EP0493714B1 - Méchanisme de commande pour trois fonctions avec un premier et un deuxième levier de commande - Google Patents

Méchanisme de commande pour trois fonctions avec un premier et un deuxième levier de commande Download PDF

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Publication number
EP0493714B1
EP0493714B1 EP91121239A EP91121239A EP0493714B1 EP 0493714 B1 EP0493714 B1 EP 0493714B1 EP 91121239 A EP91121239 A EP 91121239A EP 91121239 A EP91121239 A EP 91121239A EP 0493714 B1 EP0493714 B1 EP 0493714B1
Authority
EP
European Patent Office
Prior art keywords
control
control lever
arm
plane
stub shaft
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
EP91121239A
Other languages
German (de)
English (en)
Other versions
EP0493714A1 (fr
Inventor
Paul John Ernst
Rex Allen Hanson
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.)
Deere and Co
Original Assignee
Deere and Co
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Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of EP0493714A1 publication Critical patent/EP0493714A1/fr
Application granted granted Critical
Publication of EP0493714B1 publication Critical patent/EP0493714B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G13/00—Manually-actuated control mechanisms provided with two or more controlling members and also two or more controlled members
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers
    • 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
    • Y10T74/20012—Multiple controlled elements
    • Y10T74/20201—Control moves in two planes
    • 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
    • Y10T74/20396—Hand operated

