GB2299154A - Control arrangement for actuation of control devices through a common control lever - Google Patents

Control arrangement for actuation of control devices through a common control lever Download PDF

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Publication number
GB2299154A
GB2299154A GB9605611A GB9605611A GB2299154A GB 2299154 A GB2299154 A GB 2299154A GB 9605611 A GB9605611 A GB 9605611A GB 9605611 A GB9605611 A GB 9605611A GB 2299154 A GB2299154 A GB 2299154A
Authority
GB
United Kingdom
Prior art keywords
control
swivel
mounting
bore
ball
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
GB9605611A
Other versions
GB9605611D0 (en
GB2299154B (en
Inventor
Michael Buchmann
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.)
STILL GmbH
Original Assignee
STILL GmbH
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
Priority claimed from DE19515016A external-priority patent/DE19515016A1/en
Application filed by STILL GmbH filed Critical STILL GmbH
Publication of GB9605611D0 publication Critical patent/GB9605611D0/en
Publication of GB2299154A publication Critical patent/GB2299154A/en
Application granted granted Critical
Publication of GB2299154B publication Critical patent/GB2299154B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/04703—Mounting of controlling member
    • G05G2009/04707—Mounting of controlling member with ball joint

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

A control arrangement for actuation of control devices comprises a common control lever 10 fixed to a mounting 7 which, in turn, is fixed to the ball 4 of a swivel joint by a screw 6. A mounting stem 2 extends from a swivel head 1. The mounting 7 and/or the swivel ball 4 is secured against rotation about the central axis of the bore 3 of the swivel ball 4. As illustrated, the mounting 7 includes two stop pins 12a, 12b which are disposed parallel with the bore 3 and between which the stem 2 is disposed. The pins slide on the stem 2 during a swivelling movement of the swivel ball 4. Pivots 11 are connectible to hydraulic slide valves of a fork-lift truck controlling vertical movement of a load carrier on a lifting framework and tilting movement of the lifting framework or the load carrier.

