 Cutler Hammer Inc Thermostatic control switches for refrigerators and the like
US3200907A (en) * 1963-09-25 1965-08-17 Eimer K Hansen Positive parking brake
FR2416109A1 (fr) * 1978-02-02 1979-08-31 Schuler Gmbh L Dispositif pour le fonctionnement intermittent d'une poinconneuse de rainures
US4811622A (en) * 1985-02-20 1989-03-14 Shichiro Sato Force multiplier
US5157981A (en) * 1991-05-28 1992-10-27 Kim Chang H Motion lever
US5649454A (en) * 1995-05-15 1997-07-22 Purdue Research Foundation Compliant constant-force mechanism and devices formed therewith
US8826596B2 (en) * 2010-05-18 2014-09-09 Ford Global Technologies, Llc Door edge protection device
US10473152B1 (en) * 2015-07-31 2019-11-12 University Of South Florida Linear bi-stable compliant crank-slider-mechanism

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906855A (en) * 1956-07-19 1959-09-29 Wade Electric Products Co Machine
US3081640A (en) * 1960-06-21 1963-03-19 Chatillon & Sons John Movement multiplying mechanism
GB958288A (en) * 1960-10-22 1964-05-21 Schuler L Ag Drawing press
DE1292777B (de) * 1961-04-08 1969-04-17 Moenus Maschf Brueckenstanze
US3161302A (en) * 1961-11-09 1964-12-15 American Sugar Pallet loading apparatus
US3647322A (en) * 1967-04-12 1972-03-07 Hans Molly Device for controlling quantities which are defined by the product of two measured variables
DE2934286C2 (de) * 1979-08-24 1984-06-14 L. Schuler GmbH, 7320 Göppingen Mehrpunkt-Pressenantrieb
DE3104263C2 (de) * 1981-02-07 1983-11-24 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Antriebsgestänge mit progressiver Übersetzung als Zwischenbauteil
ATE8756T1 (de) * 1981-02-11 1984-08-15 L. Schuler Gmbh Pressenantrieb.
DK156915C (da) * 1983-01-14 1990-03-05 Ac Energi Aps Fireledsmekanisme til overfoering af bevaegelse mellem to forskydelige stempler
EP0283532B1 (de) * 1987-03-24 1991-06-05 Leinhaas, Werner, Ing.-grad. Schneid- und Umformpresse mit hydro-mechanischem Gelenkantrieb
ATE162134T1 (de) * 1993-03-23 1998-01-15 Leinhaas Umformtechnik Gmbh Verfahren zur hydraulischen ansteuerung einer gelenk- oder kniehebelpresse und gelenk- oder kniehebelpresse mit einer steuerung adaptiert für das ausführen des verfahrens
DE19626844C2 (de) * 1996-07-04 1999-02-25 Wandschneider Ingeborg Vorrichtung zum Auslösen einer Gasfeder
CN107718625A (zh) * 2017-11-27 2018-02-23 苏州韩工机械科技有限公司 冲压装置
CN107877902A (zh) * 2017-11-27 2018-04-06 苏州韩工机械科技有限公司 可用于冲压、拉伸和挤压生产的力多级放大装置
CN107718626A (zh) * 2017-11-27 2018-02-23 苏州韩工机械科技有限公司 可调冲压装置
CN107953585A (zh) * 2017-11-27 2018-04-24 苏州韩工机械科技有限公司 两级紧密冲压装置
CN107877918A (zh) * 2017-11-27 2018-04-06 苏州韩工机械科技有限公司 可用于冲压、拉伸和挤压生产的装置
CN107716685A (zh) * 2017-11-27 2018-02-23 苏州韩工机械科技有限公司 冲压机