Definitions

  • the invention relates to a control mechanism for three functions with a first and a second linked control lever, which are arranged in a support bearing such that the first control lever in a first plane for controlling a first function and in a second plane, which is perpendicular the first level is adjustable to control a second function and that the second control lever in the first level and in a third level that is parallel to the second level is adjustable to control a third function, the first control lever having a shift fork three arms and the second control lever has a connecting arm.
  • Such a control mechanism is used with preference in work vehicles which can be used in the construction industry and which are equipped at least on the front with a charger.
  • Such chargers are operated hydraulically. They are height adjustable and can be tilted forward for unloading. If they are equipped with a simple loading shovel, this can also be tipped to the side as required by the operator. In the case of a gripping shovel, it can also be opened and closed hydraulically.
  • the control mechanism should be able to perform three functions, namely raising and lowering the charger, tilting forward and a third depending on the equipment.
  • the individual movement processes are triggered by hydraulically actuated cylinders and the inflow of hydraulic fluid takes place depending on the position of control valves that can be manipulated via the control mechanism. These are often carried out when the work vehicle is moving when the driver still has to operate the steering wheel or the gear shift.
  • the object to be achieved with the invention is seen in a compact and simple design of the control mechanism and is achieved in that the support bearing receives a stub shaft vertically pivotable, on which a third arm connected to the shift fork of the first control lever and the connecting arm of the second control lever are fastened in this way are that the first and second control levers are adjustable together with the stub shaft in the first level, the first control lever in the second level and the second control lever in the third level, the stub shaft is connected at one end to a main ball joint which is connected to the support bearing and at the other is adjustable in a vertical guide slot in the support bearing. In this way, the stub shaft takes over the tasks of the previously required universal joint in a particularly simple manner.
  • a compact structure is given.
  • the desired function can already be achieved with the simplest means, for example a horizontal pin and a stub shaft arranged pivotably thereon.
  • the ball joint allows vibrations in all directions, which are limited again by the guide slot.
  • the guide slot results in a robust one Training so that no damage, for example due to bending, is to be feared even if the control lever is operated improperly. Seen as a whole, these measures result in a particularly advantageous solution which also meets the highest technical requirements.
  • the first and third arms of the shift fork of the first control lever can expediently have a transverse distance from one another in which the main ball joint is arranged.
  • the third arm of the shift fork and the connecting arm of the second control lever can each have an opening through which the stub shaft extends, which receives the third arm and the connecting arm in an axially non-displaceable manner.
  • the stub shaft can be designed in two parts in a simple manner, one part being designed as a sleeve with an internal thread and the other part as a pin with an external thread. The control levers on the stub shaft can then be easily axially secured via an additional nut without losing their rotatability.
  • the first arm is provided with an opening for connecting the control rod
  • the stub shaft is axially aligned with the opening in the first arm and lies in an axis which runs through the main ball joint .
  • the compact structure can be further promoted in that the connecting arm of the second control lever is arranged between the guide slot of the support bearing and the third arm of the shift fork.
  • the work vehicle 10 shown in FIG. 1 is primarily used in the construction industry. It is provided with a base frame 12 and front and rear wheels 14, at least the rear ones of which can be driven.
  • the work vehicle 10 can be equipped with work tools, in the present case with a rear bucket 16 and a front charger 18.
  • the charger 18 is connected to the base frame 12 via a rocker arm 20 and, in the exemplary embodiment, is designed as a hydraulically hinged gripping blade 22.
  • the rocker arm 20 is height-adjustable via hydraulically actuatable working cylinders 24, which are articulated on the one hand on the rocker arm and on the other hand on the base frame 12.
  • the gripping blade 22 is articulated. It can be tilted about its horizontally extending connecting axis by means of a single hydraulically actuatable tilt cylinder 26.
  • two working cylinders 28 are also provided, only one of which can be seen in the drawing and which can be opened and closing the gripping blade 22 serve.
  • the individual double-acting cylinders which perform the three functions described in the preceding paragraph, are connected to control valves, not shown in the drawing for the sake of simplicity, and their piston rods can be extended or retracted depending on the position of the control valves.
  • the control valves are operated by an operator located in a vehicle cabin 30, for which purpose a mechanical control mechanism is provided, which will be described below.
  • This control mechanism is particularly well suited for use on the work vehicle 10 shown in FIG. 1, but can nevertheless be used wherever three functions are to be controlled.
  • the control mechanism consists in particular of two control levers 32 and 34 which are close together and which are provided on a console arranged on the right-hand side of the cabin.
  • the distance between the two control levers 32, 34 is such that both control levers can be grasped simultaneously by the right hand of the operator.
  • the control lever 32 which is closest to the operator, switches the first hydraulic function, namely the tilt cylinder 26 for tilting the gripping blade 22, and the second hydraulic function, namely the lifting cylinders 24 for lifting and lowering the rocker arm.
  • the first hydraulic function namely the tilt cylinder 26
  • a third hydraulic function namely the working cylinder 28 for opening and closing the gripping blade 22 can also be controlled.
  • the control mechanism is shown in detail in Figs. 2-4. From Fig. 2 it can be seen that the first control lever 32 is welded to a mounting plate 36 which serves to receive an approximately hemispherical cover 38 shown in Fig. 1.
  • a shift fork 40 is fastened, for example welded, to the end of the first control lever 32 remote from its shift knob.
  • the shift fork 40 has three downwardly projecting arms 42, 44, 46 or tabs.
  • the first arm 42 is provided with a first connection point 48 in the form of an opening or bore and the second arm 44 is also provided with a second connection point 50 in the form of an opening or bore.
  • the third arm 46 is provided with a connection point 52 in the form of an opening or bore, which is used to fasten the shift fork 40, as will be explained later.
  • a stationary support bearing 54 for the control levers 32 and 34 can be firmly connected to the base frame 12 via a screw 56. Other connections, for example welding, are also possible.
  • a vertically extending guide slot 58 is incorporated and a connection point 60 for the shift lever with its linkage.
  • the connection point 60 is likewise designed in the form of an opening or bore and serves to receive a main ball joint 64.
  • the main ball joint 64 is fastened in the connection point 60 by means of a threaded pin which is connected, for example welded, to the outer jacket of the hollow spherical socket of the ball joint. extends through the junction 60 and is secured there by nuts 66 and 68. The outer part of the main ball joint 64 is thus arranged stationary.
  • a Stub shaft 70 connected in such a way that it can basically swing in all directions.
  • the stub shaft 70 is guided through the connection point 52 of the third arm 46 of the shift fork 40 and the shift fork can rotate on it.
  • the second shift lever 34 is provided on its shift knob remote end with a downward-pointing connecting arm 72, for example screwed. It has two openings 74 and 77 or bores one below the other, the upper or first opening 74 being provided with a bushing 76 in which the stub shaft 70 is received.
  • the connecting arm 72 is arranged next to the third arm 46 of the shift fork 40 and is separated from it only by a disk 82. The lower or second opening 77 is thus below the stub shaft 70 and forms a connection point for the third function.
  • the stub shaft 70 consists of two parts, namely a main part 78 provided with an external thread and an extension 80 provided with an internal thread and screwable onto the main part 78.
  • the connection of the two parts is easily recognizable in FIGS. 3 and 4.
  • the extension has a length such that it extends into the vertical guide slot 58, as a result of which the stub shaft can only carry out oscillating movements in the vertical direction. Vibrations in the horizontal direction are therefore excluded.
  • the extension 80 is also provided with a larger-diameter hexagon part 84 which, in the assembled state of the control mechanism, bears against the outside of the connecting arm 72.
  • the shift levers 32 and 34 are attached to the stub shaft 70 in such a way that both shift levers with their corresponding arms on the stub shaft 70 can rotate together but also independently of one another.
  • a swinging movement in the vertical direction around the main ball joint 64 can only be carried out together, so that the two shift levers 32 and 34 can only differ insignificantly or not at all when performing their three functions.
  • the first connection point 48 of the shift fork 40 is connected via a ball joint 90 to a shift rod 88, which serves to adjust the control valve or control slide, via which the tilt cylinder 26 of the gripping blade 22 is pressurized.
  • the tilt cylinder can thus be operated by both control levers.
  • the second connection point 50 of the shift fork 40 is connected via a ball joint (not shown in the drawing) to a control rod 92, via which the control valve for the lifting cylinder 24 of the rocker arm 20 is actuated.
  • a ball joint not shown in the drawing
  • the charger can thus be raised or lowered.
  • the third connection point 77 which is provided on the second control lever 34 or on its connecting arm 72, is, as can be seen in FIG. 2, via a ball joint 96 with a control rod 94, via which the control valve for the two working cylinders 28 is actuated can be.
  • the gripping blade 22 can thus be opened or closed.
  • control valves are stacked under the control mechanism on the base frame will.
  • spool of the control valves should be slidable in horizontal planes, and the control rods 88, 92 and 94 belong to a corresponding linkage.
  • control rods 88 and 92 are adjusted in vertical planes, while the control rod 94 is adjusted in a horizontal plane. Therefore, the control rods 88 and 92 are connected to angle levers which convert the vertical direction of movement of the control rods 88 and 92 into a horizontal direction of movement.
  • angle levers For the third control rod 94, two angle levers and two additional control rods are required in order to arrive at the associated control slide which is arranged horizontally and lies below the control mechanism.
  • control levers 32 and 34 can be rotated on the stub shaft 70 in two mutually parallel vertical planes, which are referred to in the claims as the second and third planes.
  • the rotation can take place independently of one another, or at the same time when the operator grasps both shift knobs with his right hand.
  • One of the control levers can also sit non-rotatably on the stub shaft if it can rotate in or with the main ball joint 64.
  • Both control levers can be adjusted together in a vertical plane of movement, which is referred to in the claims as the first level, which is perpendicular to the second and third levels.
  • the control mechanism is compact in a small space.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)
  • Operation Control Of Excavators (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Gear-Shifting Mechanisms (AREA)