Description

1 CONTROL ARRANGEMENT FOR ACTUATION OF CONTROL DEVICES THROUGH A COMMON
CONTROL LEVER 2299154 The present invention relates to a control devices, and particularly concerns an arrangement for the actuation of two control devices by a common control lever which is connected to a mounting and is in operative connection with the control devices.
On fork-lift trucks so-called single-lever controls are used both to control the extension of the lifting framework to raise the load carrier, and to actuate a tilting device for the lifting framework. The actuators which perform these functions are usually hydraulic rams or motors, and are conventionally controlled by hydraulic slide valves. Here, it is possible to actuate the two slide valves to be actuated either separately, to move one or other of the actuators, or both together to move the two actuators in combination, using only a single control lever. The mounting required for this control lever generally includes a cardan universal joint which allows movements of the control lever about two horizontal axes disposed at right angles to one another, the control lever being able to adopt optional intermediate positions. In known control arrangements the cardan universal joint is constructed from precision machined elements.
The underlying object of the present invention is to provide a control arrangement of the kind described above, but with a simplified and more economic construction.
According to the present invention this object is achieved in that the mounting is fixed in the central bore of the swivel ball of a swivel joint which is disposed in a swivel head provided with a stem, the mounting and/or the swivel ball being secured against rotation about the central axis of the bore of the swivel ball.
A swivel joint or ball joint in the form of a swivel head is an industrially standardised component (German Industry Standard DIN 648), comprising a mounting stem, at one end of which is a mounting ring surrounding a spherical ball member through which a diametral bore extends. Therefore, the control arrangement according to the invention 2 can be produced with only a few components using standard parts, which simplifies construction as desired. This also reduces the manufacturing costs but still ensures adequate sturdiness and ease of maintenance of the control arrangement. When the swivel joint is worn, it can easily be changed.
A swivel joint has three degrees of freedom, the spherical ball member being able to rotate within the mounting ring about three orthogonal axes, one of which is coincident with the axis of the diametral bore in the ball. Since rotation of the control lever about its own longitudinal axis is neither necessary nor desirable for actuation of the control devices, the degree of freedom of the ball corresponding to this movement of the lever is suppressed by suitable means.
According to one advantageous embodiment of the invention, the mounting includes a pair of elongate parallel stop surfaces between which the mounting stem or stem of the swivel head is disposed, the distance between the stop surfaces and the stem being such that a sliding movement of the stop surfaces can occur relative to the stem during swivelling movement of the swivel ball about an axis parallel to the plane of the stop surfaces and perpendicular to the length of the stop surfaces. The stop surfaces prevent rotation of the mounting about the central axis of the bore of the swivel ball, but allow a movement of the swivel ball or the mounting in all the other directions. When worn, the pins can be changed.
It is expedient if the mounting includes a plate which is disposed at right angles to the bore of the swivel ball, and the stop surfaces are formed by two pins which are fixed in the plate and disposed parallel with the bore. Since pins are also available as standardised components (e.g. notched pins according to DIN 1472), the cost of production is further reduced.
A particularly simple construction of the control arrangement according to the invention is obtained if the plate is connected to the swivel head by a screw disposed in the bore of the swivel ball, the diameter of the head of the screw being greater than the diameter of the bore and a spacer sleeve being provided between the plate and the swivel ball.
3 When the mounting is provided with pivot pins to which articulated rods may be fixed, this is advantageous as regards the transmission of the movement produced by the control lever to the control devices. Here, the movement of the mounting follows an arcuate course and conforms without coercion in relation to a linear movement of the control devices.
The use of the control arrangement according to the invention for the single-lever control of the lifting framework of a fork-lift truck is particularly advantageous, when the control devices take the form of hydraulic slide valves, if a first slide valve is assigned to the vertical movement of a load carrier which is movable up and down on a lifting framework, and a second slide valve is assigned to the tilting movement of the lifting framework or the load carrier.
An embodiment of the present invention will now be described in detail with reference to the accompanying drawings, in which:
Figure 1 shows a side view of a control arrangement according to the invention.
Figure 2 shows a plan view of the control arrangement according to Figure 1.
The control arrangement according to the invention, which in the present embodiment example takes the form of a single-lever control for the lifting framework of a fork-lift truck, includes a swivel head according to DIN 648, which is provided with a stem 2 by which the swivel head is fixed to a supporting structure. The swivel head comprises a mounting ring 1 attached to one end of the stem 2, the mounting ring 1 surrounding a ball 4. The ball 4 is free to rotate about three orthogonal axes relative to the ring 1.
A screw 6 passes through a diametral bore 3 in the ball 4 of the swivel head, through a spacer sleeve 5, and is threadedly engaged in a mounting 7. The mounting 7 includes a plate 8 which is disposed at substantially right angles to the axis of the bore 3, and a control lever 10 is fixed to the plate 8. The spacer sleeve 5 is located round the screw 6, between the plate 8 and the swivel ball 4, and the head of the screw 6 clamps the ball 4 and the sleeve 5 to the plate 8.
4 The plate 8 has two side edges set at 900 to one another, and attached to these side edges of the plate 8 so as to extend perpendicularly to the plane of the plate there is an angle bracket 9 having two orthogonal sections. Attached to each of the orthogonal sections of the angle bracket 9 is a pivot 11, the two pivots being arranged with their axes disposed at 900 to one another, preferably fixed either by welding or by threaded engagement. Each pivot 11 serves for fixture of an articulated rod which is preferably connected with the slide of a control device in the form of a directional-control valve.
Two pins 12a, 12b (e.g. notched pins according to DIN 1472, as shown in Figure 1) are fixed in the plate 8. These serve as stop surfaces for the purposes of limiting the freedom of the mounting 7 to rotate, and are disposed parallel with the bore 3 of the swivel ball 4. The stem 2 of the swivel head 1 is enclosed between the pins 12a, 12b such that the swivel ball 4 is prevented from rotating about axes parallel to the axis of the bore 3. A sliding movement of the pins 12a, 12b against the stem 2 is not prevented during swivelling of the mounting 7, so that rotation about axes perpendicular to the axis of the bore 3 is permitted. In other words, the ball 4 can be rotated about a first axis which is the axis of the stem 2, and about a second axis which is perpendicular both to the axis of the stem 2 and to the axes of the pins 12a.
By arranging the bracket 9 to have sections substantially perpendicular to these first and second axes, the pivot pins 11 can be independently moved by respective rotation of the plate 8 about one or other of the first and second axes, and the two pivot pins 11 can be moved in unison by a combined rotation of the plate 8 about both the first and second axes. This allows two control valves attached to the pivot pins 11 to be operated either singly or together by one operating lever 10.