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246892C (de) *
US643832A (en) * 1898-07-25 1900-02-20 John W Swan Pumping-jack.
US1091659A (en) * 1912-03-12 1914-03-31 Gen Electric Oil-switch.
US1387729A (en) * 1919-10-22 1921-08-16 Emmett J Mcgorry Railway-car brake
US1675494A (en) * 1926-12-10 1928-07-03 Jennings William Screw and nut gearing
US1680729A (en) * 1925-10-16 1928-08-14 Prosperity Co Inc Mechanical movement for pressing machines
US1820051A (en) * 1925-12-11 1931-08-25 Prosperity Co Inc Motion transmitting mechanism
US1945496A (en) * 1932-11-23 1934-01-30 Cushman Chuck Co Press actuating mechanism
US2269308A (en) * 1937-09-07 1942-01-06 Nicholas L Strike Toggle mechanism for presses
US2318814A (en) * 1942-04-07 1943-05-11 George F Strong Motor drive for toggle links

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR708935A (fr) * 1930-01-11 1931-07-30 Westinghouse Electric & Mfg Co Appareil d'ouverture de porte automatique
DE720875C (de) * 1938-10-25 1942-05-18 Ade Werk Bremsvorrichtung fuer Fahrzeuge mit einem stufenlos sich aendernden, eine im wesentlichen gleichbleibende Bremskraft bewirkenden UEbersetzungsverhaeltnis im Bremsgestaenge

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246892C (de) *
US643832A (en) * 1898-07-25 1900-02-20 John W Swan Pumping-jack.
US1091659A (en) * 1912-03-12 1914-03-31 Gen Electric Oil-switch.
US1387729A (en) * 1919-10-22 1921-08-16 Emmett J Mcgorry Railway-car brake
US1680729A (en) * 1925-10-16 1928-08-14 Prosperity Co Inc Mechanical movement for pressing machines
US1820051A (en) * 1925-12-11 1931-08-25 Prosperity Co Inc Motion transmitting mechanism
US1675494A (en) * 1926-12-10 1928-07-03 Jennings William Screw and nut gearing
US1945496A (en) * 1932-11-23 1934-01-30 Cushman Chuck Co Press actuating mechanism
US2269308A (en) * 1937-09-07 1942-01-06 Nicholas L Strike Toggle mechanism for presses
US2318814A (en) * 1942-04-07 1943-05-11 George F Strong Motor drive for toggle links

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833349A (en) * 1955-01-26 1958-05-06 Lee B Green Shear
US3007675A (en) * 1958-10-16 1961-11-07 Escher Wyss Ag Adjusting device for water turbine guide apparatus
US3044393A (en) * 1959-05-05 1962-07-17 Bobst And Son Sa J Driving mechanisms of the movable platen of a platen-press
US3135849A (en) * 1962-02-28 1964-06-02 Cutler Hammer Inc Thermostatic control switches for refrigerators and the like
US3200907A (en) * 1963-09-25 1965-08-17 Eimer K Hansen Positive parking brake
FR2416109A1 (fr) * 1978-02-02 1979-08-31 Schuler Gmbh L Dispositif pour le fonctionnement intermittent d'une poinconneuse de rainures
US4270413A (en) * 1978-02-02 1981-06-02 L. Schuler Gmbh Intermittent operation arrangement in a notching machine
US4811622A (en) * 1985-02-20 1989-03-14 Shichiro Sato Force multiplier
US5157981A (en) * 1991-05-28 1992-10-27 Kim Chang H Motion lever
US5649454A (en) * 1995-05-15 1997-07-22 Purdue Research Foundation Compliant constant-force mechanism and devices formed therewith
US8826596B2 (en) * 2010-05-18 2014-09-09 Ford Global Technologies, Llc Door edge protection device
US10473152B1 (en) * 2015-07-31 2019-11-12 University Of South Florida Linear bi-stable compliant crank-slider-mechanism

Also Published As

Publication number Publication date
FR993584A (fr) 1951-11-02
US2667788A (en) 1954-02-02
GB689899A (en) 1953-04-08
DE839759C (de) 1952-05-23
CH273192A (de) 1951-01-31

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