Claims (5)

  1. Mécanisme de commande pour trois fonctions, avec un premier et un second leviers de commande (32, 34), mutuellement combinés, qui sont disposés dans un palier porteur (54) de telle sorte que le premier levier de commande (32) peut être déplacé dans un premier plan pour commander une première fonction et dans un deuxième plan, s'étendant perpendiculairement au premier plan, pour commander une deuxième fonction, et que le second levier de commande (34) peut être déplacé dans le premier plan et, pour commander une troisième fonction, dans un troisième plan s'étendant parallèlement au deuxième plan, le premier levier de commande (32) présentant une fourchette de commande (40) à trois bras (42, 44, 46) et le second levier de commande (34) présentant un bras de liaison (72), caractérisé en ce que le palier porteur (54) reçoit à pivotement vertical un bout d'arbre (70) sur lequel le troisième bras (46) de la fourchette de commande (40) du premier levier de commande (32) et le bras de liaison (72) du second levier de commande (34) sont fixés de telle sorte que, conjointement avec le bout d'arbre (70), le premier et le second leviers de commande (32 et 34) peuvent être déplacés dans le premier plan, le premier levier de commande (32) peut être déplacé dans le deuxième plan et le second levier de commande (34) peut être déplacé dans le troisième plan, le bout d'arbre (70) étant raccordé par une extrémité à une articulation sphérique principale (64) reliée au palier porteur (54), et pouvant, par son autre extrémité, être déplacé dans une fente de guidage (58) s'étendant verticalement dans le palier porteur (54).
  2. Mécanisme de commande selon la revendication 1, des tringles de commande (88, 92, 94), destinées à déclencher les trois fonctions, étant respectivement engagées aux extrémités du premier et du deuxième bras (42 et 44) de la fourchette de commande (40) et à l'extrémité du bras de liaison (72), caractérisé en ce que le premier et le troisième bras (42 et 46) de la fourchette de commande (40) du premier levier de commande (32) présentent entre eux une distance transversale dans laquelle est disposée l'articulation sphérique principale (64).
  3. Mécanisme de commande selon la revendication 1 ou 2, caractérisé en ce que le troisième bras (46) de la fourchette de commande (40) et le bras de liaison (72) du second levier de commande (34) présentent une ouverture respective (52, 74) à travers laquelle s'étend le bout d'arbre (70), lequel reçoit sans possibilité de translation axiale le troisième bras (46) et le bras de liaison (72).
  4. Mécanisme de commande selon l'une quelconque des revendications précédentes, le premier bras (42) étant pourvu d'une ouverture pour le raccordement de la tringle de commande (88), caractérisé en ce que le bout d'arbre (70) est axialement aligné avec l'ouverture du premier bras (42), et se situe sur un axe qui passe par l'articulation sphérique principale (64).
  5. Mécanisme de commande selon l'une quelconque des revendications précédentes, caractérisé en ce que le bras de liaison (72) du second levier de commande (34) est disposé entre la fente de guidage (58) du palier porteur (54) et le troisième bras (46) de la fourchette de commande (40).
EP91121239A 1990-12-21 1991-12-11 Méchanisme de commande pour trois fonctions avec un premier et un deuxième levier de commande Expired - Lifetime EP0493714B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/632,309 US5110253A (en) 1990-12-21 1990-12-21 Two-lever three function control mechanism
US632309 1990-12-21

