US3358860A - Automatic valve control mechanisim for tractor mounted loaders - Google Patents

Automatic valve control mechanisim for tractor mounted loaders Download PDF

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Publication number
US3358860A
US3358860A US549406A US54940666A US3358860A US 3358860 A US3358860 A US 3358860A US 549406 A US549406 A US 549406A US 54940666 A US54940666 A US 54940666A US 3358860 A US3358860 A US 3358860A
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US
United States
Prior art keywords
bucket
valve
control rod
tractor
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
US549406A
Other languages
English (en)
Inventor
Donald M Jaruseski
Adolph M Schliwa
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to US549406A priority Critical patent/US3358860A/en
Priority to GB05883/67A priority patent/GB1175871A/en
Priority to DE1634751A priority patent/DE1634751C3/de
Priority to ES339834A priority patent/ES339834A1/es
Priority to BE698169D priority patent/BE698169A/xx
Priority to SE6428/67A priority patent/SE315540B/xx
Application granted granted Critical
Publication of US3358860A publication Critical patent/US3358860A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/432—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like for keeping the bucket in a predetermined position or attitude
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/34—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E02F3/3405—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism
    • E02F3/3411—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism of the Z-type

Definitions

  • detent means are employed to hold the valve in bucket raising position. Means are also employed to override the detent means and return the valve to neutral position when the bucket reaches a predetermined height.
  • the latter means includes a valve actuating lever, a control rod, and lever means actuating the control rod by the pivotal movement of the jack. Mechanical linkage is employed between the actuating lever and the valve. The control rod actuates means upon raising of the bucket to a predetermined height to bring the control rod into forcible contact with the actuating lever to actuate the same and override the detent means and return the valve to its neutral position.
  • This invention relates to automatic means for controlling the height to which a loader bucket is raised including detent mechanism for holding a control valve in a position which causes raising of the bucket and automatically releasing the control valve toward a neutral or hold position when the bucket attains a desired height.
  • detent mechanism for holding a control valve in a position which causes raising of the bucket and automatically releasing the control valve toward a neutral or hold position when the bucket attains a desired height.
  • Raising of the bucket requires time and attention of the operator to insure that the motion of the lift arms is stopped when the bucket has attained a proper height. Consequently, operator time and the duration of a complete operating cycle can be shortened by means for automatically discontinuing the raise cycle or stopping the bucket under predetermined height.
  • Another such mechanism is shown for example in our assignees Patent No. 3,211,310 to Robert G. McIndoo for Trip Mechanism for Automatically Positioning Vehicle Loaders.
  • Another object of the invention is to provide a mechanism with adjustable means to determine the height at which the bucket travel is interrupted but with such means permitting further upward movement under the control of the operator.
  • a still further object of the invention is to provide the last referred to means, together with an absolute limiting means so that the upward movement beyond the first limiting means will also be limited thus providing a maximum height to which the bucket may be moved.
  • FIG. 1 is a view in side elevation of a tractor mounted loader bucket having controls constructed in accordance with the present invention
  • FIG. 2 is an enlarged fragmentary sectional view illustrating the details of some of the controls shown in FIG. 1;
  • FIG. 3 is an enlarged detail of anism shown in FIG. 2;
  • FIG. 4 is an enlarged fragmentary view illustrating a modified form of a portion of the mechanism illustrated in FIG. 2.
  • FIG. 1 a conventional tractor is illustrated as having an operating station 10, an engine compartment 11 and supporting frames, one of which is shown at 12 for mounting the loader bucket 13.
  • the bucket is carried on lift arms 14 pivoted to the frame 12 at 15 and adapted to be raised and lowered by means of a double acting hydraulic jack 16.
  • Tilt linkage, generally indicated at 17, is operated by another double acting jack 18.
  • the lift arms, tilt linkages and jacks are generally provided in pairs, the other members of the pair being disposed on the opposite side of the tractor.
  • the lift jacks 16 which are employed to raise the bucket from the load position illustrated in FIG. 1 to an elevated or carry position are mounted on trunnions as shown at 20 and inraising and lowering of the lift arms the jack Will oscillate about as will also a trunnion band, a portion of which is shown at 21 in FIG. 2.
  • a bracket 23 is fixed to the trunnion band and will oscillate with the cylinder. Such oscillation of the bracket 23 imparts reciprocal movement to a connecting link 24 which is pivotally connected between the bracket and bellcrank 25 disposed beneath the control console which is shown at 26 in FIGS. 1 and 2.
  • the other end of the bellcrank 25 is pivotally connected with an automatic control rod 28, the function of which will presently be disclosed.
  • a lift jack control valve 31 This is a spool valve of conventional construction which is urged by a centering spring (not shown) to a neutral or hold position in which communication with both ends of the lift jack 16 is closed, holding the loader bucket in the position to which it has been adjusted. Raising of the lift arms is accomplished by movement of the control lever 30 to the broken line position shown in FIG. 2. Through a link 32, a lever 33 and link 34, this movement of the control lever imparts rocking motion to a bellcrank 35 in a clockwise direction. This actuates the spool of the valve 31 toward the left by means of a rod 39. This directs fluid under pressure in a well known manner to the head end of the jack 16 extending the jack and imparting raising movement to the lift arms.
  • a detent mechanism holds the valve 31 in a lift position and includes a pivoted lever 36 with a roller 37 thereon urged downwardly as by a spring 38.
  • the roller 37 bears against the end of an arm 40 which is carried by the bellcrank 35 and rides over the upper edge of this arm when the bellcrank has been moved in a clockwise direction to prevent return movement of the bellcrank and thus hold the valve in its lift position.
  • the effect of this detent is overcome by the automatic control rod 28, best shown in FIG. 2 as urged toward the left by a spring 42 and guided between a roller 43 and guide finger 44 on a lever 45 pivoted as at 46 to the console housing.
  • the control rod 28 is illustrated in the position occupied when the bucket is lowered.
  • the limit just set for the bucket position is somewhat below a maximum height and with the mechanism of the present invention the maximum height can still be obtained by the operator manually holding the control lever 30 in its lift position. As soon as the lever is again released, the spring 42 will be efiective to force it back to its hold position.
  • At the upper end of the rod 28' are a pair of adjustably positioned cams 55 and 6 secured to the rod by bolts extending through a slot 57.
  • a link 58 is pivotally connected to a bracket 59 on the console housing and has a slotted end embracing a pin 60' on the rod 28'.
  • a spring 62 urges the rod toward the left and upon clockwise movement of bellcrank 25, the rod is drawn downwardly and the cam 56 engages a roller 64 carried by the control lever extension 49' and swings the control lever toward its hold position.
  • control lever 30 If the operator manipulates the control lever 30 to overcome this release mechanism and to raise the bucket to its maximum position, he will overcome the force of spring 62 permitting the roller 64 to pass cam 56. Upon continued upward movement of the bucket, the cam will move downwardly and again urge the control lever 30 to its hold position when it attains its maximum height.
  • a valve for directing fluid to said jack upon movement of the valve away from a neutral position to raise the bucket, detent means to hold the valve in its bucket-raising position, and means to override the detent means and return the valve to its neutral position when the bucket reached a predetermined height
  • said last named means including a valve actuating lever, a control rod, means actuating said control rod by the pivotal movement of said jack, mechanical linkage between said actuating lever and said valve, and means operable by the actuation of said control rod upon raising of the bucket to a predetermined height to bring the control rod into forcible contact with the actuating lever to actuate the same and override the detent means and return the valve to its neutral position to hold said bucket at said predetermined height.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
US549406A 1966-05-11 1966-05-11 Automatic valve control mechanisim for tractor mounted loaders Expired - Lifetime US3358860A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US549406A US3358860A (en) 1966-05-11 1966-05-11 Automatic valve control mechanisim for tractor mounted loaders
GB05883/67A GB1175871A (en) 1966-05-11 1967-04-06 Tractor mountable bucket loader unit
DE1634751A DE1634751C3 (de) 1966-05-11 1967-04-14 Schaufellader
ES339834A ES339834A1 (es) 1966-05-11 1967-04-26 Mejoras en una pala cargadora montada sobre un tractor.
BE698169D BE698169A (de) 1966-05-11 1967-05-08
SE6428/67A SE315540B (de) 1966-05-11 1967-05-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US549406A US3358860A (en) 1966-05-11 1966-05-11 Automatic valve control mechanisim for tractor mounted loaders