Claims (7)

1. A control arrangement for actuation of control devices through a common control lever which is connected with a mounting standing in operative connection with the control devices, characterised in that the mounting (7) is fixed in the central bore (3) of the swivel ball (4) of a swivel joint which is disposed in a swivel head (1) provided with a stem (2), the mounting (7) and/or the swivel ball (4) being secured against rotation about the central axis of the bore (3) of the swivel ball (4).
2. A control arrangement according to claim 1, characterised in that the mounting (7) includes two stop surfaces between which the stem (2) of the swivel head (1) is disposed, the distance between the stop surfaces and the stem (2) being such that a sliding movement of the stop surfaces occurs relative to the stem (2) during a swivelling movement of the swivel ball (4) about axes perpendicular to the axis of the bore (3) in the ball (4).
3. A control arrangement according to claim 2, characterised in that the mounting (7) includes a plate (8) which is disposed at right angles to the bore (3) of the swivel ball (4) and the stop surfaces are formed by two pins (12a, 12b) which are disposed parallel with the bore (3) and fixed in the plate (8).
4. A control arrangement according to claim 3, characterised in that the plate (8) is connected to the swivel head (1) by a screw (6) disposed in the bore (3) of the swivel ball (4), the diameter of the head of the screw (6) being greater than the diameter of the bore (3) and a spacer sleeve (5) being provided between the plate (8) and the swivel ball (4).
5. A control arrangement according to one of claims 1 to 4, characterised in that the mounting (7) is provided with pivots (11) for the fixture of articulated rods.
6. A control arrangement according to one of claims 1 to 5 for the single-lever control of the lifting framework of a fork-lift truck, wherein the control devices are hydraulic slide valves, a first slide valve being assigned to the control vertical movement of a load carrier which is movable up and down on a lifting framework, and a second slide 6 valve being assigned to control the tilting movement of the lifting framework of the load carrier.
7. A control arrangement substantially as described herein, with reference to Figures 1 and 2 of the accompanying drawings.
GB9605611A 1995-03-22 1996-03-18 A control arrangement for the actuation of control devices Expired - Fee Related GB2299154B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19510453 1995-03-22
DE19515016A DE19515016A1 (en) 1995-03-22 1995-04-24 Operating instructions for the actuation of control elements by a common operating lever

Publications (3)

Publication Number Publication Date
GB9605611D0 GB9605611D0 (en) 1996-05-22
GB2299154A true GB2299154A (en) 1996-09-25
GB2299154B GB2299154B (en) 1999-01-20

Family

ID=26013602

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9605611A Expired - Fee Related GB2299154B (en) 1995-03-22 1996-03-18 A control arrangement for the actuation of control devices

Country Status (3)

Country Link
FR (1) FR2732130B1 (en)
GB (1) GB2299154B (en)
IT (1) IT1283258B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325211A (en) * 1997-05-16 1998-11-18 Lansing Linde Ltd An operating arrangement for a load supporting device on a lift truck
WO2007109716A3 (en) * 2006-03-21 2008-01-10 Crown Equip Corp A control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800615A (en) * 1972-06-14 1974-04-02 Ware Machine Works Inc Single lever control mechanism
GB2101721A (en) * 1981-07-06 1983-01-19 Dana Corp Joystick control means
DE3414750A1 (en) * 1983-04-18 1984-10-18 Linde Ag, 6200 Wiesbaden Control device with two valves
US5129277A (en) * 1990-10-01 1992-07-14 Lautzenhiser John L X-Y controller with pivotally mounted transducers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800615A (en) * 1972-06-14 1974-04-02 Ware Machine Works Inc Single lever control mechanism
GB2101721A (en) * 1981-07-06 1983-01-19 Dana Corp Joystick control means
DE3414750A1 (en) * 1983-04-18 1984-10-18 Linde Ag, 6200 Wiesbaden Control device with two valves
US5129277A (en) * 1990-10-01 1992-07-14 Lautzenhiser John L X-Y controller with pivotally mounted transducers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325211A (en) * 1997-05-16 1998-11-18 Lansing Linde Ltd An operating arrangement for a load supporting device on a lift truck
WO2007109716A3 (en) * 2006-03-21 2008-01-10 Crown Equip Corp A control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle
CN101405213B (en) * 2006-03-21 2012-06-20 克朗设备公司 A control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle
US8225693B2 (en) 2006-03-21 2012-07-24 Crown Equipment Corporation Control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle

Also Published As

Publication number Publication date
FR2732130A1 (en) 1996-09-27
GB9605611D0 (en) 1996-05-22
IT1283258B1 (en) 1998-04-16
FR2732130B1 (en) 1999-02-12
ITMI960507A0 (en) 1996-03-15
GB2299154B (en) 1999-01-20
ITMI960507A1 (en) 1997-09-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000318