Publications (2)

Publication Number Publication Date
EP0493714A1 EP0493714A1 (fr) 1992-07-08
EP0493714B1 true EP0493714B1 (fr) 1994-07-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121239A Expired - Lifetime EP0493714B1 (fr) 1990-12-21 1991-12-11 Méchanisme de commande pour trois fonctions avec un premier et un deuxième levier de commande

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US (1) US5110253A (fr)
EP (1) EP0493714B1 (fr)
DE (1) DE59102185D1 (fr)
ES (1) ES2056558T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5232057A (en) * 1991-08-01 1993-08-03 Case Corporation Single lever multiple function control mechanism
US6226582B1 (en) * 1997-07-21 2001-05-01 Sre Controls, Inc. Integrated control for electric lift trucks
US6564896B1 (en) 1999-06-22 2003-05-20 Caterpillar Inc Tiltable control console for a backhoe loader machine
US6213244B1 (en) * 1999-10-29 2001-04-10 Deere & Company Multi function control mechanism
US6481950B1 (en) 2000-09-29 2002-11-19 Deere & Company Control lever assembly
US6571902B2 (en) * 2000-12-28 2003-06-03 Case Corporation Backhoe auxiliary hydraulics control system
GB2402727A (en) * 2003-06-14 2004-12-15 Cnh Uk Ltd Lockable joystick control with wrist support
US7036248B2 (en) * 2003-10-25 2006-05-02 Deere & Company Pattern select valve for control levers of a title work vehicle
US7401542B2 (en) * 2006-02-28 2008-07-22 Deere & Company Adjustable hydraulic metering system
US7967024B2 (en) * 2008-03-14 2011-06-28 Clark Equipment Company Hydraulic valve assembly with valve locking mechanism
CN111186260B (zh) * 2020-01-08 2021-04-23 德州职业技术学院（德州市技师学院） 一种重型汽车的前桥转向结构

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US2818746A (en) * 1955-08-12 1958-01-07 Jack M Hart Flight controls mixing lever
GB1167518A (en) * 1965-12-21 1969-10-15 M A N Turbo G M B H Control Arrangement Comprising Two Hand Levers
US3795152A (en) * 1972-08-17 1974-03-05 Caterpillar Tractor Co Dual lever control
US3993175A (en) * 1974-10-23 1976-11-23 Fiat-Allis Construction Machinery, Inc. Control lever assembly for power shift transmission and modulating clutch
US3955437A (en) * 1974-11-15 1976-05-11 Massey-Ferguson Inc. Transmission control mechanism
US4054083A (en) * 1975-07-14 1977-10-18 Caterpillar Tractor Co. Dual lever control mechanism
GB1510170A (en) * 1975-12-19 1978-05-10 Bamford Excavators Ltd J Fluid control valve assembly
WO1981002209A1 (fr) * 1980-01-26 1981-08-06 Massey Ferguson Services Nv Disposition de levier de commande
US4526055A (en) * 1981-04-21 1985-07-02 Massey-Ferguson Services N.V. Lockable control lever arrangement
US4526204A (en) * 1982-05-17 1985-07-02 Dresser Industries, Inc. Control apparatus for hydraulic valve
US4716399A (en) * 1985-01-14 1987-12-29 The Boeing Company Optomechanical control apparatus
US4938091A (en) * 1988-10-26 1990-07-03 Deere & Company Three function control mechanism
GB8909955D0 (en) * 1989-04-29 1989-06-14 Bamford Excavators Ltd Control lever assembly

Also Published As

Publication number Publication date
EP0493714A1 (fr) 1992-07-08
US5110253A (en) 1992-05-05
ES2056558T3 (es) 1994-10-01
DE59102185D1 (de) 1994-08-18

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