Publications (1)

Publication Number Publication Date
US3358860A true US3358860A (en) 1967-12-19

Family

ID=24192903

Family Applications (1)

Application Number Title Priority Date Filing Date
US549406A Expired - Lifetime US3358860A (en) 1966-05-11 1966-05-11 Automatic valve control mechanisim for tractor mounted loaders

Country Status (6)

Country Link
US (1) US3358860A (de)
BE (1) BE698169A (de)
DE (1) DE1634751C3 (de)
ES (1) ES339834A1 (de)
GB (1) GB1175871A (de)
SE (1) SE315540B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716159A (en) * 1971-02-17 1973-02-13 Caterpillar Tractor Co Automatic valve control mechanism for vehicle mounted implements

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045845A (en) * 1958-08-20 1962-07-24 Eimco Corp Implement position control and indicator means
US3141562A (en) * 1962-04-12 1964-07-21 Clark Equipment Co Height limiter
US3161307A (en) * 1963-10-24 1964-12-15 Allis Chalmers Mfg Co Automatic bucket control
US3204794A (en) * 1963-11-04 1965-09-07 Allis Chalmers Mfg Co Automatic boom control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045845A (en) * 1958-08-20 1962-07-24 Eimco Corp Implement position control and indicator means
US3141562A (en) * 1962-04-12 1964-07-21 Clark Equipment Co Height limiter
US3161307A (en) * 1963-10-24 1964-12-15 Allis Chalmers Mfg Co Automatic bucket control
US3204794A (en) * 1963-11-04 1965-09-07 Allis Chalmers Mfg Co Automatic boom control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716159A (en) * 1971-02-17 1973-02-13 Caterpillar Tractor Co Automatic valve control mechanism for vehicle mounted implements

Also Published As

Publication number Publication date
DE1634751B2 (de) 1978-02-16
GB1175871A (en) 1970-01-01
BE698169A (de) 1967-10-16
DE1634751C3 (de) 1978-09-28
SE315540B (de) 1969-09-29
ES339834A1 (es) 1968-05-16
DE1634751A1 (de) 1970-08-13

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